A pure liquid driven piston grouting pump

Abstract

The present invention discloses a pure liquid-driven piston grouting pump, comprising a base, a frame, a pump body assembly, and a hydraulic oil power component; the pump body assembly is arranged on the base through the frame, and the pump body assembly comprises an oil cylinder, two slurry cylinders and a lubricating mechanism, the two slurry cylinders are respectively connected to the two ends of the oil cylinder, and the outer ends of the two slurry cylinders are respectively connected to a slurry suction and discharge valve assembly; the lubricating mechanism realizes liquid-driven automatic lubrication and synchronous lubrication with the oil cylinder, and compared with manual lubrication, the lubrication position is more accurate and no additional power is required; when the slurry cylinder seal needs to be replaced, only operation is required at the water tank port to complete the replacement of the piston seal, and the remaining parts do not need to be disassembled; at the same time, when in use, the water tank needs to be filled with clean water, which can be used as cooling water for the plunger or the piston, and also has the function of lubricating the inner wall of the slurry cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of grouting pumps, and in particular to a pure liquid-driven piston grouting pump. Background Art

[0002] Mining grouting pumps are commonly used mining engineering equipment, used in underground mines or other excavation projects to reinforce rocks by injecting cement slurry or other solidifying materials.

[0003] The common lubrication devices in the current grouting pumps on the market are mostly hand-cranked grease pumps or electric grease pumps, which have the disadvantages of inaccurate lubrication position and the need for manual operation. In addition, a connection box is often set between the oil cylinder and the piston of the hydraulic grouting pump, in which the oil cylinder piston rod and the slurry cylinder piston rod are connected by a connector. There are multiple seals in the slurry cylinder piston component. When the seals are aged and leak and need to be replaced, it is often necessary to disassemble the entire connection box and the various connectors therein at the same time. The disassembly process is cumbersome and difficult, resulting in high equipment maintenance costs. Summary of the invention

[0004] The purpose of the present invention is to provide a pure liquid driven piston grouting pump in view of the deficiencies in the prior art.

[0005] The technical solution of the present invention to solve the above problems is: a pure liquid driven piston grouting pump, comprising a base, a frame, a pump body assembly, and a hydraulic oil power component;

[0006] The pump body assembly is arranged on the base through a frame, and the pump body assembly includes an oil cylinder, two slurry cylinders and a lubrication mechanism, the two slurry cylinders are respectively connected to the two ends of the oil cylinder, and the outer ends of the two slurry cylinders are respectively connected to a slurry suction and discharge valve assembly;

[0007] A cylinder piston assembly is slidably disposed inside the oil cylinder, and the cylinder piston assembly includes a cylinder piston body and two first piston rods, the two first piston rods are respectively fixedly connected to the two sides of the cylinder piston body, a slurry piston body is slidably disposed inside the slurry cylinder, a second piston rod is disposed inside the slurry piston body, and the first piston rod is connected to the second piston rod;

[0008] The lubrication mechanism includes a grease box and a grease pump. The grease pump includes a housing and a grease piston assembly. A piston cavity and suction and discharge cavities on both sides are provided in the housing. The two sides of the piston cavity are respectively connected to the suction and discharge cavities. The inner diameter of the suction and discharge cavities is smaller than the piston cavity. The grease piston assembly includes a grease piston body and a grease piston rod connected to both sides of the grease piston body. The outer ends of the grease piston rods on both sides are respectively fixedly connected to the suction and discharge piston bodies. The suction and discharge piston body can be slidably arranged in the suction and discharge cavity. The grease piston body divides the piston cavity into a first liquid drive cavity and a second liquid drive cavity. A first liquid drive oil inlet and a first liquid drive oil inlet are provided on the outer wall of the housing. Two liquid drive oil inlets, the first liquid drive oil inlet is communicated with the first liquid drive cavity, the second liquid drive oil inlet is communicated with the second liquid drive cavity, the suction and discharge cavities on both sides are respectively provided with an oil suction port and an oil outlet, the oil suction port is connected to the grease box through an oil suction pipe, the oil outlet is connected to the oil outlet pipe, and the oil suction pipe and the oil outlet pipe are respectively provided with a first non-return valve; a liquid control port is respectively provided at the stroke end points on both sides of the oil cylinder, the two liquid control ports are respectively connected to the first liquid drive oil inlet and the second liquid drive oil inlet through pipes, and a lubrication port is respectively provided at the inner end stroke end point of the slurry cylinder, and the two lubrication ports are respectively connected to the oil outlets on both sides through oil outlet pipes.

[0009] Furthermore, a water tank is provided at the connection between the oil cylinder and the slurry cylinder, the outer side of the water tank is sealedly connected to the slurry cylinder, the inner side of the water tank is sealedly connected to the oil cylinder, and a detachable cover is provided on the top of the water tank, and the cover is sealedly connected to the water tank.

[0010] Furthermore, the first piston rod and the second piston rod are connected by a connecting assembly, which includes a piston connecting shaft and two groups of fixed sleeves. The outer end of the first piston rod, the inner end of the second piston rod and both ends of the piston connecting shaft are respectively fixed with piston connecting flanges. The inner end of the piston connecting shaft and the first piston rod are connected by a group of fixed sleeves, and the outer end of the piston connecting shaft and the second piston rod are connected by a group of fixed sleeves.

[0011] Furthermore, the fixed sleeve includes a first half ring and a second half ring, the upper and lower ends of the first half ring and the second half ring are fixedly connected by a bolt respectively, the first half ring and the second half ring are connected by four groups of bolts to form an annular assembly, and a clamping groove for clamping two piston connecting flanges is provided in the annular assembly, the groove walls on both sides of the clamping groove are trapezoidal structures, and the gap between the first half ring and the second half ring is adjustable.

[0012] Furthermore, the slurry piston body includes a right pressure cover, a rubber seal, a piston body, a guide ring and a left pressure cover from the outside to the inside. The right pressure cover, the piston body and the left pressure cover are connected by multiple sets of bolts. The rubber seal is arranged between the right pressure cover and the piston body, and the guide ring is arranged between the piston body and the left pressure cover.

[0013] Furthermore, a hydraulic oil port is provided at each end of the oil cylinder, and the hydraulic oil ports at both ends are connected to the hydraulic oil power assembly through a reversing mechanism;

[0014] The reversing mechanism includes a hydraulically controlled stroke valve, which includes a valve body, a valve core and an end cover. A piston valve core is horizontally movably provided in the oil inlet chamber of the end cover. A sealing assembly between the piston valve core and the oil inlet chamber is fixedly arranged on the inner wall of the oil inlet chamber. The sealing assembly includes a sealing member and two O-rings from the outside to the inside. A first mounting groove for installing the sealing member and two second mounting grooves for installing the O-rings are provided on the inner wall of the oil inlet chamber. The sealing member is arranged in the first mounting groove, and the two O-rings are respectively arranged in the two second mounting grooves. The inner walls of the sealing member and the two O-rings are both fitted with the piston valve core, and the inner diameter of the oil inlet chamber is equal to the diameter of the piston valve core.

[0015] Furthermore, a cooling mechanism is provided on the hydraulic oil tank of the hydraulic oil power assembly.

[0016] Furthermore, the cooling mechanism includes a cooling box, a water inlet pipe, a water outlet pipe, an oil inlet pipe and an oil outlet pipe. The cooling box is provided with a plurality of partitions, and the plurality of partitions divide the cooling box into a plurality of water chambers and oil chambers. The plurality of water chambers and oil chambers are arranged at staggered intervals. The outer ends of the water inlet pipe, the water outlet pipe, the oil inlet pipe and the oil outlet pipe are arranged outside the cooling box, and the inner ends are arranged inside the cooling box through the side wall of the cooling box and the plurality of partitions, and the inner ends are closed. The side walls of the water inlet pipe and the water outlet pipe in each water chamber are respectively provided with a water inlet hole and a water outlet hole, and the side walls of the oil inlet pipe and the oil outlet pipe in each oil chamber are respectively provided with an oil inlet hole and an oil outlet hole. The outer ends of the oil inlet pipe and the oil outlet pipe are connected to the hydraulic oil tank through a pipeline, and a pump body is provided on the pipeline connecting the oil inlet pipe and the hydraulic oil tank. The water inlet pipe and the water outlet pipe are connected to cooling water through a pipeline, and a pump body is provided on the pipeline connecting the water inlet pipe and the cooling water.

[0017] Furthermore, the pipeline connecting the oil inlet pipe and the hydraulic oil tank includes a hard pipe and a high-pressure hose. The hard pipe is fixed to the frame by a heavy-duty pipe clamp, and then the hard pipe is connected to the hydraulic oil pipeline by the high-pressure hose.

[0018] Furthermore, the hard pipe is connected to the hydraulic oil tank through an overflow pipe, and a second one-way valve of 0.5 MPa is provided on the overflow pipe.

[0019] The present invention has the beneficial effects:

[0020] The present invention provides a pure liquid-driven piston grouting pump, in which a lubrication mechanism realizes liquid-driven automatic lubrication and lubricates synchronously with the oil cylinder. Compared with manual lubrication, the lubrication position is more precise and no additional electricity is required. When the slurry cylinder seal needs to be replaced, only operation is required at the water tank port to complete the replacement of the piston seal, and there is no need to disassemble the remaining parts. At the same time, when in use, the water tank needs to be filled with clean water, which can be used as cooling water for the piston and also has the function of lubricating the inner wall of the slurry cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the present invention;

[0022] Figure 2 A top view of the present invention;

[0023] Figure 3 is a side view of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the lubrication mechanism;

[0025] Figure 5 It is a structural schematic diagram of the pump assembly;

[0026] Figure 6 is a flow chart for dismantling a connection assembly, (a) is the first step, (b) is the second step, (c) is the third step, (d) is the fourth step, (e) is the fifth step, (f) is the sixth step, and (g) is the seventh step;

[0027] Figure 7 (a) is a stereoscopic view of the slurry piston body; (b) is a schematic diagram of the explosion of the slurry piston body;

[0028] Figure 8 A three-dimensional diagram of a fixed ferrule;

[0029] Fig. 9 A schematic diagram of the structure of the card slot for fixing the card sleeve;

[0030] Fig.10 It is a schematic diagram of the internal structure of the hydraulically controlled stroke valve;

[0031] Fig.11 is a schematic diagram of the structure of the cooling mechanism;

[0032] Fig.12 This is a schematic diagram of the structure of the pipeline connecting the oil inlet pipe and the hydraulic oil tank.

[0033] In the figure: 1-base, 2-frame, 3-pump assembly, 4-hydraulic oil power assembly, 5-connection assembly, 7-hydraulic stroke valve, 8-cooling mechanism;

[0034] 301-oil cylinder, 302-slurry cylinder, 303-water tank, 304-oil cylinder piston body, 305-first piston rod, 306-second piston rod, 307-slurry piston body, 308-slurry suction and discharge valve assembly, 309-grease box, 310-grease pump, 311-housing, 312-piston cavity, 313-suction and discharge cavity, 314-grease piston body, 315-grease piston rod, 316-suction and discharge piston body, 317-first liquid drive cavity, 318-second liquid drive cavity, 319-first liquid drive oil inlet, 320-second liquid drive oil inlet, 321-suction port, 322-oil outlet, 323-oil suction pipeline, 324-oil outlet pipeline, 325-first one-way valve, 326-hydraulic control port, 327-lubrication port, 328-cover plate, 329-hydraulic oil port;

[0035] 501-piston connecting shaft, 502-fixing sleeve, 503-piston connecting flange, 504-first half ring, 505-second half ring, 506-clamping groove;

[0036] 601-right gland, 602-rubber seal, 603-piston body, 604-guide ring, 605-left gland;

[0037] 701-valve body, 702-valve core, 703-end cover, 704-seal, 705-O-ring, 706-first installation groove, 707-second installation groove, 708-piston valve core;

[0038] 801-cooling box, 802-water inlet pipe, 803-water outlet pipe, 804-oil inlet pipe, 805-oil outlet pipe, 806-partition, 807-water chamber, 808-oil chamber, 809-hard pipe, 810-high-pressure hose, 811-heavy-duty pipe clamp, 812-overflow pipe, 813-second one-way valve. DETAILED DESCRIPTION

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0040] like Figure 1-3 As shown, a pure liquid-driven piston grouting pump includes a base 1, a frame 2, a pump body assembly 3, and a hydraulic oil power component 4;

[0041] The hydraulic oil power component 4 provides hydraulic oil to the pump body assembly 3 .

[0042] The pump body assembly 3 is arranged on the base 1 through the frame 2, and the pump body assembly 3 includes an oil cylinder 301, two slurry cylinders 302 and a lubrication mechanism. The two ends of the oil cylinder 301 are respectively connected to a slurry cylinder 302 through a water tank 303. The oil cylinder 301 is slidably provided with an oil cylinder 301 piston assembly. The oil cylinder 301 piston assembly includes an oil cylinder piston body 304 and two first piston rods 305. The two first piston rods 305 are respectively fixedly connected to the two sides of the oil cylinder piston body 304. A slurry piston body 307 is slidably provided in the slurry cylinder 302, and a second piston rod 306 is provided on the inner side of the slurry piston body 307. The first piston rod 305 and the second piston rod 306 are connected by a connecting assembly 5.

[0043] The outer ends of the two slurry cylinders 302 are respectively connected to a slurry suction and discharge valve assembly 308. The slurry suction and discharge valve assembly 308 can be seen in the patent application CN202410452072.3, which has described the slurry suction and discharge valve assembly 308 in detail.

[0044] like Figure 4 As shown, the lubrication mechanism includes a grease box 309 and a grease box 310. The grease box 310 includes a grease box 311 and a grease piston assembly. The grease box 311 is provided with a piston cavity 312 and suction and discharge cavities 313 on both sides. The two sides of the piston cavity 312 are respectively connected to the suction and discharge cavities 313. The inner diameter of the suction and discharge cavity 313 is smaller than that of the piston cavity 312. The grease piston assembly includes a grease piston body 314 and a grease piston rod 315 connected to the two sides of the grease piston body 314. The outer ends of the grease piston rods 315 on both sides are respectively fixedly connected to the suction and discharge piston bodies 316. The suction and discharge piston bodies 316 can be slidably arranged in the suction and discharge cavity 313. The grease piston body 314 divides the piston cavity 312 into a first liquid drive cavity 317 and a second liquid drive cavity 318. The outer wall of the grease box 311 is provided with a first liquid drive oil inlet 319 and a second liquid drive oil inlet 320. The first liquid drive oil inlet 319 is communicated with the first liquid drive cavity 317, and the second liquid drive oil inlet 320 is communicated with the second liquid drive cavity 318. The suction and discharge cavities 313 on both sides are respectively provided with an oil suction port 321 and an oil outlet 322. The oil suction port 321 is connected to the grease box 309 through an oil suction pipe 323, and the oil outlet 322 is connected to the oil suction pipe 324. The oil suction pipe 323 and the oil suction pipe 324 are respectively provided with a first non-return valve 325.

[0045] The stroke endpoints on both sides of the oil cylinder 301 are respectively provided with a hydraulic control port 326, and the two hydraulic control ports 326 are respectively connected to the first liquid drive oil inlet 319 and the second liquid drive oil inlet 320 through pipelines. The inner stroke endpoint of the slurry cylinder 302 is respectively provided with a lubrication port 327, and the two lubrication ports 327 are respectively connected to the oil outlets 322 on both sides through the oil suction pipeline 324. As shown in the figure, the oil cylinder piston body 304 in the oil cylinder 301 moves to the left stroke endpoint, and the hydraulic oil is pumped into the first liquid drive cavity 317 from the hydraulic control port 326 there, and the right suction and discharge piston body 316 in the grease box 310 moves to the right, and the grease box 310 in the suction and discharge cavity 313 is discharged. At this time, the slurry piston body 307 in the right slurry cylinder 302 is at the inner stroke endpoint, and the pumped grease enters from the lubrication port 327 to lubricate the slurry piston body 307, realizing automatic lubrication.

[0046] like Figure 5 As shown, the outer side of the water tank 303 is sealed with the slurry cylinder 302 , the inner side of the water tank 303 is sealed with the oil cylinder 301 , and a detachable cover plate 328 is provided on the top of the water tank 303 , and the cover plate 328 is sealed with the water tank 303 .

[0047] like Figure 6 , 8 As shown in Figure 9, the first piston rod 305 and the second piston rod 306 are connected by a connecting assembly 5, and the connecting assembly 5 includes a piston connecting shaft 501 and two groups of fixed sleeves 502. The inner end of the piston connecting shaft 501 is connected to the first piston rod 305 by a group of fixed sleeves 502, and the outer end of the piston connecting shaft 501 is connected to the second piston rod 306 by a group of fixed sleeves 502. The outer end of the first piston rod 305, the inner end of the second piston rod 306 and the two ends of the piston connecting shaft 501 are respectively fixed with piston connecting flanges 503. The fixed sleeve 502 includes a first half ring 504 and a second half ring 505. The upper and lower ends of the first half ring 504 and the second half ring 505 are The two sides are fixedly connected by a bolt respectively, and the first half ring 504 and the second half ring 505 are connected by four groups of bolts to form an annular component, and a clamping groove 506 for clamping the two piston connecting flanges 503 is provided in the annular component, and the groove walls on both sides of the clamping groove 506 are trapezoidal structures, that is, the groove width of the clamping groove 506 gradually decreases from the inside to the outside, and the trapezoidal groove wall of the clamping groove 506 is used to squeeze the end face of one end of the piston connecting flange 503 to ensure that the two parts are concentric, and the gap between the first half ring 504 and the second half ring 505 is adjustable. The smaller the gap between the first half ring 504 and the second half ring 505 connected by bolts, the greater the pre-tightening force applied to the two piston connecting flanges 503, thereby achieving a tighter fixed connection.

[0048] When it is necessary to repair or replace the slurry piston body 307 of the slurry cylinder 302, Figure 6As shown in (a), the first step is to open the cover plate 328 of the water tank 303 and remove the two sets of fixing sleeves 502. Figure 6 As shown in (b), in the second step, the first piston rod 305 is adjusted to the right, and the piston connecting shaft 501 automatically falls off, and the piston connecting shaft 501 is taken out. Figure 6 As shown in (c), in the third step, the first piston rod 305 is adjusted to the left, as shown in FIG. Figure 6 As shown in (d), the fourth step is to wait until the first piston rod 305 and the second piston rod 306 lightly contact each other. Figure 6 As shown in (e), in the fifth step, the piston connecting flange 503 at the outer end of the first piston rod 305 and the inner end of the second piston rod 306 are connected through a set of fixing sleeves 502, such as Figure 6 As shown in (f), in the sixth step, the first piston rod 305 is adjusted to the right, and the slurry piston body 307 can be pulled to the right into the water tank 303, as shown in FIG. Figure 6 As shown in (g), in the seventh step, when the slurry piston body 307 is completely exposed in the water tank 303, the fixing sleeve 502 is removed. Because the second piston rod 306 is shorter, the fixing sleeve 502 is not moved into the oil cylinder 301 when the slurry piston body 307 is exposed. After the fixing sleeve 502 is removed, the slurry piston body 307 can be taken out for replacement and maintenance.

[0049] In one embodiment, Figure 7 As shown in (a) and (b), the slurry piston body 307 includes a right gland 601, a rubber seal 602, a piston body 603, a guide ring 604 and a left gland 605 from outside to inside, the right gland 601, the piston body 603 and the left gland 605 are connected by multiple sets of bolts, the rubber seal 602 is arranged between the right gland 601 and the piston body 603, and the guide ring 604 is arranged between the piston body 603 and the left gland 605. The guide ring 604 has the functions of supporting the piston, reducing the eccentricity of the piston, and reducing the wear of the piston seal 704.

[0050] The two ends of the oil cylinder 301 are respectively provided with a hydraulic oil port 329 , and the hydraulic oil ports 329 at the two ends are connected to the hydraulic oil power assembly 4 through a reversing mechanism.

[0051] like Fig.10As shown, in one embodiment, the reversing mechanism includes a hydraulically controlled stroke valve 7, which includes a valve body 701, a valve core 702 and an end cover 703. The structures of the valve body 701, the valve core 702 and the end cover 703 are shown in the patent CN202223525384.8 that has been applied for. A piston valve core 708 is horizontally movable in the oil inlet chamber of the end cover 703. The improvement is that a sealing assembly between the piston valve core 708 and the oil inlet chamber is fixedly arranged on the inner wall of the oil inlet chamber. The sealing assembly includes a sealing member 704 and two O-rings 705 from the outside to the inside. A first mounting member for mounting the sealing member 704 is provided on the inner wall of the oil inlet chamber. Groove 706, two second mounting grooves 707 for installing O-rings 705, the seal 704 is arranged in the first mounting groove 706, and the two O-rings 705 are respectively arranged in the two second mounting grooves 707, the inner walls of the seal 704 and the two O-rings 705 are both fitted with the piston valve core 708, and the inner diameter of the oil inlet chamber is equal to the diameter of the piston valve core 708. Compared with the applied patent 202223525384.8, the sealing structure in the present invention has lower requirements on the processing accuracy of the stroke valve push rod, has better sealing performance, is not prone to leakage, and avoids the problem of equipment reversing failure caused by the leakage of hydraulic oil resulting in the plunger push rod not moving in place.

[0052] In one embodiment, Fig.11 , 12As shown, a cooling mechanism 8 is provided on the hydraulic oil tank of the hydraulic oil power assembly 4, and the cooling mechanism 8 is used to cool the hydraulic oil. The cooling mechanism 8 includes a cooling box 801, a water inlet pipe 802, a water outlet pipe 803, an oil inlet pipe 804 and an oil outlet pipe 805. A plurality of partitions 806 are provided in the cooling box 801, and the plurality of partitions 806 divide the cooling box 801 into a plurality of water chambers 807 and an oil chamber 808. The plurality of water chambers 807 and the oil chambers 808 are arranged at staggered intervals. The outer ends of the water inlet pipe 802, the water outlet pipe 803, the oil inlet pipe 804 and the oil outlet pipe 805 are arranged outside the cooling box 801, and the inner ends are arranged inside the cooling box 801 through the side wall of the cooling box 801 and the plurality of partitions 806, and the inner ends are closed. The side walls of the water inlet pipe 802 and the water outlet pipe 803 in each water chamber 807 are provided with a water inlet hole and a water outlet hole, respectively. The side walls of the oil inlet pipe 804 and the oil outlet pipe 805 in each oil chamber 808 are provided with an oil inlet hole and an oil outlet hole, respectively. The outer ends of the oil inlet pipe 804 and the oil outlet pipe 805 are connected to the hydraulic oil tank through a pipeline, and a pump body is provided on the pipeline connecting the oil inlet pipe 804 and the hydraulic oil tank. The water inlet pipe 802 and the water outlet pipe 803 are connected to cooling water through a pipeline, and a pump body is provided on the pipeline connecting the water inlet pipe 802 and the cooling water. The cooling water and the hydraulic oil flow into the water chamber 807 and the oil chamber 808 from the water inlet pipe 802 and the oil inlet pipe 804, respectively, and then flow out from the water outlet pipe 803 and the oil outlet pipe 805, respectively. During this period, the cooling water and the hydraulic oil are staggered and overlapped, with a large contact area, a long contact time, and a good heat dissipation effect. The pipeline connecting the oil inlet pipe 804 and the hydraulic oil tank includes a hard pipe 809 and a high-pressure hose 810. The hard pipe 809 is fixed to the frame 2 by a heavy-duty pipe clamp 811, and then the hard pipe 809 is connected to the hydraulic oil pipeline by the high-pressure hose 810. When in use, since the cooler and the hard pipe 809 are both fixed on the oil tank, when the equipment is working, the cooler and the hard pipe 809 are in a state of vibration at the same frequency, and no large shear force will be generated; compared with the cooler, the hard pipe 809 has higher strength and toughness, and is less affected by vibration.

[0053] In one embodiment, the hard tube 809 is connected to the hydraulic oil tank through an overflow pipe 812, and a 0.5 MPa second one-way valve 813 is provided on the overflow pipe 812. When the hydraulic oil pressure in the hard tube 809 exceeds 0.5 MPa, the high-pressure oil will overflow directly from the one-way valve back to the hydraulic oil tank without passing through the cooler, so that the hydraulic oil in the cooler is always within the limited pressure of 0.5 MPa, avoiding blockage inside the cooling box 801 when the hydraulic oil in the hydraulic oil power assembly 4 is under high pressure.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A pure liquid driven piston grouting pump, characterized in that: Including base, frame, pump assembly, hydraulic oil power components; The pump body assembly is arranged on the base through a frame, and the pump body assembly includes an oil cylinder, two slurry cylinders and a lubrication mechanism, the two slurry cylinders are respectively connected to the two ends of the oil cylinder, and the outer ends of the two slurry cylinders are respectively connected to a slurry suction and discharge valve assembly; A cylinder piston assembly is slidably disposed inside the oil cylinder, and the cylinder piston assembly includes a cylinder piston body and two first piston rods, the two first piston rods are respectively fixedly connected to the two sides of the cylinder piston body, a slurry piston body is slidably disposed inside the slurry cylinder, a second piston rod is disposed inside the slurry piston body, and the first piston rod is connected to the second piston rod; The lubrication mechanism includes a grease box and a grease pump. The grease pump includes a housing and a grease piston assembly. A piston cavity and suction and discharge cavities on both sides are provided in the housing. The two sides of the piston cavity are respectively connected to the suction and discharge cavities. The inner diameter of the suction and discharge cavities is smaller than the piston cavity. The grease piston assembly includes a grease piston body and a grease piston rod connected to both sides of the grease piston body. The outer ends of the grease piston rods on both sides are respectively fixedly connected to the suction and discharge piston bodies. The suction and discharge piston body can be slidably arranged in the suction and discharge cavity. The grease piston body divides the piston cavity into a first liquid drive cavity and a second liquid drive cavity. A first liquid drive oil inlet and a first liquid drive oil inlet are provided on the outer wall of the housing. Two liquid drive oil inlets, the first liquid drive oil inlet is communicated with the first liquid drive cavity, the second liquid drive oil inlet is communicated with the second liquid drive cavity, the suction and discharge cavities on both sides are respectively provided with an oil suction port and an oil outlet, the oil suction port is connected to the grease tank through an oil suction pipe, the oil outlet is connected to the oil outlet pipe, and the oil suction pipe and the oil outlet pipe are respectively provided with a first non-return valve; a hydraulic control port is respectively provided at the stroke end points on both sides of the oil cylinder, the two hydraulic control ports are respectively connected to the first liquid drive oil inlet and the second liquid drive oil inlet through pipes, and a lubrication port is respectively provided at the inner end stroke end point of the slurry cylinder, and the two lubrication ports are respectively connected to the oil outlets on both sides through oil outlet pipes; A water tank is provided at the connection between the oil cylinder and the slurry cylinder, the outer side of the water tank is sealedly connected to the slurry cylinder, the inner side of the water tank is sealedly connected to the oil cylinder, and a detachable cover plate is provided on the top of the water tank, and the cover plate is sealedly connected to the water tank; The first piston rod and the second piston rod are connected by a connecting assembly, which includes a piston connecting shaft and two sets of fixed sleeves. The outer end of the first piston rod, the inner end of the second piston rod and both ends of the piston connecting shaft are respectively fixed with piston connecting flanges. The inner end of the piston connecting shaft is connected to the first piston rod by a set of fixed sleeves, and the outer end of the piston connecting shaft is connected to the second piston rod by a set of fixed sleeves. The fixed sleeve includes a first half ring and a second half ring, the upper and lower ends of the first half ring and the second half ring are fixedly connected by a bolt respectively, the first half ring and the second half ring are connected by four groups of bolts to form an annular assembly, and a clamping groove for clamping two piston connecting flanges is provided in the annular assembly, the groove walls on both sides of the clamping groove are trapezoidal structures, and the gap between the first half ring and the second half ring is adjustable.

2. A pure liquid drive piston grouting pump as claimed in claim 1, characterized in that: The slurry piston body includes a right pressure cover, a rubber seal, a piston body, a guide ring and a left pressure cover from the outside to the inside. The right pressure cover, the piston body and the left pressure cover are connected by multiple groups of bolts. The rubber seal is arranged between the right pressure cover and the piston body, and the guide ring is arranged between the piston body and the left pressure cover.

3. A pure liquid drive piston grouting pump as claimed in claim 1, characterized in that: The two ends of the oil cylinder are respectively provided with a hydraulic oil port, and the hydraulic oil ports at both ends are connected to the hydraulic oil power assembly through a reversing mechanism; The reversing mechanism includes a hydraulically controlled stroke valve, which includes a valve body, a valve core and an end cover. A piston valve core is horizontally movably provided in the oil inlet chamber of the end cover. A sealing assembly between the piston valve core and the oil inlet chamber is fixedly arranged on the inner wall of the oil inlet chamber. The sealing assembly includes a sealing member and two O-rings from the outside to the inside. A first mounting groove for installing the sealing member and two second mounting grooves for installing the O-rings are provided on the inner wall of the oil inlet chamber. The sealing member is arranged in the first mounting groove, and the two O-rings are respectively arranged in the two second mounting grooves. The inner walls of the sealing member and the two O-rings are both fitted with the piston valve core, and the inner diameter of the oil inlet chamber is equal to the diameter of the piston valve core.

4. A pure liquid drive piston grouting pump as claimed in claim 1, characterized in that: A cooling mechanism is provided on the hydraulic oil tank of the hydraulic oil power assembly.

5. A pure liquid drive piston grouting pump as claimed in claim 4, characterized in that: The cooling mechanism includes a cooling box, a water inlet pipe, a water outlet pipe, an oil inlet pipe and an oil outlet pipe. A plurality of partitions are arranged in the cooling box, and the plurality of partitions divide the cooling box into a plurality of water chambers and oil chambers. The plurality of water chambers and oil chambers are arranged at staggered intervals. The outer ends of the water inlet pipe, the water outlet pipe, the oil inlet pipe and the oil outlet pipe are arranged outside the cooling box, and the inner ends are arranged inside the cooling box through the side walls of the cooling box and the plurality of partitions, and the inner ends are closed; the side walls of the water inlet pipe and the water outlet pipe in each water chamber are respectively provided with water inlet holes and water outlet holes, and the side walls of the oil inlet pipe and the oil outlet pipe in each oil chamber are respectively provided with oil inlet holes and oil outlet holes; the outer ends of the oil inlet pipe and the oil outlet pipe are connected to the hydraulic oil tank through pipelines, a pump body is arranged on the pipeline connecting the oil inlet pipe and the hydraulic oil tank, the water inlet pipe and the water outlet pipe are connected to cooling water through pipelines, and a pump body is arranged on the pipeline connecting the water inlet pipe and the cooling water.

6. A pure liquid drive piston grouting pump as claimed in claim 5, characterized in that: The pipeline connecting the oil inlet pipe and the hydraulic oil tank includes a hard pipe and a high-pressure hose. The hard pipe is fixed to the frame through a heavy-duty pipe clamp, and then the hard pipe is connected to the hydraulic oil pipeline through the high-pressure hose.

7. A pure liquid drive piston grouting pump as claimed in claim 6, characterized in that: The hard pipe is connected to the hydraulic oil tank through an overflow pipe, and a second one-way valve of 0.5 MPa is arranged on the overflow pipe.

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