Quick feeding manual hydraulic plunger pump

Abstract

The invention relates to the technical field of plunger pumps, in particular to a quick feeding manual hydraulic plunger pump which comprises a pump base and a pump body, a cylinder body is fixedly arranged between the pump base and the pump body, a piston rod is arranged on the pump base, the pump body and the cylinder body in a penetrating mode, a piston body is fixedly arranged on the piston rod, and the piston body is arranged in the cylinder body in a sliding mode. An oil inlet channel and an oil outlet channel are formed in the pump body, one end of the oil inlet channel and one end of the oil outlet channel are both communicated with the cylinder body, the other end of the oil inlet channel and the other end of the oil outlet channel are jointly communicated with an oil bag, and an oil inlet steel ball is arranged in the oil inlet channel and used for controlling on-off of the oil inlet channel. A pressure relief assembly is arranged on the pump body and used for controlling on-off of the oil outlet channel, and a reset spring is arranged between the piston body and the pump base. The manual plunger pump has the effect of facilitating rapid operation of the manual plunger pump.

Description

Technical Field

[0001] This invention relates to the field of piston pump technology, and in particular to a rapid-feed manual hydraulic piston pump. Background Technology

[0002] A piston pump is a key power component in a hydraulic system. It achieves the effect of hydraulic oil intake and discharge by changing the volume of the sealed working chamber through the periodic reciprocating linear motion of the piston rod in the cylinder.

[0003] To accommodate manual operation, most manual piston pumps are designed with piston rods of smaller cross-sectional diameters. Using a smaller diameter piston rod reduces the load on the operator when applying force, making manual operation easier.

[0004] However, due to the small diameter of the piston rod, the volume of hydraulic oil displaced by the piston rod stroke in a single working cycle is very limited, resulting in low overall working efficiency of the manual piston pump, which is not easy to meet the needs of rapid operation. Summary of the Invention

[0005] To facilitate rapid operation of manual piston pumps, this application provides a rapid-feed manual hydraulic piston pump.

[0006] The rapid-feed manual hydraulic piston pump provided in this application adopts the following technical solution: A rapid-feed manual hydraulic piston pump includes a pump base and a pump body. A cylinder is fixedly disposed between the pump base and the pump body. A piston rod is connected through the pump base, pump body, and cylinder. A piston body is fixedly disposed on the piston rod and slidably disposed within the cylinder. An oil inlet channel and an oil outlet channel are provided on the pump body. One end of the oil inlet channel and one end of the oil outlet channel are connected to the cylinder. An oil bag is connected to the other end of the oil inlet channel and the other end of the oil outlet channel. An oil inlet steel ball is disposed in the oil inlet channel to control the opening and closing of the oil inlet channel. A pressure relief assembly is disposed on the pump body to control the opening and closing of the oil outlet channel. A return spring is disposed between the piston body and the pump base.

[0007] By adopting the above technical solution, when the manual plunger pump is operating, the pressure relief assembly blocks the oil outlet channel, and then drives the piston rod to move the piston body closer to the pump seat. During the process of the piston body moving closer to the pump seat, the inlet steel ball moves to open the oil inlet channel. At this time, the oil bag gradually contracts and the hydraulic oil in the oil bag is drawn into the cylinder through the oil inlet channel. When the piston rod is stopped moving, the inlet steel ball resets and blocks the oil inlet channel, making it difficult for the hydraulic oil in the cylinder to return to the oil bag. When the manual plunger pump finishes operating and the piston rod resets, the pressure relief assembly opens the oil outlet channel, and the return spring squeezes the piston body closer to the pump body. During the process of the piston body moving closer to the pump body, the hydraulic oil in the cylinder is squeezed into the oil bag through the oil outlet channel, achieving the effect of piston rod reset. During the operation of the manual plunger pump, on the one hand, the piston rod is used instead of the plunger rod to increase the volume of hydraulic oil replaced in a single working cycle. On the other hand, the flexible oil bag is used to reduce the load intensity when the operator drives the piston rod to move, thereby achieving the effect of rapid operation of the manual plunger pump.

[0008] Preferably, a steel shell is fixedly installed between the pump body and the pump base, the steel shell is fitted onto the oil bag, and a through hole is opened through the cylinder body, the through hole being close to the pump base.

[0009] By adopting the above technical solution, the steel shell protects the oil bag, reducing the possibility of the oil bag being scratched or damaged. At the same time, the oil bag and the steel shell form a double-sealed structure, reducing the risk of hydraulic oil leakage. The through hole ensures that the pressure inside and outside the cylinder is consistent, which facilitates the contraction and expansion of the oil bag.

[0010] Preferably, the oil bag is fitted onto the cylinder body, and the oil bag is located between the pump body and the pump base.

[0011] By adopting the above technical solutions, the space utilization rate of manual hydraulic plunger pumps can be improved.

[0012] Preferably, a pressing seat is fixedly provided on the piston rod, the pressing seat is located above the pump body, a bracket is fixedly provided on the pump body, a pressing arm is rotatably provided on the bracket, the pressing arm is used to abut against the top wall of the pressing seat, and a handle is fixedly provided on the pressing arm.

[0013] By adopting the above technical solution, when the manual plunger pump is in operation, the operator drives the pressing arm to rotate through the handle. The pressing arm squeezes the pressing seat closer to the pump body, thereby the pressing seat drives the piston rod to move, achieving the effect of driving the piston body to move. By using the pressing arm and handle to extend the lever arm, the effect of driving the piston rod and piston body to move is achieved.

[0014] Preferably, the oil inlet channel includes a first oil inlet channel, a second oil inlet channel, a third oil inlet channel, and a fourth oil inlet channel. The first, second, and fourth oil inlet channels are all vertically arranged, while the third oil inlet channel is horizontally arranged. An oil inlet pipe is connected to the bottom end of the first oil inlet channel and inserted into an oil bag. The bottom end of the oil inlet pipe is located near the bottom end of the oil bag. The top end of the first oil inlet channel is connected to the bottom end of the second oil inlet channel. The top end of the second oil inlet channel is connected to one end of the third oil inlet channel. The other end of the third oil inlet channel is connected to the top end of the fourth oil inlet channel. The bottom end of the fourth oil inlet channel is connected to the cylinder block.

[0015] By adopting the above technical solution, the cylinder body and the oil bag are connected by the first oil inlet channel, the second oil inlet channel, the third oil inlet channel and the fourth oil inlet channel connected in sequence. The bottom end of the oil inlet pipe is close to the bottom end of the oil bag, which facilitates the hydraulic oil in the oil bag to enter the cylinder body.

[0016] Preferably, the oil inlet steel ball is disposed in the second oil inlet channel, and the oil inlet steel ball is used to seal the first oil inlet channel. The diameters of the first oil inlet channel and the third oil inlet channel are both smaller than the diameter of the oil inlet steel ball, and the diameter of the second oil inlet channel is larger than the diameter of the oil inlet steel ball.

[0017] By adopting the above technical solution, when the piston body approaches the pump seat, the oil inlet steel ball moves upward to expose the top of the first oil inlet channel, so that the hydraulic oil enters the second oil inlet channel from the first oil inlet channel. When the piston body approaches the pump body or the piston body remains stationary, the oil inlet steel ball abuts against the top of the first oil inlet channel, sealing the top of the first oil inlet channel, so that the hydraulic oil in the second oil inlet channel is not easy to enter the first oil inlet channel.

[0018] Preferably, the oil outlet channel includes a first oil outlet channel, a second oil outlet channel, a third oil outlet channel, and a fourth oil outlet channel. The first and fourth oil outlet channels are both vertically arranged, while the second and third oil outlet channels are both horizontally arranged. The bottom end of the first oil outlet channel is connected to the cylinder body, the top end of the first oil outlet channel is connected to one end of the second oil outlet channel, the other end of the second oil outlet channel is connected to one end of the third oil outlet channel, and the other end of the third oil outlet channel penetrates the side wall of the pump body. The top end of the fourth oil outlet channel is connected to the third oil outlet channel, and the bottom end of the fourth oil outlet channel is connected to the oil bag. The pressure relief component is used to control the opening and closing of the second and fourth oil inlet channels.

[0019] By adopting the above technical solution, the cylinder block and the oil bag are connected through the first oil outlet channel, the second oil outlet channel, the third oil outlet channel and the fourth oil outlet channel connected in sequence.

[0020] Preferably, the pressure relief assembly includes a pressure relief steel ball, a pressure relief sleeve, and a pressure relief screw. The pressure relief steel ball is disposed in the third oil outlet channel, and the inlet steel ball is used to seal the second oil outlet channel. The diameters of the second and fourth oil outlet channels are both smaller than the diameter of the pressure relief steel ball, while the diameter of the third oil outlet channel is larger than the diameter of the pressure relief steel ball. One end of the pressure relief screw is inserted into the third oil outlet channel, and the end of the pressure relief screw located in the third oil outlet channel is used to abut against the pressure relief steel ball. A pressure relief handwheel is fixedly installed at the end of the pressure relief screw located outside the pump body. The pressure relief sleeve is sleeved on the pressure relief screw, and the pressure relief screw and the pressure relief sleeve are threadedly connected. The pressure relief sleeve is fixedly connected to the pump body.

[0021] By adopting the above technical solution, when the pressure relief screws rotate relative to each other, the pressure relief screws move along the third oil outlet channel. When the manual plunger pump is operating, the pressure relief screws press the pressure relief steel ball against the second oil outlet channel, causing the second and third oil outlet channels to be cut off by the pressure relief steel ball. At this time, hydraulic oil is not easy to enter the second oil outlet channel from the third oil outlet channel. When the piston body moves closer to the pump body, the pressure relief screws move to separate the pressure relief steel ball from the second oil outlet channel. At this time, the second and third oil outlet channels are connected, making it easier for hydraulic oil to enter the second oil outlet channel from the third oil outlet channel.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a pump base, pump body, cylinder body, piston rod, piston body, oil inlet channel, oil outlet channel, oil bag, oil inlet steel ball, pressure relief assembly and return spring, during the operation of the manual plunger pump, on the one hand, the piston rod is used instead of the plunger rod to increase the volume of hydraulic oil replaced in a single working cycle, and on the other hand, a flexible oil bag is used to reduce the load intensity when the operator drives the piston rod to move, thereby achieving the effect of rapid operation of the manual plunger pump; 2. By setting up a press base, bracket, press arm, and handle, the movement of the piston rod and piston body is facilitated; 3. By setting up a pressure relief steel ball, pressure relief screw sleeve, pressure relief screw and pressure relief handwheel, the effect of controlling the opening and closing of the oil outlet channel can be achieved. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of a rapid-feed manual hydraulic piston pump according to an embodiment of this application.

[0024] Figure 2 This is a cross-sectional view showing the positional relationship between the oil inlet channel and the pump body in the embodiments of this application.

[0025] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0026] Figure 4 This is a cross-sectional view showing the positional relationship between the oil passage and the pump body in the embodiments of this application.

[0027] Figure 5 yes Figure 4 Enlarged view of section B.

[0028] Explanation of reference numerals in the attached drawings: 1. Cylinder block; 11. Pump base; 12. Pump body; 13. Through hole; 2. Oil inlet channel; 21. First oil inlet channel; 211. Oil inlet pipe; 22. Second oil inlet channel; 221. Oil inlet steel ball; 23. Third oil inlet channel; 24. Fourth oil inlet channel; 3. Oil outlet channel; 31. First oil outlet channel; 32. Second oil outlet channel; 33. Third oil outlet channel; 34. Fourth oil outlet channel; 4. Oil bag; 41. Steel shell; 5. Pressure relief assembly; 51. Pressure relief steel ball; 52. Pressure relief screw sleeve; 53. Pressure relief screw; 531. Pressure relief handwheel; 6. Return spring; 7. Press seat; 71. Press arm; 72. Handle; 73. Bracket; 8. Piston rod; 81. Piston body. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a rapid-feed manual hydraulic piston pump. (Refer to...) Figures 1 to 4The system includes a pump base 11 and a pump body 12, with a cylinder 1 installed between the pump base 11 and the pump body 12. A piston body 81 is slidably disposed inside the cylinder 1, with the outer wall of the piston body 81 and the inner wall of the cylinder 1 fitting together to achieve a seal. A piston rod 8 is disposed through the piston body 81 and is fixedly connected to the piston body 81. The top end of the piston rod 8 passes through the top wall of the cylinder 1 and the pump body 12, and the bottom end of the piston rod 8 passes through the bottom wall of the cylinder 1 and the pump base 11. The cylinder 1, pump body 12, and pump base 11 are all slidably connected to the piston rod 8, and the piston rod 8, cylinder 1, pump body 12, and pump base 11 are all sealed together. An oil inlet channel 2 and an oil outlet channel 3 are provided on the pump body 12. One end of the oil inlet channel 2 and one end of the oil outlet channel 3 are connected to the cylinder 1, and the other end of the oil inlet channel 2 and the other end of the oil outlet channel 3 are connected to an oil bag 4, which is fitted onto the cylinder 1 and stores hydraulic oil. A steel shell 41 is sealed between the pump base 11 and the pump body 12, and the steel shell 41 is fitted onto the oil bag 4. The cylinder body 1, oil bag 4, and steel shell 41 are nested in sequence to improve the space utilization of the manual hydraulic plunger pump. The steel shell 41 protects the oil bag 4, reducing the possibility of the oil bag 4 being scratched or damaged. At the same time, the oil bag 4 and the steel shell 41 form a double-sealed structure, reducing the risk of hydraulic oil leakage. A through hole 13 is opened through the cylinder body 1, close to the pump base 11. The through hole 13 makes the pressure inside and outside the cylinder body 1 consistent, facilitating the contraction and expansion of the oil bag 4. An oil inlet steel ball 221 is installed in the oil inlet channel 2 to control the opening and closing of the oil inlet channel 2. A pressure relief assembly 5 is installed on the pump body 12 to control the opening and closing of the oil outlet channel 3. A return spring 6 is fitted on the piston rod 8, and the return spring 6 abuts between the piston body 81 and the pump base 11. When the manual plunger pump is in operation, the pressure relief assembly 5 blocks the oil outlet channel 3, and then drives the piston rod 8 to move the piston body 81 closer to the pump seat 11. During this process, the inlet steel ball 221 moves, opening the oil inlet channel 2. At this time, the oil bag 4 gradually contracts, and the hydraulic oil in the oil bag 4 is drawn into the cylinder 1 through the oil inlet channel 2. When the piston rod 8 stops moving, the inlet steel ball 221 resets, blocking the oil inlet channel 2, making it difficult for the hydraulic oil in the cylinder 1 to return to the oil bag 4. When the manual plunger pump finishes operating and the piston rod 8 resets, the pressure relief assembly 5 opens the oil outlet channel 3, and the return spring 6 presses the piston body 81 closer to the pump body 12. During this process, the hydraulic oil in the cylinder 1 is forced into the oil bag 4 through the oil outlet channel 3, achieving the effect of resetting the piston rod 8. During the operation of the manual piston pump, on the one hand, the piston rod 8 is used to replace the piston rod, increasing the volume of hydraulic oil replaced in a single working cycle; on the other hand, a flexible oil bag 4 is used to reduce the load intensity when the operator drives the piston rod 8 to move, thereby achieving the effect of rapid operation of the manual piston pump.

[0031] Reference Figure 1A pressing seat 7 is fitted onto the piston rod 8, and the pressing seat 7 is fixedly connected to the piston rod 8. The pressing seat 7 is located above the pump body 12, and its bottom is used to abut against the top of the pump body 12. A bracket 73 is installed on the top of the pump body 12, and a pressing arm 71 is rotatably mounted on the bracket 73. The pressing arm 71 is used to abut against the top wall of the pressing seat 7. A handle 72 is installed on the pressing arm 71, and the handle 72 extends the lever arm of the pressing arm 71. When the manual plunger pump is in operation, the operator drives the pressing arm 71 to rotate through the handle 72. The pressing arm 71 squeezes the pressing seat 7 closer to the pump body 12, thereby causing the pressing seat 7 to move the piston rod 8, achieving the effect of driving the piston body 81 to move. By using the pressing arm 71 and the handle 72 to extend the lever arm, the movement of the piston rod 8 and the piston body 81 is facilitated.

[0032] Reference Figures 1 to 3 The oil inlet channel 2 includes a first oil inlet channel 21, a second oil inlet channel 22, a third oil inlet channel 23, and a fourth oil inlet channel 24. The first, second, and fourth oil inlet channels 21 and 22 are all vertically arranged, while the third oil inlet channel 23 is horizontally arranged. An oil inlet pipe 211 is connected to the bottom of the first oil inlet channel 21. The oil inlet pipe 211 is inserted into the oil bag 4, with its bottom end close to the bottom of the oil bag 4 to facilitate the entry of hydraulic oil from the oil bag 4 into the cylinder body 1. The top of the first oil inlet channel 21 is connected to the bottom of the second oil inlet channel 22. The top of the second oil inlet channel 22 is connected to one end of the third oil inlet channel 23. The other end of the third oil inlet channel 23 is connected to the top of the fourth oil inlet channel 24. The bottom of the fourth oil inlet channel 24 is connected to the cylinder body 1. The cylinder body 1 and the oil bag 4 are connected by a first oil inlet channel 21, a second oil inlet channel 22, a third oil inlet channel 23, and a fourth oil inlet channel 24 connected in sequence. An inlet steel ball 221 is located inside the second oil inlet channel 22 and is used to seal the first oil inlet channel 21. The diameters of the first and third oil inlet channels 21 and 23 are both smaller than the diameter of the inlet steel ball 221, while the diameter of the second oil inlet channel 22 is larger than the diameter of the inlet steel ball 221. When the piston body 81 approaches the pump seat 11, the inlet steel ball 221 moves upward, exposing the top of the first oil inlet channel 21, thereby allowing hydraulic oil to enter the second oil inlet channel 22 from the first oil inlet channel 21. When the piston body 81 approaches the pump body 12 or the piston body 81 remains stationary, the oil inlet steel ball 221 abuts against the top of the first oil inlet channel 21, sealing the top of the first oil inlet channel 21, making it difficult for the hydraulic oil in the second oil inlet channel 22 to enter the first oil inlet channel 21.

[0033] Reference Figures 1 to 5The oil outlet channel 3 includes a first oil outlet channel 31, a second oil outlet channel 32, a third oil outlet channel 33, and a fourth oil outlet channel 34. The first oil outlet channel 31 and the fourth oil outlet channel 34 are both vertically arranged, while the second oil outlet channel 32 and the third oil outlet channel 33 are both horizontally arranged. The bottom end of the first oil outlet channel 31 is connected to the cylinder body 1, the top end of the first oil outlet channel 31 is connected to one end of the second oil outlet channel 32, the other end of the second oil outlet channel 32 is connected to one end of the third oil outlet channel 33, and the other end of the third oil outlet channel 33 penetrates the side wall of the pump body 12. The top end of the fourth oil outlet channel 34 is connected to the third oil outlet channel 33, and the bottom end of the fourth oil outlet channel 34 is connected to the oil bag 4. The cylinder body 1 and the oil bag 4 are connected by the sequentially connected first oil outlet channel 31, second oil outlet channel 32, third oil outlet channel 33, and fourth oil outlet channel 34.

[0034] refer to Figures 1 to 5 The pressure relief assembly 5 includes a pressure relief steel ball 51, a pressure relief screw sleeve 52, and a pressure relief screw 53. The pressure relief steel ball 51 is located within the third oil outlet channel 33, and the inlet steel ball 221 is used to seal the second oil outlet channel 32. The diameters of the second and fourth oil outlet channels 34 are both smaller than the diameter of the pressure relief steel ball 51, while the diameter of the third oil outlet channel 33 is larger than the diameter of the pressure relief steel ball 51. One end of the pressure relief screw 53 is inserted into the third oil outlet channel 33, and this end abuts against the pressure relief steel ball 51. A pressure relief handwheel 531 is installed at the end of the pressure relief screw 53 located outside the pump body 12, providing easy gripping for the operator. The pressure relief sleeve 52 is fixedly installed on the pump body 12, and is fitted onto the pressure relief screw 53, which is threadedly connected to the pressure relief sleeve 52. When the pressure relief screw 53 rotates relative to the pressure relief screw 53, the pressure relief screw 53 moves along the third oil outlet channel 33. When the manual plunger pump is operating, the pressure relief screw 53 presses the pressure relief steel ball 51 against the second oil outlet channel 32, cutting off the connection between the second and third oil outlet channels 32 and 33 through the pressure relief steel ball 51. At this time, hydraulic oil is less likely to enter the second oil outlet channel 32 from the third oil outlet channel 33. When the piston body 81 moves closer to the pump body 12, the pressure relief screw 53 moves, causing the pressure relief steel ball 51 to separate from the second oil outlet channel 32. At this time, the second and third oil outlet channels 32 are connected, facilitating the entry of hydraulic oil from the third oil outlet channel 33 into the second oil outlet channel 32.

[0035] The implementation principle of a rapid-feed manual hydraulic plunger pump according to an embodiment of this application is as follows: When the manual plunger pump is operating, the pressure relief screw 53 abuts the pressure relief steel ball 51 against the second oil outlet channel 32, causing the second oil outlet channel 32 and the third oil outlet channel 33 to be cut off by the pressure relief steel ball 51. Then, the operator pushes the pressing arm 71 to push the pressing seat 7 closer to the pump body 12. At this time, the piston rod 8 drives the piston body 81 closer to the pump seat 11. During the process of the piston body 81 approaching the pump seat 11, the oil inlet steel ball 221 moves upward and exposes the top of the first oil inlet channel 21. At this time, the oil bag 4 gradually contracts and the hydraulic oil in the oil bag 4 is drawn into the cylinder 1 through the oil inlet channel 2. When the piston rod 8 stops moving, the oil inlet steel ball 221 resets and blocks the oil inlet channel 2, making it difficult for the hydraulic oil in the cylinder 1 to return to the oil bag 4. When the manual plunger pump finishes operation and the piston rod 8 returns to its original position, the pressure relief screw 53 moves, causing the pressure relief steel ball 51 to separate from the second oil outlet channel 32. At this time, the second oil outlet channel 32 and the third oil outlet channel 33 become connected, and the return spring 6 presses the piston body 81 closer to the pump body 12. During the process of the piston body 81 moving closer to the pump body 12, the hydraulic oil in the cylinder 1 is squeezed into the oil bag 4 through the oil outlet channel 3, achieving the effect of resetting the piston rod 8. During the operation of the manual plunger pump, on the one hand, the piston rod 8 is used instead of the plunger rod, increasing the volume of hydraulic oil replaced in a single working cycle; on the other hand, the flexible oil bag 4 is used to reduce the load intensity when the operator drives the piston rod 8 to move, thereby achieving the effect of rapid operation of the manual plunger pump.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapid-feed manual hydraulic piston pump, comprising a pump base and a pump body, wherein a cylinder is fixedly disposed between the pump base and the pump body, a piston rod is provided through the pump base, the pump body, and the cylinder, a piston body is fixedly disposed on the piston rod, and the piston body is slidably disposed within the cylinder, characterized in that: The pump body has an oil inlet channel and an oil outlet channel. One end of the oil inlet channel and one end of the oil outlet channel are connected to the cylinder body. The other end of the oil inlet channel and the other end of the oil outlet channel are connected to an oil bag. An oil inlet steel ball is installed in the oil inlet channel to control the opening and closing of the oil inlet channel. A pressure relief assembly is installed on the pump body to control the opening and closing of the oil outlet channel. A return spring is installed between the piston body and the pump seat.

2. The rapid-feed manual hydraulic piston pump according to claim 1, characterized in that: A steel shell is fixedly installed between the pump body and the pump base. The steel shell is fitted onto the oil bag. A through hole is opened through the cylinder body, and the through hole is close to the pump base.

3. The rapid-feed manual hydraulic piston pump according to claim 1, characterized in that: The oil bag is fitted onto the cylinder body and is located between the pump body and the pump base.

4. A rapid-feed manual hydraulic piston pump according to claim 1, characterized in that: A pressing seat is fixedly installed on the piston rod. The pressing seat is located above the pump body. A bracket is fixedly installed on the pump body. A pressing arm is rotatably installed on the bracket. The pressing arm is used to abut against the top wall of the pressing seat. A handle is fixedly installed on the pressing arm.

5. A rapid-feed manual hydraulic piston pump according to claim 1, characterized in that: The oil inlet channel includes a first oil inlet channel, a second oil inlet channel, a third oil inlet channel, and a fourth oil inlet channel. The first, second, and fourth oil inlet channels are all vertically arranged, while the third oil inlet channel is horizontally arranged. An oil inlet pipe is connected to the bottom end of the first oil inlet channel and inserted into the oil bag. The bottom end of the oil inlet pipe is located near the bottom end of the oil bag. The top end of the first oil inlet channel is connected to the bottom end of the second oil inlet channel. The top end of the second oil inlet channel is connected to one end of the third oil inlet channel. The other end of the third oil inlet channel is connected to the top end of the fourth oil inlet channel. The bottom end of the fourth oil inlet channel is connected to the cylinder block.

6. A rapid-feed manual hydraulic piston pump according to claim 5, characterized in that: The oil inlet steel ball is disposed in the second oil inlet channel. The oil inlet steel ball is used to seal the first oil inlet channel. The diameters of the first oil inlet channel and the third oil inlet channel are both smaller than the diameter of the oil inlet steel ball, while the diameter of the second oil inlet channel is larger than the diameter of the oil inlet steel ball.

7. A rapid-feed manual hydraulic piston pump according to claim 1, characterized in that: The oil outlet channels include a first oil outlet channel, a second oil outlet channel, a third oil outlet channel, and a fourth oil outlet channel. The first and fourth oil outlet channels are both vertically arranged, while the second and third oil outlet channels are both horizontally arranged. The bottom end of the first oil outlet channel is connected to the cylinder block, the top end of the first oil outlet channel is connected to one end of the second oil outlet channel, the other end of the second oil outlet channel is connected to one end of the third oil outlet channel, and the other end of the third oil outlet channel penetrates the side wall of the pump body. The top end of the fourth oil outlet channel is connected to the third oil outlet channel, and the bottom end of the fourth oil outlet channel is connected to the oil bag. The pressure relief assembly is used to control the opening and closing of the second and fourth oil inlet channels.

8. A rapid-feed manual hydraulic piston pump according to claim 7, characterized in that: The pressure relief assembly includes a pressure relief steel ball, a pressure relief sleeve, and a pressure relief screw. The pressure relief steel ball is disposed in the third oil outlet channel. The inlet steel ball is used to seal the second oil outlet channel. The diameters of the second and fourth oil outlet channels are both smaller than the diameter of the pressure relief steel ball. The diameter of the third oil outlet channel is larger than the diameter of the pressure relief steel ball. One end of the pressure relief screw is inserted into the third oil outlet channel. The end of the pressure relief screw located in the third oil outlet channel is used to abut against the pressure relief steel ball. A pressure relief handwheel is fixedly installed at the end of the pressure relief screw located outside the pump body. The pressure relief sleeve is sleeved on the pressure relief screw. The pressure relief screw and the pressure relief sleeve are threadedly connected. The pressure relief sleeve is fixedly connected to the pump body.

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