Four-cylinder plunger pump

Abstract

The utility model discloses a four-cylinder plunger pump, which belongs to the technical field of plunger pumps, and adopts the technical scheme that the four-cylinder plunger pump comprises a pump body and a pump shell, the pump body is connected with the pump shell, a crankshaft is rotatably arranged in the pump shell, two ends of the crankshaft extend out of the pump shell, the end part of the crankshaft is in transmission connection with an external driving source, and four crank throws are eccentrically arranged on the crankshaft; the four crank throws are connected with connecting rods correspondingly, the four connecting rods are connected with plunger bodies correspondingly, a water inlet and a water outlet are formed in the pump body, four cavities are formed in the pump body, and the four plunger bodies are arranged in the four cavities correspondingly in a sliding mode. The crank throw drives the plunger body to reciprocate in the axis direction of the cavity through the connecting rod, the first one-way valve and the second one-way valve are arranged in the pump body, when the plunger pump is installed, the belt wheel can be sleeved at any end of the crankshaft according to the actual space and layout, and the installation flexibility and adaptability are better.

Description

Technical Field

[0001] The utility model belongs to the technical field of plunger pumps, in particular to a four-cylinder plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It mainly relies on the reciprocating motion of the plunger in the cylinder. When the plunger moves in one direction, negative pressure appears in the cylinder. At this time, a one-way valve opens and the liquid is sucked into the cylinder. When the plunger moves in the other direction, the liquid is compressed and another one-way valve opens, and the liquid sucked into the cylinder is discharged, thereby achieving water absorption and water discharge.

[0003] However, the traditional plunger pump has a significant limitation: its drive shaft usually protrudes from only one side of the pump casing and is equipped with a pulley so that it can be connected to an external transmission source through a synchronous belt. The method of installing the pulley on one side undoubtedly increases the demand for installation space and also limits the flexibility of installation. In some scenarios with limited space or complex layout, it is very inconvenient. Utility Model Content

[0004] The purpose of the utility model is to propose a four-cylinder plunger pump in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to improve the flexibility and adaptability of installation.

[0005] The above-mentioned technical purpose of the utility model can be achieved through the following technical solutions: a four-cylinder plunger pump, comprising a pump body and a pump casing, the pump body is connected to the pump casing, a crankshaft is rotatably arranged in the pump casing, both ends of the crankshaft extend out of the pump casing, the end of the crankshaft is transmission-connected to an external driving source, four cranks are eccentrically arranged on the crankshaft, the four cranks are connected to connecting rods, the four connecting rods are connected to plunger bodies, a water inlet and a water outlet are arranged on the pump body, four chambers are arranged in the pump body, the four plunger bodies are slidably arranged in the four chambers respectively, when the external driving source drives the crankshaft to rotate, the crank drives the plunger body to reciprocate along the axial direction of the chamber through the connecting rod, and a one-way valve 1 and a one-way valve 2 are arranged in the pump body.

[0006] In the above-mentioned four-cylinder plunger pump, through holes are opened on both sides of the pump housing, bearings are coaxially arranged in the through holes, and covers are installed on both sides of the pump housing, the cover is coaxially arranged with the bearings, and the end of the crankshaft passes through the bearings and the cover in sequence.

[0007] In the above-mentioned four-cylinder plunger pump, annular grooves are provided on both sides of the pump housing, and the two annular grooves correspond to the two bearings respectively. The annular grooves are coaxially arranged with the bearings, and the annular grooves are close to the outer rings of the bearings. The annular grooves are used for circulating coolant. The pump housing is provided with a liquid inlet and a liquid outlet corresponding to the annular grooves, and the liquid inlet and the liquid outlet are both connected to the annular grooves. The diameter of the liquid outlet gradually decreases from the inside to the outside.

[0008] In the above-mentioned four-cylinder plunger pump, a sealing gasket is arranged between the pump housing and the cover body, and the sealing gasket is used to seal the opening of the annular groove.

[0009] In the above-mentioned four-cylinder plunger pump, a plurality of reinforcement blocks are evenly arranged along the circumferential direction in the annular groove, and a fixing hole is opened on the plurality of reinforcement blocks. A mounting hole corresponding to the fixing hole is opened on the cover body, and a bolt 1 is passed through the mounting hole, and the bolt 1 passes through the sealing gasket and is threadedly connected to the fixing hole.

[0010] In the above-mentioned four-cylinder plunger pump, two oppositely arranged support frames are detachably mounted on the pump housing, and the support frames are U-shaped.

[0011] In the above-mentioned four-cylinder plunger pump, the pump housing includes an outer shell and a shell cover, the shell cover is arranged on the outer shell, and the shell cover and the outer shell are connected by a plurality of bolts, and a sealing ring is arranged between the outer shell and the shell cover.

[0012] In the above-mentioned four-cylinder plunger pump, the cross section of the sealing ring is in an inverted "T" shape, an annular groove is opened on the shell cover, the sealing ring is inserted into the annular groove, and the lower surface of the sealing ring is in contact with the upper end surface of the shell.

[0013] In the above-mentioned four-cylinder plunger pump, a fixing seat is arranged in the pump casing, and a receiving groove 1 and a receiving groove 2 are arranged on the fixing seat. A guide sleeve 1 and a guide sleeve 2 are coaxially arranged in the receiving groove 1 and the receiving groove 2 respectively. The guide sleeve 1 and the guide sleeve 2 are both sleeved on the outside of the plunger body, and the guide sleeve 1 and the guide sleeve 2 are both made of wear-resistant plastic with self-lubricating effect.

[0014] In the above-mentioned four-cylinder plunger pump, a pressure gauge and a filter are provided on the pump body.

[0015] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0016] Since both ends of the crankshaft extend out of the pump housing, a pulley can be installed on any end of the crankshaft to achieve a transmission connection with an external driving source. Therefore, during installation, a pulley can be installed on any end of the crankshaft according to actual space and layout, and the installation flexibility and adaptability are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment;

[0018] Figure 2 It is a partial structural schematic diagram of an embodiment;

[0019] Figure 3 It is a schematic structural diagram of a pump casing of an embodiment;

[0020] Figure 4 A partial cross-sectional view of an embodiment;

[0021] Figure 5 is another partial cross-sectional view of the embodiment;

[0022] Figure 6 It is a partial exploded view of an embodiment;

[0023] Figure 7 is a side view of a pump housing of an embodiment;

[0024] Figure 8 It is a structural schematic diagram of the cover body of the embodiment;

[0025] Fig. 9 It is a cross-sectional view of a fixing seat, a guide sleeve 1 and a guide sleeve 2 of an embodiment;

[0026] Fig.10 2 is a cross-sectional view of a pump body of an embodiment.

[0027] 1. Pump body; 2. Pump casing; 3. Crankshaft; 4. Crank; 5. Connecting rod; 6. Plunger body; 7. Water inlet; 8. Water outlet; 9. Chamber; 10. One-way valve 1; 11. One-way valve 2; 12. Through hole; 13. Bearing; 14. Cover body; 15. Annular groove; 16. Liquid inlet; 17. Liquid outlet; 18. Sealing gasket; 19. Reinforcement block; 20. Bolt 1; 21. Mounting hole; 22. Fixing hole; 23. Support frame; 24. Shell; 25. Shell cover; 26. Bolt 2; 27. Sealing ring; 28. Annular groove; 29. ​​Fixed seat; 30. Accommodating groove 1; 31. Accommodating groove 2; 32. Guide sleeve 1; 33. Guide sleeve 2; 34. Pressure gauge; 35. Filter. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] A four-cylinder plunger pump, such as Figures 1 to 10 As shown, it includes a pump body 1 and a pump casing 2. The pump body 1 is connected to the pump casing 2. A pressure gauge 34 and a filter 35 are provided on the pump body 1.

[0030] A crankshaft 3 is rotatably arranged inside the pump housing 2, with both ends of the crankshaft 3 extending out of the pump housing 2, and the ends of the crankshaft 3 are transmission-connected to an external driving source. Since both ends of the crankshaft 3 extend out of the pump housing 2, during installation, any end of the crankshaft 3 can be arbitrarily selected to be provided with a pulley according to the actual space and layout, thereby realizing a transmission connection with an external driving source, and having better installation flexibility and adaptability.

[0031] Four cranks 4 are eccentrically arranged on the crankshaft 3, and the four cranks 4 are all connected to connecting rods 5, and the four connecting rods 5 are all connected to plunger bodies 6. Four chambers 9 are arranged in the pump body 1, and the four plunger bodies 6 are respectively slidably arranged in the four chambers 9. When an external driving source drives the crankshaft 3 to rotate, the crank 4 drives the plunger body 6 to reciprocate along the axial direction of the chamber 9 through the connecting rod 5.

[0032] The pump body 1 is provided with a water inlet 7 and a water outlet 8. A one-way valve 10 and a one-way valve 2 11 are provided inside the pump body 1. The one-way valve 10 controls one-way water outflow, and the one-way valve 2 11 controls one-way water inflow.

[0033] Through holes 12 are provided on both sides of the pump housing 2, and bearings 13 are coaxially arranged in the through holes 12. Cover bodies 14 are installed on both sides of the pump housing 2, and the cover bodies 14 are coaxially arranged with the bearings 13. The ends of the crankshaft 3 pass through the bearings 13 and the cover bodies 14 in sequence, and the crankshaft 3 is supported to rotate by the bearings 13 to reduce friction and wear.

[0034] Annular grooves 15 are provided on both sides of the pump housing 2. The two annular grooves 15 correspond to the two bearings 13 respectively. The annular grooves 15 are coaxially arranged with the bearings 13 and are close to the outer ring of the bearings 13. The annular grooves 15 are used for circulating coolant. The pump housing 2 is provided with a liquid inlet 16 and a liquid outlet 17 corresponding to the annular grooves 15. The liquid inlet 16 and the liquid outlet 17 are both connected to the annular grooves 15. The coolant enters the annular groove 15 from the liquid inlet 16 and then flows out from the liquid outlet 17. The heat generated at the two bearings 13 is taken away by the coolant, thereby achieving effective cooling and rapid heat dissipation of the bearings 13.

[0035] The diameter of the liquid outlet 17 gradually decreases from the inside to the outside, thereby slowing down the outflow speed of the coolant, prolonging the residence time of the coolant in the annular groove 15, and improving the cooling effect on the bearing 13.

[0036] Two support frames 23 arranged opposite to each other are detachably mounted on the pump housing 2. The support frames 23 are connected to the pump housing 2 by bolts, and the support frames 23 are U-shaped.

[0037] A sealing gasket 18 is provided between the pump housing 2 and the cover body 14 , and is used to seal the opening of the annular groove 15 . Preferably, the sealing gasket 18 is made of an elastic material, and the sealing gasket 18 prevents the coolant from leaking out of the opening of the annular groove 15 under the sealing effect.

[0038] Several reinforcing blocks 19 are evenly arranged along the circumferential direction in the annular groove 15. It should be noted that since the annular groove 15 needs to withstand the pressure of the coolant and the vibration of the pump housing 2, the reinforcing blocks 19 can effectively prevent the annular groove 15 from deforming or breaking, and several reinforcing blocks 19 can slow down the coolant flow rate in the annular groove 15, so that the contact time between the coolant and the annular groove 15 is longer, and the heat dissipation effect of the bearing 13 is better.

[0039] Several reinforcing blocks 19 are provided with fixing holes 22, and the cover body 14 is provided with mounting holes 21 corresponding to the fixing holes 22. A bolt 20 is passed through the mounting hole 21, and the bolt 20 passes through the sealing gasket 18 and is threadedly connected to the fixing hole 22, thereby achieving a stable connection between the cover body 14 and the pump housing 2.

[0040] The pump casing 2 includes an outer casing 24 and a casing cover 25. The casing cover 25 is covered on the outer casing 24, and the casing cover 25 and the outer casing 24 are connected by a plurality of bolts 26. A sealing ring 27 is provided between the outer casing 24 and the casing cover 25. The cross section of the sealing ring 27 is in an inverted "T" shape. An annular groove 28 is provided on the casing cover 25. The sealing ring 27 is inserted into the annular groove 28. The lower surface of the sealing ring 27 is in contact with the upper end surface of the outer casing 24.

[0041] A fixed seat 29 is arranged in the pump housing 2, and an accommodating groove 1 30 and an accommodating groove 2 31 are arranged on the fixed seat 29. A guide sleeve 1 32 and a guide sleeve 2 33 are coaxially arranged in the accommodating groove 1 30 and the accommodating groove 2 31 respectively. The guide sleeve 1 32 and the guide sleeve 2 33 are both sleeved on the outer side of the plunger body 6, and the guide sleeve 1 32 and the guide sleeve 2 33 are both made of wear-resistant plastic with self-lubricating effect. Through the guiding effect of the guide sleeve 1 32 and the guide sleeve 2 33 on the plunger body 6, the stability of the reciprocating movement of the plunger body 6 is improved, and the service life of the plunger body 6 is extended.

[0042] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. A four-cylinder plunger pump, comprising a pump body (1) and a pump casing (2), wherein the pump body (1) is connected to the pump casing (2), characterized in that: A crankshaft (3) is rotatably arranged in the pump housing (2), both ends of the crankshaft (3) extend out of the pump housing (2), the ends of the crankshaft (3) are connected to an external driving source in a transmission manner, four cranks (4) are eccentrically arranged on the crankshaft (3), the four cranks (4) are connected to connecting rods (5), the four connecting rods (5) are connected to plunger bodies (6), a water inlet (7) and a water outlet (8) are arranged on the pump body (1), four chambers (9) are arranged in the pump body (1), the four plunger bodies (6) are slidably arranged in the four chambers (9), when the external driving source drives the crankshaft (3) to rotate, the crank (4) drives the plunger body (6) to reciprocate along the axial direction of the chamber (9) through the connecting rod (5), and a one-way valve (10) and a one-way valve (11) are arranged in the pump body (1).

2. A four-cylinder plunger pump according to claim 1, characterized in that: Through holes (12) are provided on both sides of the pump housing (2), and bearings (13) are coaxially arranged in the through holes (12). Cover bodies (14) are installed on both sides of the pump housing (2), and the cover bodies (14) are coaxially arranged with the bearings (13), and the ends of the crankshaft (3) pass through the bearings (13) and the cover bodies (14) in sequence.

3. A four-cylinder plunger pump according to claim 2, characterized in that: Annular grooves (15) are provided on both sides of the pump housing (2), and the two annular grooves (15) correspond to the two bearings (13) respectively. The annular grooves (15) are coaxially arranged with the bearings (13), and the annular grooves (15) are close to the outer rings of the bearings (13). The annular grooves (15) are used for circulating coolant. The pump housing (2) is provided with a liquid inlet (16) and a liquid outlet (17) corresponding to the annular grooves (15). The liquid inlet (16) and the liquid outlet (17) are both connected to the annular grooves (15), and the diameter of the liquid outlet (17) gradually decreases from the inside to the outside.

4. A four-cylinder plunger pump according to claim 3, characterized in that: A sealing gasket (18) is provided between the pump housing (2) and the cover body (14), and the sealing gasket (18) is used to seal the opening of the annular groove (15).

5. A four-cylinder plunger pump according to claim 4, characterized in that: A plurality of reinforcing blocks (19) are evenly arranged in the circumferential direction in the annular groove (15), and a fixing hole (22) is formed on each of the reinforcing blocks (19). A mounting hole (21) corresponding to the fixing hole (22) is formed on the cover body (14), and a bolt (20) is passed through the mounting hole (21), and the bolt (20) passes through the sealing gasket (18) and is threadedly connected to the fixing hole (22).

6. A four-cylinder plunger pump according to claim 3, characterized in that: Two support frames (23) arranged opposite to each other are detachably mounted on the pump housing (2), and the support frames (23) are in a U shape.

7. A four-cylinder plunger pump according to claim 6, characterized in that: The pump casing (2) comprises an outer casing (24) and a casing cover (25); the casing cover (25) is arranged on the outer casing (24), and the casing cover (25) and the outer casing (24) are connected via a plurality of bolts (26); a sealing ring (27) is arranged between the outer casing (24) and the casing cover (25).

8. A four-cylinder plunger pump according to claim 7, characterized in that: The cross section of the sealing ring (27) is in an inverted "T" shape. The shell cover (25) is provided with an annular groove (28). The sealing ring (27) is inserted into the annular groove (28). The lower surface of the sealing ring (27) is in contact with the upper end surface of the shell (24).

9. A four-cylinder plunger pump according to claim 1, characterized in that: A fixing seat (29) is arranged in the pump housing (2), and a first accommodating groove (30) and a second accommodating groove (31) are arranged on the fixing seat (29). A first guide sleeve (32) and a second guide sleeve (33) are coaxially arranged in the first accommodating groove (30) and the second accommodating groove (31), respectively. The first guide sleeve (32) and the second guide sleeve (33) are both sleeved on the outer side of the plunger body (6), and the first guide sleeve (32) and the second guide sleeve (33) are both made of wear-resistant plastic with self-lubricating effect.

10. A four-cylinder plunger pump according to claim 1, characterized in that: The pump body (1) is provided with a pressure gauge (34) and a filter (35).

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