An ultra-high pressure manual hydraulic pump that reduces the force required to operate the handle

Abstract

This utility model discloses an ultra-high pressure manual hydraulic pump that reduces the operating force of the handle, including an oil tank, a pump core assembly connected to the oil tank, a handle rotatably mounted on the pump core assembly, and a handle mounted on the handle; characterized in that the pump core assembly includes a valve block, a front seat mounted on the valve block, a dual-speed pump core, a low-pressure safety valve, and a high-pressure safety valve; the valve block is provided with a main oil suction channel, a large pump core oil suction channel and a small pump core oil suction channel connected to the main oil suction channel and the dual-speed pump core, and a return oil channel connecting the main oil suction channel and the low-pressure safety valve. This utility model uses the dual-speed pump core to press the hydraulic oil. The hydraulic oil in the large pump core oil suction channel and the small pump core oil suction channel opens the low-pressure safety valve and returns to the oil tank, keeping the low-pressure safety valve open. When the dual-speed pump core presses down again, the hydraulic oil in the large pump core oil suction channel directly returns to the oil tank through the low-pressure safety valve, thereby reducing the operating force of the handle.

Description

Technical Field

[0001] This utility model relates to the field of manual hydraulic pump technology, specifically to an ultra-high pressure manual hydraulic pump that can reduce the operating force of the handle. Background Technology

[0002] Ultra-high pressure manual hydraulic pumps, as a simple and convenient hydraulic power source, are widely used in shipbuilding, coal mining machinery, petrochemicals, metallurgy, power, and heavy machinery industries. In existing technologies, a handle moves the pump core upwards to draw oil from the tank. When the handle moves the pump core downwards, the downward pressure on the hydraulic oil causes the oil pressure to rise, requiring the ball valve to open before the oil returns to the tank. When the handle moves the pump core upwards again to draw oil from the tank, the pressure at the ball valve decreases and it closes. When the pump core moves downwards again, the oil pressure needs to reach the pressure required to open the ball valve before it can open and return the oil to the tank. This causes the handle to be pulled downwards due to excessive hydraulic pressure, requiring a large downward pressure and increasing the operating force of the handle. Therefore, an ultra-high pressure manual hydraulic pump that reduces the operating force of the handle is proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the above problems by proposing an ultra-high pressure manual hydraulic pump that can reduce the operating force of the handle.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an ultra-high pressure manual hydraulic pump that reduces the operating force of a handle, comprising an oil tank, a pump core assembly connected to the oil tank, a handle rotatably mounted on the pump core assembly, and a handle mounted on the handle; characterized in that the pump core assembly includes a valve block, a front seat mounted on the valve block, a dual-speed pump core, a low-pressure safety valve, and a high-pressure safety valve; the valve block is provided with a main oil suction channel, a large pump core oil suction channel and a small pump core oil suction channel connected to the main oil suction channel and the dual-speed pump core, and a return oil channel connecting the main oil suction channel and the low-pressure safety valve to directly transport high-pressure oil back to the oil tank to reduce the operating force of the handle; the valve block is also provided with a low-pressure relief channel in which the low-pressure safety valve is installed and connected to the return oil channel and the large pump core oil suction channel.

[0005] Preferably, the front seat is provided with a low-pressure drain port communicating with the low-pressure safety valve, a high-pressure drain port communicating with the high-pressure safety valve, and a first oil suction port and a second oil suction port communicating with the main oil suction channel.

[0006] Preferably, the main oil suction channel is equipped with an oil suction check valve, a low-pressure check valve, and a high-pressure check valve.

[0007] Preferably, the main oil suction channel is also connected to a high-pressure relief channel that is connected to a high-pressure safety valve.

[0008] Preferably, the valve block is also equipped with a drain valve and a drain channel connected to the oil tank inside the valve block; the front seat is provided with a drain valve return port that communicates with the pressure relief channel.

[0009] Preferably, the valve block is also equipped with an oil outlet and a connecting channel inside the valve block that connects the oil drain valve and the oil return channel.

[0010] Preferably, a connecting rod is also installed on the valve block, allowing the handle to be rotatably mounted on the valve block; the handle is also connected to the dual-speed pump core, driving the dual-speed pump core to move up and down.

[0011] Preferably, the lifting handle is also equipped with a handle; the handle is equipped with a handle sleeve.

[0012] Preferably, one end of the fuel tank is connected to the front seat, and the other end is also equipped with a rear seat; a tensioning rod is installed between the front seat and the rear seat.

[0013] Preferably, one end of the tensioning rod is connected to the front seat, and the other end passes through the rear seat and is fitted with a cap-shaped nut.

[0014] The beneficial effects of this utility model are as follows: When the hydraulic oil is pressed down by the dual-speed pump core, the hydraulic oil in the suction channels of the large pump core and the small pump core enters the return channel through the main suction channel, and then opens the low-pressure safety valve through the low-pressure relief channel, keeping the low-pressure safety valve open. The hydraulic oil returns to the oil tank through the low-pressure safety valve. When the dual-speed pump core draws oil again and presses down, the hydraulic oil in the suction channel of the large pump core directly returns to the oil tank through the low-pressure relief channel and the low-pressure safety valve, reducing the pressure of the hydraulic oil, thereby reducing the force of the handle's downward pressure and thus reducing the operating force of the handle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the pump core assembly of this utility model.

[0017] Figure 3 This is a structural schematic diagram of the pump core assembly of this utility model from another perspective.

[0018] Figure 4 This is a cross-sectional view of the main oil suction channel of this utility model.

[0019] Figure 5 This is a cross-sectional view of the low-pressure check valve and the high-pressure check valve of this utility model.

[0020] Figure 6 This is a cross-sectional view of the oil outlet of this utility model.

[0021] Figure 7This is a cross-sectional view of the oil suction channel of the small pump core of this utility model.

[0022] Figure 8 This is a cross-sectional view of the oil suction channel of the large pump core of this utility model.

[0023] Figure 9 This is a cross-sectional view of the low-pressure safety valve of this utility model.

[0024] Figure 10 This is a cross-sectional view of the high-pressure check valve of this utility model.

[0025] Figure 11 This is a cross-sectional view of the oil drain channel of this utility model.

[0026] Legend: 1. Oil tank; 2. Pump core assembly; 201. Valve block; 202. Front seat; 203. Dual-speed pump core; 204. Low-pressure safety valve; 205. High-pressure safety valve; 206. Main suction channel; 207. Large pump core suction channel; 208. Small pump core suction channel; 209. Return channel; 210. Low-pressure relief channel; 211. Low-pressure drain port; 212. High-pressure drain port; 213. First suction port; 214. Second oil suction port; 215. Oil suction check valve; 216. Low-pressure check valve; 217. High-pressure check valve; 218. High-pressure relief channel; 219. Oil drain valve; 220. Oil drain channel; 221. Oil drain valve return port; 222. Oil outlet; 223. Connecting channel; 224. Connecting rod; 225. Tensioning rod; 226. Cap nut; 227. Rear seat; 3. Lifting handle; 4. Handle; 401. Handle sleeve. Detailed Implementation

[0027] The following description, in conjunction with the accompanying drawings, further illustrates the ultra-high pressure manual hydraulic pump of this utility model that reduces the force required to operate the handle.

[0028] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0029] See appendix Figure 1-10As shown, this embodiment discloses an ultra-high pressure manual hydraulic pump that reduces the operating force of the handle, including an oil tank 1, a pump core assembly 2 connected to the oil tank 1, a handle 3 rotatably mounted on the pump core assembly 2, and a handle 4 mounted on the handle 3; characterized in that the pump core assembly 2 includes a valve block 201, a front seat 202 mounted on the valve block 201, a dual-speed pump core 203, a low-pressure safety valve 204, and a high-pressure safety valve 205; the valve block 201 is provided with a main oil suction channel 206, a large pump core oil suction channel 207 and a small pump core oil suction channel 208 connected to the main oil suction channel 206 and the dual-speed pump core 203, and a return oil channel 209 connecting the main oil suction channel 206 and the low-pressure safety valve 204 to directly transport high-pressure oil back to the oil tank 1 to reduce the operating force of the handle 4; the valve block 201 is also provided with a safety valve 205. A low-pressure relief channel 210 is installed, which is connected to the low-pressure safety valve 204 and the return oil channel 209 and the large pump core suction channel 207. When the hydraulic oil is pressed down by the dual-speed pump core 203, the hydraulic oil in the large pump core suction channel 207 and the small pump core suction channel 208 enters the return oil channel 209 through the main suction channel 206, and then opens the low-pressure safety valve 204 through the low-pressure relief channel 210. The low-pressure safety valve 204 is kept open, and the hydraulic oil returns to the oil tank 1 through the low-pressure safety valve 204. When the dual-speed pump core 203 sucks oil again and presses down, the hydraulic oil in the large pump core suction channel 207 directly returns to the oil tank 1 through the low-pressure relief channel 210 and the low-pressure safety valve 204, reducing the pressure of the hydraulic oil, thereby reducing the downward pressure of the handle 4 and thus reducing the operating force of the handle 4.

[0030] See appendix Figure 4-6 As shown, the front seat 202 is provided with a low-pressure drain port 211 communicating with the low-pressure safety valve 204, a high-pressure drain port 212 communicating with the high-pressure safety valve 205, and a first oil suction port 213 and a second oil suction port 214 communicating with the main oil suction channel 206; the main oil suction channel 206 is equipped with an oil suction check valve 215, a low-pressure check valve 216, and a high-pressure check valve 217; the main oil suction channel 206 is also connected to a high-pressure relief valve connected to the high-pressure safety valve 205. The valve block 201 is also equipped with an oil outlet 222 and a connecting channel 223 that connects the oil drain valve 219 and the return oil channel 209 within the valve block 201. The hydraulic oil in the oil tank 1 is drawn into the main oil suction channel 206 through the first oil suction port 213 and the second oil suction port 214, and the oil suction check valve 215 and the low-pressure check valve 216 are pushed open, so that the hydraulic oil enters the large pump core oil suction channel 207 and the small pump core oil suction channel 208, thereby facilitating the oil suction from the oil tank 1.

[0031] See appendix Figure 11As shown, the valve block 201 is also equipped with a drain valve 219 and a drain channel 220 connected to the oil tank 1 inside the valve block 201; the front seat 202 is provided with a drain valve return port 221 that communicates with the pressure relief channel; by loosening the drain valve 219, the hydraulic oil can be directly returned to the oil tank 1 through the drain channel 220 and the drain valve return port 221, thereby facilitating rapid oil draining.

[0032] See appendix Figure 1 As shown, a connecting rod 224 is also installed on the valve block 201, allowing the handle 3 to be rotatably mounted on the valve block 201; the handle 3 is also connected to the dual-speed pump core 203, driving the dual-speed pump core 203 to move up and down; a handle sleeve 401 is installed on the handle 4 on the handle 3; the handle 4 drives the handle 3 to move along the connecting rod 224, and the handle 3 drives the dual-speed pump core 203 to move up and down, thereby facilitating oil suction and increasing the pressure of hydraulic oil.

[0033] See appendix Figure 1 As shown, one end of the oil tank 1 is connected to the front seat 202, and the other end is also equipped with a rear seat; a tension rod 225 is installed between the front seat 202 and the rear seat 227; one end of the tension rod 225 is connected to the front seat 202, and the other end passes through the rear seat 227 and is equipped with a cap nut 226; by connecting one end of the tension rod 225 to the front seat 202 through a thread, and the other end passing through the rear seat 227, and by installing the cap nut 226 through a thread on the tension rod 225, the rear seat 227 is limited, thereby facilitating the connection between the front seat 202 and the rear seat 227.

[0034] In the working process of this utility model, the handle 4 drives the lifting handle 3 to move upward along the connecting rod 224. The lifting handle 3 drives the dual-speed pump core 203 to move upward. The first oil suction port 213 and the second oil suction port 214 draw the hydraulic oil in the oil tank 1 into the main oil suction channel 206, and push open the oil suction check valve 215 and the low-pressure check valve 216, so that the hydraulic oil enters the large pump core oil suction channel 207 and the small pump core oil suction channel 208 and flows to the dual-speed pump core 203. Then, the handle 4 drives the lifting handle 3 to move downward along the connecting rod 224. The lifting handle 3 drives the dual-speed pump core 203 to move downward. The dual-speed pump core 203 presses the hydraulic oil downward. When hydraulic oil is pumped down, it pushes open the high-pressure check valve 217 and flows to the connecting channel 223. From the connecting channel 223, it flows to the return channel 209. Then, from the return channel 209, it pushes open the low-pressure safety valve 204 and returns to the oil tank through the low-pressure relief channel 210. When hydraulic oil is pumped down again in the same manner, the low-pressure safety valve 204 remains open because there is always hydraulic oil pressure in the return channel 209. The hydraulic oil in the large pump core's suction channel 207 will return directly to the oil tank 1 through the low-pressure safety valve 204 and the low-pressure relief channel 210, thereby reducing the hydraulic oil pressure and thus reducing the downward operating force of the handle.

[0035] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. An ultra-high pressure manual hydraulic pump with reduced handle operating force, comprising an oil tank (1), a pump core assembly (2) connected to the oil tank (1), a handle (3) rotatably mounted on the pump core assembly (2), and a handle (4) mounted on the handle (3); characterized in that... The pump core assembly (2) includes a valve block (201), a front seat (202) mounted on the valve block (201), a dual-speed pump core (203), a low-pressure safety valve (204), and a high-pressure safety valve (205). The valve block (201) is provided with a main oil suction channel (206), a large pump core oil suction channel (207) and a small pump core oil suction channel (208) connected to the main oil suction channel (206) and the dual-speed pump core (203), and a return oil channel (209) connecting the main oil suction channel (206) and the low-pressure safety valve (204) to directly transport high-pressure oil back to the oil tank (1) and reduce the operating force of the handle (4). The valve block (201) is also provided with a low-pressure relief channel (210) in which the low-pressure safety valve (204) is installed and connected to the return oil channel (209) and the large pump core oil suction channel (207).

2. The ultra-high pressure hand-operated hydraulic pump capable of reducing handle operating force according to claim 1, characterized in that: The front seat (202) is provided with a low-pressure drain port (211) communicating with the low-pressure safety valve (204), a high-pressure drain port (212) communicating with the high-pressure safety valve (205), and a first oil suction port (213) and a second oil suction port (214) communicating with the main oil suction channel (206).

3. The superhigh-pressure hand-operated hydraulic pump capable of reducing handle operating force according to claim 2, characterized in that: The main oil suction channel (206) is equipped with an oil suction check valve (215), a low-pressure check valve (216) and a high-pressure check valve (217).

4. The ultra-high pressure manual hydraulic pump with reduced handle operating force according to claim 2, characterized in that: The main oil suction channel (206) is also connected to a high pressure relief channel (218) that is connected to the high pressure safety valve (205).

5. The ultra-high pressure hand-operated hydraulic pump of claim 1, wherein: The valve block (201) is also equipped with an oil drain valve (219) and an oil drain channel (220) connected to the oil tank (1) inside the valve block (201); the front seat (202) is provided with an oil drain valve return port (221) that communicates with the pressure relief channel.

6. The superhigh-pressure hand-operated hydraulic pump capable of reducing handle operating force according to claim 5, characterized in that: The valve block (201) is also equipped with an oil outlet (222) and a connecting channel (223) that connects the oil drain valve (219) and the oil return channel (209) inside the valve block (201).

7. The superhigh-pressure hand-operated hydraulic pump capable of reducing handle operating force according to claim 1, characterized in that: A connecting rod (224) is also installed on the valve block (201) so that the handle (3) can be rotatably installed on the valve block (201); the handle (3) is also connected to the dual-speed pump core (203) and drives the dual-speed pump core (203) to move up and down.

8. The superhigh-pressure hand-operated hydraulic pump capable of reducing handle operating force according to claim 7, characterized in that: A handle sleeve (401) is installed on the handle (4) of the lifting handle (3).

9. The ultra-high pressure hand-operated hydraulic pump of claim 1, wherein: One end of the oil tank (1) is connected to the front seat (202), and the other end is also equipped with a rear seat (227); a tension rod (225) is installed between the front seat (202) and the rear seat (227).

10. The ultra-high pressure manual hydraulic pump with reduced handle operating force according to claim 9, characterized in that: One end of the tensioning rod (225) is connected to the front seat (202), and the other end passes through the rear seat and is fitted with a cap nut (226).

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