Plunger pump assembly and hydraulic system

Abstract

The utility model relates to the technical field of hydraulic pressure provides a kind of plunger pump assembly and hydraulic system.In plunger pump assembly, between power component and pump body, support protection seat is set, and plunger rod is penetrated in the process of extending to the outside of pump body in this support protection seat, not only plunger rod is provided with effective radial support, plunger rod in high speed or high load reciprocating process is significantly enhanced the stability and anti-yaw ability, effectively reduce vibration and eccentric wear phenomenon, to reduce the risk of sealing failure;Meanwhile, the support protection seat also constitutes the physical barrier of plunger rod exposed part, can effectively block the direct invasion and attachment of external pollutants such as dust, coal dust and the like in mine, greatly reduce the wear of pollutant to plunger rod surface and sealing element, significantly improve sealing reliability, prolong the service life of sealing element and plunger rod, and finally greatly improve its overall operation reliability and durability under harsh working conditions.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, and in particular to a piston pump assembly and hydraulic system. Background Technology

[0002] As a common fluid transport device, the core working mechanism of a plunger pump relies on a power mechanism to drive the plunger to reciprocate within the pump cylinder, thereby achieving the function of periodically drawing in and discharging liquid. In existing technologies, to achieve power transmission, the plunger rod is typically designed to extend directly through the intermediate housing and into the plunger bore of the plunger cylinder and pump head, forming a rigid connection with the power end. This structure results in the plunger rod portion within the intermediate housing lacking radial support during reciprocating motion. This leads to significantly insufficient stability and support for the plunger rod under high-speed or high-load conditions, easily causing vibration, uneven wear, and seal failure. Consequently, the risk of leakage increases, seal life is shortened, and ultimately, the overall reliability and service life of the pump are affected. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a plunger pump assembly and a hydraulic system.

[0004] In a first aspect, this utility model provides a plunger pump assembly, comprising: a pump body; a support and protection seat disposed outside the pump body; a power assembly disposed between the pump body and the support and protection seat; a plunger slidably disposed within the pump body; and a plunger rod, a first end of which is connected to the plunger, and a second end of which extends outside the pump body, passes through the support and protection seat, and is connected to the power assembly.

[0005] According to the present invention, a plunger pump assembly includes a support and protection seat comprising: a support seat having a support guide groove thereon, wherein the plunger rod is slidably connected to the support guide groove; and a protective cover plate covering the support seat and together with the support seat surrounding the outside of the plunger rod.

[0006] According to the present invention, a plunger pump assembly further includes a pump head assembly, which is connected to the pump body and is used for liquid suction or discharge.

[0007] According to the present invention, a plunger pump assembly is provided, the pump head assembly comprising: a pump head body connected to the pump body, the pump head body having a discharge channel and a suction channel; a discharge valve disposed within the discharge channel; and a suction valve disposed within the suction channel.

[0008] According to the present invention, a plunger pump assembly is provided, wherein the pump head assembly further includes: a discharge check valve disposed in the discharge channel; and a suction check valve disposed in the suction channel.

[0009] According to the present invention, a plunger pump assembly is provided, wherein the power assembly includes: an electric cylinder connected to the plunger rod; and a motor connected to the electric cylinder.

[0010] According to the present invention, a plunger pump assembly includes an electric cylinder comprising: a lead screw connected to a motor; an actuating connecting rod connected to the lead screw; and a second end of the plunger rod passing through the support and protection seat and connected to the actuating connecting rod.

[0011] According to the present invention, a plunger pump assembly is provided, wherein there are multiple pump bodies connected in parallel, and each pump body is provided with a plunger, a plunger rod, a pump head assembly, a support and protection seat, and a power assembly.

[0012] According to the present invention, a plunger pump assembly further includes: a discharge hose for connecting the discharge channels of each of the pump heads; and a suction hose for connecting the suction channels of each of the pump heads.

[0013] A second aspect of this invention provides a hydraulic system comprising a piston pump assembly as described above.

[0014] The plunger pump assembly provided by this utility model includes a pump body, a support and protection seat, a power component, a plunger, and a plunger rod. The support and protection seat and the power component are both located on the outside of the pump body, with the support and protection seat positioned between the power component and the support and protection seat. A plunger is slidably disposed within the pump body. One end of the plunger rod is connected to the plunger, and the other end extends from the inside of the pump body to the outside of the pump body, passes through the support and protection seat, and then connects to the power component. The support and protection seat provides support and protection for the plunger rod.

[0015] As described above, by setting a support and protective seat between the power assembly and the pump body, and allowing the plunger rod to pass through the support and protective seat as it extends to the outside of the pump body, effective radial support is provided for the plunger rod, significantly enhancing its stability and anti-sway capability during high-speed or high-load reciprocating motion. This effectively reduces vibration and uneven wear, thereby lowering the risk of seal failure. Simultaneously, the support and protective seat also constitutes a physical barrier for the exposed portion of the plunger rod, effectively preventing the direct intrusion and adhesion of external pollutants such as mine dust and coal dust. This greatly reduces the wear of pollutants on the plunger rod surface and seals, significantly improving sealing reliability, extending the service life of the seals and plunger rod, and ultimately greatly enhancing its overall operational reliability and durability under harsh working conditions.

[0016] Furthermore, the hydraulic system provided by this utility model, since it includes the piston pump assembly as described above, also possesses the advantages described above. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the plunger pump assembly provided by this utility model. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of the plunger pump assembly provided by this utility model. Figure 2 .

[0020] Figure 3 This is a partial structural diagram of the pump head assembly in the plunger pump assembly provided by this utility model.

[0021] Reference numerals: 100, pump body; 200, power unit; 300, support and protection seat; 400, pump head body; 500, drain valve; 600, suction valve. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0025] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, to make the objectives, technical solutions, and advantages of the present invention clearer. The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The following is combined Figures 1 to 3 This invention describes a plunger pump assembly and hydraulic system provided by an embodiment of the present invention. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0028] An embodiment of the first aspect of this utility model provides a plunger pump assembly, such as... Figure 1 and Figure 2 As shown, it includes: a pump body 100; a support and protection seat 300, which is disposed on the outside of the pump body 100; a power assembly 200, which is disposed between the pump body 100 and the support and protection seat 300; a plunger, which is slidably disposed inside the pump body 100; and a plunger rod, the first end of which is connected to the plunger, and the second end of which extends to the outside of the pump body 100 and passes through the support and protection seat 300 to connect with the power assembly 200.

[0029] The plunger pump assembly provided by this utility model includes a pump body 100, a support and protection seat 300, a power component 200, a plunger, and a plunger rod. Both the support and protection seat 300 and the power component 200 are disposed on the outside of the pump body 100, with the support and protection seat 300 located between the power component 200 and the support and protection seat 300. A plunger is slidably disposed within the pump body 100. One end of the plunger rod is connected to the plunger, and the other end of the plunger rod extends from the inside of the pump body 100 to the outside of the pump body 100, passes through the support and protection seat 300, and then connects to the power component 200. The support and protection seat 300 provides support and protection for the plunger rod.

[0030] As described above, by setting a support and protection seat 300 between the power assembly 200 and the pump body 100, and allowing the plunger rod to pass through the support and protection seat 300 as it extends to the outside of the pump body 100, effective radial support is provided for the plunger rod, significantly enhancing its stability and anti-sway capability during high-speed or high-load reciprocating motion, effectively reducing vibration and uneven wear, thereby reducing the risk of seal failure. Simultaneously, the support and protection seat 300 also constitutes a physical barrier for the exposed portion of the plunger rod, effectively preventing the direct intrusion and adhesion of external pollutants such as mine dust and coal dust, greatly reducing the wear of pollutants on the plunger rod surface and seals, significantly improving sealing reliability, extending the service life of the seals and plunger rod, and ultimately greatly improving the overall operational reliability and durability of the plunger pump assembly under harsh operating conditions.

[0031] In one embodiment of the present invention, the support and protection seat 300 includes: a support seat, on which a support guide groove is provided, and a plunger rod is slidably connected to the support guide groove; and a protective cover plate, which covers the support seat and together with the support seat surrounds the outside of the plunger rod.

[0032] In another embodiment of this utility model, the support and protection seat 300 includes a support seat and a protective cover plate, with a support guide groove formed between the support seat and the protective cover plate. Specifically, the support guide groove includes a first half-groove and a second half-groove. The first half-groove extends to the upper side of the support seat, and the second half-groove extends to the lower side of the protective cover plate. The two halves connect to form a support guide groove adapted to the plunger rod. The plunger rod can be supported within the support guide groove and slide along it. The support guide groove provides support and guidance for the plunger rod, and the protective cover plate provides a certain degree of sealing protection for the plunger rod.

[0033] In one embodiment of the present invention, the plunger pump assembly further includes a pump head assembly, which is connected to the pump body 100 and is used for liquid suction or discharge.

[0034] In one embodiment of this utility model, such as Figure 3 As shown, the pump head assembly includes: a pump head body 400, which is connected to the pump body 100, and the pump head body 400 is provided with a drain channel and a suction channel; a drain valve 500, which is disposed in the drain channel; and a suction valve 600, which is disposed in the suction channel.

[0035] In one embodiment of this utility model, the pump head assembly further includes: a discharge check valve disposed in the discharge channel; and a suction check valve disposed in the suction channel.

[0036] During operation, the power unit 200 drives the plunger rod to reciprocate, causing the plunger to slide within the pump body 100. When the pump chamber volume increases and negative pressure is created, the suction valve 600 in the suction channel opens, and the suction check valve allows liquid to flow in. The discharge valve 500 closes, and the discharge check valve prevents backflow, allowing liquid to be drawn into the pump chamber. When the pump chamber volume decreases and the pressure increases, the suction valve 600 closes, and the suction check valve prevents backflow. The discharge valve 500 opens, and the discharge check valve allows liquid to pass through, allowing high-pressure liquid to be discharged through the discharge channel. The support and protection seat 300 provides stable support and protection for the external power unit 200. The pump body 100 and the pump head body 400 together form a sealed working chamber. The suction / discharge valve 500 controls the opening and closing of the channel, and the suction / discharge check valve ensures unidirectional liquid flow, thereby achieving the function of continuous liquid intake and discharge.

[0037] In one embodiment of the present invention, the power assembly 200 includes: an electric cylinder connected to a piston rod; and a motor connected to the electric cylinder.

[0038] Furthermore, in one embodiment of this utility model, the electric cylinder includes: a lead screw connected to a motor; an actuating connecting rod connected to the lead screw; and a second end of a plunger rod passing through a support protection seat 300 and connected to the actuating connecting rod.

[0039] During operation, the motor drives the lead screw to rotate, and the lead screw can drive the plunger rod to move within the pump body 100 through the actuator connecting rod to perform liquid suction or discharge.

[0040] Compared to traditional crank-connecting rod mechanisms, setting the power component 200 as an electric cylinder plus motor offers advantages such as high control precision, compact structure, high efficiency and low noise operation, low maintenance requirements, and strong intelligent integration capabilities. It is particularly suitable for high-precision, low-pulse, and automated fluid transport scenarios.

[0041] In one embodiment of this utility model, there are multiple pump bodies 100, which are arranged in parallel. Each pump body 100 is equipped with a plunger, plunger rod, pump head assembly, support and protection seat 300 and power assembly 200.

[0042] Furthermore, in one embodiment of the present invention, the plunger pump assembly further includes: a discharge hose for connecting the discharge channels of each pump head; and a suction hose for connecting the suction channels of each pump head.

[0043] For example, such as Figure 1As shown, in this embodiment, two pump bodies 100 are connected in parallel. Each pump body 100 is equipped with a set of plungers, plunger rods, pump head assemblies, support and protection seats 300, and power components 200. The drainage channels in the two pump heads are connected by a drainage hose, and the suction channels in the two pump heads are connected by a suction hose.

[0044] In actual use, the number of pump bodies 100 can be adjusted according to actual needs, and some pump bodies 100 can also be used as spare pump bodies 100. In addition, since the drainage channels are connected by drainage hoses and the suction channels are connected by suction hoses, the positions of each pump body 100, support and protection seat 300 and power component 200 can be flexibly arranged according to the working conditions.

[0045] A second aspect of this utility model provides a hydraulic system including a piston pump assembly as described above.

[0046] Furthermore, the hydraulic system provided by this utility model, since it includes the piston pump assembly as described above, also possesses the advantages described above.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plunger pump assembly, characterized in that, include: Pump body (100); A support and protection seat (300) is provided on the outside of the pump body (100); A power assembly (200) is disposed between the pump body (100) and the support and protection seat (300); A plunger, which is slidably disposed within the pump body (100); A plunger rod, the first end of which is connected to the plunger, and the second end of which extends outside the pump body (100) and passes through the support protection seat (300) and is connected to the power assembly (200).

2. The plunger pump assembly according to claim 1, characterized in that, The support and protective base (300) includes: A support base, wherein a support guide groove is provided on the support base, and the plunger rod is slidably connected to the support guide groove; A protective cover plate is provided, which covers the support seat and together with the support seat surrounds the outside of the plunger rod.

3. The plunger pump assembly according to claim 2, characterized in that, The plunger pump assembly also includes: A pump head assembly, which is connected to the pump body (100) and is used for suction or discharge of liquid.

4. The plunger pump assembly according to claim 3, characterized in that, The pump head assembly includes: Pump head body (400), the pump head body (400) is connected to the pump body (100), and the pump head body (400) is provided with a drain channel and a suction channel; A drain valve (500) is disposed within the drain channel; A suction valve (600) is disposed within the suction channel.

5. The plunger pump assembly according to claim 4, characterized in that, The pump head assembly also includes: A drain check valve is disposed within the drain channel; A liquid suction check valve is disposed within the liquid suction channel.

6. The plunger pump assembly according to claim 3, characterized in that, The power assembly (200) includes: An electric cylinder, wherein the electric cylinder is connected to the plunger rod; An electric motor, which is connected to the electric cylinder.

7. The plunger pump assembly according to claim 6, characterized in that, The electric cylinder includes: A lead screw, which is connected to the motor; An actuator connecting rod is connected to the lead screw; The second end of the plunger rod passes through the support protection seat (300) and is connected to the execution connecting rod.

8. The plunger pump assembly according to any one of claims 3 to 7, characterized in that, The number of pump bodies (100) is multiple, and the multiple pump bodies (100) are arranged in parallel. Each pump body (100) is correspondingly equipped with the plunger, the plunger rod, the pump head assembly, the support and protection seat (300) and the power assembly (200).

9. The plunger pump assembly according to claim 8, characterized in that, The plunger pump assembly also includes: A drain hose, which is used to connect the drain channels of each of the pump heads; A suction hose is used to connect the suction channels of each of the pump heads.

10. A hydraulic system, characterized in that, include: The plunger pump assembly as described in any one of claims 1 to 9.

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