A high-temperature environment under continuous operation of high-pressure plunger pump
By incorporating a built-in water-cooled grille and cooling channels, the problem of insufficient cooling efficiency of high-pressure plunger pumps under high-temperature environments is solved, achieving stable operation and long service life of the equipment, and avoiding the reduction of lubricating oil viscosity and wear of moving parts.
Patent Information
- Application Number
- CN202522297876.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-30
AI Technical Summary
Existing high-pressure plunger pumps have insufficient cooling efficiency in high-temperature environments, resulting in large equipment system space requirements, lubrication failure, and wear of moving parts, which affects reliability and service life.
The cooling system employs a built-in water-cooled grille and built-in cooling chamber. Cooling water is distributed to the outside and inside of the pump body's power end through the water supply pipeline assembly, cooling the lubricating oil and crosshead assembly respectively. Combined with a spare water inlet interface, the flexibility and reliability of the cooling system are ensured.
It has achieved stable operation of high-pressure plunger pumps in high-temperature environments, controlled the temperature within the ideal range, extended the service life of the equipment, and improved the reliability of moving parts.
Smart Images
Figure CN224679669U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluid transport machinery technology, specifically to a high-pressure plunger pump that operates continuously under high-temperature conditions. Background Technology
[0002] High-pressure plunger pumps, as power units for industrial fluid transportation, are used in petrochemicals, energy extraction, high-pressure cleaning, and water jetting, undertaking the task of transporting high-pressure fluids. Their working principle involves converting rotation into the reciprocating motion of the plunger through a crankshaft and connecting rod mechanism, thereby pressurizing the fluid. During this process, the moving parts on the power end, such as the crankshaft, connecting rod, and crosshead, generate a large amount of heat due to high-speed friction.
[0003] Currently, mainstream heat dissipation methods have significant limitations. While external tube-and-shell coolers offer good cooling performance, they require independent oil pumps, coolers, and connecting pipelines, resulting in a complex system structure, large space requirements, and the risk of leaks. Air-cooled solutions, although simple in structure, suffer from reduced cooling efficiency at high ambient temperatures due to the small temperature difference, failing to meet heat dissipation demands. When the pump operates at ambient temperatures exceeding 65°C, the shortcomings of these cooling methods become even more pronounced. The lubricating oil temperature rises sharply to over 80°C, leading to a significant decrease in oil viscosity, reduced oil film carrying capacity, and the risk of abnormal wear on moving parts, severely impacting pump reliability and service life.
[0004] Therefore, how to provide a high-pressure plunger pump that can operate continuously in high-temperature environments and overcome the defects of existing structures is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0005] Therefore, this utility model provides a high-pressure plunger pump that can operate continuously in high-temperature environments, in order to solve the problems of large space occupation, lubrication failure and wear of moving parts caused by the large space occupied by the external cooling system and insufficient cooling efficiency in high-temperature environments in the prior art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model discloses a high-pressure plunger pump that operates continuously under high-temperature conditions, comprising: The pump body is equipped with a power end and a hydraulic end; A water delivery pipeline assembly is installed on the outer wall of the pump body. The water inlet of the water delivery pipeline assembly is connected to the hydraulic end of the pump body, and the water delivery pipeline assembly is provided with two water outlets. The first cooling mechanism is installed on the outer wall of the power end of the pump body, and the water inlet of the first cooling mechanism is connected to one water outlet of the water supply pipeline assembly. The second cooling mechanism is located inside the pump body, and the water inlet of the second cooling mechanism is connected to the other water outlet of the water supply pipeline assembly.
[0007] In one possible implementation, the pump body includes: The pump casing has crankshafts rotatably connected to its inner walls on both sides via bearings, and a valve assembly is detachably connected to the top of the pump casing. The crosshead assembly is rotatably connected to the crank pin of the crankshaft.
[0008] In one possible implementation, the water supply pipeline assembly includes: The first water inlet connector is installed on the hydraulic end of the pump body, and the water inlet end of the first water inlet connector is inserted into the hydraulic end; The three-way valve has its inlet end connected to the outlet end of the first inlet connector via a pipe, and its first outlet end connected to the inlet end of the second cooling mechanism. The first water outlet connector has its inlet end connected to the second water outlet end of the three-way valve via a pipe, and its outlet end is connected to the inlet end of the first cooling mechanism.
[0009] In one possible implementation, the first cooling mechanism includes: A water-cooled grille is installed on the outer wall of the power end of the pump casing; Several limiting holes penetrate the upper and lower walls of the water-cooled grille; A plurality of first cooling channels are formed within the water-cooled grid, the plurality of first cooling channels are arranged in a grid pattern, and the plane formed by the intersection of the axes of the plurality of first cooling channels is perpendicular to the axis direction of the limiting hole. The first water inlet channel is configured as one of several first cooling channels for water intake; The first water outlet channel is configured as one of several first cooling channels for water outlet; The water inlet end of the first water inlet channel is detachably connected to the water outlet end of the first water outlet connector, and the water outlet end of the first water outlet channel is detachably connected to a second water outlet connector.
[0010] In one possible implementation, the second cooling mechanism includes: Several second cooling channels are formed inside the pump housing, and the second cooling channels are arranged around the crosshead assembly; The second water inlet channel is configured as one of several second cooling channels for water intake; The second water outlet channel is configured as one of several second cooling channels for water outlet; The water inlet end of the second water inlet chamber is detachably connected to the first water outlet end of the three-way valve, and the water outlet end of the second water outlet chamber is detachably connected to a third water outlet connector.
[0011] In one possible implementation, the first cooling channel and the second cooling channel may also be detachably connected with plugs.
[0012] In one possible implementation, the valve assembly has a spare water inlet port on its sidewall.
[0013] This invention solves the problem of bulky traditional external coolers and oil pumps, resulting in a more rational plunger pump structure that saves installation space. Simultaneously, it cools the heat generated by friction between the connecting rod / crankshaft and the crosshead housing on the power end. This is achieved through water-cooled grilles cooling the lubricating oil and internal channels cooling the crosshead assembly, resulting in a short heat dissipation path and high efficiency, keeping the plunger pump's thermal equilibrium temperature within an ideal range. A backup water inlet ensures timely switching of the cooling water source in case of abnormalities in the main water inlet path, improving reliability in high-temperature environments. The removable plug at the end of the cooling channel facilitates later inspection, cleaning, and maintenance, preventing scale buildup and ensuring long-term cooling performance, thus extending the equipment's lifespan. Attached Figure Description
[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0016] Figure 1 A three-dimensional view of a high-pressure plunger pump that operates continuously under high temperature conditions, provided by this utility model; Figure 2 A perspective view of the first cooling mechanism, the second cooling mechanism, and the pump body provided for this utility model; Figure 3 A perspective view of the first cooling mechanism, the second cooling mechanism, and the water supply pipeline assembly provided for this utility model; Figure 4A cross-sectional view of the water-cooled grille provided for this utility model; In the diagram: 1 Pump body; 11 Pump casing; 12 Crankshaft; 13 Crosshead assembly; 14 Valve assembly; 141 Spare water inlet interface; 2 First cooling mechanism; 21 Water-cooled grille; 22 Limiting hole; 23 Second water outlet connector; 24 First cooling chamber; 241 First water inlet chamber; 242 First water outlet chamber; 3 Water supply pipeline assembly; 31 First water inlet connector; 32 Three-way valve; 33 First water outlet connector; 4 Second cooling mechanism; 41 Second cooling chamber; 411 Second water inlet chamber; 412 Second water outlet chamber; 42 Third water outlet connector; 5 Plug. Detailed Implementation
[0017] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0018] Please refer to Figures 1-4 The present invention discloses a high-pressure plunger pump that operates continuously under high temperature conditions. Figure 1 The system includes a pump body 1, a first cooling mechanism 2, a water supply pipeline assembly 3, and a second cooling mechanism 4. The pump body 1 is provided with a power end and a hydraulic end. The water supply pipeline assembly 3 is installed on the outer wall of the pump body 1. The water inlet end of the water supply pipeline assembly 3 is connected to the hydraulic end of the pump body 1. The water supply pipeline assembly 3 is provided with two water outlets. The first cooling mechanism 2 is installed on the outer wall of the power end of the pump body 1. The water inlet end of the first cooling mechanism 2 is connected to one water outlet end of the water supply pipeline assembly 3. The second cooling mechanism 4 is located inside the pump body 1. The water inlet end of the second cooling mechanism 4 is connected to the other water outlet end of the water supply pipeline assembly 3.
[0019] The pump body 1 serves as a platform, and the friction between the connecting rod and crankshaft at the power end and the crosshead housing is the primary source of heat. Cooling is achieved by drawing cooling water from the hydraulic end through the piping assembly 3 and diverting it via a three-way valve 32. This diverted cooling water is then distributed to the first cooling mechanism 2 and the second cooling mechanism 4, replacing the bulky external cooling mechanism and solving the space occupation problem. The diverted cooling water flows through the two cooling mechanisms. One path enters the first cooling mechanism 2, specifically the water-cooled grille cover (preferably made of aluminum) installed on the outside of the power end. Its internal mesh-like flow channels and grille design, which increases the heat dissipation area, cool the lubricating oil splashed onto it, thereby controlling the overall temperature of the power end. The other path enters the second cooling mechanism 4 inside the pump body, through the cooling channels surrounding the crosshead. The cooling water flowing within these channels carries away the frictional heat generated by the crosshead during operation. Through the coordinated work of these two cooling mechanisms, the entire pump is ultimately maintained within a stable temperature range under high-temperature conditions. This temperature range effectively maintains the viscosity of the lubricating oil and extends the service life of moving parts, making the entire pump more stable during operation.
[0020] In a specific embodiment, such as Figure 2 and Figure 3 The pump body 1 includes a pump housing 11, a crankshaft 12, a crosshead assembly 13, and a valve assembly 14. The crankshaft 12 is rotatably connected to the inner walls of both sides of the pump housing 11 via bearings. The valve assembly 14 is detachably connected to the top of the pump housing 11. The crosshead assembly 13 is rotatably connected to the crank pin of the crankshaft 12. The valve assembly 14, as a component mounted on the pump housing 11, provides a channel for fluid flow. The crankshaft 12 rotates under power, converting circular motion into reciprocating motion. The crosshead assembly 13, connected to the crank pin of the crankshaft, follows the linear reciprocating motion and drives the plunger at the hydraulic end. The pump housing 11, as a support structure, not only supports the rotation of the crankshaft 12 via bearings but also provides a channel for the linear motion of the crosshead assembly 13. This means that heat will be generated between the crankshaft 12 and the bearing, and between the pump housing 11 and the inner wall of the crosshead assembly 13 due to high-speed movement, which will cause the viscosity of the lubricating oil to change, thereby damaging the motion system. The cooling mechanism in this utility model is specifically designed for these two sources of concentrated heat generation in order to control the temperature of critical working areas.
[0021] In one specific embodiment, the water supply pipeline assembly 3 includes a first inlet connector 31, a three-way valve 32, and a first outlet connector 33. The first inlet connector 31 is installed on the hydraulic end of the pump body 1, with its inlet end inserted into the hydraulic end. The inlet end of the three-way valve 32 is connected to the outlet end of the first inlet connector 31 via a pipe, and the first outlet end of the three-way valve 32 is connected to the inlet end of the second cooling mechanism 4. The inlet end of the first outlet connector 33 is connected to the second outlet end of the three-way valve 32 via a pipe, and the outlet end of the first outlet connector 33 is connected to the inlet end of the first cooling mechanism 2. The first inlet connector 31 is directly connected to the hydraulic end of the pump and is responsible for drawing low-temperature medium water from the low-pressure chamber of the hydraulic end, utilizing the system's own initial cold source to simplify the complexity of the cooling equipment. The cooling water then enters the three-way valve 32, which acts as a distributor, dividing the single water path into two independent parallel cooling loops. One pipe is allocated to the second cooling mechanism 4 for direct cooling of the area where the crosshead assembly 13 is located, while the other is connected to the first water outlet 33, through which the water flow is guided to the first cooling mechanism 2. Through the combined work of these components, the water supply pipeline assembly 3 transforms the cold source obtained from the hydraulic end into a cooling flow for the two heat sources, representing a design that utilizes the cooling water drawn from the hydraulic end for highly efficient heat dissipation.
[0022] In one specific embodiment, the first cooling mechanism 2 includes a water-cooled grille 21, limiting holes 22, a second water outlet connector 23, a first cooling channel 24, a first water inlet channel 241, and a first water outlet channel 242. The water-cooled grille 21 is installed on the outer wall of the power end of the pump casing 11. Several limiting holes 22 penetrate the upper and lower walls of the water-cooled grille 21. Several first cooling channels 24 are opened in the water-cooled grille 21 and are arranged in a grid pattern. The plane formed by the intersection of the axes of the several first cooling channels 24 is perpendicular to the axis direction of the limiting holes 22. The first water inlet channel 241 is set as one of the several first cooling channels 24 for water inlet. The first water outlet channel 242 is set as one of the several first cooling channels 24 for water outlet. The water inlet end of the first water inlet channel 241 is detachably connected to the water outlet end of the first water outlet connector 33. The water outlet end of the first water outlet channel 242 is detachably connected to the second water outlet connector 23. The water-cooled grille 21 is stably mounted on the outer wall of the pump casing 11 through its limiting holes 22. The first cooling channels 24, machined internally in a grid pattern, increase the heat exchange area and improve the heat exchange efficiency. The flow path of the cooling water is controlled by specific channels. Cooling water introduced from the water supply pipeline assembly 3 first enters the first inlet channel 241, filling the grid-like cooling channels according to the bottom-in, top-out principle, thereby absorbing the heat transferred by the splashed lubricating oil. Finally, the warm water, after heat exchange, flows through the first outlet channel 242 and then exits from the second outlet connector 23, where it is further processed before being introduced into the pumping medium. The coordinated operation of these components creates a highly efficient and stable working environment for the first cooling mechanism 2, controlling the temperature of the power end within a reasonable temperature range.
[0023] In one specific embodiment, the second cooling mechanism 4 includes a second cooling chamber 41, a third water outlet connector 42, a second water inlet chamber 411, and a second water outlet chamber 412. Several second cooling chambers 41 are formed within the pump housing 11, surrounding the crosshead assembly 13. The second water inlet chamber 411 is one of several second cooling chambers 41 used for water intake, and the second water outlet chamber 412 is one of several second cooling chambers 41 used for water outlet. The water inlet end of the second water inlet chamber 411 is detachably connected to the first water outlet end of the three-way valve 32, and the water outlet end of the second water outlet chamber 412 is detachably connected to the third water outlet connector 42. The second cooling chamber 41 forms a water-cooled jacket within the primary heat source, creating the most direct heat exchange path. Cold water is guided by the second water inlet chamber 411, flowing from top to bottom, ensuring a stable flow path for the cooling water and carrying away the frictional heat generated by the high-speed movement of the crosshead. After heat exchange, the cooling water is introduced into the third outlet connector 42 through the second outlet chamber 412 and discharged from the system. After further treatment, it is introduced into the pumping medium. The coordinated operation of the above components transforms the fixed housing into part of the heat dissipation mechanism, thereby solving the problem of high-temperature environment and preventing the crosshead assembly from wearing due to overheating.
[0024] In one specific embodiment, the first cooling chamber 24 and the second cooling chamber 41 are also detachably connected with plugs 5. The function of plugs 5 is to ensure the convenience and feasibility of the cooling water circuit. The grid-like cooling chambers inside the first cooling mechanism 2 and the chambers surrounding the crosshead assembly of the second cooling mechanism 4 are designed to be through-type, in order to allow for more options in the cooling water circuit route. This, together with the detachable seal of plugs 5, forms a complete flow path. Furthermore, when the cooling water becomes clogged with scale or impurities due to long-term use, the plugs 5 at the corresponding positions can be removed to unclog and clean the chamber, thereby restoring the cooling effect. This design extends the service life of the plunger pump and ensures the product's service life and operational reliability.
[0025] In one specific embodiment, a backup water inlet port 141 is provided on the side wall of the valve assembly 14. This backup water inlet port 141 on the side wall of the valve assembly 14 allows the operator to connect a conduit from the side of the pump body through the backup water inlet port 141 to supply cooling water to the cooling mechanism when the main water inlet passage (the area connected to the first water inlet connector 31) fails to provide water. This design provides a backup solution for the cooling mechanism, facilitates on-site piping layout and emergency maintenance, and ensures the stability and flexibility of the plunger pump in the working environment.
[0026] The usage process of this utility model embodiment is as follows: Under normal operating conditions, the low-temperature medium at the hydraulic end is led out through the first inlet connector 31 of the water supply pipeline assembly 3, flows through the three-way valve 32 to split the flow, one path entering the first cooling mechanism 2. It flows from the first inlet channel 241 through the mesh-like first channel 24 of the water-cooled grille 21, cooling the splashed high-temperature lubricating oil following a bottom-in, top-out flow pattern. The other path enters the second cooling mechanism 4, flowing in from the second inlet channel 411, directly carrying away the heat generated by friction around the crosshead assembly 13. The two cooling mechanisms work together to control the temperature of the plunger pump within a safe range. Furthermore, when the main water inlet path malfunctions, an external water source is connected through the backup water inlet 141 on the side wall of the valve assembly 14 to maintain cooling. Each cooling chamber is equipped with a removable plug 5 at its end, facilitating cleaning and maintenance of the chambers and ensuring stable operation of the cooling system.
[0027] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A high-pressure plunger pump that operates continuously under high-temperature conditions, characterized in that, include: The pump body (1) is equipped with a power end and a hydraulic end; Water supply pipeline assembly (3) is installed on the outer wall of the pump body (1). The water inlet of the water supply pipeline assembly (3) is connected to the hydraulic end of the pump body (1). The water supply pipeline assembly (3) is provided with two water outlets. The first cooling mechanism (2) is installed on the outer wall of the power end of the pump body (1), and the water inlet of the first cooling mechanism (2) is connected to one water outlet of the water supply pipeline assembly (3); The second cooling mechanism (4) is located inside the pump body (1), and the water inlet of the second cooling mechanism (4) is connected to the other water outlet of the water supply pipeline assembly (3).
2. The high-pressure plunger pump that operates continuously under high temperature conditions as described in claim 1, characterized in that, The pump body (1) includes: The pump housing (11) has a crankshaft (12) rotatably connected to its inner walls on both sides via bearings, and a valve assembly (14) is detachably connected to the top of the pump housing (11). The crosshead assembly (13) is rotatably connected to the crank pin of the crankshaft (12).
3. The high-pressure plunger pump that operates continuously under high temperature conditions as described in claim 2, characterized in that, The water supply pipeline assembly (3) includes: The first water inlet connector (31) is installed at the hydraulic end of the pump body (1), and the water inlet end of the first water inlet connector (31) is inserted into the hydraulic end; The inlet end of the three-way valve (32) is connected to the outlet end of the first inlet connector (31) via a pipe, and the first outlet end of the three-way valve (32) is connected to the inlet end of the second cooling mechanism (4). The first water outlet connector (33) has its inlet end connected to the second water outlet end of the three-way valve (32) via a pipe, and the water outlet end of the first water outlet connector (33) is connected to the water inlet end of the first cooling mechanism (2).
4. The high-pressure plunger pump that operates continuously under high temperature conditions as described in claim 3, characterized in that, The first cooling mechanism (2) includes: A water-cooled grille (21) is installed on the outer wall of the power end of the pump casing (11); Several limiting holes (22) penetrate the upper and lower walls of the water-cooled grille (21); A plurality of first cooling channels (24) are formed within the water-cooled grid (21). The plurality of first cooling channels (24) are arranged in a grid pattern. The plane formed by the intersection of the axes of the plurality of first cooling channels (24) is perpendicular to the axial direction of the limiting hole (22). The first water inlet channel (241) is configured as one of the plurality of first cooling channels (24) for water inlet; The first water outlet channel (242) is configured as one of the plurality of first cooling channels (24) for water outlet; The water inlet end of the first water inlet channel (241) is detachably connected to the water outlet end of the first water outlet connector (33), and the water outlet end of the first water outlet channel (242) is detachably connected to the second water outlet connector (23).
5. The high-pressure plunger pump that operates continuously under high temperature conditions as described in claim 4, characterized in that, The second cooling mechanism (4) includes: A plurality of second cooling channels (41) are formed within the pump housing (11), the second cooling channels (41) being arranged around the crosshead assembly (13); The second water inlet channel (411) is configured as one of a plurality of second cooling channels (41) for water inlet; The second water outlet channel (412) is configured as one of the several second cooling channels (41) for water outlet; The water inlet end of the second water inlet channel (411) is detachably connected to the first water outlet end of the three-way valve (32), and the water outlet end of the second water outlet channel (412) is detachably connected to a third water outlet connector (42).
6. The high-pressure plunger pump that operates continuously under high temperature conditions as described in claim 5, characterized in that, The first cooling cavity (24) and the second cooling cavity (41) are also detachably connected with plugs (5).
7. The high-pressure plunger pump that operates continuously under high temperature conditions as described in claim 5, characterized in that, The valve assembly (14) has a spare water inlet port (141) on its side wall.