A horizontal-axis tunneling device and its spray distribution mechanism

Abstract

This invention relates to the field of tunneling equipment technology, specifically to a horizontal axis tunneling machine and its spray distribution mechanism. The spray distribution mechanism of the horizontal axis tunneling machine includes a fixed component and a rotating component. The rotating component includes a fixed seat and an end cap forming a hydraulic chamber. The fixed component includes a connecting shaft extending into the hydraulic chamber through the fixed seat and a distribution plate mounted on the connecting shaft and located within the hydraulic chamber. The fixed seat has a mating surface for contacting the distribution plate. The connecting shaft has a water channel, and the water outlet end of the connecting shaft is located on the side of the distribution plate facing the end cap. The end cap has a rotating mounting hole and an end cap water channel. The water outlet end of the connecting shaft is rotatably mounted in the rotating mounting hole. The end cap water channel connects the water outlet of the connecting shaft and the hydraulic chamber. This design helps ensure the axial position of the connecting shaft, ensures the coaxiality of the rotating and fixed components, and reduces the likelihood of uneven wear between the mating surfaces of the distribution plate and the fixed seat due to installation deviations.

Description

Technical Field

[0001] This invention relates to the field of tunneling equipment technology, specifically to a horizontal axis tunneling device and its spray distribution mechanism. Background Technology

[0002] The directional internal spraying technology of horizontal axis tunneling equipment is achieved through a specially designed fan-shaped spray distribution mechanism. High-pressure water is delivered to this mechanism and then distributed to corresponding nozzles on the cutting head, forming a fan-shaped spray area in front of the cutting head. This spray area does not rotate with the cutting head and maintains a constant fan-shaped spray angle. This spraying method allows for targeted design of the spray area based on the working range of the cutting head, ensuring that areas where dust is generated by the cutting head during the cutting process are promptly and effectively covered by the spray, preventing operators behind the cutting head from being sprayed with water mist.

[0003] Existing spray distribution mechanisms for horizontal axis tunneling equipment, such as the internal spray output system for a horizontal axis tunneling machine disclosed in Chinese invention patent application CN118815495A, include a reducer, a cutting head, a telescopic sleeve assembly, and an internal spray water valve assembly. The internal spray water valve assembly includes a connecting plate and an end cap, which are joined and fixed together. A second cavity is formed between the connecting plate and the end cap. A directional plate is attached to the connecting plate in the second cavity. The connecting plate has multiple third water channels that communicate with the water channels inside the cutting head. The third water channels are arranged in a ring at equal intervals with the directional plate as the center. The directional plate also has an arc-shaped waist-shaped hole. The third water channels communicate with the second cavity through the waist-shaped hole. The water outlet of the telescopic sleeve assembly passes through the connecting plate and the directional plate and communicates with the second cavity. The size of the waist-shaped hole of the directional plate is specifically designed according to the needs of the spray range, and the waist-shaped hole of the directional plate is installed according to the position corresponding to the spray range during installation.

[0004] The aforementioned telescopic sleeve assembly and internal spray valve assembly constitute a spray distribution mechanism. The directional plate constitutes a distribution plate, and the connecting plate constitutes a fixed base with a mating surface that fits tightly against the directional plate. The distribution plate and mating surface have corresponding water passage holes. The second cavity constitutes a water pressure chamber. The water pipe passing through the connecting plate from the telescopic sleeve assembly constitutes a connecting shaft. The distribution plate is mounted on the connecting shaft to prevent rotation. The planetary frame constitutes the main shaft of the cutting mechanism, on which the cutting head is rotatably mounted. Water enters the water channel on the cutting head through the main shaft of the cutting mechanism, the telescopic sleeve assembly, and the internal spray valve assembly, and is then sprayed out. The connecting plate and end cap constitute a rotating assembly mounted on the cutting head and rotating with it. The telescopic sleeve assembly and the directional plate constitute a fixed assembly mounted on the main shaft of the cutting mechanism and not rotating.

[0005] Since the water flows into the water pressure chamber from the outlet port of the connecting shaft of the telescopic sleeve assembly, the outlet end of the connecting shaft is suspended in the water pressure chamber. In this structure, the axial position of the connecting shaft is only guaranteed by the rotational support on the fixed seat. This can easily cause uneven wear between the mating surfaces of the distribution plate and the connecting plate due to installation deviations, and it is also not conducive to reliable force bearing. Summary of the Invention

[0006] The purpose of this invention is to provide a spray distribution mechanism for a horizontal shaft tunneling device, so as to solve the problem that the current spray distribution mechanism, which makes the water outlet end of the connecting shaft extend into the water pressure chamber for water transmission, is prone to uneven wear between the mating surfaces of the distribution plate and the connecting plate due to installation deviation; the purpose of this invention is also to provide a horizontal shaft tunneling device to solve the above problems.

[0007] The technical solution of the spray distribution mechanism of the horizontal axis tunneling equipment of the present invention is as follows:

[0008] A spray distribution mechanism for a horizontal axis tunneling machine includes a fixed assembly for mounting on the main shaft of a cutting mechanism and a rotating assembly for mounting on a cutting head. The rotating assembly includes a fixed seat and an end cap forming a hydraulic chamber. The fixed assembly includes a connecting shaft extending into the hydraulic chamber through the fixed seat and a distribution plate mounted on the connecting shaft and located within the hydraulic chamber. The fixed seat has a mating surface for contacting the distribution plate. The connecting shaft has a water channel, and the water outlet of the connecting shaft is located on the side of the distribution plate facing the end cap. The end cap has a rotating mounting hole and an end cap water channel. The water outlet of the connecting shaft is rotatably mounted in the rotating mounting hole. The end cap water channel connects the water outlet of the connecting shaft and the hydraulic chamber.

[0009] Beneficial effects: This invention improves upon the existing spray distribution mechanism of horizontal axis tunneling equipment. By setting a rotating mounting hole and an end cover water channel on the end cover, the water outlet of the connecting shaft is rotatably supported on the end cover. The water outlet of the connecting shaft is connected to the water pressure chamber through the end cover water channel. Water enters the water channel of the fixed component from the water channel on the main shaft of the cutting mechanism, and then enters the end cover water channel from the water outlet of the connecting shaft. After passing through the end cover water channel, it enters the water pressure chamber and enters the water channel of the rotating component through the water passage holes in the corresponding area of ​​the mating surface of the distribution plate and the fixed seat. Finally, it is sprayed out from the nozzle on the cutting head. The parts of the connecting shaft located on both sides of the axial direction of the distribution plate can be supported on both sides by the fixed seat and the end cover, which helps to ensure the axial position of the connecting shaft, ensure the coaxiality of the rotating component and the fixed component, and prevent uneven wear between the mating surfaces of the distribution plate and the fixed seat due to installation deviation. Moreover, the installation structure is stable, which is conducive to reliable stress and improves service life.

[0010] Furthermore, the end cap channel includes various axial channels distributed circumferentially around the rotating mounting hole, and the extension direction of the axial channels is consistent with the axial direction of the end cap.

[0011] Furthermore, the end cap water channel includes a buffer water cavity, one end of the axial water channel is connected to the buffer water cavity and the other end is connected to the water pressure cavity, the outlet of the water outlet end of the connecting shaft is connected to the buffer water cavity, and the projection of the buffer water cavity on the axial direction of the connecting shaft covers the outlet of the water outlet end and the projection of the axial water channel on the axial direction of the connecting shaft.

[0012] Furthermore, the water channel within the connecting shaft includes a large-hole section and a small-hole section distributed and connected along its axial direction. The inner diameter of the large-hole section is larger than the inner diameter of the small-hole section, and the water outlet of the outlet end is located in the large-hole section.

[0013] Furthermore, the end cap includes an end cap body and an end cap bushing. The end cap body is provided with a bushing mounting hole, and the end cap bushing is installed in the bushing mounting hole. The center hole of the end cap bushing constitutes the aforementioned rotating mounting hole, and the end cap water channel is provided on the end cap body.

[0014] Furthermore, the end cap has a portion that fits into the central hole of the mounting base.

[0015] Furthermore, the side of the inner wall of the water pressure chamber formed by the end cap is provided with a groove, and the rotating mounting hole is located at the bottom of the groove.

[0016] Furthermore, the distribution plate is circumferentially anti-rotating and axially movable on the connecting shaft. A locking nut is threaded onto the connecting shaft on the side of the distribution plate opposite to the mating surface. A spring is provided between the locking nut and the distribution plate, and the spring is used to press the distribution plate.

[0017] Furthermore, the fixed base includes a base and a wear-resistant disc that can be detachably and fixedly installed on the base. The mating surface is located on the wear-resistant disc. The distribution plate includes a contact surface that fits tightly with the mating surface during use. A water distribution groove is provided on the contact surface to supply water from the water distribution groove through the water passage hole in the corresponding area of ​​the mating surface into the rotating assembly.

[0018] The technical solution of the horizontal shaft tunneling equipment of the present invention is as follows:

[0019] A horizontal axis tunneling device includes a cutting mechanism, which comprises a cutting head, a main shaft, and a spray distribution mechanism. The spray distribution mechanism includes a fixed assembly for mounting on the main shaft and a rotating assembly for mounting on the cutting head. The rotating assembly includes a fixed seat and an end cap forming a hydraulic chamber. The fixed assembly includes a connecting shaft extending into the hydraulic chamber through the fixed seat and a distribution plate mounted on the connecting shaft and located within the hydraulic chamber. The fixed seat has a mating surface for contacting the distribution plate. The connecting shaft has a water channel, and the water outlet of the connecting shaft is located on the side of the distribution plate facing the end cap. The end cap has a rotating mounting hole and an end cap water channel. The water outlet of the connecting shaft is rotatably mounted in the rotating mounting hole, and the end cap water channel connects the water outlet of the connecting shaft and the hydraulic chamber.

[0020] Beneficial effects: This invention improves upon the existing spray distribution mechanism of horizontal axis tunneling equipment. By setting a rotating mounting hole and an end cover water channel on the end cover, the water outlet of the connecting shaft is rotatably supported on the end cover. The water outlet of the connecting shaft is connected to the water pressure chamber through the end cover water channel. Water enters the water channel of the fixed component from the water channel on the main shaft of the cutting mechanism, and then enters the end cover water channel from the water outlet of the connecting shaft. After passing through the end cover water channel, it enters the water pressure chamber and enters the water channel of the rotating component through the water passage holes in the corresponding area of ​​the mating surface of the distribution plate and the fixed seat. Finally, it is sprayed out from the nozzle on the cutting head. The parts of the connecting shaft located on both sides of the axial direction of the distribution plate can be supported on both sides by the fixed seat and the end cover, which helps to ensure the axial position of the connecting shaft, ensure the coaxiality of the rotating component and the fixed component, and prevent uneven wear between the mating surfaces of the distribution plate and the fixed seat due to installation deviation. Moreover, the installation structure is stable, which is conducive to reliable stress and improves service life.

[0021] Furthermore, the end cap channel includes various axial channels distributed circumferentially around the rotating mounting hole, and the extension direction of the axial channels is consistent with the axial direction of the end cap.

[0022] Furthermore, the end cap water channel includes a buffer water cavity, one end of the axial water channel is connected to the buffer water cavity and the other end is connected to the water pressure cavity, the outlet of the water outlet end of the connecting shaft is connected to the buffer water cavity, and the projection of the buffer water cavity on the axial direction of the connecting shaft covers the outlet of the water outlet end and the projection of the axial water channel on the axial direction of the connecting shaft.

[0023] Furthermore, the water channel within the connecting shaft includes a large-hole section and a small-hole section distributed and connected along its axial direction. The inner diameter of the large-hole section is larger than the inner diameter of the small-hole section, and the water outlet of the outlet end is located in the large-hole section.

[0024] Furthermore, the end cap includes an end cap body and an end cap bushing. The end cap body is provided with a bushing mounting hole, and the end cap bushing is installed in the bushing mounting hole. The center hole of the end cap bushing constitutes the aforementioned rotating mounting hole, and the end cap water channel is provided on the end cap body.

[0025] Furthermore, the end cap has a portion that fits into the central hole of the mounting base.

[0026] Furthermore, the side of the inner wall of the water pressure chamber formed by the end cap is provided with a groove, and the rotating mounting hole is located at the bottom of the groove.

[0027] Furthermore, the distribution plate is circumferentially anti-rotating and axially movable on the connecting shaft. A locking nut is threaded onto the connecting shaft on the side of the distribution plate opposite to the mating surface. A spring is provided between the locking nut and the distribution plate, and the spring is used to press the distribution plate.

[0028] Furthermore, the fixed base includes a base and a wear-resistant disc that can be detachably and fixedly installed on the base. The mating surface is located on the wear-resistant disc. The distribution plate includes a contact surface that fits tightly with the mating surface during use. A water distribution groove is provided on the contact surface to supply water from the water distribution groove through the water passage hole in the corresponding area of ​​the mating surface into the rotating assembly. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the cutting mechanism of a horizontal shaft tunneling device according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the fan-shaped spray area of ​​the cutting mechanism in the diagram;

[0031] Figure 3 for Figure 1 A partial cross-sectional view of the cutting mechanism in the middle;

[0032] Figure 4 for Figure 3 A partially enlarged view of the spray distribution mechanism installation structure in the image;

[0033] Figure 5 for Figure 3 A schematic diagram of the spray distribution mechanism in the middle;

[0034] Figure 6 for Figure 5 A partial cross-sectional view of the spray distribution mechanism in the image;

[0035] Figure 7 for Figure 6 A schematic diagram of a local structure in the image;

[0036] Figure 8 for Figure 4 A schematic diagram of the end cap waterway in the middle;

[0037] Figure 9 for Figure 7 A schematic diagram of the distribution panel in the circuit;

[0038] Figure 10 for Figure 7 A schematic diagram of the wear-resistant disc in the image;

[0039] Figure 11 for Figure 4 A schematic diagram of the connecting shaft in the diagram;

[0040] Figure 12 for Figure 4 A schematic diagram of the force transmission sleeve in the process.

[0041] In the picture:

[0042] 100. Spray distribution mechanism;

[0043] 200. Cutting head; 201. Nozzle; 202. Cutting head water channel;

[0044] 300. Horizontal shaft reducer; 301. Reducer main shaft; 302. Main shaft water channel;

[0045] 101. Main body; 102. Water inlet head; 103. Inner water jacket;

[0046] 104. Force transmission sleeve; 1041. External hexagonal force transmission sleeve; 1042. Internal hexagonal force transmission sleeve;

[0047] 105. Inner spring; 106. Outer spring;

[0048] 107. Connecting shaft; 1071. External hexagon of connecting shaft; 1072. Spline; 1073. Threaded section;

[0049] 108. Distribution plate; 1081. Water distribution trough; 1082. Water passage hole of distribution plate; 1083. Pressure guiding and unloading groove; 1084. Anti-rotation mounting hole; 1085. Dirt collection and flushing groove; 1086. Outer edge recess; 1087. Inner edge recess;

[0050] 109. Locking nut; 1010. Compression spring; 1011. Water jacket sealing ring;

[0051] 111. Wear-resistant disc; 1110. Wear-resistant disc water passage; 112. Flow distribution seat; 1121. Flow distribution seat water channel; 113. Flange seat; 114. Rotary sealing bushing;

[0052] 115. End cap; 1151. Axial water channel; 1152. Buffer water cavity; 116. End cap bushing. Detailed Implementation

[0053] The basic concept of the spray distribution mechanism of the horizontal shaft tunneling equipment of the present invention is to use the fixed seat and end cover to form support on both sides of the connecting shaft, and to use the end cover water channel to realize the connection between the connecting shaft water channel and the water pressure chamber, so as to ensure the coaxiality of the rotating component and the fixed component, the uneven wear between the distribution plate and the mating surface, and the stable structure and reliable force.

[0054] The technical solution of the present invention will be specifically described below with reference to the embodiments.

[0055] Embodiments of the horizontal shaft tunneling equipment of the present invention:

[0056] To facilitate understanding of the present invention, this embodiment first introduces the main structure of the horizontal shaft tunneling equipment and the structure involved in the spraying process.

[0057] Horizontal tunneling equipment includes a cutting mechanism, such as... Figure 1 , Figure 2 , Figure 3As shown, the cutting mechanism includes a cutting head 200, a horizontal shaft reducer 300, and a spray distribution mechanism 100. The horizontal shaft reducer 300 supports and drives the cutting head 200 to rotate. The reducer spindle 301 of the horizontal shaft reducer 300 is connected to the spray distribution mechanism 100. The cutting head 200 can rotate relative to the reducer spindle 301, which is also the main shaft of the cutting mechanism. The cutting head 200 is equipped with a nozzle 201 and has a cutting head water channel 202 inside. The cutting head water channel 202 is connected to the nozzle 201 and to the water channel inside the spray distribution mechanism 100. Two cutting heads 200 are installed on the output ends of both sides of the horizontal shaft reducer 300. The spray distribution mechanism 100 is installed at the end of the cutting head 200. The horizontal shaft reducer 300 has a symmetrical structure on both sides. The spray distribution mechanism 100 includes a rotating component for mounting to the cutting head 200 and a fixing component for mounting to the reducer main shaft 301. The fixing component is fixed to the reducer main shaft 301 by bolts, and the rotating component is fixed to the cutting head 200 by bolts. After the spray distribution mechanism 100 is fixed, the inlet of the water channel inside the spray distribution mechanism 100 is connected to the main shaft water channel 302 of the reducer main shaft 301, and the outlet of the water channel inside the spray distribution mechanism 100 is connected to the cutting head water channel 202. The number of outlets is the same as the number of cutting head water channels 202. The cutting head water channels 202 are connected to the nozzles 201, forming the basic water passage of the cutting mechanism of the horizontal axis tunneling equipment.

[0058] Combination Figure 4 , Figure 5 , Figure 6 , Figure 7 The fixing components of the spray distribution mechanism 100 include a water inlet seat, an inner water jacket 103, a force transmission sleeve 104, an inner spring 105, an outer spring 106, a connecting shaft 107, a distribution plate 108, and corresponding seals. The water inlet seat includes a main body seat 101 and a water inlet head 102. The main body seat 101 is fixedly mounted on the reducer main shaft 301. The inner water jacket 103 and the force transmission sleeve 104 are sequentially mounted on the water inlet seat. A seal is provided between the inner water jacket 103 and the water inlet seat. A spring is installed between the force transmission sleeve 104 and the water inlet seat. The fixing components of the spray distribution mechanism 100 do not rotate with the cutting head 200. The connecting shaft 107 and the distribution plate 108 are connected by a spline. The water inlet seat, the force transmission sleeve 104, and the connecting shaft 107 transmit torque through a hexahedral structure.

[0059] The rotating component of the spray distribution mechanism 100 rotates with the cutting head 200. The rotating component includes a distribution seat 112, a wear-resistant disc 111, a flange seat 113, an end cover 115, an end cover bushing 116, a rotary sealing bushing 114, and corresponding sealing elements. The wear-resistant disc 111 is fixed to the distribution seat 112, the flange seat 113 is fixedly connected to the distribution seat 112, and the end cover 115 is fixedly connected to the flange seat 113. The water passages evenly distributed on the wear-resistant disc 111 are connected one-to-one with the distribution seat water channels 1121 on the distribution seat 112. The distribution seat 112 is fixed to the cutting head 200 by bolts, and the distribution seat water channels 1121 evenly distributed on the circumference of the distribution seat 112 are connected to the cutting head water channels 202.

[0060] The cutting head 200 is fixedly connected to the housing of the horizontal shaft reducer 300. The housing of the horizontal shaft reducer 300 drives the cutting head 200 to rotate, and the cutting head 200 drives the rotating component of the spray distribution mechanism 100 to rotate. The main shaft 301 of the reducer is fixedly connected to the fixed component of the spray distribution mechanism 100 by bolts and does not rotate with the cutting head 200. There is a relative rotational relationship between the distribution plate 108 and the wear-resistant plate 111, and the two form an end face seal. There is a relative rotational relationship between the connecting shaft 107 and the rotary sealing bushing 114, and a rotary seal is provided between the two. High-pressure water passes through the inlet head 102, the inner water jacket 103, the connecting shaft 107, the end cover 115, the distribution plate 108, the wear-resistant plate 111, the distribution seat 112, and the cutting head 200 in sequence, and then water mist is sprayed out from the nozzles 201 arranged on the cutting head 200. Due to the arc-shaped water channel structure on the distribution plate 108, the water passages on the wear-resistant plate 111 connect and disconnect during relative rotation with the distribution plate 108. This allows the nozzles 201 on the cutting head 200 to connect and disconnect during the spraying process as the cutting head 200 rotates one revolution. Consequently, the spray direction of the cutting head 200 remains forward during rotation, presenting a fan-shaped spray pattern. Figure 2 The fan-shaped spray area A in the middle.

[0061] The fixed component of the spray distribution mechanism 100 is equipped with a floating connection structure to accommodate the positional offset of the cutting head relative to the reducer main shaft 301. The floating connection structure is achieved through the floating connection of the inner water jacket 103 and the force transmission sleeve 104 to the water inlet seat and the connecting shaft 107, respectively. The connecting shaft 107 passes through the rotating component and forms a rotary seal engagement with the rotary sealing bushing 114 and the distribution seat 112. The distribution plate 108 is connected to the connecting shaft 107. The inner water jacket 103 is installed inside the force transmission sleeve 104. The two ends of the inner water jacket 103 and the force transmission sleeve 104 are respectively engaged with the connecting shaft 107 and the water inlet seat, and can float axially and radially. The two ends of the force transmission sleeve 104 are engaged with the connecting shaft 107 and the water inlet seat to prevent rotation. The two ends of the inner water jacket 103 are engaged with the connecting shaft 107 and the water inlet seat to seal and can rotate relative to each other. The center holes of the inner water jacket 103, the water inlet seat, and the connecting shaft 107 are engaged to form a water supply channel for water to flow to the distribution plate 108. When the wear-resistant plate 111, which is a mating plate, rotates relative to the distribution plate 108 and rubs, the force transmission sleeve 104 bears torque, while the inner water jacket 103 does not bear torque.

[0062] The force transmission sleeve 104 is fitted outside the inner water sleeve 103. The two ends of the inner water sleeve 103 are sealed with the water inlet head 102 of the water inlet seat and the connecting shaft 107 through the water sleeve sealing ring 1011. Since the two ends of the inner water sleeve 103 are sealed, the water supply channel to the distribution plate 108 can be formed by the cooperation of the center hole of the inner water sleeve 103, the water inlet seat and the connecting shaft 107.

[0063] During operation, the wear-resistant disc 111 rotates while the distribution disc 108 remains stationary. The wear-resistant disc 111 and the distribution disc 108 are in contact and rub against each other. The torque received by the distribution disc 108 can be transmitted to the force transmission sleeve 104 via the connecting shaft 107. Due to the anti-rotation fit at both ends of the force transmission sleeve 104, the torque is transmitted to the fixed water inlet seat through the force transmission sleeve 104. Meanwhile, the inner water sleeve 103 is rotatably fitted at both ends, and the connecting shaft 107 does not transmit torque to the inner water sleeve 103. The inner water sleeve 103 will not undergo torsional deformation due to torque, and this will not affect the sealing fit formed by the sealing rings installed at both ends of the inner water sleeve 103. This helps to ensure reliable sealing fit, reduces the likelihood of sealing failure, and improves the sealing reliability of the spray distribution mechanism 100. Moreover, the inner water sleeve 103 does not bear torsional torque, which simplifies the stress on the sealing rings at both ends of the inner water sleeve 103. The sealing rings are less prone to damage, which helps to improve service life and ensure reliable sealing.

[0064] The distribution seat 112, rotary sealing bushing 114, wear-resistant disc 111, and flange seat 113 all have axially penetrating central holes. With the side containing the end cap 115 as the axially outer side, the rotary sealing bushing 114 is bolted to the inner side of the distribution seat 112, the wear-resistant disc 111 and flange seat 113 are fixed to the outer side of the distribution seat 112, and the end cap 115 is fixed to the outer opening of the flange seat 113. A seal is provided at the mating surface between the flange seat 113 and the distribution seat 112, and a seal is provided at the circumferential surface mating point between the end cap 115 and the flange seat 113. The connecting shaft 107 is adapted to pass through the central holes of the rotary sealing bushing 114 and the distribution seat 112, and both the rotary sealing bushing 114 and the central holes of the distribution seat 112 form a seal with the outer circumferential surface of the connecting shaft 107. The outlet of the distribution seat water channel 1121 constitutes the outlet of the internal water channel of the spray distribution mechanism 100.

[0065] The main body 101 is sealed to the main shaft 301 of the reducer. The main body 101 has an axially through central hole. The main body 101 has a part that extends into the main shaft water channel 302 of the main shaft 301 of the reducer and the part is internally threaded to the water inlet head 102. The water inlet head 102 is sealed to the main body 101. The water inlet head 102 has a through central hole. The central hole of the water inlet head 102 is a stepped hole. One end of the hole forms the water inlet of the internal water channel of the spray distribution mechanism 100, and the other end of the hole is for one end of the inner water jacket 103 to be fitted and inserted. The main body 101 has a portion that axially protrudes from the end face of the reducer main shaft 301, and one end of the force transmission sleeve 104 is inserted into this portion. The other end of the force transmission sleeve 104 is fitted onto the connecting shaft 107. The length of the inner water sleeve 103 is greater than the length of the force transmission sleeve 104. One end of the inner water sleeve 103 is inserted into the connecting shaft 107, and the other end is inserted into the water inlet seat. By utilizing the inner surface and outer surface of the connecting shaft 107 for the inner water sleeve 103 and the force transmission sleeve 104 to fit together, the length of the connecting shaft 107 can be shortened, the size reduced, space saved, and the use reliable.

[0066] The outer portion of the central hole of the main body 101 has a larger radial dimension and forms an anti-rotation fitting hole. The inner end of the force transmission sleeve 104 has an anti-rotation structure to form an anti-rotation fit after it is fitted into the anti-rotation fitting hole of the main body 101. The inner end of the connecting shaft 107 has an anti-rotation structure, and the outer end of the force transmission sleeve 104 has an anti-rotation fitting hole to form an anti-rotation fit after the outer end of the force transmission sleeve 104 is fitted onto the inner end of the connecting shaft 107. The inner end of the connecting shaft 107 has a shoulder, which is axially spaced from the inner end face. An anti-rotation structure is provided on the shoulder. The outer end of the central hole of the force transmission sleeve 104 has a stepped hole structure with a stepped surface opposite to the shoulder, which can form a limiting position. The connecting shaft 107 has a circular center hole, and the inner end of the center hole is a stepped hole. The outer end of the inner water jacket 103 is inserted into the center hole of the connecting shaft 107, and its outer end face is axially opposite to the stepped surface of the stepped hole. A water jacket sealing ring 1011 is installed on the outer end of the inner water jacket 103. The outer circumferential surface of the outer end of the inner water jacket 103 and the inner circumferential surface of the center hole of the connecting shaft 107 are sealed by the water jacket sealing ring 1011. The inner part of the center hole of the main body 101 has a smaller radial dimension and is threaded to the inlet head 102. The inner diameter of the inner end of the center hole of the inlet head 102 is smaller than the inner diameter of the outer end. The inner end of the inner water jacket 103 is inserted into the outer end of the center hole of the inlet head 102. A water jacket sealing ring 1011 is installed on the inner end of the inner water jacket 103. The outer circumferential surface of the inner end of the inner water jacket 103 and the inner circumferential surface of the center hole of the inlet head 102 are sealed by the water jacket sealing ring 1011.

[0067] An outer spring 106 is fitted onto the force transmission sleeve 104. One end of the outer spring 106 abuts against the outer end of the force transmission sleeve 104 that is fitted onto the connecting shaft 107, and the other end abuts against the outer end of the main body seat 101 of the water inlet seat. The outer end of the force transmission sleeve 104 has a retaining edge for the outer spring 106 to press against, and the outer end of the main body seat 101 has a stepped surface for the outer spring 106 to press against. In the extension or compression direction of the outer spring 106, the inner end of the force transmission sleeve 104 can move inside the main body seat 101. Under the compression force of the outer spring 106, the inner stepped surface of the outer end of the force transmission sleeve 104 can be engaged with the shoulder of the outer end of the connecting shaft 107, so that the force transmission sleeve 104 and the connecting shaft 107 are in stable contact, forming a firm transmission engagement.

[0068] An inner spring 105 is installed between the inner water jacket 103 and the inlet head 102. The inner spring 105 is located in the center hole of the inlet head 102, with one end pressing against the stepped surface inside the inlet head 102 and the other end pressing against the end face of the inner water jacket 103. The inner spring 105 is arranged axially along the inner water jacket 103 to apply a force to the inner water jacket 103 toward the side where the connecting shaft 107 is located. This allows the outer end of the inner water jacket 103 to press against the inner step at the inner end of the connecting shaft 107, which is beneficial to the stability of the inner water jacket 103.

[0069] The outer diameter of the portion of the inner water jacket 103 where the water jacket sealing rings 1011 are installed at both ends is larger than the outer diameter of the main body portion between the two ends. The outer circumferential surface of the inner water jacket 103 is spaced apart from the inner circumferential surface of the force transmission sleeve 104. There is an annular space between the inner water jacket 103 and the force transmission sleeve 104, which can reduce the influence of the force transmission sleeve 104 on the inner water jacket 103. The inner water jacket 103 and the force transmission sleeve 104 can float independently, which is beneficial to improving reliability.

[0070] The water inlet base includes a main body 101 and a water inlet head 102 threadedly connected to the main body 101. The central hole of the water inlet head 102 is a circular hole structure and forms a water channel for the water inlet head 102. The corresponding end of the inner water jacket 103 is inserted into the water inlet head 102. After the water inlet head 102 is worn, it can be replaced separately, saving costs.

[0071] Combination Figure 11 , Figure 12 The anti-rotation structure at the inner end of the force transmission sleeve 104 is an outer hexagonal 1041, and the anti-rotation mating hole at the outer end of the force transmission sleeve 104 is an inner hexagonal 1042. Correspondingly, the main body seat 101 is provided with an inner hexagonal structure, and the connecting shaft 107 is provided with an outer hexagonal structure, namely, the connecting shaft outer hexagonal 1071. The force transmission sleeve 104 forms an anti-rotation mechanism with the main body seat 101 through the outer hexagonal structure, and the force transmission sleeve 104 forms an anti-rotation mechanism with the outer hexagonal structure of the connecting shaft 107 through the inner hexagonal structure.

[0072] The following is combined Figure 7 , Figure 8 The mating structure between the connecting shaft 107 and the end cover 115 is described below. The flange seat 113, the distribution seat 112, and the wear-resistant disc 111 of the rotating assembly constitute its fixed seat. The flange seat 113 and the distribution seat 112 constitute its base. The end cover 115 and the fixed seat form a hydraulic cavity. The central holes of the flange seat 113, the distribution seat 112, and the wear-resistant disc 111 constitute the central hole of the fixed seat, allowing the connecting shaft 107 to pass through the fixed seat and extend into the hydraulic cavity. The distribution disc 108 is located inside the hydraulic cavity, and the wear-resistant disc 111 is located inside the distribution disc 108. The mating surface of the wear-resistant disc 111 forms part of the inner wall surface of the hydraulic cavity. The water pressure chamber is connected to the water distribution tank 1081 through the water passage on the distribution plate 108. The wear-resistant plate 111 is located on the side of the distribution plate 108 away from the end cover 115. The end cover 115 is used to open the water pressure chamber. The end cover 115 is located on the side of the distribution plate 108 away from the wear-resistant plate 111. The distribution plate 108 can be replaced by opening the end cover 115.

[0073] The central hole of the connecting shaft 107 forms its internal water channel. One end of the connecting shaft 107 mates with the force transmission sleeve 104 and the inner water sleeve 103, and the other end is the water outlet, which mates with the end cover 115. The orifice of the central hole at the water outlet constitutes the water outlet, which is the water outlet of the water supply channel. The water outlet is located on the side of the distribution plate 108 facing the end cover 115 and away from the wear-resistant plate 111. The end cover 115 is provided with a rotating mounting hole and an end cover water channel. The water outlet of the connecting shaft 107 is rotatably mounted in the rotating mounting hole of the end cover 115. The end cover water channel connects the water outlet of the connecting shaft and the water pressure chamber. The portions of the connecting shaft 107 located on both sides of the distribution plate 108 can be supported on both sides by the distribution seat 112 and the end cover 115, which helps to ensure the axial position of the connecting shaft, ensure the coaxiality of the rotating component and the fixed component, and prevent uneven wear between the mating surfaces of the distribution plate and the fixed seat due to installation deviation. Moreover, the installation structure is stable, which helps to ensure reliable force and improve service life.

[0074] The end cap water channel communicates with the inner water pressure chamber but is isolated from the outer side. The end cap water channel includes various axial water channels 1151 distributed circumferentially around the rotating mounting hole. The extension direction of the axial water channels 1151 is consistent with the axis of the end cap 115. The use of various axial water channels can increase the flow area and save space. In other embodiments, the end cap water channel outlet may only be provided on one side of the rotating mounting hole.

[0075] The end cap water channel includes a buffer water chamber 1152. One end of an axial water channel 1151 communicates with the buffer water chamber 1152, and the other end communicates with the water pressure chamber. The outlet of the connecting shaft 107 leads to the buffer water chamber 1152. The projection of the buffer water chamber 1152 onto the axial direction of the connecting shaft 107 covers the projection of the outlet of the connecting shaft 107 and the projection of the axial water channel 1151 onto the axial direction of the connecting shaft. The buffer water chamber 1152 is located at the center of the end cap. Water enters the buffer water chamber 1152 from the outlet of the connecting shaft 107, and then enters each axial water channel 1151 from the buffer water chamber 1152, changing the direction of water flow so that it enters the water pressure chamber from the axial water channel 1151, which is beneficial to the stability of water flow. The cross-section of the buffer water chamber 1152 through the axis of the end cap is elliptical, and the outlet of the connecting shaft 107 is axially connected to the central area of ​​the buffer water chamber 1152. In other embodiments, instead of a buffer water cavity, radial water channels can be provided, with one axial water channel corresponding to one radial water channel to achieve water flow diversion. All radial water channels converge at the center and are correspondingly connected to the outlet of the connecting shaft.

[0076] The end cap 115 includes a separate end cap body and an end cap bushing 116. The end cap body has a bushing mounting hole that communicates with the buffer water chamber 1152. The end cap bushing 116 is installed in the bushing mounting hole, and the center hole of the end cap bushing 116 forms a rotating mounting hole to support the outer end of the connecting shaft 107 on the end cap 115. The end cap bushing 116 is fixedly installed at the center of the inner end of the end cap body. The outer end of the connecting shaft 107 passes through the end cap bushing 116, and the end cap water channel is provided on the end cap body. The end cap bushing 116 rotates relative to the connecting shaft 107, can be made of wear-resistant material, and is easy to replace individually. In other embodiments, the end cap can also be a one-piece molded structure.

[0077] The main body of the end cap 115 has a portion that fits into the central hole of the flange seat 113. This portion has a side surface that forms the inner wall of the hydraulic chamber, and its circumferential surface forms a circumferential seal with the inner wall of the flange seat 113, which is beneficial to the strength and installation stability of the end cap. The side surface of the end cap forming the inner wall of the hydraulic chamber is provided with a groove, and a rotating mounting hole for assembling the connecting shaft is located at the bottom of the groove. The end face of the end cap bushing 116 forms part of the bottom of the groove, resulting in a compact structure and saving space. In other embodiments, the entire end cap can be located outside the flange seat, and the thickness of the end cap only needs to meet the requirements of the water channel installation.

[0078] The distribution plate 108 is circumferentially anti-rotating and axially movable on the connecting shaft 107. The connecting shaft 107 is provided with a spline 1072, and the distribution plate 108 is provided with an anti-rotation mounting hole 1084 at its center. The two are connected by the spline 1072 engaging with the anti-rotation mounting hole 1084. The connecting shaft 107 has an outer end that passes through the distribution plate 108 and is located on the side of the distribution plate 108 facing away from the wear-resistant plate 111. The outer end is also the water outlet end. A locking nut 109 and a compression spring 1010 are installed on the connecting shaft 107 on the side of the distribution plate 108 facing away from the wear-resistant plate 111. The locking nut 109 is threadedly connected to the threaded section 1073 of the connecting shaft 107. The groove on the inner side of the end cap can avoid the locking nut. The compression spring 1010 is sleeved on the connecting shaft 107 and located between the locking nut 109 and the distribution plate 108. By tightening the locking nut 109, the compression spring 1010 forms a pre-pressure on the distribution plate 108 and the wear-resistant plate 111 to counteract wear and form an end-face sealing structure between the distribution plate 108 and the wear-resistant plate 111.

[0079] The water channel within the connecting shaft 107 includes a large-hole section and a small-hole section distributed and connected along its axial direction. The outlet of the water outlet is located in the large-hole section, and the inner diameter of the large-hole section is larger than that of the small-hole section. The portion of the connecting shaft containing the small-hole section passes through the distribution plate. Water enters the large-hole section from the small-hole section and then enters the buffer water chamber from the large-hole section, reducing the impact force of the water flow. The locking nut 109 can be locked by a radial set screw. The radial set screw can be tightened using the space within the large-hole section. The radial set screw is threaded onto the connecting shaft and can press against the inner wall of the locking nut.

[0080] A distributor plate 108 is assembled at the midpoint of the length of the connecting shaft 107. The distributor plate 108 has a center with an anti-rotation mounting hole 1084 for preventing rotation on the connecting shaft 107. The mounting angle of the distributor plate 108 can be adjusted to achieve transmission and spray direction adjustment. It can also be disassembled separately for easy replacement. The anti-rotation mounting hole 1084 is a spline hole, and the spline forms a concave-convex structure for anti-rotation engagement with the connecting shaft and axial sliding relative to it.

[0081] The following is combined Figure 7 , Figure 9 , Figure 10 The specific structure of the distribution plate 108 is described below. The distribution plate 108 has a water distribution groove 1081 extending along an arc, which is an arc-shaped water passage groove. The wear-resistant plate 111 has multiple wear-resistant plate water passage holes 1110 evenly distributed around its circumference. When the wear-resistant plate 111 rotates, the water distribution groove 1081 on the distribution plate 108 connects with some of the wear-resistant plate water passage holes 1110 on the wear-resistant plate 111, causing the nozzle 201 on the cutting head 200 to form a fan-shaped spray area in a set direction. The internal water channels of the rotating assembly include the wear-resistant plate water passage holes 1110 and the distribution seat water channels 1121. The distribution plate 108 has multiple distribution plate water passage holes 1082 penetrating the water distribution groove 1081, and the distribution plate water passage holes 1082 are spaced apart along an arc direction. The distribution plate 108 has a groove and a connecting hole through the groove in its central area. The central groove of the distribution plate is used to cooperate with the wear-resistant plate 111 to form a water pressure balance chamber. The water distribution tank 1081 faces the wear-resistant plate 111, and the wear-resistant plate 111 is in contact with the surface of the distribution plate 108. When the wear-resistant plate 111 rotates, water enters through the water passage holes 1110 of the wear-resistant plate that are connected to the water distribution tank 1081, while the others do not.

[0082] The water distribution trough 1081 and the central groove of the distribution plate are located on the side of the distribution plate 108 facing the wear-resistant plate 111. The annular surface of this plate surface surrounding the central groove of the distribution plate forms a contact surface, which is in close contact with the corresponding mating surface of the rotating component of the spray distribution mechanism. The mating surface is the side of the wear-resistant plate 111 facing the distribution plate, and the water passage hole 1110 of the wear-resistant plate is located on this mating surface. The contact surface and the mating surface respectively form the sealing and fitting end faces of the two. One section of the annular contact surface of the distribution plate 108 is a water-passing part of the water distribution trough 1081, and the rest is a non-water-passing part. The non-water-passing part corresponds to the water distribution trough 1081 in the circumferential direction, and the non-water-passing part is sufficient to block the wear-resistant plate water passage hole 1110 that does not correspond to the water distribution trough 1081 during use.

[0083] In this embodiment, the non-water-permeable portion of the contact surface of the distribution plate 108, outside the water distribution tank 1081, is provided with a recess to reduce the contact area between the non-water-permeable portion of the contact surface and the mating surface of the wear-resistant disc 111. This makes it less likely for small particles of debris in the water to remain between the mating surfaces of the distribution plate 108 and the wear-resistant disc 111. After entering the area with a reduced contact area, small particles of debris are easily detached from the mating surface and washed away. This prevents the contact surface of the distribution plate and the mating surface of the wear-resistant disc from being aggravated by small particles of debris entering between them, thus improving their service life.

[0084] The recess on the non-water-permeable portion of the distribution plate 108 includes a sludge-collecting flushing groove 1085. The groove 1085 is a recess with its opening located on the contact surface and facing the mating surface of the wear-resistant disc 111. The depth of the sludge-collecting flushing groove 1085 is the same as the depth of the central recess of the distribution plate. The sludge-collecting flushing groove 1085 is located at the center of the non-water-permeable portion of the distribution plate in the radial direction, and its width in the radial direction is smaller than the inner diameter of the water passage 1110 of the wear-resistant disc. The sludge-collecting flushing groove 1085 extends along an arc and is circumferentially spaced from the water distribution groove 1081. The sludge-collecting flushing groove 1085 can accommodate particles that enter between the distribution plate 108 and the wear-resistant disc 111, reducing wear and facilitating processing.

[0085] The recesses on the non-water-permeable portion of the distribution plate 108 include an outer edge recess 1086 located at the outer edge far from the center of the distribution plate 108 and an inner edge recess 1087 located at the inner edge near the center of the distribution plate 108. Since the contact surface is annular, the non-water-permeable portion has both inner and outer edges. The depth of the inner edge recess 1087 and the outer edge recess 1086 in the axial direction of the distribution plate 108 is the same as the depth of the central groove of the distribution plate. The outer edge recess 1086 contacts the outer circumferential surface of the distribution plate 108, and the inner edge recess 1087 contacts the circumferential inner wall surface of the central groove of the distribution plate, further reducing the contact area and facilitating the detachment of particles from the contact surface. The radial width of the area between the inner edge recess 1087 and the outer edge recess 1086 in the non-water-permeable portion of the distribution plate 108 is greater than the inner diameter of the water passage 1110 of the wear-resistant plate, ensuring a sealing function. The wear-resistant disc 111 is a surface that rubs against the inner edge recess 1087 and the sludge flushing tank 1085, and the outer edge recess 1086 and the sludge flushing tank 1085.

[0086] On the contact surface of the distribution plate 108, pressure-guiding and unloading grooves 1083 are respectively provided at both ends of the water distribution trough 1081 along its arc extension direction. The depth of the pressure-guiding and unloading grooves 1083 gradually decreases from the bottom of the water distribution trough 1081 to the friction contact surface, and the width of the groove opening also gradually decreases, which is conducive to the smooth flow of water. The number of distribution plate water passage holes 1082 on the distribution plate 108 that penetrate the water distribution trough 1081 is the same as the number of wear-resistant plate water passage holes 1110 set on the wear-resistant plate 111 within the angle range of the water distribution trough 1081. That is, the number of wear-resistant plate water passage holes 1110 that are completely connected to the water distribution trough 1081 at the same time is equal to the number of distribution plate water passage holes 1082, which is conducive to the stability of flow rate.

[0087] High-pressure water enters the spray distribution mechanism 100, passes sequentially through the inlet head 102, inner water jacket 103, connecting shaft 107, and end cover 115 to reach the water pressure chamber, then enters the distribution plate 108, passes through the distribution plate 108, wear-resistant plate 111, and distribution seat 112, and enters the nozzle 201 through the cutting head water channel 202 connected to the outlet of the spray distribution mechanism 100, finally being sprayed out from the nozzle 201. The direction of high-pressure water flow is shown in the figure. Figure 6 The direction of the middle arrow.

[0088] Because the wear-resistant disc 111 and the distribution disc 108 rotate relative to each other, when the wear-resistant disc water passage hole 1110 on the wear-resistant disc 111 rotates to correspond with the water distribution groove 1081 on the distribution disc 108, the water passage opens, ultimately forming a spray effect. When the wear-resistant disc water passage hole 1110 on the wear-resistant disc 111 rotates to other positions on the distribution disc 108, the water passage closes. There is always a portion of the water passage open and a portion closed. The arc angle of the water distribution groove 1081 on the distribution disc 108 determines the spray angle of the fan-shaped spray. The pressure guiding and unloading groove 1083 pre-pressure guides and pre-unloads the high-pressure water during the water passage opening and closing process, ensuring a smooth spray. The dirt-collecting and flushing groove 1085 serves to collect small particulate contaminants entering from the end face seal, reducing wear between the wear-resistant disc 111 and the distribution disc 108, and extending their service life. The spray direction of the final nozzle 201 can be adjusted by adjusting the relative angle between the distribution plate 108 and the connecting shaft 107 through the spline 1072.

[0089] This spray distribution mechanism enables the cutting head of a horizontal axis tunneling machine to rotate and directionally spray water, always in the direction of tunneling, at a fan-shaped angle. During the cutting process, the area where the cutting head generates dust can be promptly and effectively covered by the spray, thereby effectively reducing dust on the working surface, reducing wear on the cutting teeth, preventing operators and equipment from being sprayed with water, improving construction comfort, and extending equipment lifespan. It also allows for the maintenance and replacement of vulnerable parts inside the fan-shaped spray distribution mechanism without disassembling the cutting head. The connecting shaft and end cap provide stable support, contributing to a longer service life.

[0090] An embodiment of the spray distribution mechanism of the horizontal axis tunneling equipment of the present invention:

[0091] The spray distribution mechanism of the horizontal axis tunneling equipment in this embodiment has the same structure as the spray distribution mechanism of the horizontal axis tunneling equipment in the above embodiments, and will not be described again here.

[0092] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spray distribution mechanism for a horizontal axis tunneling device, comprising a fixed assembly for mounting on the main shaft of a cutting mechanism and a rotating assembly for mounting on a cutting head, the rotating assembly comprising a fixed seat and an end cap forming a hydraulic chamber, the fixed assembly comprising a connecting shaft extending into the hydraulic chamber through the fixed seat and a distribution plate mounted on the connecting shaft and located within the hydraulic chamber, the fixed seat having a mating surface for contacting the distribution plate, the connecting shaft having a water channel and the water outlet end of the connecting shaft located on the side of the distribution plate facing the end cap, characterized in that, The end cap is provided with a rotating mounting hole and an end cap water channel. The water outlet end of the connecting shaft is rotatably installed in the rotating mounting hole. The portions of the connecting shaft located on both sides of the distribution plate are supported on both sides by the fixing seat and the end cap, respectively. The end cap water channel connects the water outlet of the connecting shaft and the water pressure chamber.

2. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, characterized in that, The end cap water channel includes various axial water channels distributed around the rotating mounting hole in a circumferential direction, and the extension direction of the axial water channels is consistent with the axial direction of the end cap.

3. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 2, characterized in that, The end cap water channel includes a buffer water cavity. One end of the axial water channel is connected to the buffer water cavity, and the other end is connected to the water pressure cavity. The outlet of the water outlet end of the connecting shaft is connected to the buffer water cavity. The projection of the buffer water cavity on the axial direction of the connecting shaft covers the outlet of the water outlet end and the projection of the axial water channel on the axial direction of the connecting shaft.

4. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, 2, or 3, characterized in that, The water channel within the connecting shaft includes a large-hole section and a small-hole section distributed and connected along its axial direction. The inner diameter of the large-hole section is larger than the inner diameter of the small-hole section, and the water outlet of the outlet end is located in the large-hole section.

5. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, 2, or 3, characterized in that, The end cap includes an end cap body and an end cap bushing. The end cap body has a bushing mounting hole, and the end cap bushing is installed in the bushing mounting hole. The center hole of the end cap bushing constitutes the aforementioned rotating mounting hole, and the end cap water channel is provided on the end cap body.

6. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, 2, or 3, characterized in that, The end cap has a portion that fits into the center hole of the mounting base.

7. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, 2, or 3, characterized in that, The end cap forms a groove on the side of the inner wall of the hydraulic chamber, and the rotating mounting hole is located at the bottom of the groove.

8. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, 2, or 3, characterized in that, The distribution plate is circumferentially non-rotating and axially movable on the connecting shaft. A locking nut is threaded onto the side of the distribution plate opposite to the mating surface on the connecting shaft. A spring is provided between the locking nut and the distribution plate, and the spring is used to press the distribution plate.

9. The spray distribution mechanism of the horizontal axis tunneling equipment according to claim 1, 2, or 3, characterized in that, The fixed base includes a base and a wear-resistant disc that can be detachably and fixedly installed on the base. The mating surface is located on the wear-resistant disc. The distribution plate includes a contact surface that fits tightly with the mating surface during use. A water distribution groove is provided on the contact surface to allow water to flow from the water distribution groove into the rotating assembly through the water passage hole in the corresponding area of ​​the mating surface.

10. A horizontal-axis tunneling machine, characterized in that, It includes a cutting mechanism, which includes a cutting head, a cutting mechanism main shaft, and a spray distribution mechanism. The spray distribution mechanism includes the spray distribution mechanism of the horizontal axis tunneling equipment as described in any one of claims 1-9.

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