A mud-pumping mechanism

Abstract

This utility model belongs to the technical field of smelting equipment, specifically relating to a mud-removing mechanism, including a cylinder liner, a hydraulic cylinder, a barrel, and a nozzle. This utility model features a mud plug sleeve and a mud scraper ring. The mud plug sleeve is fixed to the hydraulic cylinder and scrapes away the adhering mud from the inner wall of the mud cavity during the return stroke of the mud plug. The mud scraper ring is fixed inside the cylinder liner, supporting the hydraulic cylinder and scraping away the adhering mud from the inner wall of the hydraulic cylinder during the return stroke of the mud plug. This utility model uses two mud scraping devices to separately scrape the mud from the inner wall of the mud cavity and the outer wall of the hydraulic cylinder, improving the mud scraping efficiency. The mud scraper ring of this utility model is embedded with a self-lubricating copper sleeve to support the hydraulic cylinder and is further fixed by a fixing ring, which improves the working stability of the mud scraper ring and the hydraulic cylinder, preventing radial floating of the hydraulic cylinder while avoiding excessive conformal machining of the hydraulic cylinder.

Description

Technical Field

[0001] This utility model belongs to the field of smelting equipment technology, specifically relating to a mud-removing mechanism. Background Technology

[0002] With the development of blast furnace smelting technology, the process requirements, usage conditions, operating conditions of hydraulic mud guns in front of the furnace, as well as the development of related raw materials such as gun mud, have led to certain changes in the operating conditions of the mud gun mud-making mechanism.

[0003] Currently, with the increased frequency of use, changes in the state of the mud gun, and the increase in process parameters in the operating conditions of the furnace front mud gun equipment, the operation of the mud gun mud-making mechanism has also been subject to higher requirements due to the adjustment of comprehensive factors.

[0004] When the mud-removing mechanism is working, the mud-removing cylinder drives the mud-removing plug to move forward, pushing the blasting mud in the mud cylinder into the taphole channel through the action of the mud-removing plug. The mud-removing plug and the mud cylinder have a certain cooperation relationship. While completing the mud-removing work, it also has a certain sealing effect on the blasting mud in the mud cylinder, preventing the blasting mud in the mud cylinder from flowing back into the rear drive cavity through the gap between the mud cylinder and the mud-removing plug under the action of extrusion pressure. When the amount of back mud accumulates to a certain extent, it will affect the working state of the mud-removing cylinder during continuous operation of the mud-removing mechanism, causing abnormal damage to the mud-removing cylinder, mud-removing plug and other related components.

[0005] To address this issue, existing mud-removing mechanisms rely on two methods to remove waste mud. One method involves installing a mud scraper ring (with a small-angle cutting edge) on the cylinder liner. However, the mud scraper ring provides limited support to the mud-removing cylinder. When factors such as the hardness of the tapping mud or the assembly clearance of the mud plug ring change, the force exerted by the mud plug ring in the mud plug at the front end of the mud-removing cylinder increases significantly. This can easily lead to excessive mud return, deformation of the mud plug pressure plate, or other failures, ultimately resulting in unstable operation of the mud-removing mechanism or its inability to continue operation.

[0006] Another option is to install mudguard rings (with large-angle cutting edges) on the cylinder liner. Although this can overcome the problem of supporting the hydraulic cylinder, the installation structure of the mudguard ring and the drive cavity requires the drive cavity to be locally irregular. Therefore, the drive cavity needs to be made of castings, which has a long manufacturing cycle and is prone to blank defects. Utility Model Content

[0007] In view of this, the present invention provides a mud-removing mechanism, comprising a mud plug sleeve and a mud scraper ring. The mud plug sleeve is fixed to the hydraulic cylinder and scrapes off the adhering mud from the inner wall of the mud cavity during the return stroke of the mud plug. The mud scraper ring is fixed inside the cylinder sleeve, supports the hydraulic cylinder, and scrapes off the adhering mud from the inner wall of the hydraulic cylinder during the return stroke of the mud plug. The present invention employs two mud scraping devices to scrape off the mud from the inner wall of the mud cavity and the outer wall of the hydraulic cylinder respectively, improving the mud scraping efficiency. The mud scraper ring of the present invention is embedded with a self-lubricating copper sleeve to support the hydraulic cylinder, and is further fixed by a fixing ring, which improves the working stability of the mud scraper ring and the hydraulic cylinder, avoids radial floating of the hydraulic cylinder, and avoids excessive conformal machining of the hydraulic cylinder.

[0008] To achieve the above-mentioned technical objectives, the specific technical solution adopted by this utility model is as follows:

[0009] A mud-beating mechanism for sealing the discharge port based on tapping mud, characterized in that it comprises:

[0010] Cylinder liner;

[0011] The hydraulic cylinder, at least a portion of which is fitted inside the cylinder liner, is capable of sliding linearly along the axial direction of the cylinder liner.

[0012] The gun barrel is coaxially fixed at one end to the cylinder liner and is provided with a gun mud cavity;

[0013] The nozzle has one end fixed to the end of the gun body away from the cylinder liner, and the other end is used to discharge gun mud.

[0014] When the hydraulic cylinder extends from the cylinder liner, its front end enters the clay chamber, and the clay is pushed out of the nozzle by the clay plug; the clay-removing mechanism also includes:

[0015] A mud plug sleeve is fitted onto the cylinder at the end of the mud plug away from the nozzle, and scrapes away the adhering mud from the inner wall of the mud cavity during the return stroke of the mud plug.

[0016] A mud scraper ring is fitted onto the end of the cylinder liner and scrapes away the adhering mud from the outer wall of the cylinder during the return stroke of the mud plug. The mud scraper ring also includes a self-lubricating copper sleeve. The self-lubricating copper sleeve is fitted onto the inner ring of the mud scraper ring body and is interference-fitted with the mud scraper ring body to provide support for the cylinder from the outer wall of the cylinder.

[0017] A retaining ring is fitted onto the end of the cylinder liner to further secure the sludge scraper ring.

[0018] Furthermore, in order to make the mud plug sleeve more stable, save installation space, and increase the overall installation strength, at least a portion of the end of the cylinder is fitted to the inner side of the mud plug sleeve.

[0019] The mud plug sleeve includes a fixed part, a transition part, and a first mud scraper blade, all of which are connected in sequence in an annular shape.

[0020] The fixing part is disposed between the mud plug and the end of the oil cylinder, with its inner side fitting against the end of the oil cylinder and its outer side fitting against the mud plug, thereby supporting the mud plug ring to be fixed on the oil cylinder.

[0021] The inner side of the adapter is fitted to the end of the hydraulic cylinder;

[0022] In the cross-section of the mud plug sleeve, there is an angle between the transition portion and the fixed portion, and there is an angle between the first mud scraper blade and the transition portion;

[0023] The first scraper blade is a blade-shaped blade with a certain angle to the axial direction of the oil cylinder; the blade edge of the first scraper blade is at the end away from the transition part and is in clearance fit with the inner wall of the mud cavity.

[0024] Furthermore, in order to further enhance the overall installation strength, reduce the installation difficulty, and save installation space, the bolt passes through the mud plug and the fixed part and connects to the end of the oil cylinder, thereby fixing the mud plug ring to the mud plug on the oil cylinder.

[0025] Furthermore, in order to enhance the sealing performance based on the installation of a mud plug ring without using unnecessary structures, the angled portion between the adapter and the scraper ring is used to fit the mud plug ring; the mud plug ring seals the blasting mud cavity.

[0026] Furthermore, in order to achieve the phased scraping of mud leaking from the cylinder body and thus improve the mud scraping efficiency, the mud scraping ring is provided with a second mud scraping blade with at least two layers of cutting edges on the side away from the cylinder liner; the different cutting edges of the second mud scraping blade are fitted with the outer wall of the oil cylinder based on different clearance amounts.

[0027] Furthermore, in order to further improve the mud scraping efficiency, the cutting edges of the second mud scraping blade are configured such that the gap between the cutting edge near the end of the cannon body and the oil cylinder is greater than that between the cutting edge away from the end of the cannon body.

[0028] Furthermore, in order to improve the rationality of the installation and to reasonably set the mud leakage hole, a mud leakage hole is provided on the cylinder liner near the gun body. The mud leakage hole facilitates the discharge of the attached gun mud scraped off by the mud plug sleeve and the mud scraper ring.

[0029] Furthermore, in order to improve the discharge efficiency of waste sludge, an inclined ring is provided on the fixed ring; the inclined ring has an angle greater than 90° with the blade arm of the second scraper, guiding the scraped sludge to be discharged through the sludge leakage hole.

[0030] Furthermore, in order to improve the overall structural rationality, enhance the fixing strength of the mud scraper ring, and avoid excessive machining of the cylinder liner, the mud scraper ring includes an annular mounting lug, which is fixed to the end of the oil cylinder; after the cylinder liner is connected to the barrel, the barrel acts on the fixing ring, and the fixing ring acts on the mounting lug, thereby achieving secondary fixing of the mud scraper ring.

[0031] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0032] This utility model adopts a reasonable layout, which improves the efficiency of scraping waste sludge while avoiding structural or strength losses to the cylinder liner, barrel, and hydraulic cylinder, thus greatly reducing the maintenance cost and difficulty of the sludge removal mechanism. The parts of the mud plug sleeve, scraper ring, and fixing ring of this utility model are easy to manufacture, have good installation and adjustment capabilities, a simple structure, and are easy to install. The specific advantages of this utility model include:

[0033] The mud plug sleeve and mud scraper ring of this utility model adopt a reasonable structural layout and are fixed according to the shape. While ensuring strength, ease of installation and minimum installation space, they respectively realize the mud scraping function of the mud cavity and the oil cylinder.

[0034] The scraper ring of this utility model adopts a double-bladed structure with different gaps, which can enhance the scraping efficiency. It is equipped with a self-lubricating copper sleeve to support the oil cylinder. Therefore, the body can be made of high-strength material. While ensuring the scraping efficiency and its own strength, it can improve durability and reduce the maintenance cost of the scraper ring itself.

[0035] This utility model uses a fixing ring to perform secondary reinforcement on the scraper ring, which further improves the installation stability of the scraper ring and reduces the processing requirements of the cylinder liner components.

[0036] The new invention allows for the direct fitting of mud plug rings at the corners of the sleeving, thus improving space utilization and enhancing the sealing effect at the cylinder end without requiring a separate mounting groove for the mud plug rings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of a mud-beating mechanism in a specific embodiment of this utility model;

[0039] Figure 2 A schematic diagram of the mud plug sleeve;

[0040] Figure 3 This is a schematic diagram of the sludge scraper ring.

[0041] Figure 4 This is a schematic diagram of the fixed ring structure;

[0042] Figure 5 A schematic diagram of the mud plug sleeve installation method;

[0043] Figure 6 This is a schematic diagram showing the installation method of the scraper ring and the fixing ring;

[0044] Figure 7 This is a schematic diagram of the structure of Comparative Example 1;

[0045] Figure 8 This is a schematic diagram of the structure of Comparative Example 2;

[0046] The components are: 1. Cylinder liner; 2. Oil cylinder; 3. Gun barrel; 31. Mud cavity; 4. Nozzle; 5. Mud plug sleeve; 51. Fixing part; 52. Adapter part; 53. First mud scraper; 6. Mud scraper ring; 61. Mounting lug; 62. Second mud scraper; 63. Self-lubricating copper sleeve; 7. Fixing ring; 8. Mud plug; 9. Mud plug ring. Detailed Implementation

[0047] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0048] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0049] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0050] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The illustrations only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0051] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0052] In one embodiment of this utility model, a mud-beating mechanism is proposed for sealing the discharge port based on the blasting mud, such as... Figure 1 As shown, it includes:

[0053] Cylinder liner 1;

[0054] The hydraulic cylinder 2 is at least partially fitted inside the cylinder liner 1 and can slide linearly along the axial direction of the cylinder liner 1.

[0055] The gun barrel 3 is coaxially fixed at one end to the cylinder liner 1 and is provided with a gun mud cavity 31.

[0056] The nozzle 4 is fixed at one end to the end of the gun body 3 away from the cylinder liner 1, and the other end is used to discharge the gun mud.

[0057] When the hydraulic cylinder 2 extends out of the cylinder liner 1, its front end enters the gunning mud cavity 31, and the gunning mud is pushed out of the nozzle 4 by the mud plug 8; the mud-removing mechanism also includes:

[0058] Mud plug sleeve 5 is fitted onto the oil cylinder 2. Mud plug 8 is located at the end away from the nozzle 4. During the return stroke of mud plug 8, it scrapes off the attached mud from the inner wall of the mud cavity 31.

[0059] The mud scraper ring 6 is fitted on the end of the cylinder liner 1 and scrapes off the adhering mud on the outer wall of the oil cylinder 2 during the return stroke of the mud plug 8. The mud scraper ring 6 also includes a self-lubricating copper sleeve 63. The self-lubricating copper sleeve 63 is fitted on the inner ring of the body of the mud scraper ring 6 and is interference-fitted with the body of the mud scraper ring 6 to provide support for the oil cylinder 2 from the outer wall of the oil cylinder 2.

[0060] The retaining ring 7 is fitted onto the end of the cylinder liner 1 to fix the mud scraper ring 6 for a secondary purpose.

[0061] In this embodiment, both the mud plug sleeve 5 and the retaining ring 7 are machined from steel plates.

[0062] This embodiment simultaneously includes a mud plug sleeve 5 and a mud scraper ring 6. The mud plug sleeve 5 is fixed to the hydraulic cylinder 2 and scrapes off the adhering mud from the inner wall of the mud cavity 31 during the return stroke of the mud plug 8. The mud scraper ring 6 is fixed inside the cylinder sleeve 1, supporting the hydraulic cylinder 2 and scraping off the adhering mud from the inner wall of the hydraulic cylinder 2 during the return stroke of the mud plug 8. This embodiment uses two mud scraping devices to scrape off the mud from the inner wall of the mud cavity 31 and the outer wall of the hydraulic cylinder 2 respectively, improving the mud scraping efficiency without increasing the overall volume. In this embodiment, the mud scraper ring 6 is fitted with a self-lubricating copper sleeve 63 to support the hydraulic cylinder 2, and the mud scraper ring 6 is further fixed based on the fixing ring 7, which can improve the working stability of the mud scraper ring 6 and the hydraulic cylinder 2, avoid radial floating of the hydraulic cylinder 2, and avoid excessive conformal machining of the hydraulic cylinder 2. The absence of a cylinder sleeve 1 eliminates the need for casting to achieve the desired shape.

[0063] In this embodiment, to make the mud plug sleeve 5 more stable, save installation space, and increase overall installation strength, such as Figure 5 As shown, at least a portion of the end of the hydraulic cylinder 2 is fitted against the inner side of the mud plug sleeve 5;

[0064] The mud plug sleeve 5 includes a fixed part 51, a connecting part 52, and a first mud scraper blade 53, all of which are connected in sequence in an annular shape.

[0065] The fixing part 51 is set between the mud plug 8 and the end of the oil cylinder 2, with the inner side fitting against the end of the oil cylinder 2 and the outer side fitting against the mud plug 8, supporting the mud plug ring 9 to be fixed on the oil cylinder 2.

[0066] The inner side of the adapter 52 is fitted to the end of the hydraulic cylinder 2;

[0067] like Figure 2 , 5 As shown, in the cross-section of the mud plug sleeve 5, there is an angle between the transition part 52 and the fixed part 51, and there is an angle between the first mud scraper blade 53 and the transition part 52.

[0068] The first scraper blade 53 is a blade with a certain angle to the axis of the oil cylinder 2; the blade of the first scraper blade 53 is the end away from the transition part 52, and it is in clearance fit with the inner wall of the clay cavity 31.

[0069] like Figure 5 As shown, the first scraper blade 53 in this embodiment has a certain thickness and inclination angle, and the tip of the blade has an appropriate clearance fit with the inner hole of the mud cylinder, which facilitates the cleaning of the back mud on the cylinder liner 1 side when the mud-removing cylinder 2 is retracting, and allows it to smoothly leak out through the mud-leaking hole provided on the cylinder liner 1. In this embodiment, in order to further enhance the overall installation strength, reduce the installation difficulty, and save installation space, the bolt passes through the mud plug 8 and the fixing part 51 and connects to the end of the cylinder 2, fixing the mud plug ring 9 to the mud plug 8 on the cylinder 2.

[0070] In this embodiment, in order to enhance the sealing performance by installing the mud plug ring 9 without using redundant structures, such as... Figure 5 As shown, the angled portion between the adapter 52 and the scraper ring 6 is used to fit the mud plug ring 9; the mud plug ring 9 seals the mud cavity 31.

[0071] This embodiment uses two mud plug rings 9, which are cast bronze parts. The mud plug rings 9 serve to support the front end and seal the gunning mud. The structure of the mud plug sleeve 5 in this embodiment is as follows: Figure 2 , Figure 2 Two mud plug rings 9 are installed on the left end of the middle mud plug sleeve 5. The two mud plug rings 9 are expansion ring structures.

[0072] In this embodiment, in order to achieve the batch scraping of mud leaking on the cylinder body and thus improve the mud scraping efficiency, the mud scraping ring 6 is provided with a second mud scraping blade 62 with at least two layers of cutting edges on the side away from the cylinder liner 1; the different cutting edges of the second mud scraping blade 62 are fitted with the outer wall of the oil cylinder 2 with different clearance amounts.

[0073] In some embodiments, in order to further improve the mud scraping efficiency, the cutting edges of the second mud scraping blade 62 are configured such that the gap between the cutting edge near the end of the barrel 3 and the oil cylinder 2 is greater than that between the cutting edge away from the end of the barrel 3.

[0074] In this embodiment, the scraper ring 6 is an assembly consisting of a body and a self-lubricating copper sleeve 63. The body and the self-lubricating copper sleeve 63 are interference-fitted. The scraper ring 6 is fixedly connected to the drive cavity by bolts passing through the fixing lugs. The overall structure is as follows: Figure 3 As shown, the main body can be made of steel / iron. One end is preferably a double-bladed structure, forming different clearances with the cylinder body of the mud-removing cylinder 2 (larger clearance at the front end, smaller clearance at the rear end). This allows the cylinder 2 to perform graded cleaning of the mud flowing into the side of the barrel 3 during retraction, improving the efficiency and effectiveness of mud removal. A self-lubricating copper sleeve 63 is installed on the inner side of the mud-scraping ring 6. The self-lubricating copper sleeve 63 has a small clearance fit with the outer wall of the cylinder 2 and a certain fit length, so as to better support the cylinder 2 during operation. When the self-lubricating copper sleeve 63 wears to a certain extent, it can be replaced.

[0075] In some embodiments, in order to improve the rationality of installation and to reasonably set the mud leakage hole, a mud leakage hole is provided on the cylinder liner 1 near the barrel 3. The mud leakage hole facilitates the discharge of the attached barrel mud scraped off by the mud plug sleeve 5 and the mud scraper ring 6.

[0076] In this embodiment, in order to improve the discharge efficiency of waste sludge, an inclined ring is provided on the fixed ring 7; the inclined ring and the blade arm of the second scraper 62 have an angle greater than 90°, and guide the scraped sludge of the scraper ring 6 to be discharged into the sludge leakage hole.

[0077] See Figure 6 In this embodiment, the fixing ring 7 is mounted in the gun body 3 by axial and radial limiting clamps. The structure of the fixing ring 7 is as follows: Figure 4 As shown, the fixed ring 7 has an L-shaped cross-section and a certain thickness; as Figure 6 The fixed ring 7 shown contacts the gun body 3 and cylinder liner 1 respectively based on two planes. Based on an end corner ring, it contacts and presses against the mud scraper ring 6. After the assembly is complete, there is an angle between the surface of the corner ring away from the mud scraper ring 6 and the plane of the mud scraper ring 6 that contacts the corner ring. The angle is not less than 90°. This structure facilitates the smooth introduction of the waste mud cleaned by the mud scraper ring 6 into the mud leakage hole, which is convenient for the waste mud to be discharged.

[0078] In this embodiment, in order to improve the overall structural rationality, enhance the fixing strength of the mud scraper ring 6, and avoid excessive processing of the cylinder liner 1, the mud scraper ring 6 includes an annular mounting ear 61, which is fixed to the end of the oil cylinder 2; the fixing ring 7 is installed between the gun body 3 and the cylinder liner 1; after the cylinder liner 1 is connected to the gun body 3, the fixing ring 7 acts on the mounting ear 61 to achieve secondary fixing of the mud scraper ring 6.

[0079] The working principle of the mud-removing mechanism in the above embodiment is as follows: When the hydraulic cylinder 2 moves forward, it drives the mud plug 8, mud plug sleeve 5, and mud plug ring 9 to move forward. Based on the mud plug 8, the mud in the mud cavity 31 is squeezed from the nozzle 4 into the taphole channel. During operation, due to the high pressure of the mud-removing process and the fact that the mud plug 8 and mud plug ring 9 are self-expanding plugs, some mud will enter the mud cavity 31 through the gap between the mud plug 8, mud plug ring 9 and the cylinder body. At the same time, some waste mud may also be attached to the inner wall of the cavity. When the hydraulic cylinder 2 retracts, this waste mud will obstruct the retracting mud plug 8 and the cylinder, forming resistance. In this embodiment, the mud plug sleeve 5 and the mud scraper ring 6 scrape off this waste mud, and through the cooperation of the fixing ring 7, the waste mud has a certain guiding effect, making it easy to discharge the waste mud from the set mud leakage hole during the mud scraping process, ensuring the reliability of the mud-removing mechanism in mud-removing operation. During the extension and retraction of the hydraulic cylinder 2, the self-lubricating copper sleeve 63 nested in the inner ring of the mud scraper ring 6 can also provide good support for the operation of the hydraulic cylinder 2.

[0080] Comparative Example 1:

[0081] like Figure 7 The image shows a prior art mud-removing mechanism that cleans waste mud solely based on a mud-scraping ring. It consists of a mud plug sleeve, front and rear mud plug rings, and a pressure plate. The front and rear mud plug rings are cast copper parts, serving to support the front end and seal the gunning mud. The mud plug is bolted to the mud-removing cylinder. The mud scraper ring is also cast copper, axially positioned by a fixing ring and radially positioned by its interaction with the drive cavity, thus allowing for a certain amount of free play. When the mud-removing cylinder retracts after mud removal, the mud scraper ring cleans the gunning mud that flowed back from the gap between the mud plug and the cylinder during operation (or the gunning mud adhering to the outer cylinder of the mud-removing cylinder during mud removal) using a blade-like structure with a certain thickness and angle at its front end.

[0082] In this comparative example, the supporting effect of the scraper ring on the mud-dissolving cylinder is limited. When factors such as the hardness of the mud used and the assembly clearance of the mud plug ring change, the force of the mud plug ring in the mud plug at the front end of the mud-dissolving cylinder increases significantly, which can easily cause excessive mud return, deformation of the mud plug pressure plate or other failures, ultimately leading to unstable operation of the mud-dissolving mechanism or its inability to continue to be used.

[0083] Comparative Example 2:

[0084] like Figure 8 The image shows a sludge-cleaning mechanism in the prior art that relies solely on a mud-blocking ring for sludge removal. In this structure, the mud plug is a single unit, connected to the sludge-cleaning cylinder by bolts. The mud-blocking ring is made of cast iron and fixedly connected to the drive cavity by bolts, thus providing a fixed connection. In this structure, a certain gap must be maintained between the mud plug and the cylinder to prevent damage to the cylinder during operation. Simultaneously, the mud-blocking ring provides support for the cylinder during its reciprocating motion. When the sludge-cleaning cylinder retracts after sludge removal, the mud-blocking ring cleans the sludge that has flowed back from the gap between the mud plug and cylinder (or the sludge adhering to the outer cylinder of the sludge-cleaning cylinder during the sludge removal process).

[0085] In this comparative example, the installation structure of the mudguard ring and cylinder liner requires the cylinder liner to be locally irregular, so the cylinder liner needs to be made of casting, which has a long manufacturing cycle and is prone to blank defects; the installation support structure of the middle and front ends of the mudguard ring and mud plug is also prone to causing scratches on the mud cavity or the outer circle of the cylinder during the reciprocating operation of the mud-pumping cylinder.

[0086] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A mud striking mechanism for sealing a discharge opening based on a gunite, characterized by, include: Cylinder liner; The hydraulic cylinder, at least a portion of which is fitted inside the cylinder liner, slides linearly along the axial direction of the cylinder liner; The gun barrel is coaxially fixed at one end to the cylinder liner and is provided with a gun mud cavity; The nozzle has one end fixed to the end of the gun body away from the cylinder liner, and the other end is used to discharge gun mud. When the hydraulic cylinder extends from the cylinder liner, its front end enters the clay chamber, and the clay is pushed out of the nozzle by the clay plug; the clay-removing mechanism also includes: A mud plug sleeve is fitted onto the cylinder at the end of the mud plug away from the nozzle, and scrapes away the adhering mud from the mud cavity during the return stroke of the mud plug. A mud scraper ring is fitted onto the end of the cylinder liner and scrapes away the adhering mud from the outer wall of the cylinder during the return stroke of the mud plug. The mud scraper ring also includes a self-lubricating copper sleeve. The self-lubricating copper sleeve is fitted onto the inner ring of the mud scraper ring body and is interference-fitted with the mud scraper ring body to provide support for the cylinder from the outer wall of the cylinder. A retaining ring is fitted onto the end of the cylinder liner to further secure the sludge scraper ring.

2. The mud-beating mechanism according to claim 1, characterized in that, At least a portion of the end of the cylinder is fitted against the inner side of the mud plug sleeve; The mud plug sleeve includes a fixed part, a transition part, and a first mud scraper blade, all of which are connected in sequence in an annular shape. The fixing part is disposed between the mud plug and the end of the oil cylinder, with its inner side fitting against the end of the oil cylinder and its outer side fitting against the mud plug, thereby supporting the mud plug ring to be fixed on the oil cylinder. The inner side of the adapter is fitted to the end of the hydraulic cylinder; In the cross-section of the mud plug sleeve, there is an angle between the transition portion and the fixed portion, and there is an angle between the first mud scraper blade and the transition portion; The first scraper blade is a blade-shaped blade with a certain angle to the axial direction of the oil cylinder; the blade edge of the first scraper blade is at the end away from the transition part and is in clearance fit with the inner wall of the mud cavity.

3. The mud-beating mechanism according to claim 2, characterized in that, After the bolt passes through the mud plug and the fixing part, it connects to the end of the oil cylinder, fixing the mud plug ring to the mud plug on the oil cylinder.

4. The mud-beating mechanism according to claim 2, characterized in that, The angled portion between the adapter and the scraper ring is used to fit the mud plug ring; the mud plug ring seals the blasting mud cavity.

5. The mud-beating mechanism according to claim 1, characterized in that, The scraper ring is provided with a second scraper blade with at least two layers of cutting edges on the side away from the cylinder liner; the different cutting edges of the second scraper blade are fitted with the outer wall of the cylinder with different clearance amounts.

6. The mud-beating mechanism according to claim 5, characterized in that, The cutting edges of the second mud scraper are configured such that the gap between the cutting edge near the end of the cannon body and the oil cylinder is greater than that between the cutting edge away from the end of the cannon body.

7. The mud-beating mechanism according to claim 6, characterized in that, A mud-draining hole is provided on the cylinder liner near the barrel, which facilitates the discharge of the attached gun mud scraped off by the mud plug sleeve and the mud scraper ring.

8. The mud-beating mechanism according to claim 7, characterized in that, An inclined ring is provided on the fixed ring; the inclined ring and the blade arm of the second scraper have an angle greater than 90°, which guides the scraped mud to be discharged from the mud leakage hole.

9. The mud-beating mechanism according to claim 1, characterized in that, The mud scraper ring includes an annular mounting lug, which is fixed to the end of the hydraulic cylinder. After the cylinder liner is connected to the barrel, the barrel acts on the fixing ring, and the fixing ring acts on the mounting lug, thereby achieving secondary fixation of the mud scraper ring.

Images