A liquid compression machine

Abstract

The application discloses a kind of liquid compression machinery, it is related to compressor technical field, including liquid compression mechanism, reciprocating power mechanism and piston lubrication sealing mechanism, liquid compression mechanism contains compression cylinder, the top opening of the compression cylinder is threadedly connected with cylinder cover, hollow piston is vertically slidably connected in the compression cylinder, the upside of the hollow piston is conical mechanism, the bottom end of hollow piston rod is fixedly connected to the top center of the hollow piston, the hollow piston rod is slidably connected with piston rod sealing lubrication limiting mechanism, reciprocating power mechanism bottom end is fixedly connected to the top outside of hollow piston rod;The liquid compression machinery, hollow piston will compress liquid in the reciprocating process in compression cylinder, the compression of liquid is stable and continuous, and the connecting place of piston rod and compression cylinder is well lubricated and sealed, reduces the leakage of the connecting place of piston rod and compression cylinder, improves the compression efficiency of liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a liquid compression machine. BACKGROUND

[0002] At present, compressors are general machines in the fields of aerospace, petrochemical industry, etc. The mainstream compressors on the market mainly include sliding vane type, reciprocating type, centrifugal type and screw type compressors. The reciprocating compressor refers to a kind of compressor that realizes the pressurization and delivery of liquid through the reciprocating movement of the piston or diaphragm in the oil cylinder to periodically change the volume of the cylinder body. It belongs to a volumetric compressor. According to the reciprocating component, it is divided into piston type and diaphragm type compressors. In the existing piston type compressor, the piston can pressurize and deliver liquid when it is pressed to one end of the cylinder body. When the piston moves in the opposite direction in the cylinder body, it sucks liquid into the cylinder body. During half of the piston stroke, the liquid cannot be compressed and delivered, resulting in intermittent compression and delivery of liquid, low liquid compression efficiency, and leakage at the connection between the piston rod and the cylinder body, which also reduces the liquid compression efficiency. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the existing defects and provide a liquid compression machine. The hollow piston will compress liquid during reciprocation in the compression cylinder, the compression of liquid is stable and continuous, the connection between the piston rod and the compression cylinder has good lubrication and sealing effect, lubricating oil can be continuously added to reduce leakage at the connection between the piston rod and the compression cylinder, and the compression efficiency of liquid is improved, which can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a liquid compression machine, comprising:

[0005] The liquid compression mechanism comprises a compression cylinder, a cylinder cover, a hollow piston, a hollow piston rod, an inlet liquid electromagnetic valve, an inlet liquid header, an outlet liquid check valve, an outlet liquid header and an outlet liquid main pipe. The top opening of the compression cylinder is threadedly connected with the cylinder cover. The hollow piston is vertically and slidably connected in the compression cylinder. The upper side of the hollow piston is a conical mechanism. The bottom end of the hollow piston rod is fixedly connected with the hollow piston rod. The hollow piston rod is slidably connected with the piston rod sealing and lubricating limiting mechanism, and the piston rod sealing and lubricating limiting mechanism is fixedly connected in the through hole in the middle of the cylinder cover. The left upper and lower ends of the compression cylinder are respectively provided with inlet liquid ports. One end of each of the two inlet liquid ports is connected with one end of the two inlet liquid electromagnetic valves. The other end of each of the two inlet liquid electromagnetic valves is connected with one end of the inlet liquid header. The right upper and lower ends of the compression cylinder are respectively provided with outlet gas ports. One end of each of the two outlet gas ports is connected with one end of the two outlet liquid check valves. The other end of each of the two outlet liquid check valves is connected with one end of the outlet liquid header. One end of the outlet liquid main pipe is fixedly connected with the outlet liquid header.

[0006] The bottom end of the reciprocating power mechanism is fixedly connected to the top outer side of the hollow piston rod.

[0007] The piston lubrication sealing mechanism is installed on the outer side of the hollow piston.

[0008] The top of the compression cylinder is sealed by the cylinder cover. The reciprocating power mechanism drives the hollow piston rod to move up and down. The piston rod sealing and lubrication limiting mechanism limits the hollow piston rod. The hollow piston rod drives the hollow piston to move up and down in the compression cylinder. When the hollow piston moves up in the compression cylinder, the upper liquid inlet electromagnetic valve is closed, the lower liquid inlet electromagnetic valve is opened, and the external liquid enters the space below the hollow piston in the compression cylinder through the liquid inlet manifold and the lower liquid inlet electromagnetic valve. The liquid in the space above the hollow piston in the compression cylinder is compressed and then enters the liquid discharge manifold and the liquid discharge main pipe through the upper liquid discharge one-way valve. When the hollow piston moves down in the compression cylinder, the upper liquid inlet electromagnetic valve is opened, the lower liquid inlet electromagnetic valve is closed, and the external liquid enters the space above the hollow piston in the compression cylinder through the liquid inlet manifold and the upper liquid inlet electromagnetic valve. The liquid in the space below the hollow piston in the compression cylinder is compressed and then enters the liquid discharge manifold and the liquid discharge main pipe through the lower liquid discharge one-way valve. The hollow piston reciprocating process compresses the liquid and maintains the continuity of the compressed liquid. The piston lubrication sealing mechanism can improve the sealing between the hollow piston and the compression cylinder.

[0009] Further, the piston rod sealing and lubrication limiting mechanism comprises a limiting sleeve, a screw one and a sealing ring. The limiting sleeve is arranged in the through hole in the middle of the cylinder cover. The limiting sleeve is installed along the upper side of the cylinder cover by the screw one. The hollow piston rod passes through the inner side of the limiting sleeve. The sealing ring is installed in the two annular installation grooves in the inner side of the limiting sleeve. The screw one fixes the limiting sleeve. The limiting sleeve limits the hollow piston rod, so that the hollow piston rod stably slides up and down along the limiting sleeve. The sealing ring can improve the sealing of the sliding part of the hollow piston rod and the limiting sleeve.

[0010] Further, the piston rod sealing and lubrication limiting mechanism further comprises a lubricating oil blocking ring. The lubricating oil blocking ring is integrally connected to the upper side of the limiting sleeve. The lubricating oil blocking ring is arranged with the limiting sleeve as the same center. The lubricating oil blocking ring can block the lubricating oil on the inner side of the upper surface of the limiting sleeve. The lubricating oil inside the lubricating oil blocking ring can seep into the space between the limiting sleeve and the hollow piston rod with the up and down movement of the hollow piston rod.

[0011] Further, the reciprocating power mechanism comprises a mounting vertical frame, a fixing bolt and a reciprocating control component. The top outer side of the hollow piston rod is fixedly connected to the bottom of the mounting vertical frame by the fixing bolt. The top of the mounting vertical frame is fixedly connected to the bottom end of the reciprocating control component by the fixing bolt. The reciprocating control component drives the hollow piston rod to move up and down by the fixing bolt and the mounting vertical frame.

[0012] Further, the piston lubrication sealing mechanism comprises a positioning column, a piston ring I and a piston ring II, annular grooves I are formed on the upper and lower ends of the outer periphery of the hollow piston, the piston ring I is installed in each of the annular grooves I, an annular groove II is formed in the middle of the outer periphery of the hollow piston, the piston ring II is installed in the annular groove II, the positioning column is connected to the middle of the outer periphery of the hollow piston, and the positioning column is connected to the piston ring II. The piston ring I and the piston ring II can improve the sealing between the compression cylinder and the hollow piston, the positioning column fixes and positions the piston ring II, and the accuracy and stability of the installation of the piston ring II are improved.

[0013] Further, the compression cylinder internal part dismounting and maintaining structure is installed at the bottom end of the compression cylinder. The compression cylinder internal part dismounting and maintaining structure can discharge the liquid in the compression cylinder, open the bottom of the compression cylinder, and maintain the hollow piston and accessories in the compression cylinder.

[0014] Further, the piston rod lubricating oil adding control mechanism comprises an adding amount control assembly, a piston rod lubricating oil pressurized adding assembly and a pressing assembly, the piston rod lubricating oil pressurized adding assembly is installed on the side of the adding amount control assembly, the lubricating oil adding head in the piston rod lubricating oil pressurized adding assembly corresponds to the upper side of the oil baffle ring, and the pressing assembly is located above the piston rod lubricating oil pressurized adding assembly.

[0015] The adding amount control assembly can change the height of the piston rod lubricating oil pressurized adding assembly. When the reciprocating control assembly in the reciprocating power mechanism moves downward, the piston rod lubricating oil pressurized adding assembly is extruded by the pressing assembly, the piston rod lubricating oil is extruded to the inner side of the oil baffle ring, the oil baffle ring temporarily stores the lubricating oil, and the hollow piston rod is lubricated.

[0016] Further, the liquid filtering mechanism is fixedly connected to the middle of the liquid inlet header at the right end. The liquid filtering mechanism can filter the liquid entering the liquid inlet header, avoid impurities in the liquid from entering the compression cylinder to affect the recovery of lubricating oil, avoid impurities in the liquid from affecting the sealing performance of the compression machine, and compress clean liquid.

[0017] Compared with the prior art, the liquid compression machine has the following advantages:

[0018] 1. The hollow piston compresses the liquid during reciprocation in the compression cylinder, the compression of the liquid is stable and continuous, the connection between the piston rod and the compression cylinder is well lubricated and sealed, lubricating oil can be continuously added, leakage at the connection between the piston rod and the compression cylinder is reduced, and the compression efficiency of the liquid is improved.

[0019] 2、The liquid filtering mechanism can filter the liquid entering into the liquid inlet header, avoid the impurities in the liquid from entering into the compression cylinder, avoid the impurities in the liquid from affecting the sealing property of the compression machine, and can compress clean liquid. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic diagram of the liquid compression machine of the present application;

[0021] Figure 2 It is a structure schematic diagram of the liquid compression machine of the present application; Figure 1 It is a structure schematic diagram of the liquid compression machine of the present application;

[0022] Figure 3 It is a structure schematic diagram of the liquid compression machine of the present application;

[0023] Figure 4 It is a structure schematic diagram of the liquid compression machine of the present application;

[0024] Figure 5 It is a structure schematic diagram of the liquid compression machine of the present application; Figure 4 It is a structure schematic diagram of the liquid compression machine of the present application;

[0025] Figure 6 It is a structure schematic diagram of the liquid compression machine of the present application; Figure 4 It is a structure schematic diagram of the liquid compression machine of the present application;

[0026] Figure 7 It is a structure schematic diagram of the liquid compression machine of the present application; Figure 4 It is a structure schematic diagram of the liquid compression machine of the present application;

[0027] Figure 8 It is a structure schematic diagram of the liquid compression machine of the present application;

[0028] In the figure: 1 reinforcing rib, 2 liquid compression mechanism, 21 compression cylinder, 22 cylinder cover, 23 hollow piston, 24 hollow piston rod, 25 liquid inlet solenoid valve, 26 liquid inlet manifold, 27 liquid outlet check valve, 28 liquid outlet manifold, 29 liquid outlet main pipe, 210 sealing rubber ring I, 3 piston rod sealing and lubricating limiting mechanism, 31 limiting sleeve, 32 screw I, 33 sealing ring, 34 lubricating oil blocking ring, 4 piston lubricating and sealing mechanism, 41 positioning column, 42 piston ring I, 43 piston ring II, 5 reciprocating power mechanism, 51 mounting vertical frame, 52 fixing bolt, 53 power U-shaped support, 54 U-shaped reciprocating rod, 55 sliding rod, 56 movable shaft, 57 roller, 58 control wheel disc, 59 power shaft, 510 power motor, 6 piston rod lubricating oil adding control mechanism, 61 control frame, 62 sliding column, 63 screw, 64 knob, 65 lifting block, 66 outer fixed plate, 67 lubricating oil tank, 68 oil tank fixing sleeve, 69 hose, 610 lubricating oil adding head, 611 adding head mounting plate, 612 adding cover, 613 inflation foot pump, 614 screw II, 615 bent frame, 616 pressing disc, 7 compression cylinder internal component dismounting and maintaining structure, 71 bottom cover, 72 screw III, 73 oil outlet pipe, 74 control valve I, 75 sealing rubber ring II, 76 sealing ring, 8 liquid filtering mechanism, 81 filtering half pot, 82 connecting bolt, 83 filtering mesh cylinder, 84 external connecting ring, 85 filtrate cotton, 86 liquid conveying pipeline. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] Embodiment one, please refer to Figures 1 to 6 The embodiment provides a technical solution: a liquid compression machine, comprising a liquid compression mechanism 2, a reciprocating power mechanism 5 and a piston lubricating and sealing mechanism 4.

[0031] The liquid compression mechanism 2 comprises a compression cylinder 21, a cylinder cover 22, a hollow piston 23, a hollow piston rod 24, a liquid inlet solenoid valve 25, a liquid inlet manifold 26, a liquid outlet check valve 27, a liquid outlet manifold 28 and a liquid outlet main pipe 29. The cylinder cover 22 is threadedly connected to the top opening of the compression cylinder 21. The hollow piston 23 is vertically and slidingly connected in the compression cylinder 21. The upper side of the hollow piston 23 is a conical mechanism. The bottom end of the hollow piston rod 24 is fixedly connected to the top center of the hollow piston 23. The hollow piston rod 24 is slidingly connected with the piston rod sealing and lubricating limiting mechanism 3, and the piston rod sealing and lubricating limiting mechanism 3 is fixed in the through hole in the middle of the cylinder cover 22.

[0032] The left upper and lower ends of the compression cylinder 21 are respectively provided with liquid inlet ports, the two liquid inlet ports are respectively connected to one end of two liquid inlet electromagnetic valves 25, the other end of the two liquid inlet electromagnetic valves 25 is respectively connected to two ends of a liquid inlet header 26, the right upper and lower ends of the compression cylinder 21 are respectively provided with gas outlet ports, the two gas outlet ports are respectively connected to one end of two liquid outlet check valves 27, the other end of the two liquid outlet check valves 27 is respectively connected to two ends of a liquid outlet header 28, and one end of a liquid outlet main pipe 29 is fixedly connected to the middle part of the liquid outlet header 28.

[0033] The hollow structure of the hollow piston rod 24 and the hollow piston 23 can reduce the inertia of the up and down movement.

[0034] The liquid compression mechanism 2 further comprises a sealing rubber ring 210, which is arranged between the edge of the compression cylinder 21 and the cylinder cover 22, for improving the sealing between the compression cylinder 21 and the cylinder cover 22.

[0035] The piston rod sealing, lubricating and limiting mechanism 3 comprises a limiting sleeve 31, a screw 32 and a sealing ring 33, the limiting sleeve 31 is arranged in the through hole in the middle part of the cylinder cover 22, the mounting side of the limiting sleeve 31 is fixed to the upper side of the cylinder cover 22 by the screw 32, the hollow piston rod 24 passes through the inner side of the limiting sleeve 31, and the sealing ring 33 is arranged in the two annular mounting grooves in the inner side of the limiting sleeve 31. The screw 32 fixes the limiting sleeve 31, the limiting sleeve 31 limits the hollow piston rod 24, so that the hollow piston rod 24 stably slides up and down along the limiting sleeve 31, and the sealing ring 33 can improve the sealing of the sliding part of the hollow piston rod 24 and the limiting sleeve 31.

[0036] The piston rod sealing, lubricating and limiting mechanism 3 further comprises a lubricating oil blocking ring 34, the lubricating oil blocking ring 34 is integrally connected to the upper side of the limiting sleeve 31, and the lubricating oil blocking ring 34 is arranged with the limiting sleeve 31 as a common center. The lubricating oil blocking ring 34 can block the lubricating oil on the inner side of the upper surface of the limiting sleeve 31, so that the lubricating oil enclosed on the inner side of the lubricating oil blocking ring 34 can seep into the space between the limiting sleeve 31 and the hollow piston rod 24 along with the up and down movement of the hollow piston rod 24.

[0037] The bottom end of the reciprocating power mechanism 5 is fixedly connected to the top outer side of the hollow piston rod 24.

[0038] The reciprocating power mechanism 5 comprises a mounting vertical frame 51, a fixed bolt 52 and a reciprocating control assembly, the top outer side of the hollow piston rod 24 is fixedly connected to the bottom of the mounting vertical frame 51 through the fixed bolt 52, and the top of the mounting vertical frame 51 is fixedly connected to the bottom end of the reciprocating control assembly through the fixed bolt 52. The reciprocating control assembly drives the hollow piston rod 24 to move up and down reciprocatingly through the fixed bolt 52 and the mounting vertical frame 51.

[0039] The reciprocating control assembly comprises a power U-shaped support 53, a U-shaped reciprocating rod 54, a sliding rod 55, a movable shaft 56, a roller 57, a control wheel disc 58, a power shaft 59 and a power motor 510. The upper and lower ends of the power U-shaped support 53 are respectively provided with square sliding holes. The upper and lower ends of the U-shaped reciprocating rod 54 are respectively fixedly connected with the sliding rods 55. The U-shaped reciprocating rod 54 is located inside the power U-shaped support 53. The two sliding rods 55 at the upper and lower ends of the U-shaped reciprocating rod 54 are respectively vertically slidably connected with the two square sliding holes. The two ends of the U-shaped reciprocating rod 54 are respectively rotatably connected with the rollers 57 through the movable shafts 56. The middle part of the power U-shaped support 53 is rotatably connected with the power shaft 59. The rear end of the power shaft 59 is fixedly connected with the output shaft of the power motor 510. The front end of the power shaft 59 is fixedly connected with the middle part of the control wheel disc 58. The control wheel disc 58 is located inside the U-shaped reciprocating rod 54 and is triangular and has three rounded corners. The middle part of each side of the control wheel disc 58 is provided with an arc-shaped groove. The two rollers 57 are respectively in rolling contact with the outer circumferential side of the control wheel disc 58. The bottom end of the lower sliding rod 55 is fixedly connected with the top of the vertical frame 51 through the fixing bolt 52.

[0040] The power motor 510 drives the power shaft 59 to rotate, thereby driving the control wheel disc 58 to rotate in the U-shaped reciprocating rod 54. Since the rollers 57 are in rolling connection with the control wheel disc 58, with the rotation of the control wheel disc 58, the two rollers 57 are alternately in contact with one corner of the control wheel disc 58 and the arc-shaped groove opposite to the corner, thereby driving the U-shaped reciprocating rod 54 and the sliding rod 55 to slide up and down along the square sliding hole, thereby driving the hollow piston rod 24 to reciprocate up and down through the installation of the vertical frame 51.

[0041] The piston lubricating and sealing mechanism 4 comprises a positioning column 41, a piston ring one 42 and a piston ring two 43. The outer circumferential side of the hollow piston 23 is provided with annular grooves one at the upper and lower ends. The two annular grooves one are respectively provided with the piston ring one 42. The outer circumferential side of the hollow piston 23 is provided with an annular groove two at the middle part. The annular groove two is provided with the piston ring two 43. The outer circumferential side of the hollow piston 23 is provided with the positioning column 41 at the middle part. The positioning column 41 is in clamping connection with the piston ring two 43. The piston ring one and the piston ring two can improve the sealing performance between the compression cylinder and the hollow piston. The positioning column 41 fixes and positions the piston ring two 43, thereby improving the installation accuracy and stability of the piston ring two 43.

[0042] In use, the top of the compression cylinder 21 is sealed through the cylinder cover 22. The reciprocating power mechanism 5 drives the hollow piston rod 24 to move up and down. The piston rod sealing, lubricating and limiting mechanism 3 limits the hollow piston rod 24. The hollow piston rod 24 drives the hollow piston 23 to move up and down in the compression cylinder 21.

[0043] When the hollow piston 23 moves upward in the compression cylinder 21, the upper liquid inlet electromagnetic valve 25 is closed, the lower liquid inlet electromagnetic valve 25 is opened, the external liquid enters the space below the hollow piston 23 in the compression cylinder 21 through the liquid inlet manifold 26 and the lower liquid inlet electromagnetic valve 25, and the liquid in the space above the hollow piston 23 in the compression cylinder 21 is compressed and then enters the liquid outlet manifold 28 and the liquid outlet main pipe 29 through the upper liquid outlet check valve 27;

[0044] When the hollow piston 23 moves downward in the compression cylinder 21, the upper liquid inlet electromagnetic valve 25 is opened, the lower liquid inlet electromagnetic valve 25 is closed, the external liquid enters the space above the hollow piston 23 in the compression cylinder 21 through the liquid inlet manifold 26 and the upper liquid inlet electromagnetic valve 25, and the liquid in the space below the hollow piston 23 in the compression cylinder 21 is compressed and then enters the liquid outlet manifold 28 and the liquid outlet main pipe 29 through the lower liquid outlet check valve 27, and the reciprocating process of the hollow piston 23 compresses the liquid and maintains the continuity of the compressed liquid;

[0045] The piston lubrication sealing mechanism 4 can improve the sealing between the hollow piston and the compression cylinder.

[0046] Embodiment two, please refer to Figures 1 to 3 The embodiment provides a technical scheme: a liquid compression machine, the embodiment is substantially same as the embodiment one, and the difference lies in that:

[0047] The piston rod lubricating oil adding control mechanism 6 comprises an adding amount control assembly, a piston rod lubricating oil pressurized adding assembly and a pressing assembly, the piston rod lubricating oil pressurized adding assembly is installed on the side of the adding amount control assembly, the lubricating oil adding head 610 in the piston rod lubricating oil pressurized adding assembly corresponds to the upper side of the sliding oil baffle ring 34, and the pressing assembly is located above the piston rod lubricating oil pressurized adding assembly.

[0048] The adding amount control assembly can change the height of the piston rod lubricating oil pressurized adding assembly, when the reciprocating control assembly in the reciprocating power mechanism 5 moves downward, the piston rod lubricating oil pressurized adding assembly is extruded through the pressing assembly, the piston rod lubricating oil is extruded to the inner side of the sliding oil baffle ring 34, the sliding oil baffle ring 34 temporarily stores the lubricating oil, and the hollow piston rod 24 is lubricated.

[0049] The adding amount control assembly comprises a control frame 61, a slide column 62, a screw rod 63, a knob 64, a lifting block 65 and an outer fixing plate 66, the vertical slide column 62 is fixedly connected in the control frame 61, the vertical screw rod 63 is rotatably connected in the control frame 61, the top end of the screw rod 63 is fixedly connected with the knob 64, the screw hole in the lifting block 65 is threadedly connected with the screw rod 63, the slide hole in the lifting block 65 is vertically slidably connected with the slide column 62, and the outer side of the control frame 61 is provided with the outer fixing plate 66, the outer fixing plate 66 is provided with a fixing hole, and the control frame 61 can be installed by cooperating with the outer fixing plate 66 through a screw.

[0050] The knob 64 can drive the screw rod 63 to rotate, the lifting block 65 can be driven to move up and down along the slide column 62 through the threaded action of the screw rod 63 and the lifting block 65, so that the height of the piston rod lubricating oil pressurizing and adding assembly can be changed, at this time, the pressing degree of the piston rod lubricating oil pressurizing and adding assembly by the U-shaped reciprocating rod 54 moving up and down will also be changed, so that the lubricating oil adding amount each time is changed, when the piston rod lubricating oil pressurizing and adding assembly is raised, the pressing degree of the piston rod lubricating oil pressurizing and adding assembly by the U-shaped reciprocating rod 54 moving downward is greater, and the oil output each time is more, and vice versa.

[0051] The piston rod lubricating oil pressurizing and adding assembly comprises a lubricating oil tank 67, an oil tank fixing sleeve 68, a hose 69, a lubricating oil adding head 610, an adding head mounting plate 611, an adding cover 612 and a foot pump 613, the side surface of the lifting block 65 is fixedly connected with the lubricating oil tank 67 through the oil tank fixing sleeve 68, the top of the lubricating oil tank 67 is provided with the foot pump 613, the inflation port of the foot pump 613 is connected with the top air hole of the lubricating oil tank 67, the lubricating oil tank 67 is provided with the adding cover 612 which is threadedly connected with the oil supplement port on one side of the top of the lubricating oil tank 67, one end of the hose 69 is connected with the bottom of the lubricating oil tank 67, the other end of the hose 69 is connected with the top of the lubricating oil adding head 610, and the lubricating oil adding head 610 is fixed to the bottom side surface of the mounting vertical frame 51 through the adding head mounting plate 611.

[0052] When the U-shaped reciprocating rod 54 moves downward, the foot pump 613 is pressed by the pressing assembly, the lubricating oil in the lubricating oil tank 67 is pressurized by the foot pump 613, and then is sent into the lubricating oil adding head 610 through the hose 69, and then falls to the inner side of the lubricating oil baffle ring 34, and the adding cover 612 can be opened to add supplement when the lubricating oil in the lubricating oil tank 67 is insufficient.

[0053] The pressing assembly comprises a screw 614, a bent frame 615 and a pressing disc 616, the bottom of the U-shaped reciprocating rod 54 is fixedly connected with the bent frame 615 through the screw 614, the bottom of the bent frame 615 is fixedly connected with the pressing disc 616, and the pressing disc 616 is located directly above the foot pump 613.

[0054] With each time down of U type reciprocating rod 54, bending frame 615 drives press plate 616 down, press plate 616 presses inflating foot pump 613 to inflate and pressurize into lubricating oil tank 67, and each time press plate 616 moves up, inflating foot pump 613 resets to inhale.

[0055] Embodiment three, please refer to Figure 3 、 Figure 4 and Figure 7 , this embodiment provides a technical solution: a kind of liquid compression machinery, this embodiment is substantially same as the structure of embodiment two, the difference is:

[0056] It further includes compression cylinder internal component dismounting maintenance structure 7, and the compression cylinder internal component dismounting maintenance structure 7 includes bottom cover 71, screw three 72, oil outlet pipe 73, control valve one 74, sealing rubber ring two 75, sealing ring 76, the bottom end of compression cylinder 21 is fixedly connected with bottom cover 71 by screw three 72, the middle part of bottom cover 71 is concave, and sealing ring 76 is arranged between bottom cover 71 and the bottom inner wall of compression cylinder 21, sealing ring 76 adopts O type rubber ring, sealing rubber ring two 75 is arranged between bottom cover 71 and the bottom edge of compression cylinder 21, the air tightness between bottom cover 71 and compression cylinder 21 can be improved by sealing ring 76 and sealing rubber ring two 75, and oil seepage is prevented.

[0057] The middle part of bottom cover 71 is fixedly connected with the top of oil outlet pipe 73, and control valve one 74 is installed in the middle part of oil outlet pipe 73.

[0058] When control valve one 74 is opened, the oil collected at the bottom of bottom cover 71 is discharged through oil outlet pipe 73, and at this time, bottom cover 71 can be opened by screw three 72 to maintain the components in compression cylinder 21.

[0059] Embodiment four, please refer to Figure 1 、 Figure 3 and Figure 8 , this embodiment provides a technical solution: a kind of liquid compression machinery, this embodiment is substantially same as the structure of embodiment three, the difference is:

[0060] It further includes liquid filtering mechanism 8, and the right end of liquid filtering mechanism 8 is fixedly connected with the middle part of liquid inlet header 26.Liquid filtering mechanism 8 can filter the liquid entering liquid inlet header 26, avoid the impurities in the liquid from entering compression cylinder 21 to affect the recovery of lubricating oil, also avoid the impurities in the liquid from affecting the sealing property of compression machinery, and can compress clean liquid.

[0061] The liquid filtering mechanism 8 comprises filter half pots 81, connecting bolts 82, filter screen barrels 83, external connecting rings 84 and filter cotton 85. The filter half pots 81 are arranged oppositely and are provided with connecting edges at opposite ends. The two connecting edges are connected by the connecting bolts 82 to form a filter pot. The filter screen barrel 83 is arranged in the filter pot and is provided with a detachable end cover. The filter cotton 85 is arranged in the filter screen barrel 83.

[0062] The external connecting ring 84 is fixedly connected to the outer periphery of the filter screen barrel 83 and is penetrated by the connecting bolt 82. The left filter half pot 81 is provided with a liquid feeding pipe 86 at the left end. The right filter half pot 81 is provided with a pipe connecting inlet of the liquid collecting pipe 26.

[0063] The liquid enters the filter pot through the liquid feeding pipe 86, is filtered by the filter screen barrel 83 and the filter cotton 85 and then enters the liquid collecting pipe 26. If the filtering effect of the filter cotton 85 is reduced after long-term use, the two filter half pots 81 are opened by the connecting bolts 82, the filter screen barrel 83 is removed, the detachable end cover at the end of the filter screen barrel 83 is opened and the filter cotton 85 is replaced.

[0064] In other embodiments, please refer to Figure 1 The compression cylinder 21 is provided with the reinforcing ribs 1 in an annular array on the outer periphery. The reinforcing ribs 1 are integrally formed with the compression cylinder 21 to improve the structural strength of the compression cylinder 21 and achieve good explosion-proof effect. Since the liquid is continuously compressed in the compression cylinder 21, the reinforcing ribs 1 can improve the structural strength of the compression cylinder 21 and prevent the compression cylinder 21 from being deformed to affect the normal operation of the compression machine.

[0065] It is worth noting that the inlet liquid electromagnetic valve 25 and the input end of the power motor 510 are electrically connected to the output end of the external PLC controller in the above embodiments. The power motor 510 is a servo motor. The external PLC controller controls the working of the inlet liquid electromagnetic valve 25 and the power motor 510 by using the method commonly used in the prior art.

[0066] It should be noted that the relational terms herein such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device.

[0067] While embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid compression machine characterized by, Include: Liquid compression mechanism (2), containing compression cylinder (21), the top of the compression cylinder (21) is threadedly connected with the cylinder cover (22), the hollow piston (23) is vertically and slidably connected in the compression cylinder (21), the upper side of the hollow piston (23) is a tapering mechanism, the bottom end of the hollow piston rod (24) is fixedly connected with the top center of the hollow piston (23), the hollow piston rod (24) is slidably connected with the piston rod sealing and lubricating limiting mechanism (3), and the piston rod sealing and lubricating limiting mechanism (3) is fixed in the through hole in the middle of the cylinder cover (22), the left side of the compression cylinder (21) is provided with liquid inlet at the upper and lower ends, respectively, two liquid inlet electromagnetic valves (25) are connected with one end of the two liquid inlets, respectively, the other end of the two liquid inlet electromagnetic valves (25) is connected with the two ends of the liquid inlet header (26), respectively, the right side of the compression cylinder (21) is provided with gas outlet at the upper and lower ends, respectively, two liquid discharge one-way valves (27) are connected with one end of the two liquid outlets, respectively, the other end of the two liquid discharge one-way valves (27) is connected with the two ends of the liquid discharge header (28), respectively, one end of the liquid discharge header (28) is fixedly connected with the liquid discharge main pipe (29); Reciprocating power mechanism (5), the bottom end is fixedly connected with the top outer side of the hollow piston rod (24); Piston lubricating and sealing mechanism (4) is installed on the outer side of the hollow piston (23).

2. The liquid compression machine of claim 1, wherein: The piston rod sealing and lubricating limiting mechanism (3) comprises a limiting sleeve (31), a screw (32) and a sealing ring (33), the limiting sleeve (31) is arranged in the through hole in the middle of the cylinder cover (22), the limiting sleeve (31) is fixed on the upper side of the cylinder cover (22) through the screw (32), the hollow piston rod (24) passes through the inner side of the limiting sleeve (31), and the sealing ring (33) is arranged in the two annular mounting grooves in the inner side of the limiting sleeve (31).

3. The liquid compression machine of claim 2, wherein: The piston rod sealing and lubricating limiting mechanism (3) further comprises a lubricating oil blocking ring (34), the lubricating oil blocking ring (34) is integrally formed on the upper side of the limiting sleeve (31), and the lubricating oil blocking ring (34) is arranged at the same center as the limiting sleeve (31).

4. The liquid compression machine of claim 1, wherein: The reciprocating power mechanism (5) comprises a mounting vertical frame (51), a fixed bolt (52) and a reciprocating control assembly, the top outer side of the hollow piston rod (24) is fixedly connected with the bottom of the mounting vertical frame (51) through the fixed bolt (52), and the top of the mounting vertical frame (51) is fixedly connected with the bottom end of the reciprocating control assembly through the fixed bolt (52).

5. The liquid compression machine of claim 1, wherein: The piston lubricating and sealing mechanism (4) comprises a positioning column (41), a piston ring (42) and a piston ring (43), the outer circumferential side of the hollow piston (23) is provided with an annular groove one at the upper and lower ends, respectively, the piston ring (42) is arranged in the two annular grooves one, the outer circumferential side of the hollow piston (23) is provided with an annular groove two in the middle, the piston ring (43) is arranged in the annular groove two, and the positioning column (41) is connected with the piston ring (43).

6. The liquid compression machine of claim 1, wherein: The compression cylinder (21) is provided with a compression cylinder internal component dismounting and maintaining structure (7) at the bottom end.

7. The liquid compression machine of claim 3, wherein: The piston rod lubricating oil adding control mechanism (6) comprises an adding amount control assembly, a piston rod lubricating oil pressurized adding assembly and a pressing assembly. The piston rod lubricating oil pressurized adding assembly is installed on the side of the adding amount control assembly. The lubricating oil adding head (610) in the piston rod lubricating oil pressurized adding assembly corresponds to the upper side of the oil blocking ring (34). The pressing assembly is located above the piston rod lubricating oil pressurized adding assembly.

8. The liquid compression machine of claim 1, wherein: The liquid filtering mechanism (8) is fixedly connected to the middle part of the liquid inlet header (26) at the right end.

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