Air inlet structure of booster pump

Abstract

The utility model relates to the technical field of booster pumps, and discloses an air inlet structure of a booster pump, which comprises an oil cylinder, an oil feeding barrel and a shell, the oil feeding barrel is mounted at the end of the oil cylinder, the shell is mounted on the outer side of the oil cylinder, an air inlet is arranged on one side of the shell, an air outlet is arranged on the other side of the shell, and an oil inlet is mounted at the bottom end of the oil feeding barrel. A one-way ball valve is arranged in the oil feeding barrel, an oil cavity is formed in the oil cylinder, and a supporting rod is inserted into the oil cavity. A plugging block is installed at the bottom end of a small piston, the diameter of the plugging block is larger than that of an air inlet hole, the air inlet hole can be effectively plugged in different working states, fluctuation of air inlet pressure is reduced, effective control over an air inlet is achieved through the design of an air pipe and a first control groove, and external fluctuation is prevented from being directly transmitted into the oil cylinder; and the one-way ball valve is in contact with the bottom end of the oil cylinder, hydraulic oil entering the oil cylinder is effectively filtered, and impurities and pollutants are prevented from entering the system.

Description

Technical Field

[0001] The utility model relates to the technical field of booster pumps, in particular to an air intake structure of a booster pump. Background Art

[0002] A booster pump is a device designed to increase the pressure of hydraulic oil and is widely used in hydraulic systems. Its main function is to convert low-pressure liquid into high-pressure liquid through a booster device to supply hydraulic equipment.

[0003] A hydraulic booster pump works by compressing the hydraulic oil within the pump through a mechanical mechanism, thereby increasing its pressure. Typically, a hydraulic booster pump is driven by an external electric motor or internal combustion engine. This increased pressure allows the hydraulic oil to flow to equipment such as hydraulic cylinders and hydraulic motors, thereby performing various mechanical actions.

[0004] The intake process of a hydraulic booster pump involves converting low-pressure hydraulic oil into high-pressure oil through a pressure-boosting device. When the system is at rest or at low pressure, the hydraulic oil is contained in a reservoir or low-pressure delivery line. When the electric motor or internal combustion engine is started, driving the piston head of the hydraulic booster pump back and forth, the internal volume increases, creating negative pressure. The low-pressure hydraulic oil in the reservoir or low-pressure oil line is drawn into the hydraulic pump's intake port. The movement of the rotating components gradually pushes the low-pressure hydraulic oil into the pump's compression zone. In this compression zone, the volume of the rotating components decreases, compressing the hydraulic oil and gradually increasing its pressure.

[0005] The compressed high-pressure hydraulic oil enters the high-pressure delivery pipeline from the discharge end of the hydraulic pump. According to the needs of the system, the high-pressure hydraulic oil can be delivered to the corresponding hydraulic actuator to perform specific mechanical actions.

[0006] The air inlet may be affected by fluctuations in other equipment or pipelines in the hydraulic system, resulting in unstable intake pressure and fluctuations in the pump output pressure, affecting the stability and performance of the system; therefore, it does not meet existing needs. For this reason, we propose an intake structure for a booster pump. Utility Model Content

[0007] The utility model provides an air intake structure for a booster pump, which has the beneficial effect of being able to effectively block the air intake hole under different working conditions and reduce the fluctuation of the air intake pressure. It solves the problem mentioned in the above background technology that the air intake port may be affected by the fluctuation of other equipment or pipelines in the hydraulic system, resulting in unstable air intake pressure, possible fluctuation of the output pressure of the pump, and affecting the stability and performance of the system.

[0008] The utility model provides the following technical solution: an air intake structure of a booster pump, comprising an oil cylinder, an oil supply cylinder and an outer shell, the oil supply cylinder being mounted at the end of the oil cylinder, the outer shell being mounted on the outside of the oil cylinder, an air inlet being provided on one side of the outer shell, an air outlet being provided on the other side of the outer shell, an oil inlet being installed at the bottom end of the oil supply cylinder, a one-way ball valve being provided in the oil supply cylinder, an oil chamber being provided in the oil cylinder, a support rod being inserted in the oil chamber, a large piston being provided on the outer sleeve of the support rod, a small piston being provided in the oil chamber, the small piston being located on the bottom side of the large piston, and a muffler being provided on the outer shell.

[0009] As an optional scheme for the air intake structure of a booster pump described in the utility model, wherein: two outer shells are provided, and the two outer shells are divided into an upper shell and a lower shell, the upper shell is installed at the upper end of the oil cylinder, and the lower shell is installed at the bottom end of the lower shell, and the upper shell and the lower shell assembly are connected with an air pipe, and the two ends of the air pipe are connected to the air inlet.

[0010] As an optional scheme for the air intake structure of a booster pump described in the utility model, wherein: a first control groove is opened in the lower shell body, an air intake hole is opened at the bottom of the lower shell body, the small piston is inserted into the air intake hole through the first control groove, and a blocking block is installed at the bottom end of the small piston, the blocking block is on the outside of the air intake hole, and the diameter of the blocking block is larger than the diameter of the air intake hole.

[0011] As an optional scheme for the air intake structure of a booster pump described in the utility model, an oil pipe is provided in the oil supply cylinder, the one-way ball valve is installed at both ends of the oil pipe, a filter is installed in the oil inlet, and the filter is in contact with the one-way ball valve near the bottom end of the oil cylinder.

[0012] As an optional scheme for the air intake structure of a booster pump described in the utility model, wherein: a second control groove is opened in the upper shell body, the second control groove is connected with the air inlet and the air outlet, a transverse piston is slidably inserted in the second control groove, and a sealing plate for sealing the air outlet is installed at the end of the transverse piston, the diameter of the sealing plate is larger than the diameter of the air outlet, and the transverse piston is located on the bottom side of the muffler.

[0013] As an optional scheme for the air intake structure of a booster pump described in the utility model, wherein: an oil groove corresponding to the one-way ball valve is opened in the oil pipe, the oil groove is connected to the oil chamber, the one-way ball valve is movably inserted in the oil groove, and a first spring is provided in the oil groove, one end of the first spring is fixedly sleeved on the outside of the one-way ball valve, and the other end of the first spring is fixedly installed in the oil groove.

[0014] As an optional scheme for the air intake structure of a booster pump described in the utility model, a second spring is provided in the air intake port, one end of the second spring is fixedly sleeved outside the small piston, and the other end of the second spring is fixedly installed in the air intake hole.

[0015] As an optional solution for the air intake structure of a booster pump described in the utility model, a sealing strip is installed on the blocking block, and the sealing strip is configured as a rubber strip.

[0016] The utility model has the following beneficial effects:

[0017] 1. The air intake structure of the booster pump is equipped with a blocking block at the bottom of the small piston. The diameter of the blocking block is larger than the diameter of the air intake hole, which can effectively block the air intake hole under different working conditions and reduce the fluctuation of the air intake pressure. The design of the air pipe and the first control groove realizes the effective control of the air intake to prevent external fluctuations from being directly transmitted to the oil cylinder. A filter is installed in the oil inlet and contacts with the one-way ball valve near the bottom of the oil cylinder to effectively filter the hydraulic oil entering the oil cylinder and prevent impurities and pollutants from entering the system.

[0018] 2. The intake structure of the booster pump is characterized in that an oil groove is opened in the oil pipe, the oil groove is connected to the oil chamber, a one-way ball valve is movably inserted in the oil groove, a first spring is provided in the oil groove, one end of the first spring is fixedly sleeved outside the one-way ball valve, and the other end is fixedly installed in the oil groove. The elastic force of the spring ensures the precise control of the one-way ball valve in different working conditions, and improves the suction and discharge efficiency of the hydraulic oil. A second spring is provided in the air inlet, and the setting of the second spring enhances the stability and elastic control of the small piston in the air inlet hole, thereby improving the stability of the intake pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main three-dimensional structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the main planar structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the main body cutaway structure of the present utility model.

[0022] Figure 4 This is a schematic diagram of other cross-sectional structures of the main body of the present utility model.

[0023] In the figure: 110, oil cylinder; 111, oil supply cylinder; 112, outer shell; 113, air inlet; 114, air outlet; 115, oil inlet; 116, one-way ball valve; 117, oil chamber; 118, support rod; 119, large piston; 120, small piston; 121, muffler; 122, upper shell; 123, lower shell; 124, air pipe; 130, first control groove; 131, air inlet; 132, blocking block; 133, second spring; 134, sealing strip; 140, oil pipe; 141, filter screen; 142, oil tank; 143, first spring; 150, second control groove; 151, transverse piston; 152, blocking plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1: This example aims to solve the problem that the air inlet 113 may be affected by the fluctuation of other equipment or pipelines in the hydraulic system, resulting in unstable air intake pressure and fluctuation of the pump output pressure, which affects the stability and performance of the system. Figure 1-Figure 4 , an air intake structure of a booster pump, including an oil cylinder 110, an oil supply cylinder 111 and a shell 112, the oil supply cylinder 111 is installed at the end of the oil cylinder 110, the shell 112 is installed on the outside of the oil cylinder 110, an air inlet 113 is opened on one side of the shell 112, and an air outlet 114 is opened on the other side of the shell 112, an oil inlet 115 is installed at the bottom end of the oil supply cylinder 111, a one-way ball valve 116 is provided in the oil supply cylinder 111, an oil chamber 117 is opened in the oil cylinder 110, a support rod 118 is inserted in the oil chamber 117, a large piston 119 is provided on the outer sleeve of the support rod 118, a small piston 120 is provided in the oil chamber 117, the small piston 120 is located on the bottom side of the large piston 119, and a muffler 121 is provided on the shell 112.

[0026] Two housings 112 are provided, each of which is divided into an upper housing 122 and a lower housing 123. The upper housing 122 is mounted on the upper end of the oil cylinder 110, and the lower housing 123 is mounted on the bottom end of the lower housing 123. An air pipe 124 is inserted into the upper and lower housing 123 assemblies, and both ends of the air pipe 124 are inserted into the air inlet 113. A first control groove 130 is defined in the lower housing 123, and an air inlet hole 131 is defined at the bottom of the lower housing 123. The small piston 120 is inserted into the air inlet hole 131 through the first control groove 130. A blocking block 132 is mounted on the bottom end of the small piston 120. The blocking block 132 is located outside the air inlet hole 131, and the diameter of the blocking block 132 is larger than that of the air inlet hole 131.

[0027] An oil pipe 140 is installed in the oil supply cylinder 111, with a one-way ball valve 116 installed at both ends of the oil pipe 140. A filter screen 141 is installed in the oil inlet 115, and the filter screen 141 contacts the one-way ball valve 116 near the bottom of the oil cylinder. A second control groove 150 is provided in the upper shell 122, which is connected to the air inlet 113 and the air outlet 114. A transverse piston 151 is slidably inserted into the second control groove 150. A sealing plate 152 for blocking the air outlet 114 is installed at the end of the transverse piston 151. The diameter of the sealing plate 152 is larger than that of the air outlet 114, and the transverse piston 151 is located on the bottom side of the muffler 121.

[0028] The large piston 119 moves upward, pumping oil from the oil cylinder 110. When it moves downward, it presses the oil into the oil pipe 140, working reciprocatingly. When the large piston 119 presses against the small piston 120, the air pipe 124 is ventilated. The large piston 119 moves downward, and when it reaches the bottom, it presses against the small piston 120, allowing air to enter the air pipe 124, and the large piston 119 moves upward. When the large piston 119 moves upward, the transverse piston 151 moves left to release air. Above it is the black muffler 121. When the large piston 119 moves downward, the transverse piston 151 moves right to block the air outlet. When the large piston 119 moves upward, the lower one-way valve draws oil from the oil cylinder 110 into the cavity. When the large piston 119 moves downward, the oil in the cavity enters the second one-way valve. When the large piston 119 moves upward again, the oil is pressurized and squeezed out, achieving the purpose of boosting.

[0029] When the large piston 119 moves upward, the small piston 120 is pressed down, the blocking block 132 releases the blockage on the air inlet 131, and the air pipe 124 is ventilated. During the upward process, the one-way ball valve 116 near the bottom of the oil cylinder 110 opens, and the oil is sucked from the oil cylinder 110 into the cavity inside the oil barrel 111. At the same time, the transverse piston 151 moves to the left, the blocking plate 152 releases the blockage on the air outlet 114, and the black muffler 121 above starts to work to reduce noise. When the large piston 119 moves downward, the small piston 120 is lifted, the blocking block 132 re-blocks the air inlet 131, and the air pipe 124 stops taking in air. During the downward process, the lower one-way ball valve 116 is closed, and the oil in the oil chamber 117 enters the one-way ball valve 116 near the top of the oil barrel. At the same time, the transverse piston 151 moves to the right, the blocking plate 152 re-blocks the air outlet 114, and the air outlet stops. When the large piston 119 moves upward again, the second one-way ball valve 116 opens, and the oil in the cavity is pressurized and squeezed out, achieving the purpose of pressurization. The oil is pressed into the output pipeline and supplied to the hydraulic system.

[0030] In this embodiment: a blocking block 132 is installed at the bottom end of the small piston 120. The diameter of the blocking block 132 is larger than the diameter of the air inlet hole 131. It can effectively block the air inlet hole 131 under different working conditions and reduce the fluctuation of the intake pressure. Through the design of the air pipe 124 and the first control groove 130, the effective control of the air inlet 113 is achieved to prevent external fluctuations from being directly transmitted to the oil cylinder 110. A filter screen 141 is installed in the oil inlet 115 and is in contact with the one-way ball valve 116 near the bottom end of the oil cylinder, effectively filtering the hydraulic oil entering the oil cylinder 110 and preventing impurities and pollutants from entering the system.

[0031] Example 2: This example aims to solve the problem that the control of the one-way ball valve 116 may not be precise enough, resulting in low efficiency of hydraulic oil suction and discharge. This example is an improvement made on the basis of Example 1. For details, please refer to Figure 1-Figure 4 An oil groove 142 corresponding to the one-way ball valve 116 is defined in the oil pipe 140 . The oil groove 142 is communicated with the oil chamber 117 . The one-way ball valve 116 is movably inserted into the oil groove 142 . A first spring 143 is disposed in the oil groove 142 . One end of the first spring 143 is fixedly sleeved outside the one-way ball valve 116 , and the other end of the first spring 143 is fixedly mounted in the oil groove 142 .

[0032] A second spring 133 is installed within the air inlet 113. One end of the second spring 133 is fixedly mounted on the outside of the small piston 120, and the other end of the second spring 133 is fixedly mounted within the air inlet 131. A sealing strip 134 is installed on the sealing block 132. The sealing strip 134 is a rubber strip. The rubber strip has excellent elasticity and sealing properties, effectively improving the sealing effect of the sealing block 132 on the air inlet 131, reducing gas leakage and pressure fluctuations.

[0033] In this embodiment: an oil groove 142 is opened in the oil pipe 140, the oil groove 142 is connected to the oil chamber 117, the one-way ball valve 116 is movably inserted in the oil groove 142, and a first spring 143 is provided in the oil groove 142. One end of the first spring 143 is fixedly sleeved on the outside of the one-way ball valve 116, and the other end is fixedly installed in the oil groove 142. Through the elastic force of the spring, the precise control of the one-way ball valve 116 in different working conditions is ensured, and the suction and discharge efficiency of the hydraulic oil is improved. A second spring 133 is provided in the air inlet 113. Through the setting of the second spring 133, the stability and elastic control of the small piston 120 in the air inlet hole 131 are enhanced, thereby improving the stability of the intake pressure.

[0034] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An air intake structure of a booster pump, comprising an oil cylinder (110), an oil supply cylinder (111) and a housing (112), characterized in that: The oil supply cylinder (111) is installed at the end of the oil cylinder (110), and the shell (112) is installed on the outside of the oil cylinder (110). An air inlet (113) is provided on one side of the shell (112), and an air outlet (114) is provided on the other side of the shell (112). An oil inlet (115) is installed at the bottom end of the oil supply cylinder (111). A one-way ball valve (116) is provided in the oil supply cylinder (111). An oil chamber (117) is provided in the oil cylinder (110). A support rod (118) is inserted in the oil chamber (117). A large piston (119) is provided on the outer sleeve of the support rod (118). A small piston (120) is provided in the oil chamber (117). The small piston (120) is located on the bottom side of the large piston (119). A muffler (121) is provided on the shell (112).

2. The air intake structure of a booster pump according to claim 1, characterized in that: Two shells (112) are provided, and the two shells (112) are divided into an upper shell (122) and a lower shell (123). The upper shell (122) is installed at the upper end of the oil cylinder (110), and the lower shell (123) is installed at the bottom end of the lower shell (123). The upper shell (122) and the lower shell (123) components are plugged with an air pipe (124), and both ends of the air pipe (124) are plugged with the air inlet (113).

3. The air intake structure of a booster pump according to claim 2, characterized in that: A first control groove (130) is provided in the lower shell (123), an air inlet hole (131) is provided at the bottom of the lower shell (123), the small piston (120) is inserted into the air inlet hole (131) through the first control groove (130), a blocking block (132) is installed at the bottom end of the small piston (120), the blocking block (132) is located outside the air inlet hole (131), and the diameter of the blocking block (132) is larger than the diameter of the air inlet hole (131).

4. The air intake structure of a booster pump according to claim 1, characterized in that: An oil pipe (140) is provided in the oil supply cylinder (111), the one-way ball valve (116) is installed at both ends of the oil pipe (140), a filter screen (141) is installed in the oil inlet (115), and the filter screen (141) is in contact with the one-way ball valve (116) near the bottom end of the oil cylinder.

5. The air intake structure of a booster pump according to claim 2, characterized in that: A second control groove (150) is provided in the upper shell (122), and the second control groove (150) is communicated with the air inlet (113) and the air outlet (114). A transverse piston (151) is slidably inserted in the second control groove (150), and a blocking plate (152) for blocking the air outlet (114) is installed at the end of the transverse piston (151). The diameter of the blocking plate (152) is larger than the diameter of the air outlet (114), and the transverse piston (151) is located on the bottom side of the muffler (121).

6. The air intake structure of a booster pump according to claim 4, characterized in that: An oil groove (142) corresponding to the one-way ball valve (116) is provided in the oil pipe (140), the oil groove (142) is communicated with the oil chamber (117), the one-way ball valve (116) is movably inserted in the oil groove (142), and a first spring (143) is provided in the oil groove (142), one end of the first spring (143) is fixedly sleeved outside the one-way ball valve (116), and the other end of the first spring (143) is fixedly installed in the oil groove (142).

7. The air intake structure of a booster pump according to claim 3, characterized in that: A second spring (133) is provided in the air inlet (113), one end of the second spring (133) is fixedly sleeved outside the small piston (120), and the other end of the second spring (133) is fixedly installed in the air inlet hole (131).

8. The air intake structure of a booster pump according to claim 3, characterized in that: A sealing strip (134) is installed on the blocking block (132), and the sealing strip (134) is configured as a rubber strip.

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