Diaphragm pump structure

Abstract

The invention belongs to the technical field of fluid conveying hydraulic diaphragm pumps, and particularly relates to a diaphragm pump structure. The diaphragm pump structure is compact in structure and good in using effect. The device comprises a power end 1 and fluid ends 2, the power end 1 drives the fluid ends 2, and the device is characterized in that the power end 1 drives the multiple fluid ends 2 at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of fluid transport hydraulic diaphragm pumps, and in particular relates to a diaphragm pump structure. Background Art

[0002] The hydraulic diaphragm pump belongs to the category of reciprocating pumps for fluid transportation, and is used for long-distance pipeline transportation of solid-liquid two-phase media. Through the reciprocating motion of the piston on one side of the diaphragm, the diaphragm is driven to move to the front or rear end by the hydraulic oil, thereby driving the inlet valve and the discharge valve on the hydraulic end of the other side of the diaphragm to open and close alternately, thereby realizing reciprocating liquid inlet and discharge, thereby realizing medium transportation, and has a wide range of applications in metallurgy, mining, electric power, chemical industry and other industries.

[0003] At present, the hydraulic diaphragm pump field mainly includes three-cylinder single-acting diaphragm pumps, two-cylinder double-acting diaphragm pumps, four-cylinder / five-cylinder single-acting diaphragm pumps, and double diaphragm pumps driven by two three-cylinder single-acting diaphragm pumps through a set of motor reducers. Various pump types are used in different fields and different process systems, and meet the needs of the entire process system through pressure and flow as well as single or multiple units in parallel.

[0004] In the field of coal chemical industry, with the development and progress of coal gasification technology, China has digested and absorbed international advanced technology, and has independently developed and formed a multi-nozzle opposed water-coal slurry pressurized gasification technology with independent intellectual property rights, which has been verified and widely used in China. The multi-nozzle gasification technology adopts a four-nozzle opposed gasifier. The water-coal slurry is pressurized by a diaphragm pump and sprayed into the gasifier together with oxygen through four process nozzles symmetrically arranged on the same plane in the upper middle part of the gasification chamber of the gasifier to carry out chemical reactions to achieve coal gasification. According to the process requirements, the layout of the coal slurry pipe should be completely consistent with a pair of symmetrically arranged nozzle pipelines. Symmetrical nozzles require water-coal slurry with the same flow rate and pressure. Therefore, the transportation of water-coal slurry should try to use the corresponding symmetrical nozzles of a single diaphragm pump to ensure the consistency of flow pressure. However, the transportation of multiple pumps will inevitably cause flow pressure fluctuations, which will affect the gasification efficiency. With the update of technology, a single diaphragm pump corresponding to a single four-nozzle opposed gasifier will become a development trend. This configuration will ensure the stability of the flow pressure of the water-coal slurry transported by the diaphragm pump into the gasifier, improve gasification efficiency and reduce costs.

[0005] In addition, in other application fields, due to the mismatch between pressure and flow, there is no specially matched pump type in the field of large flow and medium and low pressure, and multiple diaphragm pumps need to be connected in parallel to achieve parameter matching for conveying slurry. Therefore, a large flow and medium and low pressure hydraulic diaphragm pump is needed to complete the medium transportation in an energy-saving and efficient manner. Summary of the invention

[0006] The present invention aims at solving the above problems and provides a diaphragm pump structure with compact structure and good use effect.

[0007] To achieve the above purpose, the present invention adopts the following technical solution. The present invention includes a power end 1 and a hydraulic end 2. The power end 1 drives the hydraulic end 2. The power end 1 is characterized in that the power end 1 drives multiple hydraulic ends 2 at the same time.

[0008] As a preferred solution, the multiple hydraulic ends 2 of the present invention are evenly distributed into two groups, and the two groups of hydraulic ends 2 are symmetrically arranged on both sides of the power end 1.

[0009] As another preferred embodiment, the hydraulic end 2 of the present invention includes a diaphragm chamber 18, and the power end 1 drives the diaphragms 19 in the multiple diaphragm chambers 18 of the diaphragm pump to change in concave and convex manner.

[0010] As another preferred embodiment, the multiple diaphragm chambers 18 of the present invention are divided into multiple diaphragm chamber groups, each diaphragm chamber group corresponds to a discharge port, and the discharge flow rates of the discharge ports are the same.

[0011] As another preferred embodiment, the present invention further comprises a feed compensation part 3, and the feed compensation part 3 is connected to the feed port of the diaphragm pump.

[0012] As another preferred embodiment, the power end 1 of the present invention includes a transmission shaft assembly 6 , which is connected to a crosshead 9 via a connecting rod 8 , and the crosshead 9 is connected to one end of a piston rod 10 .

[0013] As another preferred solution, the other end of the piston rod 10 of the present invention is connected to the piston 26 inside the oil cylinder 23 of the hydraulic end 2.

[0014] As another preferred embodiment, the oil cylinder 23 described in the present invention includes an oil cylinder body 28, the inner wall of the oil cylinder body 28 is connected to a cylinder sleeve 27, a piston 26 is arranged in the cylinder sleeve 27, and the piston rod 10 passes through the piston 26 and is connected to the piston compensation rod 25; an oil cylinder cover 24 is arranged at the end of the oil cylinder body 28, an inner and outer flange 34 is arranged on the inner side of the oil cylinder cover 24, a positioning sleeve 29 and an intermediate pressure sleeve 30 are arranged on the inner side of the connecting inner and outer flange 34, the inner sides of the positioning sleeve 29 and the intermediate pressure sleeve 30 are connected to the outer wall of the piston compensation rod 25, an outer pressure sleeve 32 is arranged at the outer end of the intermediate pressure sleeve 30, and a piston rod sealing ring 31 is arranged between the intermediate pressure sleeve 30 and the outer pressure sleeve 32; diaphragm chamber connecting ports 36 are arranged on both sides of the oil cylinder body 28, and the piston 26 is placed between the two diaphragm chamber connecting ports 36.

[0015] As another preferred solution, the piston rod 10 and the piston compensation rod 25 described in the present invention have the same axial diameter.

[0016] As another preferred solution, the piston compensation rod 25 of the present invention is connected to the threaded hole of the piston rod 10 via an external thread.

[0017] As another preferred embodiment, the outer side of the outer pressure sleeve 32 of the present invention is covered with a shield 33, which is connected to the inner and outer flanges 34 via fasteners, and the contact end surfaces of the shield 33 and the inner and outer flanges 34 are provided with end cover sealing rings 35.

[0018] As another preferred embodiment, the connecting rod 8, crosshead 9 and piston rod 10 of the present invention are combined into four groups, which are arranged along the length direction of the transmission shaft assembly 6; two groups are arranged on each side of the transmission shaft assembly 6, which are arranged alternately.

[0019] As another preferred solution, a group of double-cylinder 23 and four-diaphragm chamber 18 hydraulic ends 2 are arranged on both sides of the power end 1 of the present invention, and each group of double-cylinder 23 and four-diaphragm chamber 18 hydraulic ends corresponds to a feed compensation part 3; each cylinder 23 corresponds to a piston rod 10, two diaphragm chambers 18, a feed pipe 16, two feed check valves 17, two discharge check valves 20, a discharge compensation part 21 and a discharge pipe 22;

[0020] One end of the diaphragm chamber 18 is connected to the feed check valve 17 , and the other end of the diaphragm chamber 18 is connected to the discharge check valve 20 ; the feed check valve 17 is connected to the feed pipe 16 , and the discharge check valve 20 is connected to the discharge pipe 22 through the discharge compensation part 21 .

[0021] As another preferred embodiment, the two discharge pipes 22 on the same side of the present invention extend toward the middle and are connected to the main discharge pipe 38 through the main discharge compensation portion 37 .

[0022] As another preferred solution, the transmission shaft assembly 6 of the present invention is fixed on the opposed housing 5, and the transmission shaft assembly 6 is fixed in the center by bearings 7 on both sides and bushings on both sides.

[0023] As another preferred embodiment, the transmission shaft assembly 6 of the present invention includes a transmission shaft 11, side eccentric wheels 12 are arranged on both sides of the transmission shaft 11, and an intermediate eccentric wheel 13 is arranged on the transmission shaft 11 between the side eccentric wheels 12. The transmission shaft 11 is connected to the side eccentric wheels 12 and the intermediate eccentric wheel 13 through a key 14. The two side eccentric wheels 12 are respectively connected to a connecting rod 8, and the two sides of the intermediate eccentric wheel 13 are respectively connected to a connecting rod 8; the two connecting rods 8 connected to the two side eccentric wheels 12 are placed on both sides of the transmission shaft 11, and the two connecting rods 8 connected to the intermediate eccentric wheel 13 are placed on both sides of the transmission shaft 11.

[0024] As another preferred scheme, the feed compensation part 3 described in the present invention includes a feed fork tube tank 48 and a feed flow compensation tank 49. The feed port is connected to the inlet of the feed flow compensation tank 49 on both sides through the feed fork tube tank 48, and the outlet of the feed flow compensation tank 49 is connected to the feed pipe 16.

[0025] Secondly, in the present invention, the phase angle between the connecting rod 8 connected to the first side eccentric wheel 12 and the connecting rod 8 on the first side of the adjacent intermediate eccentric wheel 13 is 270 degrees, the phase angle between the connecting rod 8 on the first side of the intermediate eccentric wheel 13 and the connecting rod 8 on the second side of the intermediate eccentric wheel 13 is 180 degrees, and the phase angle between the connecting rod 8 on the second side of the intermediate eccentric wheel 13 and the connecting rod 8 connected to the second side eccentric wheel 12 is 90 degrees.

[0026] In addition, the power input end of the power end 1 of the present invention is connected to the power output end of the motor deceleration power part 4 through a coupling.

[0027] The invention has beneficial effects.

[0028] The power end 1 of the present invention drives multiple hydraulic ends 2 at the same time, which is an overall layout structure type, compact structure, high integration, and good discharge consistency at the discharge port of the hydraulic end 2; it occupies a small space, has excellent energy-saving effect, high efficiency, and is suitable for large-scale coal chemical gasification processes.

[0029] The present invention is applicable to an opposed water-coal slurry gasification process, and each discharge port of the hydraulic end 2 can provide a water-coal slurry medium for the corresponding gasifier nozzle, thereby ensuring the consistency of the water-coal slurry medium flow and pressure of the opposed nozzle, thereby ensuring the stability of the pressure flow of the entire gasifier, realizing the configuration of one diaphragm pump corresponding to one gasifier, reducing the number of diaphragm pumps, improving stability, optimizing configuration, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the present invention is not limited to the following description.

[0031] Figure 1 It is the overall three-dimensional layout diagram of the present invention.

[0032] Figure 2 It is an overall side view of the present invention.

[0033] Figure 3 It is an overall top view of the present invention.

[0034] Figure 4 It is a layout diagram of the hydraulic end of the present invention and a partial sectional view of the diaphragm chamber.

[0035] Figure 5 It is a structural diagram of the four-crank double-acting power end of the present invention.

[0036] Figure 6 It is an appearance diagram of the four-crank double-acting power end of the present invention.

[0037] Figure 7 It is a structural diagram of the transmission shaft assembly of the present invention.

[0038] Figure 8It is a structural diagram of the series four-turn transmission shaft of the present invention.

[0039] Fig. 9 It is an appearance diagram of the tandem four-turn transmission shaft of the present invention.

[0040] Fig.10 yes Fig. 9 M-direction view.

[0041] Fig.11 It is a structural diagram of the oil cylinder of the present invention.

[0042] Fig.12 It is a top sectional view of the connection between the oil cylinder and the diaphragm chamber of the present invention.

[0043] Fig.13 It is a side sectional view of the connection between the oil cylinder and the diaphragm chamber of the present invention.

[0044] Fig.14 It is an overall three-dimensional layout diagram of another embodiment of the present invention.

[0045] Fig.15 It is an overall top view of another embodiment of the present invention.

[0046] Fig.16 It is an overall side view of another embodiment of the present invention.

[0047] Markings in the figure: 1 is the power end, 2 is the double-outlet hydraulic end, 3 is the feed compensation part, 4 is the motor deceleration power part, 5 is the opposed box, 6 is the four-turn transmission shaft assembly, 7 is the bearing, 8 is the connecting rod, 9 is the cross head, 10 is the piston rod, 11 is the transmission shaft, 12 is the eccentric wheels on both sides, 13 is the middle eccentric wheel, 14 is the key, 15 is the shaft sleeves on both sides, 16 is the feed pipe, 17 is the feed check valve, 18 is the diaphragm chamber, 19 is the diaphragm, 20 is the discharge check valve, 21 is the discharge compensation part, 22 is the discharge pipe, 23 is the oil cylinder , 24 is the cylinder cover, 25 is the piston compensation rod, 26 is the piston, 27 is the cylinder sleeve, 28 is the cylinder body, 29 is the positioning sleeve, 30 is the intermediate compression sleeve, 31 is the piston rod sealing ring, 32 is the outer compression sleeve, 33 is the shield, 34 is the connecting inner and outer flanges, 35 is the end cover sealing ring, 36 is the diaphragm chamber connection port, 37 is the total discharge compensation part, 48 is the feed fork tube tank, 49 is the feed flow compensation tank, 40 is the valve box valve cone valve seat part, 41 is the cylinder diaphragm guide rod part, 42 is the first bearing, 43 is the second bearing, and 44 is the flange.

[0048] Marks in the figure: i1, i2 holes represent feed ports, a, b, c, d represent different discharge ports. D represents the cylinder diameter of the piston sleeve, d represents the diameter of the piston rod and piston compensation rod, and L represents the piston stroke. DETAILED DESCRIPTION

[0049] As shown in the figure, the present invention includes a power end 1 with diaphragms 19 in multiple diaphragm chambers 18 driving a diaphragm pump with concave and convex changes. The multiple diaphragm chambers 18 are divided into multiple diaphragm chamber groups, each diaphragm chamber group corresponds to a discharge port, and the discharge flow rates of the discharge ports are the same.

[0050] The present invention drives the diaphragms 19 in multiple diaphragm chambers 18 of the diaphragm pump through a power end 1, each diaphragm chamber group corresponds to a discharge port, and the discharge flow rates of the discharge ports are the same; it is an overall layout structure type, with a compact structure, high integration, and good discharge consistency at the discharge port; it occupies a small space, has excellent energy-saving effects, and is highly efficient, and is suitable for large-scale coal chemical gasification processes.

[0051] The diaphragm pump further comprises a feed compensation part 3, which is connected to the feed port of the diaphragm pump and ensures that the feed slurry is sufficient and stable.

[0052] The power end 1 includes a transmission shaft assembly 6 , which is connected to a crosshead 9 via a connecting rod 8 , and the crosshead 9 is connected to one end of a piston rod 10 .

[0053] The other end of the piston rod 10 is connected to the piston 26 inside the oil cylinder 23 .

[0054] The oil cylinder 23 includes an oil cylinder body 28, the inner wall of the oil cylinder body 28 is connected to a cylinder sleeve 27, a piston 26 is arranged in the cylinder sleeve 27, and the piston rod 10 passes through the piston 26 and is connected to the piston compensation rod 25; an oil cylinder cover 24 is arranged at the end of the oil cylinder body 28, and an inner and outer flange 34 is arranged on the inner side of the oil cylinder cover 24, and a positioning sleeve 29 and an intermediate pressing sleeve 30 are arranged on the inner side of the connecting inner and outer flange 34, and the inner sides of the positioning sleeve 29 and the intermediate pressing sleeve 30 are connected to the outer wall of the piston compensation rod 25, and an outer pressing sleeve 32 is arranged on the outer end of the intermediate pressing sleeve 30, and a piston rod sealing ring 31 is arranged between the intermediate pressing sleeve 30 and the outer pressing sleeve 32; diaphragm chamber connecting ports 36 are arranged on both sides of the oil cylinder body 28, and the piston 26 is placed between the two diaphragm chamber connecting ports 36.

[0055] By machining a coaxial hole on the oil cylinder cover 24, the piston compensation rod 25 is connected to the threaded hole of the piston rod 10 through an external thread, and between the piston compensation rod 25 and the oil cylinder cover 24, the same parts as the sealing part of the piston rod 10 are added, including a positioning sleeve 29, an intermediate compression sleeve 30, a piston rod sealing ring 31, an external compression sleeve 32, and connecting inner and outer flanges 34. Through the assembly of the parts and the adjustment of the inner and outer sleeves, the piston compensation rod 25 is supported and sealed to prevent leakage of hydraulic oil.

[0056] The piston rod 10 has the same axial diameter as the piston compensation rod 25. The piston 26 is matched on both sides by using the same axial diameter piston rod compensation to ensure that the hydraulic oil space on both sides of the piston 26 is consistent, thereby ensuring the consistency of the amount of hydraulic oil discharged on both sides, thereby achieving the consistency of the medium flow at the outlet of the diaphragm pump; ensuring the stability of the flow pressure, achieving the equality of the flow on both sides of the piston 26, and meeting the fluctuation requirements of the gasifier for the water-coal slurry flow pressure.

[0057] The piston compensation rod 25 is connected to the threaded hole of the piston rod 10 via an external thread.

[0058] The outer side of the outer pressure sleeve 32 is covered with a shield 33 , which is connected to the inner and outer flanges 34 via fasteners, and the contact end surfaces of the shield 33 and the inner and outer flanges 34 are provided with end cover sealing rings 35 .

[0059] The protective cover 33 and the end cover seal ring 35 are added to the outside of the piston compensation rod 25 to provide safety protection for the moving parts and hydraulic sealing. Through the above device, it is ensured that the volume of hydraulic oil on both sides pushed by the piston 26 during the reciprocating operation is consistent, thereby ensuring the flow rate of the medium transported in the medium channel per unit time is consistent, and achieving the equality and consistency of the medium flow rate of the four outlets a, b, c, d.

[0060] The connecting rod 8, the cross head 9 and the piston rod 10 are combined into four groups, which are arranged along the length direction of the transmission shaft assembly 6; two groups are arranged on each side of the transmission shaft assembly 6, which are arranged alternately.

[0061] A group of double cylinders 23 and four diaphragm chambers 18 hydraulic ends are arranged on both sides of the power end 1, and each group of double cylinders 23 and four diaphragm chambers 18 hydraulic ends corresponds to a feed compensation part 3; each cylinder 23 corresponds to a piston rod 10, two diaphragm chambers 18, a feed pipe 16, two feed check valves 17, two discharge check valves 20, a discharge compensation part 21 and a discharge pipe 22.

[0062] By using one discharge port corresponding to two parallel diaphragm chambers 18 of one oil cylinder 23 and utilizing the slurry pulsation peak dispersion superposition theory, the flow and pressure pulsations are weakened to ensure that the discharge flow and pressure of each discharge port are the same and stable.

[0063] Two groups of double cylinders 23 and four diaphragm chambers 18 hydraulic ends are arranged on both sides of the power end 1, two groups of oppositely arranged feed compensation parts 3 and a set of motor reduction power part 4, and the feed compensation part 3 provides slurry for the hydraulic end.

[0064] The power end 1 is a four-turn series combined eccentric transmission shaft structure, and the connecting rods 8 corresponding to the four turns are distributed in pairs on both sides of the transmission shaft 11; two groups of double cylinders 23 and four diaphragm chambers 18 hydraulic ends are arranged on both sides of the power end 1, and each group of hydraulic ends includes independent feed pipes 16, feed check valves 17, diaphragm chambers 18, cylinders 23, discharge check valves 20, discharge compensation parts 21 and independent discharge pipes 22 on both sides. Each group of hydraulic ends includes two symmetrical and reverse discharge pipes 22. A diaphragm pump includes four discharge ports (a, b, c, d); each group of hydraulic ends includes two hydraulic cylinders 23.

[0065] The discharging compensation part 21 adopts a discharging compensation bag type accumulator.

[0066] In view of the four-nozzle opposed spraying process of coal chemical industry, a four-cylinder double-acting opposed hydraulic diaphragm pump of the present invention is used to correspond to a gasifier, so that a single pump corresponds to a single gasifier, ensuring the synchronization consistency of the slurry flow rate and pressure of the gasifier, meeting the technical requirements of four-nozzle coal chemical gasification, improving efficiency, and saving energy and increasing efficiency.

[0067] The present invention can also be applied to medium parameter matching in the field of large flow, medium and low pressure and special process systems, filling the flow and pressure parameter range that cannot be covered by existing types of diaphragm pumps. The present invention has a compact structure, small footprint, stable flow and pressure at each outlet of the hydraulic diaphragm pump, and is suitable for special process systems.

[0068] The transmission shaft assembly 6 is fixed on the opposed housing 5 , and the transmission shaft assembly 6 is fixed in the center by bearings 7 on both sides and bushings on both sides.

[0069] The transmission shaft assembly 6 includes a transmission shaft 11, side eccentric wheels 12 are arranged on both sides of the transmission shaft 11, and an intermediate eccentric wheel 13 is arranged on the transmission shaft 11 between the side eccentric wheels 12. The transmission shaft 11 is connected to the side eccentric wheels 12 and the intermediate eccentric wheel 13 through a key 14. The two side eccentric wheels 12 are respectively connected to a connecting rod 8, and the two sides of the intermediate eccentric wheel 13 are respectively connected to a connecting rod 8; the two connecting rods 8 connected to the two side eccentric wheels 12 are placed on both sides of the transmission shaft 11 (i.e., Figure 5 As shown, one connecting rod 8 is placed on the left side and the other connecting rod 8 is placed on the right side), and the two connecting rods 8 connected to the intermediate eccentric wheel 13 are placed on both sides of the transmission shaft 11.

[0070] Different numbers of eccentric wheels can be arranged as required, the installation phase angles between the eccentric wheels can be arranged as required, and the installation phase angle differences between the eccentric wheels can be fixed by key connection according to the design value.

[0071] The phase angle between the connecting rod 8 connected to the first side eccentric wheel 12 and the connecting rod 8 on the first side of the adjacent intermediate eccentric wheel 13 is 270 degrees, the phase angle between the connecting rod 8 on the first side of the intermediate eccentric wheel 13 and the connecting rod 8 on the second side of the intermediate eccentric wheel 13 is 180 degrees, and the phase angle between the connecting rod 8 on the second side of the intermediate eccentric wheel 13 and the connecting rod 8 connected to the second side eccentric wheel 12 is 90 degrees.

[0072] like Fig. 9 As shown, the power end 1 adopts a group of series-combined eccentric transmission shafts 11, with the 1st and 3rd turns arranged on one side of the power end 1, and the 2nd and 4th turns arranged on the other side of the power end 1. The phase angle between the 1st turn and the 2nd turn is 270 degrees, the phase angle between the 2nd turn and the 3rd turn is 180 degrees, and the phase angle between the 3rd turn and the 4th turn is 90 degrees, ensuring that the phase angle between the 1st turn and the 3rd turn in the same direction is 90 degrees, and the phase angle between the 2nd turn and the 4th turn is 270 degrees. The 1st turn and the 4th turn select a separate eccentric wheel (i.e., the side eccentric wheel 12), and the 2nd and 3rd turns can use an integral eccentric wheel (i.e., the middle eccentric wheel 13), and the eccentric wheel and the transmission shaft 11 are connected by a key structure. When working, when the 1st turn is at the front end, the 3rd turn is at the position about to be at the front end. At this time, the 2nd turn on the other side is at the position about to be at the rear end, and the 4th turn is at the rear end.

[0073] A crank-connecting rod assembly (i.e., a crank-connecting rod slider mechanism) is formed on each turn of the series-type four-turn transmission shaft through bearings 7, connecting rods 8, and crossheads 9, so that the rotational motion of the transmission shaft 11 is converted into the linear motion of the crosshead 9. Due to the structural layout of the four turns with different phase angles and the structural setting of the eccentric wheel, the center of gravity position of the eccentric wheel is adjusted by the counterweight installed on the transmission shaft, so that the center of gravity of the four-turn transmission shaft is always located on the center line of the transmission shaft 11 during the rotation working process, so that the power end of the four-turn transmission is always in a dynamic balance state, reducing vibration noise and achieving smooth operation of the power end, providing stable power for the hydraulic end.

[0074] The transmission shaft assembly 6 is a series four-turn transmission type, which is a typical crank-connecting rod slider mechanism. Specifically, the first bearing 42 is installed on the side eccentric wheel 12 and the middle eccentric wheel 13, the large end of the connecting rod 8 cooperates with the first bearing 42, the small end of the connecting rod 8 is connected to the crosshead 9 slider through the second bearing 43, and the crosshead 9 is connected to the piston rod 10 through the flange 44. Through this assembly, the rotational motion of the motor reduction power part 4 is converted into the linear motion of the crosshead 9, realizing the function of the crank-connecting rod slider.

[0075] The center of the box body 5 is the center line of the series combined eccentric transmission shaft, and two groups of crank connecting rod mechanisms are arranged on both sides to connect two groups of opposite hydraulic ends.

[0076] The power input end of the power end 1 is connected to the power output end of the motor reduction power part 4 through a coupling.

[0077] The motor deceleration power part 4 transmits power to a set of two-way four-turn power ends 1 through a coupling. The four-turn transmission shaft part 6 inside the power end 1 converts the rotational motion into the linear motion of the crosshead 9 and the piston rod 10, driving the piston 26 inside the cylinder 23 to move back and forth linearly, and transmits the mechanical power to the hydraulic oil on both sides of the piston 26. The hydraulic oil moves back and forth with the piston, pushing the diaphragms 19 in the diaphragm chambers 18 on both sides to change their convex and concave, thereby alternately opening and closing the feed check valve 17 and the discharge check valve 20, and realizing the medium transportation through the discharge compensation part 21 and the four independent discharge pipes 22.

[0078] To achieve the same medium flow rate passing through each group of medium channels per unit time, thereby ensuring that the medium output from the four outlets is equal in amount and pressure. It can be seen from the structure of the oil cylinder 23 and the diaphragm chamber 18 that the medium flow rate passing through each group of medium channels per unit time is consistent with the volume of hydraulic oil on the other side of the diaphragm corresponding to the channel. In order to ensure that the medium flow rate passing through each group of medium channels per unit time is the same, the volume of oil pushed on both sides of the piston is ensured to be consistent during the reciprocating stroke of the piston. Therefore, the piston compensation rod 25 is added to ensure the consistency of the oil volume on both sides of the piston 26. In the space on the other side of the piston 26 where there is no piston rod 10, the piston compensation rod 25 and related components are added to achieve the consistency of the volume of oil pushed on both sides of the piston during the reciprocating stroke of the piston 26. The specific volume of oil pushed during the stroke of the piston 26 is V=D / 4×(Dd) 2 ×L, where D represents the diameter of the piston 26 (i.e., the inner diameter of the cylinder liner), d represents the diameter of the piston rod 10 and the piston compensation rod 25, and L represents the reciprocating stroke of the piston.

[0079] One end of the diaphragm chamber 18 is connected to the feed check valve 17 , and the other end of the diaphragm chamber 18 is connected to the discharge check valve 20 ; the feed check valve 17 is connected to the feed pipe 16 , and the discharge check valve 20 is connected to the discharge pipe 22 through the discharge compensation part 21 .

[0080] The two flange-type hydraulic oil outlets (i.e., the diaphragm chamber connection ports 36) of the oil cylinder 23 are connected to the diaphragm chamber 18 through flanges and fastener bolts. The lower flange of the feed check valve 17 connects the two groups of feed check valves 17 on the same side through the feed pipe 16 on this side, ensuring that the feed pipe 16 on one side of the hydraulic end 2 provides a feed channel for the two feed check valves 17, the diaphragm chamber 18 and the discharge check valve 20 on this side; the two discharge check valves 20 on this side are connected to the discharge compensation part 21 through fasteners and connected to the discharge pipe 22. Through the above configuration, it is ensured that the same power output by the four turns of the same power end is transmitted to the medium through different hydraulic ends 2 to carry out medium transportation. Since the components of the hydraulic end 2 are exactly the same, and only power conversion is performed, the power transmitted by the power end 1 is converted into the hydraulic oil pressure on both sides of the piston 26, and the hydraulic oil pressure is transmitted to the medium through the concave and convex movement of the same diaphragm 19, and finally the medium transportation is completed.

[0081] like Fig.13 As shown, the valve cone valve seat portion 40 of the valve box and the oil cylinder diaphragm guide rod portion 41 are both conventional structures in the art.

[0082] A group of hydraulic ends 2 includes two identical cylinders 23. Two separate medium and hydraulic oil channels are formed on both sides of the piston 26 of one cylinder 23. The hydraulic oil and the medium are separated by a diaphragm 19. Each group of channels includes a medium channel composed of a common feed pipe 16, a separate feed check valve 17, a separate diaphragm chamber 18, and a separate discharge check valve 19. Through the common discharge compensation part 21 channel, it enters the common single-side discharge pipe 22 to form a discharge port. A cylinder 23 finally outputs the medium from a discharge port through the composition of various components of the hydraulic end 2. One side of the double-outlet hydraulic end 2 forms two opposed discharge ports, which correspond to a group of opposed nozzles in the coal chemical gasification system, and the other group of hydraulic ends corresponds to another pair of nozzles, meeting the process requirements of the four-nozzle opposed gasifier. The same power, the same cylinder 23, the same medium channel, and different discharge ports can ensure the consistency of the output medium flow and pressure.

[0083] The feed compensation part 3 includes a feed fork tube tank 48 and a feed flow compensation tank 49. The feed ports (i1, i2) are connected to the inlets of the feed flow compensation tanks 49 on both sides through the feed fork tube tank 48, and the outlet of the feed flow compensation tank 49 is connected to the feed pipe 16. The feed fork tube tank 48 is equivalent to a distributor, and one feed port is divided into two feed ports, which are connected to the flow compensation tank 49. The compensation tank is equivalent to a low-pressure pressure vessel or a slurry storage tank, which is cylindrical and mainly functions to provide sufficient slurry and stabilize the feed pressure for the diaphragm chamber of the diaphragm pump valve box. A structure in which one feed port i1 / i2 corresponds to a group of hydraulic ends 2 is realized.

[0084] The medium transported in the present invention is fed into the feed ports i1 and i2 through two groups of opposed feed compensation parts 3, respectively. Through the operation of the four-cylinder double-acting hydraulic diaphragm pump of the present invention, the medium at the i1 inlet is discharged from the discharge ports a and b through the alternating operation of the components of the double-outlet hydraulic end 2 on this side. At this time, since the medium flow pressure discharged from the discharge ports a and b through the same power end 1 and the double-outlet hydraulic end 2 on the same side is consistent, a group of opposed nozzles corresponding to the coal chemical gasifier can enhance the gasification effect of coal slurry and oxygen, improve the conversion efficiency of the gasifier, and reduce costs and increase efficiency. Similarly, the medium at the i2 inlet is discharged from the discharge ports c and d through the alternating operation of the components of the double-outlet hydraulic end 2 on this side, corresponding to another group of opposed nozzles of the four-nozzle gasifier. At this time, in the four-nozzle opposed gasifier, the flow rate and pressure of the coal slurry sprayed out by the four symmetrically arranged process nozzles are basically the same, especially the flow rate and pressure of the opposed nozzles are completely consistent, which greatly enhances the gasification effect of the water-coal slurry.

[0085] The present invention can be used as a hydraulic diaphragm pump for four-nozzle opposed water-coal slurry gasification technology. The four-cylinder double-acting hydraulic diaphragm pump includes four discharge ports (a, b, c, d). Two discharge ports at the hydraulic end 2 on one side provide water-coal slurry medium for two opposed gasifier nozzles, and two discharge ports at the hydraulic end on the other side provide water-coal slurry medium for the other two opposed gasifier nozzles, thereby ensuring the consistency of the water-coal slurry medium flow and pressure of the opposed nozzles, thereby ensuring the stability of the pressure flow of the entire gasifier, realizing the configuration of one diaphragm pump corresponding to one gasifier, reducing the number of diaphragm pumps, improving stability, optimizing configuration, and reducing costs. The four-cylinder double-acting hydraulic diaphragm pump occupies a small space, has excellent energy-saving effect, and is highly efficient, and is suitable for large-scale coal chemical gasification processes. Generally speaking, the four-cylinder double-acting hydraulic diaphragm pump has high integration, reasonable structure, and is easy to install.

[0086] The four-cylinder double-acting hydraulic diaphragm pump of the present invention can realize the transportation of large-flow media. It can well fill the gap in the matching parameters for the lack of diaphragm pumps for large-flow and low-pressure medium transportation in the application field, and realize one four-cylinder diaphragm pump to replace multiple diaphragm pumps of other types in parallel, thus saving space, achieving obvious energy-saving effects, and reducing costs and increasing efficiency.

[0087] In summary, the opposed four-cylinder double-acting hydraulic diaphragm pump provided by the present invention adopts a set of four-turn series combined transmission shafts, two sets of opposed double-outlet hydraulic ends, a set of electric reduction power devices, and four sets of oil cylinder piston rod compensation devices. Since the same power, the same oil cylinder, the same medium conveying channel, and different discharge ports are used, the consistency of the output medium flow and pressure can be guaranteed. In the field of coal chemical four-nozzle opposed water-coal slurry pressurized gasification technology, the present invention realizes the configuration of one diaphragm pump corresponding to one gasifier, meets the process requirements of the same flow and pressure, improves stability, optimizes configuration, and reduces energy consumption. In other application fields such as tailings, chemical industry, metallurgy, electricity and other solid-liquid medium transportation fields, the present invention makes up for the gaps in matching parameters such as large flow and small pressure, and realizes one four-cylinder diaphragm pump to replace multiple other types of diaphragm pumps in parallel, saving space, reducing costs and increasing efficiency.

[0088] The oppositely arranged hydraulic ends of the present invention can also be merged through the discharge pipe, and the two outlets of the hydraulic end on the same side can be turned and merged into one discharge port, realizing a four-cylinder double-acting double-outlet configuration, which has an effect equivalent to an optimized double diaphragm pump, realizing large-flow medium transportation.

[0089] like Figures 14 to 16 As shown, the two discharge pipes 22 on the same side of the present invention extend to the middle and are connected to the main discharge pipe 38 through the main discharge compensation part 37. With the support of the main pipe collection and discharge compensation, on-site construction can be simplified. Since the pipelines in the mining enterprise are finally collected, they are collected near the pump discharge port, which is convenient for on-site construction.

[0090] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A diaphragm pump structure, comprising a power end (1) and a fluid end (2), wherein the power end (1) drives the fluid end (2), characterized in that The power end (1) drives a plurality of hydraulic ends (2) simultaneously.

2. A diaphragm pump structure according to claim 1, characterized in that The multiple hydraulic ends (2) are evenly distributed into two groups, and the two groups of hydraulic ends (2) are symmetrically arranged on both sides of the power end (1).

3. A diaphragm pump structure according to claim 1, characterized in that The hydraulic end (2) comprises a diaphragm chamber (18), and the power end (1) drives the diaphragms (19) in the multiple diaphragm chambers (18) of the diaphragm pump to change their concave and convex shapes.

4. A diaphragm pump structure according to claim 3, characterized in that The multiple diaphragm chambers (18) are divided into multiple diaphragm chamber groups, each diaphragm chamber group corresponds to a discharge port, and the discharge flow rates of the discharge ports are the same.

5. A diaphragm pump structure according to claim 1, characterized in that The power end (1) comprises a transmission shaft assembly (6), the transmission shaft assembly (6) is connected to a crosshead (9) via a connecting rod (8), the crosshead (9) is connected to one end of a piston rod (10), and the other end of the piston rod (10) is connected to a piston (26) inside an oil cylinder (23) of the hydraulic end (2).

6. A diaphragm pump structure according to claim 5, characterized in that The oil cylinder (23) comprises an oil cylinder body (28), the inner wall of the oil cylinder body (28) is connected to a cylinder sleeve (27), a piston (26) is arranged in the cylinder sleeve (27), and the piston rod (10) passes through the piston (26) and is connected to the piston compensation rod (25); an oil cylinder cover (24) is arranged at the end of the oil cylinder body (28), an inner side of the oil cylinder cover (24) is provided with an inner and outer connecting flange (34), a positioning sleeve (29) and an intermediate pressing sleeve (30) are arranged on the inner side of the connecting inner and outer flange (34), the inner sides of the positioning sleeve (29) and the intermediate pressing sleeve (30) are connected to the outer wall of the piston compensation rod (25), an outer pressing sleeve (32) is arranged at the outer end of the intermediate pressing sleeve (30), and a piston rod sealing ring (31) is arranged between the intermediate pressing sleeve (30) and the outer pressing sleeve (32); diaphragm chamber connecting ports (36) are arranged on both sides of the oil cylinder body (28), and the piston (26) is placed between the two diaphragm chamber connecting ports (36).

7. A diaphragm pump structure according to claim 5, characterized in that The connecting rod (8), the cross head (9) and the piston rod (10) are combined into four groups, which are arranged along the length direction of the transmission shaft assembly (6); two groups are arranged on each side of the transmission shaft assembly (6) and are arranged alternately.

8. A diaphragm pump structure according to claim 1, characterized in that A group of double oil cylinders (23) four diaphragm chambers (18) hydraulic ends (2) are respectively arranged on both sides of the power end (1), and each group of double oil cylinders (23) four diaphragm chambers (18) hydraulic ends corresponds to a feed compensation part (3); each oil cylinder (23) corresponds to a piston rod (10), two diaphragm chambers (18), a feed pipe (16), two feed check valves (17), two discharge check valves (20), a discharge compensation part (21) and a discharge pipe (22); One end of the diaphragm chamber (18) is connected to the feed check valve (17), and the other end of the diaphragm chamber (18) is connected to the discharge check valve (20); the feed check valve (17) is connected to the feed pipe (16), and the discharge check valve (20) is connected to the discharge pipe (22) through the discharge compensation part (21).

9. A diaphragm pump structure according to claim 8, characterized in that The two discharge pipes (22) on the same side extend toward the middle and are connected to the main discharge pipe (38) through the main discharge compensation part (37).

10. A diaphragm pump structure according to claim 5, characterized in that The transmission shaft assembly (6) comprises a transmission shaft (11), side eccentric wheels (12) are arranged on both sides of the transmission shaft (11), an intermediate eccentric wheel (13) is arranged on the transmission shaft (11) between the side eccentric wheels (12), the transmission shaft (11) is connected to the side eccentric wheels (12) and the intermediate eccentric wheel (13) through a key (14), the two side eccentric wheels (12) are respectively connected to a connecting rod (8), and the two sides of the intermediate eccentric wheel (13) are respectively connected to a connecting rod (8); the two connecting rods (8) connected to the two side eccentric wheels (12) are placed on both sides of the transmission shaft (11), and the two connecting rods (8) connected to the intermediate eccentric wheel (13) are placed on both sides of the transmission shaft (11).

Images