Pressure reducing device for mud pump of drilling machine

Abstract

The invention relates to the field of drilling equipment, in particular to a drilling machine slurry pump pressure reducing device which comprises a fixing assembly, a drilling assembly, a grinding assembly and a transmission assembly, the fixing assembly is fixedly arranged on the ground surface, the drilling assembly comprises a driving part, a drilling rod, a drilling bit and a sleeving pipe, the driving part is arranged on the fixing assembly, the drilling rod is arranged in the vertical direction, and the drilling rod is arranged in the sleeving pipe; the driving piece drives the drill rod to move in the vertical direction, the drill bit is fixedly connected to the bottom end of the drill rod, the sleeving pipe sleeves the drill rod, the drill rod is provided with a water outlet channel communicated with a water outlet of a slurry pump, the drill bit is provided with water spraying holes, and the water spraying holes are communicated with the water outlet channel; a slurry suction channel is formed in the sleeving pipe and communicates with a water inlet of the slurry pump, and the grinding assembly is arranged on the inner wall of the end, close to the drill bit, of the slurry suction channel. The drill rod drives the grinding assembly to grind rock debris through the transmission assembly. The situation that the pump pressure rises can be reduced, and normal work of the slurry pump is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of drilling equipment, and in particular to a drilling rig mud pump pressure reducing device. Background Art

[0002] A drilling rig is a mechanical device that drives the drill to drill underground to obtain physical geological data during the exploration or development of mineral resources (including solid minerals, liquid minerals, gas minerals, etc.). The mud pump is an important component of it. The mud pump can send the surface flushing medium such as clean water or polymer flushing liquid under a certain pressure through a high-pressure hose, a faucet and the center hole of the drill string directly to the bottom of the drill bit to cool the drill bit. The clean water will mix with the cuttings cut from the borehole to form mud. The mud pump can also remove the mud in the borehole and transport it to the surface.

[0003] However, since there are occasionally large diameter debris in the borehole, blockage may occur when the mud pump is pumping the mud in the borehole to the surface, causing the pump pressure to increase and the mud pump to fail to work normally. Summary of the invention

[0004] In order to reduce the occurrence of increased pump pressure and ensure the normal operation of the mud pump, the present application provides a drilling rig mud pump pressure reducing device.

[0005] The present application provides a drilling rig mud pump pressure reducing device, which adopts the following technical solution: A drilling rig mud pump decompression device comprises a fixing assembly, a drilling assembly, a grinding assembly and a transmission assembly, wherein the fixing assembly is fixedly arranged on the ground surface, the drilling assembly comprises a driving member, a drill rod, a drill bit and a casing, the driving member is arranged on the fixing assembly, the drill rod is arranged in a vertical direction, the driving member drives the drill rod to move in a vertical direction, the drill bit is fixedly connected to the bottom end of the drill rod, the casing is sleeved on the drill rod, the drill rod is provided with a water outlet channel connected to a water outlet of a mud pump, the drill bit is provided with a water spray hole, and the water spray hole is connected to the water outlet channel; the casing is provided with a slurry suction channel, the slurry suction channel is connected to a water inlet of the mud pump, and the grinding assembly is arranged on the inner wall of the slurry suction channel close to one end of the drill bit; the drill rod drives the grinding assembly to grind rock cuttings through the transmission assembly.

[0006] By adopting the above technical solution, the fixing component is fixedly installed on the ground, the driving component is started, and the driving component drives the drill rod to drive the drill bit to rotate and move downward at the same time, drilling a hole downward from the ground, and the mud pump pumps clean water into the water outlet channel and sprays it out from the water spray hole to cool the drill bit. The clean water is mixed with the rock cuttings cut from the borehole to form mud, which is sucked into the slurry suction channel. At the same time, the drill rod drives the grinding component through the transmission component to grind the rock cuttings with larger diameters in the mud so that they can pass through the slurry suction channel smoothly, thereby preventing the rock cuttings from clogging the slurry suction channel and causing the mud pump to fail to work normally.

[0007] Optionally, the grinding assembly includes a rotating block, a pressing spring and a plurality of grinding blades. A mounting groove is provided on the inner wall of the slurry suction channel. The rotating block is rotatably connected in the mounting groove. One end of the pressing spring is fixedly connected to the side wall of the rotating block, and the other end is rotatably connected to the inner bottom wall of the mounting groove. The plurality of grinding blades are all arranged at one end of the rotating block away from the drill rod. When the pressing spring is in a compressed state, the rotating block is connected to the transmission assembly.

[0008] By adopting the above technical solution, when rock chips with larger diameter are stuck in the slurry suction channel, the rotating block will be squeezed, so that the pressing spring is in a compressed state. At this time, the rotating block is connected to the transmission assembly. When the driving part is started, the rotating block is driven to rotate through the transmission assembly, so that the grinding blade cuts the rock chips, reducing the diameter of the rock chips so that they can pass through the slurry suction channel smoothly, preventing the mud pump pressure from increasing and reducing the possibility of mud pump blockage.

[0009] Optionally, the transmission assembly includes a driving bevel gear, a rotating shaft and a driven bevel gear, the driving bevel gear is coaxially fixedly connected to the drill rod, the rotating shaft is rotatably connected to the bottom of the mounting groove, and when the pressing spring is in a contracted state, the rotating shaft is keyed to the rotating block, the driven bevel gear is coaxially fixedly connected to the rotating shaft, and is meshingly connected to the driving bevel gear.

[0010] By adopting the above technical solution, the driving member drives the drill rod to rotate, the drill rod drives the active bevel gear to rotate, the active bevel gear drives the driven bevel gear to drive the rotating shaft to rotate, when cuttings are stuck in the slurry suction channel and the rotating block is squeezed, the rotating block is key-connected with the rotating shaft, so that it rotates synchronously with the rotating shaft, and the grinding blade cuts the cuttings without adding an additional power source, thus saving energy.

[0011] Optionally, a storage cavity is provided on the rotating block, a storage telescopic rod is provided on the inner wall of the storage cavity close to the pressure spring, the fixed end of the storage telescopic rod is fixedly connected to the inner wall of the storage cavity, the movable end of the storage telescopic rod is fixedly connected to a mounting plate, the multiple grinding blades are arranged on the mounting plate, and a plurality of connecting holes for accommodating the grinding blades to pass through are provided on the side wall of the storage cavity away from the pressure spring, and the grinding blades correspond to the connecting holes one by one.

[0012] By adopting the above technical solution, when mud passes through the slurry suction channel normally, there is no need to grind the rock chips. At this time, the storage telescopic rod contracts, driving the mounting plate to drive the grinding blade into the storage chamber, thereby reducing the collision between the rock chips and the grinding blade. When rock chips with larger diameters are stuck in the slurry suction channel, the storage telescopic rod extends, allowing the grinding blade to extend out of the connecting hole to grind the rock chips, thereby achieving the effect of extending the service life of the grinding blade.

[0013] Optionally, an extruded telescopic rod is provided on the inner bottom wall of the mounting groove, one end of the extruded telescopic rod is fixedly connected to the inner bottom wall of the mounting groove, and the other end is fixedly connected to the rotating block, and the rodless cavity of the extruded telescopic rod is connected to the rodless cavity for storing the telescopic rod.

[0014] By adopting the above technical solution, when rock chips with a larger diameter are stuck in the slurry suction channel, the rotating block is pressed in the direction close to the driven bevel gear, so that the extrusion telescopic rod contracts, and the medium in the rodless cavity of the extrusion telescopic rod is pressed into the rodless cavity of the storage telescopic rod. The storage telescopic rod extends, driving the mounting plate to drive the grinding blade to move in the direction away from the pressing spring, so that the grinding blade extends out of the connecting hole to grind the rock chips.

[0015] Optionally, a giveway groove is provided on the side wall of the rotating shaft close to the rotating block, a return spring is arranged in the giveway groove, an end of the return spring away from the bottom wall of the giveway groove is fixedly connected to a clamping block, and the clamping block is provided with guide inclined surfaces on the side close to the rotating block and the side away from the rotating block, and an insertion groove for accommodating the partial embedding of the rotating shaft is provided on the side wall of the rotating block close to the pressing spring, and a key groove for accommodating the embedding of the clamping block is provided on the inner wall of the insertion groove.

[0016] By adopting the above technical solution, when the rotating block is pressed toward the driven bevel gear by rock chips with larger diameter, the rotating shaft is partially embedded in the plug-in slot. At this time, the clamping block is pressed into the yielding slot. When the rotating shaft is rotated until the clamping block is opposite to the key slot, the clamping block will pop out under the elastic recovery action of the reset spring and be embedded in the key slot. At this time, the rotating block rotates with the rotating shaft, so that the grinding blade cuts the rock chips, avoiding the situation where the rotating shaft cannot be inserted into the plug-in slot.

[0017] Optionally, the driven bevel gear, the rotating shaft and the grinding assembly are each provided in plurality along the circumferential direction of the axis of the drill rod.

[0018] By adopting the above technical solution, the rock cuttings stuck in different positions in the slurry suction channel can be ground, further reducing the possibility of increasing the pump pressure of the mud pump.

[0019] Optionally, a toggle rod is provided on the side wall of the bottom of the drill rod, and the toggle rod is rotatably connected to the sleeve tube.

[0020] By adopting the above technical solution, the pushing rod will rotate with the drill rod, and the rock cuttings that cannot enter the grout suction channel will be pushed away, ensuring that the mud can smoothly enter the grout suction channel.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the rock cuttings with a larger diameter are stuck in the slurry suction channel, the rotating block will be squeezed, so that the pressing spring is in a compressed state. At this time, the rotating block is connected to the transmission assembly. When the driving part is started, the rotating block is driven to rotate through the transmission assembly, so that the grinding blade cuts the rock cuttings, reducing the diameter of the rock cuttings so that they can pass through the slurry suction channel smoothly, preventing the mud pump pressure from increasing and reducing the possibility of mud pump blockage; 2. When the mud passes through the suction channel normally, there is no need to grind the rock chips. At this time, the storage telescopic rod contracts, driving the mounting plate to drive the grinding blade into the storage chamber to reduce the collision between the rock chips and the grinding blade. When there are large-diameter rock chips stuck in the suction channel, the storage telescopic rod extends, so that the grinding blade extends out of the connecting hole to grind the rock chips, thereby extending the service life of the grinding blade. 3. When the rotating block is pressed toward the driven bevel gear by the rock chips with larger diameter, the rotating shaft is partially embedded in the plug-in slot. At this time, the clamping block is pressed into the clearance slot. When the rotating shaft rotates until the clamping block is opposite to the key slot, the clamping block will pop out under the elastic recovery action of the reset spring and embed into the key slot. At this time, the rotating block rotates with the rotating shaft, so that the grinding blade cuts the rock chips, avoiding the situation that the rotating shaft cannot be inserted into the plug-in slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the drilling rig mud pump pressure relief device of the present application; Figure 2 is a cross-sectional view of the drilling rig mud pump pressure relief device of the present application; Figure 3 yes Figure 2 Enlarged view of part A.

[0023] Explanation of the reference numerals: 1. fixing assembly; 2. drilling assembly; 21. driving member; 211. motor; 212. hydraulic rod; 213. connecting plate; 22. drill rod; 221. water outlet channel; 23. drill bit; 231. water spray hole; 24. sleeve tube; 241. slurry suction channel; 242. mounting groove; 3. grinding assembly; 31. rotating block; 311. storage chamber; 312. connecting hole; 313. plug-in slot; 314. keyway; 32. pressing spring; 33. storage telescopic rod; 34. mounting plate; 35. grinding blade; 4. transmission assembly; 41. driving bevel gear; 42. rotating shaft; 43. driven bevel gear; 5. mud pump; 6. toggle rod; 7. extrusion telescopic rod; 8. reset spring; 9. clamping block. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-3 This application is described in further detail.

[0025] Reference Figure 1 , Figure 2 and Figure 3 A drilling rig mud pump decompression device disclosed in an embodiment of the present application includes a fixing component 1, a drilling component 2, a grinding component 3 and a transmission component 4. The fixing component 1 is fixedly installed on the ground. In this embodiment, the fixing component 1 is a tower, and the drilling component 2 is installed on the tower, which can drill a hole from the ground downward in a vertical direction. The grinding component 3 is arranged on the drilling component 2, and the drilling component 2 drives the grinding component 3 to work through the transmission component 4.

[0026] Reference Figure 1 and Figure 2The drilling assembly 2 includes a driving member 21, a drill rod 22, a drill bit 23 and a sleeve 24. In this embodiment, the driving member 21 includes a motor 211, a hydraulic rod 212 and a connecting plate 213. The hydraulic rod 212 is fixedly installed on the tower in the vertical direction. The movable end of the hydraulic rod 212 is fixedly connected to the connecting plate 213. The motor 211 is fixedly connected to the connecting plate 213. The output shaft of the motor 211 is passed through and rotatably connected to the connecting plate 213. The drill rod 22 is arranged in the vertical direction. The top of the drill rod 22 is fixedly connected to the output shaft of the motor 211. A water outlet channel 221 is opened in the drill rod 22 in the vertical direction. The top of the water outlet channel 221 is connected to the water outlet of the mud pump 5. The drill bit 23 is fixedly connected to the bottom end of the drill rod 22. The drill bit 23 is provided with a plurality of water spray holes 231, which are all connected to the water outlet channel 221. Clean water is pumped into the water outlet channel 221 by the mud pump 5 and sprayed out from the water spray holes 231 to cool the drill bit 23 and mix with the soil and rock cuttings in the borehole to form mud. The casing 24 is coaxially sleeved on the drill rod 22. The top of the casing 24 is fixedly connected to the connecting plate 213. That is, the drill rod 22 is rotatably connected to the casing 24. A slurry suction channel 241 is provided in the casing 24. The top of the slurry suction channel 241 is connected to the water inlet of the mud pump 5.

[0027] A toggle rod 6 is fixedly installed in the horizontal direction on the lower side wall of the drill pipe 22, and the toggle rod 6 is rotatably connected to the lower part of the casing pipe 24. Some rock cuttings larger than the diameter of the slurry suction channel 241 will be stuck at the bottom of the slurry suction channel 241 under the suction force of the mud pump 5, and cannot enter the slurry suction channel 241. As the mud pump 5 works, more and more rock cuttings will accumulate at the bottom of the slurry suction channel 241, which may cause the slurry suction channel 241 to be blocked. When the toggle rod 6 rotates, these rock cuttings can be moved to other positions to ensure that the mud can smoothly enter the slurry suction channel 241.

[0028] Reference Figure 3The grinding assembly 3 is arranged on the inner wall of the slurry suction channel 241 close to the drill rod 22, and is located at one end of the slurry suction channel 241 close to the drill bit 23. Multiple groups of grinding assemblies 3 are arranged along the circumferential direction of the axis of the sleeve 24. Each grinding assembly 3 includes a rotating block 31, a pressing spring 32, a storage telescopic rod 33, a mounting plate 34 and a plurality of grinding blades 35. A mounting groove 242 is provided on the inner wall of the slurry suction channel 241. The mounting groove 242 corresponds to the rotating block 31 one by one. The rotating block 31 is a cylinder and is rotatably connected to the mounting groove 242. One end of the pressing spring 32 is rotatably connected to the inner bottom wall of the mounting groove 242, and the other end is fixedly connected to the side wall of the rotating block 31 close to the drill rod 22. A storage chamber 311 is provided in the rotating block 31. The fixed end of the storage telescopic rod 33 is fixedly installed on the inner wall of the storage chamber 311 close to the drill rod 22. The movable end of the storage telescopic rod 33 is fixedly connected to the mounting plate 34. The mounting plate 34 is arranged in the vertical direction. A plurality of grinding blades 35 are fixedly installed on the side wall of the mounting plate 34 away from the drill rod 22. A plurality of connecting holes 312 for accommodating the grinding blades 35 to pass through are opened on the side wall of the storage chamber 311 away from the drill rod 22.

[0029] It should be added that an extruded telescopic rod 7 is also installed on the inner wall of the mounting groove 242 near the drill rod 22, the fixed end of the extruded telescopic rod 7 is fixedly connected to the inner wall of the mounting groove 242, the movable end of the extruded telescopic rod 7 is fixedly connected to the side wall of the rotating block 31, and the rodless cavity of the extruded telescopic rod 7 is connected to the rodless cavity for storing the telescopic rod 33.

[0030] When the mud in the slurry suction channel 241 flows normally, the pressing spring 32 is in a normal state, the rotating block 31 partially extends out of the mounting slot 242, and the storage telescopic rod 33 is in a retracted state, driving the mounting plate 34 to drive the multiple grinding blades 35 to be stored in the storage chamber 311, which can reduce the collision between the rock chips in the mud and the grinding blades 35, thereby extending the service life of the grinding blades 35. When rock cuttings with a larger diameter enter the grout suction channel 241, the rock cuttings will be stuck in the grout suction channel 241, squeezing the rotating block 31 and causing the rotating block 31 to move toward the drill pipe 22. At this time, the pressing spring 32 and the squeezing telescopic rod 7 are both in a compressed state, and the medium in the rodless cavity of the squeezing telescopic rod 7 will be pressed into the rodless cavity of the receiving telescopic rod 33, driving the receiving telescopic rod 33 to extend, pushing the mounting plate 34 to drive the grinding blade 35 to move away from the pressing spring 32, so that the grinding blade 35 can extend from the corresponding connecting hole 312, grind the rock cuttings, reduce the diameter of the rock cuttings, and enable it to pass through the grout suction channel 241 smoothly.

[0031] Reference Figure 2 and Figure 3The transmission assembly 4 includes a driving bevel gear 41, a plurality of rotating shafts 42 and a plurality of driven bevel gears 43. The driving bevel gear 41 is coaxially fixedly connected to the drill rod 22. The plurality of rotating shafts 42 correspond to the plurality of mounting grooves 242 one by one. The rotating shaft 42 is rotatably connected to the sleeve tube 24. The end of the rotating shaft 42 away from the drill rod 22 is partially exposed in the mounting groove 242. The side wall of the rotating block 31 close to the pressing spring 32 is provided with a plug-in groove 313 for accommodating the partial embedding of the rotating shaft 42. The plurality of driven bevel gears 43 correspond to the plurality of rotating shafts 42 one by one. The driven bevel gears 43 are coaxially fixedly connected to the rotating shaft 42. The plurality of driven bevel gears 43 are all meshedly connected with the driving bevel gear 41.

[0032] A clearance groove is provided on the side wall of the end of the rotating shaft 42 exposed in the installation groove 242, and a return spring 8 is fixedly connected in the clearance groove. The end of the return spring 8 away from the bottom wall of the clearance groove is fixedly connected to a clamping block 9. The clamping block 9 is provided with guiding inclined surfaces on the side close to the rotating block 31 and the side away from the rotating block 31. A key groove 314 for accommodating the clamping block 9 to be embedded is provided on the inner wall of the plug-in groove 313.

[0033] The output shaft of the motor 211 drives the drill rod 22 to rotate, and the drill rod 22 drives the active bevel gear 41 to rotate. The active bevel gear 41 drives the driven bevel gear 43 to drive the rotating shaft 42 to rotate. When the rock cuttings with a larger diameter are stuck in the slurry suction channel 241 and squeeze the rotating block 31, the rotating block 31 moves toward the direction close to the inner bottom wall of the installation groove 242. At this time, the rotating shaft 42 is inserted into the plug-in groove 313, and the side wall of the plug-in groove 313 presses the clamping block 9 into the yielding groove along the guide inclined surface. As the rotating shaft 42 rotates, when the clamping block 9 is directly opposite to the key slot 314, the clamping block 9 pops out under the elastic resetting action of the resetting spring 8, and is clamped in the key slot 314, and the rotating block 31 rotates with the rotating shaft 42.

[0034] The implementation principle of the drilling rig mud pump pressure relief device of the present application embodiment is as follows: the output shaft of the motor 211 drives the drill rod 22 to rotate, and when the drill rod 22 drives the drill bit 23 to drill a hole downward from the ground, the mud pump 5 pumps clean water into the water outlet channel 221 and sprays it out from the water spray hole 231 to cool the drill bit 23, and the clean water is mixed with the rock cuttings cut from the borehole to form mud, which is sucked in by the mud suction channel 241. At the same time, the drill rod 22 also drives the active bevel gear 41 to rotate, and the active bevel gear 41 drives the driven bevel gear 43 to drive the rotating shaft 42 to rotate.

[0035] When rock cuttings with a larger diameter are stuck in the grout suction channel 241, the rotating block 31 is squeezed, causing the rotating block 31 to move toward the drill pipe 22. At this time, the pressing spring 32 and the squeezing telescopic rod 7 are both in a compressed state. The medium in the rodless cavity of the squeezing telescopic rod 7 will be pressed into the rodless cavity of the receiving telescopic rod 33, driving the receiving telescopic rod 33 to extend, pushing the mounting plate 34 to drive the grinding blade 35 to move away from the pressing spring 32, so that the grinding blade 35 can extend from the corresponding connecting hole 312. At the same time, the rotating shaft 42 will be inserted into the plug-in groove 313, and the side wall of the plug-in groove 313 will press the clamping block 9 into the yield groove along the guiding inclined surface. As the rotating shaft 42 rotates, when the clamping block 9 is directly opposite to the key groove 314, the clamping block 9 pops out under the elastic reset action of the reset spring 8 and is clamped in the key groove 314. The rotating block 31 rotates with the rotating shaft 42, and the grinding blade 35 rotates accordingly to grind the rock chips, reduce the diameter of the rock chips, and enable them to pass through the slurry suction channel 241 smoothly, thereby reducing the occurrence of increased pump pressure and ensuring the normal operation of the mud pump 5.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A drilling rig mud pump pressure relief device, characterized in that: The invention comprises a fixing assembly (1), a drilling assembly (2), a grinding assembly (3) and a transmission assembly (4); the fixing assembly (1) is fixedly arranged on the ground surface; the drilling assembly (2) comprises a driving member (21), a drill rod (22), a drill bit (23) and a sleeve (24); the driving member (21) is arranged on the fixing assembly (1); the drill rod (22) is arranged in a vertical direction; the driving member (21) drives the drill rod (22) to move in a vertical direction; the drill bit (23) is fixedly connected to the bottom end of the drill rod (22); the sleeve (24) is sleeved on the drill rod (22); The drill rod (22) is provided with a water outlet channel (221) connected to a water outlet of a mud pump (5); the drill bit (23) is provided with a water spray hole (231), the water spray hole (231) being connected to the water outlet channel (221); the sleeve (24) is provided with a slurry suction channel (241), the slurry suction channel (241) being connected to a water inlet of the mud pump (5); the grinding assembly (3) is arranged on the inner wall of the slurry suction channel (241) close to one end of the drill bit (23); the drill rod (22) drives the grinding assembly (3) to grind rock cuttings through the transmission assembly (4).

2. The drilling rig mud pump pressure reducing device according to claim 1, characterized in that: The grinding assembly (3) comprises a rotating block (31), a pressing spring (32) and a plurality of grinding blades (35); a mounting groove (242) is provided on the inner wall of the slurry suction channel (241); the rotating block (31) is rotatably connected in the mounting groove (242); one end of the pressing spring (32) is fixedly connected to the side wall of the rotating block (31), and the other end is rotatably connected to the inner bottom wall of the mounting groove (242); the plurality of grinding blades (35) are all arranged at an end of the rotating block (31) away from the drill rod (22); and when the pressing spring (32) is in a compressed state, the rotating block (31) is connected to the transmission assembly (4).

3. The drilling rig mud pump pressure reducing device according to claim 2, characterized in that: The transmission assembly (4) comprises a driving bevel gear (41), a rotating shaft (42) and a driven bevel gear (43); the driving bevel gear (41) is coaxially fixedly connected to the drill rod (22); the rotating shaft (42) is rotatably connected to the bottom of the mounting groove (242); when the pressing spring (32) is in a contracted state, the rotating shaft (42) is key-connected to the rotating block (31); the driven bevel gear (43) is coaxially fixedly connected to the rotating shaft (42) and meshingly connected to the driving bevel gear (41).

4. The drilling rig mud pump pressure reducing device according to claim 2, characterized in that: The rotating block (31) is provided with a storage cavity (311), and a storage telescopic rod (33) is provided on the inner wall of the storage cavity (311) close to the pressing spring (32), the fixed end of the storage telescopic rod (33) is fixedly connected to the inner wall of the storage cavity (311), and the movable end of the storage telescopic rod (33) is fixedly connected to a mounting plate (34), the plurality of grinding blades (35) are arranged on the mounting plate (34), and a plurality of connection holes (312) capable of accommodating the grinding blades (35) to pass through are provided on the side wall of the storage cavity (311) away from the pressing spring (32), and the grinding blades (35) correspond to the connection holes (312) one by one.

5. The drilling rig mud pump pressure reducing device according to claim 4, characterized in that: An extruded telescopic rod (7) is provided on the inner bottom wall of the mounting groove (242); one end of the extruded telescopic rod (7) is fixedly connected to the inner bottom wall of the mounting groove (242), and the other end is fixedly connected to the rotating block (31); the rodless cavity of the extruded telescopic rod (7) is in communication with the rodless cavity of the storage telescopic rod (33).

6. The drilling rig mud pump pressure reducing device according to claim 3, characterized in that: A clearance groove is provided on the side wall of the rotating shaft (42) close to the rotating block (31), a return spring (8) is arranged in the clearance groove, one end of the return spring (8) away from the bottom wall of the clearance groove is fixedly connected to a clamping block (9), and the clamping block (9) is provided with a guide inclined surface on the side close to the rotating block (31) and the side away from the rotating block (31), and a plug-in groove (313) capable of accommodating the partial embedding of the rotating shaft (42) is provided on the side wall of the rotating block (31) close to the pressing spring (32), and a key groove (314) capable of accommodating the embedding of the clamping block (9) is provided on the inner wall of the plug-in groove (313).

7. The drilling rig mud pump pressure reducing device according to claim 6, characterized in that: The driven bevel gear (43), the rotating shaft (42) and the grinding assembly (3) are all arranged in plurality along the circumferential direction of the axis of the drill rod (22).

8. The drilling rig mud pump pressure reducing device according to claim 1, characterized in that: A toggle rod (6) is provided on the side wall at the bottom of the drill rod (22), and the toggle rod (6) is rotatably connected to the sleeve tube (24).

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