Mechanical-hydraulic linkage reciprocating drive fluid conveying device

Abstract

The utility model belongs to the technical field of mechanical engineering, and discloses a mechanical-hydraulic linkage reciprocating driving fluid conveying device which comprises a base, a reciprocating driving device is fixedly installed at the position, close to the middle, of the base, and the left end and the right end of the reciprocating driving device are communicated with the same working cylinder assembly. A power device is further arranged on the base close to the reciprocating driving device, the power output end of the power device is in transmission connection with the reciprocating driving device, and a control cabinet is fixedly installed on the base close to the edge. The fluid conveying device is simple in overall structure, smooth in reciprocating motion state in the fluid conveying process, convenient to maintain and capable of improving the using effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical engineering technical field, specifically speaking, relate to a machine liquid linkage reciprocating drive fluid conveying device. BACKGROUND

[0002] In many industrial fields, such as petroleum chemical industry, food processing, pharmaceuticals, fluid conveying is a crucial link, and reciprocating drive mode is widely used in fluid conveying device. Reciprocating drive can realize the periodic suction and discharge of fluid, meet the needs of different production processes for fluid conveying.

[0003] In the traditional fluid conveying device, reciprocating drive is usually realized by mechanical crank connecting rod mechanism, which often has poor flexibility, weak load adaptability, and serious wear and tear, etc. ; Hydraulic control electromagnetic reversing reciprocating mechanism is also often used, but the connection state of the oil way is changed by using hydraulic reversing valve, which is composed of valve body, valve core, electromagnet / liquid control assembly, etc. The valve core and valve body need high precision cooperation, and the requirement of hydraulic oil is high. Although the reversing response is fast, the reversing impact is large, the energy released by the hydraulic pressure needs system optimization, and the maintenance frequency of electronic components is high.

[0004] A Chinese patent with application number CN2024212194952 discloses a crankshaft, reciprocating compressor and refrigeration equipment, wherein the crankshaft comprises a crank arm, a main shaft and a secondary shaft, the main shaft is connected to one end of the crank arm, the secondary shaft is connected to the end of the crank arm away from the main shaft, and the secondary shaft is eccentrically arranged relative to the axis of the main shaft. The crank arm is provided with a balance block, the balance block is arranged on the peripheral wall of the crank arm away from the secondary shaft, the surface of the balance block is provided with a first weight reduction structure for reducing the weight of the balance block, and the end of the crank arm away from the balance block is provided with a second weight reduction structure, the second weight reduction structure is located on the end face of the crank arm away from the secondary shaft and is arranged in the direction of the secondary shaft. The second weight reduction structure is used for reducing the weight of the crank arm and the secondary shaft. The crankshaft disclosed by the utility model can effectively reduce the overall mass of the crankshaft and reduce the inertia excitation in the reciprocating rotation process of the crankshaft.

[0005] However, the application only optimizes the crank structure, and cannot change the poor flexibility of mechanical reciprocating drive. UTILITY MODEL CONTENTS

[0006] The main technical problem to be solved by the utility model is to provide a machine liquid linkage reciprocating drive fluid conveying device with simple overall structure, which can ensure smooth reciprocating motion state during fluid conveying, is easy to maintain and improves use effect.

[0007] To solve the above technical problems, the utility model provides the following technical scheme:

[0008] A kind of machine fluid linkage reciprocating drive fluid delivery device, including base, reciprocating drive device is fixedly installed near middle position on the base, the same group of working cylinder assembly is communicated with the left and right ends of reciprocating drive device, power device is also provided near reciprocating drive device position on the base, and the power output end of power device is transmission connection with reciprocating drive device, control cabinet is fixedly installed near edge position on the base;

[0009] The reciprocating drive device includes mounting seat fixedly installed on the base, box body assembly is fixedly installed on the mounting seat, the first cylinder barrel assembly is communicated with the left end of box body assembly, and the second cylinder barrel assembly is communicated with the right end of box body assembly.

[0010] The buffer and the liquid reservoir are communicated between the first cylinder barrel assembly and the second cylinder barrel assembly.

[0011] The following is the further optimization of the utility model to the above technical solutions:

[0012] The box body assembly includes box body fixedly installed on the base, transmission shaft is rotatably installed in the box body, one end of transmission shaft penetrates the inner wall of box body and is fixedly connected with the power output end of power device, and eccentric wheel is fixedly installed on the outer surface of transmission shaft.

[0013] Further optimization: first piston rod is slidably installed on the left inner wall of box body, and first piston rod is perpendicular to transmission shaft, first piston rod is fixedly installed with first roller on the end close to transmission shaft, and first roller is simultaneously connected with the top of eccentric wheel.

[0014] Further optimization: second piston rod is slidably installed on the right inner wall of box body, and the second piston rod is perpendicular to transmission shaft, the second piston rod is fixedly installed with second roller on the end close to transmission shaft, and the second roller is simultaneously connected with the top of eccentric wheel.

[0015] Further optimization: the first cylinder barrel assembly includes first cylinder barrel fixedly installed on the left outer wall of box body, first piston is slidably installed in the first cylinder barrel, the other end of first piston rod is fixedly connected with first piston, and third piston rod is fixedly connected on the other end surface of first piston;

[0016] The first piston divides the first cylinder barrel into first piston cavity and second piston cavity.

[0017] Further optimization: the second cylinder barrel assembly includes second cylinder barrel fixedly installed on the right outer wall of box body, second piston is slidably installed in the second cylinder barrel, the other end of second piston rod is fixedly connected with second piston, and fourth piston rod is fixedly connected on the end surface of second piston away from the box body.

[0018] The second piston divides the second cylinder barrel into third piston cavity and fourth piston cavity.

[0019] Further optimization: the first piston cavity and the third piston cavity are filled with lubricating medium, the first piston cavity and the third piston cavity are communicated through a conveying pipeline, and the buffer is connected in series on the conveying pipeline.

[0020] Further optimization: the second piston cavity and the fourth piston cavity are communicated through a recovery pipeline, and the liquid accumulator is connected in series on the recovery pipeline.

[0021] The utility model discloses adopt the above technical scheme, clever design, reasonable structure can adopt mechanical hydraulic linkage reciprocating drive mode in the conveying of liquid, guarantee liquid conveying process steady, and impact force is small, and maintenance is convenient, and the whole structure design is simple, reduces design research and development cost, and facilitates use.

[0022] Through eccentric wheel rotation, reciprocating motion is realized, is transmitted to the working cylinder assembly to ensure that the working cylinder assembly completes the extraction and transportation of the conveying medium, and the buffer is arranged on the first cylinder barrel and the second cylinder barrel in the reciprocating drive device to ensure stable operation when reciprocating, reduce impact force, prolong the service life of the device, and improve the conveying efficiency.

[0023] The utility model is further illustrated below in connection with the drawings and examples. DRAWINGS

[0024] Figure 1 It is the schematic diagram of the whole structure in the embodiment of the utility model;

[0025] Figure 2 It is the internal structure schematic diagram of reciprocating drive device in the embodiment of the utility model;

[0026] Figure 3 It is the structure schematic diagram of working cylinder assembly in the embodiment of the utility model;

[0027] Figure 4 It is the structure schematic diagram of power device in the embodiment of the utility model.

[0028] In the diagram: 1. Base; 2. Reciprocating drive device; 21. Mounting seat; 22. Housing assembly; 220. Housing; 2201. Oil inlet; 2202. Oil window; 2203. Oil outlet; 221. Drive shaft; 222. Eccentric wheel; 223. First roller; 224. First piston rod; 225. Second roller; 226. Second piston rod; 23. First cylinder assembly; 230. First cylinder; 231. First piston; 232. Third piston. 24. Rod; 240. Second cylinder assembly; 241. Second cylinder; 242. Second piston; 243. Fourth piston rod; 25. Buffer; 26. Delivery pipeline; 27. Lubricating medium; 28. Recovery pipeline; 29. ​​Liquid reservoir; 3. Working cylinder assembly; 31. Left cylinder; 32. Left piston; 33. Right cylinder; 34. Right piston; 35. Delivery medium; 4. Power unit; 41. Motor; 42. Reducer; 43. Coupling; 5. Control cabinet. Detailed Implementation

[0029] like Figures 1-4 As shown: A mechanical-hydraulic linkage reciprocating drive fluid conveying device includes a base 1, a reciprocating drive device 2 is fixedly installed on the base 1 near the middle position, the left and right ends of the reciprocating drive device 2 are connected to the same set of working cylinder assemblies 3, a power device 4 is also provided on the base 1 near the reciprocating drive device 2, the power output end of the power device 4 is connected to the reciprocating drive device 2 in a transmission connection, and a control cabinet 5 is fixedly installed on the base 1 near the edge position.

[0030] The reciprocating drive device 2 includes a mounting base 21 fixedly mounted on the base 1, a housing assembly 22 fixedly mounted on the mounting base 21, a first cylinder assembly 23 connected to the left end of the housing assembly 22, and a second cylinder assembly 24 connected to the right end of the housing assembly 22.

[0031] A buffer 25 and a reservoir 29 are connected between the first cylinder assembly 23 and the second cylinder assembly 24.

[0032] The housing assembly 22 includes a housing 220 fixedly installed on the base 1. The upper end of the housing 220 is connected to an oil inlet 2201, through which lubricating oil can be added into the housing 220.

[0033] An oil window 2202 is provided on one side of the housing 220. The oil window 2202 is made of transparent acrylic sheet to facilitate observation of the lubricating oil level inside the housing 220.

[0034] An oil outlet 2203 is provided on the upper part of the housing 220 near the lower end. After use, the lubricating oil in the housing 220 is released through the oil outlet 2203, saving resources.

[0035] The transmission shaft 221 is rotatably installed in the box 220, and one end of the transmission shaft 221 penetrates the inner wall of the box 220 and is fixedly connected with the power output end of the power device 4.

[0036] Mechanical seals are arranged at the connection positions of the transmission shaft 221 and the box 220, which are not marked in the figure. The mechanical seals can be obtained in the market, and the sealing principle is known, which will not be described here.

[0037] The eccentric wheel 222 is fixedly installed on the outer surface of the transmission shaft 221, and the eccentric wheel 222 is located in the box 220 and rotates eccentrically under the rotation of the transmission shaft 221.

[0038] The first piston rod 224 is slidably installed on the left inner wall of the box 220 and is perpendicular to the transmission shaft 221. The first piston rod 224 is fixedly connected with the first roller 223 at one end close to the transmission shaft 221, and the first roller 223 is in contact with the eccentric wheel 222.

[0039] The second piston rod 226 is slidably installed on the right inner wall of the box 220 and is perpendicular to the transmission shaft 221. The second piston rod 226 is fixedly connected with the second roller 225 at one end close to the transmission shaft 221, and the second roller 225 is in contact with the eccentric wheel 222.

[0040] In this way, when the eccentric wheel 222 rotates eccentrically, the first roller 223 and the second roller 225 are respectively pushed to move, so as to respectively push the first piston rod 224 and the second piston rod 226 to move.

[0041] The lubricating oil in the box 220 can lubricate the eccentric wheel 222, the first roller 223 and the second roller 225, reduce the friction when the eccentric wheel 222 respectively contacts with the first roller 223 and the second roller 225, reduce the wear and improve the precision.

[0042] The first cylinder assembly 23 comprises a first cylinder 230 fixedly installed on the left outer wall of the box 220.

[0043] The first piston 231 is slidably installed in the first cylinder 230, and the other end of the first piston rod 224 penetrates the box 220 and extends into the first cylinder 230 to be fixedly connected with the first piston 231.

[0044] The third piston rod 232 is fixedly connected to the other end surface of the first piston 231 and penetrates the outer wall of the first cylinder 230.

[0045] The first piston 231 divides the first cylinder 230 into a first piston cavity and a second piston cavity, the first piston cavity is away from the box 220, and the second piston cavity is close to the box 220.

[0046] The second cylinder assembly 24 comprises a second cylinder 240 fixedly installed on the right outer wall of the box 220, and a second piston 241 slidably installed in the second cylinder 240.

[0047] The other end of the second piston rod 226 extends through the box 220 and is fixedly connected with the second piston 241 in the second cylinder 240.

[0048] The fourth piston rod 242 is fixedly connected to the end of the second piston 241 away from the box 220, and penetrates the second cylinder 240.

[0049] The second piston 241 divides the second cylinder 240 into a third piston cavity and a fourth piston cavity, the third piston cavity is away from the box 220, and the fourth piston cavity is close to the box 220.

[0050] The first piston cavity and the third piston cavity are both filled with lubricating medium 27.

[0051] The first piston cavity and the third piston cavity are communicated through the conveying pipeline 26, and the buffer 25 is connected in series on the conveying pipeline 26.

[0052] Dynamic seals are arranged at the connection positions of the first piston rod 224 and the second piston rod 226 with the box 220, so as to avoid leakage of lubricating oil.

[0053] In the embodiment, the buffer 25 can be obtained on the market, which is a device for absorbing, reducing or eliminating impact, vibration and energy. A hydraulic buffer is selected to absorb impact energy through the damping effect of liquid. The specific implementation structure and principle are known in the prior art, and will not be described here.

[0054] When the eccentric wheel 222 is driven to rotate eccentrically by the transmission shaft 221, the first piston 231 and the second piston 241 are driven to move alternately left and right, so that the volumes of the first piston cavity, the third piston cavity, the second piston cavity and the fourth piston cavity are alternately changed. When the volume of the third piston cavity decreases, the lubricating medium 27 in the third piston cavity enters the first lubricating cavity through the conveying pipeline 26 and the buffer 25, so as to increase the volume of the first piston cavity and drive the first piston 231 to move towards the box 220, and then drive the first roller 223 to move towards the eccentric wheel 222 until the first roller 223 is in contact with the eccentric wheel 222 again. This cycle is repeated.

[0055] During this period, the pressure of the lubricating medium 27 just entering the conveying pipeline 26 is large, and the impact force is strong. After passing through the buffer 25, the lubricating medium 27 is transported smoothly, and the impact damage to the parts is reduced.

[0056] The second piston cavity and the fourth piston cavity are communicated through a recovery pipeline 28, and the liquid accumulator 29 is connected in series on the recovery pipeline 28.

[0057] In operation, when the first piston 231 and the second piston 241 leak the lubricating medium 27 due to damage, the leaked lubricating medium 27 enters the liquid accumulator 29 through the recovery pipeline 28, and when accumulated lubricating medium 27 is found in the liquid accumulator 29, the first piston 231 or the second piston 241 is repaired, facilitating quick confirmation of a repair point and improving use efficiency.

[0058] In this embodiment, the liquid accumulator 29 is a common container capable of storing liquid, is provided with a transparent window, and can be used to observe the storage condition of the liquid accumulator 29 in real time, and can be obtained on the market.

[0059] As shown in Figure 3 The working cylinder assembly 3 includes a left cylinder barrel 31 fixedly installed at one end of the first cylinder barrel 230, and a left piston 32 slidingly connected in the left cylinder barrel 31.

[0060] The third piston rod 232 extends to the left cylinder barrel 31 through the inner wall of the first cylinder barrel 230 and is fixedly connected with the left piston 32.

[0061] The second cylinder barrel 240 is fixedly installed with a right cylinder barrel 33 at one end, and a right piston 34 is slidingly connected in the right cylinder barrel 33.

[0062] The fourth piston rod 242 extends to the right cylinder barrel 33 through the inner wall of the second cylinder barrel 240 and is fixedly connected with the right piston 34.

[0063] In this way, when the first piston 231 and the second piston 241 move, the left piston 32 and the right piston 34 can be driven to move by the third piston rod 232 and the fourth piston rod 242, respectively.

[0064] The left piston 32 and the inner wall of the left cylinder barrel 31 away from the box body 220 are provided as a first conveying cavity, and the right piston 34 and the inner wall of the right cylinder barrel 33 away from the box body 220 are provided as a second conveying cavity.

[0065] With the movement of the left piston 32 and the right piston 34, the volumes of the first conveying cavity and the second conveying cavity change.

[0066] The first conveying cavity and the second conveying cavity are both filled with a conveying medium 35 to be conveyed.

[0067] The left cylinder 31 and the right cylinder 33 are respectively provided with inlet and outlet at the positions where they communicate with the first conveying chamber and the second conveying chamber. When the volume of the first conveying chamber increases and the pressure decreases, the conveying medium 35 is drawn in from the inlet and fills the first conveying chamber. At this time, the volume of the second conveying chamber decreases and the pressure increases, so the conveying medium 35 in the second conveying chamber is output through the outlet, thus realizing alternating conveying.

[0068] In this embodiment, a one-way valve is installed on both the inlet and outlet pipelines to ensure that when the inlet is being washed, the transport medium 35 in the outlet pipeline is drawn back. The installation methods of the one-way valves are known and will not be described in detail here.

[0069] like Figure 4 As shown, the power unit 4 includes a motor 41 fixedly mounted on the base 1. The power output end of the motor 41 is connected to a reducer 42 via a coupling 43. The power output end of the reducer 42 is connected to a drive shaft 221. With this design, when the motor 41 starts, it can drive the drive shaft 221 to rotate.

[0070] The motor 41, coupling 43 and reducer 42 are all commercially available, and their driving principles are well known, so they will not be described in detail here.

[0071] The control cabinet 5 is equipped with a control system for controlling the operation of the conveying device. The control terminal of the motor 41 is electrically connected to the control system via a wire, making operation convenient.

[0072] For those skilled in the art, any changes, modifications, substitutions, and variations made to the embodiments based on the teachings of this utility model, without departing from the principles and spirit of this utility model, still fall within the protection scope of this utility model.

Claims

1. A reciprocating fluid conveying device driven by a mechanical-hydraulic linkage, comprising a base (1), characterized in that: The base (1) is fixedly installed with a reciprocating driving device (2) near the middle position, and a same group of working cylinder assemblies (3) are communicated with the left and right ends of the reciprocating driving device (2), and a power device (4) is further arranged on the base (1) near the reciprocating driving device (2), the power output end of the power device (4) is in transmission connection with the reciprocating driving device (2), and a control cabinet (5) is fixedly installed on the base (1) near the edge position. The reciprocating driving device (2) comprises a mounting seat (21) fixedly installed on the base (1), and a box body assembly (22) is fixedly installed on the mounting seat (21), a first cylinder barrel assembly (23) is communicated with the left end of the box body assembly (22), and a second cylinder barrel assembly (24) is communicated with the right end of the box body assembly (22). The first cylinder barrel assembly (23) and the second cylinder barrel assembly (24) are communicated with a buffer (25) and a liquid accumulator (29).

2. A fluid delivery device according to claim 1, wherein: The box body assembly (22) comprises a box body (220) fixedly installed on the base (1), a transmission shaft (221) is rotatably installed in the box body (220), one end of the transmission shaft (221) penetrates through the inner wall of the box body (220) and is fixedly connected with the power output end of the power device (4), and an eccentric wheel (222) is fixedly installed on the outer surface of the transmission shaft (221).

3. A fluid delivery device according to claim 2, wherein: The left side inner wall of the box body (220) is slidably installed with a first piston rod (224), the first piston rod (224) is perpendicular to the transmission shaft (221), one end of the first piston rod (224) near the transmission shaft (221) is fixedly installed with a first roller (223), and the first roller (223) is in top contact with the eccentric wheel (222).

4. A fluid delivery device according to claim 3, wherein: The right side inner wall of the box body (220) is slidably installed with a second piston rod (226), the second piston rod (226) is perpendicular to the transmission shaft (221), one end of the second piston rod (226) near the transmission shaft (221) is fixedly installed with a second roller (225), and the second roller (225) is in top contact with the eccentric wheel (222).

5. A fluid delivery device according to claim 4, wherein: The first cylinder barrel assembly (23) comprises a first cylinder barrel (230) fixedly installed on the left side outer wall of the box body (220), a first piston (231) is slidably installed in the first cylinder barrel (230), the other end of the first piston rod (224) is fixedly connected with the first piston (231), and a third piston rod (232) is fixedly connected to the other end surface of the first piston (231). The first piston (231) divides the first cylinder barrel (230) into a first piston cavity and a second piston cavity.

6. A fluid delivery device according to claim 5, wherein: The second cylinder barrel assembly (24) comprises a second cylinder barrel (240) fixedly installed on the right side outer wall of the box body (220), a second piston (241) is slidably installed in the second cylinder barrel (240), the other end of the second piston rod (226) is fixedly connected with the second piston (241), and a fourth piston rod (242) is fixedly connected to the end surface of the second piston (241) away from the box body (220). The second piston (241) divides the second cylinder barrel (240) into a third piston cavity and a fourth piston cavity.

7. A fluid delivery device according to claim 6, wherein: The first piston cavity and the third piston cavity are filled with a lubricating medium (27), the first piston cavity and the third piston cavity are communicated through a delivery pipeline (26), and a buffer (25) is connected in series on the delivery pipeline (26).

8. A hydro-mechanical link reciprocating drive fluid delivery device as claimed in claim 7, wherein: The second piston cavity and the fourth piston cavity are communicated through a recovery pipeline (28), and a liquid accumulator (29) is connected in series on the recovery pipeline (28).

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