Plunger pump

Abstract

The utility model discloses a plunger pump which comprises a driving mechanism and a liquid flowing mechanism, and the driving mechanism is connected with the liquid flowing mechanism. The driving mechanism comprises a connecting rod and a first elastic piece, and the connecting rod is sleeved with the first elastic piece; the liquid flowing mechanism comprises a water inlet assembly, a water outlet assembly and a compression pipe, the compression pipe is connected with the water inlet assembly and the water outlet assembly, and the connecting rod is correspondingly arranged on the compression pipe. When the connecting rod reciprocates, the connecting rod compresses the interior of the compression pipe, due to pressure changes, liquid is pumped from the water inlet pipe to the water outlet pipe, when the connecting rod stops compressing, the connecting rod moves in the direction away from the fluid mechanism, and elastic force generated by elastic deformation of the first elastic piece serves as driving force of the connecting rod to push the connecting rod to move; therefore, the energy consumption of the whole device is reduced, and meanwhile, the service life of the product is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of plunger pumps, and in particular to a plunger pump. Background Art

[0002] A plunger pump is a type of pump and a key component in hydraulic systems. It relies on the reciprocating motion of a plunger within a cylinder, causing the volume of a sealed working chamber to change, thereby absorbing and compressing oil. Plunger pumps offer advantages such as high rated pressure, compact structure, high efficiency, and easy flow regulation. They are widely used in applications requiring high pressure, high flow, and where flow regulation is required, such as hydraulic presses, construction machinery, and ships.

[0003] When working, the existing plunger pump achieves the suction and discharge of liquid by reciprocating motion inside the pump. This reciprocating motion will generate pressure pulsations at the pump outlet. These pressure pulsations will be directly transmitted to the entire pump system, causing greater impact and vibration to the system, resulting in adverse effects. Utility Model Content

[0004] The technical problem to be solved by this application is that when the existing plunger pump is working, it realizes the suction and discharge of liquid by performing reciprocating motion in the pump, and this reciprocating motion will generate pressure pulsations at the pump outlet. These pressure pulsations are directly transmitted to the entire pump system, causing the system to produce greater impact and vibration, resulting in adverse effects.

[0005] In order to solve the above problems, in order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a plunger pump.

[0006] The utility model discloses a plunger pump, which comprises a driving mechanism and a liquid flow mechanism, wherein the driving mechanism is connected to the liquid flow mechanism;

[0007] The driving mechanism includes a connecting rod and a first elastic member, wherein the first elastic member is sleeved on the connecting rod;

[0008] The liquid flow mechanism includes a water inlet assembly, a water outlet assembly and a compression tube. The compression tube is respectively connected to the water inlet assembly and the water outlet assembly. The connecting rod is correspondingly arranged on the compression tube.

[0009] Preferably, the driving mechanism includes a driving assembly, a gear transmission assembly and a cam transmission assembly, the driving assembly is connected to the gear transmission assembly, the gear transmission assembly is connected to the cam transmission assembly, and the cam transmission assembly is connected to the connecting rod.

[0010] Preferably, the cam transmission assembly includes a cam, a transmission gear, a movable shaft, and a cam driving block. The movable shaft is connected to the transmission gear, and the cam and the transmission gear are integrally formed.

[0011] Preferably, it comprises a shell, a slide bar is provided on the inner wall of the shell, and a slide groove is provided on the cam driving block, and the slide groove is connected to the slide bar.

[0012] Preferably, the cam driving block is provided with a moving slot, and the direction of the moving slot is perpendicular to the direction of the sliding slot;

[0013] The movable groove includes a groove bottom, a first limiting portion and a second limiting portion. The first limiting portion and the second limiting portion are arranged at opposite edges of the groove bottom. The first limiting portion is parallel to the second limiting portion. The distance between the first limiting portion and the second limiting portion is equal to the diameter of the cam.

[0014] Preferably, the gear transmission assembly includes a reduction driving wheel and a reduction driven wheel, the reduction driving wheel is meshed and connected with the reduction driven wheel, the reduction driven wheel is meshed and connected with the transmission gear, and the reduction driving wheel is connected to the output shaft of the drive assembly.

[0015] Preferably, the water inlet assembly includes a water inlet pipe, a water inlet elastic member and a water inlet seal, the water inlet elastic member is sleeved on the water inlet seal, and the water inlet elastic member and the water inlet seal are arranged in the water inlet pipe;

[0016] The water outlet assembly includes a water outlet pipe, a water outlet elastic member and a water outlet seal, wherein the water outlet elastic member is sleeved on the water outlet seal, and the water outlet elastic member and the water outlet seal are arranged in the water outlet pipe;

[0017] The water inlet pipe, the water outlet pipe and the compression pipe are integrally formed.

[0018] Preferably, a first compression chamber is provided in the compression tube, a second compression chamber is provided in the water inlet pipe, and a third compression chamber is provided in the water outlet pipe, and the first compression chamber and the second compression chamber are connected to the same end of the third compression chamber.

[0019] Preferably, the water entry seal is divided into a first water entry end and a second water entry end, and the outer diameter of the first water entry end is larger than the outer diameter of the second water entry end;

[0020] The water outlet seal is divided into a first water outlet end and a second water outlet end, and the outer diameter of the first water outlet end is larger than the outer diameter of the second water outlet end;

[0021] The first water inlet end is arranged close to the first compression chamber, and the second water outlet end is arranged close to the second compression chamber.

[0022] Preferably, the first compression chamber is connected to the second compression chamber and the third compression chamber;

[0023] A first communication port is provided at a position where the first compression chamber is connected to the second compression chamber, and a second communication port is provided at a position where the first compression chamber is connected to the third compression chamber;

[0024] The first communication port and the second communication port have the same inner diameter;

[0025] The inner diameter of the first communication port and the inner diameter of the second communication port are smaller than the outer diameter of the first end and larger than the outer diameter of the second end.

[0026] Preferably, the liquid flow mechanism includes a piston, the piston is connected to the connecting rod, and the piston is installed in the compression tube.

[0027] The above technical solution provided by this application has the following advantages compared with the existing technology:

[0028] The plunger pump provided in the present application compresses the liquid inside the compression tube through a connecting rod. The liquid enters from the water inlet pipe and is discharged from the water outlet pipe. A first elastic member is provided on the connecting rod. When the connecting rod performs reciprocating motion, the connecting rod compresses the compression tube. Due to pressure changes, the liquid is pumped from the water inlet pipe to the water outlet pipe. When the connecting rod stops the compression action, the connecting rod moves away from the fluid mechanism. The elastic force generated by the elastic deformation of the first elastic member itself serves as the driving force of the connecting rod, pushing the connecting rod to move, which can save the energy consumption required for the connecting rod to return to its original state, thereby reducing the energy consumption of the entire device and extending the service life of the product.

[0029] In addition, the elastic deformation of the first elastic member itself can absorb the pressure pulsation generated during the reciprocating motion, avoid large impact and vibration inside the device, improve the performance and service life of the plunger pump, reduce the impact and vibration caused by the pressure pulsation, and reduce the adverse effects caused by it.

[0030] A water inlet elastic part and a water inlet seal are provided in the water inlet assembly, and a water outlet elastic part and a water outlet seal are provided in the water outlet assembly. As the connecting rod pushes the piston to compress the compression tube, the pressure in the compression tube changes, and the water inlet seal will cause pressure pulsation on the water inlet pipe wall and the water outlet seal will cause pressure pulsation on the water outlet closure. The water inlet elastic part and the water outlet elastic part can absorb the pressure pulsation generated in the reciprocating motion, reduce the vibration of the water outlet pipe and the water inlet pipe, and improve the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 A schematic diagram of the structure of a plunger pump provided in this application Figure 1 ;

[0034] Figure 2 A schematic diagram of the structure of a plunger pump provided in this application Figure 2 ;

[0035] Figure 3 A schematic diagram of the explosion structure of a plunger pump provided in this application;

[0036] Figure 4 Schematic diagram of the connection structure of the liquid flow mechanism and drive mechanism of a plunger pump provided in this application Figure 1 ;

[0037] Figure 5 Schematic diagram of the connection structure of the liquid flow mechanism and drive mechanism of a plunger pump provided in this application Figure 2 ;

[0038] Figure 6 A schematic diagram of the connection structure between the cam and the transmission gear of a plunger pump provided in this application;

[0039] Figure 7 Schematic diagram of the connection structure of the cam transmission assembly, connecting rod and first elastic member of a plunger pump provided in this application Figure 1 ;

[0040] Figure 8 Schematic diagram of the connection structure of the cam transmission assembly, connecting rod and first elastic member of a plunger pump provided in this application Figure 2 ;

[0041] Figure 9 Schematic diagram of the connection structure of the cam transmission assembly, connecting rod and first elastic member of a plunger pump provided in this application Figure 3 ;

[0042] Figure 10 Schematic diagram of the connection structure of the cam transmission assembly, connecting rod and first elastic member of a plunger pump provided in this application Figure 4 ;

[0043] Figure 11 A schematic diagram of the structure of a cam drive block of a plunger pump provided in this application Figure 1 ;

[0044] Figure 12 A schematic diagram of the structure of a cam drive block of a plunger pump provided in this application Figure 2 ;

[0045] Figure 13 A schematic diagram of the connection structure of the water inlet pipe, water outlet pipe and compression pipe of a plunger pump provided in this application;

[0046] Figure 14 A schematic diagram of the cross-sectional structure of a three-way pipe of a plunger pump provided in this application Figure 1 ;

[0047] Figure 15 A schematic diagram of the cross-sectional structure of a three-way pipe of a plunger pump provided in this application Figure 2 .

[0048] Description of reference numerals:

[0049] 1. Plunger pump;

[0050] 11. Housing; 111. Upper housing; 1111. Slider; 112. Lower housing; 1121. Limiting portion;

[0051] 12. Driving mechanism;

[0052] 121. Drive assembly;

[0053] 122, gear transmission assembly; 1221, reduction driving wheel; 1222, reduction driven wheel;

[0054] 123, cam transmission assembly; 1231, cam; 1232, transmission gear; 1233, movable shaft; 1234, cam drive block; 1235, movable groove; 12351, groove bottom; 12352, first limiting portion; 12353, second limiting portion; 1236, slide groove; 1237, slide groove;

[0055] 124, connecting rod;

[0056] 125. First elastic member;

[0057] 13. Liquid flow mechanism;

[0058] 131. Piston;

[0059] 132. Water inlet assembly; 1321. Water inlet pipe; 1322. Second compression chamber; 1323. Water inlet elastic member; 1324. Water inlet sealing member; 1325. Water inlet insert; 1326. Water inlet limiting member; 1327. First water inlet end; 1328. Second water inlet end;

[0060] 133. Water outlet assembly; 1331. Water outlet pipe; 1332. Third compression chamber; 1333. Water outlet elastic member; 1334. Water outlet sealing member; 1335. Water outlet insert; 1336. Water outlet restriction member; 1337. First water outlet end; 1338. Second water outlet end;

[0061] 134, compression tube; 1341, first compression chamber; 1342, sleeve; 1343, first communication port; 1344, second communication port;

[0062] 135. Connect the pipes. DETAILED DESCRIPTION

[0063] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0064] See Figure 1-15 The present utility model discloses a plunger pump 1 that achieves liquid suction and discharge by changing the volume of a sealed working chamber. The plunger pump 1 includes a housing 11, a drive mechanism 12, and a liquid flow mechanism 13. The drive mechanism 12 is connected to the liquid flow mechanism 13 and is disposed within the housing 11. The drive mechanism 12 provides a driving force to drive the liquid within the liquid flow mechanism 13.

[0065] The driving mechanism 12 includes a driving component 121, a gear transmission component 122, a cam transmission component 123, a connecting rod 124 and a first elastic member 125. The first elastic member 125 is sleeved on the connecting rod 124. The driving component 121 is connected to the gear transmission component 122, the gear transmission component 122 is connected to the cam transmission component 123, and the cam transmission component 123 is connected to the connecting rod 124.

[0066] Specifically, the driving assembly 121 includes a high-speed and high-torque motor. The driving assembly 121 provides driving force for the gear transmission assembly 122. The gear transmission assembly 122 drives the cam transmission assembly 123 to operate, driving the connecting rod 124 to move. The other end of the connecting rod 124 is connected to the liquid flow mechanism 13, which can provide power for the liquid flow mechanism 13. A first elastic member 125 is sleeved on the connecting rod 124. When the connecting rod 124 moves in a direction close to the liquid flow mechanism 13, the connecting rod 124 continuously applies a force to the first elastic member 125, and the first elastic member 125 is compressed. When the first elastic member 125 is compressed, it can absorb impact force. When the connecting rod 124 moves in a direction away from the liquid flow mechanism 13, the first elastic member 125 can help push the connecting rod 124 when it returns to its original state, so that the connecting rod 124 returns to its original position, which can allow the driving assembly 121 to reduce power to drive the connecting rod 124 to operate, thereby reducing power consumption.

[0067] The liquid flow mechanism 13 includes a piston 131, a water inlet assembly 132, a water outlet assembly 133, and a compression tube 134. The compression tube 134 is respectively connected to the water inlet assembly 132 and the water outlet assembly 133, that is, one end of the compression tube 134 is respectively connected to one end of the water inlet assembly 132 and one end of the water outlet assembly 133. The connecting rod 124 is correspondingly arranged on the compression tube 134, the piston 131 is connected to the connecting rod 124, and the piston 131 is arranged in the compression tube 134. The connecting rod 124 can apply a force to the piston 131, and the connecting rod 124 can drive the piston 131 to move in the compression tube 134.

[0068] The water inlet assembly 132 includes a water inlet pipe 1321, a water inlet elastic member 1323 and a water inlet seal 1324. The water inlet elastic member 1323 is sleeved on the water inlet seal 1324, and the water inlet elastic member 1323 and the water inlet seal 1324 are arranged in the water inlet pipe 1321; the water outlet assembly 133 includes a water outlet pipe 1331, a water outlet elastic member 1333 and a water outlet seal 1334. The water outlet elastic member 1333 is sleeved on the water outlet seal 1334, and the water outlet elastic member 1333 and the water outlet seal 1334 are arranged in the water outlet pipe 1331. In particular, the water inlet pipe 1321, the water outlet pipe 1331 and the compression pipe 134 are integrally formed, that is, the water inlet pipe 1321, the water outlet pipe 1331 and the compression pipe 134 form a three-way pipe, the water inlet pipe 1321, the water outlet pipe 1331 and the compression pipe 134 are interconnected, and the water inlet seal 1324 and the water outlet seal 1334 have the same appearance.

[0069] When the connecting rod 124 drives the piston 131 to move and moves in the three-way pipe, it drives the water inlet seal 1324 and the water outlet seal 1334 to move. The water inlet elastic member 1323 and the water outlet elastic member 1333 respectively absorb the impact force generated by the connecting rod 124 and the piston 131 compressing the liquid in the compression tube 134. They absorb the impact force through deformation. When returning to their original state, they can help the operation of the seal and the connecting rod 124, supplement their movement power, and reduce power consumption.

[0070] It can be understood that compression tube 134 is provided with a piston 131. Connecting rod 124 pushes piston 131 to compress the liquid inside compression tube 134. The liquid enters through water inlet pipe 1321 and flows out through water outlet pipe 1331. Connecting rod 124 is provided with a first elastic member 125. Water inlet seal 1324 is provided with water inlet elastic member 1323, and water outlet seal 1334 is provided with water outlet elastic member 1333. When connecting rod 124 reciprocates, water inlet seal 1324 blocks water inlet pipe 1321, or water outlet seal 1334 blocks water outlet pipe 1331. Connecting rod 124 continuously moves within compression tube 134, accelerating the flow of liquid within the tee. The reciprocating motion of connecting rod 124 and piston 131 within compression tube 134 generates pressure pulsations within the tee. The pressure pulsations are directly transmitted to the tee, causing significant internal shock and vibration, which may cause the tee wall to rupture. In addition, the elastic deformation of the water inlet elastic member 1323 and the water outlet elastic member 1333 themselves can absorb the pressure pulsation generated by the reciprocating motion of the piston 131, reduce the impact on the pipe walls of the water inlet pipe 1321 and the water outlet pipe 1331, avoid large impact and vibration inside the device, improve the performance and service life of the plunger pump 1, reduce the impact and vibration caused by pressure pulsation, and reduce the adverse effects caused by it. In addition, when the water inlet elastic member 1323 and the water outlet elastic member 1333 return to their original state, they can reliably supplement the moving power of the connecting rod 124, the water inlet seal 1324, and the water outlet seal 1334, thereby reducing the power consumption of the device.

[0071] The cam transmission assembly 123 includes a cam 1231, a transmission gear 1232, a movable shaft 1233, and a cam driving block 1234. The movable shaft 1233 is connected to the transmission gear 1232. The cam 1231 and the transmission gear 1232 are integrally formed, and both ends of the movable shaft 1233 are fixed on the housing 11; the gear transmission assembly 122 includes a reduction driving wheel 1221 and a reduction driven wheel 1222. The reduction driving wheel 1221 is meshed and connected with the reduction driven wheel 1222, and the reduction driven wheel 1222 is meshed and connected with the transmission gear 1232. The reduction driving wheel 1221 is connected to the output shaft of the drive assembly 121.

[0072] Specifically, the driving assembly 121 drives the reduction driving wheel 1221 to rotate, the reduction driving wheel 1221 drives the reduction driven wheel 1222 to rotate, the cam 1231 rotates as the transmission gear 1232 rotates, the moving shaft 1233 is set at the center of the transmission gear 1232, the transmission gear 1232 rotates around the moving shaft 1233, the inner circumference of the cam 1231 is tangent to the moving shaft 1233, and the rotation of the cam 1231 can drive the movement of the cam driving block 1234.

[0073] The cam drive block 1234 is provided with a movable groove 1235 whose width matches the diameter of the cam 1231. The movable shaft 1233 is tangential to the inner wall of the cam 1231. The cam drive block 1234 is provided with a slide groove 1236, through which the movable shaft 1233 passes and is movable. When the cam 1231 rotates, the movable shaft 1233 moves along the slide groove 1236. The slide groove 1236 also limits the movable position of the movable shaft 1233.

[0074] Specifically, the movable groove 1235 includes a groove bottom 12351, a first limiting portion 12351, and a second limiting portion 12352. The first limiting portion 12351 and the second limiting portion 12352 are arranged at opposite edges of the groove bottom 12351. The first limiting portion 12351 and the second limiting portion 12352 are parallel to each other. The distance between the first limiting portion 12351 and the second limiting portion 12352 is equal to the diameter of the cam 1231. The cam 1231 moves within the range enclosed by the first limiting portion 12351, the second limiting portion 12352, and the groove bottom 12351. In other words, the cam 1231 rolls along the straight line direction of the first limiting portion 12351 or the second limiting portion 12352, and as the cam 1231 moves, it rolls within the movable groove 1235.

[0075] In particular, the two side edges of the movable groove 1235 adjacent to the first limiting portion 12351 and the second limiting portion 12352 are open. When the cam 1231 moves in the movable groove 1235, part of the cam 1231 may be exposed, that is, the length of the movable groove 1235 may be smaller than the length of the trajectory of the movement of the cam 1231, which may reduce the overall volume of the movable groove 1235 and reduce the space occupied by the movable groove 1235.

[0076] The housing 11 is divided into an upper housing 111 and a lower housing 112, which are fastened together. A slide bar 1111 is provided on the inner wall of the upper housing 111, and a sliding groove 1237 is provided on the cam drive block 1234, which is connected to the slide bar 1111. The motor of the drive assembly 121 is disposed outside the housing 11, and the output shaft of the motor passes through the housing 11 and is connected to the gear transmission assembly 122. The gear transmission assembly 122, cam transmission assembly 123, connecting rod 124, and tee are disposed inside the housing 11. The pipe openings of the water inlet pipe 1321 and the water outlet pipe 1331 pass through the housing 11 and are exposed outside the housing 11 to facilitate the entry and exit of liquids.

[0077] Specifically, see Figure 7-12 The sliding groove 1237 and the moving groove 1235 are respectively arranged on two opposite surfaces of the cam driving block 1234, and the direction of the slide bar 1111 is the same as the direction of the connecting rod 124. The sliding groove 1237 and the slide bar 1111 limit the cam driving block 1234 from moving in the direction of the connecting rod 124. In addition, the setting direction of the sliding groove 1236 is the same as the moving direction of the connecting rod 124, and the direction in which the moving shaft 1233 moves relative to the sliding groove 1236 is the same as the moving direction of the connecting rod 124. The cam 1231 is arranged in the moving groove 1235, and the cam 1231 rotates around the moving shaft 1233. 231 can only move along the direction of the movable groove 1235. The rotation of the cam 1231 can push the movable groove 1235, so that the cam driving block 1234 moves along the direction of the connecting rod 124, thereby achieving the purpose of the connecting rod 124 being driven by the cam driving block 1234. It can be understood that the rotation of the cam 1231 allows the cam driving block 1234 to drive the connecting rod 124 to reciprocate along the direction of the connecting rod 124, and the piston 131 can continuously compress the liquid in the compression tube 134, so that the water inlet seal 1324 and the water outlet seal 1334 move with the compression activity of the piston 131.

[0078] Figure 7-10 In the embodiment, transmission gear 1232 rotates clockwise, and cam 1231 also rotates clockwise along with transmission gear 1232. Moving shaft 1233 first moves upward and then downward. Cam drive block 1234 first pushes connecting rod 124 toward compression tube 134 and then pulls connecting rod 124 away from compression tube 134, causing connecting rod 124 to reciprocate. Similarly, when transmission gear 1232 rotates counterclockwise, cam 1231 rotates counterclockwise, and each mechanism also rotates, pushing connecting rod 124 to reciprocate, thereby driving piston 131 to move within compression tube 134.

[0079] Among them, the cam 1231 structure requires a large torque to overcome mechanical resistance and load changes. Using the motor of the drive assembly 121 to directly drive the cam 1231 and the connecting rod 124 to rotate will result in the drive assembly 121 being unable to provide sufficient torque. Using a high-power motor to meet the torque requirement will increase version and energy consumption. Therefore, a gear transmission assembly 122 is added between the drive assembly 121 and the cam 1231 structure. The gear transmission method has a high torque transmission efficiency and can amplify the small torque generated by the motor of the drive assembly 121 through the gears to meet the torque requirements of the cam 1231 mechanism. Through the transmission of the gear transmission assembly 122, part of the load is transferred from the motor of the drive assembly 121 to the gear transmission assembly 122, reducing the load on the motor of the drive assembly 121, extending the service life of the motor of the drive assembly 121, and reducing the risk of damage to the motor of the drive assembly 121 due to overload. In addition, the gear transmission component 122 can ensure the continuity and stability of movement, reduce the vibration and noise caused by the direct drive of the motor of the drive component 121, and at the same time, when the motor of the drive component 121 fails, the gear transmission component 122 can be driven manually or by other means to ensure the normal operation of the system.

[0080] In particular, the lower shell 112 is provided with a limiting portion 1121, and the limiting portion 1121 is close to the installation position of the compression tube 134. One end of the first elastic member 125 is connected to the limiting portion 1121, and the other end is connected to the cam driving block 1234. When the cam driving block 1234 moves along the connecting rod 124, the first elastic member 125 can be compressed, so that the first elastic member 125 is elastically deformed under the action force.

[0081] In addition, when the connecting rod 124 drives the piston 131 to push into the compression tube 134 to perform a compression movement, the driving assembly 121 drives the cam transmission assembly 123 to move, providing a driving force for the connecting rod 124, so that the connecting rod 124 has sufficient driving force to perform a compression movement. At the same time, the first elastic member 125 is compressed and elastically deformed. When the piston 131 reaches the final stage of the compression movement, the first elastic member 125 is in its original state. The force generated by the elastic deformation can react on the connecting rod 124 to push the connecting rod 124 to move. At the same time, the liquid in the compression tube 134 will also push the piston 131 to restore the internal pressure to the same level as the maximum pressure. The state of the same air pressure, that is, from the connecting rod 124 pushing the piston 131 to reach the final stage of the compression activity to the piston 131 moving to the initial position, during this stage, the piston 131 is pushed by the liquid inside the compression tube 134 and the first elastic member 125. At this time, the driving component 121 can reduce the output power or stop outputting the driving force, relying on the liquid inside the compression tube 134 and the push of the first elastic member 125 to enable the piston 131 to move, thereby reducing the energy consumption of the driving component 121 and the energy consumption required by the entire device, thereby achieving the purpose of energy saving. Furthermore, when the piston 131 stops the compression activity, the service life of the device can be extended. It can be understood that when the piston 131 moves in the compression tube 134 to the position of the opening of the compression tube 134, the driving component 121 can reduce the output power for driving, and provide elastic force through the first elastic member 125 to push the piston 131 and the connecting rod 124 to move, and the low-power operation of the driving component 121 can allow the gear transmission component 122 and the transmission gear 1232 to maintain a certain speed without actively providing driving force for the connecting rod 124. The driving component 121 is in low-power operation or low-speed operation, which can ensure that the connecting rod 124 is pushed at the next time. There is enough reaction time to drive during the movement, avoiding acceleration in a short time, and protecting the entire device; or, when the piston 131 moves in the compression tube 134 to the position of the opening of the compression tube 134, the driving component 121 temporarily stops working and stops outputting the driving force, and only relies on the elastic force provided by the first elastic member 125 as the driving force to push the piston 131 and the connecting rod 124, so that the driving component 121 stops outputting during the reciprocating motion of the connecting rod 124, thereby achieving a greater reduction in energy consumption and achieving the purpose of energy saving.

[0082] A first compression chamber 1341 is provided within the compression tube 134, a second compression chamber 1322 is provided within the water inlet tube 1321, and a third compression chamber 1332 is provided within the water outlet tube 1331. The first compression chamber 1341 and the second compression chamber 1322 are connected to the same end of the third compression chamber 1332, and the first, second, and third compression chambers 1341, 1322, and 1332 are interconnected. The piston 131 is mounted within the first compression chamber 1341, the water inlet elastic member 1323 and the water inlet seal 1324 are mounted within the second compression chamber 1322 of the water inlet tube 1321, and the water outlet elastic member 1333 and the water outlet seal 1334 are mounted within the third compression chamber 1332 of the water outlet tube 1331. The connecting rod 124 is provided in correspondence with the compression tube 134.

[0083] The first compression chamber 1341 connects the second compression chamber 1322 and the third compression chamber 1332. A first connecting port 1343 is set at the position where the first compression chamber 1341 and the second compression chamber 1322 are connected. A second connecting port 1344 is set at the position where the first compression chamber 1341 and the third compression chamber 1332 are connected. The first connecting port 1343 and the second connecting port 1344 have the same inner diameter.

[0084] The water entry seal 1324 includes a water entry insertion portion 1325 and a water entry restriction portion 1326. The water entry restriction portion 1326 and the water entry insertion portion 1325 are integrally formed. The outer diameter of the water entry insertion portion 1325 is smaller than the outer diameter of the water entry restriction portion 1326. The water entry seal 1324 is divided into a first water entry end 1327 and a second water entry end 1328. The outer diameter of the first water entry end 1327 is larger than the outer diameter of the second water entry end 1328. The inner diameter of the first connecting port 1343 is smaller than or equal to the outer diameter of the first water entry end 1327 and larger than the outer diameter of the second water entry end 1328. The first water entry end 1327 is arranged on the water entry restriction portion 1326, and the second water entry end 1328 is arranged on the water entry insertion portion 1325. The water outlet seal 1334 includes a water outlet insertion portion 1335 and a water outlet limiting portion 1336. The water outlet limiting portion 1336 and the water outlet insertion portion 1335 are integrally formed. The outer diameter of the water outlet insertion portion 1335 is smaller than the outer diameter of the water outlet limiting portion 1336. The water outlet seal 1334 is divided into a first water outlet end 1337 and a second water outlet end 1338. The outer diameter of the first water outlet end 1337 is larger than the outer diameter of the second water outlet end 1338. The inner diameter of the second connecting port 1344 is smaller than or equal to the outer diameter of the first water outlet end 1337 and larger than the outer diameter of the second water outlet end 1338. The first water outlet end 1337 is arranged on the water outlet limiting portion 1336, and the second water outlet end 1338 is arranged on the water outlet insertion portion 1335.

[0085] The water outlet second end 1338 is disposed in the water outlet insertion portion 1335, the water inlet first end 1327 is disposed near the first compression chamber 1341, and the water outlet second end 1338 is disposed near the second compression chamber 1322. Specifically, the water inlet insertion portion 1325 can be inserted into the first communication port 1343, and the water outlet insertion portion 1335 can be inserted into the second communication port 1344, while the water inlet restriction portion 1326 cannot be inserted into the first communication port 1343, and the water outlet restriction portion 1336 cannot be inserted into the second communication port 1344. As a result, the water inlet seal 1324 is inserted into the first communication port 1343, and the water outlet seal 1334 is inserted into the second communication port 1344.

[0086] The length of the water inlet elastic member 1323 is smaller than the length inside the second compression chamber 1322, and the length of the water outlet elastic member 1333 is smaller than the length inside the third compression chamber 1332. When the water inlet elastic member 1323 is in a stretched state, the water inlet restriction portion 1326 will not directly contact the first connecting port 1343. Similarly, when the water outlet elastic member 1333 is in a stretched state, the water outlet restriction portion 1336 will not directly contact the second connecting port 1344, thereby avoiding restricting the flow of liquid in the tee pipe.

[0087] As an embodiment, a sleeve 1342 is provided in the compression tube 134, and the outer diameter of the sleeve 1342 matches the inner diameter of the compression tube 134, and the outer diameter of the piston 131 matches the inner diameter of the sleeve 1342, so that the piston 131 moves along the sleeve 1342, reducing direct wear on the inner wall of the compression tube 134, increasing the airtightness between the piston 131 and the sleeve 1342, and between the sleeve 1342 and the compression tube 134, and preventing liquid from leaking out.

[0088] The liquid flow mechanism 13 includes a connecting pipe 135, which is arranged at the inlet of the water inlet pipe 1321 and the outlet of the water outlet pipe 1331, and the connecting pipe 135 is exposed outside the shell 11, so as to facilitate the connection between the connecting pipe 135 and the external pipe; a sealing ring is provided at the position where the connecting pipe 135 is connected to the water inlet pipe 1321 or the water outlet pipe 1331, and the sealing ring can increase the connection sealing between the connecting pipe 135 and the water inlet pipe 1321 and the water outlet pipe 1331 to prevent liquid from leaking from the connection.

[0089] The connecting pipe 135 is made of flexible material, and a protrusion structure is provided at the connecting port. When the connecting pipe 135 is connected to an external pipe, its connecting port can be supported on the inner pipe wall of the external pipe, reducing the gap between the connecting pipes.

[0090] In particular, the inner diameter of the connecting pipe 135 is smaller than the outer diameters of the second water inlet end 1328 and the second water outlet end 1338 , and the inner diameter of the connecting pipe 135 is smaller than the inner diameters of the first communication port 1343 and the second communication port 1344 .

[0091] The first water inlet end 1327 of the water inlet seal 1324 in the second compression chamber 1322 is close to the first compression chamber 1341 , and the second water outlet end 1338 of the water outlet seal 1334 in the third compression chamber 1332 is close to the first compression chamber 1341 .

[0092] Specifically, in the second compression chamber 1322, the limiting portion of the water inlet seal 1324 faces the first connecting port 1343, the water inlet insertion portion 1325 faces the connecting pipe 135, one end of the water inlet elastic member 1323 is close to the connecting pipe 135, and the other end is arranged on the water inlet limiting portion 1326; in the third compression chamber 1332, the water outlet limiting portion 1336 of the water outlet seal 1334 faces the connecting pipe 135, the water outlet insertion portion 1335 faces the second connecting port 1344, one end of the water outlet elastic member 1333 is close to the second connecting port 1344, and the other end is arranged on the water outlet limiting portion 1336.

[0093] Among them, Figure 14 As shown, the piston 131 is pulled out of the compression tube 134 by the connecting rod 124, and the liquid moves into the compression tube 134 along with the piston 131. As the liquid approaches the compression tube 134, the water outlet seal 1334 in the water outlet pipe 1331 and the water inlet seal 1324 in the water inlet pipe 1321 approach the first connecting port 1343, and the liquid enters the second compression chamber 1322 from the connecting pipe 135, and the liquid can continuously enter the second compression chamber 1322 and flow into the first compression chamber 1341. The water outlet seal 1334 of the water outlet pipe 1331 moves toward the second connecting port 1344 to block the second connecting port 1344. At this time, the seal blocks the second connecting port 1344 to prevent the liquid in the connecting pipe 135 from being drawn into the third compression chamber 1332 and the first compression chamber 1341. As shown in the figure, the piston 131 is pushed into the compression tube 134 by the connecting rod 124 to compress the liquid in the compression tube 134. The liquid pushes the water outlet seal 1334 and the water inlet seal 1324 to move. The water outlet seal 1334 and the water inlet seal 1324 are close to the connecting pipe 135 to block the entrance of the connecting pipe. The water inlet seal 1324 is away from the first connecting port 1343. The water inlet insertion part 1325 is inserted into the connecting pipe 135. The water outlet seal 1334 is close to the connecting pipe 135. The water outlet limiting part 1336 is close to the connecting pipe 135. The liquid flows from the first compression chamber 1341 to the third compression chamber 1332. At this time, the seal blocks the entrance of the connecting pipe 135 to prevent the liquid from flowing back from the second compression chamber 1322 to the connecting pipe 135.

[0094] As an embodiment, the water inlet elastic member 1323 and the water outlet elastic member 1333 are configured in a tower shape. The water inlet elastic member 1323 is sleeved on the water inlet insertion portion 1325. One end of the water inlet elastic member 1323 is connected to the water inlet restriction portion 1326, and the other end is connected to the pipe wall of the water inlet pipe 1321. The water outlet elastic member 1333 is sleeved on the water outlet insertion portion 1335. One end of the water outlet elastic member 1333 is connected to the water inlet restriction portion 1326, and the other end is connected to the water outlet pipe 1331. The piston 131 pushes the liquid in the compression tube 134, and the water inlet seal 1324 and the water outlet elastic member 1333 are subjected to the force, compressing the water inlet elastic member 1323 and the water outlet elastic member 1333. The water inlet seal 1324 and the water outlet elastic member 1333 cannot directly apply impact force to the water outlet pipe 1331 or the port of the water inlet pipe 1321. The water inlet elastic member 1323 and the water outlet elastic member 1333 can reduce the impact force and vibration of the seal on the tee pipe.

[0095] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0096] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0098] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0099] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0100] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0101] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, as long as these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0102] The above description is a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A plunger pump, characterized in that: It comprises a driving mechanism and a liquid flow mechanism, wherein the driving mechanism is connected to the liquid flow mechanism; The driving mechanism comprises a connecting rod and a first elastic member, wherein the first elastic member is sleeved on the connecting rod; The liquid flow mechanism includes a water inlet assembly, a water outlet assembly and a compression tube. The compression tube is respectively connected to the water inlet assembly and the water outlet assembly. The connecting rod is correspondingly arranged on the compression tube.

2. The plunger pump according to claim 1, characterized in that: The driving mechanism comprises a driving assembly, a gear transmission assembly and a cam transmission assembly. The driving assembly is connected to the gear transmission assembly, the gear transmission assembly is connected to the cam transmission assembly, and the cam transmission assembly is connected to the connecting rod.

3. The plunger pump according to claim 2, characterized in that: The cam transmission assembly comprises a cam, a transmission gear, a moving shaft, and a cam driving block. The moving shaft is connected to the transmission gear, and the cam and the transmission gear are integrally formed.

4. The plunger pump according to claim 3, characterized in that: It comprises a shell, a slide bar is arranged on the inner wall of the shell, a slide groove is arranged on the cam driving block, and the slide groove is connected with the slide bar.

5. The plunger pump according to claim 3, characterized in that: The cam driving block is provided with a moving groove, and the direction of the moving groove is perpendicular to the direction of the sliding groove; The movable groove includes a groove bottom, a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are arranged at opposite edges of the groove bottom, the first limiting portion is parallel to the second limiting portion, and the distance between the first limiting portion and the second limiting portion is equal to the diameter of the cam.

6. The plunger pump according to claim 3, characterized in that: The gear transmission assembly includes a reduction driving wheel and a reduction driven wheel. The reduction driving wheel is meshed and connected with the reduction driven wheel. The reduction driven wheel is meshed and connected with the transmission gear. The reduction driving wheel is connected to the output shaft of the driving assembly.

7. The plunger pump according to claim 1, characterized in that: The water inlet assembly comprises a water inlet pipe, a water inlet elastic member and a water inlet sealing member, wherein the water inlet elastic member is sleeved on the water inlet sealing member, and the water inlet elastic member and the water inlet sealing member are arranged in the water inlet pipe; The water outlet assembly comprises a water outlet pipe, a water outlet elastic member and a water outlet seal, wherein the water outlet elastic member is sleeved on the water outlet seal, and the water outlet elastic member and the water outlet seal are arranged in the water outlet pipe; The water inlet pipe, the water outlet pipe and the compression pipe are integrally formed.

8. The plunger pump according to claim 7, characterized in that: A first compression chamber is arranged in the compression tube, a second compression chamber is arranged in the water inlet pipe, and a third compression chamber is arranged in the water outlet pipe. The first compression chamber and the second compression chamber are connected to the same end of the third compression chamber.

9. The plunger pump according to claim 8, characterized in that The water entry seal is divided into a first water entry end and a second water entry end, and the outer diameter of the first water entry end is greater than the outer diameter of the second water entry end; The water outlet seal is divided into a first water outlet end and a second water outlet end, and the outer diameter of the first water outlet end is greater than the outer diameter of the second water outlet end; The first water inlet end is arranged close to the first compression chamber, and the second water outlet end is arranged close to the second compression chamber.

10. The plunger pump according to claim 9, characterized in that The first compression chamber is connected to the second compression chamber and the third compression chamber; A first communication port is provided at a position where the first compression chamber is connected to the second compression chamber, and a second communication port is provided at a position where the first compression chamber is connected to the third compression chamber; The first communication port and the second communication port have the same inner diameter; The inner diameter of the first communication port and the inner diameter of the second communication port are smaller than the outer diameter of the first end and larger than the outer diameter of the second end.

11. The plunger pump according to claim 1, characterized in that The liquid flow mechanism comprises a piston, the piston is connected to the connecting rod, and the piston is installed in the compression tube.

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