High pressure slurry pump

Abstract

This invention discloses a high-pressure mud pump, comprising: a high-pressure pump, a first valve body, a connecting rod, and a drive device; a pump head is connected to one end of the high-pressure pump; the first valve body is installed at the end of the pump head away from the high-pressure pump, and the first valve body has a through hole communicating with the pump head, with a baffle installed on the side of the through hole away from the pump head; a mud inlet is provided at the bottom of the first valve body; a scraper is installed at the first end of the connecting rod, and the scraper fits against the baffle; the drive device is connected to the second end of the connecting rod, and the drive device drives the connecting rod and the scraper to rotate. The baffle can prevent large-particle gravel residue from entering the pump head, thus avoiding the problem of rapid impeller wear and pump head blockage caused by gravel residue entering the pump head. The connecting rod and scraper can actively clean when large-particle gravel residue accumulates at the baffle, reducing the number of usable filter holes, thereby maintaining the continuous operation of the high-pressure mud pump.

Description

Technical Field

[0001] This invention belongs to the technical field of mud conveying equipment, and in particular relates to a high-pressure mud pump. Background Technology

[0002] A high-pressure mud pump is a machine used to deliver mud or water flushing fluid into the borehole during the drilling process. Mud pumps are an important component of drilling equipment. In commonly used positive circulation drilling, high-pressure mud pumps deliver surface flushing media, including clean water, mud, or polymer flushing fluid, under a certain pressure through high-pressure hoses, faucets, and the center hole of the drill string directly to the bottom of the drill bit. This is done to cool the drill bit and remove and transport the cut rock cuttings to the surface.

[0003] The mud pump disclosed in the authorization announcement number CN201696249U, although it has achieved reasonable structural design and convenient use, and has solved the technical problem of poor sealing in the prior art by setting steel balls in the left and right inlet and outlet valve seats respectively with the corresponding size of the inner cavity of the left and right inlet and outlet valve seats, has not solved the problem that the sludge generated during the construction of grouting piles will carry gravel residue during the transportation process. The gravel residue will cause rapid wear of impeller and blockage of pump head after entering the pump head. Therefore, we propose a high-pressure mud pump. Summary of the Invention

[0004] The purpose of this invention is to provide a high-pressure mud pump.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a high-pressure mud pump, comprising:

[0006] A high-pressure pump, one end of which is connected to a pump head, the high-pressure pump drives an impeller inside the pump head to rotate, and the pump head is provided with a mud outlet;

[0007] A first valve body is installed at the end of the pump head away from the high-pressure pump. The first valve body has a through hole that communicates with the pump head, and a baffle is installed on the side of the through hole away from the pump head. A mud inlet is provided at the bottom of the first valve body.

[0008] A connecting rod is rotatably mounted in the first valve body, and a scraper is installed at the first end of the connecting rod, the scraper being in contact with the baffle.

[0009] A driving device is connected to the second end of the connecting rod, and the driving device drives the connecting rod and the scraper to rotate.

[0010] The high-pressure mud pump of the present invention, as described above, further includes a second valve body, the upper part of which is connected to the lower part of the first valve body, a filter cylinder is provided inside the second valve body, and a mud inlet is provided in the middle of the second valve body.

[0011] The high-pressure mud pump of the present invention, as described above, further includes a filter cylinder with a filter hole diameter larger than that of the baffle mesh.

[0012] The high-pressure mud pump of the present invention, as described above, further includes a collecting cylinder at the lower part of the second valve body, and the collecting cylinder is connected to the second valve body by a threaded structure.

[0013] The high-pressure mud pump of the present invention, as described above, further includes a collector in the first valve body for collecting solid particles in the mud located in the first valve body.

[0014] The high-pressure mud pump of the present invention, as described above, further includes a collector comprising a vertical section, a transition section, and a horizontal section connected in sequence. The vertical section is disposed within the first valve body, and the position of the vertical section corresponds to the position of the scraper. The rotation of the scraper drives solid particles in the mud within the first valve body into the collector.

[0015] The high-pressure mud pump of the present invention, as described above, further includes a transition section or horizontal section of the collector extending out of the first valve body.

[0016] The high-pressure mud pump of the present invention, as described above, further includes a collector within the first valve body. The collector is used to collect solid particles in the mud located within the first valve body. The collector includes a vertical section, a transition section, and a horizontal section connected in sequence. The vertical section is disposed within the first valve body, and the position of the vertical section corresponds to the position of the scraper. The rotation of the scraper drives the solid particles in the mud within the first valve body into the collector. The horizontal section is connected to the collection cylinder.

[0017] The beneficial effects of this invention are as follows: By incorporating a first valve body and installing components such as a baffle and scraper within it, the baffle can prevent larger particles of gravel and debris from entering the pump head, thus avoiding rapid impeller wear and pump head blockage caused by such debris. The connecting rod and scraper can actively clean the pump when larger particles of gravel and debris accumulate at the baffle, reducing the number of usable filter holes, thereby maintaining the continuous operation of the high-pressure mud pump. Attached Figure Description

[0018] The advantages of the present invention, both above and / or other aspects, will become clearer and more readily understood through the following detailed description taken in conjunction with the accompanying drawings, which are merely illustrative and do not limit the invention, wherein:

[0019] Figure 1 This is a schematic diagram of a high-pressure mud pump according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of a high-pressure mud pump according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0022] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0023] Figure 5 This is a schematic diagram of the first valve body and the collector according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the first valve body and the collector according to an embodiment of the present invention.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. High-pressure pump, 2. Pump head, 3. First valve body, 4. Motor, 5. Connecting rod, 6. Through hole, 7. Baffle, 8. Scraper, 9. Second valve body, 10. Filter cartridge, 11. Collection cartridge, 12. Mechanical seal, 13. Impeller, 14. Mud outlet, 15. Mud inlet, 16. Collector, 161. Vertical section, 162. Transition section, 163. Horizontal section. Detailed Implementation

[0027] In the following description, embodiments of the high-pressure mud pump of the present invention will be described with reference to the accompanying drawings.

[0028] The embodiments described herein are specific implementations of the present invention, used to illustrate the concept of the invention, and are illustrative and exemplary, and should not be construed as limiting the implementation or scope of the invention. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those that make any obvious substitutions and modifications to the embodiments described herein.

[0029] The accompanying drawings in this specification are schematic diagrams to aid in illustrating the concept of the invention, and schematically show the shapes of the various parts and their interrelationships. Please note that, in order to clearly demonstrate the structure of the components in the embodiments of the invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0030] To address the problem of clogging in high-pressure mud pumps, embodiments of the present invention provide a high-pressure mud pump, such as... Figures 1-4 As shown, it includes:

[0031] A high-pressure pump 1 is connected to a pump head 2 at one end. The high-pressure pump 1 drives the impeller 13 inside the pump head 2 to rotate. The pump head 2 is provided with a mud outlet 14. The high-pressure pump 1 is usually composed of a housing and a motor 4 installed inside the housing. Figure 1 In this pump head, which is roughly cylindrical in shape, the main part of the pump head is the drive motor. One end of the pump head is connected to the high-pressure pump, meaning the drive motor is connected to the impeller inside the pump head to drive the impeller. The pump head includes a housing and an impeller, with the impeller installed inside the housing. The shaft of the drive motor is sealed to the outer casing of the pump head by a mechanical seal 12.

[0032] The first valve body 3 is installed at the end of the pump head 2 away from the high-pressure pump 1. The first valve body 3 has a through hole 6 that communicates with the pump head 2. A sealing gasket or sealant can be used at the connection between the first valve body and the pump head to achieve a seal at the docking position. A baffle 7 is installed on the side of the through hole 6 away from the pump head 2. The bottom of the first valve body 3 has a mud inlet. The mud enters the first valve body through the mud inlet and flows towards the through hole, passing through the baffle before entering the through hole. Larger particles such as gravel in the mud are intercepted by the baffle, preventing gravel from entering the pump head and damaging the impeller.

[0033] A connecting rod 5 is rotatably disposed within the first valve body 3. A scraper 8 is installed at the first end of the connecting rod 5, and the scraper 8 is in contact with the baffle 7. Specifically, the connecting rod can be supported and installed via a base connected to the first valve body, or as... Figure 2 As shown, the first valve body is roughly cylindrical in shape. One end of the cylindrical structure is connected to the pump head, and a connecting rod is inserted into the other end of the cylindrical structure. The drive device is connected to the second end of the connecting rod 5. The drive equipment, such as the motor, is located outside the first valve body. The drive device drives the connecting rod 5 and the scraper 8 to rotate.

[0034] In the embodiments of the high-pressure mud pump described above, a first valve body is provided, and components such as a baffle and scraper are installed within the first valve body. The baffle can prevent larger particles of gravel and debris from entering the pump head, thereby avoiding the problems of rapid impeller wear and pump head blockage caused by gravel and debris entering the pump head. The connecting rod and scraper can actively clean the pump when larger particles of gravel and debris accumulate at the baffle position, reducing the number of available filter holes, thus maintaining the continuous operation of the high-pressure mud pump.

[0035] During long-term operation, the high-pressure mud pump of the above embodiment accumulates a large amount of gravel residue in the first valve body, which can lead to the scraper being blocked or the filter holes of the baffle being obstructed, thus affecting the operation of the high-pressure mud pump. A further improvement to the high-pressure mud pump of the above embodiment is made: the high-pressure mud pump also includes a second valve body 9, the upper part of which is connected to the lower part of the first valve body 3, with the connection point being a conductive structure (i.e., a corresponding conductive hole is provided at the connection point). A filter cylinder 10 is provided inside the second valve body 9, covering the conductive hole of the second valve body. A mud inlet 15 is provided in the middle of the second valve body 9. The mud enters through the mud inlet of the second valve body and undergoes primary filtration through the filter cylinder, reducing the amount of gravel residue in the mud entering the first valve body. This reduces the amount of gravel residue that needs to be intercepted by the baffle, increasing the filtration and blocking time of the first valve body. In addition, the gravel residue blocked by the baffle falls to the bottom of the first valve body under the action of gravity, and then some of the gravel residue falls into the filter cylinder of the second valve body through the guide hole, which reduces the amount of gravel residue that needs to be retained in the first valve body to a certain extent.

[0036] In one specific embodiment, the filter hole diameter of the filter cartridge 10 is larger than the filter hole diameter of the baffle 7. In this embodiment, the filter cartridge in the second valve body performs primary filtration, and the baffle in the first valve body performs secondary filtration. By setting the primary filtration, the filtration volume of the secondary filtration can be reduced, thereby increasing the continuous operating time of the mud pump. In a preferred embodiment, such as... Figure 4 As shown, a collection cylinder 11 is provided at the lower part of the second valve body 9, and the collection cylinder 11 is connected to the second valve body 9 by a threaded structure. Since the filter hole diameter of the filter cylinder of the second valve body is relatively large, the volume and weight of the gravel residue it intercepts are also relatively large, and it can be deposited into the collection cylinder by gravity, thereby improving the filtration service time of the second valve body. Furthermore, the gravel residue in the collection cylinder can be easily cleaned through the threaded connection.

[0037] Through using the high-pressure mud pump with the above-described structure, the inventors discovered that with prolonged operation, gravel residue accumulates inside the first valve body, eventually requiring disassembly for cleaning, which leads to equipment downtime. Furthermore, disassembling the first valve body in the above-described structure is quite cumbersome, increasing the difficulty of cleaning and maintenance. Therefore, in a preferred embodiment, a collector 16 is also provided inside the first valve body 3. The collector 16 is used to collect solid particles (including gravel residue) in the mud located inside the first valve body 3.

[0038] In a preferred embodiment, the collector 16 includes a vertical section 161, a transition section 162, and a horizontal section 163 connected in sequence. The vertical section 161 is disposed within the first valve body 3, and its position corresponds to the position of the scraper 8. The rotation of the scraper 8 drives solid particles in the slurry within the first valve body 3 into the collector 16. The transition section 162 or the horizontal section 163 of the collector 16 extends out of the first valve body 3. Figure 5 and Figure 6 As shown, the transition section has a 90-degree bend, and the transition section 162 of the collector 16 passes through the first valve body 3 (i.e., the transition section is partially inside the first valve body and partially outside the first valve body). Combined Figure 5 and Figure 6 The specific structure includes a first valve body that is cylindrical, with the connecting rod located on the axis of the first valve body. The scraper is positioned close to the baffle, with its end spaced a certain distance from the cylinder wall of the first valve body (e.g., 2-5 cm). To prevent the collector from colliding with the rotating scraper, it needs to be placed outside the space swept by the scraper. The vertical section is vertically oriented, with its opening facing downwards. With this arrangement, if the size of particles such as gravel and debris in the slurry within the first valve body is smaller than the filter aperture of the baffle, most will pass through the filter and enter the pump head, eventually being discharged from the sludge outlet. Particles larger than the filter aperture of the baffle are blocked by the baffle and can rotate within the first valve body under the action of the scraper. Figure 5The scraper needs to rotate counterclockwise, causing the particles to rotate counterclockwise as well. This means that during the rotation, the particles move upwards in the vertical section of the collector. Larger particles, due to their greater inertia, continue moving upwards after entering the vertical section opening and then into the transition and horizontal sections. A storage structure, such as a collection cylinder, can be installed at the horizontal section opening to store the particles, thereby increasing the operating time of the high-pressure mud pump and avoiding the need to disassemble the first valve body for cleaning. Regarding the design with the vertical section opening facing upwards, the inventors discovered that particles smaller than the filter mesh aperture (which should normally pass through the mesh into the pump head and be discharged from the outlet) fall into the vertical section and accumulate in the transition section, increasing the collector's capacity and potentially causing blockage. Therefore, the design with the vertical section opening facing upwards avoids this problem and is a superior technical solution.

[0039] In another embodiment of the high-pressure mud pump, a collector 16 is provided inside the first valve body 3. The collector 16 is used to collect solid particles in the mud located inside the first valve body 3. The collector 16 includes a vertical section 161, a transition section 162, and a horizontal section 163 connected in sequence. The vertical section 161 is located inside the first valve body 3, and its position corresponds to the position of the scraper 8, with the opening of the vertical section facing downwards. The rotation of the scraper 8 drives the solid particles in the mud inside the first valve body 3 into the collector 16. The horizontal section 163 is connected to the collection cylinder 11, specifically through a conduit with a suitable inner diameter. This embodiment is similar in principle to the previous embodiment, except that the connection between the horizontal section and the collection cylinder allows the particles entering the collector to be ultimately collected into the collection cylinder of the second valve body. Since the collection cylinder and the second valve body are connected by a threaded structure, it has the advantage of convenient cleaning and maintenance. In other words, the collecting cylinder of the second valve body in this invention has a dual function: the first function is to collect larger solid particles that are blocked by the filter barrel in the mud, and the second function is to collect solid particles that enter the collector.

[0040] The technical features disclosed above are not limited to the combinations of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A high-pressure mud pump, characterized in that, include: A high-pressure pump, one end of which is connected to a pump head, the high-pressure pump drives an impeller inside the pump head to rotate, and the pump head is provided with a mud outlet; A first valve body is installed at the end of the pump head away from the high-pressure pump. The first valve body has a through hole that communicates with the pump head, and a baffle is installed on the side of the through hole away from the pump head. A mud inlet is provided at the bottom of the first valve body. A connecting rod is rotatably mounted in the first valve body, and a scraper is installed at the first end of the connecting rod, the scraper being in contact with the baffle. A driving device is connected to the second end of the connecting rod, and the driving device drives the connecting rod and the scraper to rotate. A collector is also provided inside the first valve body, used to collect solid particles in the slurry within the first valve body. The collector includes a vertical section, a transition section, and a horizontal section connected in sequence. The vertical section is located inside the first valve body, and its position corresponds to the position of the scraper. The vertical section is vertically positioned, and its opening faces downwards. The rotation of the scraper drives solid particles in the slurry within the first valve body into the collector. The horizontal section is connected to a collection cylinder.

2. The high-pressure mud pump according to claim 1, characterized in that, It also includes a second valve body, the upper part of which is connected to the lower part of the first valve body. The second valve body has a filter cylinder inside and a mud inlet in the middle.

3. The high-pressure mud pump according to claim 2, characterized in that, The diameter of the filter holes in the filter cylinder is larger than the diameter of the filter holes in the baffle.

4. The high-pressure mud pump according to claim 3, characterized in that, The lower part of the second valve body is provided with a collection cylinder, and the collection cylinder is connected to the second valve body by a threaded structure.

5. The high-pressure mud pump according to claim 4, characterized in that, The transition section or horizontal section of the collector extends out of the first valve body.

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