A double cylinder double-acting hydraulic hose diaphragm pump

Abstract

The utility model discloses a double cylinder double -action hydraulic hose diaphragm pump, aims at providing a kind of double cylinder double -action hydraulic hose diaphragm pump of high -efficient, stable, low -loss medium delivery, and its technical scheme main points are including the mounting bracket for fixing overall structure, be equipped with hydraulic device on the mounting bracket, the drive device for driving hydraulic device reciprocating and the control system for controlling drive device operating state and monitoring hydraulic device pressure, the hydraulic device includes the hydraulic end being symmetrically arranged on mounting bracket and the hose diaphragm subassembly being cooperated with hydraulic end, the hydraulic end is equipped with two parallelly arranged cylinder, the plunger of through cylinder, the piston ring on the plunger in the channel between two cylinder and the plunger sheath being equipped with one end, the stroke distance of the plunger is 0.8-0.95 times of the cylinder bore, and the diameter of piston ring operating channel is 0.5-0.8 times of the cylinder height. The utility model is applicable to diaphragm pump technical field.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and more specifically, to a double-cylinder double-acting hydraulic hose diaphragm pump. Background Technology

[0002] In the field of industrial fluid transportation, pumps are widely used as key power devices in various industries such as chemical, municipal, and mining. Traditional reciprocating pumps (such as plunger pumps and piston pumps) have high pressure output capabilities, but they have significant drawbacks: their pistons or plungers are in direct contact with the transported medium, making them prone to seal failure due to medium corrosion and wear. This not only increases maintenance frequency and costs but may also lead to safety accidents due to leaks, especially when transporting highly corrosive, high-viscosity, or particulate media.

[0003] The emergence of diaphragm pumps has alleviated the above problems to some extent. By isolating the power end from the hydraulic end through an elastic diaphragm, it avoids direct corrosion of the power components by the medium. However, existing single-cylinder diaphragm pumps have the disadvantage of large flow pulsation, which can easily lead to pipeline vibration and pressure fluctuations in high-precision conveying scenarios, affecting system stability. On the other hand, ordinary hydraulically driven diaphragm pumps often suffer from problems such as diaphragm fatigue damage and narrow flow adjustment range due to uneven diaphragm stress and insufficient hydraulic oil control precision, making it difficult to meet the requirements of high flow, high pressure and continuous stable operation. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a double-cylinder double-acting hydraulic hose diaphragm pump that can achieve efficient, stable and low-loss medium transportation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-cylinder, double-acting hydraulic hose diaphragm pump, comprising a mounting bracket for fixing the overall structure, wherein the mounting bracket is provided with a hydraulic device, a drive device for driving the reciprocating motion of the hydraulic device, and a control system for controlling the operating state of the drive device and monitoring the pressure of the hydraulic device. The hydraulic device includes a hydraulic end symmetrically arranged on the mounting bracket and a hose diaphragm assembly cooperating with the hydraulic end. The hydraulic end is provided with two parallel cylinders, a plunger penetrating the cylinder, a piston ring on the plunger located in the channel between the two cylinders, and a plunger sleeve provided at one end. The stroke distance of the plunger is 0.8-0.95 times the inner diameter of the cylinder, and the diameter of the piston ring running channel is 0.5-0.8 times the height of the cylinder. The plunger adopts a rod structure at both ends to ensure that the volume change of the left and right cylinders is consistent, thereby optimizing and reducing the flow pulsation rate.

[0006] The present invention is further configured such that: the hose diaphragm assembly includes a diaphragm body disposed on one side of the hydraulic end, a working chamber disposed within the diaphragm body, a hose diaphragm that divides the working chamber into a hydraulic side and a medium side, and an inlet and an outlet disposed at both ends of the diaphragm body.

[0007] The present invention is further configured such that: the driving device includes a motor, a worm gear, a double eccentric wheel shaft, a crank, a connecting rod, and a crosshead for connecting the plunger; the motor drives the double eccentric wheel shaft to rotate after being reduced in speed by the worm gear; the rotational motion of the double eccentric wheel shaft is converted into the reciprocating motion of the crosshead through the crank and connecting rod.

[0008] The present invention is further configured such that: the hydraulic device is also provided with a dual exhaust device, the dual exhaust device including a safety valve disposed at the upper end of the cylinder body and an air release valve disposed at the upper end of the diaphragm cavity.

[0009] The present invention is further configured such that: a lower pressure adjustable limit oil replenishment device is provided at the lower end of the hydraulic end; when the hydraulic chamber provided in the hydraulic end has a vacuum of 80%, the oil replenishment valve automatically replenishes oil into the hydraulic chamber to ensure that the hydraulic chamber is full.

[0010] The present invention is further configured such that a double-tube horizontal buffer is provided between the two hydraulic ends for buffering the slurry during the conveying process to reduce pulsation.

[0011] The present invention is further configured such that: a one-way valve and a valve seat for installing the one-way valve are provided between the membrane cavity and the hydraulic end; the upper surface of the valve seat adopts a sloping anti-settling structure to prevent slurry from accumulating on the upper surface of the valve seat.

[0012] The beneficial effects of this utility model are:

[0013] 1. The efficient coordination between the drive unit and the hydraulic system, coupled with the control system's precise control of the drive unit's operating status and real-time monitoring of the hydraulic system's pressure, ensures the pump is always in optimal working condition. It allows for flexible adjustment of operating parameters according to actual needs, avoiding energy waste, and precise control of pressure and flow to meet operational requirements under different working conditions, thus improving work efficiency. The two parallel cylinders in the hydraulic end, the plunger penetrating the cylinders, and the piston rings and plunger sleeves on the plunger located in the channel between the two cylinders work together to form a tight working system. The piston rings and plunger sleeves provide excellent sealing and protection, reducing hydraulic oil leakage, lowering the failure rate, enhancing the overall reliability of the pump, and reducing maintenance costs and downtime. The plunger stroke distance is set to 0.8-0.95 times the cylinder's inner diameter, ensuring effective cylinder volume utilization while avoiding problems such as excessive plunger inertia and increased energy consumption due to excessive stroke, achieving efficient media delivery and improving pump efficiency. The diameter of the piston ring running channel is 0.5-0.8 times the cylinder height. This provides sufficient space for the piston ring to move, ensuring the stable performance of its sealing function, while avoiding a decrease in the strength of the cylinder structure caused by an excessively large channel. This ensures the structural stability of the cylinder and further improves the reliability of the hydraulic end operation.

[0014] 2. The flexible diaphragm inside the chamber divides the working chamber into a hydraulic side and a media side, achieving complete isolation between the hydraulic oil and the conveyed medium. This effectively avoids cross-contamination and significantly improves the purity of the conveyed medium, making it particularly suitable for scenarios with stringent requirements for media cleanliness. Furthermore, the inlet and outlet are directly mounted at both ends of the chamber, forming a straight channel, optimizing the liquid flow path, reducing flow resistance, improving conveying efficiency, and reducing media residue within the chamber. The motor drives the double eccentric wheel shaft to rotate via a worm gear reduction system. This transmission structure ensures the stability and reliability of power transmission, providing sufficient output torque and effectively preventing jamming and insufficient power during operation. In addition, the rotational motion of the double eccentric wheel shaft is converted into the reciprocating motion of the crosshead through a crank and connecting rod mechanism. This smooth motion transition significantly reduces vibration and noise during equipment operation, extending the equipment's service life. The overall structure is compact, with low space occupancy, facilitating installation and maintenance, and effectively reducing operating costs.

[0015] 3. The safety valve at the top of the cylinder can open in time to relieve pressure when the internal pressure of the hydraulic device rises abnormally, preventing equipment damage due to overpressure and ensuring the safe operation of the system. The vent valve at the top of the diaphragm chamber can conveniently discharge gas from the diaphragm chamber, preventing gas from affecting the efficiency and stability of medium transportation and ensuring smooth operation of the device. The lower-mounted pressure-adjustable limit oil replenishment device at the bottom of the hydraulic end is a major highlight. When the hydraulic chamber at the hydraulic end reaches 80% vacuum, the oil replenishment valve will automatically replenish oil into the hydraulic chamber, ensuring that the hydraulic chamber is always fully filled. This effectively avoids problems such as insufficient power transmission and abnormal equipment operation caused by insufficient oil in the hydraulic chamber, further improving the stability and reliability of the device operation and reducing maintenance costs and downtime losses caused by oil shortage failures.

[0016] 4. A double-connected flexible hose horizontal buffer installed between the two hydraulic ends provides excellent buffering during slurry transport, effectively reducing pulsation. This not only reduces the impact of pulsation on pipelines and equipment components, extending their service life, but also ensures smoother slurry transport, stable delivery volume, and improved overall transport efficiency. A one-way valve and valve seat are installed between the membrane chamber and the hydraulic end. The one-way valve effectively prevents backflow of the medium, ensuring the accuracy of the transport direction. The sloping anti-settling structure on the upper surface of the valve seat guides the slurry, preventing slurry accumulation on the upper surface and reducing problems such as valve seat blockage and poor one-way valve opening and closing caused by accumulation. This reduces the frequency of equipment cleaning and maintenance, ensuring continuous and stable operation of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the hydraulic end;

[0020] Figure 1-3 Reference numerals: 1. Mounting bracket; 2. Hydraulic end; 3. Cylinder body; 4. Plunger protective sleeve; 5. Piston ring; 6. Plunger; 7. Diaphragm chamber; 8. Working chamber; 9. Hose diaphragm; 10. Inlet; 11. Outlet; 12. Motor; 13. Double-connected hose horizontal buffer; 14. Double eccentric wheel shaft; 15. Limiting oil replenishment device; 16. Vent valve; 17. Crosshead; 18. Safety valve. Detailed Implementation

[0021] Reference Figures 1 to 3 The embodiments of this utility model will be further described below.

[0022] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0024] Figures 1 to 3The illustrated dual-cylinder, double-acting hydraulic hose diaphragm pump includes a mounting bracket 1 for fixing the overall structure. The mounting bracket 1 is equipped with a hydraulic device, a drive device for driving the reciprocating motion of the hydraulic device, and a control system for controlling the operating status of the drive device and monitoring the pressure of the hydraulic device. The efficient cooperation between the drive device and the hydraulic device, coupled with the precise control of the drive device's operating status and the real-time monitoring of the hydraulic device's pressure by the control system, ensures that the pump is always in optimal working condition. This allows for flexible adjustment of operating parameters according to actual needs, avoiding energy waste, and precise control of pressure and flow rate, meeting the operational requirements under different working conditions and improving work efficiency. The hydraulic device includes a hydraulic end 2 symmetrically arranged on the mounting bracket 1 and a hose diaphragm assembly that cooperates with the hydraulic end 2. The hydraulic end 2 contains two parallel cylinders 3, a plunger 6 penetrating the cylinder 3, a piston ring 5 on the plunger 6 located in the channel between the two cylinders 3, and a plunger 6 sleeve at one end. The two parallel cylinders 3, coupled with the plunger 6 penetrating the cylinder 3, and the piston ring 5 on the plunger 6 located in the channel between the two cylinders 3, enhance the sealing between the plunger 6 and the cylinder 3, reducing media leakage. The plunger 6 sleeve at one end protects the plunger 6, reduces wear, and extends its service life. Most importantly, the plunger 6 adopts a rod structure at both ends, ensuring consistent volume changes between the left and right cylinders 3, further optimizing and reducing flow pulsation, making media delivery more stable, and improving pump performance. The stroke distance of the plunger 6 is 0.8-0.95 times the inner diameter of the cylinder 3. While ensuring the effective volume utilization of the cylinder 3, it avoids problems such as excessive inertia and increased energy consumption caused by excessive stroke of the plunger 6. This achieves efficient medium transportation, improves the working efficiency of the pump, and avoids the reduction in medium transportation volume and direct decrease in pump working efficiency caused by insufficient stroke. Furthermore, the diameter of the piston ring 5's running channel is 0.5-0.8 times the height of the cylinder 3. This provides sufficient movement space for the piston ring 5, ensuring the stable performance of its sealing function and guaranteeing the structural stability of the cylinder 3. This further improves the reliability of the hydraulic end 2's operation, avoiding the decrease in structural strength of the cylinder 3 caused by an excessively large channel, and also avoiding the situation where the piston ring 5 cannot fully unfold and fit against the cylinder 3 wall due to an insufficiently small channel, which would reduce its sealing performance and lead to leakage of hydraulic oil or the transported medium.

[0025] The hose diaphragm assembly includes a diaphragm body disposed on one side of the hydraulic end 2, a working chamber 8 disposed within the diaphragm body, a hose diaphragm 9 dividing the working chamber 8 into a hydraulic side and a medium side, and an inlet 10 and an outlet 11 disposed at both ends of the diaphragm body. The hose diaphragm 9 disposed within the diaphragm body divides the working chamber 8 into a hydraulic side and a medium side, achieving complete isolation between the hydraulic oil and the conveyed medium, effectively avoiding cross-contamination, and significantly improving the purity of the conveyed medium. It is especially suitable for scenarios with stringent requirements for the cleanliness of the medium. Moreover, the inlet 10 and outlet 11 are directly installed at both ends of the diaphragm body, forming a straight channel, optimizing the liquid flow path, reducing flow resistance, not only improving the conveying efficiency but also reducing the amount of medium residue in the cavity.

[0026] The drive unit includes a motor 12, a worm gear, a double eccentric shaft 14, a crank, a connecting rod, and a crosshead 17 for connecting the plunger 6. The motor 12 drives the double eccentric shaft 14 to rotate after being reduced in speed by the worm gear. This transmission structure ensures the stability and reliability of power transmission, providing sufficient output torque and effectively avoiding jamming and insufficient power during operation. Furthermore, the rotational motion of the double eccentric shaft 14 is converted into the reciprocating motion of the crosshead 17 through the crank and connecting rod mechanism. This smooth motion conversion significantly reduces vibration and noise during equipment operation, thus extending the equipment's service life. The overall structure is compact, with low space occupancy, facilitating installation and maintenance, and effectively reducing operating costs.

[0027] The hydraulic device is also equipped with a dual exhaust system, which includes a safety valve 18 located at the upper end of the cylinder 3 and a vent valve 16 located at the upper end of the diaphragm chamber 7. The safety valve 18 located at the upper end of the cylinder 3 can open in time to relieve pressure when the internal pressure of the hydraulic device rises abnormally, so as to avoid equipment damage due to overpressure and ensure the safe operation of the system. The vent valve 16 located at the upper end of the diaphragm chamber 7 can conveniently discharge the gas in the diaphragm chamber 7, so as to prevent the gas from affecting the efficiency and stability of the medium transportation and ensure the smooth operation of the device.

[0028] The lower end of the hydraulic end 2 is equipped with a lower-positioned pressure adjustable limit oil replenishment device 15. When the hydraulic chamber in the hydraulic end 2 reaches 80% vacuum, the oil replenishment valve will automatically replenish oil into the hydraulic chamber to ensure that the hydraulic chamber is always fully filled. This effectively avoids problems such as insufficient power transmission and abnormal equipment operation caused by lack of oil in the hydraulic chamber, further improving the stability and reliability of the device operation and reducing maintenance costs and downtime losses caused by lack of oil.

[0029] A double-tube horizontal buffer 13 is also provided between the two hydraulic ends 2 to buffer the slurry during the conveying process and reduce pulsation. It can play a good buffering role during the slurry conveying process, effectively reduce the pulsation phenomenon during conveying, not only reduce the impact of pulsation on pipelines and equipment components and extend the service life of pipelines and equipment, but also make the slurry conveying more stable, ensure the stability of the conveying volume, and improve the overall conveying effect.

[0030] A one-way valve and a valve seat for installing the one-way valve are provided between the membrane cavity 7 and the hydraulic end 2. The one-way valve can effectively prevent the backflow of the medium and ensure the accuracy of the conveying direction. The inclined anti-sedimentation structure adopted on the upper surface of the valve seat can avoid the slurry from accumulating on the upper surface of the valve seat by means of the guiding effect of the slope, reducing problems such as valve seat blockage and poor opening and closing of the one-way valve caused by accumulation, reducing the frequency of equipment cleaning and maintenance, and ensuring the continuous and stable operation of the device.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-cylinder, double-acting hydraulic hose diaphragm pump, comprising a mounting bracket (1) for fixing the overall structure, characterized in that, The mounting bracket (1) is equipped with a hydraulic device, a drive device for driving the reciprocating motion of the hydraulic device, and a control system for controlling the operating status of the drive device and monitoring the pressure of the hydraulic device. The hydraulic device includes a hydraulic end (2) symmetrically arranged on the mounting bracket (1) and a hose diaphragm assembly that cooperates with the hydraulic end (2). The hydraulic end (2) is equipped with two parallel cylinders (3), a plunger (6) penetrating the cylinder (3), a piston ring (5) on the plunger (6) located in the channel between the two cylinders (3), and a plunger (6) sleeve provided at one end. The stroke distance of the plunger (6) is 0.8-0.95 times the inner diameter of the cylinder (3), and the diameter of the piston ring (5) running channel is 0.5-0.8 times the height of the cylinder (3). The plunger (6) adopts a rod structure at both ends to ensure that the volume change of the left and right cylinders (3) is consistent and to optimize and reduce the flow pulsation rate.

2. The double-cylinder double-acting hydraulic hose diaphragm pump according to claim 1, characterized in that, The hose diaphragm assembly includes two diaphragm bodies disposed on one side of the hydraulic end (2), a working chamber (8) disposed within the diaphragm body, a hose diaphragm (9) that divides the working chamber (8) into a hydraulic side and a medium side, and an inlet (10) and an outlet (11) disposed at both ends of the diaphragm body.

3. The double-cylinder double-acting hydraulic hose diaphragm pump according to claim 1, characterized in that, The drive device includes a motor (12), a worm gear, a double eccentric shaft (14), a crank, a connecting rod, and a crosshead (17) for connecting the plunger (6). The motor (12) drives the double eccentric shaft (14) to rotate after being reduced in speed by the worm gear. The rotational motion of the double eccentric shaft (14) is converted into the reciprocating motion of the crosshead (17) through the crank and connecting rod.

4. A double-cylinder, double-acting hydraulic hose diaphragm pump according to claim 2, characterized in that, The hydraulic device is also equipped with a dual exhaust device, which includes a safety valve (18) located at the upper end of the cylinder (3) and an exhaust valve (16) located at the upper end of the diaphragm cavity (7).

5. A double-cylinder, double-acting hydraulic hose diaphragm pump according to claim 1, characterized in that, The lower end of the hydraulic end (2) is provided with a lower pressure adjustable limit oil replenishment device (15). When the hydraulic chamber provided in the hydraulic end (2) has an 80% vacuum, the oil replenishment valve automatically replenishes oil into the hydraulic chamber to ensure that the hydraulic chamber is full.

6. A double-cylinder, double-acting hydraulic hose diaphragm pump according to claim 1, characterized in that, A double-tube horizontal buffer (13) is also provided between the two hydraulic ends (2) to buffer the slurry during the conveying process and reduce pulsation.

7. A double-cylinder, double-acting hydraulic hose diaphragm pump according to claim 2, characterized in that, A one-way valve and a valve seat for installing the one-way valve are provided between the membrane cavity (7) and the hydraulic end (2). The upper surface of the valve seat adopts a slope anti-settling structure to prevent slurry from accumulating on the upper surface of the valve seat.

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