Coal slurry conveying system

Abstract

The invention discloses a coal slurry conveying system which comprises a power end and a fluid end which are connected. The fluid end comprises a valve box structure assembly, a suction valve assembly, a discharge valve assembly and a guide pipe structure, the suction valve assembly and the discharge valve assembly are installed at the two ends of the valve box structure assembly respectively, a cavity is formed in the valve box structure assembly, and the guide pipe structure is arranged in the cavity; the valve box structure assembly comprises a main body part, a head part and a pressing sleeve, the head part is connected to one end of the main body part, the head part is arranged at the end, away from the guide pipe structure, of the discharge valve assembly, and the pressing sleeve is arranged in the cavity and supported between the suction valve assembly and the discharge valve assembly. Through the application of the invention, a conveying system suitable for fluids such as coal slurry and the like is provided, the conveying system can be particularly suitable for conveying fluids with high temperature, high pressure, high viscosity and high solid content, the installation is convenient and stable, and meanwhile, the deposition of a large amount of solid particles can be well prevented.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, and in particular to a coal slurry conveying system. Background Art

[0002] At present, the use of plunger pumps is more commonly considered in the fields of coal chemical and oil refining, especially in the direct coal liquefaction process, which brings certain pressure to the normal operation of the plunger pump; especially when it comes to the high temperature, high pressure, high viscosity, high solid content and other characteristics of coal slurry, the actual application often has higher requirements on the performance and stability of the existing plunger pump.

[0003] More specifically, the existing Chinese authorized patent 201520443034.8 provides a plunger reciprocating pump structure with a conduit in order to achieve the high solid content characteristics of coal slurry, so as to solve the blockage problem of the pump structure caused by the coal slurry during transportation as much as possible. However, the stability of the existing plunger pump with a conduit in the overall structural coordination needs to be further improved, and the introduction of the conduit also brings certain inconveniences to the cleaning and component replacement of the inside of the plunger pump. Summary of the invention

[0004] In view of this, in order to solve the above problems, the object of the present invention is to provide a coal slurry conveying system, comprising: a power end and a hydraulic end, wherein the power end and the hydraulic end are connected;

[0005] The hydraulic end comprises: a valve box structure assembly, a suction valve assembly, a discharge valve assembly and a conduit structure, wherein the suction valve assembly and the discharge valve assembly are respectively installed at both ends of the valve box structure assembly, the valve box structure assembly has a cavity inside, the conduit structure is arranged in the cavity, one end of the conduit structure is arranged close to the discharge valve assembly, and the other end of the conduit structure is arranged toward the suction valve assembly;

[0006] Wherein, the valve box structure assembly includes: a main body, a head and a compression sleeve, the head is connected to one end of the main body, the cavity is formed between the head and the main body, the head is arranged at one end of the discharge valve assembly away from the catheter structure, the compression sleeve is arranged in the cavity, and the compression sleeve is supported between the suction valve assembly and the discharge valve assembly.

[0007] In another preferred embodiment, one end of the compression sleeve close to the head is abutted against or connected to an outer edge of one end of the discharge valve assembly away from the head or one end of the conduit structure.

[0008] In another preferred embodiment, a cooling channel is formed in the compression sleeve, and an interface end is formed on the outer side of the compression sleeve of the cooling channel, and the interface end is connected to a cooling water supply device through a pipe body.

[0009] In another preferred embodiment, one end of the catheter structure extends radially outward to form an annular contact portion, and the annular contact portion is disposed against the compression sleeve.

[0010] In another preferred embodiment, it further comprises: a guiding device, wherein the head is detachably arranged on the main body, and the guiding device is used to guide the head to be arranged away from or close to the main body.

[0011] In another preferred embodiment, the head, the discharge valve assembly and the conduit structure are connected in sequence.

[0012] In another preferred embodiment, it further comprises: a locking device, wherein the locking device is disposed on the main body, and the locking device is used to lock or unlock the movement of the head.

[0013] In another preferred embodiment, the device further comprises: a limiting device, wherein the limiting device is used to limit the movement of the head away from the main body, and the limiting device at least allows the head to partially separate from the main body.

[0014] In another preferred embodiment, the guiding device is a force-bearing surface, the force-bearing surface is arranged toward the cavity, the force-bearing surface is formed on the catheter structure or the discharge valve assembly, and the force-bearing surface is used to receive pressure from the power end.

[0015] In another preferred embodiment, a sensor device is provided on the compression sleeve and / or the catheter structure, and the sensor device is at least used to obtain pressure data and / or temperature data.

[0016] Due to the adoption of the above technical solution, the present invention has the following positive effects compared with the prior art:

[0017] Through the application of the present invention, a conveying system suitable for fluids such as coal slurry is provided, which is particularly suitable for the conveying of high-temperature, high-pressure, high-viscosity, and high-solid content fluids. While being easy and stable to install, it can better prevent the large-scale deposition of solid particles. In addition, the present invention can also achieve cooling and cleaning of the hydraulic end relatively easily and effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of a coal slurry conveying system of the present invention;

[0019] Figure 2It is a schematic diagram of a first embodiment of a hydraulic end of a coal slurry conveying system of the present invention;

[0020] Figure 3 It is a schematic diagram of a second embodiment of the hydraulic end of a coal slurry conveying system of the present invention.

[0021] In the attached figure:

[0022] 1. Power end; 2. Hydraulic end; 3. Valve box structure assembly; 4. Suction valve assembly; 5. Discharge valve assembly; 6. Catheter structure; 7. Cavity; 8. Main body; 9. Head; 10. Compression sleeve; 11. Annular contact part; 12. Cooling channel; 13. Guide device; 14. Locking device; 15. Limiting device; 16. Force surface; 17. Plunger; 18. Cooling water supply system. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "upper", "lower", "left", "right", "inside", "outside", "front", "back", "lateral" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] It should be specially explained that the “horizontal” and “vertical” in the present invention are used to illustrate the approximate positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

[0026] like Figure 1 and Figure 2 As shown, a coal slurry conveying system of a preferred embodiment is shown. As the first embodiment of the present invention, the coal slurry conveying system comprises: a power end 1 and a hydraulic end 2, and the power end 1 and the hydraulic end 2 are connected. Further, the power end 1 is used to provide the power required for the hydraulic end 2 to convey the liquid. Specifically, the power end 1 is provided with a reciprocating plunger 17, and the plunger 17 is arranged at a position where the power end 1 and the hydraulic end 2 are connected.

[0027] Further, as a preferred embodiment, the hydraulic end 2 includes: a valve box structure assembly 3, a suction valve assembly 4, a discharge valve assembly 5 and a conduit structure 6, the suction valve assembly 4 and the discharge valve assembly 5 are respectively installed at both ends of the valve box structure assembly 3, a cavity 7 is provided in the valve box structure assembly 3, the conduit structure 6 is arranged in the cavity 7, one end of the conduit structure 6 is arranged close to the discharge valve assembly 5, and the other end of the conduit structure 6 is arranged toward the suction valve assembly 4. Further, the conduit structure 6 is arranged in the cavity 7 so that the fluid such as coal slurry with particles is precipitated as little as possible after entering the hydraulic end 2, thereby avoiding blockage.

[0028] Further, as a preferred embodiment, the suction valve assembly 4 and the discharge valve assembly 5 are both configured as one-way valve structures.

[0029] Further, as a preferred embodiment, the circumferential outer contour of the suction valve assembly 4 and the circumferential outer contour of the discharge valve assembly 5 match the inner contours of the two ends of the cavity 7 respectively.

[0030] Further, as a preferred embodiment, there is a certain distance between the other end of the conduit structure 6 and the suction valve assembly 4, and the other end of the conduit structure 6 is provided with at least one opening in the radial direction.

[0031] Further, as a preferred embodiment, the four-way ports are preferably opened in sequence around the circumference of the conduit structure 6 .

[0032] Further, as a preferred embodiment, the valve box structure assembly 3 includes: a main body 8, a head 9 and a compression sleeve 10, the head 9 is connected to one end of the main body 8, a cavity 7 is formed between the head 9 and the main body 8, the head 9 is arranged at one end of the discharge valve assembly 5 away from the conduit structure 6, the compression sleeve 10 is arranged in the cavity 7, and the compression sleeve 10 is supported between the suction valve assembly 4 and the discharge valve assembly 5. Further, through the arrangement of the compression sleeve 10, a limiting support is formed between the suction valve assembly 4 and the discharge valve assembly 5, so that the suction valve assembly 4 and the discharge valve assembly 5 are limited.

[0033] Further, as a preferred embodiment, the head 9 has a reduced diameter end to extend into the cavity 7 and connect or contact with the discharge valve assembly 5 .

[0034] Further, as a preferred embodiment, one end of the compression sleeve 10 close to the head 9 is abutted against or connected to the outer edge of one end of the discharge valve assembly 5 away from the head 9 or one end of the conduit structure 6 .

[0035] Further, as a preferred embodiment, one end of the conduit structure 6 extends radially outward to form an annular contact portion, and the annular contact portion is disposed against the compression sleeve 10. Further, one end of the compression sleeve 10 can preferably abut against an end of the annular contact portion away from the head 9, so that the head 9, the discharge valve assembly, the annular portion of the conduit structure 6, the upper end of the compression sleeve 10, the suction valve assembly 4 and the suction valve assembly 4 abut or contact each other in sequence from top to bottom.

[0036] Further, as a preferred embodiment, the head 9, the discharge valve assembly 5, the annular portion of the conduit structure 6 and the clamping sleeve 10 can be locked on the main body 8 by the head 9 to provide a limiting force, so that the head 9, the discharge valve assembly 5, the conduit structure 6, the clamping sleeve 10 and the suction valve assembly 4 are fixed in sequence.

[0037] Further, as a preferred embodiment, the head 9, the discharge valve assembly 5, the conduit structure 6 and the compression sleeve 10 can be sequentially connected to form a whole so as to be installed or removed in one piece.

[0038] Further, as a preferred embodiment, one or more sealing rings may be provided at the circumference of the head 9 , the discharge valve assembly, and the annular portion of the conduit structure 6 to enhance the sealing performance with the cavity 7 .

[0039] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0040] The present invention also has the following implementation modes based on the above:

[0041] like Figure 3 As shown, another preferred embodiment of the coal slurry conveying system is shown, as the second embodiment of the present invention, specifically, the coal slurry conveying system also has the following characteristics:

[0042] In a further embodiment of the present invention, a cooling channel 12 is formed in the compression sleeve 10, and the cooling channel 12 has an interface end formed on the outside of the compression sleeve 10, and the interface end is connected to a cooling water supply device through a pipe body. Further, a cooling channel 12 for flowing cooling liquid is formed in the compression sleeve 10, so that when the temperature of the hydraulic end 2 is too high, the flow of cooling liquid can be driven by the external cooling water supply system 18 to achieve heat exchange in the cavity 7.

[0043] In a further embodiment of the present invention, the interface end has at least one inlet and one outlet to achieve a circulating flow of the cooling liquid.

[0044] In a further embodiment of the present invention, a connecting pipe is radially provided through the main body 8, and the connecting pipe is used for connecting the cooling water supply system 18 and the interface end.

[0045] In a further embodiment of the present invention, it further comprises: a guiding device 13, the head 9 is detachably arranged on the main body 8, and the guiding device 13 is used to guide the head 9 to be arranged away from or close to the main body 8. Further, by setting the guiding device 13, the head 9 can receive corresponding force, so as to mobilize the head 9 to move in a direction away from the main body 8, especially in a direction away from the suction valve assembly 4.

[0046] In a further embodiment of the present invention, the guide device 13 is a force-bearing surface 16, which is arranged toward the cavity 7, and is formed on the conduit structure 6 or the discharge valve assembly 5, and is used to receive pressure from the power end 1. Further, after the head 9 is unlocked from the main body 8, a certain pressure can be provided in the cavity 7 by the operation of the plunger 17 of the power end 1, and after the force-bearing surface 16 receives the pressure, the conduit structure 6, the discharge valve assembly 5, the head 9 and / or the compression sleeve 10 are moved out of the cavity 7 together, and after the removal is completed, the cleaning device can be extended into the cavity 7 and / or the compression sleeve 10 for cleaning, and any of the conduit structure 6, the discharge valve assembly 5, the head 9 and the compression sleeve 10 can also be replaced.

[0047] In a further embodiment of the present invention, the output end of the cleaning device can be extended into the conduit structure 6 along the axial direction after the head 9 and the discharge valve are removed, and high-pressure spraying is performed from the opening of the conduit structure 6 into the compression sleeve 10.

[0048] In a further embodiment of the present invention, it further comprises: a guide rod, which can form a sliding connection with the head 9, and / or the discharge valve as a whole, the conduit structure 6, and the circumferential opening at the periphery of the compression sleeve 10.

[0049] In a further embodiment of the present invention, two ends of the cavity 7 have two opening structures respectively, one of the opening structures is connected to the suction valve assembly 4, and the head 9 is installed at the other opening structure.

[0050] In a further embodiment of the present invention, a corresponding fluid outlet may be provided on the head 9 .

[0051] In a further embodiment of the present invention, before the head 9 is separated from the main body 8, other liquids such as cleaning liquid can be introduced into the hydraulic end 2 to prevent the coal slurry originally transported from being discharged in large quantities and causing pollution to the surrounding environment.

[0052] In a further embodiment of the present invention, the guide device 13 may also be an electric or pneumatic linear displacement drive device, which is arranged outside the hydraulic end 2 and is connected to at least the head 9 to drive it to move.

[0053] In a further embodiment of the present invention, the linear displacement driving device can further connect the head 9, the discharge valve assembly, the conduit structure 6 and the compression sleeve 10 through a rod structure or a rope structure, so as to drive them together.

[0054] In a further embodiment of the present invention, the head 9, the discharge valve assembly 5 and the conduit structure 6 are sequentially connected. Further, the above sequential connection can be achieved by adding additional fasteners, or welding, or integrally manufacturing, or threaded connection.

[0055] In a further embodiment of the present invention, it further comprises: a locking device 14, which is arranged on the main body 8 and is used to lock or unlock the movement of the head 9. Further, the locking device 14 is operable to lock or unlock the head 9 and the main body 8 so that they are allowed to move relative to each other.

[0056] In a further embodiment of the present invention, the locking device 14 can be a matching structure of a bolt and a thread to achieve a fixed connection to the head 9, and a hole structure matching with the bolt is opened on the end surface of the head 9 and the main body 8.

[0057] In a further embodiment of the present invention, the locking device 14 may also be a threaded structure, which is arranged at the reduced diameter end of the head 9, and a thread matching the threaded structure is arranged on the inner side of one end of the cavity 7.

[0058] In a further embodiment of the present invention, it further comprises: a limiting device 15, which is used to limit the movement of the head 9 away from the main body 8, and the limiting device 15 at least allows the head 9 to partially separate from the main body 8. Further, the limiting device 15 is used to prevent the head 9 from being excessively moved out under pressure and causing a risk to the working environment.

[0059] In a further embodiment of the present invention, the limiting device 15 is fixedly disposed on the outer side of the hydraulic end 2 along the axial direction of the cavity 7 so as to at least interfere with the head 9 moving away from the main body 8 .

[0060] In a further embodiment of the present invention, the limiting device 15 has at least one interference member, the interference member has an interference surface, and the interference surface is arranged opposite to the head 9 .

[0061] In a further embodiment of the present invention, an elastic buffer pad is provided on the interference surface, and the elastic buffer pad is used to receive the movement of the head 9.

[0062] In a further embodiment of the present invention, a sensor device is provided on the compression sleeve 10 and / or the conduit structure 6, and the sensor device is used to obtain at least pressure data and / or temperature data. Further, the control system can selectively control the operation of the cooling water supply system 18 according to the temperature data, and can determine whether the hydraulic end 2 is blocked or needs to be cleaned according to the pressure data, thereby selectively opening the head 9 for internal cleaning.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal slurry conveying system, characterized in that: include: A power end and a hydraulic end, wherein the power end and the hydraulic end are connected; The hydraulic end comprises: a valve box structure assembly, a suction valve assembly, a discharge valve assembly and a conduit structure, wherein the suction valve assembly and the discharge valve assembly are respectively installed at both ends of the valve box structure assembly, the valve box structure assembly has a cavity inside, the conduit structure is arranged in the cavity, one end of the conduit structure is arranged close to the discharge valve assembly, and the other end of the conduit structure is arranged toward the suction valve assembly; Wherein, the valve box structure assembly includes: a main body, a head and a compression sleeve, the head is connected to one end of the main body, the cavity is formed between the head and the main body, the head is arranged at one end of the discharge valve assembly away from the catheter structure, the compression sleeve is arranged in the cavity, and the compression sleeve is supported between the suction valve assembly and the discharge valve assembly.

2. The coal slurry conveying system according to claim 1, characterized in that: One end of the compression sleeve close to the head is abutted against or connected to an outer edge of one end of the discharge valve assembly away from the head or one end of the conduit structure.

3. The coal slurry conveying system according to claim 2, characterized in that: A cooling channel is formed in the compression sleeve. The cooling channel has an interface end formed on the outer side of the compression sleeve. The interface end is connected to a cooling water supply device through a pipe body.

4. The coal slurry conveying system according to claim 2, characterized in that: One end of the catheter structure radially extends outward to form an annular contact portion, and the annular contact portion is disposed against the compression sleeve.

5. The coal slurry conveying system according to claim 1, characterized in that: Also includes: The guide device is configured such that the head is detachably disposed on the main body, and the guide device is configured to guide the head to be disposed away from or close to the main body.

6. The coal slurry conveying system according to claim 5, characterized in that: The head, the discharge valve assembly and the conduit structure are connected in sequence.

7. The coal slurry conveying system according to claim 5, characterized in that: Also includes: A locking device is provided on the main body and is used to lock or unlock the movement of the head.

8. The coal slurry conveying system according to claim 5, characterized in that: Also includes: A limiting device is used to limit the movement of the head away from the main body, and the limiting device at least allows the head to partially separate from the main body.

9. The coal slurry conveying system according to claim 5, characterized in that: The guiding device is a force-bearing surface, the force-bearing surface is arranged toward the cavity, the force-bearing surface is formed on the conduit structure or the discharge valve assembly, and the force-bearing surface is used to receive pressure from the power end.

10. The coal slurry conveying system according to claim 1, characterized in that: The compression sleeve and / or the catheter structure are provided with a sensor device, and the sensor device is at least used to obtain pressure data and / or temperature data.

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