Plunger pump convenient to assemble, disassemble and maintain

Abstract

The invention provides a plunger pump convenient to assemble, disassemble and maintain, and is applied to the technical field of plunger pumps. According to the technical scheme, the pump is characterized by comprising a pump body structure, a front pump body structure arranged at one end of the pump body structure in a covering mode, a rear end cover structure arranged at the other end of the pump body structure in a covering mode and a fixing mechanism used for detachably fixing the front pump body structure and the rear end cover structure to the two ends of the pump body structure; sealing pieces are arranged between the pump body structure and the front pump body structure and between the pump body structure and the rear end cover structure; the fixing mechanism comprises two clamping rings arranged on the front pump body structure and the rear end cover structure in a sleeving mode and a fastening assembly used for adjusting the distance between the two clamping rings so as to achieve assembly and disassembly among the pump body structure, the front pump body structure and the rear end cover structure. Compared with the prior art, the plunger pump has the technical effects that through the modular design and the clamping ring fastening mechanism, the disassembly and assembly process of the plunger pump is greatly simplified, the maintenance efficiency is improved, and meanwhile, the sealing performance and the structural strength are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of plunger pumps, in particular to a plunger pump which is easy to install, disassemble and maintain. Background Art

[0002] As a common fluid conveying device, plunger pumps are widely used in the petroleum, chemical, and machinery manufacturing industries. Existing plunger pumps typically utilize flange or housing connections, with numerous bolts securing the various pump components (such as the cylinder, end cap, and valve block). This connection ensures structural sealing and stability.

[0003] However, in actual use, due to the harsh working environment of the plunger pump, wearing parts (such as seals, plungers, etc.) need to be regularly maintained or replaced. In the existing design, there are many bolts (usually a dozen or even dozens), which need to be loosened one by one during disassembly and tightened step by step in a specific order during installation. The operation is time-consuming and labor-intensive, greatly extending the maintenance time. Summary of the Invention

[0004] The purpose of the present invention is to provide a plunger pump which is easy to install and dismantle and maintain, and has the advantage of being able to achieve quick disassembly and assembly during maintenance, thereby improving installation and disassembly efficiency.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides the following technical solutions:

[0006] A plunger pump that is easy to install, disassemble and maintain, comprising a pump body structure, a front pump body structure covering one end of the pump body structure, a rear end cover structure covering the other end of the pump body structure, and a fixing mechanism for detachably fixing the front pump body structure and the rear end cover structure to the two ends of the pump body structure; sealing members are provided between the pump body structure and the front pump body structure and the rear end cover structure;

[0007] The fixing mechanism includes two clamping rings respectively mounted on the front pump body structure and the rear end cover structure, and a fastening assembly for adjusting the distance between the two clamping rings to achieve installation and removal between the pump body structure, the front pump body structure and the rear end cover structure.

[0008] In one embodiment of the present invention, the front pump body structure includes a front pump body, a first bearing clamped inside the front pump body, and a rotating shaft cooperating with the first bearing and rotatably connected to the front pump body;

[0009] The end of the rotating shaft is connected with a spline; the side wall of the front pump body is provided with a liquid suction port and a liquid discharge port.

[0010] In one embodiment of the present invention, a first sealing groove is provided on the front end surface of the pump body close to the spline side, and a first sealing member is provided in the first sealing groove.

[0011] In one embodiment of the present invention, the pump structure includes a pump housing, a second bearing clamped in the pump housing, a cylinder circumferentially fixed to the second bearing, a movable plate movably disposed on the cylinder, and a plurality of pistons inserted into the movable plate and cooperating with the cylinder;

[0012] The cylinder body is fixed to the spline circumferentially, a first mounting groove is provided at the end of the spline, a spring is provided in the mounting groove, a steel ball is connected to the top of the spring, and the steel ball is movably provided in the mounting groove; a second mounting groove that cooperates with the steel ball is provided at the bottom of the movable plate.

[0013] In one embodiment of the present invention, the cylinder body is axially provided with a plurality of cavities corresponding to the pistons one by one, and the pistons are assembled in the cavities and perform linear reciprocating motion in the cavities;

[0014] The bottom of the cavity is provided with a plurality of through holes which are in one-to-one communication with the plurality of cavities. When the cylinder rotates, there are always two through holes which are in communication with the liquid suction port and the liquid discharge port respectively.

[0015] In one embodiment of the present invention, the rear end cover structure includes a rear end cover and a slant plate obliquely arranged on the rear end cover, the rear end cover is circumferentially provided with a second sealing groove, and a second sealing member is arranged in the second sealing groove;

[0016] The piston end contacts the end surface of the swash plate.

[0017] In one embodiment of the present invention, the rear end cover structure is provided with a flow regulating mechanism for regulating the flow of the pump body;

[0018] The flow regulating mechanism includes a shell fixed on the rear end cover, a handle threadedly connected to the shell, and an adjusting plug rod rotatably connected to one end of the handle and movably arranged in the shell; a connecting rod is rotatably connected to the side wall of the adjusting plug rod, and one end of the connecting rod is connected to the swash plate.

[0019] In one embodiment of the present invention, a guide groove is provided on the housing, and a guide rod is fixedly provided on the adjusting plug rod and is slidably engaged with the guide groove. The guide rod slides in the guide groove to rotate the adjusting plug rod and adjust the inclination angle of the swash plate.

[0020] In one embodiment of the present invention, at least two fastening assemblies are connected between the two said clamping rings, and the fastening assemblies include two connecting rods movably connected to the clamping rings, two connecting plates movably connected to one end of the two connecting rods, and fasteners with both ends respectively engaged with the two connecting plates.

[0021] In one embodiment of the present invention, the fastener includes a screw and a nut fixed in the middle of the screw;

[0022] The screw rod is provided with a first thread segment and a second thread segment, and the thread directions of the first thread segment and the second thread segment are opposite.

[0023] As described above, the plunger pump of the present invention that is easy to install, disassemble and maintain has the following beneficial effects:

[0024] The plunger pump is divided into three modules as a whole: the pump body structure, the front pump body structure and the rear end cover structure, which is convenient for targeted maintenance of the plunger pump; and the pump body structure, the front pump body structure and the rear end cover structure can be quickly disassembled and installed through the fixing mechanism; when maintenance is required, only the nut needs to be screwed, and due to the setting of the screw structure, the two retaining rings can release the front pump body structure and the rear end cover structure, which is convenient for the disassembly of the front pump body structure, the pump body structure and the rear end cover structure; after the maintenance is completed, the three modules are reassembled together, and then the two retaining rings are respectively clamped on the front pump body structure and the rear cover structure, and the nut is screwed in the opposite direction. The screw can enable the retaining ring to lock and fix the three modules together; thereby realizing quick disassembly and installation of the plunger pump during maintenance, thereby improving installation and disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention;

[0026] Figure 2 is a schematic structural diagram of a fixing mechanism according to embodiment 1 of the present invention;

[0027] Figure 3 is a structural schematic diagram of a fastening assembly according to embodiment 1 of the present invention;

[0028] Figure 4 is a partial cross-sectional view of the overall structure of Example 1 of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the front pump body structure of Example 1 of the present invention;

[0030] Figure 6 1 is a schematic structural diagram of the pump body structure of Example 1 of the present invention;

[0031] Figure 7 1 is a schematic structural diagram of the rear end cover structure of Example 1 of the present invention;

[0032] Figure 8 1 is a schematic structural diagram of a flow regulating mechanism according to embodiment 1 of the present invention;

[0033] Figure 9 It is a structural schematic diagram of the fixing mechanism of Example 2 of the present invention.

[0034] Figure numerals: 1, pump body structure; 11, pump body shell; 12, second bearing; 13, cylinder body; 14, movable plate; 15, piston; 16, cavity; 2, front pump body structure; 21, front pump body; 22, first bearing; 23, rotating shaft; 24, spline; 25, suction port; 26, discharge port; 27, first sealing groove; 28, first sealing member; 29, steel ball; 3, rear end cover structure; 31, rear end cover; 32, swash plate; 321, arc shaft; 33, second sealing member Slot; 34, second sealing member; 4, fixing mechanism; 41, snap ring; 42, fastening assembly; 421, connecting rod; 4211, second sphere; 422, connecting plate; 423, fastener; 4231, screw; 4232, nut; 4233, first threaded segment; 4234, second threaded segment; 5, flow regulating mechanism; 51, housing; 52, handle; 53, adjusting plug rod; 54, connecting rod; 541, first sphere; 55, guide groove; 56, guide rod. DETAILED DESCRIPTION

[0035] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0036] See also Figures 1 to 9 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0037] Example 1

[0038] See also Figure 1 and Figure 4 The present invention provides a plunger pump that is easy to install, disassemble and maintain, comprising a pump body structure 1, a front pump body structure 2 covering one end of the pump body structure 1, a rear end cover structure 3 covering the other end of the pump body structure 1, and a fixing mechanism 4 for detachably fixing the front pump body structure 2 and the rear end cover structure 3 to the two ends of the pump body structure 1; sealing members are provided between the pump body structure 1 and the front pump body structure 2 and the rear end cover structure 3;

[0039] See also Figure 4 and Figure 5 The front pump body structure 2 includes a front pump body 21, a first bearing 22 and a rotating shaft 23. The first bearing 22 is installed inside the front pump body 21, wherein the rotating shaft 23 cooperates with the first bearing 22 and is rotatably connected to the front pump body 21. The rotating shaft 23 at one end outside the front pump body 21 is generally connected to a driving mechanism (motor) to drive the rotating shaft 23 to rotate; wherein a liquid suction port 25 and a liquid discharge port 26 are provided on the side wall of the front pump body 21;

[0040] A spline 24 is integrally formed at the end of the rotating shaft 23 located on one side of the interior of the front pump body 21. A first mounting groove is provided at the center of the end of the spline 24. A spring is provided in the first mounting groove. A steel ball 29 is connected to the top of the spring. The steel ball 29 is movably provided in the first mounting groove.

[0041] See also Figure 4 and Figure 6 The pump body structure 1 includes a pump body shell 11, a second bearing 12, a cylinder body 13, a movable plate 14 and a plurality of pistons 15, wherein the second bearing 12 is installed in the pump body shell 11, the cylinder body 13 and the second bearing 12 are circumferentially fixed, and the cylinder body 13 can be axially pulled and pulled; in this embodiment, an axial hole is provided in the center circumference of the cylinder body 13, and a flower groove that cooperates with the spline 24 is provided in the axial hole. The flower groove cooperates with the spline 24 to fix the cylinder body 13 and the spline 24 circumferentially, so that the rotating shaft 23 can drive the cylinder body 13 to rotate; the movable plate 14 is a conical structure, and one side of the tip of the movable plate 14 is movably mounted on the cylinder body 13, and the center of one side of the tip of the movable plate 14 is provided with a second mounting groove that cooperates with the steel ball 29; in this embodiment, a plurality of axially arranged jacks are provided on the movable plate 14, and a plurality of pistons 15 are respectively inserted in the plurality of jacks; so that the movement of the piston 15 is more stable;

[0042] In this embodiment, the cylinder body 13 is also provided with a plurality of axially arranged cavities 16, and the plurality of pistons 15 correspond to the plurality of cavities 16 one by one. The pistons 15 are assembled in the cavities 16 and perform linear reciprocating motion in the cavities 16;

[0043] The bottom of the cavity 16 is provided with a plurality of through holes connected to the plurality of cavities 16 one by one. When the cylinder 13 rotates, there are always two through holes connected to the liquid suction port 25 and the liquid discharge port 26 respectively, so as to realize the suction and discharge of liquid.

[0044] A first sealing groove 27 is provided on the end face of the front pump body 21 close to the spline 24, and a first sealing member 28 is provided in the first sealing groove 27; when the front pump body structure 2 is assembled with the pump body structure 1, the seal between the front pump body 21 and the pump body shell 11 can be strengthened to ensure the sealing between the two.

[0045] See also Figure 4 and Figure 7The rear end cover structure 3 includes a rear end cover 31 and a swash plate 32 obliquely arranged on the rear end cover 31, and the ends of several pistons 15 are in contact with the end surface of the swash plate 32; in this embodiment, the rear end cover 31 is circumferentially provided with a second sealing groove 33, and a second sealing member 34 is provided in the second sealing groove 33; the first sealing member 28 and the second sealing member 34 in this embodiment can be sealing rings; when the rear end cover structure 3 is assembled with the pump body structure 1, the seal between the rear end cover 31 and the pump body shell 11 can be strengthened to ensure the sealing between the two, thereby preventing pressure relief and liquid leakage.

[0046] See also Figure 4 and Figure 8 A flow regulating mechanism 5 for regulating the flow of the pump body is provided on the rear end cover structure 3; an arc-shaped shaft 321 is formed on each end of the swash plate 32 in this embodiment, and the inclination angle of the swash plate 32 can be adjusted by the flow regulating mechanism 5 to thereby adjust the movement of the piston 15 and control the flow of the plunger pump;

[0047] The flow regulating mechanism 5 includes a housing 51, a handle 52, and an adjusting plug rod 53. A connecting pipe is integrally formed at the center of the rear end cover 31, and the other end of the connecting pipe is integrally formed with the housing 51. The interior of the housing 51 is in a sealed state. The handle 52 is threadedly connected to the housing 51, and a dynamic seal can be used between the handle 52 and the housing 51. The other end of the handle 52 is rotatably connected to the adjusting plug rod 53, and the adjusting plug rod 53 is movably arranged in the housing 51. A connecting rod 54 is movably connected to the side wall of the adjusting plug rod 53. In this embodiment, a first sphere 541 is integrally formed at one end of the connecting rod 54, and a first movable groove is provided on the side wall of the adjusting plug rod 53, wherein the first sphere 541 is rotatably arranged in the first movable groove. The other end of the connecting rod 54 passes through the connecting pipe and is fixedly connected to the swash plate 32.

[0048] A guide frame is fixedly provided on the inner wall of the housing 51, and a guide groove 55 is provided on the guide frame. A guide rod 56 is fixedly provided on the adjusting rod and is slidably engaged with the guide groove 55. The guide rod 56 slides along the guide groove 55, causing the adjusting plug rod 53 to rotate and drive the swash plate 32 to adjust the angle, thereby changing the flow rate of the plunger pump.

[0049] See also Figure 1 、 Figure 2 and Figure 3, the fixing mechanism 4 includes two snap rings 41 respectively sleeved on the front pump body structure 2 and the rear end cover structure 3, and a fastening assembly 42 for adjusting the distance between the two snap rings 41 to realize the installation and disassembly between the pump body structure 1, the front pump body structure 2 and the rear end cover structure 3; wherein at least two fastening assemblies 42 are connected between the two snap rings 41. In this embodiment, due to the different diameters of the rear end cover 31 and the front pump body 21, the sizes of the two snap rings 41 are different. Each fastening assembly 42 includes two connecting rods 421, two connecting plates 422 and a fastener 423; wherein the two ends of the connecting rod 421 are integrally formed with a second sphere 4211, and the two snap rings 41 are integrally formed with a connecting ear, and the connecting ear is provided with a second movable groove, and the two connecting plates 422 A second movable groove is also provided on it, and the second spheres 4211 at both ends of the two connecting rods 421 are respectively movably arranged in the second movable grooves on the connecting ears and the connecting plates 422; the two ends of the fastener 423 are respectively engaged with the two connecting plates 422; the fastener 423 in this embodiment is a screw 4231 and a nut 4232 fixed to the middle part of the screw 4231; the screw 4231 is provided with a first thread segment 4233 and a second thread segment 4234, and the thread directions of the first thread segment 4233 and the second thread segment 4234 are opposite; when the nut 4232 is screwed, the screw 4231 drives the two connecting plates 422 to move toward or in the opposite direction, thereby tightening or loosening the retaining ring 41, thereby realizing rapid disassembly and assembly of the pump body structure 1, the front pump body structure 2 and the rear end cover structure 3.

[0050] Example 2

[0051] See also Figure 9 4234 , which has opposite thread directions.

[0052] Brief description of the usage process:

[0053] 1. Disassembly process: Loosen the nut 4232, and the screw 4231 drives the two retaining rings 41 to separate. The front pump body structure 2 and the rear end cover structure 3 can be easily removed, making it easy to inspect the internal components (such as the piston 15, seals, etc.);

[0054] 2. Installation process: After aligning the three modules, put on the snap ring 41, tighten the nut 4232, and screw 4231 to lock the snap ring 41 to ensure sealing and structural stability.

[0055] In summary, the present invention greatly simplifies the disassembly and assembly process of the plunger pump through modular design and the clamping ring 41 fastening mechanism, improves maintenance efficiency, and at the same time ensures sealing and structural strength, and is suitable for various industrial application scenarios.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A plunger pump that is easy to install, disassemble and maintain, characterized by: The invention comprises a pump body structure (1), a front pump body structure (2) provided at one end of the pump body structure (1), a rear end cover structure (3) provided at the other end of the pump body structure (1), and a fixing mechanism (4) for detachably fixing the front pump body structure (2) and the rear end cover structure (3) to the two ends of the pump body structure (1); sealing members are provided between the pump body structure (1) and the front pump body structure (2) and the rear end cover structure (3); The fixing mechanism (4) comprises two snap rings (41) respectively sleeved on the front pump body structure (2) and the rear end cover structure (3), and a fastening assembly (42) for adjusting the distance between the two snap rings (41) to achieve installation and removal between the pump body structure (1), the front pump body structure (2), and the rear end cover structure (3).

2. A plunger pump that is easy to install, disassemble and maintain according to claim 1, characterized in that: The front pump body structure (2) comprises a front pump body (21), a first bearing (22) clamped inside the front pump body (21), and a rotating shaft (23) matched with the first bearing (22) and rotatably connected to the front pump body (21); The end of the rotating shaft (23) is connected with a spline (24); and a liquid suction port (25) and a liquid discharge port (26) are provided on the side wall of the front pump body (21).

3. A plunger pump that is easy to install, disassemble and maintain according to claim 2, characterized in that: A first sealing groove (27) is provided on the end surface of the front pump body (21) close to the spline (24), and a first sealing member (28) is provided in the first sealing groove (27).

4. A plunger pump that is easy to install, disassemble and maintain according to claim 3, characterized in that: The pump body structure (1) comprises a pump body shell (11), a second bearing (12) clamped in the pump body shell (11), a cylinder body (13) circumferentially fixed to the second bearing (12), a movable plate (14) movably arranged on the cylinder body (13), and a plurality of pistons (15) inserted on the movable plate (14) and matched with the cylinder body (13); The cylinder body (13) is circumferentially fixed to the spline (24); a first mounting groove is provided at the end of the spline (24); a spring is provided in the first mounting groove; a steel ball (29) is connected to the top of the spring; the steel ball (29) is movably provided in the first mounting groove; and a second mounting groove cooperating with the steel ball (29) is provided at the bottom of the movable plate (14).

5. A plunger pump that is easy to install, disassemble and maintain according to claim 4, characterized in that: The cylinder (13) is axially provided with a plurality of cavities (16) corresponding one to one with the pistons (15), and the pistons (15) are assembled in the cavities (16) and perform linear reciprocating motion in the cavities (16); The bottom of the cavity (16) is provided with a plurality of through holes which are in one-to-one communication with the plurality of cavities (16). When the cylinder (13) rotates, there are always two through holes which are in communication with the liquid suction port (25) and the liquid discharge port (26) respectively.

6. A plunger pump that is easy to install, disassemble and maintain according to claim 5, characterized in that: The rear end cover structure (3) comprises a rear end cover (31) and a swash plate (32) obliquely arranged on the rear end cover (31); a second sealing groove (33) is circumferentially arranged on the rear end cover (31); a second sealing member (34) is arranged in the second sealing groove (33); and an end of the piston (15) contacts an end surface of the swash plate (32).

7. A plunger pump that is easy to install, disassemble and maintain according to claim 6, characterized in that: The rear end cover structure (3) is provided with a flow regulating mechanism (5) for regulating the flow of the pump body; The flow regulating mechanism (5) comprises a housing (51) fixed to the rear end cover (31), a handle (52) threadedly connected to the housing (51), and an adjusting plug rod (53) rotatably connected to one end of the handle (52) and movably arranged in the housing (51); a connecting rod (54) is rotatably connected to the side wall of the adjusting plug rod (53), and one end of the connecting rod (54) is connected to the swash plate (32).

8. The plunger pump that is easy to install, disassemble and maintain according to claim 7, characterized in that: The housing (51) is provided with a guide groove (55), and the regulating plug rod (53) is fixedly provided with a guide rod (56) that slides with the guide groove (55). The guide rod (56) slides in the guide groove (55) to rotate the regulating plug rod (53) and adjust the inclination angle of the swash plate (32).

9. The plunger pump that is easy to install, disassemble and maintain according to claim 1, characterized in that: At least two fastening assemblies (42) are connected between the two snap rings (41), and the fastening assemblies (42) include two connecting rods (421) movably connected to the snap rings (41), two connecting plates (422) movably connected to one end of the two connecting rods (421), and fasteners (423) with both ends meshedly connected to the two connecting plates (422).

10. The plunger pump that is easy to install, disassemble and maintain according to claim 9, characterized in that: The fastener (423) includes a screw rod (4231) and a nut (4232) fixed at the middle of the screw rod (4231); The screw rod (4231) is provided with a first thread segment (4233) and a second thread segment (4234), and the thread directions of the first thread segment (4233) and the second thread segment (4234) are opposite.

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