A fluid dispensing system

Abstract

The utility model provides a kind of fluid distribution system, including oil storage device, quantitative pump, distribution valve group and control box, the liquid inlet of quantitative pump is connected with the liquid outlet of oil storage device, distribution valve group includes liquid inlet pipe and several valves, the liquid inlet of several valves is all communicated with the liquid outlet of liquid inlet pipe, the liquid inlet of liquid inlet pipe is communicated with the liquid outlet of quantitative pump, valve is equipped with conducting device.In the application, the liquid inlet and the liquid outlet of valve are communicated by controlling the conducting device with control box, and the fluid flow to the corresponding pipeline is accurately controlled by the on-off of the distribution valve, which realizes automatic control and effectively avoids errors.

Description

Technical Field

[0001] This utility model relates to the field of oil injection technology, and in particular to a fluid distribution system. Background Technology

[0002] In mechanical production, hydraulic systems often experience a drop in oil level due to leaks or oil consumption during normal use. If the hydraulic oil level falls below the specified standard position, it may cause abnormal operation of the hydraulic system, thus requiring the replenishment of hydraulic oil. The hydraulic system has a central pneumatic pump as its power source. A distribution valve connected to the pneumatic pump receives the high-pressure hydraulic oil pumped in and quantitatively distributes it according to a preset metering ratio or volume, sequentially or simultaneously distributing the hydraulic oil to the various branch pipelines connected to it.

[0003] In the existing technology, some traditional distribution valves rely on manual or manual adjustment, which cannot achieve fully automated control, resulting in complicated operation and easy errors. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a fluid distribution system that aims to solve the problem that some traditional distribution valves in the prior art rely on manual or manual adjustment, cannot achieve fully automated control, and are therefore complicated to operate and prone to errors.

[0005] This utility model provides a fluid distribution system, including an oil storage device, a metering pump, a distribution valve assembly, and a control box. The inlet of the metering pump is connected to the outlet of the oil storage device. The distribution valve assembly includes an inlet pipe and several valves. The inlets of the several valves are all connected to the outlets of the inlet pipe. The outlet of the metering pump is connected to the inlet of the inlet pipe. Each valve is equipped with a connecting device. The control box is used to control the connecting device to connect the inlet and outlet of the valve.

[0006] In some embodiments of this utility model, the guiding device includes an elastic member, a small pressure bead, a large pressure bead, and a striker. The large pressure bead has a first flow channel. The diameter of the small pressure bead is smaller than the diameter of the large pressure bead but larger than the diameter of the first flow channel. A second flow channel is formed inside the valve. The elastic member is used to drive the small pressure bead to block the first flow channel and to drive the large pressure bead to block the second flow channel. The striker includes a top, a middle, and a tail arranged sequentially. The top is housed in the first flow channel and forms a first gap with the first flow channel. The middle is housed in the second flow channel and forms a second gap with the second flow channel. A gap is maintained between the middle and the large pressure bead. The tail extends outside the valve. The tail is used to input power to drive the top to first push open the small pressure bead to open the first flow channel, and then drive the middle to push open the large pressure bead to open the second flow channel.

[0007] In some embodiments of this utility model, the control box includes a box body, a pneumatic valve group and a plurality of cylinders. The pneumatic valve group is disposed in the box body, and the plurality of cylinders are arranged in a one-to-one correspondence with the plurality of tail sections. The pneumatic valve group is used to drive the cylinders to extend and retract to drive the tail sections.

[0008] In some embodiments of this utility model, the metering pump includes a housing, a pump rod assembly, a piston assembly, and a venting valve assembly. The housing includes a pump chamber, a connecting chamber, and a power chamber. The inlet of the pump rod assembly is connected to the outlet of the oil storage device. The piston assembly is movably disposed in the pump chamber and connected to the pump rod assembly. The venting valve assembly is movably disposed in the power chamber. The connecting chamber connects the pump chamber and the power chamber. The power chamber has an air inlet, and the connecting chamber has an air outlet. The air inlet allows airflow to enter the power chamber to drive the venting valve assembly to reciprocate. The venting valve changes the airflow direction between itself and the connecting chamber through reciprocating motion to drive the piston assembly to reciprocate. The piston assembly drives the pump rod assembly to draw oil from the oil storage device into the inlet pipe through reciprocating motion.

[0009] In some embodiments of this utility model, the ventilation valve assembly includes a first sealing element, a second sealing element, a ventilation valve stem, and a ventilation valve plug. The first sealing element is disposed within the power chamber and forms a plurality of mutually isolated first isolation chambers with the power chamber. The power chamber has a plurality of first ventilation holes for connecting the connecting chamber and the first isolation chambers. The second sealing element is disposed within the first sealing element and forms a plurality of mutually isolated second isolation chambers with the first sealing element. The second sealing element has a plurality of mutually isolated third isolation chambers inside. The first sealing element has a second ventilation hole for connecting the first isolation chamber and the connecting chamber. The second isolation chamber has a third vent hole on the second sealing member. The third vent hole is used to connect the second isolation chamber and the third isolation chamber. The vent valve stem includes a sealing part and a venting part. The sealing part and the venting part are provided in a plurality of alternating arrangements. The vent valve stem passes through the second sealing member. The vent valve plug is provided on the end of the vent valve stem that extends outside the second sealing member. The diameter of the sealing part is larger than the diameter of the venting part. The vent valve plug is used to drive the vent valve stem to reciprocate so that the sealing part connects two adjacent third isolation chambers and the venting part connects two adjacent third isolation chambers.

[0010] In some embodiments of this utility model, the sealing part and the venting part are connected by an inclined part, and a first through hole is provided at the connection between the sealing part and the inclined part, the first through hole extending along the radial direction of the venting valve stem.

[0011] In some embodiments of this utility model, the pump chamber is provided with a fourth ventilation hole, a fifth ventilation hole, and a first air outlet. The communicating cavity includes an air outlet cavity and several ventilation cavities. The air outlet is opened on the air outlet cavity. The ventilation cavity is provided with a guide member, which divides the ventilation cavity into a first guide cavity and a second guide cavity. The fourth ventilation hole is used to connect the pump chamber and the first guide cavity. The fifth ventilation hole is used to connect the pump chamber and the second guide cavity. The first air outlet is used to connect the air outlet cavity and the pump chamber. When the piston assembly reciprocates between the first stroke dead point and the second stroke dead point in the pump chamber, the fourth ventilation hole and the fifth ventilation hole are isolated from each other, and the first air outlet is connected to the fifth ventilation hole. When the piston assembly moves to the first stroke dead point or the second stroke dead point in the pump chamber, the fourth ventilation hole and the fifth ventilation hole are connected to each other, and the first air outlet is connected to the fifth ventilation hole.

[0012] In some embodiments of this utility model, the first ventilation hole includes a first ventilation hole one, a first ventilation hole two, and a first ventilation hole three. The first ventilation hole one is used to connect the first air guiding cavity and the first isolation cavity, the first ventilation hole two is used to connect the second air guiding cavity and the first isolation cavity, and the first ventilation hole three is used to connect the air outlet cavity and the first isolation cavity.

[0013] In some embodiments of this utility model, the air outlet cavity is provided with a third insulating member and a fourth insulating member. The third insulating member is provided with a hollow channel, which passes through the third insulating member along its axial direction. The fourth insulating member is provided with a spring and a sealing member. The sealing member is movably disposed in the fourth insulating member. The spring is used to drive the sealing member to seal one end of the hollow channel.

[0014] In some embodiments of this utility model, the housing is provided with a silencer box, and the air outlet is connected to the interior of the silencer box.

[0015] Beneficial Effects: This utility model provides a fluid distribution system, including an oil storage device, a metering pump, a distribution valve assembly, and a control box. The inlet of the metering pump is connected to the outlet of the oil storage device. The distribution valve assembly includes an inlet pipe and several valves, the inlets of which are all connected to the outlets of the inlet pipe. The outlet of the metering pump is connected to the inlet of the inlet pipe. The valves are equipped with a connecting device. In this application, the connecting device is controlled by the control box to connect the inlet and outlet of the valve. By controlling the on / off state of the distribution valve, the fluid flow rate distributed to the corresponding pipe can be precisely controlled, achieving automated control and effectively avoiding errors. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the fluid distribution system of this utility model;

[0018] Figure 2 This is a schematic diagram of the fluid distribution system of this utility model from another perspective;

[0019] Figure 3 This is a schematic diagram of the internal structure of the fluid distribution system of this utility model;

[0020] Figure 4 This is a top view of the metering pump of this utility model;

[0021] Figure 5 This is a cross-sectional view of the metering pump along the AA direction in condition 1.

[0022] Figure 6 This is a cross-sectional view of the metering pump along the AA direction in state two.

[0023] Figure 7 This is a cross-sectional view of the metering pump along the BB direction in state two.

[0024] Figure 8 This is a cross-sectional view of the metering pump along the AA direction in state three.

[0025] Figure 9 This is a cross-sectional view of the metering pump along the BB direction in state three.

[0026] Figure 10 This is a cross-sectional view of the metering pump along the AA direction in state four.

[0027] Figure 11 This is a cross-sectional view of the metering pump along the BB direction in state four.

[0028] Figure 12 This is a cross-sectional view of the metering pump along the AA direction in state five.

[0029] Figure 13 This is a cross-sectional view of the metering pump along the BB direction in state five.

[0030] Figure 14 This is a cross-sectional view of the metering pump along the AA direction in state six.

[0031] Figure 15 This is a cross-sectional view of the metering pump along the BB direction in state six.

[0032] Figure 16 This is a cross-sectional view of the fixed displacement pump along the CC direction;

[0033] Figure 17 This is a diagram of the internal structure of the vent valve stem when it is in the middle position.

[0034] Figure 18 This is a schematic diagram of the structure when the third insulating element is opened;

[0035] Figure 19 This is a cross-sectional view of the fixed displacement pump along the DD direction;

[0036] Figure 20 This is a schematic diagram of the internal structure of the pump chamber;

[0037] Figure 21 A schematic diagram of the internal structure of the septic valve stem and septic valve plug;

[0038] Figure 22This is a schematic diagram of the internal structure of the valve;

[0039] Figure 23 A schematic diagram of the valve's internal structure from another perspective;

[0040] Figure 24 This is a schematic diagram of the internal structure of the pump rod assembly.

[0041] In the picture:

[0042] 1. Oil storage device; 2. Metering pump; 21. Housing; 211. Pump chamber; 212. Connecting chamber; 2121. Ventilation chamber; 2122. Ventilation outlet chamber; 2124. Air guide component; 2125. First air guide chamber; 2126. Second air guide chamber; 213. Power chamber; 214. Air inlet; 215. Air outlet; 22. Pump rod assembly; 221. Steel ball; 23. Piston assembly; 231. Upper piston 232. Lower piston cover; 233. Connecting rod; 24. Ventilation valve assembly; 241. First seal; 242. Second seal; 243. Ventilation valve rod; 244. Ventilation valve plug; 245. First isolation chamber; 2461. First ventilation port one; 2462. First ventilation port two; 2463. First ventilation port three; 247. Second isolation chamber; 248. Third isolation chamber; 249. Second ventilation port; 250. Third ventilation port; 251. Sealing part; 252. Ventilation part; 253. Beveled part; 254. First through hole; 255. Second through hole; 256. Fourth ventilation port; 257. Fifth ventilation port; 258. First vent; 259. Third isolation member; 260. Fourth isolation member; 261. Spring; 262. Sealing member; 263. Fourth isolation chamber; 264. Partition; 3. Distribution valve assembly; 31. Inlet pipe; 32. Valve; 33. Conducting device; 331. Elastic component; 332. Small pressure ball; 333. Large pressure ball; 334. Strike pin; 3341. Top; 3342. Middle; 3343. Tail; 335. First flow guide channel; 336. Second flow guide channel; 4. Control box; 41. Box body; 42. Pneumatic valve assembly; 43. Cylinder; 5. Silencer box. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0044] Please see Figures 1 to 24This utility model provides a fluid distribution system, including an oil storage device 1, a metering pump 2, a distribution valve group 3, and a control box 4. The inlet of the metering pump 2 is connected to the outlet of the oil storage device 1. The distribution valve group 3 includes an inlet pipe 31 and several valves 32. The inlets of the several valves 32 are all connected to the outlets of the inlet pipe 31. The outlet of the metering pump 2 is connected to the inlet of the inlet pipe 31. Each valve 32 is provided with a connecting device 33. The control box 4 is used to control the connecting device 33 to connect the inlet and outlet of the valve 32.

[0045] In this application, the control box 4 controls the conduction device 33 to connect the inlet and outlet of the valve 32. By controlling the opening and closing of the distribution valve group 3, the flow rate of the fluid distributed to the corresponding pipeline can be precisely controlled, realizing automated control and effectively avoiding errors.

[0046] The control box 4 is equipped with a PLC and a pneumatic valve assembly 42, which controls the conduction device 33. The PLC performs calculations, and the pneumatic valve assembly 42 controls the conduction device 33 for management and distribution. The metering pump 2 pushes the fluid to achieve precise single-point control without crossflow, stable high-pressure operation, and accurate regulation of the fluid under high-pressure conditions, while reducing the failure rate.

[0047] In this application, the pump rod structure extracts fluid through volume changes in its internal chambers and the steel ball 221. The pump rod structure can adopt a conventional structure in the art, which will not be described in detail here.

[0048] In existing technologies, distribution valves contain a sealing structure that controls the flow of fluid. When this sealing structure needs to be opened to allow fluid to pass through, the fluid itself exerts significant pressure on it, requiring a large driving force to open it. This is especially true for long-distance fluid transport, where an even greater driving force is needed. When the driving force provided by the distribution valve is insufficient, problems such as valve jamming and blockage can easily occur. Therefore, there is an urgent need for a more stable distribution valve.

[0049] In some embodiments of this utility model, the guiding device 33 includes an elastic member 331, a small pressure bead 332, a large pressure bead 333, and a striking pin 334. The large pressure bead 333 has a first flow channel 335. The diameter of the small pressure bead 332 is smaller than the diameter of the large pressure bead 333 but larger than the diameter of the first flow channel 335. The valve 32 has a second flow channel 336. The elastic member 331 is used to drive the small pressure bead 332 to block the first flow channel 335 and to drive the large pressure bead 333 to block the second flow channel 336. The striking pin 334 includes a top 3341, a middle 3342, and a tail arranged sequentially. The valve 32 has a top portion 3341 housed within the first flow channel 335 and forming a first gap with the first flow channel 335; a middle portion 3342 housed within the second flow channel 336 and forming a second gap with the second flow channel 336; a gap is maintained between the middle portion 3342 and the large pressure bead 333; and a tail portion 3343 extends outside the valve 32. The tail portion 3343 is used to input power to drive the top portion 3341 to first push open the small pressure bead 332 to open the first flow channel 335, and then drive the middle portion 3342 to push open the large pressure bead 333 to open the second flow channel 336.

[0050] Because the elastic pressure provided by the elastic member 331 in this embodiment seals the small pressure bead 332 at the top of the first flow channel 335, and transmits the pressure to the large pressure bead 333 through the small pressure bead 332, the large pressure bead 333 also seals the top of the second flow channel 336. At this time, the fluid is blocked in the first flow channel 335 and the second flow channel 336 by the large pressure bead 333 and the small pressure bead 332, that is, the inlet and outlet are not connected. When it is necessary to output fluid from the outlet, the tail 3343 drives the top 3341 and the middle 3342 to move upward. Since there is a gap between the middle 3342 and the large pressure bead 333, the top 3341 first drives the small pressure bead 332 to move upward, opening the first flow channel 335. At this time, the fluid enters the first gap, and the middle 3342 and the large pressure bead 333 maintain a gap. As the top 3341 and middle 3342 continue to move upward, the middle 3342, together with the large pressure bead 333, pushes the large pressure bead 333 upward, opening the second flow channel 336. Fluid enters the second gap and then exits from the outlet. During this process, because the volume of the large pressure bead 333 is larger than that of the small pressure bead 332, the pressure exerted by the fluid on the large pressure bead 333 is greater than the pressure exerted on the small pressure bead 332. The top 3341 requires only a small force to push the small pressure bead 332 upward. Opening the through hole allows for a small flow of fluid, effectively relieving pressure on the large pressure bead 333. After the pressure inside valve 32 decreases, the middle 3342 can then use a small force to push the large pressure bead 333 upward, opening the second flow channel 336 and enabling a large flow of fluid. When the power to the tail section 3343 is removed, the pressure of the elastic member 331 can press down the small pressure ball 332 and the large pressure ball 333 to seal again. In this way, the large pressure ball 333 and the small pressure ball 332 can seal in stages, which can reduce the driving force required for fluid conduction, thereby effectively reducing the jamming and blockage that occurs during operation and improving the working stability of the distribution valve.

[0051] In some embodiments of this utility model, the control box 4 includes a box body 41, a pneumatic valve assembly 42 and a plurality of cylinders 43. The pneumatic valve assembly 42 is disposed inside the box body 41. The plurality of cylinders 43 are arranged in a one-to-one correspondence with the plurality of tail sections 3343. The pneumatic valve assembly 42 is used to drive the cylinders 43 to extend and retract to drive the tail sections 3343.

[0052] In some embodiments of this utility model, the metering pump 2 includes a housing 21, a pump rod assembly 22, a piston assembly 23, and a vent valve assembly 24. The housing 21 includes a pump chamber 211, a connecting chamber 212, and a power chamber 213. The inlet of the pump rod assembly 22 is connected to the outlet of the oil storage device 1. The piston assembly 23 is movably disposed within the pump chamber 211 and connected to the pump rod assembly 22. The vent valve assembly 24 is movably disposed within the power chamber 213. The connecting chamber 212 is used to connect the pump chamber 211. 1 and the power chamber 213, the power chamber 213 has an air inlet 214, the connecting chamber 212 has an air outlet 215, the air inlet 214 allows airflow to enter the power chamber 213 to drive the air exchange valve assembly 24 to reciprocate, the air exchange valve changes the airflow direction between itself and the connecting chamber 212 through reciprocating motion to drive the piston assembly 23 to reciprocate, the piston assembly 23 drives the pump rod assembly 22 to draw oil from the oil storage device 1 into the liquid inlet pipe 31 through reciprocating motion.

[0053] In some embodiments of this utility model, the ventilation valve assembly 24 includes a first sealing member 241, a second sealing member 242, a ventilation valve stem 243, and a ventilation valve plug 244. The first sealing member 241 is disposed within the power chamber 213 and forms a plurality of mutually isolated first isolation chambers 245 with the power chamber 213. The power chamber 213 has a plurality of first ventilation holes for connecting the connecting chamber 212 and the first isolation chambers 245. The second sealing member 242 is disposed within the first sealing member 241 and forms a plurality of mutually isolated second isolation chambers 247 with the first sealing member 241. The interior of the second sealing member 242 has a plurality of mutually isolated third isolation chambers 248. The first sealing member 241 has a second ventilation hole 249 for connecting the first isolation chamber 245 and the second isolation chambers 247. The second sealing member 242 has a third vent hole 250 in cavity 247. The third vent hole 250 is used to connect the second isolation cavity 247 and the third isolation cavity 248. The vent valve stem 243 includes a sealing part 251 and a venting part 252. The sealing part 251 and the venting part 252 are provided in a plurality of alternating arrangements. The vent valve stem 243 passes through the second sealing member 242. The vent valve plug 244 is provided on the end of the vent valve stem 243 that extends outside the second sealing member 242. The diameter of the sealing part 251 is larger than the diameter of the venting part 252. The vent valve plug 244 is used to drive the vent valve stem 243 to reciprocate so that the sealing part 251 connects two adjacent third isolation cavities 248 and the venting part 252 connects the two adjacent third isolation cavities 248.

[0054] In some embodiments of this utility model, the pump chamber 211 is provided with a fourth ventilation hole 256, a fifth ventilation hole 257, and a first air outlet 258. The connecting cavity 212 includes an air outlet cavity 2122 and several ventilation cavities 2121. The air outlet 215 is provided on the air outlet cavity 2122. The ventilation cavity 2121 is provided with a guide member 2124, which divides the ventilation cavity 2121 into a first guide cavity 2125 and a second guide cavity 2126. The fourth ventilation hole 256 is used to connect the pump chamber 211 and the first guide cavity 2125. The fifth ventilation hole 257 is used to connect the pump chamber and the... The second air guide chamber 2126 is described above. The first air outlet 258 is used to connect the air outlet chamber 2122 and the pump chamber 211. When the piston assembly 23 reciprocates between the first stroke dead point and the second stroke dead point in the pump chamber 211, the fourth air exchange port 256 and the fifth air exchange port 257 are isolated from each other, and the first air outlet 258 is connected to the fifth air exchange port 257. When the piston assembly 23 moves to the first stroke dead point or the second stroke dead point in the pump chamber 211, the fourth air exchange port 256 and the fifth air exchange port 257 are connected to each other, and the first air outlet 258 is connected to the fifth air exchange port 257.

[0055] In some embodiments of this utility model, the first ventilation hole includes a first ventilation hole 2461, a first ventilation hole 2462, and a first ventilation hole 2463. The first ventilation hole 2461 is used to connect the first air guiding chamber 2125 and the first isolation chamber 245. The first ventilation hole 2462 is used to connect the second air guiding chamber 2126 and the first isolation chamber 245. The first ventilation hole 2463 is used to connect the air outlet chamber 2122 and the first isolation chamber 245.

[0056] To facilitate understanding and explanation, the working principle of the metering pump 2 will be explained in conjunction with the above-mentioned embodiments.

[0057] Reference Figure 5 ,by Figure 5 To illustrate the starting point of the circulation, the arrows in the diagram indicate the direction of gas flow. Specifically, the venting valve stem 243 in this application includes three sealing portions 251 and two venting portions 252. The two venting portions 252 are located between two adjacent sealing portions 251, and two adjacent third isolation chambers 248 are separated by a partition 264. Furthermore, two venting valve plugs 244 are provided, each located on one of the sealing portions 251 at both ends. The piston assembly 23 includes an upper piston cover 231, a lower piston cover 232, and a connecting rod 233. The connecting rod 233 connects the upper piston cover 231 and the lower piston cover 232, forming a gap between them. Figure 5As shown, the uppermost vent valve plug 244 abuts against the upper end of the power chamber 213, while the lowermost vent valve plug 244 is separated from the lower end of the power chamber 213. A gap is formed between the uppermost vent 252 and the uppermost partition 264. The middle sealing part 251 seals against the partition 264 in the upper-middle position. A gap is formed between the lowermost vent 252 and the partition 264 in the lower-middle position, and a seal is formed between the lowermost sealing part 251 and the lowermost partition 264. Therefore, the airflow entering from the air inlet 214 sequentially passes through the first isolation chamber 245, the second vent 249, the second isolation chamber 247, and the third vent 250 in the middle position before entering the middle third isolation chamber 248. The airflow in the middle third isolation chamber 248 continues to enter the middle third isolation chamber 248 from the gap between the lowermost vent 252 and the partition 264 in the lower-middle position. Because the airflow is blocked by the bottommost sealing part 251 and the bottommost partition 264, the airflow from the third isolation chamber 248 in the middle and lower position enters the ventilation chamber 2121 in the middle position through the third ventilation hole 250, the second isolation chamber 247, the second ventilation hole 249, the first isolation chamber 245, and the first ventilation hole 2461. Since the ventilation chamber 2121 in the middle position is provided with an air guide 2124, the airflow is forced to enter the pump chamber 211 along the first air guide chamber 2125 through the fourth ventilation hole 256. At this time, the lower piston cover 232 is at the bottom of the pump chamber 211, that is, at the stroke dead point, so under the action of the airflow, it pushes the lower piston cover 232 to move upward.

[0058] Reference Figure 6 and Figure 7 The lower piston cover 232 drives the upper piston cover 231 to move upward, compressing the upper space in the pump chamber 211. The airflow enters the first air guide chamber 2125 from the fourth air exchange hole 256 on the outermost air exchange chamber 2121, then enters the third isolation chamber 248 in the middle and upper position from the first air exchange hole 2461 on the first air guide chamber 2125, then enters the uppermost second isolation chamber 247 from the gap between the uppermost vent 252 and the uppermost partition 264, and finally enters the exhaust chamber 2122 from the second air exchange hole 249 and the first air exchange hole 2463 in sequence. The airflow is finally discharged from the exhaust port 215 on the exhaust chamber 2122.

[0059] Reference Figure 8 and Figure 9When the upper piston cover 231 is displaced to the uppermost end of the pump chamber 211, that is, at the stroke dead end, the fourth air exchange hole 256 and the fifth air exchange hole 257 on the air exchange chamber 2121 in the middle position are connected. The airflow enters the second air guide chamber 2126 in the middle position from the fifth air exchange hole 257. The airflow in the second air guide chamber 2126 enters the first isolation chamber 245 from the first air exchange hole 2462, pushing the uppermost air exchange valve plug 244 to move downward, pushing the airflow in the uppermost second isolation chamber 247 to enter the exhaust chamber 2122 from the first air exchange hole 2463, and then being discharged from the exhaust hole of the exhaust chamber 2122. The uppermost vent valve plug 244 moves downward, and the compressed airflow enters the first isolation chamber 245 through the second vent hole 249 in the uppermost second isolation chamber 247. The airflow in the first isolation chamber 245 enters the outlet chamber 2122 through the first vent hole 2463 and is discharged from the outlet 215 of the outlet chamber 2122. At the same time, the lowermost vent valve plug 244 moves downward, and the compressed airflow enters the first isolation chamber 245 through the second vent hole 249 in the uppermost second isolation chamber 247. The airflow in the first isolation chamber 245 enters the second air guide chamber 2126 through the second vent hole 2462, and the airflow in the second air guide chamber 2126 enters the pump chamber 211 through the fifth vent hole 257. Since the first vent 258 and the fifth vent 257 are located in the gap between the upper piston cover 231 and the lower piston cover 232, the gas that can flow out from the fifth vent 257 can enter the vent chamber 2122 from the first vent 258 and be discharged from the vent 215 of the vent chamber 2122.

[0060] Reference Figure 10 and Figure 11At this time, the uppermost air valve plug 244 is separated from the upper end of the power chamber 213, the lowermost air valve plug 244 abuts against the lower end of the power chamber 213, a seal is formed between the uppermost vent 252 and the uppermost partition 264, a gap is formed between the middle sealing part 251 and the partition 264 in the upper middle position, a seal is formed between the lowermost vent 252 and the partition 264 in the lower middle position, and a gap is formed between the lowermost sealing part 251 and the lowermost partition 264. Therefore, the airflow entering from the inlet 214 sequentially passes through the first isolation chamber 245, the second ventilation hole 249, the second isolation chamber 247, and the third ventilation hole 250 in the middle position, entering the middle third isolation chamber 248. The airflow in the middle third isolation chamber 248 continues to enter the upper middle third isolation chamber 248 through the gap between the uppermost vent 252 and the partition 264 in the upper middle position. Because the airflow is blocked by the uppermost sealing part 251 and the uppermost partition 264, the airflow in the upper middle third isolation chamber 248 enters the outermost ventilation chamber 2121 through the third ventilation hole 250, the second isolation chamber 247, the second ventilation hole 249, the first isolation chamber 245, and the first ventilation hole 2461. Since the ventilation chamber 2121 in the middle position is equipped with an air guide 2124, the airflow is forced along the first air guide chamber 2125 through the fourth ventilation hole 256 into the pump chamber 211. At this time, the upper piston cover 231 is at the top of the pump chamber 211, that is, at the stroke dead end. Therefore, under the action of airflow, the upper piston cover 231 is pushed to move downward.

[0061] Reference Figure 12 and Figure 13 The upper piston cover 231 drives the lower piston cover 232 to move downward, compressing the lower space in the pump chamber 211. The airflow enters the first air guide chamber 2125 from the fourth air exchange hole 256 on the air exchange chamber 2121 in the middle position, then enters the third isolation chamber 248 in the middle and lower position from the first air exchange hole 2461 on the first air guide chamber 2125, then enters the second isolation chamber 247 at the bottom from the gap between the lowest ventilation part 252 and the lowest partition 264, and finally enters the exhaust chamber 2122 from the first air exchange hole 2463. The airflow is finally discharged from the exhaust port 215 on the exhaust chamber 2122.

[0062] Reference Figure 14 and Figure 15When the piston cap 232 moves to the bottom of the pump chamber 211, i.e. the stroke dead end, the fourth air exchange hole 256 and the fifth air exchange hole 257 on the outermost air exchange chamber 2121 are connected. The airflow enters the second air guide chamber 2126 of the outermost air exchange chamber 2121 from the fifth air exchange hole 257. The airflow in the second air guide chamber 2126 enters the first isolation chamber 245 from the first air exchange hole 2462, pushing the air exchange valve plug 244 at the bottom to move upward, pushing the airflow in the second isolation chamber 247 at the bottom to enter the exhaust chamber 2122 from the first air exchange hole 2463, and then being discharged from the exhaust hole of the exhaust chamber 2122. The lowest-positioned vent valve plug 244 moves downward, allowing compressed airflow to enter the first isolation chamber 245 through the second vent hole 249 in the lowest-positioned second isolation chamber 247. The airflow in the first isolation chamber 245 then enters the outlet chamber 2122 through the first vent hole 2463 and exits through the outlet 215 of the outlet chamber 2122. Simultaneously, the highest-positioned vent valve plug 244 moves upward, allowing compressed airflow to enter the second air guide chamber 2126 in the middle position through the second vent hole 249 in the second isolation chamber 247 and the first vent hole 2462. The airflow in the second air guide chamber 2126 then enters the pump chamber 211 through the fifth vent hole 257. Since the first vent 258 and the fifth vent 257 are located in the gap between the upper piston cover 231 and the lower piston cover 232, the gas that can flow out from the fifth vent 257 can enter the vent chamber 2122 from the first vent 258 and be discharged from the vent of the vent chamber 2122.

[0063] When the uppermost air valve plug 244 moves upward and is pushed to abut against the upper end of the power chamber 213, the operation is performed. Figure 5 The steps are repeated in this way, and the piston assembly 23 drives the pump rod assembly 22 to draw the oil in the oil storage device 1 into the distribution valve group 3.

[0064] In some embodiments of this utility model, the air outlet chamber 2122 is provided with a third insulating member 259 and a fourth insulating member 260. The third insulating member 259 is provided with a hollow channel, which passes through the third insulating member 259 along its axial direction. The fourth insulating member 260 is provided with a spring 261 and a sealing member 262. The sealing member 262 is movably disposed in the fourth insulating member 260. The spring 261 is used to drive the sealing member 262 to seal one end of the hollow channel.

[0065] like Figure 16 and Figure 17As shown, in practical applications, when the airflow entering from the inlet 214 is suddenly interrupted, causing the ventilator 243 to be in the middle position (i.e., when the first through holes 254 on each inclined surface 253 are exactly connected to each of the third isolation chambers 248), the airflow overflows from both the top and bottom directions and flows out entirely from the outlet of the outlet chamber 2122. This results in the ventilator 243 remaining in the middle position and unable to generate power. Since the ventilator 243 is located internally, breaking this balance requires opening the pump housing to adjust the position of the ventilator 243. To solve this problem, a third isolation element 259 and a fourth isolation element 260 are installed inside the outlet chamber 2122. The hollow channel of the third insulating member 259 has three first ventilation holes 2463 arranged from top to bottom below it. The chamber where the lowest ventilation valve plug 244 is located has four second ventilation holes 249 arranged from top to bottom. The hollow channel of the third insulating member 259 is used to connect the uppermost first ventilation hole 2463 with the air outlet 215. The fourth insulating member 260 and the air outlet chamber 2122 form two fourth isolation chambers 263. The two fourth isolation chambers 263 correspond to the first ventilation hole 2463 in the middle position and the first ventilation hole 2463 at the bottom, respectively.

[0066] Because of the third isolating element 259 and the fourth isolating element 260, when the vent valve stem 243 is in the middle position, part of the airflow overflows from the top and flows out from the air outlet 215, while the other part of the airflow overflows from the bottom. Since the lower end of the hollow channel of the third isolating element 259 is blocked by the sealing element 262, the airflow cannot flow out from the air outlet. Therefore, it pushes the lowest vent valve plug 244 downwards, thereby breaking the equilibrium state of the vent valve stem 243 being in the middle position and continuing to flow from... Figure 15 and Figure 16 Start executing the loop state.

[0067] Reference Figure 16 and Figure 17 Because of the presence of a third isolating element 259 and a fourth isolating element 260, when the lowest vent valve plug 244 moves downward, the gas in the vent valve plug 244 and the third isolating chamber 248 needs to be discharged. Therefore, when the vent valve plug 244 moves downward to expose the second vent hole 249 in the upper middle position, the airflow enters the first isolating chamber 245 from the second isolating chamber 247. The airflow in the first isolating chamber 245 enters the fourth isolating chamber 263 and then enters the fourth isolating element 260, pushing the sealing element 262 downward. The spring 261 is compressed, and the hollow channel of the third isolating element 259 is opened, allowing the airflow to enter the vent chamber 2122 and then flow out from the vent port 215. When the airflow pressure decreases, the hollow channel continues to close under the action of the spring 261.

[0068] exist Figure 15In this state, when airflow enters from the lowest second vent 249 and pushes the lowest vent valve plug 244 upward, the gas in the second isolation chamber 247 needs to be discharged. Therefore, when the vent valve plug 244 moves upward to expose the second vent 249 in the lower middle position, airflow enters the first isolation chamber 245 from the second isolation chamber 247. The airflow in the first isolation chamber 245 enters the fourth isolation chamber 263 and then the fourth isolation member 260, pushing the sealing member 262 downward. The spring 261 is compressed, and the hollow channel of the third isolation member 259 is opened, allowing airflow to enter the exhaust chamber 2122 and then flow out from the exhaust port 215. When the airflow pressure decreases, the hollow channel continues to close under the action of the spring 261.

[0069] In this embodiment, the provision of the third isolation member 259 and the fourth isolation member 260 effectively solves the problem of the metering pump 2 failing when the ventilation valve stem 243 is in the middle.

[0070] When the venting valve stem 243 is in the middle position, in some embodiments of this invention, to allow gas to simultaneously enter each of the third isolation chambers 248, the sealing part 251 and the venting part 252 are connected by an inclined part 253. A first through hole 254 is provided at the connection between the sealing part 251 and the inclined part 253, and the first through hole 254 extends radially along the venting valve stem 243. Further, the first through hole 254 is connected to a second through hole 255, which extends axially along the venting valve stem 243. When the venting valve stem 243 is in the middle position, the first through hole 254 connects two adjacent third isolation chambers 248, allowing airflow to proceed smoothly. The second vent 255 further enhances airflow smoothness, enabling gas to flow smoothly into each of the third isolation chambers 248.

[0071] In some embodiments of this utility model, a silencer box is provided on the housing 21, and the air outlet 215 communicates with the interior of the silencer box 5. In this embodiment, the silencer box 5 can change the propagation path of sound waves, causing sound waves to be reflected or diffracted within the box, reducing straight-line propagation and achieving the effect of noise reduction. Furthermore, a gap is formed between the silencer box 5 and the outer shell for gas to escape.

[0072] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalent elements of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0073] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the 3342 technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A fluid distribution system, characterized in that: The system includes an oil storage device (1), a metering pump (2), a distribution valve group (3), and a control box (4). The inlet of the metering pump (2) is connected to the outlet of the oil storage device (1). The distribution valve group (3) includes an inlet pipe (31) and several valves (32). The inlets of the valves (32) are connected to the outlets of the inlet pipe (31). The outlet of the metering pump (2) is connected to the inlet of the inlet pipe (31). The valves (32) are equipped with a connecting device (33). The control box (4) is used to control the connecting device (33) to connect the inlet and outlet of the valves (32).

2. The fluid distribution system according to claim 1, characterized in that: The guiding device (33) includes an elastic member (331), a small pressure bead (332), a large pressure bead (333), and a striking pin (334). The large pressure bead (333) has a first flow channel (335). The diameter of the small pressure bead (332) is smaller than the diameter of the large pressure bead (333) but larger than the diameter of the first flow channel (335). The valve (32) has a second flow channel (336). The elastic member (331) is used to drive the small pressure bead (332) to block the first flow channel (335) and to drive the large pressure bead (333) to block the second flow channel (336). The striking pin (334) includes a top (3341), a middle part (3342), and a tail (334) arranged in sequence. 3) The top (3341) is housed within the first flow channel (335) and forms a first gap with the first flow channel (335). The middle part (3342) is housed within the second flow channel (336) and forms a second gap with the second flow channel (336). A gap is maintained between the middle part (3342) and the large pressure bead (333). The tail (3343) extends outside the valve (32). The tail (3343) is used to input power to drive the top (3341) to first push open the small pressure bead (332) to open the first flow channel (335), and then drive the middle part (3342) to push open the large pressure bead (333) to open the second flow channel (336).

3. The fluid distribution system according to claim 2, characterized in that: The control box (4) includes a box body (41), a pneumatic valve assembly (42) and a plurality of cylinders (43). The pneumatic valve assembly (42) is located inside the box body (41). The plurality of cylinders (43) are arranged in a one-to-one correspondence with the plurality of tail sections (3343). The pneumatic valve assembly (42) is used to drive the cylinders (43) to extend and retract to drive the tail sections (3343).

4. The fluid distribution system according to claim 1, characterized in that: The metering pump (2) includes a housing (21), a pump rod assembly (22), a piston assembly (23), and a vent valve assembly (24). The housing (21) includes a pump chamber (211), a connecting chamber (212), and a power chamber (213). The inlet of the pump rod assembly (22) is connected to the outlet of the oil storage device (1). The piston assembly (23) is movably disposed within the pump chamber (211) and connected to the pump rod assembly (22). The vent valve assembly (24) is movably disposed within the power chamber (213). The connecting chamber (212) is used to connect the pump chamber (211) and the oil storage device (1). The power chamber (213) is provided with an air inlet (214), and the connecting chamber (212) is provided with an air outlet (215). The air inlet (214) allows airflow to enter the power chamber (213) to drive the air exchange valve assembly (24) to reciprocate. The air exchange valve changes the airflow direction between itself and the connecting chamber (212) through reciprocating motion to drive the piston assembly (23) to reciprocate. The piston assembly (23) drives the pump rod assembly (22) to draw oil from the oil storage device (1) into the inlet pipe (31) through reciprocating motion.

5. The fluid distribution system according to claim 4, characterized in that: The ventilation valve assembly (24) includes a first seal (241), a second seal (242), a ventilation valve stem (243), and a ventilation valve plug (244). The first seal (241) is disposed within the power chamber (213) and forms several mutually isolated first isolation chambers (245) with the power chamber (213). The power chamber (213) has several first ventilation holes for connecting the connecting chamber (212) and the first isolation chambers (245). The second seal (242) is disposed within the first seal (241) and forms several mutually isolated second isolation chambers (247) with the first seal (241). The interior of the second seal (242) has several mutually isolated third isolation chambers (248). The first seal (241) has a second ventilation hole (249) for connecting the first isolation chamber (245) and the second isolation chamber (247). The second sealing element (242) has a third vent hole (250) for connecting the second isolation chamber (247) and the third isolation chamber (248). The vent valve stem (243) includes a sealing part (251) and a venting part (252). The sealing part (251) and the venting part (252) are provided in a plurality of alternating arrangements. The vent valve stem (243) passes through the second sealing element (242). The vent valve plug (250) is provided in a plurality of alternating arrangements. 44) The sealing part (251) is located on one end of the vent valve stem (243) extending outside the second seal (242). The diameter of the sealing part (251) is larger than the diameter of the vent (252). The vent valve plug (244) is used to drive the vent valve stem (243) to reciprocate so that the sealing part (251) connects the two adjacent third isolation chambers (248) and the vent (252) connects the two adjacent third isolation chambers (248).

6. The fluid distribution system according to claim 5, characterized in that: The sealing part (251) and the venting part (252) are connected by a beveled part (253). A first through hole (254) is provided at the connection between the sealing part (251) and the beveled part (253). The first through hole (254) extends in the radial direction of the venting valve stem (243).

7. The fluid distribution system according to claim 5, characterized in that: The pump chamber (211) is provided with a fourth ventilation hole (256), a fifth ventilation hole (257), and a first air outlet (258). The connecting cavity (212) includes an air outlet cavity (2122) and several ventilation cavities (2121). The air outlet (215) is provided on the air outlet cavity (2122). The ventilation cavity (2121) is provided with a guide element (2124), which divides the ventilation cavity (2121) into a first guide cavity (2125) and a second guide cavity (2126). The fourth ventilation hole (256) is used to connect the pump chamber (211) and the first guide cavity (2125). The fifth ventilation hole (257) is used to connect the pump chamber and the second guide cavity. The air chamber (2126) has a first air outlet (258) for connecting the air outlet chamber (2122) and the pump chamber (211). When the piston assembly (23) reciprocates between the first stroke dead point and the second stroke dead point in the pump chamber (211), the fourth air exchange hole (256) and the fifth air exchange hole (257) are isolated from each other and the first air outlet hole (258) and the fifth air exchange hole (257) are connected. When the piston assembly (23) moves to the first stroke dead point or the second stroke dead point in the pump chamber (211), the fourth air exchange hole (256) and the fifth air exchange hole (257) are connected to each other and the first air outlet hole (258) and the fifth air exchange hole (257) are connected to each other.

8. The fluid distribution system according to claim 7, characterized in that: The first ventilation port includes a first ventilation port one (2461), a first ventilation port two (2462), and a first ventilation port three (2463). The first ventilation port one (2461) is used to connect the first air guiding chamber (2125) and the first isolation chamber (245). The first ventilation port two (2462) is used to connect the second air guiding chamber (2126) and the first isolation chamber (245). The first ventilation port three (2463) is used to connect the air outlet chamber (2122) and the first isolation chamber (245).

9. The fluid distribution system according to claim 7, characterized in that: The air outlet chamber (2122) is provided with a third insulating member (259) and a fourth insulating member (260). The third insulating member (259) is provided with a hollow channel, which passes through the third insulating member (259) along its axial direction. The fourth insulating member (260) is provided with a spring (261) and a sealing member (262). The sealing member (262) is movably disposed in the fourth insulating member (260). The spring (261) is used to drive the sealing member (262) to seal one end of the hollow channel.

10. The fluid distribution system according to claim 5, characterized in that: The housing (21) is provided with a silencer box (5), and the air outlet (215) is connected to the interior of the silencer box (5).

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