CN111120244B

CN111120244B - Double-cylinder double-feeding hydraulic piston pump

Info

Publication number: CN111120244B
Application number: CN201911374646.5A
Authority: CN
Inventors: 钱小刚; 钱光勇; 嵇鹏
Original assignee: Jiangsu Wanchuan Hydraulic Machinery Equipment Co ltd
Current assignee: Jiangsu Wanchuan Hydraulic Machinery Equipment Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-12-28
Anticipated expiration: 2039-12-27
Also published as: CN111120244A

Abstract

The utility model provides a two feeding hydraulic piston pumps of double-cylinder, including two play pole double-acting hydraulic cylinder and two mud jars, wherein two these mud jars are installed respectively in these two both ends that play pole double-acting hydraulic cylinder, wherein these two play pole double-acting hydraulic cylinder are provided with two play pole double-acting hydraulic cylinder piston rods, two these mud jars all are provided with mud jar piston, each this mud jar piston of two these mud jars is installed respectively in the both ends of these two play pole double-acting hydraulic cylinder piston rods, wherein these two play pole double-acting hydraulic cylinder piston rods come the power of returning, drive this mud jar piston back and forth movement of two these mud jars at both ends, thereby the upper discharge mouth check valve that is set up in the both ends of two these mud jars and lower feed inlet check valve are opened in turn and are closed and are accomplished the feeding and arrange the material, so reciprocating motion realizes the pump sending material.

Description

Double-cylinder double-feeding hydraulic piston pump

Technical Field

The invention relates to the field of sludge pumps, in particular to an energy-saving and environment-friendly double-cylinder double-feeding hydraulic piston pump.

Background

The hydraulic piston type sludge pump sewage pump in the current market adopts a hydraulic oil cylinder as a power cylinder to drive a working cylinder piston to move, an inlet and an outlet adopt tee joints, and two one-way valves are respectively installed as an inlet one-way check valve and an outlet one-way check valve; the inlet and outlet one-way valves are in an angle general form, namely the inlet and the outlet of the one-way valve are 90 degrees, and materials are easy to generate turbulence in the transmission process; a charging barrel of the working cylinder is not provided with a cooling system, and heat generated in the operation of equipment cannot be conducted and dissipated in time, so that a sealing element of the piston of the working cylinder is aged and loses efficacy; when the hydraulic oil cylinder is used as a power cylinder and is used for reversing, the installation position of the reversing device is fixed, and the collision between a piston and two end covers is easily caused due to the motion inertia and the hysteresis of a reversing valve.

Disclosure of Invention

The invention aims to provide a double-cylinder double-feeding hydraulic piston pump which is energy-saving and environment-friendly, high in operation efficiency, small in power loss, extremely low in suction and discharge damping, compact in size and convenient to install, maintain and maintain.

In order to achieve at least one of the above objects, the present invention provides a double-cylinder double-feed hydraulic piston pump, comprising a double-rod double-acting hydraulic cylinder and two sludge cylinders, wherein the two sludge cylinders are respectively installed at two ends of the double-rod double-acting hydraulic cylinder, wherein the double-rod double-acting hydraulic cylinder is provided with a double-rod double-acting hydraulic cylinder piston rod, both the two sludge cylinders are provided with sludge cylinder pistons, each sludge cylinder piston of the two sludge cylinders is respectively installed at two ends of the double-rod double-acting hydraulic cylinder piston rod, wherein the double-rod double-acting hydraulic cylinder piston rod performs a return motion to drive the sludge cylinder pistons of the two sludge cylinders at two ends to move back and forth, and an upper discharge port check valve and a lower feed port check valve which are installed at two ends of the two sludge cylinders are alternately opened and closed to complete feeding and discharging, the reciprocating motion realizes the pumping of materials.

In some embodiments, the double-cylinder double-feed hydraulic piston pump further comprises a stroke-adjusting reversing device, and the stroke-adjusting reversing device is installed between the two sludge cylinders.

In some embodiments, the stroke adjustment and reversing device includes a first sealing guide sleeve, a first position sensor, a reversing valve rod, a position detection sensor, a second position sensor, and a second sealing guide sleeve, wherein the first sealing guide sleeve and the first position sensor are mounted at an end of one of the sludge cylinders, the second position sensor and the second sealing guide sleeve are mounted at an end of the other sludge cylinder, the reversing valve rod is mounted in the sealing guide sleeve holes of the first sealing guide sleeve and the second sealing guide sleeve, and the position detection sensor is mounted on the reversing valve rod.

In some embodiments, the sludge cylinder piston of each sludge cylinder and the dual-out rod dual-acting hydraulic cylinder piston rod of the dual-out rod dual-acting hydraulic cylinder are axially and radially fixed by a snap key, and a self-sealing nut axially locks and seals the piston.

In some embodiments, the double-rod-out double-acting hydraulic oil cylinder further comprises a cylinder barrel, a cylinder barrel flange, a buffer plunger, a first guide sleeve and a second guide sleeve, wherein the piston rod of the double-rod-out double-acting hydraulic oil cylinder and the buffer plunger are assembled in the cylinder barrel, the first guide sleeve is installed at one end of the cylinder barrel, the second guide sleeve is installed at the other end of the cylinder barrel, the piston of the piston rod of the double-rod-out double-acting hydraulic oil cylinder is in sliding sealing fit with the inner hole of the cylinder barrel, and the piston rod of the double-rod-acting hydraulic oil cylinder is in sliding sealing fit with the inner holes of the first guide sleeve and the second guide sleeve.

In some embodiments, each of the sludge cylinders further comprises a sludge cylinder working material cylinder and a sludge cylinder outer protection cylinder, wherein the sludge cylinder working material cylinder is sleeved in the sludge cylinder outer protection cylinder.

In some embodiments, the two ends of the sludge cylinder outer protection barrel are provided with cooling ports, an annular cavity is formed between the sludge cylinder working material barrel and the sludge cylinder outer protection barrel, and the two ends of the sludge cylinder working material barrel and the outer protection barrel are provided with sealing parts for supporting and sealing in a clearance fit mode.

In some embodiments, the sludge cylinder piston is in sliding sealing fit in the inner hole of the sludge cylinder working material cylinder, the sludge cylinder outer protection cylinder is sleeved on the excircle of the sludge cylinder working material cylinder, and the annular cavity is formed between the excircle of the sludge cylinder working material cylinder and two ends of the inner hole of the sludge cylinder outer protection cylinder.

In some embodiments, each of the sludge cylinders further comprises a sludge cylinder self-locking nut and a sludge cylinder clamp key, wherein the sludge cylinder piston is assembled at the end of the piston rod of the double-rod double-acting hydraulic cylinder, the sludge cylinder clamp key is clamped in a clamp key groove at the end of the piston rod of the double-rod double-acting hydraulic cylinder, and the sludge cylinder self-locking nut is screwed on the external thread at the end of the piston rod of the double-rod double-acting hydraulic cylinder.

In some embodiments, the two-cylinder dual-feed hydraulic piston pump further comprises an outlet manifold mounted to the outlet of each of the sludge cylinders, and a feed manifold mounted to the inlet of each of the sludge cylinders.

In some embodiments, the discharge collecting pipe is connected with the discharge port of each sludge cylinder through a flange, and the feeding shunt pipe is connected with the feeding port of each sludge cylinder through a flange.

In some embodiments, a three-way low-damping double-acting check valve and a four-way low-damping double-acting check valve are arranged at two ends of at least one of the sludge cylinders, so that when the piston rod of the double-rod double-acting hydraulic cylinder drives the piston of each sludge cylinder at two ends to move back and forth by the aid of the return work, the three-way low-damping double-acting check valve at two ends of each sludge cylinder and the upper discharge port check valve and the lower discharge port check valve of the four-way low-damping double-acting check valve are opened and closed alternately to complete feeding and discharging.

In some embodiments, the three-way low damping double-acting one-way valve is an integrated structure and has the functions of upper discharging one-way check and lower feeding one-way check.

In some embodiments, the four-way low-damping double-acting one-way valve is an integrated structure and has the functions of upper discharging one-way check and lower feeding one-way check.

In some embodiments, at least one of the sludge cylinders is provided with a three-way low-damping double-acting check valve and a four-way low-damping double-acting check valve at two ends, and the double-cylinder double-feeding hydraulic piston pump further comprises a discharging collecting pipe and a feeding dividing pipe.

In some embodiments, the three-way low-damping double-acting one-way valve comprises a sludge cylinder three-way valve body, wherein the upper port and the lower port of the sludge cylinder three-way valve body are respectively connected with the discharge collecting pipe and the feeding shunt pipe through flanges, and the middle port of the sludge cylinder three-way valve body is connected with the sludge cylinder working material barrel.

In some embodiments, the four-way low-damping double-acting check valve comprises a sludge cylinder four-way valve body, the upper port and the lower port of the sludge cylinder four-way valve body are respectively connected with the discharge collecting pipe and the feed dividing pipe through flanges, the middle port is connected with the sludge cylinder working material barrel, and the other middle port is fixedly connected with the double-rod double-acting hydraulic oil cylinder through a flange.

In some embodiments, the middle port of the three-way type low damping double-acting check valve of the sludge cylinder is connected with the sludge cylinder outer protection cylinder at one end of the rodless cavity of the sludge cylinder working material cylinder, and the sludge cylinder outer protection cylinder is used as a rodless cavity end cover of the sludge cylinder working material cylinder.

In some embodiments, the middle opening of the sludge cylinder four-way valve body of the four-way low-damping double-acting one-way valve is connected with the sludge cylinder outer protection cylinder at one end of the rod cavity of the sludge cylinder working material cylinder through a flange, and the sludge cylinder outer protection cylinder serves as a rod cavity end cover of the sludge cylinder working material cylinder.

In some embodiments, the outer circle positioning step at the end part of the sludge cylinder three-way valve body is provided with a sealing piece and is installed in an inner hole at the end part of the sludge cylinder working material barrel for static sealing, wherein the sludge cylinder three-way valve body is connected with the end part of the sludge cylinder outer protection barrel.

In some embodiments, the outer circle positioning step at one end of the sludge cylinder four-way valve body is provided with a sealing element and is installed in an inner hole at the end part of the sludge cylinder working material cylinder for static sealing, the sludge cylinder four-way valve body is connected with the end part of the sludge cylinder outer protection cylinder, and the inner hole at the other end of the sludge cylinder four-way valve body is provided with a sealing device and is in sliding sealing with the piston rod of the double-rod double-acting hydraulic oil cylinder extending into the hole of the sealing device.

In some embodiments, the three-way low damping double-acting one-way valve further comprises a sludge cylinder three-way valve body discharge port valve core, a sludge cylinder three-way valve body discharge port valve core seat, a sludge cylinder three-way valve body discharge port valve core gasket, a sludge cylinder three-way valve body feed port valve core and a sludge cylinder three-way valve body feed port valve core gasket, wherein the sludge cylinder three-way valve body discharge port valve core seat is installed in an upper port inner hole of the sludge cylinder three-way valve body, the sludge cylinder three-way valve body discharge port valve core is installed in an inner hole of the sludge cylinder three-way valve body discharge port valve core seat in a sliding fit manner, the sludge cylinder three-way valve body discharge port valve core gasket is installed on an inner hole step of the sludge cylinder three-way valve body below the sludge cylinder three-way valve body discharge port valve core, wherein the sludge cylinder three-way valve body feed port valve core is installed in a valve core seat inner hole at the upper portion of the sludge cylinder three-way valve body feed port, the sealing gasket of the feed port valve core of the sludge cylinder three-way valve body is arranged on the step of the inner hole of the sludge cylinder three-way valve body below the feed port valve core of the sludge cylinder three-way valve body.

In some embodiments, the four-way low damping double-acting check valve further comprises a sludge cylinder four-way valve body discharge port valve core, a sludge cylinder four-way valve body discharge port valve core seat, a sludge cylinder four-way valve body discharge port valve core gasket, a sludge cylinder four-way valve body feed port valve core and a sludge cylinder four-way valve body feed port valve core gasket, wherein the sludge cylinder four-way valve body discharge port valve core seat is installed in an upper opening inner hole of the sludge cylinder four-way valve body, the sludge cylinder four-way valve body discharge port valve core is installed in an inner hole of the sludge cylinder four-way valve body discharge port valve core seat in a sliding fit manner, the sludge cylinder four-way valve body discharge port valve core gasket is installed on an inner hole step of the sludge cylinder four-way valve body below the sludge cylinder four-way valve body discharge port valve core, wherein the sludge cylinder four-way valve body feed port valve core is installed in an inner hole of the valve core seat at the upper portion of the sludge cylinder four-way valve body feed port, the sealing gasket of the sludge cylinder four-way valve body feed port valve core is arranged on the inner hole step of the sludge cylinder four-way valve body below the sludge cylinder four-way valve body feed port valve core.

Compared with the prior art, the invention has the following beneficial effects: the double-cylinder double-feeding hydraulic piston pump is provided with a double-outlet-rod double-acting hydraulic oil cylinder, a left sludge cylinder arranged at the left end of the double-outlet-rod double-acting hydraulic oil cylinder, a right sludge cylinder arranged at the right end of the double-outlet-rod double-acting hydraulic oil cylinder, a stroke adjusting reversing device arranged between the left sludge cylinder and the right sludge cylinder, discharging collecting pipes arranged on the left sludge cylinder and the right sludge cylinder, and feeding flow dividing pipes arranged on the left sludge cylinder and the right sludge cylinder. The three-way low-damping double-acting one-way valve has an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return and serves as a rod-free cavity sealing end cover of the working material cylinder, and has the functions of upper discharging one-way non-return and lower feeding one-way non-return and serves as a rod cavity sealing end cover of the working material cylinder, and has the functions of sliding sealing with a double-acting piston rod extending into a hole of the double-acting one-way valve and connecting with a middle double-outlet rod double-acting hydraulic oil cylinder. The upper discharge port one-way valve and the lower feed port one-way valve are both in a straight-through structure, materials directly enter the sludge cylinder working material barrel from the feed flow dividing pipe through the straight-through lower feed port one-way valve, the movement distance is short without passing through other pipelines and elbows in the middle, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is low; the material directly gets into ejection of compact collecting pipe from work feed cylinder through straight-through type upper discharge gate check valve, and the centre need not to pass through other pipelines and elbow movement distance short and do not change the flow direction and do not produce the little operating efficiency height of torrent resistance. The effective strokes at the two ends of the double-outlet-rod double-acting hydraulic oil cylinder can be adjusted by adjusting the mounting positions of the position sensors mounted on the two-end four-way type low-damping double-acting one-way valve body, so that the pistons cannot contact with guide sleeves at the two ends when the double-outlet-rod double-acting hydraulic oil cylinder moves back and forth at a high speed, and cylinder collision caused by large movement inertia is avoided. The working material barrels made of different materials can be conveniently replaced according to different abrasion conditions or material properties of the working material barrels; cooling media are introduced into cooling ports arranged at two ends of the outer protection cylinder to enter the annular cavity, a large amount of heat energy generated by back-and-forth movement friction during working between the sludge cylinder working material cylinder and the sludge cylinder piston is taken away, aging failure of the sludge cylinder piston sealing element is effectively delayed, the working material cylinder suspends on the sludge cylinder piston, cylindricity errors and assembly coaxiality errors caused by working material cylinder processing can be effectively compensated, eccentric wear of an inner hole of the working material cylinder and the sludge cylinder piston cannot be caused, and the service lives of the working material cylinder, the piston and the piston sealing element are prolonged.

Drawings

Fig. 1 is a perspective view of a dual cylinder dual feed hydraulic piston pump in accordance with a preferred embodiment of the present invention.

Fig. 2 is a schematic perspective view of the double cylinder double feed hydraulic piston pump according to the above preferred embodiment of the present invention.

Detailed Description

For the purpose of promoting an understanding of the invention, reference will now be made in detail to the embodiments illustrated in the drawings. The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are intended to be illustrative only and not limiting, and other obvious modifications will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention. Based on the understanding of the principle of the present invention, those skilled in the art can obtain other drawings and other embodiments without creative effort, and the scope of the present invention is covered by the claims.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

Fig. 1 to 2 show a double-cylinder double-feed hydraulic piston pump according to a preferred embodiment of the present invention, which has high operating efficiency, low power loss, low suction and discharge damping, compact size, convenient installation, maintenance, energy saving and environmental protection.

The double-cylinder double-feeding hydraulic piston pump comprises a double-outlet-rod double-acting hydraulic oil cylinder 100, a left sludge cylinder 200 and a right sludge cylinder 300, wherein the left sludge cylinder 200 is installed at the left end of the double-outlet-rod double-acting hydraulic oil cylinder 100, and the right sludge cylinder is installed at the right end of the double-outlet-rod double-acting hydraulic oil cylinder 100.

Specifically, the double-rod and double-acting hydraulic oil cylinder 100 comprises a cylinder 101, a cylinder flange, a piston rod 102 of the double-rod and double-acting hydraulic oil cylinder, a buffer plunger, a first guide sleeve 103 and a second guide sleeve 107. Further, the piston rod 102 of the double-rod-out double-acting hydraulic oil cylinder and the buffer plunger are assembled in the cylinder 101, the first guide sleeve 103 is installed at the left end of the cylinder 101, the second guide sleeve 107 is installed at the right end of the cylinder 101, the piston of the piston rod 102 of the double-rod-out double-acting hydraulic oil cylinder is in sliding sealing fit with the inner hole of the cylinder 101, and the piston rod of the piston rod 102 of the double-rod-out double-acting hydraulic oil cylinder is in sliding sealing fit with the inner holes of the first guide sleeve 103 and the second guide sleeve 107.

Specifically, the double-cylinder double-feed hydraulic piston pump further comprises a discharge manifold 400 and a feed dividing pipe 500, wherein the discharge manifold 400 and the feed dividing pipe 500 are installed on the left sludge cylinder 200 and the right sludge cylinder 300. Further, the discharging collecting pipe 400 is connected with the discharging ports of the left sludge cylinder 200 and the right sludge cylinder 300 through flanges, and the feeding dividing pipe 500 is connected with the feeding ports of the left sludge cylinder 200 and the right sludge cylinder 300 through flanges.

Specifically, the left sludge cylinder 200 comprises a left sludge cylinder piston 201, a left sludge cylinder three-way low-damping double-acting one-way valve 202, a left sludge cylinder four-way low-damping double-acting one-way valve 203, a left sludge cylinder working material cylinder 204, a left sludge cylinder outer protection cylinder 205, a left sludge cylinder self-locking nut 206 and a left sludge cylinder clamp key 207.

Specifically, the left sludge cylinder three-way low-damping double-acting check valve 202 of the left sludge cylinder 200 comprises a left sludge cylinder three-way valve body 208, a left sludge cylinder three-way valve body discharge port valve core 209, a left sludge cylinder three-way valve body discharge port valve core seat 210, a left sludge cylinder three-way valve body discharge port valve core gasket 211, a left sludge cylinder three-way valve body feed port valve core 212 and a left sludge cylinder three-way valve body feed port valve core gasket 213; the upper and lower ports of the left sludge cylinder three-way valve body 208 are respectively connected with the discharging collecting pipe 400 and the feeding shunt pipe 500 through flanges, and the middle port is connected with the left sludge cylinder outer protection cylinder 205 at one end of the rodless cavity of the left sludge cylinder working material cylinder 204 and is used as a rodless cavity end cover of the left sludge cylinder working material cylinder 204.

Specifically, the left sludge cylinder four-way low-damping double-acting check valve 203 comprises a left sludge cylinder four-way valve body 288, a left sludge cylinder four-way valve body discharge port valve core 299, a left sludge cylinder four-way valve body discharge port valve core seat 21010, a left sludge cylinder four-way valve body discharge port valve core gasket 21111, a left sludge cylinder four-way valve body feed port valve core 21212 and a left sludge cylinder four-way valve body feed port valve core gasket 21313; the upper and lower ports of the left sludge cylinder four-way valve body 288 are respectively connected with the discharge collecting pipe 400 and the feeding shunt pipe 500 through flanges, the middle port is connected with the left sludge cylinder outer protective cylinder 205 at one end of the left sludge cylinder working material cylinder 204 with a rod cavity through a flange, the left sludge cylinder outer protective cylinder serves as a rod cavity end cover of the left sludge cylinder working material cylinder 204, and the other middle port is fixedly connected with the double-rod double-acting hydraulic oil cylinder 100 through a flange.

Further, the left sludge cylinder piston 201 is assembled at the left end of the double-outlet-rod double-acting hydraulic cylinder piston rod 102, the left sludge cylinder clamping key 207 is clamped in a left-end clamping key groove of the double-outlet-rod double-acting hydraulic cylinder piston rod 102, the left sludge cylinder self-locking nut 206 is screwed on a left-end external thread of the double-outlet-rod double-acting hydraulic cylinder piston rod 102, and the left sludge cylinder piston 201 is in sliding sealing fit in an inner hole of the left sludge cylinder working material cylinder 204; the left sludge cylinder outer protection barrel 205 is sleeved on the excircle of the left sludge cylinder working material barrel 204, an annular cavity is arranged between the excircle of the left sludge cylinder working material barrel 204 and two ends of an inner hole of the left sludge cylinder outer protection barrel 205, and sealing parts are arranged at two ends of the left sludge cylinder working material barrel 204 and the left sludge cylinder outer protection barrel 205 in a clearance fit manner to support and seal the clearance; a sealing piece is arranged on the right-end excircle positioning step of the left sludge cylinder three-way valve body 208, the right-end excircle positioning step of the left sludge cylinder three-way valve body 208 is installed in the left-end inner hole of the left sludge cylinder working material cylinder 204 for static sealing, and the left sludge cylinder three-way valve body 208 is connected with the left end of the left sludge cylinder outer protection cylinder 205 through a screw; the outer circle positioning step at the left end of the left sludge cylinder four-way valve body 288 is provided with a sealing element, the outer circle positioning step at the left end of the left sludge cylinder four-way valve body 288 is installed in the inner hole at the right end of the left sludge cylinder working material cylinder 204 and is in static sealing, and the left sludge cylinder four-way valve body 288 is connected with the right end of the left sludge cylinder outer protection cylinder 205 through a screw; the right end inner hole of the left sludge cylinder four-way valve body 288 is provided with a sealing device and is in sliding seal with the piston rod 102 of the double-rod double-acting hydraulic oil cylinder extending into the hole, and the right end of the left sludge cylinder four-way valve body 288 is fixedly connected with the left end flange of the cylinder barrel 101 through a screw. The valve core seat 21010 of the discharge port of the left sludge cylinder four-way valve body is installed in an upper opening inner hole of the left sludge cylinder four-way valve body 288, the valve core 299 of the discharge port of the left sludge cylinder four-way valve body is installed in the inner hole of the valve core seat 21010 of the discharge port of the left sludge cylinder four-way valve body in a sliding fit manner, and the valve core sealing gasket 21111 of the discharge port of the left sludge cylinder four-way valve body is installed on an inner hole step of the left sludge cylinder four-way valve body 288 below the valve core 299 of the discharge port of the left sludge cylinder four-way valve body. The left sludge cylinder four-way valve body feed inlet valve core 21212 is installed in the inner hole of the valve core seat at the upper part of the feed inlet of the left sludge cylinder four-way valve body 288 in a sliding fit mode, and the left sludge cylinder four-way valve body feed inlet valve core sealing gasket 21313 is installed on the inner hole step of the left sludge cylinder four-way valve body 288 below the left sludge cylinder four-way valve body feed inlet valve core 21212. The left sludge cylinder three-way valve body discharge hole valve core seat 210 is installed in an upper opening inner hole of the left sludge cylinder three-way valve body 208, the left sludge cylinder three-way valve body discharge hole valve core 209 is installed in the inner hole of the left sludge cylinder three-way valve body discharge hole valve core seat 210 in a sliding fit mode, the left sludge cylinder three-way valve body discharge hole valve core sealing gasket 211 is installed below the left sludge cylinder three-way valve body discharge hole valve core 209 on an inner hole step of the left sludge cylinder three-way valve body 208, the left sludge cylinder three-way valve body feed hole valve core 212 is installed in a valve core seat inner hole in the upper portion of the left sludge cylinder three-way valve body feed hole, and the left sludge cylinder three-way valve body feed hole valve core sealing gasket 213 is installed below the left sludge cylinder three-way valve body feed hole valve core 212 on the inner hole step of the left sludge cylinder three-way valve body 208. It will be appreciated by those skilled in the art that the foregoing screw connection is merely exemplary in this preferred embodiment of the present invention, and that other connection methods, such as welding, are also possible, and the present invention is not limited in this respect.

Preferably, in this preferred embodiment of the present invention, the left sludge cylinder three-way valve body 208 of the left sludge three-way low damping double-acting check valve 202 of the left sludge cylinder 200 is an integrated three-way, the middle port is fixedly connected to the left sludge cylinder outer protection barrel 205 at one end of the rodless cavity of the left sludge cylinder working barrel 204, the outer circle positioning step is provided with a sealing device and an inner hole static seal of the left sludge cylinder working barrel 204 sleeved on the outer circle thereof, and the rodless cavity of the left sludge cylinder 200 is sealed to serve as a sealing end cover of the rodless cavity of the sludge pump of the present invention; a straight-through discharge port one-way valve is arranged inside the upper opening of the left sludge cylinder three-way valve body 208, and the upper opening is connected with the discharge collecting pipe 400; the lower opening of the left sludge cylinder three-way valve body 208 is internally provided with a straight-through type feed inlet one-way valve, and the lower opening is connected with the feed shunt pipe 500.

Preferably, in this preferred embodiment of the present invention, the left sludge cylinder four-way valve body 288 of the left sludge four-way low damping double-acting check valve 203 is an integrated four-way, a straight-through discharge port check valve is arranged inside the upper port of the left sludge cylinder four-way valve body 288, and the upper port is connected with the discharge manifold 400; a straight-through type feed inlet one-way valve is arranged inside the lower opening of the left sludge cylinder four-way valve body 288, and the lower opening is connected with the feed shunt pipe 500; the middle opening is fixedly connected with the left sludge cylinder outer protection cylinder 205 at one end of the rod cavity of the left sludge cylinder working material cylinder 204, the outer circle positioning step is provided with a sealing device and an inner hole static seal which is sleeved on the outer circle of the sealing device and is used for sealing the rod cavity of the left sludge cylinder 200 and serving as a sealing end cover of the rod cavity of the sludge pump; the other inner hole in the middle is provided with a sealing device and a piston rod 102 of the double-rod double-acting hydraulic oil cylinder extending into the inner hole in a sliding sealing manner, so that a rod cavity of the left sludge cylinder 200 is sealed; the piston rod 102 of the double-rod double-acting hydraulic oil cylinder extends into the left sludge cylinder 200 to be connected with the left sludge cylinder piston 201, and is fixedly connected with the cylinder 101 of the double-rod double-acting hydraulic oil cylinder 100 through a flange.

It is worth mentioning that the left sludge cylinder three-way type low-damping double-acting one-way valve 202 is an integrated structure, has the functions of upper discharging one-way check and lower feeding one-way check, and is used as a rodless cavity sealing end cover of the left sludge cylinder working material cylinder 204. The left sludge cylinder four-way type low-damping double-acting one-way valve 203 is an integrated structure, has the functions of upper discharging one-way check and lower feeding one-way check, and serves as a rod cavity sealing end cover of the left sludge cylinder working material cylinder 204, and has the functions of sliding sealing with the piston rod 102 of the double-rod double-acting hydraulic oil cylinder extending into the hole of the piston rod and connecting with the middle double-rod double-acting hydraulic oil cylinder 100. The upper discharge port one-way valve is in a straight-through structure and is directly connected with the discharge collecting pipe 400, the lower feed port one-way valve is in a straight-through structure and is directly connected with the feed dividing pipe 500, materials directly enter the left sludge cylinder working material barrel 204 from the feed dividing pipe 500 through the straight-through lower feed port one-way valve, the movement distance is short without other pipelines and elbows in the middle, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is low; the materials directly enter the discharging collecting pipe 400 from the left sludge cylinder working material cylinder 204 through the straight-through type upper discharging port one-way valve, and the middle part of the discharging collecting pipe does not need to pass through other pipelines and bends, has short movement distance, does not change the flowing direction, does not generate turbulent flow resistance, and has small operation efficiency.

Specifically, the right sludge cylinder 300 comprises a right sludge cylinder piston 301, a right sludge cylinder four-way type low-damping double-acting one-way valve 302, a right sludge cylinder three-way type low-damping double-acting one-way valve 303, a right sludge cylinder working material cylinder 304, a right sludge cylinder outer protection cylinder 305, a right sludge cylinder self-locking nut 306 and a right sludge cylinder clamping key 307.

Specifically, the right sludge cylinder three-way low-damping double-acting check valve 303 comprises a right sludge cylinder three-way valve body 388, a right sludge cylinder three-way valve body discharge port valve core 399, a right sludge cylinder three-way valve body discharge port valve core seat 31010, a right sludge cylinder three-way valve body discharge port valve core sealing gasket 31111, a right sludge cylinder three-way valve body feed port valve core 31212 and a right sludge cylinder three-way valve body feed port valve core sealing gasket 31313; the upper and lower ports of the right sludge cylinder three-way valve body 388 are respectively connected with the discharging collecting pipe 400 and the feeding flow dividing pipe 500 through flanges, and the middle port is connected with the right sludge cylinder outer protection cylinder 305 at one end of the rodless cavity of the right sludge cylinder working charging barrel 304 and serves as a rodless cavity end cover of the right sludge cylinder working charging barrel 304. Specifically, the right sludge cylinder four-way type low-damping double-acting check valve 302 comprises a right sludge cylinder four-way valve body 308, a right sludge cylinder four-way valve body discharge port valve core 309, a right sludge cylinder four-way valve body discharge port valve core seat 310, a right sludge cylinder four-way valve body discharge port valve core sealing gasket 311, a right sludge cylinder four-way valve body feed port valve core 312 and a right sludge cylinder four-way valve body feed port valve core sealing gasket 313; the upper port and the lower port of the right sludge cylinder four-way valve body 308 are respectively connected with the discharge collecting pipe 400 and the feeding shunt pipe 500 through flanges, the middle port is connected with the right sludge cylinder outer protection cylinder 305 at one end, provided with a rod cavity, of the right sludge cylinder working material cylinder 304 through a flange and serves as a rod cavity end cover of the right sludge cylinder working material cylinder 304, and the other middle port is fixedly connected with the double-rod double-acting hydraulic oil cylinder 100 through a flange.

Further, the right sludge cylinder piston 301 is assembled at the right end of the double-outlet-rod double-acting hydraulic cylinder piston rod 102, the right sludge cylinder clamping key 307 is clamped in a right clamping key groove of the double-outlet-rod double-acting hydraulic cylinder piston rod 102, the right sludge cylinder self-locking nut 306 is screwed on a right external thread of the double-outlet-rod double-acting hydraulic cylinder piston rod 102, and the right sludge cylinder piston 301 is in sliding sealing fit in an inner hole of the right sludge cylinder working material barrel 304; the right sludge cylinder outer protection barrel 305 is sleeved on the excircle of the right sludge cylinder working material barrel 304, an annular cavity is arranged between the excircle of the right sludge cylinder working material barrel 304 and two ends of an inner hole of the right sludge cylinder outer protection barrel 305, and two ends of the right sludge cylinder working material barrel 304 and two ends of the right sludge cylinder outer protection barrel 305 are in clearance fit with each other and are provided with sealing piece supports and seals; a sealing piece is arranged on a positioning step of the excircle at the left end of the right sludge cylinder three-way valve body 388, the positioning step of the excircle at the left end of the right sludge cylinder three-way valve body 388 is installed in an inner hole at the right end of the right sludge cylinder working material cylinder 304 for static sealing, and is connected with the right end of the right sludge cylinder outer protection cylinder 305 sleeved outside the right sludge cylinder working material cylinder 304 through a screw; a sealing piece is arranged on a positioning step of the right-end excircle of the right-sludge-cylinder four-way valve body 308 and is installed in an inner hole at the left end of the right-sludge-cylinder working material cylinder 304 for static sealing, and the sealing piece is connected with the left end of the right-sludge-cylinder outer protection cylinder 305 sleeved outside the right-sludge-cylinder working material cylinder 304 through a screw; the left end inner hole of the right sludge cylinder four-way valve body 308 is provided with a sealing device and the piston rod 102 of the double-rod double-acting hydraulic oil cylinder extending into the hole of the sealing device in a sliding sealing manner, and the left end of the right sludge cylinder four-way valve body 308 is fixedly connected with the right end flange of the cylinder barrel 101 through a screw. The right sludge cylinder four-way valve body discharge port valve core seat 310 is installed in an upper port inner hole of the right sludge cylinder four-way valve body 308, the right sludge cylinder four-way valve body discharge port valve core 309 is installed in an inner hole of the right sludge cylinder four-way valve body discharge port valve core seat 310 in a sliding fit mode, the right sludge cylinder four-way valve body discharge port valve core sealing gasket 311 is installed below the right sludge cylinder four-way valve body discharge port valve core 309 on an inner hole step of the right sludge cylinder four-way valve body 308, the right sludge cylinder four-way valve body feed port valve core 312 is installed in a valve core seat inner hole in the upper portion of a feed port of the right sludge cylinder four-way valve body 308 in a sliding fit mode, and the right sludge cylinder four-way valve body feed port valve core sealing gasket 313 is installed below the right sludge cylinder four-way valve body feed port valve core 312 on the inner hole step of the right sludge cylinder four-way valve body 308. The right sludge cylinder three-way valve body discharge port valve core seat 31010 is installed in an upper port inner hole of the right sludge cylinder three-way valve body 388, a right sludge cylinder three-way valve body discharge port valve core 399 is installed in the right sludge cylinder three-way valve body discharge port valve core seat 31010 in a sliding fit manner, a right sludge cylinder three-way valve body discharge port valve core gasket 31111 is installed below the right sludge cylinder three-way valve body discharge port valve core 399 on a right sludge cylinder three-way valve body 388 inner hole step, a right sludge cylinder three-way valve body feed port valve core 31212 is installed in a valve core seat inner hole on the upper portion of a right sludge cylinder three-way valve body feed port 388 in a sliding fit manner, and a right sludge cylinder three-way valve body feed port valve core gasket 13 is installed below the right sludge cylinder three-way valve body feed port valve core 31212 on the right sludge cylinder three-way valve body 388 inner hole step. It will be appreciated by those skilled in the art that the foregoing screw connection is merely exemplary in this preferred embodiment of the present invention, and that other connection methods, such as welding, are also possible, and the present invention is not limited in this respect.

Preferably, in this preferred embodiment of the present invention, the right sludge cylinder three-way valve body 388 of the right sludge cylinder three-way low damping double-acting check valve 303 of the right sludge cylinder 300 is an integrated three-way valve, the middle port is fixedly connected to the right sludge cylinder outer protective cylinder 305 at one end of the rodless cavity of the right sludge cylinder working cylinder 304, the outer circle positioning step is provided with a sealing device and an inner hole static seal of the right sludge cylinder working cylinder 304 sleeved on the outer circle thereof, and the rodless cavity of the right sludge cylinder 300 is sealed to serve as a sealing end cover of the rodless cavity of the sludge pump of the present invention; a straight-through discharge port one-way valve is arranged inside an upper opening of the right sludge cylinder three-way valve body 388, and the upper opening is connected with the discharge collecting pipe 400; the lower opening of the right sludge cylinder three-way valve body 388 is internally provided with a straight-through type feed inlet one-way valve, and the lower opening is connected with the feeding shunt pipe 500.

Preferably, in this preferred embodiment of the present invention, the right sludge cylinder three-way valve body 388 of the right sludge cylinder four-way type low damping double-acting check valve 302 is an integrated four-way, a straight-through discharge port check valve is arranged inside the upper port of the right sludge cylinder three-way valve body 388, and the upper port is connected with the discharge collecting pipe 400; a straight-through type feed inlet one-way valve is arranged inside the lower opening of the right sludge cylinder three-way valve body 388, and the lower opening is connected with the feed dividing pipe 500; the right sludge cylinder outer protection cylinder 305 at one end of the rod cavity of the right sludge cylinder working material cylinder 304 at the middle port is fixedly connected, the outer circle positioning step is provided with a sealing device and an inner hole of the right sludge cylinder working material cylinder 304 sleeved on the outer circle of the sealing device for static sealing, and the rod cavity of the right sludge cylinder 300 is sealed to be used as a sealing end cover of the rod cavity of the sludge pump; the other inner hole in the middle is provided with a sealing device and a piston rod 102 of the double-rod double-acting hydraulic oil cylinder extending into the inner hole in a sliding sealing manner, so that a rod cavity of the right sludge cylinder 300 is sealed; the piston rod 102 of the double-rod double-acting hydraulic oil cylinder extends into the right sludge cylinder 300 to be connected with the right sludge cylinder piston 301, and is fixedly connected with the cylinder barrel 101 of the double-rod double-acting hydraulic oil cylinder 100 through a flange.

It is worth mentioning that the right sludge cylinder three-way type low-damping double-acting one-way valve 303 is an integrated structure, has the functions of upper discharging one-way non-return and lower feeding one-way non-return, and is used as a rodless cavity sealing end cover of the right sludge cylinder working material cylinder 304. The right sludge cylinder four-way type low-damping double-acting one-way valve 302 is an integrated structure, has the functions of upper discharging one-way check and lower feeding one-way check, and serves as a rod cavity sealing end cover of the right sludge cylinder working material cylinder 304, and has the functions of sliding sealing with the piston rod 102 of the double-rod double-acting hydraulic oil cylinder extending into the hole of the piston rod and connecting with the middle double-rod double-acting hydraulic oil cylinder 100. The upper discharge port one-way valve is in a straight-through structure and is directly connected with the discharge collecting pipe 400, the lower feed port one-way valve is in a straight-through structure and is directly connected with the feed dividing pipe 500, materials directly enter the right sludge cylinder working material barrel 304 from the feed dividing pipe 500 through the straight-through lower feed port one-way valve, the middle part does not need to pass through other pipelines and an elbow, the movement distance is short, the flowing direction is not changed, turbulent flow resistance is not generated, and the operation efficiency is low; the materials directly enter the discharging collecting pipe from the right sludge cylinder working material cylinder 304 through the straight-through type upper discharging port one-way valve, and the middle part of the discharging collecting pipe does not need to pass through other pipelines and bends, has short movement distance, does not change the flowing direction, does not generate turbulent flow resistance, and has small operation efficiency.

Specifically, the left sludge cylinder three-way low-damping double-acting check valve 202 and the left sludge cylinder four-way low-damping double-acting check valve 203 are installed at the left and right ends of the left sludge cylinder 200, and the right sludge cylinder four-way low-damping double-acting check valve 302 and the right sludge cylinder three-way low-damping double-acting check valve 303 are installed at the left and right ends of the right sludge cylinder 300. The piston rod 102 of the double-rod double-acting hydraulic cylinder returns back and forth left and right to drive the left sludge cylinder piston 201 and the right sludge cylinder piston 301 at two ends to move back and forth, and then the three-way low-damping double-acting check valve and the four-way low-damping double-acting check valve at two ends of the left sludge cylinder 200, namely the left sludge cylinder three-way low-damping double-acting check valve 202 and the left sludge cylinder four-way low-damping double-acting check valve 203, and the right sludge cylinder 300 three-way low-damping double-acting check valve and the four-way low-damping double-acting check valve, namely the right sludge cylinder four-way low-damping double-acting check valve 302 and the right sludge cylinder three-way low-damping double-acting check valve 303, wherein the upper discharge port check valve and the lower discharge port check valve of the three-way low-damping double-acting check valve and the four-way low-damping double-acting check valve are alternately opened and closed to complete feeding and discharging, the reciprocating motion realizes the pumping of materials.

The right cavity of the double-outlet-rod double-acting hydraulic oil cylinder 100 is supplied with oil, the piston rod 102 of the double-outlet-rod double-acting hydraulic oil cylinder pushes the piston 201 of the left sludge cylinder to move leftwards, the left sludge cylinder three-way low-damping double-acting check valve 202 at the left end of the left sludge cylinder 200 has the left sludge cylinder three-way valve body feed port valve core 212 moving downwards to press the left sludge cylinder three-way valve body feed port valve core sealing gasket 213 tightly so as to close the feed port, the left sludge cylinder three-way low-damping double-acting one-way valve 202 at the left end of the left sludge cylinder 200 has the left sludge cylinder three-way valve body discharge port valve core 209 moving upwards to separate from the left sludge cylinder three-way valve body discharge port valve core sealing gasket 211 so as to open the discharge port, the material of the rodless cavity on the left side of the left sludge cylinder piston 201 is discharged to the discharge manifold 400 installed on the left sludge cylinder 200 and the right sludge cylinder 300. Meanwhile, the left sludge cylinder four-way type low damping double-acting check valve 203 at the right end of the left sludge cylinder 200 has the left sludge cylinder four-way valve body discharge port valve core 299 moving downwards to press the left sludge cylinder four-way valve body discharge port valve core sealing gasket 21111 to close the discharge port, the left sludge cylinder four-way type low damping double-acting check valve 203 at the right end of the left sludge cylinder 200 has the left sludge cylinder four-way valve body feed port valve core 21212 moving upwards to separate from the left sludge cylinder four-way valve body feed port valve core sealing gasket 21313 to open the feed port, and the rod cavity at the right side of the left sludge cylinder piston 201 is sucked and installed in the left sludge cylinder 200 and the right sludge cylinder 300 to complete material storage in the feeding flow dividing pipe 500.

The right cavity of the double-outlet-rod double-acting hydraulic oil cylinder 100 is supplied with oil, the piston rod 102 of the double-outlet-rod double-acting hydraulic oil cylinder pulls the piston 301 of the right sludge cylinder to move leftwards, the right sludge cylinder four-way type low damping double-acting check valve 302 at the left end of the right sludge cylinder 300 has the right sludge cylinder four-way valve body feed port valve core 312 moving downwards to press the right sludge cylinder four-way valve body feed port valve core sealing gasket 313 tightly so as to close the feed port, the right sludge cylinder four-way type low damping double-acting one-way valve 302 at the left end of the right sludge cylinder 300 has the right sludge cylinder four-way valve body discharge port valve core 309 moving upwards to separate from the right sludge cylinder four-way valve body discharge port valve core sealing gasket 311 so as to open the discharge port, the material in the rod cavity on the left side of the right sludge cylinder piston 301 is discharged to the discharge manifold 400 installed on the left sludge cylinder 200 and the right sludge cylinder 300. Meanwhile, the right sludge cylinder three-way low-damping double-acting check valve 303 at the right end of the right sludge cylinder 300 has the right sludge cylinder three-way low-damping double-acting valve body discharge port valve core 399 moving downwards to press the right sludge cylinder three-way valve body discharge port valve core sealing gasket 31111 so as to close the discharge port, the right sludge cylinder 300 has the right sludge cylinder three-way low-damping double-acting check valve 303 has the right sludge cylinder three-way valve body feed port valve core 31212 moving upwards to separate from the right sludge cylinder three-way valve body feed port valve core sealing gasket 31313 so as to open the feed port, and the rodless cavity at the right side of the right sludge cylinder piston 301 is sucked into the materials in the feeding flow dividing pipe 500 arranged on the left sludge cylinder 200 and the right sludge cylinder 300 to finish storing.

The left cavity of the double-outlet-rod double-acting hydraulic oil cylinder 100 is supplied with oil, the piston rod 102 of the double-outlet-rod double-acting hydraulic oil cylinder pulls the piston 201 of the left sludge cylinder to move rightwards, the left sludge cylinder three-way low-damping double-acting check valve 202 at the left end of the left sludge cylinder 200 has the left sludge cylinder three-way valve body feed inlet valve core 212 moving upwards to separate from the left sludge cylinder three-way valve body feed inlet valve core sealing gasket 213 to open the feed inlet, the left sludge cylinder three-way low-damping double-acting one-way valve 202 at the left end of the left sludge cylinder 200 has the left sludge cylinder three-way valve body discharge port valve core 209 moving downwards to press the left sludge cylinder three-way valve body discharge port valve core sealing gasket 211 tightly so as to close the discharge port, the rodless cavity on the left side of the left sludge cylinder piston 201 sucks materials in the feeding shunt pipe 500 arranged on the left sludge cylinder 200 and the right sludge cylinder 300 to finish storing. Meanwhile, the left sludge cylinder four-way type low damping double-acting check valve 203 at the right end of the left sludge cylinder 200 has the left sludge cylinder four-way valve body discharge port spool 299 moving upwards to separate from the left sludge cylinder four-way valve body discharge port spool gasket 21111 so as to open the discharge port, the left sludge cylinder four-way type low damping double-acting check valve 203 at the right end of the left sludge cylinder 200 has the left sludge cylinder four-way valve body feed port spool 21212 moving downwards to compress the left sludge cylinder four-way valve body feed port spool gasket 21313 so as to close the feed port, and the material with the rod cavity at the right side of the left sludge cylinder piston 201 is discharged to the discharge collecting pipe 400 installed on the left sludge cylinder 200 and the right sludge cylinder 300.

The left cavity of the double-outlet-rod double-acting hydraulic oil cylinder 100 is supplied with oil, the piston rod 102 of the double-outlet-rod double-acting hydraulic oil cylinder pushes the piston 301 of the right sludge cylinder to move rightwards, the right sludge cylinder four-way type low damping double-acting check valve 302 at the left end of the right sludge cylinder 300 has the right sludge cylinder four-way valve body feed port valve core 312 moving upwards to separate from the right sludge cylinder four-way valve body feed port valve core sealing gasket 313 to open the feed port, the right sludge cylinder four-way type low damping double-acting one-way valve 302 at the left end of the right sludge cylinder 300 moves downwards, the right sludge cylinder four-way valve body discharge port valve core 309 presses the right sludge cylinder four-way valve body discharge port valve core sealing gasket 311 tightly so as to close the discharge port, the left rod cavity of the right sludge cylinder piston 301 is sucked and installed on the left sludge cylinder 200 and the right sludge cylinder 300, and the materials in the feeding shunt pipe 500 are stored. Meanwhile, the right sludge cylinder three-way low-damping double-acting check valve 303 at the right end of the right sludge cylinder 300 has the right sludge cylinder three-way valve body discharge port valve core 399 moving upwards to be separated from the right sludge cylinder three-way valve body discharge port valve core gasket 31111 to open the discharge port, the right sludge cylinder three-way low-damping double-acting check valve 303 at the right end of the right sludge cylinder 300 has the right sludge cylinder three-way valve body feed port valve core 31212 moving downwards to press the right sludge cylinder three-way valve body feed port valve core gasket 31313 to close the feed port, and the material in the rodless cavity at the right side of the right sludge cylinder piston 301 is discharged to the discharge collecting pipe 400 installed on the left sludge cylinder 200 and the right sludge cylinder 300.

Further, the left sludge cylinder piston 201 is installed at the left end of the double-rod double-acting hydraulic cylinder piston rod 102, and the right sludge cylinder piston 301 is installed at the right end of the double-rod double-acting hydraulic cylinder piston rod 102. Preferably, the left sludge cylinder piston 201 and the right sludge cylinder piston 301 are axially and radially fixed to the double-rod double-acting hydraulic cylinder piston rod 102 of the double-rod double-acting hydraulic cylinder 100 through the left sludge cylinder clamp key 207, the left sludge cylinder self-locking nut 206 is axially locked and sealed, the right sludge cylinder piston 301 is axially and radially fixed to the double-rod double-acting hydraulic cylinder piston rod 102 of the double-rod double-acting hydraulic cylinder 100 through the right sludge cylinder clamp key 307, and the right sludge cylinder self-locking nut 306 is axially locked and sealed. Preferably, in this preferred embodiment of the present invention, the left sludge cylinder piston 201 is sleeved on the positioning steps of the double-rod double-acting hydraulic cylinder piston rod 102 of the double-rod double-acting hydraulic cylinder 100, and is in clearance fit, and a sealing member is arranged in the middle for supporting and sealing, and a certain coaxiality deviation compensation is allowed; the left sludge cylinder clamping key 207 fixes the left sludge cylinder piston 201 at the positioning step of the double-rod double-acting hydraulic oil cylinder piston rod 102 in the axial and radial directions; the inner hole of the left sludge cylinder self-locking nut 206 is designed as a step blind hole, the inner hole step is sleeved on the excircle of the left sludge cylinder clamping key 207 to fix the left sludge cylinder clamping key 207, the inner hole is an internal thread and is screwed with an external thread of the double-rod double-acting hydraulic cylinder piston rod 102 to further fix the left sludge cylinder piston 201, and a sealing ring seal is arranged on the annular surface of the left sludge cylinder self-locking nut 206 and the left sludge cylinder piston 201, so that materials in a material cylinder cannot permeate into the joint of the left sludge cylinder piston 201 and the double-rod double-acting hydraulic cylinder piston rod 102 to pollute and corrode. Preferably, in this preferred embodiment of the present invention, the right sludge cylinder piston 301 is sleeved on the positioning steps of the double-rod double-acting hydraulic cylinder piston rod 102 of the double-rod double-acting hydraulic cylinder 100, and is in clearance fit, and a sealing member is arranged in the middle for supporting and sealing, and a certain coaxiality deviation compensation is allowed; the right sludge cylinder clamping key 307 fixes the right sludge cylinder piston 301 at the positioning step of the double-rod double-acting hydraulic oil cylinder piston rod 102 in the axial and radial directions; the inner hole of the right sludge cylinder self-locking nut 306 is designed as a step blind hole, the inner hole step is sleeved on the excircle of the right sludge cylinder clamping key 307 to fix the right sludge cylinder clamping key 307, the inner hole is an internal thread and is further fixed by screwing the external thread of the double-rod double-acting hydraulic cylinder piston rod 102, the right sludge cylinder self-locking nut 306 and the annular surface attached to the right sludge cylinder piston 301 are provided with sealing rings for sealing, so that materials in a charging barrel cannot permeate into the joint of the right sludge cylinder piston 301 and the double-rod double-acting hydraulic cylinder piston rod 102 to pollute and corrode.

Further, a left side mud jar work feed cylinder 204 cover has a left side mud jar outer protection section of thick bamboo 205, the both ends of a left side mud jar outer protection section of thick bamboo 205 are provided with the cooling opening, a left side mud jar work feed cylinder 204 with there is an annular cavity between a left side mud jar outer protection section of thick bamboo 205, a left side mud jar work feed cylinder 204 with the both ends of a left side mud jar outer protection section of thick bamboo 205 are provided with the sealing member for clearance fit and support and seal. It should be mentioned that, preferably, in this preferred embodiment of the present invention, the left sludge cylinder working barrel 204 and the left sludge cylinder piston 201 are in clearance fit, and the left sludge cylinder working barrel 204 made of different materials can be conveniently replaced according to different wear conditions or different material properties of the left sludge cylinder working barrel 204; the sealing element aging failure of the left sludge cylinder piston 201 is effectively delayed by taking away a large amount of heat energy generated by the back-and-forth movement friction between the left sludge cylinder working material cylinder 204 and the left sludge cylinder piston 201 during working. Simultaneously left side mud jar work feed cylinder 204 with the both ends clearance fit of the outer protection section of thick bamboo 205 of left side mud jar sets up the sealing member and supports and seal, makes left side mud jar work feed cylinder 204 suspend in on the mud jar piston 201 of a left side, can effectual compensation cylindricity error and the axiality error of assembly that left side mud jar work feed cylinder 204 processing caused can not cause the hole of mud jar work feed cylinder 204 of a left side with the eccentric wear phenomenon of mud jar piston 201 of a left side prolongs left side mud jar work feed cylinder 204 and mud jar piston 201 of a left side with the life of the sealing member of mud jar piston 201 of a left side.

Further, right mud jar work feed cylinder 304 cover has right mud jar external protection section of thick bamboo 305, the both ends of right mud jar external protection section of thick bamboo 305 are provided with the cooling opening, right mud jar work feed cylinder 304 with there is an annular cavity between the right mud jar external protection section of thick bamboo 305, right mud jar work feed cylinder 304 with the both ends of right mud jar external protection section of thick bamboo 305 are provided with the sealing member for clearance fit and support and seal. It should be noted that, preferably, in this preferred embodiment of the present invention, the right sludge cylinder working cylinder 304 and the right sludge cylinder piston 301 are in clearance fit, and the right sludge cylinder working cylinder 304 made of different materials can be conveniently replaced according to different wear conditions or different material properties of the right sludge cylinder working cylinder 304; the right sludge cylinder working material cylinder 304 and the right sludge cylinder piston 301 generate a large amount of heat energy through back and forth movement friction during working, so that the sealing element of the right sludge cylinder piston 301 is aged and loses efficacy at an accelerated speed, cooling ports are arranged at two ends of the right sludge cylinder outer protection cylinder 305, cooling media are introduced into the cooling ports, the large amount of heat energy generated through back and forth movement friction during working between the right sludge cylinder working material cylinder 304 and the right sludge cylinder piston 301 is taken away, and the aging and losing efficacy of the sealing element of the right sludge cylinder piston 301 are effectively delayed. Simultaneously right side mud jar work feed cylinder 304 with right side mud jar outer protection section of thick bamboo 305 both ends clearance fit sets up the sealing member and supports and seal, makes right side mud jar work feed cylinder 304 suspend in on the mud jar piston 301 of the right side, can effectual compensation cylindricity error that right side mud jar work feed cylinder 304 processing caused and the axiality error of assembly can not cause right side mud jar work feed cylinder 304 the hole with right side mud jar piston 301's eccentric wear phenomenon, extension right side mud jar work feed cylinder 304 and right side mud jar piston 301 with the life of right side mud jar piston 301's sealing member.

It is worth mentioning that the double-cylinder double-feed hydraulic piston pump further comprises a stroke adjusting reversing device, and the stroke adjusting reversing device is installed between the left sludge cylinder 200 and the right sludge cylinder 300. Specifically, the stroke adjustment and reversing device comprises a first sealing guide sleeve 104, a first position sensor 105, a reversing valve rod 106, a position detection sensor 108, a second position sensor 109 and a second sealing guide sleeve 110. More specifically, the first sealing guide sleeve 104 and the position sensor 105 are installed on the left sludge cylinder four-way low damping double-acting check valve 203 at the right end of the left sludge cylinder 200, the second sealing guide sleeve 110 and the second position sensor 109 are installed on the right sludge cylinder four-way low damping double-acting check valve 302 at the left end of the right sludge cylinder 300, the reversing valve rod 106 is installed in the sealing guide sleeve holes of the first sealing guide sleeve 104 and the second sealing guide sleeve 110, and the position detection sensor 108 is installed on the reversing valve rod 106.

It should be noted that the effective strokes at the two ends of the double-rod double-acting hydraulic cylinder 100 can be adjusted by adjusting the installation positions of the first position sensor 105 and the second position sensor 109, so that when the double-rod double-acting hydraulic cylinder 100 moves back and forth at a high speed, the left sludge cylinder piston 201 and the right sludge cylinder piston 301 cannot contact the sealing end covers at the two ends of the sludge cylinder, and cylinder collision caused by large movement inertia is avoided.

More specifically, in this preferred embodiment of the present invention, the effective stroke of the left end of the dual-out rod, dual-acting hydraulic ram 100 is adjusted by adjusting the mounting position of the first position sensor 105 mounted on the left sludge cylinder four-way low damping, dual-acting check valve body 288. The effective stroke of the right end of the double-rod double-acting hydraulic oil cylinder 100 is adjusted by adjusting the mounting position of the second position sensor 109 mounted on the right sludge cylinder four-way type low-damping double-acting check valve 302, so that when the double-rod double-acting hydraulic oil cylinder 100 moves back and forth at a high speed, the piston of the piston rod 102 of the double-rod double-acting hydraulic oil cylinder cannot contact the first guide sleeve 103 and the second guide sleeve 107, and cylinder collision caused by large movement inertia is avoided.

And oil is supplied to the right cavity of the double-rod double-acting hydraulic oil cylinder 100, the piston rod 102 of the double-rod double-acting hydraulic oil cylinder pulls the right sludge cylinder piston 301 leftwards to move, and the right sludge cylinder piston 301 pushes the reversing valve rod 106 arranged in the holes of the first sealing guide sleeve 104 and the second sealing guide sleeve 110 to move leftwards. When the position detection sensor 108 mounted on the reversing valve rod 106 is close to the first position sensor 105 mounted on the left sludge cylinder four-way valve body 288, the first position sensor 105 sends a signal to a hydraulic system to reverse the reversing valve, so as to supply oil to the left cavity of the double-rod double-acting hydraulic oil cylinder 100. The piston rod 102 of the double-rod double-acting hydraulic oil cylinder pulls the left sludge cylinder piston 201 rightwards to move, and the left sludge cylinder piston 201 pushes the reversing valve rod 106 arranged in the holes of the first sealing guide sleeve 104 and the second sealing guide sleeve 110 to move rightwards. When the position detection sensor 108 mounted on the reversing valve rod 106 is close to the second position sensor 109 mounted on the right sludge cylinder four-way type low-damping double-acting check valve 302, the second position sensor 109 sends a signal to a hydraulic system to reverse the reversing valve, so as to supply oil to the right cavity of the double-rod double-acting hydraulic cylinder 100, and the operation is cycled periodically.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A double-cylinder double-feeding hydraulic piston pump is characterized by comprising a double-rod double-acting hydraulic oil cylinder and two sludge cylinders, wherein the two sludge cylinders are respectively arranged at two ends of the double-rod double-acting hydraulic oil cylinder, the double-rod double-acting hydraulic oil cylinder is provided with a double-rod double-acting hydraulic oil cylinder piston rod, the two sludge cylinders are respectively provided with sludge cylinder pistons, each sludge cylinder piston of the two sludge cylinders is respectively arranged at two ends of the double-rod double-acting hydraulic oil cylinder piston rod, the double-rod double-acting hydraulic oil cylinder piston rod drives the sludge cylinder pistons of the two sludge cylinders at two ends to move back and forth, an upper discharge port one-way valve and a lower feed port one-way valve which are arranged at two ends of the two sludge cylinders are alternately opened and closed to complete feeding and discharging, and the materials are pumped by reciprocating movement in such a way, the upper discharge port one-way valve and the lower feed port one-way valve are both in a straight-through structure;

the double-cylinder double-feeding hydraulic piston pump further comprises a stroke adjusting reversing device, and the stroke adjusting reversing device is arranged between the two sludge cylinders; the stroke adjusting and reversing device comprises a first sealing guide sleeve, a first position sensor, a reversing valve rod, a position detection sensor, a second position sensor and a second sealing guide sleeve, wherein the first sealing guide sleeve and the first position sensor are arranged at the end part of one sludge cylinder, the second position sensor and the second sealing guide sleeve are arranged at the end part of the other sludge cylinder, the reversing valve rod is arranged in a sealing guide sleeve hole of the first sealing guide sleeve and the second sealing guide sleeve, and the position detection sensor is arranged on the reversing valve rod; the effective strokes of the two ends of the double-rod double-acting hydraulic oil cylinder can be adjusted by adjusting the mounting positions of the first position sensor and the second position sensor;

each sludge cylinder also comprises a sludge cylinder working material cylinder and a sludge cylinder external protection cylinder, wherein the sludge cylinder working material cylinder is sleeved in the sludge cylinder external protection cylinder;

the two ends of the sludge cylinder working material cylinder and the outer protection cylinder are in clearance fit, are provided with sealing pieces for supporting and sealing, and the sludge cylinder working material cylinder is suspended on the sludge cylinder piston;

the sludge cylinder piston is matched in the inner hole of the sludge cylinder working material cylinder in a sliding and sealing manner, the sludge cylinder outer protection cylinder is sleeved on the excircle of the sludge cylinder working material cylinder, and an annular cavity is formed between the excircle of the sludge cylinder working material cylinder and two ends of the inner hole of the sludge cylinder outer protection cylinder; the sludge cylinder working material barrel and the sludge cylinder piston are in clearance fit, and the sludge cylinder working material barrel made of different materials can be conveniently replaced according to different abrasion conditions or material properties of the sludge cylinder working material barrel;

the double-cylinder double-feeding hydraulic piston pump is characterized in that two ends of at least one sludge cylinder are provided with a three-way low-damping double-acting check valve and a four-way low-damping double-acting check valve, so that when piston rods of the double-rod double-acting hydraulic oil cylinders drive sludge cylinder pistons at two ends to move back and forth by the aid of return power, the three-way low-damping double-acting check valve at two ends of each sludge cylinder and the upper discharge port check valve and the lower feed port check valve of the four-way low-damping double-acting check valve are alternately opened and closed to complete feeding and discharging; the three-way low-damping double-acting one-way valve is of an integrated structure and has the functions of one-way check of upper discharging and one-way check of lower feeding; the four-way low-damping double-acting one-way valve is of an integrated structure and has the functions of one-way non-return of upper discharging and one-way non-return of lower feeding;

the double-cylinder double-feeding hydraulic piston pump also comprises a discharging collecting pipe and a feeding flow dividing pipe; the three-way low-damping double-acting one-way valve comprises a sludge cylinder three-way valve body, wherein the upper and lower ports of the sludge cylinder three-way valve body are respectively connected with the discharging collecting pipe and the feeding flow dividing pipe through flanges, and the middle port of the sludge cylinder three-way valve body is connected with the sludge cylinder working material barrel; the four-way low-damping double-acting check valve comprises a sludge cylinder four-way valve body, wherein the upper and lower ports of the sludge cylinder four-way valve body are respectively connected with the discharging collecting pipe and the feeding flow dividing pipe through flanges, the middle port is connected with the sludge cylinder working material barrel, and the other middle port is fixedly connected with the double-outlet-rod double-acting hydraulic cylinder through a flange;

the middle port of the sludge cylinder three-way valve body of the three-way low-damping double-acting one-way valve is connected with the sludge cylinder outer protection cylinder at one end of the rodless cavity of the sludge cylinder working material cylinder and is used as a rodless cavity end cover of the sludge cylinder working material cylinder; the middle opening of the four-way valve body of the sludge cylinder of the four-way low-damping double-acting one-way valve is connected with the sludge cylinder outer protection cylinder at one end of the rod cavity of the sludge cylinder working material cylinder through a flange and is used as the rod cavity end cover of the sludge cylinder working material cylinder;

each sludge cylinder also comprises a sludge cylinder self-locking nut and a sludge cylinder clamp key, wherein the sludge cylinder piston is assembled at the end part of the piston rod of the double-outlet-rod double-acting hydraulic cylinder;

the piston of the sludge cylinder is sleeved on the positioning steps of the piston rods of the double-outlet-rod double-acting hydraulic oil cylinder, the piston rods are in clearance fit, and a sealing element is arranged in the middle for supporting and sealing; the sludge cylinder clamping key fixes the sludge cylinder piston at the positioning step of the double-outlet-rod double-acting hydraulic oil cylinder piston rod in the axial and radial directions; the inner hole of the sludge cylinder self-locking nut is designed as a step blind hole, the inner hole step is sleeved on the excircle of the sludge cylinder clamping key to fix the sludge cylinder clamping key, the inner hole is an internal thread, the external thread of the piston rod of the double-rod double-acting hydraulic oil cylinder is screwed to further fix the sludge cylinder piston, the sludge cylinder self-locking nut and the annular surface attached to the sludge cylinder piston are provided with sealing rings for sealing, so that materials in a material cylinder cannot permeate into the joint of the sludge cylinder piston and the piston rod of the double-rod double-acting hydraulic oil cylinder to pollute and corrode.

2. The dual-cylinder dual-feed hydraulic piston pump of claim 1, wherein the dual-outlet-rod dual-acting hydraulic cylinder further comprises a cylinder barrel, a cylinder barrel flange, a buffer plunger, a first guide sleeve and a second guide sleeve, wherein the dual-outlet-rod dual-acting hydraulic cylinder piston rod and the buffer plunger are assembled in the cylinder barrel, the first guide sleeve is installed at one end of the cylinder barrel, the second guide sleeve is installed at the other end of the cylinder barrel, a piston of the dual-outlet-rod dual-acting hydraulic cylinder piston rod is in sliding sealing fit with an inner hole of the cylinder barrel, and a piston rod of the dual-outlet-rod dual-acting hydraulic cylinder piston rod is in sliding sealing fit with inner holes of the first guide sleeve and the second guide sleeve.

3. The double-cylinder double-feed hydraulic piston pump as claimed in claim 1, wherein the outer circle positioning step of the end of the sludge cylinder three-way valve body is provided with a sealing member and is installed in the inner hole of the end of the sludge cylinder working material cylinder for static sealing, wherein the sludge cylinder three-way valve body is connected with the end of the sludge cylinder outer protection cylinder.

4. The double-cylinder double-feed hydraulic piston pump as claimed in claim 1, wherein the outer circle positioning step at one end of the sludge cylinder four-way valve body is provided with a sealing member and is installed in the inner hole of the end part of the sludge cylinder working material cylinder for static sealing, the sludge cylinder four-way valve body is connected with the end part of the sludge cylinder outer protection cylinder, and the inner hole at the other end of the sludge cylinder four-way valve body is provided with a sealing device and is in sliding sealing with the piston rod of the double-rod double-acting hydraulic oil cylinder extending into the hole of the sealing device.

5. The double-cylinder double-feed hydraulic piston pump as claimed in claim 1, wherein the three-way low-damping double-acting check valve further comprises a sludge cylinder three-way valve body discharge port valve core, a sludge cylinder three-way valve body discharge port valve core seat, a sludge cylinder three-way valve body discharge port valve core gasket, a sludge cylinder three-way valve body feed port valve core and a sludge cylinder three-way valve body feed port valve core gasket, wherein the sludge cylinder three-way valve body discharge port valve core seat is installed in an upper port inner hole of the sludge cylinder three-way valve body, the sludge cylinder three-way valve body discharge port valve core is installed in a sliding fit in an inner hole of the sludge cylinder three-way valve body discharge port valve core seat, the sludge cylinder three-way valve body discharge port valve core gasket is installed on an inner hole step of the sludge cylinder three-way valve body below the sludge cylinder three-way valve body discharge port valve core, wherein the sludge cylinder three-way valve body feed port valve core is installed in a sliding fit in a valve core seat inner hole on an upper portion of the sludge cylinder three-way valve body feed port, the sealing gasket of the feed port valve core of the sludge cylinder three-way valve body is arranged on the step of the inner hole of the sludge cylinder three-way valve body below the feed port valve core of the sludge cylinder three-way valve body.

6. The dual-cylinder dual-feed hydraulic piston pump as claimed in claim 1, wherein the four-way low-damping double-acting check valve further comprises a sludge cylinder four-way valve body discharge port valve core, a sludge cylinder four-way valve body discharge port valve core seat, a sludge cylinder four-way valve body discharge port valve core sealing gasket, a sludge cylinder four-way valve body feed port valve core and a sludge cylinder four-way valve body feed port valve core sealing gasket, wherein the sludge cylinder four-way valve body discharge port valve core seat is installed in an upper opening inner hole of the sludge cylinder four-way valve body, the sludge cylinder four-way valve body discharge port valve core is installed in a sliding fit manner in an inner hole of the sludge cylinder four-way valve body discharge port valve core seat, the sludge cylinder four-way valve body discharge port valve core sealing gasket is installed on an inner hole step of the sludge cylinder four-way valve body discharge port valve body below the sludge cylinder four-way valve body discharge port valve core, and the sludge cylinder four-way valve body feed port valve core is installed in a sliding fit manner in an inner hole of the valve core seat at the upper portion of the sludge cylinder four-way valve body feed port In the device, a sealing gasket of a feed port valve core of the sludge cylinder four-way valve body is arranged on an inner hole step of the sludge cylinder four-way valve body below the feed port valve core of the sludge cylinder four-way valve body.