Plunger pump
By adopting a two-stage spring structure in the plunger pump and using hydraulic devices to promote the rebound force of the second-stage spring, the efficient push of the plunger rod is achieved, and the problems of limited motor thrust and difficult to continuously output in the existing technology are solved, and efficient and economical large thrust output is achieved.
Patent Information
- Application Number
- CN202510129854.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2025-04-22
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When existing plunger pumps obtain high pressure, the motor thrust is limited, the cost is high and it is difficult to achieve continuous output, and the hydraulic device is difficult to maintain the continuous output of pressure after it is pushed to a fixed position.
The two-stage spring structure is adopted, and the secondary spring is pushed through a hydraulic device. The rebound force of the secondary spring acts on the physical partition. The physical partition directly pushes the plunger rod, and the plunger rod further pushes the liquid to generate pressure. At the same time, the first-stage spring pushes the plunger rod back to position after the hydraulic device removes the pressure.
It realizes a relatively unlimited thrust output, reduces the cost of achieving high pressure, and maintains a certain continuous output through the spring's rebound force, which is suitable for use scenarios under extreme pressure.
Smart Images
Figure CN119860330A_ABST
Abstract
Description
Technical Field
[0001] This patent mainly relates to a plunger pump. Background Art
[0002] The plunger pump is a commonly used fluid conveying device, which is generally driven by a motor or a motor combined with a worm. The upper limit of the pressure output of the plunger pump depends on the material used or the thrust that the motor can provide. Generally speaking, the thrust provided by the motor is limited by cost and design, and there is an upper limit; or the cost of excessive thrust output is too high. This patent provides a device that provides thrust for the plunger pump through a two-stage spring. Through hydraulic devices, such as jacks, relatively unlimited thrust can be obtained in a low-cost manner.
[0003] According to the pressure calculation formula P=F / S (pressure = pressure / force area), under the premise of a certain piston rod propulsion area (generally speaking, S is relatively small), assuming that the outflow volume of the fluid is much smaller than the propulsion volume of the piston rod, since the fluid itself is almost incompressible, the thrust of the hydraulic device or the combined hydraulic device is almost completely converted into pressure. Since the output of the hydraulic device or the combined hydraulic device is almost unlimited, the plunger pump can easily obtain a pressure far exceeding the material limit.
[0004] If the plunger rod is directly pushed by a hydraulic device, the upper limit thrust of the hydraulic device can limit the maximum pressure that the plunger pump can obtain. The pressure must be within the allowable range of the materials of the plunger rod and the plunger pump cavity. However, the design of the hydraulic device itself generally requires that it be used below the upper limit, otherwise it is easy to retract and shorten the service life. In addition, after the hydraulic device, such as a jack, is pushed to a fixed position, it is difficult to maintain continuous output of pressure.
[0005] Therefore, this patent introduces a heavy-load spring, which indirectly limits the maximum output of thrust (i.e., the maximum rebound force of the spring); at the same time, it can maintain the continuous output of elastic force for a period of time after the hydraulic device stops moving. Through another level of spring, the plunger rod can automatically return to its original position after the hydraulic device releases force.
[0006] Compared with the implementation cost of the original plunger pump motor propulsion, the combination of hydraulic device and heavy-load spring will be much more economical, easy to achieve large thrust output, and more suitable for use scenarios under extreme pressure. Summary of the invention
[0007] The invention discloses a plunger pump, which mainly comprises a plunger rod, a plunger pump cavity, a two-stage spring and a thrust device.
[0008] Each stage of the two-stage spring can be composed of one or more springs and play different roles. Among them, there is a physical partition at the end of the plunger rod away from the plunger pump cavity, which is connected to the plunger rod and moves synchronously. The primary spring is located between the physical partition and the plunger pump cavity, and the secondary spring is located between the thrust device and the physical partition. When the thrust device pushes the secondary spring, the secondary spring is compressed, and the rebound force of the secondary spring acts on the physical partition. The physical partition directly pushes the plunger rod, and the plunger rod further pushes the liquid to generate pressure. At the same time, the physical partition compresses the primary spring. Since the liquid is incompressible (micro), the required pressure can be obtained under the drive of the plunger pump. When the thrust device removes the pressure, the secondary spring pressure is also removed, and the primary spring pushes the plunger rod to move in the opposite direction through the physical partition, so that the plunger rod returns to its position.
[0009] Since the rebound force of the spring can be calculated according to the compression ratio of the spring, the total rebound force of the two-stage spring can be calculated separately according to the compression ratio of the spring. The rebound force of the secondary spring minus the rebound force of the primary spring is the theoretical thrust of the plunger rod, which can be divided by the area of the plunger rod to obtain the theoretical pressure of the fluid.
[0010] The elastic force of the spring itself is reproducible within its service life, so the final output pressure of the plunger pump can be indicated by the compression distance. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 A schematic diagram of the structure of the plunger pump provided by the present invention. DETAILED DESCRIPTION
[0012] The plunger pump of the present invention will be further described below in conjunction with the accompanying drawings.
[0013] like Figure 1As shown, it is a schematic diagram of the structure of a plunger pump provided by the present invention, which mainly includes a plunger pump fluid outlet 1, a plunger pump cavity 2, a plunger rod 3, a primary spring 4, a physical partition 5 (wherein the physical partition can be designed as an integral whole with the plunger rod, or locked together by a mechanical device for synchronous movement), a secondary spring 6 and a thrust device 7. The thrust device can be a hydraulic device, a screw and an electromagnetic force propulsion device, etc. Take the jack in the hydraulic device as an example to describe the specific fluid output process. The plunger pump cavity is used to accommodate the plunger rod, the primary spring is used to reset the plunger rod, the secondary spring is used to provide the plunger rod thrust, and the physical partition distinguishes the primary spring and the secondary spring by function. Before the plunger pump outputs the pressurized fluid, the plunger pump cavity is filled with fluid, the plunger rod is partially placed in the plunger pump cavity, the primary spring is inserted into the plunger rod, and is located between the plunger pump cavity and the physical partition, and the secondary spring is located between the thrust device and the physical partition. First, the jack pushes the secondary spring to move, the secondary spring is compressed, and a rebound force is generated to act on the physical partition. The physical partition pushes the plunger rod to push the fluid to generate high-pressure fluid (the forward volume of the plunger rod is generally much smaller than the outflow volume of the fluid), and compresses the primary spring at the same time. When the liquid delivery is completed, the hydraulic device removes the pressure, and the pressure of the secondary spring in contact with the hydraulic device is removed and rebounds, and the physical partition is reset by the rebound force of the primary spring.
[0014] The present invention is not limited to the above-mentioned embodiments, and all embodiments obtained without any creative work are within the protection scope of the present invention.
Claims
1. A plunger pump structure, characterized in that: The thrust and reset reverse thrust of the plunger rod are provided by a two-stage spring; the two-stage spring is functionally differentiated by a physical partition, the first-stage spring is used for resetting the plunger rod, and the second-stage spring is used for providing thrust for the plunger rod.
2. The plunger pump according to claim 1, characterized in that The thrust can be provided to the secondary spring by a hydraulic device, a screw or an electromagnetic force. When the thrust acts on the secondary spring, the spring is compressed, and the physical partition is pushed by the spring rebound force to provide direct thrust to the plunger rod, and the partition simultaneously compresses the primary spring; when the thrust is withdrawn, the secondary spring and the primary spring rebound at the same time, and the primary spring pushes the partition to drive the plunger rod to reset; each level of spring can be composed of one or more springs.
3. The plunger pump according to claim 1, characterized in that The thrust acts on the secondary spring, and the total elastic force of the secondary spring minus the rebound force of the primary spring is the final thrust of the plunger rod; the thrust acting on the plunger rod can be calculated through the compression ratio of the two-stage spring, and finally the required pressure can be reached; by superimposing heavy-load springs, there is theoretically no upper limit to the thrust, and the ultimate pressure under the limitation of existing materials can be obtained.
4. The plunger pump according to claim 1, characterized in that The material of the plunger pump cavity can be hard materials such as ceramics, hard plastics, alloys, etc.; the material of the plunger rod can be hard materials such as ceramics, hard plastics, alloys, etc.
5. The plunger pump according to claim 1, characterized in that The contact point between the plunger rod and the plunger pump cavity can be sealed by a sealing ring or a combination of multiple sealing rings to ensure that there is no leakage.
6. The plunger pump according to claim 1, characterized in that Independent or shared fluid interfaces can be reserved for liquid replenishment, liquid output, and pressure relief. The interfaces can be in a fully open, partially open, or fully closed state, depending on functional requirements.
7. The plunger pump according to claim 1, characterized in that A pressure gauge can be connected and a positioning mark showing the amount of spring compression can be added to monitor the real-time pressure; a filter can be built into the flow path to protect the plunger rod and sealing ring and extend the service life of the plunger pump.