Plunger pump device

Abstract

The plunger pump device comprises a plunger pump body and a cooling device, the plunger pump body comprises a plunger pump cylinder body, a plunger, a lining, a sealing assembly and a cooling flow channel, and the cooling device comprises a liquid storage tank, a circulating pump, a heat exchanger and a pipeline; the circulating pump is a peripheral pump and comprises a pump shell, an impeller, a liquid inlet pipe, a liquid outlet pipe and a partition part, and the partition part is arranged between the liquid inlet pipe and the liquid outlet pipe; the device is characterized by further comprising an adjusting valve element and a communicating hole, the communicating hole is formed in the partition part, the two ends of the communicating hole are communicated with the liquid inlet pipe and the liquid outlet pipe respectively, the adjusting valve element is movably connected into the communicating hole, and the adjusting valve element adjustably extends into the liquid outlet pipe, the communicating hole and / or the liquid inlet pipe. The plunger pump can adjust the liquid inlet flow, the liquid outlet flow and the pressure of the circulating pump / peripheral pump, and has the advantages of stable output flow and pressure, so that the cooling effect on the plunger pump cylinder body and / or the sealing assembly can be improved, the operation stability of the plunger pump is improved, and the service life of the plunger pump is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, and in particular to a plunger pump device. Background Art

[0002] The existing plunger pump device comprises a plunger pump body and a cooling device. The plunger pump body comprises a plunger pump cylinder, a plunger, a bushing, a sealing assembly, and a cooling channel. A bushing and a sealing assembly are installed between the plunger and the plunger pump cylinder. A cooling channel is arranged in the plunger pump cylinder. The cooling channel has a first liquid inlet and a first liquid outlet. The sealing assembly is connected to a second liquid inlet and a second liquid outlet. The cooling device comprises a first liquid storage tank, a first circulating pump, a first heat exchanger, a first pipeline, a second liquid storage tank, a second circulating pump, a second heat exchanger, and a second pipeline. One end of the first pipeline is connected to the first liquid inlet, and the other end is connected to the first liquid outlet. The first pipeline is connected to the first liquid storage tank, the first circulating pump, the first heat exchanger, and a control valve. One end of the second pipeline is connected to the second liquid inlet, and the other end is connected to the second liquid outlet. The second pipeline is connected to the second liquid storage tank, the second circulating pump, the second heat exchanger, and a control valve.

[0003] The circulation pump is a vortex pump, which includes a pump housing, an impeller, a rotating shaft, a liquid inlet pipe, a liquid outlet pipe, and a partition. The impeller is mounted on the rotating shaft and rotatably mounted in the pump housing. The impeller includes a wheel disc and blades arranged on the outer periphery of the wheel disc. Two groups of blades are respectively arranged on the two sides of the wheel disc. The pump housing is provided with a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe and the liquid outlet pipe are arranged in parallel and radially. A partition is arranged between the liquid inlet pipe and the liquid outlet pipe. The pump housing is provided with a pump cavity annular flow channel, and the pump cavity annular flow channel is arranged corresponding to the blades on the outer periphery of the wheel disc. However, the cooling device of the existing plunger pump device still has the problems that the inlet / outlet flow rate and pressure of the circulation pump / vortex pump are poor or complicated to adjust, the flow loss in the pump cavity annular flow channel is large, and the cooling effect and service life of the plunger pump need to be further improved. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a plunger pump device which can adjust the inlet and outlet flow rates, inlet and outlet pressures of a circulating pump / vortex pump, and has the advantages of stable output flow and pressure, thereby improving the cooling effect on the plunger pump cylinder and / or sealing assembly, improving the cooling effect of the plunger pump, and improving the operating stability and service life of the plunger pump.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A plunger pump device, comprising a plunger pump body and a cooling device, wherein the plunger pump body comprises a plunger pump cylinder, a plunger, a bushing, a sealing assembly, and a cooling channel, wherein a bushing and a sealing assembly are installed between the plunger and the plunger pump cylinder, wherein a cooling channel is arranged in the plunger pump cylinder, wherein the cooling channel has a first liquid inlet and a first liquid outlet, and wherein the sealing assembly is connected to a second liquid inlet and a second liquid outlet; the cooling device comprises a first liquid storage tank, a first circulating pump, a first heat exchanger, a first pipeline, a second liquid storage tank, a second circulating pump, a second heat exchanger, and a second pipeline, wherein one end of the first pipeline is connected to the first liquid inlet, and the other end is connected to the first liquid outlet, and the first pipeline is connected to the first liquid storage tank, the first circulating pump, the first heat exchanger, and a control valve; one end of the second pipeline is connected to the second liquid inlet, and the other end is connected to the second liquid outlet, and the second pipeline is connected to the second liquid storage tank, the first circulating pump, the first heat exchanger, and the control valve. Two circulation pumps, a second heat exchanger, and a control valve; the first circulation pump and / or the second circulation pump is a vortex pump, which includes a pump casing, an impeller, a rotating shaft, a liquid inlet pipe, a liquid outlet pipe, and a partition part. The impeller is mounted on the rotating shaft and rotatably mounted in the pump casing. The impeller includes a wheel disc and blades arranged on the outer periphery of the wheel disc. Two groups of blades are respectively arranged on the two sides of the wheel disc. The pump casing is provided with a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe and the liquid outlet pipe are arranged in parallel and radially. A partition part is arranged between the liquid inlet pipe and the liquid outlet pipe. The pump casing is provided with a pump chamber annular flow channel, and the pump chamber annular flow channel is arranged corresponding to the blades on the outer periphery of the wheel disc; it is characterized in that it also includes a regulating valve core and a connecting hole. A connecting hole is opened on the partition part, and the two ends of the connecting hole are respectively connected to the liquid inlet pipe and the liquid outlet pipe. The regulating valve core is movably connected to the connecting hole, and the regulating valve core can be adjusted to extend into the liquid outlet pipe, the connecting hole and / or the liquid inlet pipe.

[0006] Furthermore, a protruding connecting seat is provided on the liquid outlet pipe, an adjusting seat is connected to the connecting seat, a regulating valve core is movably connected to the inner hole of the regulating seat, the regulating valve core can move along the axial direction of the connecting hole, and one or more sealing elements are provided between the inner hole of the adjusting seat and the outer peripheral surface of the regulating valve core.

[0007] Furthermore, by adjusting the regulating valve core to move, in the first working condition, the regulating valve core extends into the liquid outlet pipe and the connecting hole; in the second working condition, the regulating valve core only extends into the liquid outlet pipe; in the third working condition, the regulating valve core extends into the liquid outlet pipe, the connecting hole and the liquid inlet pipe.

[0008] Furthermore, the regulating valve core has an external thread, the regulating valve core is threadedly connected to the regulating seat, and a wrench groove is provided on the right end face of the regulating valve core, so that the regulating valve core can be moved left and right by rotating the regulating valve core.

[0009] Furthermore, the right end of the regulating valve core is connected to a linear driver, and the linear driver is used to drive the regulating valve core to move left and right.

[0010] Furthermore, in the circumferential direction, the intersection of the liquid inlet pipe and the pump chamber annular flow channel is defined as 0°, and the intersection of the liquid outlet pipe and the pump chamber annular flow channel is defined as 300°. When the pump chamber annular flow channel changes from 0° to 300°, the cross-sectional area of ​​the pump chamber annular flow channel generally shows a decreasing trend.

[0011] Furthermore, the pump chamber annular flow channel includes a first flow channel section, a second flow channel section, and a third flow channel section which are connected in sequence. When the pump chamber annular flow channel changes from 0° to 300°, the cross-sectional area of ​​the first flow channel section gradually decreases, the cross-sectional area of ​​the second flow channel section remains unchanged, and the cross-sectional area of ​​the third flow channel section gradually decreases.

[0012] Furthermore, in the circumferential direction, the first flow channel segment occupies a range of 0°-120°, the second flow channel segment occupies a range of 120°-180°, and the third flow channel segment occupies a range of 180°-300°; the remaining 60° range in the circumferential direction is symmetrically arranged with the 60° range occupied by the second flow channel segment.

[0013] A plunger pump device of the present invention is designed through the regulating valve core and connecting hole of the circulation pump / vortex pump. Specifically, a connecting hole is opened on the partition part, and the two ends of the connecting hole are respectively connected to the liquid inlet pipe and the liquid outlet pipe. The regulating valve core is movably connected to the connecting hole, and the regulating valve core is adjustably extended into the liquid outlet pipe, the connecting hole and / or the liquid inlet pipe. The present invention can simultaneously adjust the flow of the liquid inlet pipe and the liquid outlet pipe through a single regulating valve core, thereby adjusting the inlet and outlet flow rates, inlet and outlet pressures of the circulation pump / vortex pump, and has the advantages of stable output flow and pressure, thereby improving the cooling effect of the plunger pump cylinder and / or the sealing component, improving the cooling effect of the plunger pump, and improving the operating stability and service life of the plunger pump.

[0014] The present invention can reduce flow losses in the pump chamber annular flow channel and the influence of boundary layer thickness through the design of the pump chamber annular flow channel, specifically the pump chamber annular flow channel includes a first flow channel section, a second flow channel section, and a third flow channel section connected in sequence, thereby improving the stability of the pump output flow rate and pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the cooling device of the plunger pump device of the present invention; Figure 2 It is a schematic structural diagram of a circulating pump in a first adjustment state of a cooling device of the present invention; Figure 3 It is a schematic structural diagram of the second adjustment state of the circulating pump of the cooling device of the present invention; Figure 4 It is a schematic structural diagram of the third adjustment state of the circulating pump of the cooling device of the present invention; Figure 5 The figure is a schematic diagram of the structure of the annular flow channel of the pump chamber of the circulating pump of the present invention.

[0016] In the figure: plunger pump cylinder 1, plunger 2, bushing 3, sealing assembly 4, cooling channel 5, first liquid storage tank 6, first circulation pump 7, first heat exchanger 8, second liquid storage tank 9, second circulation pump 10, second heat exchanger 11; pump casing 71, impeller 72, rotating shaft 73, liquid inlet pipe 74, liquid outlet pipe 75, partition part 76, regulating valve core 77, connecting hole 78, regulating seat 79, connecting seat 710, sealing element 711, pump chamber annular flow channel S, first flow channel section S1, second flow channel section S2, third flow channel section S3. DETAILED DESCRIPTION

[0017] In order to make the technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present invention, which are only used to explain the present invention, not to limit the present invention. It should be noted that, for the convenience of description, only the parts / structures related to the present invention are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0018] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention should be the common meanings understood by ordinary technicians in the field to which the present invention belongs.

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1-5As shown, a plunger pump device includes a plunger pump body and a cooling device. The plunger pump body includes a plunger pump cylinder 1, a plunger 2, a bushing 3, a sealing assembly 4, and a cooling channel 5. The bushing 3 and the sealing assembly 4 are installed between the plunger 2 and the plunger pump cylinder 1. The bushing 3 and the sealing assembly 4 are separately arranged along the axial direction of the plunger 2. The cooling channel 5 is arranged in the plunger pump cylinder 1. The cooling channel 5 has a first liquid inlet and a first liquid outlet. The sealing assembly 4 is connected to a second liquid inlet and a second liquid outlet; the cooling device includes a first liquid storage tank 6, The first circulation pump 7, the first heat exchanger 8, the first pipeline, the second liquid storage tank 9, the second circulation pump 10, the second heat exchanger 11, and the second pipeline, one end of the first pipeline is connected to the first liquid inlet, and the other end is connected to the first liquid outlet, the first pipeline is connected with the first liquid storage tank 6, the first circulation pump 7, the first heat exchanger 8, and the control valve; one end of the second pipeline is connected to the second liquid inlet, and the other end is connected to the second liquid outlet, the second pipeline is connected with the second liquid storage tank 9, the second circulation pump 10, the second heat exchanger 11, and the control valve.

[0021] The first circulation pump 7 and / or the second circulation pump 10 is a vortex pump, which includes a pump housing 71, an impeller 72, a rotating shaft 73, a liquid inlet pipe 74, a liquid outlet pipe 75, and a partition 76. The impeller 72 is mounted on the rotating shaft 73 and rotatably mounted in the pump housing 71. The impeller 72 includes a wheel disc and blades arranged on the outer periphery of the wheel disc. Two groups of blades are respectively arranged on the two sides of the wheel disc (the blade structure of a known vortex pump). The pump housing 71 is provided with a liquid inlet pipe 74 and a liquid outlet pipe 75. The liquid inlet pipe 74 and the liquid outlet pipe 75 are arranged substantially parallel to each other and arranged radially. A partition portion 76 is provided between the liquid inlet pipe 74 and the liquid outlet pipe 75, and the pump housing 71 is provided with / formed with a pump chamber annular flow channel S, which is arranged corresponding to the blades on the outer periphery of the wheel; it is characterized in that it also includes a regulating valve core 77 and a connecting hole 78, a connecting hole 78 is opened on the partition portion 76, and the two ends of the connecting hole 78 are respectively connected to the liquid inlet pipe 74 and the liquid outlet pipe 75, the regulating valve core 77 is movably connected to the connecting hole 78, and the regulating valve core 77 can be adjusted to extend into the liquid outlet pipe 75, the connecting hole 78 and / or the liquid inlet pipe 74.

[0022] A plunger pump device of the present invention is designed with a regulating valve core 77 and a connecting hole 78 of a circulating pump / vortex pump. Specifically, a connecting hole 78 is opened on a partition portion 76, and two ends of the connecting hole 78 are respectively connected to a liquid inlet pipe 74 and a liquid outlet pipe 75. The regulating valve core 77 is movably connected to the connecting hole 78, and the regulating valve core 77 is adjustably extended into the liquid outlet pipe 75, the connecting hole 78 and / or the liquid inlet pipe 74. The present invention can simultaneously adjust the flow of the liquid inlet pipe 74 and the liquid outlet pipe 75 through a single regulating valve core 77, thereby adjusting the inlet and outlet flow rates, inlet and outlet pressures of the circulating pump / vortex pump, and has the advantages of stable output flow and pressure, thereby improving the cooling effect on the plunger pump cylinder 1 and / or the sealing component 4, improving the cooling effect of the plunger pump, and improving the operating stability and service life of the plunger pump.

[0023] Furthermore, a protruding connecting seat 710 is provided on the liquid outlet pipe 75, and an adjusting seat 79 is connected to the connecting seat 710 through an internal thread. A regulating valve core 77 is movably installed / connected in the inner hole of the regulating seat 79, and the regulating valve core 77 can move along the axial direction of the connecting hole 78. One or more sealing elements 711 are provided between the inner hole of the regulating seat 79 and the outer peripheral surface of the regulating valve core 77.

[0024] In one embodiment, the regulating valve core 77 is moved by adjusting the regulating valve core 77 so that in the first working condition, the regulating valve core 77 extends into the liquid outlet pipe 75 and the communicating hole 78; in the second working condition, the regulating valve core 77 only extends into the liquid outlet pipe 75; in the third working condition, the regulating valve core 77 extends into the liquid outlet pipe 75, the communicating hole 78 and the liquid inlet pipe 74. Figure 2-4 shown.

[0025] The regulating valve core 77 has an external thread, and the regulating valve core 77 is threadedly connected to the regulating seat 79. A wrench groove is provided on the right end surface of the regulating valve core 77. The regulating valve core 77 can be moved left and right by rotating the regulating valve core 77.

[0026] In one embodiment, the right end of the regulating valve core 77 is connected to a linear driver, and the linear driver is used to drive the regulating valve core 77 to move left and right.

[0027] In one embodiment, in the circumferential direction, the intersection of the liquid inlet pipe 74 and the pump chamber annular flow channel S is defined as 0°, and the intersection of the liquid outlet pipe 75 and the pump chamber annular flow channel S is defined as 300°. When the pump chamber annular flow channel S changes from 0°→300°, the cross-sectional area of ​​the pump chamber annular flow channel S generally shows a decreasing trend.

[0028] Furthermore, the pump chamber annular flow channel S includes a first flow channel segment S1, a second flow channel segment S2, and a third flow channel segment S3 which are connected in sequence. When the pump chamber annular flow channel S is from 0° to 300°, the cross-sectional area of ​​the first flow channel segment S1 gradually decreases, the cross-sectional area of ​​the second flow channel segment S2 remains unchanged, and the cross-sectional area of ​​the third flow channel segment S3 gradually decreases. Figure 2 , 5 shown.

[0029] In the circumferential direction, the first flow channel segment S1 occupies a range of 0°-120°, the second flow channel segment S2 occupies a range of 120°-180°, and the third flow channel segment S3 occupies a range of 180°-300°; the remaining 60° range in the circumferential direction is symmetrically arranged with the 60° range occupied by the second flow channel segment S2, such as Figure 2 , 5 shown.

[0030] The present invention can reduce the flow loss in the pump chamber annular flow channel S and the influence of the boundary layer thickness through the design of the pump chamber annular flow channel S, specifically the pump chamber annular flow channel S includes a first flow channel section S1, a second flow channel section S2, and a third flow channel section S3 connected in sequence, thereby improving the stability of the pump output flow rate and pressure.

[0031] A plunger pump device of the present invention is designed with a regulating valve core 77 and a connecting hole 78 of a circulating pump / vortex pump. Specifically, a connecting hole 78 is opened on a partition portion 76, and two ends of the connecting hole 78 are respectively connected to a liquid inlet pipe 74 and a liquid outlet pipe 75. The regulating valve core 77 is movably connected to the connecting hole 78, and the regulating valve core 77 is adjustably extended into the liquid outlet pipe 75, the connecting hole 78 and / or the liquid inlet pipe 74. The present invention can simultaneously adjust the flow of the liquid inlet pipe 74 and the liquid outlet pipe 75 through a single regulating valve core 77, thereby adjusting the inlet and outlet flow rates, inlet and outlet pressures of the circulating pump / vortex pump, and has the advantages of stable output flow and pressure, thereby improving the cooling effect on the plunger pump cylinder 1 and / or the sealing component 4, improving the cooling effect of the plunger pump, and improving the operating stability and service life of the plunger pump.

[0032] The present invention can reduce the flow loss in the pump chamber annular flow channel S and the influence of the boundary layer thickness through the design of the pump chamber annular flow channel S, specifically the pump chamber annular flow channel S includes a first flow channel section S1, a second flow channel section S2, and a third flow channel section S3 connected in sequence, thereby improving the stability of the pump output flow rate and pressure.

[0033] The above-mentioned implementation modes are for explanation of the present invention rather than limitation of the present invention. It can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plunger pump device, comprising a plunger pump body and a cooling device, wherein the plunger pump body comprises a plunger pump cylinder (1), a plunger (2), a bushing (3), a sealing assembly (4), and a cooling channel (5), wherein a bushing and a sealing assembly are installed between the plunger and the plunger pump cylinder, wherein a cooling channel is arranged in the plunger pump cylinder, wherein the cooling channel has a first liquid inlet and a first liquid outlet, and wherein the sealing assembly is connected to a second liquid inlet and a second liquid outlet; wherein the cooling device comprises a first liquid storage tank (6), a first circulating pump (7), a first heat exchanger (8), a first pipeline, a second liquid storage tank (9), a second circulating pump (10), a second heat exchanger (11), and a second pipeline, wherein one end of the first pipeline is connected to the first liquid inlet, and the other end is connected to the first liquid outlet, and the first pipeline is connected to the first liquid storage tank, the first circulating pump, the first heat exchanger, and a control valve; and wherein the second One end of the pipeline is connected to the second liquid inlet, and the other end is connected to the second liquid outlet. The second pipeline is connected to a second liquid storage tank, a second circulation pump, a second heat exchanger, and a control valve. The first circulation pump (7) and / or the second circulation pump (10) is a vortex pump, which comprises a pump housing (71), an impeller (72), a rotating shaft (73), a liquid inlet pipe (74), a liquid outlet pipe (75), and a partition (76). The impeller is mounted on the rotating shaft and rotatably mounted in the pump housing. The impeller comprises a wheel disc and blades arranged on the outer periphery of the wheel disc. Two groups of blades are respectively arranged on two side surfaces of the wheel disc. The pump housing is provided with a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe and the liquid outlet pipe are arranged in parallel and radially. A partition is arranged between the liquid inlet pipe and the liquid outlet pipe. The pump housing is provided with a pump cavity annular flow channel (S). The pump cavity annular flow channel is arranged corresponding to the blades on the outer periphery of the wheel disc. The characteristics are as follows: It also includes a regulating valve core (77) and a communicating hole (78). The partition portion is provided with a communicating hole, and the two ends of the communicating hole are respectively connected to a liquid inlet pipe and a liquid outlet pipe. The regulating valve core is movably connected to the communicating hole, and the regulating valve core is adjustably extended into the liquid outlet pipe, the communicating hole and / or the liquid inlet pipe.

2. A plunger pump device as claimed in claim 1, characterized in that: The liquid outlet pipe (75) is provided with a protruding connection seat (710), an adjustment seat (79) is connected to the connection seat, an adjustment valve core (77) is movably connected to the inner hole of the adjustment seat, the adjustment valve core is movable along the axial direction of the connecting hole (78), and one or more sealing elements (711) are provided between the inner hole of the adjustment seat and the outer peripheral surface of the adjustment valve core.

3. A plunger pump device as claimed in claim 2, characterized in that: The regulating valve core (77) is adjusted to move so that in a first working condition, the regulating valve core extends into the liquid outlet pipe (75) and the communication hole (78); in a second working condition, the regulating valve core only extends into the liquid outlet pipe (75); and in a third working condition, the regulating valve core extends into the liquid outlet pipe (75), the communication hole (78) and the liquid inlet pipe (74).

4. A plunger pump device as claimed in claim 3, characterized in that: The regulating valve core (77) has an external thread, and is threadedly connected to the regulating seat (79). A wrench groove is provided on the right end surface of the regulating valve core, and the regulating valve core can be moved left and right by rotating the regulating valve core.

5. A plunger pump device as claimed in claim 3, characterized in that: The right end of the regulating valve core (77) is connected to a linear driver, and the linear driver is used to drive the regulating valve core to move left and right.

6. A plunger pump device according to claim 4 or 5, characterized in that: In the circumferential direction, the intersection of the liquid inlet pipe (74) and the pump chamber annular flow channel (S) is defined as 0°, and the intersection of the liquid outlet pipe (75) and the pump chamber annular flow channel is defined as 300°. When the pump chamber annular flow channel is from 0° to 300°, the cross-sectional area of ​​the pump chamber annular flow channel generally shows a decreasing trend.

7. A plunger pump device as claimed in claim 6, characterized in that: The pump chamber annular flow channel (S) comprises a first flow channel section (S1), a second flow channel section (S2), and a third flow channel section (S3) which are connected in sequence. When the pump chamber annular flow channel is angled from 0° to 300°, the cross-sectional area of ​​the first flow channel section gradually decreases, the cross-sectional area of ​​the second flow channel section remains unchanged, and the cross-sectional area of ​​the third flow channel section gradually decreases.

8. A plunger pump device as claimed in claim 7, characterized in that: In the circumferential direction, the first flow channel section (S1) occupies a range of 0°-120°, the second flow channel section (S2) occupies a range of 120°-180°, and the third flow channel section (S3) occupies a range of 180°-300°; the remaining 60° range in the circumferential direction is symmetrically arranged with the 60° range occupied by the second flow channel section.

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