A crankshaft pump assembly

Abstract

This invention relates to the field of variable displacement pump technology and discloses a crankshaft pump assembly, including a housing. Within the housing are a plunger pump assembly and a crankshaft drive assembly. The plunger pump assembly includes a pump cylinder and a plunger. A transfer chamber is located at the bottom of the pump cylinder, and a gap-sealing chamber is located between the transfer chamber and the pump cylinder. A gap-sealing assembly is located at the bottom of the plunger, including a connecting seat and a slip ring. The slip ring and the connecting seat are connected by multiple elastic connecting pieces. A flexible filter screen is installed in the gap between the slip ring and the connecting seat. This invention utilizes a flexible filter screen to completely seal the gap between the plunger and the gap-sealing chamber. During the downward movement of the plunger, solid particles are prevented from moving towards the outer wall area of ​​the plunger, avoiding collisions and damage to the outer surface of the plunger caused by harder solid particles. This further improves the service life of the plunger and the sliding sealing assembly, enhancing the long-term sealing effectiveness of the crankshaft pump.

Description

Technical Field

[0001] This invention relates to the field of variable displacement pump technology, and more specifically, to a crankshaft pump assembly. Background Technology

[0002] A crankshaft pump (also known as a crankshaft-type piston pump) is a positive displacement pump that uses a crankshaft connecting rod mechanism to convert the rotary motion of an electric motor into the reciprocating motion of a piston. It is the most common structural form of high-pressure piston pumps. The motor drives the crankshaft to rotate, and the crankshaft, through the connecting rod, drives the piston to perform reciprocating linear motion within the pump cylinder. Due to the crankshaft connecting rod mechanism, multiple pump cylinders can be simultaneously set up to work synchronously with the pistons, forming continuous pumping. Furthermore, the overall stress distribution on the pistons is relatively good, resulting in relatively stable operation (especially in multi-piston designs such as three-piston, five-piston, and nine-piston pumps). It can withstand extremely high working pressures and is therefore widely used in industrial cleaning and rust removal, petrochemical and metallurgical industries, water treatment, and environmental protection.

[0003] In order to ensure the effective sealing of the pump body itself, the fit between the plunger and the pump cylinder of the above-mentioned crankshaft pump is different from that of the conventional piston. The sealing structure of the plunger and the pump cylinder is mainly set in the inner wall of the pump cylinder. The sealing structure is relatively fixed so as to provide effective lubrication and sealing for the moving plunger and prevent the lubricating medium from mixing with the pumped liquid medium.

[0004] For some special operating conditions, such as when the pumped liquid contains solid particles (e.g., silt or other special substances), although a certain filtration structure can be used to filter the liquid before it enters the pump, filtration errors are inevitable due to various reasons. This can cause some smaller particles to enter the transfer chamber at the bottom of the pump cylinder. When the plunger moves, it can easily cause the liquid in the transfer chamber to flow erratically, which can cause some particles to impact and scratch the plunger surface, or even adhere to the plunger. When the plunger carries these particles toward the sealing structure, it can also damage the sealing structure. Over time, this can easily lead to seal failure and reduce the service life of the equipment. Summary of the Invention

[0005] The present invention provides a crankshaft pump assembly that addresses the problem that small particles can enter existing crankshaft pumps and cause impact scratches on the piston surface. Over time, this can lead to seal failure and reduce the service life of the equipment.

[0006] This invention provides a crankshaft pump assembly, including a housing, within which a plunger pump assembly and a crankshaft drive assembly are disposed. The plunger pump assembly includes a pump cylinder and a plunger. The pump cylinder is fixedly installed inside the housing, and the plunger is slidably installed inside the pump cylinder. A sliding sealing assembly adapted to the pump cylinder is disposed in the inner wall of the pump cylinder. A transfer chamber is disposed at the bottom of the pump cylinder, and a gap-filling chamber is disposed between the transfer chamber and the pump cylinder. A gap-blocking assembly is disposed at the bottom of the plunger. The gap-blocking assembly includes a connecting seat and a slip ring. The connecting seat is installed at the bottom end of the plunger, and the slip ring slides in contact with the inner wall of the gap-filling chamber. The slip ring and the connecting seat are connected by multiple elastic connecting pieces, which have upward and downward bending deformation capabilities. A flexible filter screen is disposed in the gap between the slip ring and the connecting seat.

[0007] In a preferred embodiment, the crankshaft drive assembly is used to drive the plunger to reciprocate within the pump cylinder. The crankshaft drive assembly includes a crankshaft, a connecting rod, and a linear slider. The crankshaft is rotatably mounted within the housing and has a drive shaft portion that interfaces with an external motor. The connecting rod is rotatably connected to the connecting rod journal on the crankshaft. The linear slider is slidably mounted within the housing, with one end of the connecting rod away from the crankshaft rotatably connected to the linear slider. The plunger is fixedly connected to the linear slider. The bottom of the housing has an inlet chamber and an outlet chamber. A first check valve is installed between the intermediate transfer chamber and the inlet chamber, and between the intermediate transfer chamber and the outlet chamber.

[0008] In a preferred embodiment, the connecting seat is provided with guide holes at the areas corresponding to each elastic connecting piece, one end of the elastic connecting piece extends into the guide hole and is fixedly connected to a guide block, the guide block is slidably installed in the guide hole, and an elastic pusher is provided between the guide block and the connecting seat. The elastic pusher is used to provide an outward elastic force to the guide block, and the area of ​​the slip ring corresponding to the inner wall of the joint cavity is set as an arc-shaped outer wall.

[0009] In a preferred embodiment, a guide post is fixedly connected to the top of the connector, the guide post is movably inserted into the bottom end of the plunger, a spiral guide bar is fixedly connected to the outside of the guide post, a spiral groove that matches the spiral guide bar is provided inside the plunger, a limit protrusion is fixedly connected to the outer wall of the guide post, a limit stop is fixedly installed at the position of the plunger corresponding to the limit protrusion, and a reset elastic element is provided between the guide post and the plunger to provide a reset elastic force to the guide post.

[0010] In a preferred embodiment, a heat dissipation cavity is provided in the area corresponding to the plunger inside the housing. The heat dissipation cavity and the parts of the housing corresponding to the liquid inlet chamber, liquid outlet chamber and transfer chamber are provided with a heat insulation structure. Multiple sets of horizontally arranged fins are provided on the outer wall of the pump cylinder. The fins are metal sheet structures. A heat dissipation window is provided in the housing at the position corresponding to the heat dissipation cavity. A cooling fan is fixedly installed in one of the heat dissipation windows.

[0011] In a preferred embodiment, the crankshaft pump assembly further includes a pumping detection component, which includes a detection chamber fixedly installed at the connection port of the inlet chamber. The detection chamber is equipped with detection sensors, including a temperature sensor and a pressure sensor.

[0012] In a preferred embodiment, the plunger has an annular slit inside, located near the outer wall of the plunger. A variable displacement cavity is provided inside the plunger corresponding to the top of the guide post. The reset elastic element includes an elastic membrane with elasticity that deforms in the vertical direction. The elastic membrane is fixedly installed inside the variable displacement cavity and forms a seal on the lower part of the variable displacement cavity. A connecting post is rotatably installed on the top of the guide post, and the middle part of the elastic membrane is fixedly connected to the connecting post. A first flow channel communicating with the variable displacement cavity and the annular slit is provided in the plunger, and a second flow channel communicating with the outside is provided on the top of the plunger.

[0013] In a preferred embodiment, the first flow channel is provided in two sets, and a second one-way valve is installed on each of the two sets of first flow channels. The allowed flow direction of one set of second one-way valves is the direction of flow from the first flow channel corresponding to the second one-way valve to the inside of the variable volume cavity, and the allowed flow direction of the other set of second one-way valves is the direction of flow from the variable volume cavity to the inside of the first flow channel corresponding to the second one-way valve.

[0014] In a preferred embodiment, a cooling fluid supply assembly is provided inside the housing. The cooling fluid supply assembly includes multiple sets of flat storage tanks. Two sets of second flow channels are provided. The two sets of second flow channels are respectively connected to the flat storage tanks through a set of connecting hoses. A third check valve is installed on each set of second flow channels. The allowable flow direction of one set of third check valves is from the outside to the inside of the set of second flow channels, and the allowable flow direction of the other set of third check valves is from the inside of the set of second flow channels to the outside.

[0015] In a preferred embodiment, multiple sets of flat storage devices are vertically distributed in the heat dissipation cavity inside the casing, near the heat dissipation fan. The flat storage devices have a flat cavity structure, store water inside, and are arranged in parallel and interconnected with each other.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention, by setting a slip ring that fits snugly against the inner wall of the slot-filling cavity and using a flexible filter to completely seal the gap between the plunger and the slot-filling cavity, can prevent solid particles from moving towards the outer wall area of ​​the plunger during its downward movement. This avoids damage caused by collisions between harder solid particles and the outer surface of the plunger, and also prevents solid particles adhering to the plunger surface from entering between the plunger and the sliding seal assembly when the plunger moves upward, thus affecting the sealing of the sliding seal assembly. This further improves the service life of the plunger and the sliding seal assembly, and enhances the long-term sealing effectiveness of the crankshaft pump.

[0018] This invention effectively dissipates heat from the pump cylinder by setting a heat dissipation cavity inside the housing, and by performing corresponding heat dissipation operations inside the plunger, it can effectively reduce the expansion and deformation of the plunger, avoid excessive tightness between the plunger and the sliding sealing assembly, reduce the wear of the sliding sealing assembly, and ensure the sealing effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a cross-sectional view from the side perspective of the present invention.

[0021] Figure 3 This is a cross-sectional view of the present invention from the frontal viewpoint.

[0022] Figure 4 For the present invention Figure 3 Enlarged view of the structure of part A.

[0023] Figure 5 This is a bottom view of the gap-blocking assembly of the present invention.

[0024] Figure 6 This is a schematic diagram showing the changes in the gap assembly after a sudden stop during the plunger descent process of the present invention.

[0025] Figure 7 This is a schematic diagram showing the connection between the inlet chamber, outlet chamber, and transfer chamber of the present invention.

[0026] Figure 8 This is a schematic diagram of the improved crankshaft pump assembly according to the present invention.

[0027] Figure 9 For the present invention Figure 8 Enlarged view of the structure of part B.

[0028] Figure 10 This is a schematic diagram of the improved gap-blocking assembly of the crankshaft pump assembly of the present invention.

[0029] Figure 11 This is a schematic diagram showing the cooperation between the limiting protrusion and the limiting stop of the present invention.

[0030] Figure 12 This is a schematic diagram of the structure of the plunger after further improvement of the present invention.

[0031] Figure 13 For the present invention Figure 12 Enlarged view of the C-section structure.

[0032] Figure 14 This is a schematic diagram of the structure of the present invention after adding a component for providing cooling fluid inside the casing.

[0033] Figure 15 For the present invention Figure 14 Enlarged view of the structure of part D.

[0034] In the diagram: 1. Housing; 11. Inlet chamber; 12. Outlet chamber; 13. First check valve; 2. Plunger pump assembly; 21. Pump cylinder; 211. Fin; 22. Plunger; 221. Circumferential seam; 222. First flow channel; 223. Second flow channel; 224. Variable volume chamber; 225. Second check valve; 23. Transfer chamber; 24. Seam-enlarging chamber; 3. Crankshaft drive assembly; 31. Crankshaft; 32. Connecting rod; 33. Linear slider; 4. Seam-blocking assembly; 41. Connecting seat; 411. Guide socket; 42. Slip ring; 43. Elastic connecting piece ; 431, Guide block; 44, Flexible filter screen; 45, Elastic pusher; 46, Guide post; 461, Spiral guide bar; 462, Limiting protrusion; 463, Limiting stop; 464, Guide piston block; 465, Connecting post; 47, Reset elastic element; 471, Double elastic spring; 472, Elastic membrane; 5, Sliding sealing assembly; 6, Pumping detection assembly; 61, Detection chamber; 62, Detection sensor; 7, Cooling fan; 8, Cooling fluid supply assembly; 81, Flat storage device; 82, Connecting hose; 83, Third check valve. Detailed Implementation

[0035] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0036] Refer to the instruction manual appendix Figure 1 and Figure 2A crankshaft pump assembly includes a housing 1, within which a plunger pump assembly 2 and a crankshaft drive assembly 3 are disposed. Multiple plunger pump assemblies 2 are disposed within the housing 1. Each plunger pump assembly 2 includes a pump cylinder 21 and a plunger 22. The pump cylinder 21 is fixedly installed inside the housing 1, and the plunger 22 is slidably installed inside the pump cylinder 21. The crankshaft drive assembly 3 drives the plunger 22 to reciprocate up and down within the pump cylinder 21. The inner wall of the pump cylinder 21 slides against the outer wall of the plunger 22. A sliding sealing assembly 5, adapted to the pump cylinder 21, is disposed within the inner wall of the pump cylinder 21 to seal the mating surfaces between the plunger 22 and the pump cylinder 21. A transfer chamber 23 is disposed at the bottom of the pump cylinder 21, and an inlet chamber 11 and an outlet chamber 12 are disposed at the bottom of the housing 1. (Refer to the attached instruction manual.) Figure 7 A first check valve 13 is installed between the transfer chamber 23 and the inlet chamber 11, and between the transfer chamber 23 and the outlet chamber 12. The permissible passage direction of the first check valve 13 is from the inlet chamber 11 to the outlet chamber 12.

[0037] Among them, refer to the appendix of the instruction manual Figure 2 and Figure 3 The crankshaft drive assembly 3 includes a crankshaft 31, a connecting rod 32, and a linear slider 33. The crankshaft 31 is rotatably mounted inside the housing 1 and has a drive shaft portion that interfaces with an external motor. The connecting rod 32 is rotatably connected to the connecting rod journal on the crankshaft 31. The linear slider 33 is slidably mounted inside the housing 1 and slides in the same direction as the plunger 22. The end of the connecting rod 32 away from the crankshaft 31 is rotatably connected to the linear slider 33, and the plunger 22 is fixedly connected to the linear slider 33.

[0038] It should be noted that the crankshaft drive assembly 3 described above is a conventional crank-rocker mechanism, which is also a common structure in crankshaft pumps. The specific sealing of the sliding seal assembly 5 and the working principle of the first one-way valve 13 are also conventional solutions in crankshaft pumps and plunger pumps. Therefore, the specific structures of the crankshaft drive assembly 3, the first one-way valve 13, and the sliding seal assembly 5 will not be explained in detail in this embodiment, nor will the specific working principle of the crankshaft pump be elaborated upon. Furthermore, by means of the reciprocating drive of the plunger 22 by the crankshaft drive assembly 3, when the plunger 2... When the piston moves upward, the liquid in the inlet chamber 11 is drawn into the transfer chamber 23 through the first one-way valve 13 at the inlet chamber 11. When the piston 22 moves downward, the liquid in the transfer chamber 23 is squeezed into the outlet chamber 12 through the first one-way valve 13 at the outlet chamber 12. By setting the specific structure of the crankshaft 31, the pistons 22 in each set of piston pump assemblies 2 can be driven to form different states of movement, thereby realizing the pumping effect of continuous water intake in the inlet chamber 11 and continuous water output in the outlet chamber 12. This is also the basic principle of the crankshaft pump, which will not be explained in detail in this embodiment.

[0039] In this embodiment, refer to the appendix to the specification. Figure 2 and Figure 3 A gap-filling cavity 24 is provided between the transfer chamber 23 and the pump cylinder 21. The gap-filling cavity 24 has a cylindrical internal cavity structure, and the inner diameter of the gap-filling cavity 24 is larger than the outer diameter of the plunger 22, thereby reserving a buffer space to prevent some particulate matter from getting stuck between the plunger 22 and the pump cylinder 21 and increasing damage. The bottom end of the plunger 22 extends into the gap-filling cavity 24, that is, a part of the bottom end of the plunger 22 is reserved so that it does not enter the pump cylinder 21 and does not come into contact with the sliding sealing assembly 5 when it moves upward. At the same time, a gap-blocking assembly 4 is provided at the bottom of the plunger 22 (the gap-blocking assembly 4 also does not need to enter the pump cylinder 21 and will not come into contact with the sliding sealing assembly 5). Refer to the attached instruction manual. Figure 4 and Figure 5 The gap-blocking assembly 4 includes a connecting seat 41 and a slip ring 42. The connecting seat 41 is installed at the bottom end of the plunger 22, and the slip ring 42 slides in contact with the inner wall of the gap-blocking cavity 24. The slip ring 42 and the connecting seat 41 are connected by a plurality of elastic connecting pieces 43.

[0040] For details, please refer to the instruction manual appendix. Figure 5 and Figure 6 The elastic connecting piece 43 is a flat elastic element with the ability to bend and deform upwards and downwards. Multiple elastic connecting pieces 43 are evenly arranged around the connecting seat 41 along the circumferential direction. Therefore, under the support of the elastic connecting pieces 43, the slip ring 42 also has the ability to move up and down relative to the connecting seat 41. In addition, a flexible filter screen 44 is provided in the gap between the slip ring 42 and the connecting seat 41. The flexible filter screen 44 is used to filter solid particles in the liquid pumped in the transfer chamber 23 and the slotted chamber 24. (The flexible filter screen 44 can be a filter structure with a relatively high mesh size, and it has a certain degree of flexibility to adapt to the slip ring 42 and the connecting seat 41.) The relative motion between 1, such as the filter structure made of nylon fine mesh, polyethylene filter cloth and other high-performance materials), the flexible filter screen 44 is preferentially fixed and attached to the elastic connecting piece 43 (fixed by adhesive or snap-fit ​​structure, etc.), and completely covers the gap between the slip ring 42 and the connecting seat 41. At the same time, the slip ring 42 has a certain inertia, that is, it can be made of metal structure, or it can be made of rubber or plastic structure as the main body and have a built-in metal structure to increase the counterweight. When the pump cylinder 21 moves with the plunger 22 and the speed decreases suddenly, the slip ring 42 can generate motion relative to the connecting seat 41 due to inertial factors.

[0041] In the above scheme, the elastic connecting piece 43 can be directly fixedly connected to the connecting seat 41 and the slip ring 42. The connecting seat 41 is preferably fixedly installed at the bottom of the plunger 22 in a detachable manner, so that the connecting seat 41 can move up and down with the plunger 22. In actual use, the slip ring 42 fits against the inner wall of the gap-filling cavity 24, and the flexible filter screen 44 seals the gap between the plunger 22 and the gap-filling cavity 24 throughout the process. During the downward movement of the plunger 22, it can prevent solid particles from moving to the outer wall area of ​​the plunger 22, avoiding some harder solid particles from colliding with the outer surface of the plunger 22 (i.e., the sealing surface between the plunger 22 and the sliding sealing assembly 5) and causing damage. It can also prevent solid particles from adhering to the surface of the plunger 22 and entering between the sliding sealing assembly 5 and the plunger 22 when the plunger 22 moves upward, thus affecting the sealing of the sliding sealing assembly 5. This can further improve the service life of the plunger 22 and the sliding sealing assembly 5 and improve the long-term sealing effectiveness of the crankshaft pump.

[0042] Furthermore, due to the contact between the slip ring 42 and the slotted cavity 24, there will be a certain amount of resistance. Therefore, during the normal continuous movement of the plunger 22, the slip ring 42 will exhibit a certain degree of lag due to this resistance. Since the plunger 22 needs to reciprocate up and down, its stroke will have two extreme points, upper and lower. For example, refer to the appendix of the instruction manual. Figure 6 When the plunger 22 moves downward, the slip ring 42 tends to lag behind the upper position. When the plunger 22 moves to the lower limit point, it immediately turns to move upward. At this time, due to inertia and the elastic support of the elastic connecting piece 43, the slip ring 42 will continue to move downward. Therefore, the slip ring 42 will suddenly vibrate downward, which helps to shake the solid particles blocked by the flexible filter screen 44 downward so that the solid particles can return to the transfer chamber 23 and be output along with the pumped liquid.

[0043] It should be noted that for liquids with a large number of solid particles, a certain filtration structure is set up before pumping. However, in actual use, due to malfunctions and structural aging, some smaller solid particles may move. When these particles enter the inlet chamber 11, the transfer chamber 23, and the outlet chamber 12, they will not affect the pump. However, the plunger 22 is in continuous reciprocating motion and has a certain kinetic energy. Therefore, it is necessary to prevent solid particles from impacting the outer surface of the plunger 22. The solution provided in this embodiment only protects the area between the plunger 22 and the slotted chamber 24. Although the flexible filter screen 44 will block the liquid to a certain extent, it will not affect the overall pumping effect of the plunger 22 on the liquid below because its area is small. (If a corresponding filtration structure is set up directly above the transfer chamber 23, the solid particles to be filtered are small and have a large mesh size, which will have a relatively large obstruction to the liquid and affect the pumping effect.) During the maintenance period of the crankshaft pump, the slotted assembly 4 can also be replaced, thereby effectively improving the performance of the crankshaft pump.

[0044] Furthermore, in the above solutions, crankshaft pumps are widely used. For some crankshaft pumps used for extended periods, they primarily handle liquids at room temperature or low temperature. Therefore, the design and related components of crankshaft pumps are generally adapted to room temperature conditions. However, in some special operating environments, crankshaft pumps occasionally encounter situations where they need to pump high-temperature liquids. For example, in industrial high-pressure cleaning, ship cleaning, and pipeline cleaning scenarios, room temperature water is usually sufficient for cleaning. However, for situations involving heavy oil stains or specific chemical contaminants, it is necessary to switch to high-temperature water for cleaning. After cleaning, further... When switching back to cold water flushing, and when the crankshaft pump is switching to pump high-temperature liquids and needs to be used continuously for a long time, the main body of the plunger 22 will continuously extend into the pumped liquid, causing the plunger 22 to heat up and expand. Since conventional plungers 22 are mostly solid structures, their expansion primarily deforms in the outer diameter, resulting in a tighter fit between the plunger and the sliding seal assembly 5. In severe cases, this can even affect the quality of the sliding seal assembly 5 itself and its softening effect. Therefore, to adapt to the above-mentioned operating environment, this embodiment makes the following improvements to the crankshaft pump assembly. For details, please refer to the appendix of the instruction manual. Figure 7 and Figure 8A heat dissipation cavity is provided in the area corresponding to the plunger 22 inside the housing 1. The heat dissipation cavity and the parts of the housing 1 corresponding to the liquid inlet chamber 11, liquid outlet chamber 12 and transfer chamber 23 are provided with heat insulation structure to reduce the upward transfer of heat from the pumped liquid, thereby reducing the impact of heat on the operation of the crankshaft drive assembly 3. In addition, multiple sets of horizontally arranged fins 211 are provided on the outer wall of the pump cylinder 21. The fins 211 are metal sheet structures. A heat dissipation window is provided in the housing 1 at the position corresponding to the heat dissipation cavity. A cooling fan 7 is fixedly installed in one of the heat dissipation windows. In actual use, the cooling fan 7 forms an airflow in the heat dissipation cavity, which concentrates the heat dissipation of the pump cylinder 21, thereby forming a certain heat dissipation effect on the sliding sealing assembly 5 and the plunger pump assembly 2.

[0045] In addition, to promptly determine changes in the temperature of the pumped liquid, refer to the instruction manual appendix. Figure 7 The crankshaft pump assembly also includes a pumping detection component 6, which includes a detection chamber 61. The detection chamber 61 is fixedly installed at the connection port of the liquid inlet chamber 11. In actual use, the detection chamber 61 is directly connected to the suction pipe and connected to the liquid to be pumped. The detection chamber 61 is equipped with a detection sensor 62, which may include a temperature sensor, a pressure sensor, etc. (other types of sensors can also be added as needed). This allows for timely detection and judgment of the sucked liquid, so as to adjust the working parameters of the crankshaft pump assembly in a timely manner.

[0046] Furthermore, in the aforementioned scenario, the slip ring 42 will also experience some thermal expansion. However, since the slip ring 42 is a ring-shaped structure, its deformation will tend to change the inner diameter. Therefore, please refer to the appendix of the instruction manual. Figure 8 and Figure 9 In this embodiment, the connecting seat 41 is provided with guide holes 411 in the area corresponding to each elastic connecting piece 43. One end of the elastic connecting piece 43 extends into the guide hole 411 and is fixedly connected to a guide block 431. The guide block 431 is slidably installed in the guide hole 411. An elastic pusher 45 is provided between the guide block 431 and the connecting seat 41. The elastic pusher 45 is used to provide an elastic force for the guide block 431 to move outward. The area of ​​the slip ring 42 corresponding to the inner wall of the joint cavity 24 is set as an arc-shaped outer wall, that is, the cross section of the slip ring 42 corresponding to one side of the joint cavity 24 is a semi-circular structure.

[0047] By adopting the above scheme, the elastic connecting piece 43 not only has the elastic force for bending and deforming up and down, but also has an elastic force for extending outward. Specifically, when the inner diameter of the slip ring 42 changes, the elastic connecting piece 43 itself can automatically change to retract or extend into the connecting seat 41. In addition, when the slip ring 42 moves downward relative to the connecting seat 41 due to inertia, that is, when the elastic connecting piece 43 bends and deforms from flat downward, under the elastic force of the elastic pusher 45, the elastic connecting piece 43 will be pushed outward, and the effect of the slip ring 42 moving downward will be increased, further improving the vibration effect on the flexible filter screen 44.

[0048] In addition to being fixedly installed at the bottom of the plunger 22, the connecting seat 41 can also be used in other effective connection methods, for example, as described in the appendix to the specification. Figure 8 and Figure 10 A guide post 46 is fixedly connected to the top of the connecting seat 41. The guide post 46 is movably inserted into the bottom end of the plunger 22. A spiral guide bar 461 is fixedly connected to the outside of the guide post 46. The plunger 22 is provided with a spiral groove that matches the spiral guide bar 461. When the plunger 22 reaches the bottom limit, the connecting seat 41 will continue to move downward under the action of inertia. Under the action of the spiral guide bar 461, the connecting seat 41 and the slip ring 42 will rotate synchronously, which is more conducive to the detachment of solid particles blocked by the flexible filter screen 44.

[0049] It should be noted that the above transformation of the gap-blocking component 4 is explained using the downward movement of the plunger 22 as an example. The basic principle is the same. During the upward movement of the plunger 22 until it reaches the upper limit point, the corresponding changes of the gap-blocking component 4 are opposite. Therefore, this embodiment will not be explained in detail.

[0050] Further, please refer to the appendix to the instruction manual. Figure 10 and Figure 11 The outer wall of the guide post 46 is also fixedly connected to a limiting protrusion 462. A limiting stop 463 is fixedly installed on the plunger 22 at the position corresponding to the limiting protrusion 462. The limiting stop 463 contacts the limiting protrusion 462 to form a limiting block, thereby limiting the rotation range of the connecting seat 41. At the same time, during the downward rotation of the connecting seat 41 due to inertia, it can also form an instantaneous stop and vibration in the direction of rotation, so as to accelerate the detachment of solid particles blocked on the flexible filter screen 44. In addition, a guide piston block 464 is also fixedly connected to the guide post 46. The guide piston block 464 is slidably installed in the plunger 22, thereby strengthening the vertical guidance of the connecting seat 41. The guide piston block 464 can also form a vertical positioning with the limiting stop 463, improving the positioning effect.

[0051] It should be noted that, in this embodiment, in order to facilitate the installation of the guide post 46, the limiting protrusion 462 can adopt a screw-like structure that is threaded into the bottom side of the plunger 22. If necessary, other types of structures can also be set to achieve the above purpose. At the same time, in this embodiment, the sealing between the guide post 46 and the plunger 22 can be considered or not. When sealing is required, a sealing structure can be set between the guide piston block 464 and the plunger 22. At the same time, the space area of ​​the plunger 22 corresponding to the top of the guide piston block 464 needs to be provided with a corresponding air passage to connect to the outside world to adapt to the spatial changes at the top of the guide piston block 464. When sealing is not considered, a sealing structure can be omitted, and a certain gap can be reserved so that the pumped liquid can enter and exit the gap to adapt to the spatial changes.

[0052] Furthermore, a reset elastic element 47 can be provided between the guide post 46 and the plunger 22. The reset elastic element 47 provides a reset force to the guide post 46. That is, after the connecting seat 41 rotates and moves due to inertia, the elastic force of the reset elastic element 47 can reset the connecting seat 41 to its initial position when the plunger 22 moves smoothly. This provides the necessary reset force for the connecting seat 41. For example, refer to the appendix of the instruction manual. Figure 10 The reset elastic element 47 is a double elastic spring 471. The double elastic spring 471 is located at the top of the guide post 46. The two ends of the double elastic spring 471 are fixedly connected to the plunger 22 and the guide post 46 respectively. The double elastic spring 471 has elastic force and torsion in the up and down directions, so as to drive the guide post 46 to reset with the connecting seat 41.

[0053] Furthermore, in the above solution, the heat dissipation of the plunger 22 mainly relies on the heat dissipation of the pump cylinder 21 area. To further reduce the impact of thermal expansion of the plunger 22, this embodiment also makes further improvements to the plunger 22. For details, please refer to the appendix of the specification. Figure 12 The plunger 22 has an annular slit 221 inside. The annular slit 221 is located close to the outer wall of the plunger 22 and is a cavity surrounding the plunger 22. With the presence of the annular slit 221, when the plunger 22 is heated and deformed, the deformation is no longer concentrated on the outer diameter of the plunger 22. At the same time, the area of ​​the plunger 22 corresponding to the annular slit 221 will also shrink inward due to deformation. Therefore, the amount of thermal deformation of the outer wall of the plunger 22 can be reduced, and the impact on the sliding sealing assembly 5 can be reduced.

[0054] Additionally, the reset elastic element 47 can also be an elastic membrane 472, which has elasticity in the vertical direction. (Refer to the attached instruction manual.) Figure 13A variable displacement cavity 224 is provided inside the plunger 22 in the area corresponding to the top of the guide post 46. An elastic membrane 472 is fixedly installed in the variable displacement cavity 224, and the elastic membrane 472 forms a seal for the lower part of the variable displacement cavity 224. A connecting post 465 is rotatably installed on the top of the guide post 46. The middle part of the elastic membrane 472 is fixedly connected to the connecting post 465. A first flow channel 222 is provided in the plunger 22, which communicates with the variable displacement cavity 224 and the annular slot 221. The top of the plunger 22 is provided with a channel that allows the annular slot 221 to communicate with the outside. The second flow channel 223, which is connected to the boundary (i.e., the heat dissipation cavity), generates relative movement between the guide post 46 and the connecting seat 41 and the plunger 22. Under the elastic reset of the double elastic spring 471, the double elastic spring 471 undergoes up-and-down bulging deformation (other elastic structures can be added to assist reset if necessary). This causes the effective space of the variable volume cavity 224 to change in size, allowing air to enter and exit the annular gap 221, forming a breathing effect, thereby creating a certain heat dissipation effect on the inside of the plunger 22.

[0055] To enhance the heat dissipation of the plunger 22 itself, a cooling fluid supply component 8 can be integrated into the housing 1. This component 8 circulates low-temperature fluid into the annular gap 221, thereby improving the heat dissipation of the plunger 22. For example, refer to the appendix to the instruction manual. Figure 14 and Figure 15 The first flow channel 222 is provided with two sets, and a second check valve 225 is installed on each set of the first flow channels 222. The allowed flow direction of one set of second check valves 225 is the direction of flow from the first flow channel 222 corresponding to the second check valve 225 into the variable volume cavity 224. The allowed flow direction of the other set of second check valves 225 is the direction of flow from the variable volume cavity 224 into the first flow channel 222 corresponding to the second check valve 225. Thus, the variable volume cavity 224 forms a diaphragm pump structure, and the circulation of cooling fluid is achieved during the up and down deformation of the elastic membrane 472.

[0056] In the above scheme, the cooling fluid supply component 8 includes multiple sets of flat reservoirs 81, which are vertically distributed in the heat dissipation cavity inside the casing 1 near the cooling fan 7. Each flat reservoir 81 has a flat cavity structure and stores water. The flat reservoirs 81 are arranged in parallel and interconnected. Two sets of second flow channels 223 are also provided, each connected to a flat reservoir 81 via a connecting hose 82 (the two connecting hoses 82 can be connected separately). Two connecting hoses 82 located at the top and bottom are equipped with third check valves 83 on both sets of second flow channels 223. One set of third check valves 83 allows passage from the outside to the inside of the set of second flow channels 223, while the other set allows passage from the inside of the set of second flow channels 223 to the outside. This, in conjunction with the flat memory 81 and the elastic membrane 472, forms a circulating water supply to the inside of the plunger 22, and cools the flat memory 81 and the water inside it outside the plunger 22 with the help of the cooling fan 7.

[0057] It should be noted that the above heat dissipation scheme for the plunger 22 is based on the consideration of integrated equipment. The corresponding equipment is integrated into the housing 1 to form a crankshaft pump assembly that is easy to move and operate. If necessary, a separate cooling water source and power pump can also be set up to concentrate and quickly cool the mechanical energy of the plunger 22.

[0058] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A crankshaft pump assembly, comprising a housing (1), wherein a plunger pump assembly (2) and a crankshaft drive assembly (3) are disposed within the housing (1), the plunger pump assembly (2) comprising a pump cylinder (21) and a plunger (22), the pump cylinder (21) being fixedly installed inside the housing (1), the plunger (22) being slidably installed inside the pump cylinder (21), a sliding sealing assembly (5) adapted to the pump cylinder (21) being disposed in the inner wall of the pump cylinder (21), and a transfer chamber (23) being disposed at the bottom of the pump cylinder (21), characterized in that, A slot-filling cavity (24) is provided between the transfer chamber (23) and the pump cylinder (21). A slot-blocking assembly (4) is provided at the bottom of the plunger (22). The slot-blocking assembly (4) includes a connecting seat (41) and a slip ring (42). The connecting seat (41) is installed at the bottom end of the plunger (22). The slip ring (42) slides against the inner wall of the slot-filling cavity (24). The slip ring (42) and the connecting seat (41) are connected by multiple elastic connecting pieces (43). The elastic connecting pieces have the ability to bend upward and downward. A flexible filter screen (44) is provided in the gap between the slip ring (42) and the connecting seat (41). The top of the connecting seat (41) is fixedly connected to a guide post (46), which is movably inserted into the bottom end of the plunger (22). A spiral guide bar (461) is fixedly connected to the outside of the guide post (46). The plunger (22) is provided with a spiral groove that is compatible with the spiral guide bar (461). A limiting protrusion (462) is also fixedly connected to the outer wall of the guide post (46). A limiting stop (463) is fixedly installed on the plunger (22) at the position corresponding to the limiting protrusion (462). A reset elastic element (47) is also provided between the guide post (46) and the plunger (22). The reset elastic element (47) is used to provide a reset elastic force to the guide post (46). The plunger (22) has an annular slit (221) inside, which is located near the outer wall of the plunger (22). A variable displacement cavity (224) is provided inside the plunger (22) in the region corresponding to the top of the guide post (46). The reset elastic element (47) includes an elastic membrane (472), which has elasticity in the vertical direction. The elastic membrane (472) is fixedly installed inside the variable displacement cavity (224), and the elastic membrane (472)... 2) A seal is formed in the lower region of the variable volume cavity (224). A connecting column (465) is rotatably installed on the top of the guide column (46). The middle region of the elastic membrane (472) is fixedly connected to the connecting column (465). A first flow channel (222) is provided in the plunger (22) to communicate with the variable volume cavity (224) and the annular seam (221). A second flow channel (223) is provided on the top of the plunger (22) to communicate with the outside world through the annular seam (221).

2. A crankshaft pump assembly according to claim 1, wherein The crankshaft drive assembly (3) is used to drive the plunger (22) to reciprocate within the pump cylinder (21). The crankshaft drive assembly (3) includes a crankshaft (31), a connecting rod (32), and a linear slider (33). The crankshaft (31) is rotatably mounted within the housing (1). The crankshaft (31) is provided with a drive shaft portion that connects to an external motor. The connecting rod (32) is rotatably connected to the connecting rod journal on the crankshaft (31). The linear slider (33) is slidably mounted within the housing (1). The end of the connecting rod (32) away from the crankshaft (31) is rotatably connected to the linear slider (33). The plunger (22) is fixedly connected to the linear slider (33). The bottom of the housing (1) is provided with an inlet chamber (11) and an outlet chamber (12). A first check valve (13) is installed between the intermediate transfer chamber (23) and the inlet chamber (11) and between the intermediate transfer chamber (23) and the outlet chamber (12).

3. A crankshaft pump assembly according to claim 2, wherein, The connecting seat (41) is provided with guide holes (411) in the area corresponding to each elastic connecting piece (43). One end of the elastic connecting piece (43) extends into the guide hole (411) and is fixedly connected to a guide block (431). The guide block (431) is slidably installed in the guide hole (411). An elastic pusher (45) is provided between the guide block (431) and the connecting seat (41). The elastic pusher (45) is used to provide an elastic force for the guide block (431) to move outward. The slip ring (42) is set as an arc-shaped outer wall in the area corresponding to the inner wall of the slotted cavity (24).

4. A crankshaft pump assembly according to claim 3, wherein, A heat dissipation cavity is provided in the area corresponding to the plunger (22) inside the housing (1). The heat dissipation cavity and the parts of the housing (1) corresponding to the liquid inlet cavity (11), liquid outlet cavity (12) and transfer cavity (23) are provided with heat insulation structure. Multiple sets of horizontally arranged fins (211) are provided on the outer wall of the pump cylinder (21). The fins (211) are metal sheet structures. A heat dissipation window is provided at the position of the heat dissipation cavity in the housing (1). A heat dissipation fan (7) is fixedly installed in one of the heat dissipation windows.

5. A crankshaft pump assembly according to claim 4, wherein, The crankshaft pump assembly also includes a pumping detection component (6), which includes a detection chamber (61). The detection chamber (61) is fixedly installed at the connection port of the liquid inlet chamber (11). A detection sensor (62) is installed in the detection chamber (61). The detection sensor (62) includes a temperature sensor and a pressure sensor.

6. A crankshaft pump assembly according to claim 5, wherein, The first flow channel (222) is provided with two sets, and a second check valve (225) is installed on both sets of the first flow channels (222). The allowed flow direction of one set of the second check valves (225) is the direction of flow from the first flow channel (222) corresponding to the second check valve (225) to the inside of the variable volume cavity (224). The allowed flow direction of the other set of the second check valves (225) is the direction of flow from the variable volume cavity (224) to the inside of the first flow channel (222) corresponding to the second check valve (225).

7. A crankshaft pump assembly according to claim 6, wherein The housing (1) is provided with a cooling fluid supply assembly (8), which includes multiple sets of flat storage devices (81). The second flow channel (223) is provided with two sets. The two sets of second flow channels (223) are connected to the flat storage devices (81) through a set of connecting hoses (82). A third check valve (83) is installed on both sets of second flow channels (223). The allowable passage direction of one set of third check valves (83) is from the outside to the inside of the second flow channel (223), and the allowable passage direction of the other set of third check valves (83) is from the inside to the outside of the second flow channel (223).

8. A crankshaft pump assembly according to claim 7, wherein, Multiple sets of the flat storage devices (81) are vertically distributed in the heat dissipation cavity inside the casing (1) near the heat dissipation fan (7). The flat storage devices (81) have a flat cavity structure and store water inside. The flat storage devices (81) are arranged in parallel and are interconnected with each other.

Images