Slurry conveying system
By setting grooves on the first piston of the cylinder of the slurry conveying system and setting appropriate convex bodies at the end of the rod cavity, the instability problem of filling pumps during the slurry conveying process is solved, and more stable slurry conveying and extending the service life of the wearable parts is achieved.
Patent Information
- Application Number
- CN202421519702.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing filling pumps have instability during the slurry conveying process, resulting in pipeline impact and noise, and the service life of consumable parts due to the water hammer effect is reduced.
A slurry conveying system is designed, by providing grooves on the first piston of the oil cylinder and providing adapted convex bodies at the end of the rod cavity to form a buffering effect to avoid impact generation.
It improves the stability of slurry conveying in the pipeline, reduces impact and noise, and extends the service life of consumable parts.
Smart Images
Figure CN222823358U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of material conveying equipment, and in particular to a slurry conveying system. Background Art
[0002] As the country has greatly strengthened its efforts in environmental protection, the requirements for existing mining are becoming increasingly stringent. In order to avoid risks such as excessive environmental pollution in mining areas and collapse in goaf areas, most companies currently use solid waste such as mine tailings, crushed stone, fly ash, industrial slag, etc. to make a paste-like slurry that does not require dehydration, and then transport it to underground goaf areas through filling pumps and other equipment. This can not only increase resource extraction rates, but also reduce land occupation and reduce environmental pollution.
[0003] When the filling pump is working, if the slurry delivery is unstable, for example, the reversal of the oil cylinder will cause the slurry to be cut off in the pipeline, resulting in a large impact force and noise in the pipeline; in addition, when the slurry is pumped upward, the water hammer effect of the slurry will also cause the service life of the wearing parts of the filling pump to be reduced. Utility Model Content
[0004] In order to improve the stability of slurry during transportation in a pipeline, the present application provides a slurry transportation system.
[0005] An embodiment of the present application provides a slurry conveying system, comprising: a pumping device, the pumping device comprising an oil cylinder and a conveying cylinder; wherein a piston rod and a first piston are provided in the oil cylinder, and a rod chamber and a rodless chamber are formed in the oil cylinder, and the first end of the piston rod is connected to the first piston arranged in the oil cylinder; a second piston is provided in the conveying cylinder, and the second piston is connected to the second end of the piston rod; the first piston is provided with a groove on a side close to the piston rod, and a convex body that can be matched with the groove is provided on the side opposite to the groove at the end of the rod chamber; a feeding valve, the feeding valve comprising a first port for feeding, a second port for discharging, and a third port, and the conveying cylinder is connected to the third port at an end away from the piston rod.
[0006] In a specific embodiment, the rod chamber is provided with a damping valve group, and the damping valve group includes a first oil port and a second oil port, a first flow channel and a second flow channel are provided between the first oil port and the second oil port, the first oil port is used to supply oil to the second oil port or receive return oil from the second oil port, the second oil port is connected with the rod chamber, the first flow channel is provided with a throttle valve, and the second flow channel is provided with a one-way valve.
[0007] In a specific embodiment, the first flow channel includes a first sub-flow channel and a second sub-flow channel, the first sub-flow channel is provided with a first throttle valve, and the second flow channel is provided with a second throttle valve, wherein the second throttle valve is an adjustable flow valve.
[0008] In a specific embodiment, a lubrication hole communicating with the inner cavity is formed on the cylinder wall of the delivery cylinder near one end of the piston rod, so as to provide lubrication medium to the contact surface between the inner wall of the delivery cylinder and the second piston.
[0009] In a specific embodiment, an arc-shaped transition structure is formed between the first port and the third port of the feeding valve, and / or an arc-shaped transition structure is formed between the second port and the third port of the feeding valve.
[0010] In a specific embodiment, the oil cylinder is provided with a displacement sensor for monitoring the piston rod.
[0011] In a specific embodiment, it also includes a power device, a connecting pipe is provided between the power device and the oil cylinder, and the power device includes an oil pump, a motor, an oil tank, and a reversing valve group; the oil pump is transmission-connected to the motor, and under the drive of the motor, the oil in the oil tank passes through the reversing valve group to provide hydraulic power to the oil cylinder.
[0012] In a specific embodiment, the slurry conveying system is also provided with an accumulator, and the accumulator is configured with an accumulator valve group, and the accumulator valve group is provided with a first conduction position and a second conduction position; wherein, in the first conduction position, the accumulator is connected with the rod chamber to receive part of the oil released to the rod chamber, and in the second conduction position, the accumulator is connected with the rodless chamber to release the oil to the rodless chamber.
[0013] The slurry conveying system provided by the embodiment of the present application includes a pumping device and a feeding valve; wherein, a piston rod and a first piston are provided in the oil cylinder of the pumping device, and a rod cavity and a rodless cavity are formed in the oil cylinder, and the first end of the piston rod is connected to the first piston provided in the oil cylinder; a second piston is provided in the delivery cylinder of the pumping device, and the second piston is connected to the second end of the piston rod; the first piston is provided with a groove on the side close to the piston rod, and the end of the rod cavity is provided with a convex body that can be matched with the groove on the side opposite to the groove; in addition, the feeding valve includes a first port for feeding, a second port for discharging, and a third port, and the delivery cylinder is connected to the third port at one end away from the piston rod. The slurry conveying system is provided with a groove on the first piston and a matching convex body on the rod cavity of the oil cylinder, so that at the end of the rapid feeding stroke, when the groove and the convex body are embedded and discharge the oil in the groove, a buffering effect is formed on the first piston and the end of the rod cavity, thereby avoiding impact and improving the stability of the slurry when being transported in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 A diagram of a slurry conveying system provided in an embodiment of the present application;
[0016] Figure 2 A schematic cross-sectional structure diagram of an oil cylinder provided in an embodiment of the present application;
[0017] Figure 3 A schematic diagram of the cross-sectional structure of a damping valve assembly provided in an embodiment of the present application;
[0018] Figure 4 A schematic diagram of a pumping device and a feeding valve of a slurry delivery system provided in an embodiment of the present application;
[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the feeding valve provided in an embodiment of the present application.
[0020] Description of main reference numerals:
[0021] 1-power unit; 11-oil pump; 12-motor; 13-reversing valve group; 14-accumulator; 2-pumping device; 21-oil cylinder; 211-piston rod; 212-first piston; 2121-groove; 213-convex body; 214-displacement sensor; 22-delivery cylinder; 221-lubrication hole; 3-feeding valve; 31-first port; 32-second port; 33-third port; 4-connecting pipe; 5-damping valve group; 51-first oil port; 52-second oil port; 53-first flow channel; 531-first sub-flow channel; 532-second sub-flow channel; 54-second flow channel; 55-first throttle valve; 56-check valve; 57-second throttle valve. DETAILED DESCRIPTION
[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0023] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. If the delivery of the slurry is unstable, such as when the filling pump is working, the reversal of the oil cylinder and the water hammer effect when pumping the slurry, it will have a greater impact on the pipeline, affecting the normal delivery of the slurry and reducing the service life of the equipment.
[0024] In order to improve the stability of slurry during transportation in pipelines, Figure 1 As shown, an embodiment of the present application provides a slurry conveying system, which may include:
[0025] The pumping device 2 includes an oil cylinder 21 and a delivery cylinder 22; a piston rod 211 and a first piston 212 are provided in the oil cylinder 21, and a rod cavity and a rodless cavity are formed in the oil cylinder 21, and the first end of the piston rod 211 is connected to the first piston 212 arranged in the oil cylinder 21; a second piston is provided in the delivery cylinder 22, and the second piston is connected to the second end of the piston rod 211; the first piston 212 is provided with a groove 2121 on the side close to the piston rod 211, and the end of the rod cavity is provided with a convex body 213 that can be matched with the groove 2121 on the side opposite to the groove 2121. Under the action of the high-pressure oil entering the rod chamber and the rodless chamber of the oil cylinder 21, a driving force is generated on the first piston 212, so that the first piston 212 drives the piston rod 211 to reciprocate, and the piston rod 211 drives the second piston in the delivery cylinder 22 to reciprocate, thereby generating the action effect of pumping and conveying materials in the delivery cylinder 22. Specifically, the delivery cylinder 22 and the oil cylinder 21 of the pumping device 2 can be coaxially arranged on the frame to form a single-bar motion structure to improve the compactness of the whole machine structure; further, as Figure 2 As shown, the first piston 212 is provided with a groove 2121 on the side close to the piston rod 211, and the groove 2121 can be specifically designed as an annular structure opened on the end face of the first piston 212, and the rod cavity is provided with a convex body 213 adapted to the groove 2121 on the side relative to the groove 2121, and the convex body 213 can be specifically designed as an annular convex structure complementary to the shape of the groove 2121, so that when the first piston 212 quickly approaches the end of the rod cavity, a local storage space for oil is formed between the groove 2121 and the convex body 213, and in the process of continuous approach and engagement between the groove 2121 and the convex body 213, the oil in the local storage space is gradually discharged, thereby forming a buffering effect on the first piston 212 and the end of the rod cavity to avoid impact.
[0026] The feeding valve 3 includes a first port 31 for feeding, a second port 32 for discharging, and a third port 33. The delivery cylinder 22 is connected to the third port 33 at one end away from the piston rod 211. The first port 31 is connected to the feeding pipe, and when the second port 32 is closed, the slurry can be fed into the delivery cylinder 22 from the first port 31 through the third port 33 through the suction stroke of the second piston; the second port 32 is connected to the discharging pipe, and when the first port 31 is closed, the slurry can be discharged from the delivery cylinder 22 from the third port 33 through the second port 32 through the punching stroke of the second piston.
[0027] The slurry conveying system provided in the embodiment of the present application includes a pumping device 2 and a feeding valve 3; the pumping device 2 includes a cylinder 21 and a feeding cylinder 22; wherein the cylinder 21 is provided with a piston rod 211 and a first piston 212, and a rod cavity and a rodless cavity are formed, and the first end of the piston rod 211 is connected to the first piston 212 arranged in the cylinder 21; a second piston is provided in the feeding cylinder 22, and the second piston is connected to the second end of the piston rod 211; the first piston 212 is provided with a groove 2121 on the side close to the piston rod 211, and the end of the rod cavity is provided with a convex body 213 that can be matched with the groove 2121 on the side opposite to the groove 2121; and a feeding valve 3, the feeding valve 3 includes a first port 31 for feeding, a second port 32 for discharging, and a third port 33, and the feeding cylinder 22 is connected to the third port 33 at the end away from the piston rod 211. The slurry conveying system is configured with a groove 2121 on the first piston 212 and a matching convex body 213 on the rod chamber of the oil cylinder 21, so that at the end of the rapid feeding stroke, the groove 2121 and the convex body 213 are interlocked and the oil in the groove 2121 is discharged, forming a buffering effect on the first piston 212 and the end of the rod chamber, thereby avoiding impact and improving the stability of the slurry when being conveyed in the pipeline.
[0028] Optionally, in one embodiment of the present application, a damping valve group 5 is provided in the rod chamber, and the damping valve group 5 includes a first oil port 51 and a second oil port 52, and a first flow channel 53 and a second flow channel 54 are provided between the first oil port 51 and the second oil port 52. The first oil port 51 is used to supply oil to the second oil port 52 or receive return oil from the second oil port 52, and the second oil port 52 is connected to the rod chamber. The first flow channel 53 is provided with a throttle valve, and the second flow channel 54 is provided with a one-way valve 56.
[0029] Preferably, in one embodiment of the present application, the first flow channel 53 includes a first sub-flow channel 531 and a second sub-flow channel 532, the first sub-flow channel 531 is provided with a first throttle valve 55, and the second flow channel 54 is provided with a second throttle valve 57, wherein the second throttle valve 57 is an adjustable flow valve.
[0030] When the slurry conveying system is rapidly pumping materials outward, the piston rod 211 runs at a relatively fast speed in the oil cylinder 21. When the first piston 212 rapidly approaches the end of the rod chamber, the damping valve group 5 is configured for the oil passage of the rod chamber to further reduce the approach speed of the first piston 212 to prevent the cylinder from hitting. The first oil port 51 can be connected to the oil supply line or the oil return line through the valve group to supply oil to the second oil port 52 or receive the return oil from the second oil port 52. Figure 3As shown, the fluid circuit of the damping valve group 5 can be configured at the end of the stroke when the first piston 212 moves toward the end of the rod chamber. At the end of the stroke, the one-way valve 56 of the second flow channel 54 of the damping valve group 5 is closed, and the oil can only return from the second oil port 52 to the first oil port 51 through the first sub-flow channel 531 and the second sub-flow channel 532. In this way, due to the throttle valve of the first sub-flow channel 531 and the adjustable throttle valve of the second sub-flow channel 532, the oil return speed of the oil in the rod chamber from the second oil port 52 to the first oil port 51 will be slowed down, thereby reducing the approach speed of the first piston 212 to the end of the rod chamber to avoid impact. In addition, through the adjustment function of the adjustable throttle valve, the oil return speed can be adjusted according to different working conditions. It can be seen that the damping valve group 5 further improves the stability of the slurry when it is transported in the pipeline.
[0031] Optionally, in one embodiment of the present application, a lubrication hole 221 communicating with the inner cavity is opened on the cylinder wall of the delivery cylinder 22 near one end of the piston rod 211, for providing lubrication medium to the contact surface between the inner wall of the delivery cylinder 22 and the second piston.
[0032] like Figure 4 As shown, by opening a lubrication hole 221 connected to the inner cavity on the cylinder wall of the delivery cylinder 22 at one end close to the piston rod 211, a lubrication medium can be input into the inner wall of the delivery cylinder 22 through the lubrication hole 221. In this way, when the second piston moves to the position of the lubrication hole 221, a lubrication film will be formed on the contact surface between the second piston and the inner wall of the delivery cylinder 22, thereby improving the service life of the second piston.
[0033] Optionally, in one embodiment of the present application, an arc-shaped transition structure is formed between the first port 31 and the third port 33 of the feeding valve 3, and / or an arc-shaped transition structure is formed between the second port 32 and the third port 33 of the feeding valve 3.
[0034] like Figure 5 As shown, the ports of the feed valve 3 are designed as an arc-shaped transition structure, which can reduce friction, so that when the slurry flows into the delivery cylinder 22 from the first port 31 of the feed valve 3 through the third port 33 through the suction stroke of the second piston, and when the slurry flows out of the delivery cylinder 22 from the third port 33 of the feed valve 3 through the second port 32 through the punching stroke of the second piston, the pressure loss of the flow inside the valve body is reduced. In addition, in order to further ensure wear resistance and reduce pressure loss, the feed valve 3 can be made of cast carbon steel ZG230-450H material, which has good wear resistance.
[0035] Optionally, in one embodiment of the present application, the oil cylinder 21 is provided with a displacement sensor 214 for monitoring the piston rod 211 .
[0036] In this example, a displacement sensor 214 is built into the oil cylinder 21 to output signals, and the stroke is set by a program to realize the reciprocating linear motion of the piston rod 211 and the first piston 212 and the second piston, thereby improving the stability of the slurry delivery flow rate. Figure 1 , 2 As shown in , 4, by using a magnetostrictive displacement sensor 214, a long hole is axially opened at the first end of the piston rod 211 of the cylinder 21 and a measuring rod of the displacement sensor 214 is passed through, and a magnetic ring of the displacement sensor 214 is set at the end of the piston rod 211, and the electronic compartment of the displacement sensor 214 is set at the end of the rodless cavity of the cylinder 21. When in use, the current pulse emitted by the electronic compartment is transmitted in the measuring rod to form a circumferential magnetic field, which intersects with the magnetic field generated by the active magnetic ring as a position change to generate a strain mechanical wave pulse signal. By detecting the strain mechanical wave pulse signal and combining it with the measurement time, the accurate displacement distance of the piston rod 211 can be obtained.
[0037] Optionally, in one embodiment of the present application, the slurry conveying system also includes a power device 1, a connecting pipe 4 is provided between the power device and the oil cylinder, and the power device 1 includes an oil pump 11, a motor 12, an oil tank, and a reversing valve group 13; the oil pump 11 is transmission-connected to the motor 12, and driven by the motor 12, the oil in the oil tank passes through the reversing valve group 13 to provide hydraulic power to the oil cylinder 21.
[0038] The connecting pipe 4 is provided between the oil cylinder 21 and the power device 1, such as Figure 1As shown, it can be an integrated oil supply pipeline and oil return pipeline between the power device 1 and the oil cylinder 21, supplying the oil from the oil pump 11 of the power device 1 to the oil cylinder 21, and transmitting the return oil from the oil cylinder 21 to the oil tank of the power device 1. The power device 1 inputs high-pressure oil to the slurry conveying system, and builds the required fluid circuit under the on-off action of the hydraulic valve, providing hydraulic driving force for each working step of the actuator, so as to operate according to the set action sequence. The power device 1 and the pumping device 2 are arranged separately and connected by a connecting pipe 4, which is convenient for maintenance. The power device 1 includes an oil pump 11 driven by a motor 12. The motor 12 drives the oil pump 11 to rotate and convert mechanical energy into hydraulic energy of oil. Under the action of the reversing valve group 13, the oil enters the oil cylinder 21 of the pumping device 2 through the oil supply pipeline of the connecting pipe 4 after reversing. For example, the oil enters the rodless chamber of the oil cylinder 21 to push the piston rod 211 so that the delivery cylinder 22 outputs slurry, and the oil in the rod chamber of the oil cylinder 21 flows back to the oil tank through the return oil pipeline of the connecting pipe 4, or the oil enters the rod chamber of the oil cylinder to push the piston rod 211 so that the delivery cylinder 22 inhales slurry, and the oil in the rodless chamber of the oil cylinder 21 flows back to the oil tank through the return oil pipeline of the connecting pipe 4. Among them, the reversing valve group 13 constructs different fluid circuits under a preset mechanism, such as under different hydraulic control or electric control, to provide hydraulic driving force for each working step of the first piston 212, piston rod 211 and other components of the oil cylinder 21, so as to operate according to the set action sequence.
[0039] Optionally, in one embodiment of the present application, the slurry conveying system is further provided with an accumulator 14, and the accumulator 14 is configured with an accumulator valve group, and the accumulator valve group is provided with a first conduction position and a second conduction position; wherein, in the first conduction position, the accumulator is connected to the rod chamber to receive part of the oil released to the rod chamber, and in the second conduction position, the accumulator is connected to the rodless chamber to release the oil to the rodless chamber.
[0040] In this example, an accumulator 14 is installed on the slurry conveying system, and an accumulator valve group is configured to connect the corresponding fluid circuit, which can speed up the speed of the oil cylinder 21 to eject materials outward, and realize the functions of slow suction and fast ejection. The accumulator 14 is specifically configured so that when the accumulator valve group is in the first conduction position and the oil pump 11 of the power device 1 supplies oil to the rod chamber, the accumulator 14 is connected to the rod chamber and the oil pump 11 to receive the oil released by the oil pump 11 of the power device 1, and an energy storage effect is formed at this time. In this way, the moving speed of the first piston 212 and the piston rod 211 of the oil cylinder 21 can be reduced, thereby Slow material suction is achieved; when the oil pump 11 of the power device 1 supplies oil to the rodless chamber, the accumulator 14 is configured to be in the second conduction position when the accumulator valve group is in the second conduction position. When the oil pump 11 of the power device 1 supplies oil to the rodless chamber, the accumulator 14 is connected to the rodless chamber, and the stored oil is released to the rodless chamber to quickly push the first piston 212. In this way, the movement speed of the first piston 212 and the piston rod 211 of the oil cylinder 21 can be accelerated, thereby achieving rapid material feeding. The accumulator valve group can specifically adopt an electromagnetic reversing valve or an electro-hydraulic reversing valve to achieve the functional configuration of the above-mentioned first conduction position and the second conduction position.
[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0042] The above content has described the embodiments of the present application in detail. Those skilled in the art can design and modify the device and its use within the scope of the present application according to the on-site construction conditions.
[0043] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.
[0044] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A slurry conveying system, characterized in that: include: A pumping device, the pumping device comprises an oil cylinder and a delivery cylinder; wherein a piston rod and a first piston are arranged in the oil cylinder, and a rod cavity and a rodless cavity are formed in the oil cylinder, and the first end of the piston rod is connected to the first piston arranged in the oil cylinder; a second piston is arranged in the delivery cylinder, and the second piston is connected to the second end of the piston rod; the first piston is provided with a groove on a side close to the piston rod, and the end of the rod cavity is provided with a convex body that can be matched with the groove on a side opposite to the groove; The feeding valve comprises a first port for feeding, a second port for discharging, and a third port, and the delivery cylinder is connected to the third port at one end away from the piston rod.
2. The slurry delivery system according to claim 1, characterized in that: The rod chamber is provided with a damping valve group, and the damping valve group includes a first oil port and a second oil port, a first flow channel and a second flow channel are provided between the first oil port and the second oil port, the first oil port is used to supply oil to the second oil port or receive return oil from the second oil port, the second oil port is connected with the rod chamber, the first flow channel is provided with a throttle valve, and the second flow channel is provided with a one-way valve.
3. The slurry delivery system according to claim 2, characterized in that: The first flow channel includes a first sub-flow channel and a second sub-flow channel, the first sub-flow channel is provided with a first throttle valve, the second flow channel is provided with a second throttle valve, wherein the second throttle valve is an adjustable throttle valve.
4. The slurry delivery system according to claim 1, characterized in that: The delivery cylinder is provided with a lubrication hole communicating with the inner cavity on the cylinder wall near one end of the piston rod, for providing lubrication medium to the contact surface between the inner wall of the delivery cylinder and the second piston.
5. The slurry delivery system according to claim 1, characterized in that: An arc-shaped transition structure is formed between the first port and the third port of the feeding valve, and / or an arc-shaped transition structure is formed between the second port and the third port of the feeding valve.
6. The slurry delivery system according to claim 1, characterized in that: The oil cylinder is provided with a displacement sensor for monitoring the piston rod.
7. The slurry delivery system according to claim 1, characterized in that: It also includes a power device, a connecting pipe is provided between the power device and the oil cylinder, and the power device includes an oil pump, a motor, an oil tank, and a reversing valve group; the oil pump is transmission-connected to the motor, and under the drive of the motor, the oil in the oil tank passes through the reversing valve group to provide hydraulic power to the oil cylinder.
8. The slurry delivery system according to claim 1, characterized in that: An accumulator is also provided, which is equipped with an accumulator valve group, and the accumulator valve group is provided with a first conduction position and a second conduction position; wherein, in the first conduction position, the accumulator is connected with the rod chamber to receive part of the oil released to the rod chamber, and in the second conduction position, the accumulator is connected with the rodless chamber to release the oil to the rodless chamber.