Volumetric pump having overpressure protection function

Abstract

A volumetric pump having an overpressure protection function, the volumetric pump comprising an operating motor (1), a protective housing (2) disposed over the operating motor (1), and a transmission pump housing (3) disposed over the protective housing (2), the transmission pump housing (3) being connected to the protective housing (2). An output pipe (4) is disposed at a side of the transmission pump housing (3) distant from the protective housing (2), the output pipe (4) being connected to the transmission pump housing (3). The protective housing (2) is sleeved on an output end of the operating motor (1). An oil-passing hole is formed on the protective housing (2), and an oil outlet hole is formed on the transmission pump housing (3). A transmission worm screw (5) is disposed on the output end of the operating motor (1), and a transmission connecting rod (6) is disposed in the transmission pump housing (3), the transmission connecting rod (6) being slidably connected to the transmission pump housing (3). A reciprocating gear (7) is rotatably connected to the transmission connecting rod (6), the reciprocating gear (7) being rotatably connected to the transmission connecting rod (6), and teeth on the reciprocating gear (7) engaging with teeth on the transmission worm screw (5). An eccentric shaft (8) is provided on the reciprocating gear (7), and a linkage rod (9) is rotatably connected to the eccentric shaft (8), a pressure regulating piston (10) being provided at an end of the linkage rod (9) distant from the eccentric shaft (8). The pressure regulating piston (10) is connected to the output pipe (4), a conveying pipe (11) is provided on the output pipe (4), and the conveying pipe (11) is connected to the output pipe (4). The present volumetric pump has the functions of overpressure protection, and automatic regulation and control of pump output.

Description

A positive displacement pump with overpressure protection function Technical Field

[0001] The present invention relates to the technical field of positive displacement pumps, in particular to a positive displacement pump with an overpressure protection function. Background Art

[0002] A positive displacement pump is a pump that can transport fluid in a quantitative manner. A positive displacement pump is also called a positive displacement pump. It uses the periodic change of the volume of the working chamber in the pump to transport liquid. The discharge process is intermittent. Since the positive displacement pump uses the periodic change of the working chamber volume to achieve the purpose of transportation, the mechanical energy of the power machine is directly converted into the pressure of the transported liquid through the pump. The pump flow rate depends only on the change value of the working chamber volume of the pump body and the frequency of the change in the working chamber volume, and has nothing to do with the pipeline characteristics. The pressure it generates depends only on the pipeline characteristics. Positive displacement pumps can be divided into reciprocating pumps and rotary pumps. Reciprocating pumps rely on reciprocating pistons or plungers to push liquids. Rotary pumps, also known as rotor pumps, rely on rotating parts to push liquids.

[0003] The reciprocating pump is our most common pump body. Its simple structure and stable performance have always been praised by people. The piston pump is one of the most frequently used positive displacement pumps on the market because of its relatively low maintenance cost. However, this positive displacement pump also has some problems. Due to the characteristics of its piston, the piston pump cannot adjust the negative pressure in time during use, nor can it generate a response plan in time. As a result, the piston pump will bring a large load to the motor in the pump during use, and eventually the piston pump may have problems such as damage to the piston components.

[0004] Summary of the Invention

[0005] The object of the present invention is to provide a positive displacement pump with an overpressure protection function to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solution: a positive displacement pump with an overpressure protection function.

[0007] The positive displacement pump includes a running motor, a protective shell is provided on the running motor, a transmission pump shell is provided on the protective shell, the transmission pump shell is connected to the protective shell, an output pipe is provided on the side of the transmission pump shell away from the protective shell, the output pipe is connected to the transmission pump shell, the protective shell is sleeved on the output end of the running motor, an oil hole is provided on the protective shell, an oil outlet hole is provided on the transmission pump shell, a transmission worm is provided on the output end of the running motor, a transmission connecting rod is provided in the transmission pump shell, the transmission connecting rod is slidingly connected to the transmission pump shell, a reciprocating gear is rotatably connected to the transmission connecting rod, the reciprocating gear is rotatably connected to the transmission connecting rod, the teeth on the reciprocating gear are meshed with the teeth on the transmission worm, an eccentric shaft is provided on the reciprocating gear, a connecting rod is rotatably connected to the eccentric shaft, a pressure regulating piston is provided on the connecting rod away from the eccentric shaft, the pressure regulating piston is connected to the output pipe, a delivery pipe is provided on the output pipe, and the delivery pipe is connected to the output pipe. When working, the operating motor rotates, driving the transmission worm to rotate, and the transmission worm rotates in the transmission pump housing. The thread on the transmission worm drives the reciprocating gear to rotate, and the transmission connecting rod will support the reciprocating gear to rotate. The rotation of the reciprocating gear will drive the connecting rod on the eccentric shaft to move, and under the action of the connecting rod, it will drive the pressure regulating piston to move in the output pipe, thereby generating negative pressure in the output pipe, thereby changing the pressure difference of the liquid flow in the delivery pipe, and the components in the transmission pump housing will automatically adjust the size of the negative pressure to adapt to the liquid transmission under different pressures in the delivery pipe. In order to ensure the continuous engagement of the transmission worm and the reciprocating gear and normal operation, it is necessary to timely introduce sufficient lubricating oil into the transmission pump housing and the transmission pump housing, entering through the oil hole and discharged from the oil outlet.

[0008] A cooling pipe is provided on the inner wall of the protective shell, and the cooling pipe passes through the inner wall of the protective shell and is embedded in the transmission pump shell. A support bearing is provided in the protective shell, and a support spring is provided on the support bearing. The two ends of the support spring are respectively against the protective shell and the outer circle of the support bearing. The output end of the running motor passes through the inner circle of the support bearing, and an oil filter is provided in the protective shell. A follower fan wheel is provided on the oil filter net, and the follower fan wheel is rotatably connected to the oil filter net. A plurality of oil throwing boxes are provided on the follower fan wheel. During operation, the cooling pipe will cool down the protective shell and the inside of the transmission pump shell, so that the equipment can operate stably. A cooling medium flows through the cooling pipe to achieve a cooling effect. When the running motor rotates, it will drive the lubricating oil to flow, and this flow will drive the follower fan wheel to rotate. The oil throwing box on the follower fan wheel will drive the lubricating oil to move, and allow the lubricating oil to hit the oil filter net. The filtered lubricating oil will enter the transmission pump shell, and the support bearing has the effect of smooth rotation.

[0009] A cooling hole is provided in the transmission pump housing, and the cooling pipe is embedded in the cooling hole. An adjustment hole is provided on the transmission pump housing, and an adjusting bolt is provided on the transmission connecting rod. The thread on the adjusting bolt engages with the thread on the adjusting hole, and the adjusting bolt is rotatably connected to the transmission connecting rod. A booster frame is provided in the transmission pump housing, and a booster ring is provided on the connecting rod. The booster ring and the booster frame are connected by sliding. The cooling pipe will provide a support position for the cooling pipe. By adjusting the adjusting bolt, the position of the adjusting bolt on the transmission pump housing will change, and the transmission connecting rod will move synchronously with the adjusting bolt, thereby changing the progress of the adjusting piston, thereby changing the amount of liquid pumped into the delivery pipe, and in the process of adjustment, the booster frame will assist in boosting the connecting rod, thereby adapting to pumping operations under various pressures.

[0010] The first boost rod and the second boost rod are respectively connected to the boost rod for sliding movement, and the first boost rod and the second boost rod are respectively connected to the boost rod for rotation near one end of the boost ring. A boost turntable is provided in the transmission pump housing, and the boost turntable is connected to the transmission pump housing for rotation. The boost turntable is provided with teeth, and the teeth on the boost turntable are meshed with the teeth on the transmission worm. Boost wedges are respectively provided at the two ends of the boost turntable close to each other, and the first boost rod and the second boost rod are in sliding contact with each other. A lubricating ball is provided on the inner wall of the boost ring, and the lubricating ball is connected to the boost ring for rotation. During the boosting process, the boost turntable will rotate driven by the running motor, and the boost wedge on the boost turntable will squeeze the first boost rod and the second boost rod. The first boost rod and the second boost rod have a contraction function, so as to adapt to the position of the boost frame, and thus adapt to the swinging movement of the reciprocating gear, so that the first boost rod and the second boost rod assist in boosting the connecting rod. At the same time, the frequency of the boost assistance is consistent with the swing frequency of the connecting rod, and the boost ring will move on the connecting rod, and the lubricating ball will rotate inside the boost ring, so as to reduce the energy loss of the boost ring when it moves on the connecting rod.

[0011] The pressure regulating piston includes a pressure regulating spring, an extrusion piston, and a rotating seat. The rotating seat is rotatably connected to the connecting rod. The pressure regulating spring is arranged on the connecting seat. The end of the pressure regulating spring away from the rotating seat is connected to the extrusion piston. The extrusion piston is in sliding contact with the output pipe. A diffusion chamber is provided in the output pipe. A diffusion ring is provided in the diffusion chamber. The diffusion ring includes a plurality of curved columns. Adjacent curved columns are connected by a return spring. The curved columns are in sliding contact with the diffusion chamber. A moving guide rod is provided on one of the curved columns. The moving guide rod is connected to the boosting turntable at one end away from the curved column. Under the action of the reciprocating gear, the pressure regulating piston will The extrusion piston moves in the output pipe, thereby generating negative pressure in the output pipe, so that the flow medium in the delivery pipe can flow in the delivery pipe. At the same time, the curved column on the diffusion chamber will feel the deformation of the pressure-regulating spring. When the deformation of the pressure-regulating spring is too large, it will squeeze the curved column, causing the curved column to expand. The expanded curved column will drive the moving guide rod to move, and the moving guide rod will drive the boost turntable to move, so that the boost turntable and the transmission worm are engaged, thereby completing the operation of triggering the boost.

[0012] A moving slider is provided in the transmission pump housing, the boost turntable is provided on the moving slider and is rotationally connected to the moving slider, the moving slider is slidingly connected to the transmission pump housing, the moving slider is rotationally connected to the end of the moving guide rod away from the curved column, the moving guide rod is rotationally connected to the transmission pump housing, the moving guide rod is a multi-section structure, and the moving guide rod is rotationally connected to the output pipe. When the moving guide rod receives feedback from the curved column, it will drive the boost slider to move, indirectly driving the boost turntable, so that the boost turntable contacts the transmission turbine.

[0013] A one-way water inlet valve and a one-way water outlet valve are provided in the delivery pipe, and the one-way water inlet valve and the one-way water outlet valve are respectively provided at the water inlet end and the water outlet end of the delivery pipe. A surge cavity is provided in the delivery pipe, and the surge cavity is connected with the output pipe. A plurality of surge holes are provided on the surge cavity. A surge diaphragm is provided on the side of the output pipe close to the surge cavity. The surge diaphragm is sealed and connected to the output pipe. During the delivery process, during the surging process, the structure of the surge diaphragm can be added to generate negative pressure, thereby reducing the flow medium from directly entering the output pipe and reducing corrosion damage to the output pipe. At the same time, under the action of the surge diaphragm, the flow of the flow medium can be made smoother, and the use of the surge diaphragm is also more convenient for adjustment.

[0014] An adjustment ring is provided on the output pipe, a surge diaphragm is provided on the adjustment ring, a transmission ring is provided on the adjustment ring, a tooth groove is provided in the transmission ring, a plurality of transmission springs are provided on the tooth groove, each transmission spring is respectively connected with the tooth groove in a sliding manner, a telescopic ring is provided at one end of each transmission spring away from the tooth groove, the telescopic ring is connected with the adjustment ring through a telescopic bracket, teeth are provided on the outer circle of the adjustment ring, a transmission rack is rotatably connected in the adjustment ring, the transmission rack is rotatably connected to the moving guide rod, the transmission rack is meshed with the teeth on the transmission ring, the transmission rack is slidably connected to the output pipe, when the curve When the shaped column moves with the movable guide rod, the movable guide rod will also drive the transmission rack to move, and the transmission rack will rotate with the transmission ring. After the transmission ring rotates, it will drive the telescopic ring to expand or contract, thereby controlling the effective area of ​​the surging diaphragm. The internal transmission spring can play a supporting role. When the effective area of ​​the surging diaphragm increases, the pumping volume and pumping volume can be fully increased, the pressure in the pump body can be adjusted, and the connecting rod can be used to effectively increase the storage volume of the surging diaphragm, thereby improving the working efficiency of the surging diaphragm.

[0015] Auxiliary balls are provided on the threads of the transmission worm, and each auxiliary ball is rotationally connected to the threads on the transmission worm. The teeth on the reciprocating gear are in sliding contact with the auxiliary balls. A stabilizing frame is provided in the transmission pump housing, and the reciprocating gear is slidably connected to the stabilizing frame. In order to make the transmission worm drive the reciprocating gear to run smoothly, the auxiliary balls are against the threads of the transmission worm, and the transmission worm will rotate with the reciprocating gear, reducing the direct contact between the threads on the reciprocating gear and the threads on the transmission worm, reducing damage to parts, and the stabilizing frame will stabilize the reciprocating gear so that the reciprocating gear can rotate smoothly.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention adopts an automatic pressure-regulating component, which can automatically assist and boost the piston according to the pressure changes in the output pipe, thereby making the piston smoother in the movement process, reducing the pressure on the reciprocating gears, and reducing damage to product parts, thereby adapting to the supply of fluids with various pressure changes.

[0017] 2. The present invention adopts an adaptive supply component, which fully adapts to the supply of fluids with various supply volumes by changing the effective working area and range of the surge diaphragm. At the same time, the use of this component can also fully reduce the damage to the output pipe and motor caused by overload pressure, fully maintain the stability of the product, extend the stability of the equipment, and make the product more widely used.

[0018] 3. The present invention adopts an automatic oil filter component, which can ensure the lubricating performance and lubricating state of the lubricating oil during the operation of the product, so that the equipment can avoid the problem of severe heating of the equipment due to the reduction of the lubricating performance of the lubricating oil during operation, and extend the service life of internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] FIG1 is a schematic diagram of a three-dimensional structure of the present invention;

[0021] FIG2 is a front view of the structure of the present invention;

[0022] FIG3 is a schematic diagram of the pump structure of the present invention;

[0023] FIG4 is a schematic diagram of a partially enlarged structure A in FIG3 ;

[0024] FIG5 is a schematic diagram of a partially enlarged structure B in FIG3 ;

[0025] FIG6 is a schematic diagram of the internal structure of the diffusion chamber of the present invention;

[0026] 7 is a schematic structural diagram of the cooperation relationship between the telescopic ring and the transmission ring of the present invention;

[0027] FIG8 is a schematic diagram of the internal structure of the transmission pump housing of the present invention;

[0028] FIG9 is a schematic diagram of the internal structure of the boost ring of the present invention;

[0029] In the figure: 1. Operating motor; 2. Protective housing; 201. Support bearing; 202. Support spring; 203. Oil filter; 204. Rotating fan wheel; 205. Oil ejector; 3. Transmission pump housing; 301. Moving slider; 302. Stabilizing frame; 4. Output pipe; 401. Diffusion chamber; 402. Diffusion ring; 403. Curved column; 404. Moving guide rod; 405. Surge diaphragm; 406. Adjustment ring; 407. Transmission ring; 408. Transmission spring; 409. Telescopic ring; 410. Telescopic bracket; 412. Transmission Rack; 5. Drive worm; 501. Auxiliary ball; 6. Drive connecting rod; 601. Adjusting bolt; 602. Boosting ring; 603. Lubricating ball; 7. Reciprocating gear; 8. Eccentric shaft; 9. Connecting rod; 10. Pressure-regulating piston; 11. Delivery pipe; 1101. Surge chamber; 12. Cooling pipe; 13. Boosting rack; 1301. First boosting rod; 1302. Second boosting rod; 1303. Boosting turntable; 1001. Pressure-regulating spring; 1002. Extrusion piston; 14. One-way water inlet valve; 15. One-way water outlet valve. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] As shown in Figures 1 and 3, the positive displacement pump includes a running motor 1, a protective shell 2 is provided on the running motor 1, a transmission pump shell 3 is provided on the protective shell 2, the transmission pump shell 3 is communicated with the protective shell 2, and the transmission pump shell 3 is provided with an output pipe 4 away from the protective shell 2. The output pipe 4 is communicated with the transmission pump shell 3, the protective shell 2 is sleeved on the output end of the running motor 1, the protective shell 2 is provided with an oil hole, the transmission pump shell 3 is provided with an oil outlet hole, a transmission worm 5 is provided on the output end of the running motor 1, a transmission connecting rod 6 is provided in the transmission pump shell 3, the transmission connecting rod 6 is slidingly connected to the transmission pump shell 3, a reciprocating gear 7 is rotatably connected to the transmission connecting rod 6, the reciprocating gear 7 is rotatably connected to the transmission connecting rod 6, the teeth on the reciprocating gear 7 are meshed with the teeth on the transmission worm 5, an eccentric shaft 8 is provided on the reciprocating gear 7, a connecting rod 9 is rotatably connected to the eccentric shaft 8, a pressure regulating piston 10 is provided on the connecting rod 9 away from the eccentric shaft 8. The pressure regulating piston 10 is connected to the output pipe 4, and the output pipe 4 is provided with a pressure regulating piston 10. A delivery pipe 11 is provided, which is connected to the output pipe 4. When working, the operating motor 1 rotates, driving the transmission worm 5 to rotate, and the transmission worm 5 rotates in the transmission pump housing 3. The thread on the transmission worm 5 drives the reciprocating gear 7 to rotate, and the transmission connecting rod 6 will support the reciprocating gear 7 to rotate. The rotation of the reciprocating gear 7 will drive the connecting rod 9 on the eccentric shaft 8 to move, and under the action of the connecting rod 9, the pressure-regulating piston 10 will be driven to move in the output pipe 4, thereby generating negative pressure in the output pipe 4, thereby changing the pressure difference of the liquid flow in the delivery pipe 11, and the components in the transmission pump housing will automatically adjust the size of the negative pressure to adapt to the liquid transmission under different pressures in the delivery pipe 11. In order to ensure the continuous engagement and normal operation of the transmission worm 5 and the reciprocating gear 7, it is necessary to timely introduce sufficient lubricating oil into the transmission pump housing 3 and the transmission pump housing 3, entering through the oil hole and discharged from the oil outlet.

[0032] As shown in Figures 3 and 4, a cooling pipe 12 is provided on the inner wall of the protective shell 2. The cooling pipe 12 passes through the inner wall of the protective shell 2 and is embedded in the transmission pump shell 3. A support bearing 201 is provided in the protective shell 2. A support spring 202 is sleeved on the support bearing 201. The two ends of the support spring 202 are respectively against the outer circle of the protective shell 2 and the support bearing 201. The output end of the running motor 1 passes through the inner circle of the support bearing 201. An oil filter 203 is provided in the protective shell 2. A rotating fan wheel 204 is provided on the oil filter 203. The rotating fan wheel 204 is rotatably connected to the oil filter 203. A plurality of oil throwing boxes 20 are provided on the rotating fan wheel 204. 5. During operation, the cooling pipe 12 will cool down the inside of the protective shell 2 and the transmission pump shell 3, so that the equipment can operate stably. A cooling medium flows through the cooling pipe 12 to achieve a cooling effect. When the operating motor 1 rotates, it will drive the lubricating oil to flow, and this flow will drive the rotating fan wheel 204 to rotate. The oil throwing box 205 on the rotating fan wheel 204 will drive the lubricating oil to move and allow the lubricating oil to hit the oil filter 203. The filtered lubricating oil will enter the transmission pump shell 3, and the support bearing 201 will have the effect of smooth rotation.

[0033] As shown in Figure 3, a cooling hole is provided in the transmission pump housing 3, and the cooling pipe 12 is embedded in the cooling hole. An adjustment hole is provided on the transmission pump housing 3, and an adjusting bolt 601 is provided on the transmission connecting rod 6. The thread on the adjusting bolt 601 engages with the thread on the adjusting hole. The adjusting bolt 601 is rotatably connected to the transmission connecting rod 6. A booster frame 13 is provided in the transmission pump housing 3, and a boost ring 602 is sleeved on the connecting rod 9. The boost ring 602 is connected to the booster frame 13 by sliding. The cooling pipe will provide a support position for the cooling pipe 12. By adjusting the adjusting bolt 601, the position of the adjusting bolt 601 on the transmission pump housing 3 will change, and the transmission connecting rod 6 will move synchronously with the adjusting bolt 601, thereby changing the progress of the adjusting piston, thereby changing the amount of liquid pumped into the delivery pipe 11, and in the process of adjustment, the booster frame 13 will assist in boosting the connecting rod 9, thereby adapting to pumping operations under various pressures.

[0034] As shown in Figures 3, 8 and 9, a first boost rod 1301 and a second boost rod 1302 are provided in the boost frame 13, and the first boost rod 1301 and the second boost rod 1302 are respectively slidably connected to the boost frame 13, and the first boost rod 1301 and the second boost rod 1302 are respectively rotatably connected to the boost ring 602 at one end close to the boost ring 602, and a boost turntable 1303 is provided in the transmission pump housing 3, and the boost turntable 1303 is rotatably connected to the transmission pump housing 3, and teeth are provided on the boost turntable 1303, and the teeth on the boost turntable 1303 are meshed with the teeth on the transmission worm 5, and boost wedges are respectively provided at the two ends close to each other of the boost turntable 1303, and the first boost rod 1301 and the second boost rod 1302 have boost wedges in sliding contact, and lubricating balls 603 are provided on the inner wall of the boost ring 602. 603 is rotationally connected to the boost ring 602. During the boosting process, the boost turntable 1303 will rotate under the power of the running motor 1, and the boost wedge on the boost turntable 1303 will squeeze the first boost rod 1301 and the second boost rod 1302. The first boost rod 1301 and the second boost rod 1302 have a contraction function, so as to adapt to the position of the boost frame 13, and thus also adapt to the swinging movement of the reciprocating gear 7, so that the first boost rod 1301 and the second boost rod 1302 assist the connecting rod to boost, and at the same time, the frequency of the boost assistance is consistent with the swinging frequency of the connecting rod 9, and the boost ring 602 will move on the connecting rod 9, and the lubricating ball 603 will rotate inside the boost ring 602, thereby reducing the energy loss of the boost ring 602 when moving on the connecting rod 9.

[0035] As shown in Figure 3, the pressure-regulating piston 10 includes a pressure-regulating spring 1001, an extruding piston 1002, and a rotating seat 1003. The rotating seat 1003 is rotatably connected to the connecting rod 9. The pressure-regulating spring 1001 is arranged on the connecting seat. The end of the pressure-regulating spring 1001 away from the rotating seat 1003 is connected to the extruding piston 1002. The extruding piston 1002 is in sliding contact with the output pipe 4. A diffusion chamber 401 is provided in the output pipe 4. A diffusion ring 402 is provided in the diffusion chamber 401. The diffusion ring 402 includes a plurality of curved columns 403. Adjacent curved columns 403 are connected by a return spring. The curved columns 403 are in sliding contact with the diffusion chamber 401. A moving guide rod 404 is provided on one of the curved columns 403. The moving guide rod 404 is connected to the booster turntable 1303 at one end away from the curved column 403. Then, under the action of the reciprocating gear 7, the pressure-regulating piston 10 will move in the output pipe 4, and the extrusion piston 1002 will move in the output pipe 4, thereby generating negative pressure in the output pipe 4, so that the flowing medium in the delivery pipe 11 can flow in the delivery pipe 11, and at the same time, the curved column 403 on the diffusion chamber 401 will feel the deformation of the pressure-regulating spring 1001. When the deformation of the pressure-regulating spring 1001 is too large, it will squeeze the curved column 403, thereby causing the curved column 403 to expand. The expanded curved column 403 will drive the moving guide rod 404 to move, and the moving guide rod 404 will drive the boost turntable 1303 to move, so that the boost turntable 1303 is engaged with the transmission worm 5, thereby completing the operation of triggering the boost.

[0036] As shown in Figures 3 and 8, a moving slider 301 is provided in the transmission pump housing 3, and the boost turntable 1303 is provided on the moving slider 301 and is rotationally connected to the moving slider 301. The moving slider 301 is slidingly connected to the transmission pump housing 3, and the moving slider 301 is rotationally connected to the end of the moving guide rod 404 away from the curved column 403. The moving guide rod 404 is rotationally connected to the transmission pump housing 3. The moving guide rod 404 is a multi-section structure, and the moving guide rod 404 is rotationally connected to the output pipe 4. When the moving guide rod 404 receives feedback from the curved column 403, it will drive the boost slider to move, indirectly driving the boost turntable 1303, so that the boost turntable 1303 contacts the transmission turbine.

[0037] As shown in Figure 3, a one-way water inlet valve 14 and a one-way water outlet valve 15 are provided in the delivery pipe 11. The one-way water inlet valve 14 and the one-way water outlet valve 15 are respectively arranged at the water inlet end and the water outlet end of the delivery pipe 11. A surge chamber 1101 is provided in the delivery pipe 11. The surge chamber 1101 is connected to the output pipe 4. A plurality of surge holes are provided on the surge chamber 1101. A surge diaphragm 405 is provided on the side of the output pipe 4 close to the surge chamber 1101. The surge diaphragm 405 is sealed and connected to the output pipe 4. During the delivery process, during the surging process, the structure of the surge diaphragm 405 can be added to generate negative pressure, thereby reducing the flow medium from directly entering the output pipe 4, reducing corrosion damage to the output pipe 4, and at the same time, under the action of the surge diaphragm, the flow of the flow medium can be made smoother, and the use of the surge diaphragm 405 is also more convenient for adjustment.

[0038] As shown in Figures 3 and 7, an adjustment ring 406 is provided on the output pipe 4, and a surge diaphragm 405 is provided on the adjustment ring 406. A transmission ring 407 is provided on the adjustment ring 406. A tooth groove is provided in the transmission ring 407, and a plurality of transmission springs 408 are provided on the tooth groove. Each transmission spring 408 is respectively slidably connected to the tooth groove. A telescopic ring 409 is provided at one end of each transmission spring 408 away from the tooth groove. The telescopic ring 409 is connected to the adjustment ring 406 through a telescopic bracket 410. Teeth are provided on the outer circle of the adjustment ring 406. A transmission rack 412 is rotatably connected to the inner surface of the adjustment ring 406. The transmission rack 412 is rotatably connected to the movable guide rod 404. The transmission rack 412 meshes with the teeth on the transmission ring 407. The rack 412 is slidably connected to the output pipe 4. When the curved column 403 moves with the movable guide rod 404, the movable guide rod 404 will also drive the transmission rack 412 to move, and the transmission rack 412 will rotate with the transmission ring 407. After the transmission ring 407 rotates, it will drive the telescopic ring 409 to expand or contract, thereby controlling the effective area of ​​the surging diaphragm 405. The internal transmission spring 408 can play a supporting role. When the effective area of ​​the surging diaphragm 405 increases, the pumping volume and the pumping volume can be fully increased, the pressure in the pump body can be adjusted, and the connecting rod 9 is cooperated to effectively increase the storage volume of the surging diaphragm 405, thereby improving the working efficiency of the surging diaphragm 405.

[0039] As shown in Figure 5, auxiliary balls 501 are provided on the threads of the transmission worm 5, and each auxiliary ball 501 is respectively rotatably connected to the threads on the transmission worm 5. The teeth on the reciprocating gear 7 are in sliding contact with the auxiliary balls 501. A stabilizing frame 302 is provided in the transmission pump housing 3, and the reciprocating gear 7 is slidably connected to the stabilizing frame 302. In order to make the transmission worm 5 drive the reciprocating gear 7 to run smoothly, the auxiliary balls 501 are against the threads of the transmission worm 5, and the transmission worm 5 will rotate with the reciprocating gear 7, reducing the direct contact between the threads on the reciprocating gear 7 and the threads on the transmission worm 5, reducing damage to parts, and the stabilizing frame 302 will stabilize the reciprocating gear 7 so that the reciprocating gear 7 can rotate smoothly.

[0040] The working principle of the present invention is as follows: when the motor 1 is working, it rotates, driving the transmission worm 5 to rotate, and the transmission worm 5 rotates in the transmission pump housing 3. The thread on the transmission worm 5 drives the reciprocating gear 7 to rotate. The auxiliary ball 501 on the transmission worm 5 will make the reciprocating gear 7 rotate more smoothly, and the transmission connecting rod 6 will support the reciprocating gear 7 to rotate. The rotation of the reciprocating gear 7 will drive the connecting rod 9 on the eccentric shaft 8 to move, and under the action of the connecting rod 9, the pressure regulating piston 10 will be driven to move in the output pipe 4, thereby generating negative pressure in the output pipe 4, changing the pressure difference of the liquid flow in the delivery pipe 11, and the diffusion chamber 401 on the output pipe 4 can sense the pressure change in the output pipe 4. The boosting turntable 1303 is thereby mobilized to move, and the boosting turntable 1303 is engaged with the transmission worm 5, driving the first boosting rod 1301 and the second boosting rod 1302 to move, performing boosting treatment on the connecting rod 9, thereby adapting to the liquid transmission under different pressures in the delivery pipe 11. In order to ensure the continuous engagement and normal operation of the transmission worm 5 and the reciprocating gear 7, it is necessary to timely introduce sufficient lubricating oil into the transmission pump housing 3 and the transmission pump housing 3, entering through the oil hole and being discharged from the oil outlet. When this positive displacement pump is working, the piston can also be fine-tuned by adjusting the bolt 601. While adapting to different water pressures, the surging diaphragm 405 will also change accordingly, thereby automatically adjusting the feed amount and pumping amount to adapt to more work situations.

[0041] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A positive displacement pump with overpressure protection function, characterized in that: The displacement pump comprises a running motor (1), the running motor (1) is provided with a protective shell (2), the protective shell (2) is provided with a transmission pump shell (3), the transmission pump shell (3) is communicated with the protection shell (2), an output pipe (4) is provided on the side of the transmission pump shell (3) away from the protection shell (2), the output pipe (4) is communicated with the transmission pump shell (3), the protection shell (2) is sleeved on the output end of the running motor (1), the protection shell (2) is provided with an oil hole, the transmission pump shell (3) is provided with an oil outlet hole, a transmission worm (5) is provided on the output end of the running motor (1), and a transmission connecting rod (6) is provided in the transmission pump shell (3). The transmission connecting rod (6) is slidably connected to the transmission pump housing (3); a reciprocating gear (7) is rotatably connected to the transmission connecting rod (6); the reciprocating gear (7) is rotatably connected to the transmission connecting rod (6); the teeth on the reciprocating gear (7) mesh with the teeth on the transmission worm (5); an eccentric shaft (8) is provided on the reciprocating gear (7); a connecting rod (9) is rotatably connected to the eccentric shaft (8); a pressure regulating piston (10) is provided at one end of the connecting rod (9) away from the eccentric shaft (8); the pressure regulating piston (10) is connected to the output pipe (4); a delivery pipe (11) is provided on the output pipe (4); and the delivery pipe (11) is communicated with the output pipe (4).

2. A displacement pump with overpressure protection function according to claim 1, characterized in that: A cooling pipe (12) is arranged on the inner wall of the protective shell (2), and the cooling pipe (12) passes through the inner wall of the protective shell (2) and is embedded in the transmission pump shell (3). A support bearing (201) is arranged in the protective shell (2), and a support spring (202) is sleeved on the support bearing (201). Two ends of the support spring (202) respectively abut against the outer circles of the protective shell (2) and the support bearing (201). The output end of the running motor (1) passes through the inner circle of the support bearing (201). An oil filter net (203) is arranged in the protective shell (2), and a follow-rotating fan wheel (204) is arranged on the oil filter net (203). The follow-rotating fan wheel (204) is rotatably connected to the oil filter net (203), and a plurality of oil throwing boxes (205) are arranged on the follow-rotating fan wheel (204).

3. A displacement pump with overpressure protection function according to claim 1, characterized in that: The transmission pump housing (3) is provided with a cooling hole, the cooling pipe (12) is embedded in the cooling hole, the transmission pump housing (3) is provided with an adjustment hole, the transmission connecting rod (6) is provided with an adjustment bolt (601), the thread on the adjustment bolt (601) is meshed with the thread on the adjustment hole, the adjustment bolt (601) is rotatably connected to the transmission connecting rod (6), a booster frame (13) is provided in the transmission pump housing (3), a booster ring (602) is sleeved on the connecting rod (9), and the booster ring (602) is connected to the booster frame (13) by sliding.

4. A displacement pump with overpressure protection function according to claim 3, characterized in that: The booster frame (13) is provided with a first booster rod (1301) and a second booster rod (1302), wherein the first booster rod (1301) and the second booster rod (1302) are respectively slidably connected to the booster frame (13). One end close to the boost ring (602) is respectively connected to the boost ring (602) in rotation. A boost turntable (1303) is arranged in the transmission pump housing (3). The boost turntable (1303) is connected to the transmission pump housing (3) in rotation. The boost turntable (1303) is provided with teeth. The teeth on the boost turntable (1303) mesh with the teeth on the transmission worm (5). The two ends of the boost turntable (1303) close to each other are respectively provided with boost wedges. The first boost rod (1301) and the second boost rod (1302) are in sliding contact with the boost wedges. The inner wall of the boost ring (602) is provided with lubricating balls (603). The lubricating balls (603) are connected to the boost ring (602) in rotation.

5. A displacement pump with overpressure protection function according to claim 1, characterized in that: The pressure regulating piston (10) comprises a pressure regulating spring (1001), an extruding piston (1002), and a rotating seat (1003); the rotating seat (1003) is rotatably connected to the linkage rod (9); the pressure regulating spring (1001) is arranged on the connecting seat; one end of the pressure regulating spring (1001) away from the rotating seat (1003) is connected to the extruding piston (1002); the extruding piston (1002) is in sliding contact with the output pipe (4); and a diffusion spring is arranged in the output pipe (4). A diffusion chamber (401) is provided with a diffusion ring (402) in the diffusion chamber (401), the diffusion ring (402) includes a plurality of curved columns (403), adjacent curved columns (403) are connected by a return spring, the curved columns (403) are in sliding contact with the diffusion chamber (401), a movable guide rod (404) is provided on one of the curved columns (403), and the movable guide rod (404) is connected to a booster turntable (1303) at one end away from the curved column (403).

6. A displacement pump with overpressure protection function according to claim 5, characterized in that: A movable slider (301) is arranged in the transmission pump housing (3); the booster turntable (1303) is arranged on the movable slider (301) and is rotationally connected to the movable slider (301); the movable slider (301) is slidingly connected to the transmission pump housing (3); the movable slider (301) is rotationally connected to an end of a movable guide rod (404) away from the curved column (403); the movable guide rod (404) is rotationally connected to the transmission pump housing (3); the movable guide rod (404) is a multi-section structure; and the movable guide rod (404) is rotationally connected to the output pipe (4).

7. A displacement pump with overpressure protection function according to claim 6, characterized in that: A one-way water inlet valve (14) and a one-way water outlet valve (15) are arranged in the delivery pipe (11); the one-way water inlet valve (14) and the one-way water outlet valve (15) are arranged at the water inlet end and the water outlet end of the delivery pipe (11), respectively; a surge chamber (1101) is arranged in the delivery pipe (11); the surge chamber (1101) is communicated with the output pipe (4); a plurality of surge holes are arranged on the surge chamber (1101); a surge diaphragm (405) is arranged on the side of the output pipe (4) close to the surge chamber (1101); the surge diaphragm (405) is sealed and connected to the output pipe (4).

8. A displacement pump with overpressure protection function according to claim 7, characterized in that: The output pipe (4) is provided with an adjustment ring (406), the surge diaphragm (405) is provided on the adjustment ring (406), the adjustment ring (406) is provided with a transmission ring (407), a tooth groove is provided in the transmission ring (407), a plurality of transmission springs (408) are provided on the tooth groove, each of the transmission springs (408) is slidably connected to the tooth groove, and a telescopic ring (408) is provided at one end of each transmission spring (408) away from the tooth groove. 9), the telescopic ring (409) is connected to the adjustment ring (406) through the telescopic bracket (410), the outer circle of the adjustment ring (406) is provided with teeth, the adjustment ring (406) is rotatably connected with a transmission rack (412), the transmission rack (412) is rotatably connected to the movable guide rod (404), the transmission rack (412) is meshed with the teeth on the transmission ring (407), and the transmission rack (412) is slidably connected to the output pipe (4).

9. A displacement pump with overpressure protection function according to claim 1, characterized in that: Auxiliary balls (501) are arranged on the threads on the transmission worm (5), and each of the auxiliary balls (501) is rotationally connected to the threads on the transmission worm (5). The teeth on the reciprocating gear (7) are in sliding contact with the auxiliary balls (501). A stabilizing frame (302) is arranged in the transmission pump housing (3), and the reciprocating gear (7) is slidably connected to the stabilizing frame (302).

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