A quick-connect fitting for the inlet pipe of a plunger pump

Abstract

This utility model discloses a quick-connect fitting for a plunger pump inlet pipe, belonging to the field of fitting technology. This quick-connect fitting for a plunger pump inlet pipe includes a docking assembly and a connecting assembly. The docking assembly includes a first connector and a second connector. The connecting assembly includes a connecting disc and a connecting seat. Both the connecting disc and the connecting seat have a hollow annular cross-section. The connecting disc and the connecting seat are respectively fitted onto the opposite ends of the second connector and the first connector, with their opposite sides tightly fitted. The connecting seat has several rotating grooves, each containing a rotatable compression seat. The upper end of the compression seat is wedge-shaped, and a notch is provided inside the compression seat. The upper end of the notch is tightly fitted with the side of the connecting disc away from the connecting seat. This utility model can effectively achieve quick assembly and disassembly between the plunger pump and the inlet pipe, and has high practical value.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, specifically a quick-connect connector for the inlet pipe of a plunger pump. Background Technology

[0002] A plunger pump is a hydraulic power device that relies on the reciprocating motion of a plunger within a plunger chamber to change the volume of the chamber, thereby achieving the intake, pressurization, and discharge of liquid. Its core principle is: when the plunger retracts, the volume of the plunger chamber increases, creating negative pressure and drawing in liquid; when the plunger advances, the volume decreases, pressurizing the liquid and outputting a high-pressure medium (such as hydraulic oil or water) through the discharge port. Plunger pumps are characterized by high pressure, stable flow, and high efficiency, and are widely used in engineering machinery, agricultural machinery, high-pressure cleaning equipment, and other applications requiring high-pressure power. The plunger pump inlet pipe connects the plunger pump inlet to a storage device such as an oil tank or water tank. Its function is to deliver low-pressure liquids, such as hydraulic oil or clean water, to the plunger chamber of the pump, providing the medium for the pump's suction process.

[0003] Based on the above, the inventors have discovered the following problems: Currently, plunger pumps and inlet pipes are generally connected by welding. Since plunger pumps need to be disassembled and maintained regularly, the welded inlet pipes need to be cut each time they are disassembled. After maintenance, they need to be re-welded and repositioned. This operation is cumbersome, time-consuming, and labor-intensive. Moreover, repeated cutting and welding will cause the material properties at the pipe interface to degrade, making it very easy for leaks to occur at the weld, especially on the low-pressure inlet side. Even tiny gaps may cause air to be drawn in or media to leak during liquid suction.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a quick-connect fitting for the inlet pipe of a plunger pump, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this invention is to provide a quick-connect fitting for the inlet pipe of a plunger pump to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A quick-connect fitting for a plunger pump inlet pipe includes a docking assembly and a connecting assembly. The docking assembly includes a first connector and a second connector. The connecting assembly includes a connecting disc and a connecting seat. The cross-section of the connecting disc and the connecting seat is hollow and annular. The connecting disc and the connecting seat are respectively fitted onto the opposite ends of the second connector and the first connector. The opposite sides of the connecting disc and the connecting seat are tightly fitted together. The connecting seat has several rotating grooves, and each of the rotating grooves is rotatably connected to a compression seat. The upper end of the compression seat is wedge-shaped, and the interior of the compression seat has a notch. The upper end of the notch is tightly fitted with the side of the connecting disc away from the connecting seat.

[0008] Furthermore, the outer walls of several of the extrusion seats are provided with external threads, and a locking ring is fitted around the outside of several of the extrusion seats. The inner wall of the locking ring is provided with internal threads, and the internal threads and external threads are engaged and connected.

[0009] The beneficial effects of adopting the above-mentioned further solution are that, after the first connector and the second connector are connected, the wedge-shaped end of the original extrusion seat under the action of gravity is facing the first connector. At this time, the extrusion seats are turned in sequence so that the upper end of the notch is against the top surface of the connecting plate. Then, the locking ring is put on several extrusion seats and rotated to achieve thread locking. Only one locking ring needs to be rotated to lock or loosen all the extrusion seats. Compared with tightening multiple bolts one by one, the operation time is shortened. The thread engagement has self-locking properties and can resist the high-frequency vibration during the operation of the plunger pump, preventing the joint from loosening and leaking.

[0010] Furthermore, the first connector has a sealing seat installed at one end near the second connector. The sealing seat is hemispherical. The second connector has a groove inside at one end near the first connector. The sealing seat is located in the groove. The outer wall of the sealing seat fits against the inner wall of the groove. The sealing seat is made of fluororubber.

[0011] The beneficial effects of adopting the above-mentioned further solution are that when the hemispherical sealing seat fits into the arc-shaped inner wall of the groove, it can automatically adapt to a certain installation eccentricity, solving the problem of local gap leakage caused by non-parallel docking of the planar seal; at the same time, the hemispherical sealing seat disperses the impact force of liquid flow, such as the pulse pressure during liquid inlet, which reduces the wear rate of the sealing seat surface and extends the service life compared with the planar seal.

[0012] Furthermore, the sealing seat is provided with a plurality of limiting grooves, the number of which is four. Each groove is provided with a limiting strip inside. The outer wall of the limiting strip is fixedly connected to the inner wall of the groove. The limiting groove and the limiting strip cooperate with each other. The limiting strip is made of polyurethane material.

[0013] The beneficial effects of adopting the above-mentioned further solution are that the four limiting strips are embedded in the corresponding limiting grooves, which strictly restricts the relative rotation between the sealing seat and the groove, and avoids circumferential rotation of the first connector and the second connector when vibrating or dragging the pipeline. For example, if the sealing seat and the groove are misaligned due to the pulling of the liquid inlet pipe, it ensures that the sealing surface is always aligned and the sealing effect is stable. At the same time, the sliding cooperation between the limiting strips and the limiting grooves provides guidance for the docking process. Simply align the limiting strips with the limiting grooves and push them in to complete the initial positioning of the sealing seat and the groove, without the need for visual calibration.

[0014] Furthermore, both the sealing seat and the first connector have through grooves inside, and the two through grooves are connected to each other. The second connector has a connecting pipe inside, and the bottom end of the connecting pipe extends out of the second connector and into the interior of the first connector. The bottom end of the connecting pipe is flush with the bottom end of the first connector, and the outer wall of the connecting pipe slides in fit with the inner wall of the through groove.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the connecting pipe extends from the second connector to the through groove of the first connector, and the liquid first enters the plunger pump directly through the inlet via the connecting pipe, ensuring smooth liquid suction of the plunger pump; the sliding fit between the connecting pipe and the through groove provides radial support for the first connector and the second connector, reducing shaking after docking.

[0016] Furthermore, the end of the second connector away from the first connector is connected to an inlet pipe.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the second connector and the inlet pipe are directly connected by welding or injection molding, which reduces potential leakage points and lowers the probability of leakage compared to the combined structure of connector hose clamp.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The quick-connect fitting for the plunger pump inlet pipe involves welding the first connector to the plunger pump inlet, and then connecting the second connector to the first connector. The portion of the connecting pipe on the second connector located outside the second connector is submerged in the through groove. The sealing seat fits into the groove, the limiting strip is located in the limiting groove, and the connecting plate and the connecting seat are aligned and fitted. Then, the wedge-shaped ends of the original extrusion seats, under the action of gravity, all face the first connector. At this time, the extrusion seats are turned in sequence so that the upper end of the notch abuts against the top surface of the connecting plate. The locking ring is then placed on several extrusion seats and rotated to achieve thread locking. Only one locking ring needs to be rotated to lock or loosen all the extrusion seats, which shortens the operation time compared to tightening multiple bolts one by one. The thread engagement has self-locking properties, which can resist the high-frequency vibration during the operation of the plunger pump and prevent the joint from loosening and leaking. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of a quick-connect fitting for a plunger pump inlet pipe provided by this utility model;

[0020] Figure 2 An exploded three-dimensional structural diagram of the docking assembly of a quick-connect fitting for a plunger pump inlet pipe provided by this utility model;

[0021] Figure 3 An exploded three-dimensional view of the docking assembly of a quick-connect fitting for a plunger pump inlet pipe provided by this utility model.

[0022] Figure 4A three-dimensional structural schematic diagram of a quick-connect fitting assembly for a plunger pump inlet pipe provided by this utility model;

[0023] Figure 5 An exploded three-dimensional structural diagram of the connection assembly of a quick-connect fitting for a plunger pump inlet pipe provided by this utility model.

[0024] In the diagram: 1. Docking assembly; 11. First connector; 12. Sealing seat; 13. Limiting groove; 14. Through groove; 15. Second connector; 16. Groove; 17. Limiting strip; 18. Connecting pipe; 2. Connecting assembly; 21. Connecting disc; 22. Connecting seat; 23. Rotating groove; 24. Pressing seat; 25. Notch; 26. Locking ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5This utility model provides a technical solution: a quick-connect fitting for a plunger pump inlet pipe, including a docking assembly 1 and a connecting assembly 2. The docking assembly 1 includes a first connector 11 and a second connector 15. The connecting assembly 2 includes a connecting plate 21 and a connecting seat 22. The cross-section of the connecting plate 21 and the connecting seat 22 is hollow annular. The connecting plate 21 and the connecting seat 22 are respectively fitted onto the opposite ends of the second connector 15 and the first connector 11. The opposite sides of the connecting plate 21 and the connecting seat 22 are tightly fitted together. The connecting seat 22 has several rotating grooves 23, and each of the rotating grooves 23 is rotatably connected to a pressing seat 24. The upper end of the pressing seat 24 is wedge-shaped, and the interior of the pressing seat 24 has a notch 25. The upper end of the interior of the notch 25 is tightly fitted with the side of the connecting plate 21 away from the connecting seat 22. The outer walls of several extrusion seats 24 are provided with external threads, and locking rings 26 are fitted around the outer walls of several extrusion seats 24. The inner walls of the locking rings 26 are provided with internal threads, and the internal threads and external threads are engaged. After the first connector 11 and the second connector 15 are connected, the wedge-shaped ends of the original extrusion seats 24, under the action of gravity, all face the first connector 11. At this time, the extrusion seats 24 are turned in sequence so that the upper inner end of the notch 25 abuts against the top surface of the connecting plate 21, and the locking rings 26 are fitted onto several extrusion seats 24 and rotated to achieve thread locking. Only one locking ring 26 needs to be rotated to lock or loosen all extrusion seats 24, which shortens the operation time compared to tightening multiple bolts one by one. The thread engagement has self-locking properties, which can resist the high-frequency vibration during the operation of the plunger pump and prevent the joint from loosening and leaking.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5This utility model provides a technical solution: A sealing seat 12 is installed on the end of the first connector 11 near the second connector 15. The sealing seat 12 is hemispherical. A groove 16 is formed inside the end of the second connector 15 near the first connector 11. The sealing seat 12 is located in the groove 16, and the outer wall of the sealing seat 12 fits against the inner wall of the groove 16. A plurality of limiting grooves 13 are formed on the sealing seat 12, and the number of limiting grooves 13 is four. A limiting strip 17 is provided inside the groove 16. The outer wall of the limiting strip 17 is fixedly connected to the inner wall of the groove 16. The limiting grooves 13 cooperate with the limiting strips 17. A through groove 14 is formed inside both the sealing seat 12 and the first connector 11. The two through grooves 14 are connected to each other. A connecting pipe 18 is connected inside the second connector 15. The bottom end of the connecting pipe 18 extends out of the second connector 15 and into the interior of the first connector 11. The bottom end of the connecting pipe 18 is flush with the bottom end of the first connector 11. The outer wall of the connecting pipe 18 slides into the inner wall of the through groove 14. The end of the second connector 15 away from the first connector 11 is connected to the liquid inlet pipe. The first connector 11 is welded to the liquid inlet of the plunger pump, and then the second connector 15 is connected to the first connector 11. The part of the connecting pipe 18 on the second connector 15 located outside the second connector 15 is submerged in the inside of the through groove 14. The sealing seat 12 fits into the groove 16. The limiting strip 17 is located in the limiting groove 13. The connecting plate 21 and the connecting seat 22 are aligned and fitted. The four limiting strips 17 are embedded in the corresponding limiting grooves 13, which strictly limits the relative rotation between the sealing seat 12 and the groove 16, and prevents the first connector 11 and the second connector 15 from rotating circumferentially when vibrating or dragging the pipeline. The connecting pipe 18 extends from the second connector 15 into the through groove 14 of the first connector 11. The liquid first enters the plunger pump directly through the liquid inlet via the connecting pipe 18, ensuring smooth liquid suction of the plunger pump.

[0029] Specifically, the working principle of this quick-connect fitting for the plunger pump inlet pipe is as follows: In use, the first connector 11 is welded to the plunger pump inlet. Then, the second connector 15 is connected to the first connector 11. The portion of the connecting pipe 18 on the second connector 15 located outside the second connector 15 is submerged in the through groove 14. The sealing seat 12 fits against the groove 16, the limiting strip 17 is located within the limiting groove 13, and the connecting plate 21 and the connecting seat 22 are aligned and fitted. Then, the wedge-shaped end of the original squeezing seat 24, under the influence of gravity, faces the first connector 11. At this time, the squeezing seat 24 is sequentially moved to... After the upper inner end of the notch 25 abuts against the top surface of the connecting plate 21, the locking ring 26 is fitted onto several extrusion seats 24 and rotated to achieve threaded locking; only one locking ring 26 needs to be rotated to lock or loosen all the extrusion seats 24, which shortens the operation time compared to tightening multiple bolts one by one; the threaded engagement has self-locking properties, which can resist the high-frequency vibration during the operation of the plunger pump and prevent the joint from loosening and leaking; the connecting pipe 18 extends from the second connector 15 to the through groove 14 of the first connector 11, and the liquid first enters the plunger pump directly through the liquid inlet through the connecting pipe 18 to ensure smooth liquid suction of the plunger pump.

[0030] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. Furthermore, since this application is mainly used to protect mechanical devices, the control methods and circuit connections will not be explained in detail in this application.

Claims

1. A quick-connect fitting for the inlet pipe of a plunger pump, characterized in that, The assembly includes a docking component (1) and a connecting component (2). The docking component (1) includes a first connector (11) and a second connector (15). The connecting component (2) includes a connecting plate (21) and a connecting seat (22). The cross-section of the connecting plate (21) and the connecting seat (22) is hollow and annular. The connecting plate (21) and the connecting seat (22) are respectively fitted onto the opposite ends of the second connector (15) and the first connector (11). The opposite sides of the connecting plate (21) and the connecting seat (22) are tightly fitted together. The connecting seat (22) has several rotating grooves (23). Each of the rotating grooves (23) is rotatably connected to a pressing seat (24). The upper end of the pressing seat (24) is wedge-shaped, and the inside of the pressing seat (24) has a notch (25). The upper end of the inside of the notch (25) is tightly fitted with the side of the connecting plate (21) away from the connecting seat (22).

2. The quick-connect fitting for the inlet pipe of a plunger pump according to claim 1, characterized in that, The outer walls of several of the extrusion seats (24) are provided with external threads, and a locking ring (26) is sleeved on the outside of several of the extrusion seats (24). The inner wall of the locking ring (26) is provided with internal threads, and the internal threads and the external threads are engaged and connected.

3. The quick-connect fitting for the inlet pipe of a plunger pump according to claim 1, characterized in that, The first connector (11) has a sealing seat (12) installed at one end near the second connector (15). The sealing seat (12) is hemispherical. The second connector (15) has a groove (16) inside at one end near the first connector (11). The sealing seat (12) is located in the groove (16). The outer wall of the sealing seat (12) fits against the inner wall of the groove (16).

4. A quick-connect fitting for the inlet pipe of a plunger pump according to claim 3, characterized in that, The sealing seat (12) is provided with a plurality of limiting grooves (13), and there are four limiting grooves (13). Each groove (16) is provided with a limiting strip (17). The outer wall of the limiting strip (17) is fixedly connected to the inner wall of the groove (16). The limiting groove (13) cooperates with the limiting strip (17).

5. A quick-connect fitting for the inlet pipe of a plunger pump according to claim 4, characterized in that, Both the sealing seat (12) and the first connector (11) have through grooves (14) inside, and the two through grooves (14) are connected to each other. The second connector (15) has a connecting pipe (18) inside, and the bottom end of the connecting pipe (18) extends out of the second connector (15) and into the interior of the first connector (11). The bottom end of the connecting pipe (18) is flush with the bottom end of the first connector (11), and the outer wall of the connecting pipe (18) slides in fit with the inner wall of the through groove (14).

6. A quick-connect fitting for the inlet pipe of a plunger pump according to claim 1, characterized in that, The end of the second connector (15) away from the first connector (11) is connected to an inlet pipe.

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