Gas-driven hydraulic pump

Abstract

The utility model discloses a gas-driven hydraulic pump, which comprises a pump body provided with a suction inlet, a discharge port, a first chamber and a second chamber, the suction inlet and the discharge port are both communicated with the first chamber, the wall of the first chamber is provided with a notch, the discharge port is communicated with the first chamber through the notch, and the first chamber is communicated with the second chamber; the liquid inlet one-way valve is arranged at the suction inlet; the liquid outlet one-way valve is arranged at the discharge port; the piston is driven by air and can axially move in the second chamber; and the piston rod is connected with the piston and is driven by the piston to axially move in the first chamber and the second chamber. When the piston rod extends into the first cavity, the speed of fluid in the first cavity flowing to the exhaust port is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic pump, concretely is a kind of air-driven hydraulic pump. BACKGROUND

[0002] Air-driven hydraulic pump is a kind of compressed air driven power equipment, with compact structure, low cost characteristics, widely used in machine tool industry, oil and gas industry, chemical and petrochemical industry, national defense, mine, engineering machinery and aerospace fields.

[0003] The current air-driven hydraulic pump is generally driven by air piston to reciprocate in the second chamber, then the piston rod moves synchronously with the piston in the first chamber, the first chamber is provided with suction inlet and discharge outlet, the suction inlet is provided with suction check valve, the discharge outlet is provided with discharge check valve, the reciprocating movement of piston rod makes fluid continuously sucked into the first chamber from the suction inlet, then the fluid in the first chamber is continuously discharged through the discharge outlet, so as to achieve the purpose of conveying fluid.

[0004] However, the current air-driven hydraulic pump, when the piston rod extends into the first chamber to discharge the fluid in the first chamber through the discharge outlet, the fluid in the first chamber can only flow to the discharge outlet through the gap between the piston rod and the cavity wall of the first chamber, and the gap between the piston rod and the cavity wall of the first chamber is generally small, so that the speed of the fluid in the first chamber flowing to the discharge outlet is slow. SUMMARY

[0005] The present application provides an air-driven hydraulic pump, which makes the speed of the fluid in the first chamber flowing to the discharge outlet faster when the piston rod extends into the first chamber.

[0006] The air-driven hydraulic pump provided by the present application comprises:

[0007] The pump body has suction inlet, discharge outlet, first chamber and second chamber, the suction inlet and the discharge outlet are communicated with the first chamber, the cavity wall of the first chamber is provided with a slot, the discharge outlet is communicated with the first chamber through the slot, and the first chamber is communicated with the second chamber;

[0008] The inlet check valve is arranged in the suction inlet.

[0009] The outlet check valve is arranged in the discharge outlet.

[0010] The piston is driven by air and can move axially in the second chamber.

[0011] The piston rod is connected with the piston and moves axially in the first chamber and the second chamber driven by the piston.

[0012] Preferably, the slot extends along the axis direction of the first chamber.

[0013] Preferably, the pump body is provided with an air inlet, an air outlet, a first vent hole, a second vent hole and a third vent hole, and a valve core is slidably arranged in the pump body, the valve core is provided with a first vent groove and a second vent groove, the air inlet is connected with the first vent groove, the first vent hole is connected with a side of the second chamber away from the first chamber, the second vent hole is connected with the air outlet, and the third vent hole is connected with a side of the second chamber close to the first chamber.

[0014] The valve core has a first position and a second position, and the valve core is switched between the first position and the second position by sliding in the pump body.

[0015] When the valve core is in the first position, the first vent groove is connected with the first vent hole, and the second vent hole and the third vent hole are both connected with the second vent groove.

[0016] When the valve core is in the second position, the first vent groove is not connected with the first vent hole, the first vent hole and the second vent hole are both connected with the second vent groove, and the air inlet is connected with the third vent hole.

[0017] Preferably, the air outlet is provided with a silencer.

[0018] Preferably, the valve core is provided with a counterbore and a communication hole, the counterbore is connected with the air inlet, and the first vent groove is connected with the counterbore through the communication hole.

[0019] The one or more technical solutions provided in the application have at least the following technical effects or advantages:

[0020] The gas-driven hydraulic pump provided in the application, the chamber wall of the first chamber is provided with a notch, and the discharge port is connected with the first chamber through the notch, so that when the piston rod extends into the first chamber, the fluid in the first chamber can flow to the discharge port through the notch, thereby making the fluid in the first chamber flow to the discharge port at a relatively fast speed. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a sectional view of the present application;

[0023] Figure 2 is a view of A-A in Figure 1 (A valve core is in a first state);

[0024] Figure 3 For Figure 1 A-A view (valve core in the second state) in DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0026] As Figures 1-3 shown, the air-driven hydraulic pump of the present embodiment comprises a pump body 10, a liquid inlet one-way valve 20, a liquid outlet one-way valve 30, a piston 40 and a piston rod 50.

[0027] The pump body 10 has a suction inlet 11, a discharge outlet 12, a first chamber 13 and a second chamber 14.

[0028] The suction inlet 11 and the discharge outlet 12 are both connected with the first chamber 13, the suction inlet 11 is provided with the liquid inlet one-way valve 20, which allows fluid to flow into the first chamber 13 in one direction only, and the discharge outlet 12 is provided with the liquid outlet one-way valve 30, which allows fluid to flow out of the first chamber 13 in one direction only.

[0029] The cavity wall of the first chamber 13 is provided with a slot 131 extending along the axial direction of the first chamber 13, the discharge outlet 12 is connected with the side of the first chamber 13 through the slot 131, the first chamber 13 is coaxially arranged with the second chamber 14, and the first chamber 13 is axially connected with the second chamber 14.

[0030] The piston 40 can be driven by air to move axially in the second chamber 14.

[0031] The piston rod 50 is connected with the piston 40, and the piston rod 50 is driven by the piston 40 to move axially in the first chamber 13 and the second chamber 14. Through the movement of the piston rod 50 in the first chamber 13, fluid can be continuously sucked into the first chamber 13 from the suction inlet 11, and then the fluid in the first chamber 13 is continuously discharged through the discharge outlet 12, so as to achieve the purpose of conveying fluid.

[0032] The pump body 10 is provided with an air inlet 15, an air outlet 16, a first air passage 17, a second air passage 18 and a third air passage 19, the first air passage 17, the second air passage 18 and the third air passage 19 are all annular, and the air outlet 16 is provided with a silencer 161.

[0033] The pump body 10 is provided with a mounting hole 101, and a valve core 60 is slidably arranged in the mounting hole 101. The valve core 60 is provided with a first air passage 61 and a second air passage 62, and both the first air passage 61 and the second air passage 62 are annular.

[0034] The air inlet 15 is communicated with the first air passage 61, that is, the valve core 60 is provided with a counterbore 64 and a communication hole 63. The counterbore 64 is communicated with the air inlet 15, and the first air passage 61 is communicated with the counterbore 64 through the communication hole 63.

[0035] The first air passage 17 is communicated with a side of the second chamber 14 away from the first chamber 13 through a pipe through hole 171. The second air passage 18 is communicated with the air outlet 16. The third air passage 19 is provided with an air hole 191 on a hole wall of the third air passage 19. The air hole 191 is communicated with a side of the second chamber 14 close to the first chamber 13 through a pipeline 192.

[0036] The valve core 60 has a first position and a second position. The valve core 60 is switched between the first position and the second position by sliding in the mounting groove 101 of the pump body 10.

[0037] When the valve core 60 is in the first position, the first air passage 61 is communicated with the first air passage 17, the second air passage 18 and the third air passage 19 are both communicated with the second air passage 62, and the air inlet 15 is not communicated with the third air passage 19.

[0038] When the valve core 60 is in the second position, the first air passage 61 is not communicated with the first air passage 17, the first air passage 17 and the second air passage 18 are both communicated with the second air passage 62, and the air inlet 15 is communicated with the third air passage 19.

[0039] When the piston 40 moves to the side of the second chamber 14 far from the first chamber 13, the valve core 60 is moved to the first position by the control mechanism, at this time, the air entering the air inlet 15 flows into the side of the second chamber 14 far from the first chamber 13 in turn through the counterbore 64, the communication hole 63, the first air passage 61 and the first air hole 17, so as to push the piston 40 to move to the side of the first chamber 13, at this time, the air on the side of the second chamber 14 close to the first chamber 13 flows out through the air outlet 16 in turn through the pipeline 192, the third air hole 19, the second air passage 62 and the second air hole 18; when the piston 40 moves to the side of the second chamber 14 close to the first chamber 13, the valve core 60 is moved to the second position by the control mechanism, at this time, the air entering the air inlet 15 flows into the side of the second chamber 14 close to the first chamber 13 in turn through the third air hole 19 and the pipeline 192, so as to push the piston 40 to move to the side far from the first chamber 13, at this time, the air on the side of the second chamber 14 far from the first chamber 13 flows out through the air outlet 16 in turn through the first air hole 17, the second air passage 62 and the second air hole 18.

[0040] The above description is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gas-driven hydraulic pump characterized by, The utility model relates to a pump body (10) with a suction inlet (11), a discharge outlet (12), a first chamber (13) and a second chamber (14), the suction inlet (11) and the discharge outlet (12) are communicated with the first chamber (13), the cavity wall of the first chamber (13) is provided with a notch (131), the discharge outlet (12) is communicated with the first chamber (13) through the notch (131), the first chamber (13) is communicated with the second chamber (14), a liquid inlet one-way valve (20) is arranged in the suction inlet (11), a liquid outlet one-way valve (30) is arranged in the discharge outlet (12), a piston (40) driven by air can move axially in the second chamber (14), a piston rod (50) is connected with the piston (40) and is driven by the piston (40) to move axially in the first chamber (13) and the second chamber (14). The notch (131) extends along the axial direction of the first chamber (13). The pump body (10) is provided with an air inlet (15), an air outlet (16), a first air passage (17), a second air passage (18) and a third air passage (19), a valve core (60) is slidably arranged in the pump body (10), the valve core (60) is provided with a first air groove (61) and a second air groove (62), the air inlet (15) is communicated with the first air groove (61), the first air passage (17) is communicated with the side of the second chamber (14) away from the first chamber (13), the second air passage (18) is communicated with the air outlet (16), and the third air passage (19) is communicated with the side of the second chamber (14) close to the first chamber (13), The valve core (60) has a first station and a second station, and the valve core (60) is switched between the first station and the second station by sliding in the pump body (10); When the valve core (60) is in the first station, the first air groove (61) is communicated with the first air passage (17), and the second air passage (18) and the third air passage (19) are both communicated with the second air groove (62); When the valve core (60) is in the second station, the first air groove (61) is not communicated with the first air passage (17), the first air passage (17) and the second air passage (18) are both communicated with the second air groove (62), and the air inlet (15) is communicated with the third air passage (19).

2. The gas-driven hydraulic pump of claim 1, wherein, The air outlet (16) is provided with a muffler (161).

3. The gas-driven hydraulic pump of claim 1, wherein, The valve core (60) is provided with a counterbore (64) and a communication hole (63), the counterbore (64) is communicated with the air inlet (15), and the first air groove (61) is communicated with the counterbore (64) through the communication hole (63). ​ ​ ​ 4. The gas-driven hydraulic pump of claim 3, wherein, ​ 5. The gas-driven hydraulic pump of claim 3, wherein, ​

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