Pneumatic liquid output pump

Abstract

A pneumatic liquid output pump is communicated with a first air pressure source, a second air pressure source and a liquid supply source and comprises a pump body, a first piston and a second piston. The pump body is provided with a first working chamber, a second working chamber, a first gas channel, a second gas channel, a third gas channel, a fourth gas channel and a liquid working chamber. The first piston is arranged in the first working chamber. The second piston is disposed in the second working chamber and moves between a third piston position and a fourth piston position. When the second piston is located at the third piston position, the liquid working chamber sucks a working liquid from the liquid supply source, and when the second piston is located at the fourth piston position, the second piston extends into the liquid working chamber to pressurize and output the working liquid. The pneumatic pump only uses the pneumatic source to control the piston to reciprocate without matching with an electromagnetic valve, and solves the problem that the traditional pneumatic pump with the electromagnetic valve is relatively complex in structure and high in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to a liquid output pump, in particular to a pneumatic liquid output pump. Background Art

[0002] A pump is a mechanical device used to transport fluid from one place to another. Depending on the power that drives the pump, it can be divided into electric pumps, hydraulic pumps, pneumatic pumps, wind pumps, human pumps, etc.

[0003] Compared with other types of pumps, pneumatic pumps have the advantages of simple structure, safe use, adjustable flow (by adjusting the air compressor), etc. The working principle of pneumatic pumps is to use compressed air to form a pressure difference in the pump chamber, thereby transporting fluid from one place to another.

[0004] However, pneumatic pumps often need to be used in conjunction with solenoid valves to adjust the reciprocating speed of the pneumatic pump and the pressure of the output fluid. However, pneumatic pumps generally have a relatively complex structure, resulting in high manufacturing costs.

[0005] In addition, when the fluid of the pneumatic pump in the prior art cannot be replenished in time, the piston will not stop operating but continue to reciprocate, thereby causing dry grinding and heat generation of the internal structure, resulting in damage to the pneumatic pump. Utility Model Content

[0006] In view of the fact that in the prior art, pneumatic pumps need to be used in conjunction with solenoid valves, there is a common problem of relatively complex structures leading to high manufacturing costs. In addition, when the fluid of the pneumatic pump in the prior art is not replenished in time, the piston will not stop operating but continue to reciprocate, which will cause dry grinding and heat generation of the internal structure, resulting in damage to the pneumatic pump.

[0007] Therefore, the main purpose of the present invention is to provide a pneumatic liquid output pump, which controls the piston by utilizing two air pressure sources so that the piston maintains reciprocating motion to output liquid, and adjusts the reciprocating motion rate of the pneumatic liquid output pump and the pressure of the output liquid by adjusting the pressure of each air pressure source, thereby solving the above-mentioned problems without the need for use with a solenoid valve.

[0008] In addition, the utility model can set an anti-dry run valve between the discharge channel and the air pressure source. When it is detected that the liquid cannot be replenished in time, the air pressure source is prohibited from conveying gas into the pneumatic liquid output pump and the pneumatic liquid output pump is prohibited from operating, so as to prevent the piston from generating heat due to dry grinding and causing damage to the pneumatic liquid output pump.

[0009] On the above basis, the necessary technical means adopted by the utility model to solve the problems of the prior art is to provide a pneumatic liquid output pump (hereinafter referred to as "pneumatic pump"), which is connected to a first air pressure source, a second air pressure source and a liquid supply source, so as to pressurize and output a working liquid provided by the liquid supply source, and includes a pump body, a first piston and a second piston.

[0010] The pump body is provided with a first working chamber, a second working chamber, a first gas channel, a second gas channel, a third gas channel, a fourth gas channel and a liquid working chamber. The first working chamber is connected to the first air pressure source and the second air pressure source. The second working chamber is independently provided outside the first working chamber and extends a first exhaust channel.

[0011] The first gas channel is connected to the first working chamber and the second working chamber. The second gas channel is connected to the first working chamber and the second working chamber. The third gas channel is connected to the first working chamber and the second working chamber. The fourth gas channel is connected to the first working chamber and the second working chamber. The liquid working chamber is connected to the liquid supply source.

[0012] The first piston is movably arranged in the first working chamber in a first piston stroke formed between a first piston position and a second piston position, so that the first gas channel, the second gas channel, the third gas channel and the fourth gas channel remain isolated from each other in the first working chamber.

[0013] When the first piston is at the first piston position, the first gas channel and the third gas channel are shielded, so that the first air pressure source and the second air pressure source remain connected to the second gas channel and the fourth gas channel respectively, so that a first working gas and a second working gas provided by the first air pressure source and the second air pressure source are respectively delivered to the second working chamber via the second gas channel and the fourth gas channel.

[0014] When the first piston is at the second piston position, the second gas channel and the fourth gas channel are shielded, the second air pressure source is blocked, and the first air pressure source remains connected to the third gas channel, so that the working gas provided by the first air pressure source is transported to the second working chamber via the third gas channel, and the first gas channel remains connected to the second working chamber.

[0015] The second piston is movably arranged in the second working chamber in a second piston stroke formed between a third piston position and a fourth piston position, so that the first gas channel, the second gas channel and the third gas channel remain isolated from each other in the second working chamber, and the second gas channel, the third gas channel and the fourth gas channel remain isolated from each other in the second working chamber.

[0016] When the second piston is at the third piston position, the first exhaust channel is blocked and the third gas channel is shielded, so that the second working chamber is connected to the first working chamber via the first gas channel, the second gas channel and the fourth gas channel respectively, and the first gas channel and the fourth gas channel are connected to each other in the second working chamber.

[0017] When the second piston is at the fourth piston position, the second gas channel, the third gas channel and the fourth gas channel are shielded, so that the second working chamber remains connected to the first working chamber via the third gas channel, the first gas channel and the fourth gas channel are isolated from each other in the second working chamber, and the first working chamber is connected to the first exhaust channel via the first gas channel.

[0018] When the second piston is located at the third piston position, negative pressure is generated in the liquid working chamber to absorb working liquid from the liquid supply source. When the second piston is located at the fourth piston position, the second piston extends into the liquid working chamber to pressurize and output the absorbed working liquid.

[0019] Among the subsidiary technical means derived from the above necessary technical means, preferably, the pump body can also be provided with a second exhaust channel, a third exhaust channel, a pressure relief exhaust channel, a liquid suction channel and a liquid discharge channel. The second exhaust channel is connected to the first working chamber to allow the first working gas and the second working gas to be discharged from the first working chamber. The third exhaust channel is connected to the first exhaust channel to assist the first exhaust channel in exhausting.

[0020] The pressure relief exhaust passage is connected to the second working chamber and the liquid working chamber, and is used to discharge a residual gas generated by the second working chamber from the second working chamber, and is used to discharge a residual water vapor generated by the liquid working chamber from the liquid working chamber. The liquid suction passage is connected to the liquid working chamber, and is used to allow the liquid working chamber to absorb working liquid from the liquid supply source. The liquid discharge passage is connected to the liquid working chamber, and is used to pressurize and output the absorbed working liquid when the second piston extends into the liquid working chamber.

[0021] Preferably, the pneumatic pump may further include a liquid suction filter and an exhaust filter. The liquid suction filter is disposed in the liquid suction channel to filter the working liquid flowing from the liquid supply source into the liquid working chamber. The exhaust filter is disposed in the second exhaust channel to filter the first working gas and the second working gas exhausted from the first working chamber.

[0022] Preferably, the pneumatic pump may further include a suction check valve and a discharge check valve. The suction check valve is disposed in the suction channel adjacent to the liquid working chamber to prevent the working liquid from flowing back from the liquid working chamber to the liquid supply source. The discharge check valve is disposed in the discharge channel adjacent to the liquid working chamber to prevent the working liquid from flowing back from the liquid output channel to the liquid working chamber.

[0023] Preferably, the pump body may include a first pump body, a second pump body and a third pump body. The first pump body is provided with a first working chamber, a first exhaust channel, a second exhaust channel, a third exhaust channel, a first gas channel, a gas output section of the second gas channel, a third gas channel and a fourth gas channel. The second pump body is fixedly connected to the first pump body, and is provided with a second working chamber, a gas input section connected to the gas output section and a pressure relief exhaust channel. The third pump body is fixedly connected to the second pump body, and is provided with a liquid working chamber, a liquid infusion channel and a liquid discharge channel. As mentioned above, the first pump body, the second pump body and the third pump body are all rectangular parallelepipeds.

[0024] Next, the pneumatic pump may further include a gas channel seal, a first pump body seal and a second pump body seal. The gas channel seal is disposed between the gas output section and the gas input section to prevent the first working gas from escaping from the junction between the first pump body and the second pump body. The first pump body seal is disposed between the first pump body and the second pump body to prevent the first working gas from escaping from the second working chamber. The second pump body seal is disposed between the second pump body and the third pump body to prevent the working liquid from flowing out of the liquid working chamber.

[0025] Preferably, the pneumatic pump may further include an anti-aircraft valve, which is fixed to the pump body and includes a valve body, a third piston and a spring. The valve body defines a third working chamber and a fifth gas channel. The third working chamber is connected to the discharge channel and the first air pressure source. The fifth gas channel is connected to the first working chamber and the third working chamber.

[0026] The third piston is movably arranged in the third working chamber in a third piston stroke formed between a fifth piston position and a sixth piston position, so that the discharge channel and the fifth gas channel are kept isolated from each other, and the discharge channel and the first gas pressure source are kept isolated from each other. The spring is arranged between the third piston and the valve body.

[0027] When the working liquid flows into the third working chamber from the discharge channel, the third piston is squeezed by the working liquid and moves to the sixth piston position, and the first air pressure source and the fifth gas channel remain connected to the third working chamber, so as to allow the first working gas to flow from the first air pressure source into the first working chamber, thereby allowing the pneumatic liquid output pump to keep outputting the working liquid.

[0028] When the working liquid stops flowing from the discharge channel into the third working chamber, the third piston is acted upon by the spring to return from the sixth piston position to the fifth piston position, shielding the discharge channel and the fifth gas channel, and isolating the first air pressure source and the fifth gas channel from each other in the third working chamber, so as to prohibit the first working gas from flowing from the first air pressure source into the first working chamber, thereby prohibiting the pneumatic liquid output pump from continuing to operate and preventing dry striking.

[0029] Preferably, the second piston may include a piston rod, an air chamber piston and a liquid chamber piston. The piston rod is movably disposed in the second working chamber in the second piston stroke formed between the third piston position and the fourth piston position, and is provided with a connecting annular groove. The air chamber piston is located in the second working chamber and is fixed to the piston rod so that the second gas channel and the third gas channel are kept isolated from each other in the second working chamber.

[0030] The liquid chamber piston is located in the liquid working chamber and is fixed to the piston rod, so that when the piston rod is located at the third piston position, the liquid working chamber generates negative pressure to absorb the working liquid, and when the piston rod is located at the fourth piston position, the working liquid is pressurized and output.

[0031] As mentioned above, the pneumatic pump may further include a shuttle seal, an air chamber seal and a liquid chamber seal. The shuttle seal is covered and fixed on the first piston to keep the first gas channel, the second gas channel, the third gas channel and the fourth gas channel isolated from each other in the first working chamber. The air chamber seal is covered and fixed on the air chamber piston to keep the second gas channel and the third gas channel isolated from each other in the second working chamber. The liquid chamber seal is covered and fixed on the liquid chamber piston to prevent the working liquid from flowing out of the liquid working chamber.

[0032] Preferably, the pneumatic pump may further include a shuttle sleeve, an air chamber bushing and a liquid chamber bushing. The shuttle sleeve is disposed in the first working chamber to cover the first piston, thereby preventing the first piston from wearing the pump body during reciprocating operation. The air chamber bushing is disposed in the second working chamber to cover the air chamber piston, thereby preventing the air chamber piston from wearing the pump body during operation. The liquid chamber bushing is disposed in the liquid working chamber to cover the liquid chamber piston, thereby preventing the liquid chamber piston from wearing the pump body during operation.

[0033] Preferably, the pump body may have a mounting bottom side, and a plurality of slide rails are provided on the mounting bottom side. The pneumatic pump may further include a plurality of support bases, and the support bases may be slidably disposed on the slide rails to support the pneumatic pump.

[0034] As mentioned above, the support base includes a slider and a support screw. The slider is slidably disposed on the slide rail and has an adjustment screw hole. The support screw is locked in the adjustment screw hole to support the pneumatic pump.

[0035] In summary, the pneumatic liquid output pump provided by the utility model controls the piston by utilizing two air pressure sources so that the piston maintains a reciprocating motion to output liquid, and adjusts the reciprocating motion rate of the pneumatic liquid output pump and the pressure of the output liquid by adjusting the pressure of each air pressure source, thereby solving the problem of high manufacturing cost without the need for use with a solenoid valve.

[0036] In addition, by setting an anti-dry running valve between the discharge channel and the first air pressure source, when it is detected that the working fluid cannot be replenished in time, the first air pressure source is prohibited from delivering the first working gas into the pneumatic pump and the pneumatic pump is prohibited from operating, so as to prevent the piston (including the first piston and the second piston) from dry grinding and generating heat, causing damage to the pneumatic pump.

[0037] The specific embodiments adopted by the present utility model will be further described through the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A three-dimensional schematic diagram showing a pneumatic liquid delivery pump according to a first embodiment of the present invention;

[0039] Figure 2 A perspective exploded schematic diagram showing a pneumatic liquid delivery pump according to a first embodiment of the present invention;

[0040] Figure 3 A schematic three-dimensional diagram showing the internal piping of a pneumatic liquid delivery pump according to a first embodiment of the utility model;

[0041] Figure 4 A schematic side view showing the internal piping of the pneumatic liquid delivery pump of the first embodiment of the utility model;

[0042] Figure 5 A bottom perspective view showing a pneumatic liquid delivery pump according to a first embodiment of the present invention;

[0043] Figure 6 show Figure 1 A cross-sectional schematic diagram of the first piston being located at a first position after cutting along the AA section;

[0044] Figure 7 A cross-sectional schematic diagram showing the first piston of the first embodiment of the utility model being located at the second position;

[0045] Figure 8 show Figure 1 A schematic cross-sectional view of the second piston being located at the third position after cutting along the BB section;

[0046] Fig. 9 A cross-sectional schematic diagram showing the second piston of the first embodiment of the utility model is located at a fourth position;

[0047] Fig.10 A gas circuit diagram showing that the first piston of the first embodiment of the utility model is located at the second position, and the second piston is driven to move to the fourth position;

[0048] Fig.11 A gas circuit diagram showing that the first piston of the first embodiment of the present invention is located at the first position, and the second piston is driven to move to the third position;

[0049] Fig.12 A perspective view showing a pneumatic liquid delivery pump according to a second embodiment of the present invention;

[0050] Fig.13 show Fig.12 A cross-sectional schematic diagram of the third piston being located at a sixth position after cutting along CC; and

[0051] Fig.14 It is a cross-sectional schematic diagram showing the third piston of the second embodiment of the present invention located at the fifth position.

[0052] Description of Figure Numbers

[0053] 100: Pneumatic pump

[0054] 200: First air pressure source

[0055] 300: Second air pressure source

[0056] 400:Liquid supply source

[0057] 1: Pump body

[0058] 11: First pump body

[0059] 12: Second pump body

[0060] 13: The third pump body

[0061] 2: First piston

[0062] 3: Second piston

[0063] 31: Piston rod

[0064] 32: Air chamber piston

[0065] 33: Liquid chamber piston

[0066] 4: Anti-return device

[0067] 41: Suction check valve

[0068] 42: Discharge check valve

[0069] 5: Filtration device

[0070] 51: Liquid suction filter

[0071] 52: Exhaust filter

[0072] 6: Sealing device

[0073] 61: Gas channel seal

[0074] 62: First pump body seal

[0075] 63: Second pump body seal

[0076] 64: Shuttle seal

[0077] 65: Air chamber seal

[0078] 66: Liquid chamber seal

[0079] 7: Anti-wear device

[0080] 71: Shuttle Bushing

[0081] 72: Air chamber bushing

[0082] 73: Liquid chamber bushing

[0083] 8: Support base

[0084] 81: Slider

[0085] 82:Support screw

[0086] 9: Anti-air valve

[0087] 91: Valve body

[0088] 92: Third piston

[0089] 93: Spring

[0090] WF: Working fluid

[0091] RM: Residual moisture

[0092] RA: Residual gas

[0093] WA1: First working gas

[0094] WA2: Second working gas

[0095] WC1: First working chamber

[0096] WC2: Second working chamber

[0097] WC3: The third working chamber

[0098] FWC: Liquid Working Chamber

[0099] EP1: First exhaust channel

[0100] EP2: Second exhaust channel

[0101] EP3: Third exhaust channel

[0102] AP1: First gas channel

[0103] AP2: Second gas channel

[0104] AP3: Third gas channel

[0105] AP4: Fourth Gas Channel

[0106] AP5: Fifth Gas Channel

[0107] REP: Relief Exhaust Passage

[0108] IP: aspiration channel

[0109] OP: drain channel

[0110] OS: Gas output section

[0111] IS: Gas input section

[0112] PP1: First piston position

[0113] PP2: Second piston position

[0114] PP3: Third piston position

[0115] PP4: Fourth piston position

[0116] PP5: Fifth piston position

[0117] PP6: Sixth piston position

[0118] PS1: First piston stroke

[0119] PS2: Second piston stroke

[0120] PS3: The third piston is in the stroke

[0121] CG: Connecting ring groove

[0122] IBS: Installation bottom side

[0123] SR: Slide rail

[0124] AH: Adjustment screw hole DETAILED DESCRIPTION

[0125] The utility model provides a pneumatic liquid delivery pump, and its combinations and variations are numerous. Here, only two preferred embodiments are listed for specific description.

[0126] See also Figures 1 to 4 , Figure 1 A three-dimensional schematic diagram showing a pneumatic liquid delivery pump according to a first embodiment of the present invention; Figure 2 A perspective exploded schematic diagram showing a pneumatic liquid delivery pump according to a first embodiment of the present invention; Figure 3 A schematic three-dimensional diagram showing the internal piping of the pneumatic liquid delivery pump according to the first embodiment of the present invention; and Figure 4A schematic side view showing the internal piping of a pneumatic liquid delivery pump according to a first embodiment of the present invention.

[0127] like Figures 1 to 4 As shown, in the first embodiment of the utility model, a pneumatic liquid output pump (hereinafter referred to as "pneumatic pump") 100 is connected to a first air pressure source 200, a second air pressure source 300 and a liquid supply source 400, so as to pressurize and output a working liquid WF provided by the liquid supply source 400. The first air pressure source 200 provides a first working gas WA1. The second air pressure source 300 provides a second working gas WA2. In the first embodiment, the above-mentioned air pressure sources are all air compressors.

[0128] The pneumatic pump 100 comprises a pump body 1 , a first piston 2 , a second piston 3 , a non-return device 4 , a filter device 5 , a sealing device 6 and an anti-wear device 7 .

[0129] In the first embodiment, the pump body 1 is composed of a first pump body 11, a second pump body 12 and a third pump body 13. The first pump body 11 is provided with a first working chamber WC1, a first exhaust passage EP1, a second exhaust passage EP2, a third exhaust passage EP3, a first gas passage AP1, a gas output section OS of the second gas passage AP2, a third gas passage AP3 and a fourth gas passage AP4.

[0130] The second pump body 12 is fixedly connected to the first pump body 11, and defines a second working chamber WC2, a gas input section IS of the second gas channel AP2, and a pressure relief exhaust channel REP. The third pump body 13 is fixedly connected to the second pump body 12, and defines a liquid working chamber FWC, a liquid suction channel IP, and a liquid discharge channel OP.

[0131] The first pump body 11, the second pump body 12 and the third pump body 13 respectively have at least one assembly surface, and have at least one assembly coplanar surface when assembled into the pump body 1. If the assembly coplanar surface is the bottom surface of the pneumatic pump 100, the pneumatic pump 100 can be placed stably on the ground. If the assembly coplanar surface is the side surface of the pneumatic pump 100, the pneumatic pump 100 can be set against the wall to save installation space.

[0132] In the first embodiment, the first pump body 11, the second pump body 12 and the third pump body 13 are all rectangular parallelepiped. Compared with other common pumps on the market, the utility model directly processes and opens a channel for fluid to pass through the rectangular parallelepiped pump body (including the first pump body 11, the second pump body 12 and the third pump body 13) instead of connecting through a physical pipeline (such as a water pipe or an air pipe), that is, it can avoid the physical pipeline being exposed to the outside and causing collision damage. In addition, the coplanar rectangular parallelepiped design can also easily set the pneumatic pump 100 against the wall.

[0133] The first working chamber WC1 is connected to the first air pressure source 200 and the second air pressure source 300. The second working chamber WC2 is opened independently of the first working chamber WC1 and extends out a first exhaust passage EP1.

[0134] The first gas channel AP1 is connected to the first working chamber WC1 and the second working chamber WC2. The second gas channel AP2 is connected to the first working chamber WC1 and the second working chamber WC2. The third gas channel AP3 is connected to the first working chamber WC1 and the second working chamber WC2. The fourth gas channel AP4 is connected to the first working chamber WC1 and the second working chamber WC2.

[0135] The second exhaust channel EP2 is connected to the first working chamber WC1 to allow the first working gas WA1 and the second working gas WA2 to be discharged from the first working chamber WC1. The second exhaust channel EP2 includes a gas output section OS and a gas input section IS connected to the gas output section OS, and is respectively opened in the first pump body 11 and the second pump body 12. The third exhaust channel EP3 is connected to the first gas channel AP1 to assist the exhaust of the first gas channel AP1.

[0136] The pressure relief exhaust passage REP is connected to the second working chamber WC2 and the liquid working chamber FWC, and is used to discharge a residual gas RA generated by the second working chamber WC2 from the second working chamber WC2, and to discharge a residual water vapor RM generated by the liquid working chamber FWC from the liquid working chamber FWC. In the first embodiment, a total of three pressure relief exhaust passages (only one of the pressure relief exhaust passages REP is marked), corresponding to the two sides and the bottom side of the pneumatic pump 100, respectively, and according to different assembly angles, the pressure relief exhaust passage REP closest to the ground is opened to ensure that the residual gas RA and the residual water vapor RM can be discharged.

[0137] The liquid working chamber FWC is connected to the liquid supply source 400. The liquid suction channel IP is connected to the liquid working chamber FWC, and is used for the liquid working chamber FWC to suck the working liquid WF from the liquid supply source 400. The liquid discharge channel OP is connected to the liquid working chamber FWC, and is used for the sucked working liquid WF to be pressurized and output when the first piston 2 extends into the liquid working chamber FWC.

[0138] The first piston 2 is movably disposed in the first working chamber WC1 in a first piston stroke PS1 formed between a first piston position PP1 and a second piston position PP2, so that the first gas channel AP1, the second gas channel AP2, the third gas channel AP3 and the fourth gas channel AP4 remain isolated from each other in the first working chamber WC1.

[0139] The second piston 3 is movably arranged in the second working chamber WC2 in a second piston stroke PS2 formed between a third piston position PP3 and a fourth piston position PP4, so that the first gas channel AP1, the second gas channel AP2 and the third gas channel AP3 remain isolated from each other in the second working chamber WC2, and the second gas channel AP2, the third gas channel AP3 and the fourth gas channel AP4 remain isolated from each other in the second working chamber WC2.

[0140] The second piston 3 includes a piston rod 31, an air chamber piston 32 and a liquid chamber piston 33. The piston rod 31 is movably arranged in the second working chamber WC2 in the second piston stroke PS2 formed between the third piston position PP3 and the fourth piston position PP4, and a connecting ring groove CG is provided. The air chamber piston 32 is located in the second working chamber WC2 and is fixed to the piston rod 31 to keep the second gas passage AP2 and the third gas passage AP3 isolated from each other in the second working chamber WC2.

[0141] The liquid chamber piston 33 is located in the liquid working chamber FWC and is fixed to the piston rod 31. It is used to generate negative pressure in the liquid working chamber FWC to absorb the working fluid WF when the piston rod 31 is located at the third piston position PP3, and to pressurize and output the working fluid WF when the piston rod 31 is located at the fourth piston position PP4.

[0142] The check valve 4 includes a liquid suction check valve 41 and a liquid discharge check valve 42. The liquid suction check valve 41 is disposed in the liquid suction passage IP adjacent to the liquid working chamber FWC to prevent the working liquid WF from flowing back from the liquid working chamber FWC to the liquid supply source 400. The liquid discharge check valve 42 is disposed in the liquid discharge passage OP adjacent to the liquid working chamber FWC to prevent the working liquid WF from flowing back from the liquid discharge passage OP to the liquid working chamber FWC. The structure and working principle of the check valve are the same as those in the prior art and will not be described in detail in the first embodiment.

[0143] The filter device 5 includes a liquid suction filter 51 and an exhaust filter 52. The liquid suction filter 51 is disposed in the liquid suction channel IP to filter the working liquid WF flowing into the liquid working chamber FWC from the liquid supply source 400. The exhaust filter 52 is disposed in the second exhaust channel EP2 to filter the first working gas WA1 and the second working gas WA2 exhausted from the first working chamber WC1.

[0144] The sealing device 6 comprises a gas channel seal 61, a first pump body seal 62, a second pump body seal 63, a shuttle seal 64, an air chamber seal 65 and a liquid chamber seal 66. The gas channel seal 61 is disposed between the gas output section OS and the gas input section IS to prevent the first working gas WA1 from escaping from the interface between the first pump body 11 and the second pump body 12.

[0145] The first pump body seal 62 is disposed between the first pump body 11 and the second pump body 12 to prevent the first working gas WA1 from escaping from the second working chamber WC2. The second pump body seal 63 is disposed between the second pump body 12 and the third pump body 13 to prevent the working liquid WF from flowing out of the liquid working chamber FWC.

[0146] In the first embodiment, a plurality of shuttle seals are included, and only one of the shuttle seals 64 is indicated. The shuttle seal 64 is covered and fixed on the first piston 2 to keep the first gas channel AP1, the second gas channel AP2, the third gas channel AP3 and the fourth gas channel AP4 isolated from each other in the first working chamber WC1. The air chamber seal 65 is covered and fixed on the air chamber piston 32 to keep the second gas channel AP2 and the third gas channel AP3 isolated from each other in the second working chamber WC2. The liquid chamber seal 66 is covered and fixed on the liquid chamber piston 33 to prevent the working fluid WF from flowing out of the liquid working chamber FWC. In the first embodiment, the seal may be a silicone ring or a rubber ring to fill the gap between components to prevent the fluid from flowing through.

[0147] The anti-wear device 7 includes a shuttle sleeve 71, an air chamber bushing 72 and a liquid chamber bushing 73. The shuttle sleeve 71 is disposed in the first working chamber WC1 to cover the first piston 2, thereby preventing the first piston 2 from wearing the pump body 1 during operation. The air chamber bushing 72 is disposed in the second working chamber WC2 to cover the air chamber piston 32, thereby preventing the air chamber piston 32 from wearing the pump body 1 during operation. The liquid chamber bushing 73 is disposed in the liquid working chamber FWC to cover the liquid chamber piston 32, thereby preventing the liquid chamber piston 32 from wearing the pump body 1 during operation.

[0148] Please continue reading Figure 5 , Figure 5 A bottom perspective view of a pneumatic liquid delivery pump according to a first embodiment of the present invention is shown. Figure 5 As shown, in order to stably place the pneumatic pump 100 on various types of ground, the pump body 1 has an installation bottom side IBS, and a plurality of slide rails are provided on the installation bottom side IBS (in Figure 5 Only one of the slide rails SR is indicated in the figure), the pneumatic pump 100 also includes a plurality of support bases (in Figure 5Only one of the support bases 8 is indicated in the figure. The support base 8 is slidably disposed on the slide rail SR to support the pneumatic pump 100, and includes a slider 81 and a support screw 82. The slider 81 is slidably disposed on the slide rail SR and has an adjustment screw hole AH. The support screw 82 is locked in the adjustment screw hole AH to support the pneumatic pump 100.

[0149] After assembling the support base 8, the support screw 82 can be rotated according to the height fluctuation of the ground. The height of the pneumatic pump 100 from the ground can be adjusted by adjusting the number of threads of the support screw 82 locked into the adjusting screw hole AH (not shown), so that the pneumatic pump 100 can remain stable after setting and will not be affected by the height fluctuation of the ground.

[0150] Please continue reading Figures 6 to 11 , Figure 6 show Figure 1 A cross-sectional schematic diagram of the first piston being located at a first position after cutting along the AA section; Figure 7 A cross-sectional schematic diagram showing the first piston of the first embodiment of the utility model being located at the second position; Figure 8 show Figure 1 A schematic cross-sectional view of the second piston being located at the third position after cutting along the BB section; Fig. 9 A cross-sectional schematic diagram showing the second piston of the first embodiment of the utility model is located at a fourth position; Fig.10 A gas circuit diagram showing that the first piston of the first embodiment of the present invention is located at the second position, and the second piston is driven to move to the fourth position; and Fig.11 The gas circuit diagram shows that the first piston of the first embodiment of the present invention is located at the first position, and the second piston is driven to move to the third position.

[0151] like Figures 6 to 11 As shown, when the first piston 2 is located at the first piston position PP1, the first gas channel AP1 and the third gas channel AP3 are shielded, so that the first gas pressure source 200 and the second gas pressure source 300 remain connected to the second gas channel AP2 and the fourth gas channel AP4, respectively, so that the first working gas WA1 and the second working gas WA2 are delivered to the second working chamber WC2 via the second gas channel AP2 and the fourth gas channel AP4, respectively.

[0152] When the first piston 2 is located at the second piston position PP2, the second gas channel AP2 and the fourth gas channel AP4 are shielded, the second gas pressure source 300 is blocked, and the first gas pressure source 200 remains connected to the third gas channel AP3, so that the first working gas WA1 provided by the first gas pressure source 200 is delivered to the second working chamber WC2 via the third gas channel AP3.

[0153] When the second piston 3 is located at the third piston position PP3, the first exhaust channel EP1 is blocked and the third gas channel AP3 is shielded, so that the second working chamber WC2 is connected to the first working chamber WC1 via the first gas channel AP1, the second gas channel AP2 and the fourth gas channel AP4 respectively, and the first gas channel AP1 and the fourth gas channel AP4 are connected to each other in the second working chamber WC2 through the connecting ring groove CG, and a negative pressure is generated in the liquid working chamber FWC to absorb the working liquid WF from the liquid supply source 400.

[0154] When the second piston 3 is located at the fourth piston position PP4, the second gas passage AP2, the third gas passage AP3 and the fourth gas passage AP4 are shielded, so that the second working chamber WC2 is connected to the first working chamber WC1 via the third gas passage AP3, the first gas passage AP1 and the fourth gas passage AP4 are isolated from each other in the second working chamber WC2, and the first working chamber WC1 is connected to the first exhaust passage EP1 via the first gas passage AP1. When the second piston 3 is located at the fourth piston position PP4, it extends into the liquid working chamber FWC to pressurize and output the sucked working liquid WF.

[0155] When the pneumatic pump 100 is connected to the first air pressure source 200 and the second air pressure source 300 and the first piston 2 is located at the first piston position PP1, the first working gas WA1 flows into the second working chamber WC2 through the first working chamber WC1 and the second gas channel AP2 in sequence, and moves the second piston 3 to the third piston position PP3.

[0156] At this time, the first gas channel AP1 and the fourth gas channel AP4 remain connected to each other in the second working chamber WC2 through the connecting ring groove CG, so that the second working gas WA2 can flow back to the first working chamber WC1 after passing through the first working chamber WC1 and the second working chamber WC2 in sequence, and push the first piston 2 from the first piston position PP1 to the second piston position PP2.

[0157] When the pneumatic pump 100 is connected to the first air pressure source 200 and the second air pressure source 300 and the first piston 2 is pushed to the second piston position PP2, the first working gas WA1 flows into the second working chamber WC2 through the first working chamber WC1 and the third gas channel AP3 in sequence, and causes the second piston 3 to return from the third piston position PP3 to the fourth piston position PP4.

[0158] At this time, the first gas channel AP1 is connected to the first exhaust channel EP1, and the second working gas WA2 flows from the first working chamber WC1 to the first exhaust channel EP1, so that the first piston 2 returns from the second piston position PP2 to the first piston position PP1 due to the air pressure difference, completing a working cycle of the pneumatic pump 100.

[0159] As described above, in the above working cycle, the second piston 3 is driven to the third piston position PP3 and the fourth piston position PP4 to absorb the working fluid WF from the fluid supply source 400 and output it under pressure. In addition, the output pressure of the working fluid WF and the reciprocating speed of the first piston 2 can be adjusted respectively by adjusting the driving gas pressures of the first working gas WA1 and the second working gas WA2.

[0160] Please continue reading Figure 12 to Figure 14 , Fig.12 A perspective view showing a pneumatic liquid delivery pump according to a second embodiment of the present invention; Fig.13 show Fig.12 A cross-sectional schematic diagram of the third piston being located at a sixth position after cutting along CC; and Fig.14 It is a cross-sectional schematic diagram showing the third piston of the second embodiment of the present invention located at the fifth position.

[0161] like Figure 12 to Figure 14 As shown, in the second embodiment, the pneumatic pump 100 further includes an anti-dry run valve 9. The structure and working principle of the pneumatic pump 100 described in the second embodiment are consistent with those of the pneumatic pump 100 described in the first embodiment, which will not be described in detail here. Please refer to the corresponding paragraphs in the first embodiment above.

[0162] The anti-air strike valve 9 includes a valve body 91, a third piston 92 and a spring 93. The valve body 91 defines a third working chamber WC3 and a fifth gas passage AP5. The third working chamber WC3 is connected to the discharge passage OP and the first air pressure source 200. The fifth gas passage AP5 is connected to the first working chamber WC1 and the third working chamber WC3.

[0163] The third piston 92 is movably disposed in the third working chamber WC3 in a third piston stroke PS3 formed by a fifth piston position PP5 and a sixth piston position PP6, so that the discharge passage OP and the fifth gas passage AP5 are kept isolated from each other, and the discharge passage OP and the first gas pressure source 200 are kept isolated from each other. The spring 93 is disposed between the third piston 92 and the valve body 91.

[0164] When the pneumatic pump 100 is started and the pneumatic pump 100 outputs the working fluid WF normally, the working fluid WF flows from the discharge channel OP into the third working chamber WC3, and the third piston 92 is squeezed by the working fluid WF and moves to the sixth piston position PP6, and the first air pressure source 200 and the fifth gas channel AP5 remain connected to the third working chamber WC3, so as to allow the first working gas WA1 to continue to flow from the first air pressure source 200 through the fifth gas channel AP5 into the first working chamber WC1, thereby allowing the pneumatic pump 100 to keep operating and continuously output the working fluid WF.

[0165] When the pneumatic pump 100 is started but the working fluid WF cannot be replenished, the working fluid WF stops flowing into the third working chamber WC3. At this time, the third piston 92 is acted upon by the spring 93 and returns from the sixth piston position PP6 to the fifth piston position PP5, shielding the discharge channel OP and the fifth gas channel AP5, and isolating the first air pressure source 200 and the fifth gas channel AP5 from each other in the third working chamber WC3, so as to prohibit the first working gas WA1 from flowing from the first air pressure source 200 along the fifth gas channel AP5 into the first working chamber WC1, thereby prohibiting the pneumatic pump 100 from continuing to operate and preventing dry striking.

[0166] In summary, the pneumatic liquid output pump 100 provided by the present invention controls the piston (including the first piston 2 and the second piston 3) by utilizing two air pressure sources (including the first air pressure source 200 and the second air pressure source 300) to keep the piston in reciprocating motion to output the working fluid WF, and adjusts the reciprocating motion rate of the pneumatic liquid output pump 100 and the pressure of the output liquid by adjusting the pressure of each air pressure source, thereby solving the problem of high manufacturing cost without the need for use with a solenoid valve.

[0167] In addition, by providing an anti-dry running valve 9 between the discharge channel OP and the first air pressure source 200, when it is detected that the working fluid WF cannot be replenished in time, the first air pressure source 200 is prohibited from delivering the first working gas WA1 into the pneumatic pump 100 and the pneumatic pump 100 is prohibited from operating, so as to prevent the piston (including the first piston 2 and the second piston 3) from dry grinding and generating heat, thereby causing damage to the pneumatic pump 100.

[0168] Through the detailed description of the preferred embodiments above, it is hoped that the features and spirit of the present invention can be more clearly described, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, its purpose is to cover various changes and arrangements with equivalents within the scope of the claims to be applied for the present invention.

Claims

1. A pneumatic liquid output pump connected to a first air pressure source, a second air pressure source and a liquid supply source, so as to pressurize and output the working liquid provided by the liquid supply source, wherein the pneumatic liquid output pump is characterized in that: Include︰ Pump body, opening: A first working chamber connected to the first air pressure source and the second air pressure source; A second working chamber is opened independently of the first working chamber and extends a first exhaust passage; a first gas channel connected to the first working chamber and the second working chamber; a second gas channel connected to the first working chamber and the second working chamber; a third gas channel connected to the first working chamber and the second working chamber; a fourth gas channel connected to the first working chamber and the second working chamber; as well as A liquid working chamber connected to the liquid supply source; a first piston, which is movably arranged in the first working chamber in a first piston stroke formed between a first piston position and a second piston position, so that the first gas channel, the second gas channel, the third gas channel and the fourth gas channel are kept isolated from each other in the first working chamber, and is used to shield the first gas channel and the third gas channel when the first piston is located at the first piston position, so that the first air pressure source and the second air pressure source are kept connected to the second gas channel and the fourth gas channel respectively, so that the first working gas and the second working gas provided by the first air pressure source and the second air pressure source are respectively delivered to the second working chamber via the second gas channel and the fourth gas channel, and is used to shield the second gas channel and the fourth gas channel when the first piston is located at the second piston position, block the second air pressure source, so that the first air pressure source is kept connected to the third gas channel, so that the first working gas provided by the first air pressure source is delivered to the second working chamber via the third gas channel, and the first gas channel is kept connected to the second working chamber; as well as a second piston, which is movably arranged in the second working chamber in a second piston stroke formed between a third piston position and a fourth piston position, so that the first gas channel, the second gas channel and the third gas channel are kept isolated from each other in the second working chamber, and the second gas channel, the third gas channel and the fourth gas channel are kept isolated from each other in the second working chamber, and is used to block the first exhaust channel and shield the third gas channel when the second piston is located at the third piston position, so that the second working chamber is kept in communication with the first working chamber via the first gas channel, the second gas channel and the fourth gas channel respectively, so that the first gas channel and the fourth gas channel are connected to each other in the second working chamber, and is used to shield the second gas channel, the third gas channel and the fourth gas channel when the second piston is located at the fourth piston position, so that the second working chamber is kept in communication with the first working chamber via the third gas channel, so that the first gas channel and the fourth gas channel are isolated from each other in the second working chamber, and the first working chamber is connected to the first exhaust channel via the first gas channel; When the second piston is located at the third piston position, negative pressure is generated in the liquid working chamber to absorb the working liquid from the liquid supply source. When the second piston is located at the fourth piston position, the second piston extends into the liquid working chamber to pressurize and output the absorbed working liquid.

2. The pneumatic liquid delivery pump according to claim 1, characterized in that: The pump body also provides: a second exhaust passage connected to the first working chamber for allowing the first working gas and the second working gas to be exhausted from the first working chamber; a third exhaust passage, connected to the first exhaust passage; a pressure relief exhaust passage connected to the second working chamber and the liquid working chamber, for allowing residual gas generated in the second working chamber to be discharged from the second working chamber, and for allowing residual water vapor generated in the liquid working chamber to be discharged from the liquid working chamber; a liquid suction channel connected to the liquid working chamber, for allowing the liquid working chamber to suck the working liquid from the liquid supply source; as well as The liquid discharge channel is connected to the liquid working chamber and is used for pressurizing and outputting the sucked working liquid when the second piston extends into the liquid working chamber.

3. The pneumatic liquid delivery pump according to claim 2, characterized in that: Also includes: A liquid suction filter, disposed in the liquid suction channel; and An exhaust filter is arranged in the second exhaust passage.

4. The pneumatic liquid delivery pump according to claim 2, characterized in that: Also includes: a liquid suction check valve, disposed in the liquid suction channel adjacent to the liquid working chamber; and A liquid discharge check valve is disposed in the liquid discharge passage adjacent to the liquid working chamber.

5. The pneumatic liquid delivery pump according to claim 2, characterized in that: The pump body comprises: A first pump body is provided with the first working chamber, the first exhaust channel, the second exhaust channel, the third exhaust channel, the first gas channel, the gas output section of the second gas channel, the third gas channel and the fourth gas channel; A second pump body is fixedly connected to the first pump body and is provided with the second working chamber, a gas input section connected to the gas output section and the pressure relief exhaust channel; as well as The third pump body is fixedly connected to the second pump body and is provided with the liquid working chamber, the liquid suction channel and the liquid discharge channel.

6. The pneumatic liquid delivery pump according to claim 5, characterized in that: The first pump body, the second pump body and the third pump body are all rectangular parallelepipeds.

7. The pneumatic liquid delivery pump according to claim 5, characterized in that: Also includes: A gas channel seal, disposed between the gas output section and the gas input section; A first pump body seal is disposed between the first pump body and the second pump body; and The second pump body sealing member is arranged between the second pump body and the third pump body.

8. The pneumatic liquid delivery pump according to claim 2, characterized in that: It also includes an anti-runaway valve, which is fixedly connected to the pump body and includes: Valve body, opening: A third working chamber connected to the liquid discharge channel and the first air pressure source; and a fifth gas channel connected to the first working chamber and the third working chamber; a third piston, movably disposed in the third working chamber in a third piston stroke formed between a fifth piston position and a sixth piston position, so that the liquid discharge channel and the fifth gas channel are kept isolated from each other, and the liquid discharge channel and the first gas pressure source are kept isolated from each other; and a spring, disposed between the third piston and the valve body; Among them, when the working liquid flows into the third working chamber from the drainage channel, the third piston is squeezed by the working liquid and moves to the sixth piston position, so that the first air pressure source and the fifth gas channel remain connected to the third working chamber, and the first working gas is allowed to flow from the first air pressure source into the first working chamber. When the working liquid stops flowing from the drainage channel into the third working chamber, the third piston is acted upon by a spring and returns from the sixth piston position to the fifth piston position, shielding the drainage channel and the fifth gas channel, so that the first air pressure source and the fifth gas channel are isolated from each other in the third working chamber, and the first working gas is prohibited from flowing from the first air pressure source into the first working chamber.

9. The pneumatic liquid delivery pump according to claim 1, characterized in that: The second piston comprises: a piston rod, movably disposed in the second working chamber in the second piston stroke formed between the third piston position and the fourth piston position, and having a communicating annular groove; A gas chamber piston, located in the second working chamber, fixed to the piston rod, and keeping the second gas channel and the third gas channel isolated from each other in the second working chamber; as well as The liquid chamber piston is located in the liquid working chamber and is fixedly connected to the piston rod. It is used to generate negative pressure in the liquid working chamber to absorb the working liquid when the piston rod is located at the third piston position, and is used to pressurize and output the working liquid when the piston rod is located at the fourth piston position.

10. The pneumatic liquid delivery pump according to claim 9, characterized in that: Also includes: a shuttle seal, covering and fixed to the first piston, so that the first gas channel, the second gas channel, the third gas channel and the fourth gas channel are kept isolated from each other in the first working chamber; an air chamber seal, covering and fixed to the air chamber piston, so that the second gas channel and the third gas channel are kept isolated from each other in the second working chamber; as well as The liquid chamber sealing member covers and is fixed to the liquid chamber piston.

11. The pneumatic liquid delivery pump according to claim 10, characterized in that: Also includes: A shuttle sleeve, disposed in the first working chamber, for covering the first piston; An air chamber bushing, disposed in the second working chamber, for covering the air chamber piston; as well as The liquid chamber bushing is arranged in the liquid working chamber and is used for covering the liquid chamber piston.

12. The pneumatic liquid delivery pump according to claim 1, characterized in that: The pump body has an installation bottom side, and a plurality of slide rails are provided on the installation bottom side. The pneumatic liquid output pump further comprises a plurality of support bases, and the plurality of support bases are slidably arranged on the plurality of slide rails.

13. The pneumatic liquid delivery pump according to claim 12, characterized in that: Each of the plurality of support bases comprises: A slider, slidably disposed on one of the plurality of slide rails and having an adjustment screw hole; and A supporting screw is locked in the adjusting screw hole.

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