Water pump for internal spraying of roadheader and roadheader

Abstract

The utility model relates to the technical field of mining equipment, especially to a water pump for internal spraying of a tunneling machine and the tunneling machine. The water pump for internal spraying of the tunneling machine comprises: a piston having a driving part and a working part, a first water cavity, a second water cavity and the working part being located in a first cavity; the driving part is arranged in a second cavity and has a first protrusion and a second protrusion in sliding fit with a sliding groove; the working part is formed with a third protrusion in sealing fit with the first cavity; a cam sleeve is installed in the second cavity and has a helical groove with a channel formed in a closed loop on the inner wall; rotation of the cam sleeve makes the first protrusion move along the helical groove, and the second protrusion slides in the sliding groove to limit rotation of the piston, so that the piston only reciprocates, the volume of the first water cavity and the second water cavity changes alternately, and water absorption and pumping are realized. The utility model does not need to additionally add an oil circuit for driving the water pump, so that the overall structure is simpler and more compact, installation is convenient, there are fewer fault points, and internal spraying standardization is easy to realize.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a spray water pump for a tunneling machine and the tunneling machine itself. Background Technology

[0002] A tunneling machine (TBM) is a combined unit capable of cutting, loading, transporting, self-propelled movement, and dust suppression via spraying. The cutting section of a TBM includes a cutting head shaft and a cutting head. The cutting head shaft drives the cutting head to rotate, thus breaking the rock. An internal spray system is typically installed within the TBM for cooling and dust suppression. Currently, there are various methods for arranging water pumps within the cutting section to supply high-pressure water to the cutting head, hindering the standardization of the internal spray system. Furthermore, existing dedicated internal spray water pumps for TBMs are hydraulically driven, requiring inlet and outlet oil pipelines. This leads to frequent leaks in the sealing structure, complex piping, difficult parts manufacturing, and high costs, hindering widespread adoption. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a water pump for internal spraying in a tunneling machine and a tunneling machine, so as to solve the problems of the numerous installation methods of water pumps in the internal spraying system of existing tunneling machines, which are not conducive to the standardized implementation of internal spraying structure; and the water pump is driven by hydraulic power, which leads to complex structure, easy leakage and high manufacturing cost.

[0004] The first aspect of this utility model provides a spray water pump for an internal tunneling machine, comprising: The waterway includes a water inlet channel, a pressurization channel, and a high-pressure water channel connected in sequence, wherein the pressurization channel includes a first water chamber and a second water chamber; The housing assembly has a first cavity and a second cavity that are connected inside, and the pressurization channel is disposed in the first cavity; A piston is formed in a strip shape, and a sliding groove extending along the length direction of the piston is formed in the second cavity. One end of the piston in the length direction is formed as a working part disposed in the first cavity, and the other end of the piston in the length direction is formed as a driving part disposed in the second cavity. A first protrusion and a second protrusion that slides and engages with the sliding groove are formed on the circumferential sidewall of the driving part. A third protrusion that seals and engages with the first cavity is formed on the circumferential sidewall of the working part, such that, in the length direction of the piston, the first water cavity is disposed on the side of the third protrusion closer to the driving part, and the second water cavity is disposed on the side of the third protrusion away from the driving part. A cam sleeve is installed in the second cavity and surrounds the circumferential sidewall of the drive unit; a spiral groove is formed on the inner wall of the cam sleeve, the ends of the spiral groove are connected to form a closed loop channel, and at least part of the first protrusion extends into the spiral groove; the rotation of the cam sleeve causes the first protrusion to move along the spiral groove, and the second protrusion slides in the sliding groove to restrict the rotation of the piston, so as to drive the piston to reciprocate along its length direction, thereby causing the volume of the first water cavity and the second water cavity to change alternately.

[0005] Preferably, a first lubricating oil chamber is formed in the first cavity, a second lubricating oil chamber is formed in the second cavity, and a lubricating oil channel is provided on the piston to connect the first lubricating oil chamber and the second lubricating oil chamber.

[0006] Preferably, the working part is formed as a stepped shaft along the length direction of the piston. The working part includes a first stepped segment, a second stepped segment, and a third stepped segment connected in sequence. The third stepped segment is connected to the driving part, and the third protrusion is formed on the second stepped segment. Along the length of the piston, the cavity wall of the first cavity is provided with a first sealing area that seals with the first stepped section, a second sealing area that seals with the second stepped section, and a third sealing area that seals with the third stepped section. Along the length of the piston, the first water chamber is disposed between the second sealing area and the third sealing area, the first lubricating oil chamber is disposed between the first sealing area and the second sealing area, and the second water chamber is disposed on the side of the first sealing area away from the first lubricating oil chamber.

[0007] Preferably, in the length direction perpendicular to the piston, the radial dimension of the first stepped segment is D1, in dm; the radial dimension of the second stepped segment is D2, in dm; and the radial dimension of the third stepped segment is D3, in dm; D1 2 =D3 2 -D2 2 .

[0008] Preferably, the first sealing area, the second sealing area, and the third sealing area each include a plurality of sealing rings arranged at intervals along the length of the piston, and a high-pressure water leakage channel communicating with the water inlet channel is provided between two adjacent sealing rings.

[0009] Preferably, the housing assembly includes a front water distribution plate, a front housing, a rear water distribution plate, a rear housing, and a cap connected sequentially along the length of the piston. The first cavity is formed within the space enclosed by the front water distribution plate, the front housing, and the rear water distribution plate, and the second cavity is formed within the space enclosed by the rear water distribution plate, the rear housing, and the cap. The front-end water distribution plate and / or the rear-end water distribution plate are equipped with a one-way valve that connects to the water passage.

[0010] Preferably, a first positioning element is provided between the front water distribution plate and the front housing, and a second positioning element is provided between the rear water distribution plate and the front housing.

[0011] Preferably, the cam sleeve is driven to rotate by a first power input component, and the entire spray water pump inside the tunneling machine is driven to rotate by a second power input component, with a speed difference between the first power input component and the second power input component; The flow rate of the spray water pump inside the tunneling machine is Q, in L / min; the stroke of the piston is A, in dm; the rotational speed of the first power input component is n1, in r / min; and the rotational speed of the second power input component is n2, in r / min. When the rotational speeds output by the first power input device and the second power input device are in the same direction, Q = A(n1-n2)πD1 2 / 2; When the rotational speeds output by the first power input device and the second power input device are in opposite directions, Q=A(n1+n2)πD1 2 / 2.

[0012] Preferably, a sliding bearing is provided on the circumferential sidewall of the first protrusion, the sliding bearing being rotatably connected to the first protrusion, and the first protrusion being able to drive the sliding bearing to roll along the spiral groove.

[0013] The second aspect of this utility model provides a tunneling machine, including the internal spray water pump described in any of the above technical solutions.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In the internal spray water pump of this utility model for a tunneling machine, the water channel includes a sequentially connected inlet channel, a pressurization channel, and a high-pressure water channel. The pressurization channel includes a first water chamber and a second water chamber. The housing assembly has a connected first chamber and a second chamber inside, with the pressurization channel located in the first chamber. The piston is formed as a strip structure, and a sliding groove extending along the length direction of the piston is formed in the second chamber. One end of the piston in the length direction forms a working part located in the first chamber, and the other end of the piston in the length direction forms a driving part located in the second chamber. A first protrusion and a second protrusion that slides and engages with the sliding groove are formed on the circumferential sidewall of the driving part. A third protrusion that seals and engages with the first chamber is formed on the circumferential sidewall of the working part, such that in the length direction of the piston, the first water chamber is located on the side of the third protrusion closer to the driving part, and the second water chamber is located on the side of the third protrusion farther from the driving part. The cam sleeve is installed in the second cavity and surrounds the circumferential sidewall of the drive unit. A spiral groove is opened on the inner wall of the cam sleeve, and the ends of the spiral grooves are connected to form a closed loop channel. At least part of the first protrusion extends into the spiral groove. The rotation of the cam sleeve causes the first protrusion to move along the spiral groove, and the second protrusion slides in the sliding groove to restrict the rotation of the piston, so as to drive the piston to reciprocate along its length direction, thereby causing the volume of the first water cavity and the second water cavity to change alternately, realizing the water pump's suction and pumping. This eliminates the need for the hydraulic drive oil circuit in the traditional water pump. The water pump can be driven by the rotation of the cam sleeve, meeting the demand for high-pressure water supply. The structure is simpler and more compact, with fewer failure points, lower processing difficulty and cost, and convenient installation. Only a few parts need to be replaced on existing tunneling equipment to realize the internal spraying function, which is easy to standardize and thus improve the performance and service life of the tunneling machine.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the spray water pump inside the tunneling machine provided for an embodiment of this utility model; Figure 2 For along Figure 1 Axial cross-sectional view of the water pump cut at point AA; Figure 3 For along Figure 2 Axial cross-sectional view of the water pump cut at point CC; Figure 4 For along Figure 1 Cross-sectional view of the water pump cut at point JJ; Figure 5 For along Figure 4 Axial cross-sectional view of the water pump cut at point KK; Figure 6 A schematic diagram of the internal spray water pump of the tunneling machine provided in an embodiment of this utility model from another perspective; Figure 7 For along Figure 6 Axial cross-sectional view of the water pump cut at the EE section; Figure 8 For along Figure 6 Axial cross-sectional view of the water pump cut at point FF; Figure 9 For along Figure 6 Axial cross-sectional view of the water pump cut at point GG.

[0018] Icons: 101-First water chamber; 102-Second water chamber; 11-Inlet channel; 110-Inlet annular channel; 12-High-pressure water channel; 120-High-pressure water annular channel; 121-High-pressure water outlet; 122-High-pressure water inlet; 13-High-pressure water leakage channel; 131-Support ring; 14-Check valve; 201-Front-end water distribution plate; 202-Front-end housing; 203-Rear-end water distribution plate; 204-Rear-end housing; 205-Cap; 206-First positioning element; 207-Second positioning element; 21-First cavity; 211-First sealing area; 212-Second sealing area; 213-Third sealing area; 22-Second cavity; 2 21-Sliding groove; 100-First lubricating oil chamber; 200-Second lubricating oil chamber; 30-Piston; 31-Working part; 301-Third protrusion; 311-First stepped section; 312-Second stepped section; 313-Third stepped section; 32-Drive part; 321-First protrusion; 322-Second protrusion; 33-Lubricating oil passage; 40-Cam sleeve; 41-Helical groove; 50-First power input component; 51-Sealed bushing; 61-Sliding bearing; 62-First bearing; 63-Second bearing; 64-Bearing seat. Detailed Implementation

[0019] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0020] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0021] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0022] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0023] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0024] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0025] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0026] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0027] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0028] According to a first aspect of the present invention, a spray water pump for an internal tunneling machine is provided, which includes a water passage, a housing assembly, a piston 30, and a cam sleeve 40.

[0029] The specific structure of the above-mentioned components of the spray water pump inside the tunneling machine according to this embodiment will be described below.

[0030] like Figures 1 to 9As shown, the water channel includes an inlet channel 11, a pressurization channel, and a high-pressure water channel 12 connected in sequence. External water enters the pressurization channel through the inlet channel 11. Driven by a pump, the pressurization channel pressurizes the water to form high-pressure water, which is then transported to the high-pressure water channel 12. The output end of the high-pressure water channel 12 is a high-pressure water outlet 121, and the input end is a high-pressure water inlet 122. In this embodiment, the pressurization channel includes a first water chamber 101 and a second water chamber 102.

[0031] like Figures 1 to 9 As shown, the housing assembly has a first cavity 21 and a second cavity 22 that are connected inside. The first cavity 21 and the second cavity 22 are arranged along the axial direction of the spray water pump inside the tunneling machine. The pressurization channel is provided in the first cavity 21. A sliding groove 221 extending along the length direction of the piston 30 is formed in the second cavity 22. The sliding groove 221 can be formed by the cavity wall of the second cavity 22 being recessed inward.

[0032] like Figure 2 , Figure 3 , Figure 5 , Figures 7 to 9 As shown, the piston 30 is installed in the first cavity 21 and the second cavity 22 and is formed into a strip structure. The length direction of the piston 30 is the axial direction of the spray water pump inside the tunneling machine. Specifically, one end of the piston 30 in the length direction is formed as a working part 31 disposed in the first cavity 21, and the other end of the piston 30 in the length direction is formed as a driving part 32 disposed in the second cavity 22, so that the working part 31 and the driving part 32 are arranged in the length direction of the piston 30.

[0033] More specifically, such as Figure 2 and Figure 8 As shown, the drive unit 32 has a first protrusion 321 and a second protrusion 322 that slides in conjunction with the sliding groove 221 on the circumferential sidewall surrounding the axis of the water pump. The first protrusion 321 and the second protrusion 322 preferably protrude outward along the radial direction of the water pump. The first protrusion 321 and the second protrusion 322 can be formed as an integral structure with the piston 30. Preferably, the first protrusion 321 and the second protrusion 322 are assembled with the piston 30 respectively. The first protrusion 321 can be a screw, stud, or fixing pin, etc., and the second protrusion 322 can be a strip-shaped key structure. The second protrusion 322 can be fixed to the sidewall of the piston 30 by fasteners.

[0034] Preferably, the first protrusion 321 and the second protrusion 322 have different protrusion directions to avoid interference between the movements of the first protrusion 321 and the second protrusion 322, and to shorten the length of the drive part 32, which is beneficial for saving space and facilitating layout.

[0035] Optionally, such as Figure 2As shown, the first protrusion 321 and the second protrusion 322 can be arranged opposite each other in the radial direction of the drive part 32.

[0036] like Figure 2 , Figure 3 , Figure 5 , Figures 7 to 9 As shown, a third protrusion 301 is formed on the circumferential sidewall of the working part 31 to seal with the cavity wall of the first cavity 21, such that in the length direction of the piston 30, the first water cavity 101 is located on the side of the third protrusion 301 close to the drive part 32, and the second water cavity 102 is located on the side of the third protrusion 301 away from the drive part 32. In this way, the third protrusion 301 separates the first water cavity 101 and the second water cavity 102 in the axial direction, so that when the piston 30 reciprocates, the volume of the first water cavity 101 and the second water cavity 102 can be changed simultaneously, so that when the volume of one increases, the volume of the other decreases accordingly.

[0037] like Figure 2 , Figure 3 , Figure 5 , Figures 7 to 9 As shown, the cam sleeve 40 is formed into a sleeve-shaped structure. The cam sleeve 40 is installed in the second cavity 22 and is disposed around the circumferential side wall of the drive part 32, so that the cam sleeve 40 is disposed between the drive part 32 and the housing assembly in the radial direction. A spiral groove 41 is provided on the inner wall of the cam sleeve 40. The spiral extension direction of the spiral groove 41 is set at an angle to both the axial and radial directions. The beginning and end of the spiral groove 41 are connected to form a closed loop channel. That is, the beginning and end of the spiral line forming the spiral groove 41 are connected to form a continuous channel. At least part of the first protrusion 321 extends into the spiral groove 41.

[0038] When the cam sleeve 40 rotates, the spiral groove 41 rotates with it. The rotation of the spiral groove 41 provides an axial force to the first protrusion 321, changing the mating position between the first protrusion 321 and the spiral groove 41. This causes relative motion in the spiral channel formed by the first protrusion 321 and the spiral groove 41. Since the second protrusion 322 can only slide in the sliding groove 221 along the length of the piston 30 when the drive unit 32 moves, this restricts the relative rotation of the piston 30 and the housing assembly. Ultimately, the rotation of the cam sleeve 40 causes relative displacement between it and the drive unit 32, thus enabling the rotation of the cam sleeve 40 to drive the piston 30 along its length... The water pump reciprocates in a certain direction, causing the volumes of the first water chamber 101 and the second water chamber 102 to change alternately. The pump draws in and pumps water by changing the volume from small to large and from large to small. This eliminates the need for the hydraulic drive circuit in traditional water pumps. The pump can be driven by the rotation of the cam sleeve 40, which meets the demand for high-pressure water supply. The structure is simpler and more compact, with fewer failure points, lower processing difficulty and cost, and convenient installation. The internal spray function can be implemented on existing tunneling equipment (such as tunneling machines) by only replacing a few parts. It is easy to standardize the internal spray function, thereby improving the performance and service life of the water pump.

[0039] In a preferred embodiment, such as Figure 2 As shown, a sliding bearing 61 is provided on the circumferential sidewall of the first protrusion 321. Specifically, the sliding bearing 61 is formed into an annular structure and is fitted onto the circumferential sidewall of the first protrusion. The sliding bearing 61 is rotatably connected to the first protrusion 321 and can contact the groove wall of the spiral groove 41. The first protrusion 321 can drive the sliding bearing 61 to roll along the spiral groove 41, thereby improving the smoothness of the relative movement between the cam sleeve 40 and the drive part 32, and reducing the wear of the first protrusion 321 by the spiral groove 41, thus improving the performance and service life of the water pump.

[0040] In this embodiment, as Figure 2 , Figure 3 , Figure 5 , Figures 7 to 9 As shown, a first lubricating oil chamber 100 is formed in the first cavity 21, and a second lubricating oil chamber 200 is formed in the second cavity 22. The reciprocating motion of the piston 30 causes the first lubricating oil chamber 100 and the second lubricating oil chamber 200 to undergo volume changes. To avoid the high pressure generated by the volume change affecting the operation of the water pump, a lubricating oil channel 33 is provided on the piston 30 to connect the first lubricating oil chamber 100 and the second lubricating oil chamber 200.

[0041] Furthermore, in this embodiment, as Figure 5As shown, the working part 31 is formed as a stepped shaft. Specifically, along the length direction of the piston 30, the working part 31 includes a first stepped section 311, a second stepped section 312, and a third stepped section 313 connected in sequence, wherein the third stepped section 313 is connected to the drive part 32, and a third protrusion 301 is formed on the second stepped section 312, such that the radial dimension of the second stepped section 312 is greater than the radial dimension of the first stepped section 311 and the radial dimension of the second stepped section 312 is greater than the radial dimension of the third stepped section 313.

[0042] To ensure that the volume changes of the first lubricating oil cavity 100 and the second lubricating oil cavity 200 are the same, that is, the cross-sectional areas of the first lubricating oil cavity 100 and the second lubricating oil cavity 200 perpendicular to the axial direction are the same, in this embodiment, as follows: Figure 5 As shown, D1 2 =D3 2 -D2 2 The radial dimension of the first step segment 311 is D1, in dm; the radial dimension of the second step segment 312 is D2, in dm; and the radial dimension of the third step segment 313 is D3, in dm.

[0043] like Figure 3 As shown, along the length of the piston 30, the cavity wall of the first cavity 21 is provided with a first sealing area 211 that seals with the first stepped section 311, a second sealing area 212 that seals with the second stepped section 312, and a third sealing area 213 that seals with the third stepped section 313. Specifically, the first sealing area 211, the second sealing area 212, and the third sealing area 213 all include an annular groove formed in the cavity wall of the first cavity 21 and a sealing ring embedded in the annular groove. The sealing ring can abut against the circumferential sidewall of the working part 31 to achieve a seal. Figure 2 As shown, along the length of the piston 30, the first water chamber 101 is disposed between the second sealing area 212 and the third sealing area 213, the first lubricating oil chamber 100 is disposed between the first sealing area 211 and the second sealing area 212, and the second water chamber 102 is disposed on the side of the first sealing area 211 away from the first lubricating oil chamber 100.

[0044] Furthermore, such as Figure 2 , Figure 8 and Figure 9 As shown, the first sealing area 211, the second sealing area 212 and the third sealing area 213 include a plurality of sealing rings arranged at intervals along the length of the piston 30. A high-pressure water leakage channel 13 communicating with the water inlet channel 11 is provided between two adjacent sealing rings in each sealing area to prevent high-pressure water from leaking into the first lubricating oil chamber 100 or the second lubricating oil chamber 200 and affecting the life of the water pump.

[0045] Preferably, a support ring 131 is installed in the groove of the high-pressure water leakage channel 13 in the first sealing area 211 and the third sealing area 213. The support ring 131 supports the piston 30 and absorbs the radial force generated when the piston 30 moves, preventing the piston 30 from scratching the sealing surface of the piston 30 by contact with the housing assembly.

[0046] Specifically, in this embodiment, such as Figures 1 to 9 As shown, the housing assembly includes a front water distribution plate 201, a front housing 202, a rear water distribution plate 203, a rear housing 204, and a cover 205 connected sequentially along the length of the piston 30. A first cavity 21 is formed within the space enclosed by the front water distribution plate 201, the front housing 202, and the rear water distribution plate 203, and a second cavity 22 is formed within the space enclosed by the rear water distribution plate 203, the rear housing 204, and the cover 205. Specifically, as described above, a first sealing area 211 is provided on the front water distribution plate 201, a second sealing area 212 is provided on the front housing 202, a third sealing area 213 is provided on the rear water distribution plate 203, and a sliding groove 221 as described above is provided on the rear water distribution plate 203.

[0047] like Figures 1 to 9 As shown, the water inlet channel 11 includes a water inlet annular channel 110 disposed on the circumferential outer wall of the housing assembly, and the high-pressure water channel 12 includes a high-pressure water annular channel 120 disposed on the circumferential outer wall of the housing assembly. The water inlet annular channel 110 and the high-pressure water annular channel 120 are spaced apart axially. Multiple sealing surfaces are provided on the circumferential outer wall of the housing assembly. The water inlet annular channel 110 and the high-pressure water annular channel 120 are respectively disposed between two adjacent sealing surfaces. The sealing surface can be a structure in which a sealing ring is embedded in an annular groove opened on the outer wall of the housing assembly. The internal spray water pump of the tunneling machine is fixedly assembled into the mounting cavity, and the sealing of the water inlet annular channel 110 and the high-pressure water annular channel 120 is achieved by the contact between the sealing surface and the cavity wall of the mounting cavity. Figure 7 and Figure 8 As shown, the water inlet annular channel 110 is connected to the high-pressure water leakage channel 13.

[0048] In this embodiment, as Figure 8 and Figure 9 As shown, the front water distribution plate 201 and / or the rear water distribution plate 203 are equipped with a one-way valve 14 that connects to the water passage, thus ensuring that the water flow direction is determined. The one-way valve 14 controls the water flow direction to ensure reliable water suction and pumping functions.

[0049] In a preferred embodiment, such as Figure 2 As shown, the axis of piston 30 is offset from the axis of water pump, that is, the axis of piston 30 and the axis of water pump are parallel to each other and are spaced apart in the radial direction, so as to provide space for the installation of check valve 14 and water passage.

[0050] Furthermore, in this embodiment, as Figure 2 As shown, a first positioning element 206 is provided between the front water distribution plate 201 and the front housing 202. Specifically, the first positioning element 206 is provided on the surfaces of the front water distribution plate 201 and the front housing 202 that are opposite to each other. A second positioning element 207 is provided between the rear water distribution plate 203 and the front housing 202. The second positioning element 207 is provided on the surfaces of the rear water distribution plate 203 and the front housing 202 that are opposite to each other. The first positioning element 206 and the second positioning element 207 can be positioning pin structures, which facilitates the circumferential alignment of the front water distribution plate 201, the front housing 202 and the rear water distribution plate 203 during assembly, ensuring accurate installation of each component in the water pump and ensuring that the mating surface of the bearing assembly described below is parallel to the axis of the water pump.

[0051] In this embodiment, the cam sleeve 40 is driven to rotate by the first power input component 50. The first power input component 50 can be driven by the drive shaft of a drive device (such as a motor). The first power input component 50 is fixedly connected to the cam sleeve 40 and arranged coaxially with the water pump.

[0052] like Figure 3 and Figure 7 As shown, the spray water pump inside the tunneling machine also includes a bearing assembly, which includes a first bearing 62, a second bearing 63, and a bearing housing 64. The bearing housing 64 is sandwiched between the cover 205 and the rear housing 204. The first bearing 62 is installed between the circumferential outer wall of the first power input component 50 and the bearing housing 64. The first bearing 62 has an oil seal on the side facing away from the cam sleeve 40 in the axial direction. There are two second bearings 63, which are respectively located on both sides of the cam sleeve 40 in the axial direction. One second bearing 63 is located between the cam sleeve 40 and the rear water distribution plate 203, and the other second bearing 63 is located between the cam sleeve 40 and the bearing housing 64.

[0053] Furthermore, a sealing bushing 51 is installed on the circumferential sidewall of the first power input component 50. The oil seal, as described above, mates with the sealing bushing 51. A wear-resistant layer is provided on the surface of the sealing bushing 51 that mates with the oil seal. This wear-resistant layer can be a ceramic layer, formed through surface treatment on the surface of the sealing bushing 51 that mates with the oil seal. In other alternative embodiments, the sealing bushing 51 is entirely made of a wear-resistant material, such as an entirely ceramic material.

[0054] It should be noted that the water pump for spraying inside the tunneling machine in this application can be driven by only one power source, that is, the water pump can be driven by only the rotation of the first power input component 50.

[0055] In a preferred embodiment, the internal spray water pump of the tunneling machine is installed on the cutting section of the tunneling machine and driven by a cutting reducer. The cutting reducer includes an input shaft and an output shaft. The power output from the input shaft is transmitted to the output shaft via a reduction assembly (e.g., a planetary gear system), creating a speed difference between the input and output shafts. The output shaft drives the cutting head shaft in the cutting section to rotate. The input shaft on the cutting reducer drives the first power input component 50, as described above, to rotate. The cam sleeve 40 is driven to rotate by the first power input component 50. The entire internal spray water pump of the tunneling machine is driven to rotate by a second power input component. The second power input component can be either the output shaft of the cutting reducer or the cutting head shaft, allowing the internal spray water pump of the tunneling machine to be installed entirely on the output shaft of the cutting reducer and / or the cutting head shaft. Specifically, the internal spray water pump of the tunneling machine can be installed entirely inside the output shaft of the cutting reducer or inside the cutting head shaft, so that the internal spray water pump of the tunneling machine can operate even when rotating.

[0056] Furthermore, since there is a speed difference between the first power input component 50 that drives the cam sleeve 40 to rotate and the second power input component that drives the overall rotation of the spray water pump inside the tunneling machine, there is a speed difference between the input shaft and the output shaft of the cutting reducer.

[0057] In this embodiment, the flow rate of the spray water pump inside the tunneling machine is Q, in L / min; the stroke of the piston 30 is A, in dm; the rotational speed of the first power input component 50 is n1, in r / min; the rotational speed of the second power input component is n2, in r / min; when the rotational speeds output by the first power input component 50 and the second power input component are in the same direction, Q = A(n1-n2)πD1 2 / 2; When the rotational speeds output by the first power input device 50 and the second power input device are in opposite directions, Q=A(n1+n2)πD1 2 / 2.

[0058] According to the present invention, the internal spray water pump of a tunneling machine includes a water channel comprising a sequentially connected inlet channel, a pressurizing channel, and a high-pressure water channel. The pressurizing channel includes a first water chamber and a second water chamber. The housing assembly has a first cavity and a second cavity connected internally, with the pressurizing channel located in the first cavity. The piston is formed as a strip structure, and a sliding groove extending along the length of the piston is formed in the second cavity. One end of the piston in the length direction forms a working part located in the first cavity, and the other end forms a driving part located in the second cavity. A first protrusion and a second protrusion slidingly engaging with the sliding groove are formed on the circumferential sidewall of the driving part. A third protrusion sealingly engaging with the cavity wall of the first cavity is formed on the circumferential sidewall of the working part, such that, in the length direction of the piston, the first water chamber is located on the side of the third protrusion closer to the driving part, and the second water chamber is located on the side of the third protrusion farther from the driving part. On one side, a cam sleeve is installed in the second cavity and surrounds the circumferential sidewall of the drive unit; a spiral groove is opened on the inner wall of the cam sleeve, and the ends of the spiral grooves are connected to form a closed loop channel, with at least a portion of the first protrusion extending into the spiral groove; the rotation of the cam sleeve causes the first protrusion to move along the spiral groove, and the second protrusion slides in the sliding groove to restrict the piston rotation, thereby driving the piston to reciprocate along its length, thus causing the volumes of the first water cavity and the second water cavity to change alternately, realizing the water pump's suction and pumping. This eliminates the need for the hydraulic drive oil circuit in traditional water pumps, and the water pump can be driven by the rotation of the cam sleeve, meeting the demand for high-pressure water supply. The structure is simpler and more compact, with fewer failure points, lower processing difficulty and cost, and convenient installation. Only a few parts need to be replaced on existing tunneling equipment to achieve the internal spraying function, making it easy to standardize the internal spraying, thereby improving the performance and service life of the tunneling machine.

[0059] The second aspect of this utility model provides a tunneling machine including the in-machine spray water pump as described above, thus having all the beneficial effects of the in-machine spray water pump, which will not be repeated here.

[0060] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A spray water pump for an internal tunneling machine, characterized in that, include: The waterway includes a water inlet channel, a pressurization channel, and a high-pressure water channel connected in sequence, wherein the pressurization channel includes a first water chamber and a second water chamber; The housing assembly has a first cavity and a second cavity that are connected inside, and the pressurization channel is disposed in the first cavity; A piston is formed in a strip shape, and a sliding groove extending along the length direction of the piston is formed in the second cavity. One end of the piston in the length direction is formed as a working part disposed in the first cavity, and the other end of the piston in the length direction is formed as a driving part disposed in the second cavity. A first protrusion and a second protrusion that slides and engages with the sliding groove are formed on the circumferential sidewall of the driving part. A third protrusion that seals and engages with the first cavity is formed on the circumferential sidewall of the working part, such that, in the length direction of the piston, the first water cavity is disposed on the side of the third protrusion closer to the driving part, and the second water cavity is disposed on the side of the third protrusion away from the driving part. A cam sleeve is installed in the second cavity and surrounds the circumferential sidewall of the drive unit; a spiral groove is formed on the inner wall of the cam sleeve, the ends of the spiral groove are connected to form a closed loop channel, and at least part of the first protrusion extends into the spiral groove; the rotation of the cam sleeve causes the first protrusion to move along the spiral groove, and the second protrusion slides in the sliding groove to restrict the rotation of the piston, so as to drive the piston to reciprocate along its length direction, thereby causing the volume of the first water cavity and the second water cavity to change alternately.

2. The spray water pump inside the tunneling machine according to claim 1, characterized in that, A first lubricating oil chamber is formed in the first cavity, and a second lubricating oil chamber is formed in the second cavity. A lubricating oil passage is provided on the piston to connect the first lubricating oil chamber and the second lubricating oil chamber.

3. The spray water pump inside the tunneling machine according to claim 2, characterized in that, The working part is formed as a stepped shaft. Along the length direction of the piston, the working part includes a first stepped segment, a second stepped segment, and a third stepped segment connected in sequence. The third stepped segment is connected to the driving part, and the third protrusion is formed on the second stepped segment. Along the length of the piston, the cavity wall of the first cavity is provided with a first sealing area that seals with the first stepped section, a second sealing area that seals with the second stepped section, and a third sealing area that seals with the third stepped section. Along the length of the piston, the first water chamber is disposed between the second sealing area and the third sealing area, the first lubricating oil chamber is disposed between the first sealing area and the second sealing area, and the second water chamber is disposed on the side of the first sealing area away from the first lubricating oil chamber.

4. The spray water pump inside the tunneling machine according to claim 3, characterized in that, In the direction perpendicular to the length of the piston, the radial dimension of the first stepped segment is D1, in dm; the radial dimension of the second stepped segment is D2, in dm; and the radial dimension of the third stepped segment is D3, in dm. 2 =D3 2 -D2 2 .

5. The spray water pump inside the tunneling machine according to claim 3, characterized in that, The first sealing area, the second sealing area, and the third sealing area each include a plurality of sealing rings arranged at intervals along the length of the piston, and a high-pressure water leakage channel communicating with the water inlet channel is provided between two adjacent sealing rings.

6. The spray water pump inside the tunneling machine according to claim 1, characterized in that, The housing assembly includes a front water distribution plate, a front housing, a rear water distribution plate, a rear housing, and a cover connected sequentially along the length of the piston. The first cavity is formed within the space enclosed by the front water distribution plate, the front housing, and the rear water distribution plate, and the second cavity is formed within the space enclosed by the rear water distribution plate, the rear housing, and the cover. The front-end water distribution plate and / or the rear-end water distribution plate are equipped with a one-way valve that connects to the water passage.

7. The spray water pump inside the tunneling machine according to claim 6, characterized in that, A first positioning element is provided between the front water distribution plate and the front housing, and a second positioning element is provided between the rear water distribution plate and the front housing.

8. The spray water pump inside the tunneling machine according to claim 4, characterized in that, The cam sleeve is driven to rotate by the first power input component, and the entire spray water pump inside the tunneling machine is driven to rotate by the second power input component. The first power input component and the second power input component have a speed difference. The flow rate of the spray water pump inside the tunneling machine is Q, in L / min; the stroke of the piston is A, in dm. The rotational speed of the first power input component is n1, in r / min; the rotational speed of the second power input component is n2, in r / min. When the rotational speeds output by the first power input device and the second power input device are in the same direction, Q = A(n1-n2)πD1 2 / 2; When the rotational speeds output by the first power input device and the second power input device are in opposite directions, Q=A(n1+n2)πD1 2 / 2.

9. The spray water pump inside the tunneling machine according to claim 1, characterized in that, A sliding bearing is provided on the circumferential sidewall of the first protrusion. The sliding bearing is rotatably connected to the first protrusion, and the first protrusion can drive the sliding bearing to roll along the spiral groove.

10. A tunneling machine, characterized in that, Includes the internal spray water pump for tunneling machines as described in any one of claims 1 to 9.

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