Small-pitch parallel tool changing gate and cutter head

Abstract

The application relates to the technical field of engineering machinery shield machines, in particular to a small-interval parallel tool changing gate and a cutter head. The small-interval parallel tool changing gate comprises a connecting assembly, a lifting conversion assembly and two gates; the two gates are arranged in parallel, each gate comprises a gate body and a gate plate, the lifting conversion assembly is located between the two gate bodies, the connecting assembly is arranged on the lifting conversion assembly, the lifting conversion assembly is used for driving the connecting assembly to rotate, so that the connecting assembly is connected with any gate plate, and the lifting conversion assembly drives the gate plate to move through the connecting assembly, so that the gate is closed or opened. The small-interval parallel tool changing gate provided by the application reduces the arrangement space of adjacent gates, reduces the interval of cutters on the cutter head, improves the rock breaking capacity of the normal pressure composite cutter head, reduces the number of cutter arrangement radial arms at the same time, increases the cutter head opening, and effectively reduces the problem of cutter head mud cake.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery shield machine, and particularly to a small-interval parallel tool changing gate and cutter head. BACKGROUND

[0002] With the development of shield machine technology, large-diameter shield machines have been widely used in urban highway tunnels, cross-river highway tunnels and other large-section tunnel projects. The atmospheric pressure cutter head has become the mainstream choice for large-diameter shield cutter heads because it can realize safe tool changing under atmospheric pressure.

[0003] During the propulsion of the shield machine, components such as damaged or worn-out shield cutters need to be replaced. When changing tools, the cutter is first retracted into the cutter barrel, and then the gate is used to close the cutter barrel, thereby isolating the external pressure and performing tool changing under atmospheric pressure. After the tool changing is completed, the cutter is sent back to the cutter barrel, the gate is opened, and the cutter is pushed out.

[0004] Due to the limited space of the cutter head body, the large size of the tool changing device structure, and other limiting conditions, and in order to arrange a certain number of atmospheric pressure cutters, more cutter head arms need to be designed to arrange corresponding tool changing gates and other components, making it difficult to achieve small-interval arrangement of cutters. SUMMARY

[0005] The present application provides a small-interval parallel tool changing gate and cutter head to solve the problem of large spacing between atmospheric pressure cutters of the atmospheric pressure cutter head.

[0006] In one aspect, the present application provides a small-interval parallel tool changing gate, comprising a connecting assembly, a lifting conversion assembly, and two gates; the gate comprises a gate body and a gate plate, the lifting conversion assembly is located between the two gate bodies, the connecting assembly is arranged on the lifting conversion assembly, the lifting conversion assembly is used to drive the connecting assembly to rotate, so that the connecting assembly is connected with any of the gate plates, and the lifting conversion assembly drives the gate plate to move through the connecting assembly, so as to close or open the gate.

[0007] In some embodiments, the lifting conversion assembly comprises a main hydraulic cylinder and a conversion piece, the main hydraulic cylinder comprises a main cylinder and a piston rod, the piston rod is slidingly arranged in the main cylinder, the connecting assembly is arranged at the end of the piston rod, and the conversion piece is arranged in the main cylinder to rotate the piston rod.

[0008] In some embodiments, the conversion piece comprises a left partition plate, a right partition plate, a conversion plate and a piston plate, the piston plate is arranged at the bottom of the piston rod and abuts against the inner side wall of the main cylinder, the left partition plate and the right partition plate are arranged in the main cylinder, the conversion plate is arranged on the piston plate and connected with the piston rod, and the conversion plate abuts against the inner side wall of the main cylinder; when the piston plate abuts against the bottom of the left partition plate and the right partition plate, two closed cavities are formed, and hydraulic oil is filled into any one of the closed cavities to push the conversion plate to rotate.

[0009] In some embodiments, the connecting assembly comprises a connecting block and a limiting piece, the connecting block is provided with a connecting groove, the shutter plate is provided with a connecting plate, the end of the connecting plate is matched with the connecting groove through clamping, and the limiting piece is arranged on the connecting block to limit the position of the connecting plate.

[0010] In some embodiments, the limiting piece comprises an elastic part and a clamping bead, the connecting block is provided with a mounting groove, the mounting groove is located on the groove wall of the connecting groove, the clamping bead is arranged in the mounting groove and partially extends out of the mounting groove to abut against the connecting plate, and the elastic part is arranged in the mounting groove and abuts against the clamping bead to push the clamping bead to abut against the connecting plate.

[0011] In some embodiments, the connecting groove on the connecting block is provided with two, and the two connecting grooves are matched with the two connecting plates on both sides through clamping.

[0012] In some embodiments, the gate further comprises an auxiliary oil cylinder, the auxiliary oil cylinder is located on the other side of the gate body corresponding to the lifting and conversion assembly, and the telescopic rod of the auxiliary oil cylinder is connected with the corresponding shutter plate.

[0013] In some embodiments, the shutter plate on the same gate is provided with two, and the two shutter plates are symmetrically arranged, the conversion piece and the connecting assembly are both provided with two, the piston rod on the main hydraulic cylinder is provided with two, and the two piston rods are symmetrically arranged in the main cylinder, the two connecting assemblies are respectively arranged on the two piston rods, and the two connecting assemblies are respectively connected with the two shutter plates.

[0014] In some embodiments, the connecting assembly further comprises a locking block, the locking block is arranged on the piston rod, the locking block is provided with two fixed pin shafts, and the two connecting plates are both provided with a fixed hole at the end close to the lifting and conversion assembly, and the two fixed pin shafts are respectively inserted into the two fixed holes.

[0015] On the other hand, the application provides a cutter head comprising a cutter head body and a small-pitch parallel tool changing gate arranged on the cutter head body.

[0016] The present application provides a small-pitch parallel knife-changing gate and cutter disc. The small-pitch parallel knife-changing gate is connected in parallel through two gates, and a lifting conversion component located between the two gates is used to realize the opening and closing of the two gates respectively, thereby reducing the setting of the corresponding drive device, thereby reducing the arrangement space of adjacent gates, and reducing the spacing between the cutters on the cutter disc, so as to facilitate the arrangement of more cutters and improve the rock-breaking ability of the cutter disc; when in use, the piston rod is first extended to the top end, and the piston plate abuts against the left partition plate and the right partition plate to form the corresponding left closed chamber and the right closed chamber. Hydraulic oil is filled into the left closed chamber through the left pipeline, which can push the conversion plate to drive the piston rod to rotate toward the right. Hydraulic oil is filled into the right closed chamber through the right pipeline, which can push the conversion plate to drive the piston rod to rotate toward the left, thereby realizing that the connecting components on the piston rod are respectively connected to the gates on both sides, thereby realizing that the two gates use the same drive component and can be controlled separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 This is a schematic structural diagram of a small-pitch parallel knife-changing gate according to an embodiment of the present application;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the gate on the middle right;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the gate on the left side of the middle;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the lifting conversion component;

[0022] Figure 5 for Figure 1 Cross-section of the middle master cylinder;

[0023] Figure 6 for Figure 1 The structural diagram of the two sets of lifting conversion components;

[0024] Figure 7 for Figure 1 Schematic diagram of the structure of the connection block;

[0025] Figure 8 for Figure 1 Schematic diagram of the connection structure of the middle locking block;

[0026] Figure 9 for Figure 8Connection structure of middle locking block, top view;

[0027] Figure 10 For Figure 8 Connection structure of middle locking block, enlarged schematic view;

[0028] Figure 11 Structure schematic view of cutter head of the embodiment of the present application;

[0029] Figure 12 For Figure 1 Structure schematic view of middle right gate closed;

[0030] Figure 13 For Figure 1 Structure schematic view of middle left gate closed.

[0031] Explanation of reference signs:

[0032] 1, cutter head body; 2, normal pressure cutter; 100, connection assembly; 110, connection block; 111, connection groove; 112, installation groove; 120, limiting piece; 121, elastic part; 122, clamping bead; 130, locking block; 131, fixed pin shaft; 200, lifting conversion assembly; 210, main hydraulic cylinder; 211, main cylinder barrel; 2111, bottom pipeline; 2112, top pipeline; 212, piston rod; 220, conversion piece; 221, left partition plate; 222, right partition plate; 223, conversion plate; 224, piston plate; 225, left side closed cavity; 226, right side closed cavity; 227, left side pipeline; 228, right side pipeline; 300, gate; 310, gate body; 311, hydraulic pipeline; 320, gate plate; 321, connecting plate; 330, auxiliary oil cylinder.

[0033] Through the above-mentioned drawings, the specific embodiments of the present application have been shown, and more detailed description will be given hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0034] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers are used to indicate the same or similar components. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Rather, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0035] It should be noted that the terms "first", "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] With the development of shield machine technology, large diameter shield machine has been widely used in urban highway tunnel, cross-river highway and other large section tunnel engineering. Due to the realization of safe tool changing under normal pressure, the normal pressure cutter head has become the mainstream choice of large diameter shield cutter head.

[0039] During the propulsion process of the shield machine, the damaged or worn shield cutter and other components need to be replaced. When changing the tool, the tool is first retracted into the tool cylinder, and then the tool cylinder is closed by using the gate, so as to isolate the external pressure and carry out normal pressure tool changing operation. After the tool changing is completed, the tool is sent back to the tool cylinder, the gate is opened, and the tool is pushed out. The gate is installed on the normal pressure tool changing radial shaft, and the normal pressure tool changing radial shaft is installed on the cutter head.

[0040] Due to the limited space of the cutter head body, the large size of the tool changing device structure and other restrictions, and in order to arrange a certain number of normal pressure cutters, more cutter head radial arms need to be designed to arrange corresponding tool changing gates and other components, so that it is difficult to realize the small spacing arrangement of the cutters. At the same time, the opening rate of the cutter head is reduced, which leads to the easy formation of mud cake on the cutter head.

[0041] In order to solve the above problems, the small-spacing parallel cutter changing gate and cutter head provided by the present application are provided, the small-spacing parallel cutter changing gate is provided by two gates in parallel, and the lifting conversion assembly located between the two gates is used in common to achieve the opening and closing of the two gates respectively, thereby reducing the setting of the corresponding driving device, thereby reducing the adjacent gate arrangement space, reducing the spacing of the cutters on the cutter head, so as to arrange more cutters and improve the rock breaking capacity of the cutter head; in use, the piston rod is first driven to extend to the top end, the piston plate abuts against the left partition plate and the right partition plate to form the corresponding left closed cavity and right closed cavity, the hydraulic oil is filled into the left closed cavity through the left pipeline, the conversion plate is driven to rotate the piston rod towards the right side, the hydraulic oil is filled into the right closed cavity through the right pipeline, the conversion plate is driven to rotate the piston rod towards the left side, thereby realizing the connection of the connecting assembly on the piston rod with the two gate plates respectively, thereby realizing the common use of the two gates by the same driving member and the independent control; thereby reducing the number of cutter arrangement radial numbers, increasing the cutter head opening, and effectively reducing the problem of cutter head mud cake. After the small-spacing parallel gate is used, the normal pressure composite cutter head can also be applied to the small-diameter shield machine, thereby improving the use range of the normal pressure cutter head.

[0042] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the drawings.

[0043] In one aspect, the present application provides a small-spacing parallel cutter changing gate, referring to Figures 1 to 3 , comprising a connecting assembly 100, a lifting conversion assembly 200 and two gates 300; the two gates 300 are arranged in parallel, the gate 300 comprises a gate body 310 and a gate plate 320, the lifting conversion assembly 200 is located between the two gate bodies 310, the connecting assembly 100 is arranged on the lifting conversion assembly 200, the lifting conversion assembly 200 is used to drive the rotation of the connecting assembly 100 to connect the connecting assembly 100 with any gate plate 320, and the lifting conversion assembly 200 drives the gate plate 320 to move through the connecting assembly 100 to close or open the gate 300.

[0044] The two gates 300 are installed in parallel on the cutter head, the sliding directions of the gate plates 320 of the two gates 300 are parallel to each other, thereby enabling the two gates 300 to use one lifting conversion assembly 200 for control and to achieve the opening and closing of the two gates 300 respectively, thereby reducing the setting of the corresponding driving device, thereby reducing the adjacent gate 300 arrangement space, reducing the spacing of the cutters on the cutter head, so as to arrange more cutters and improve the rock breaking capacity of the cutter head.

[0045] Referring to Figure 2 and Figure 4 , the lifting conversion assembly 200 comprises a main hydraulic cylinder 210 and a conversion piece 220, the main hydraulic cylinder 210 comprises a main cylinder barrel 211 and a piston rod 212, the piston rod 212 is slidingly arranged in the main cylinder barrel 211, the connecting assembly 100 is arranged at the end of the piston rod 212, and the conversion piece 220 is arranged in the main cylinder barrel 211 and used for rotating the piston rod 212.

[0046] Wherein, the main cylinder barrel 211 of the main hydraulic cylinder 210 can be fixed at the side of any gate 300, and the other gate 300 is placed at the side of the main hydraulic cylinder 210. In other embodiments, the main cylinder barrel 211 of the main hydraulic cylinder 210 can also be fixed with the two gates 300 respectively, and the main cylinder barrel 211 can also be fixed on the cutter head, which is not limited here. The hydraulic pipeline 311 is arranged on the gate body 310 to provide hydraulic power for the lifting conversion assembly 200.

[0047] In an embodiment, the gate 300 is a single gate plate 320, and one gate 300 can complete the opening and closing of the gate 300.

[0048] In another embodiment, referring to Figure 2 , the gate plates 320 on the same gate 300 are provided in two, the two gate plates 320 are symmetrically arranged, the piston rods 212 on the main hydraulic cylinder 210 are provided in two, the two piston rods 212 are symmetrically arranged in the main cylinder barrel 211, the two connecting assemblies 100 are respectively arranged on the two piston rods 212, and the two connecting assemblies 100 are respectively connected with the two gate plates 320. That is, the gate 300 is a double-leaf gate 300.

[0049] The main cylinder barrels 211 in the two lifting conversion assemblies are symmetrically and integrally formed, the hydraulic pipeline 311 enters the chambers on the two sides from the middle connection, so as to synchronously push the two groups of piston rods 212 to slide, so as to facilitate the opening and closing of the gate 300.

[0050] The two groups of lifting conversion assemblies 200 are symmetrically arranged to lift and lower the two gate plates 320, so as to realize the opening and closing of the gate 300, so as to reduce the stroke of the single gate 300 through the form of the double-leaf gate 300, and then reduce the height space required by the displacement of the single gate plate 320, so as to arrange the gates 300 more closely and reduce the distance between the cutters on the cutter head.

[0051] Referring to Figure 4 , Figure 5 and Figure 6The conversion piece 220 comprises a left partition plate 221, a right partition plate 222, a conversion plate 223 and a piston plate 224. The piston plate 224 is arranged at the bottom of the piston rod 212 and abuts against the inner side wall of the main cylinder barrel 211. The left partition plate 221 and the right partition plate 222 are symmetrically arranged in the main cylinder barrel 211. The conversion plate 223 is arranged at the side of the piston plate 224 close to the piston rod 212 and connected with the piston rod 212. The side of the conversion plate 223 away from the piston rod 212 abuts against the inner side wall of the main cylinder barrel 211. When the piston plate 224 abuts against the bottom of the left partition plate 221 and the right partition plate 222, two closed cavities are formed. Hydraulic oil is filled into any one of the closed cavities to push the conversion plate 223 to rotate.

[0052] When the piston plate 224 moves to abut against the left partition plate 221 and the right partition plate 222, the left partition plate 221, the conversion plate 223 and the inner wall of the main cylinder barrel 211 form a left closed cavity 225, and the right partition plate 222, the conversion plate 223 and the inner wall of the main cylinder barrel 211 form a right closed cavity 226. The left partition plate 221 is provided with a left pipeline 227 for injecting hydraulic oil into the left closed cavity 225 to drive the conversion plate 223 to rotate in a direction away from the left partition plate 221. The right partition plate 222 is provided with a right pipeline 228 for injecting hydraulic oil into the right closed cavity 226 to drive the conversion plate 223 to rotate in a direction away from the right partition plate 222.

[0053] The piston plate 224 is fixed at the bottom of the piston rod 212 to constitute the piston of the main hydraulic cylinder 210. The left partition plate 221 and the right partition plate 222 are fixed at the top of the inner side wall of the main cylinder barrel 211 and connected with the top end cover. One side of the left partition plate 221 and the right partition plate 222 abuts against the piston rod 212. The conversion plate 223 is fixed at the side of the piston plate 224 close to the piston rod 212. One side of the conversion plate 223 is fixedly connected with the piston rod 212, and the other side abuts against the inner wall of the main cylinder barrel 211. The left partition plate 221, the right partition plate 222 and the conversion plate 223 are of the same size. When the piston plate 224 moves upward to abut against the bottom of the left partition plate 221 and the right partition plate 222 respectively, the left partition plate 221, the conversion plate 223 and the inner wall of the main cylinder barrel 211 form the left closed cavity 225, and the right partition plate 222, the conversion plate 223 and the inner wall of the main cylinder barrel 211 form the right closed cavity 226. At this time, the piston rod 212 extends to the maximum position, which drives the gate plate 320 to rise or fall to the maximum displacement, and the gate 300 is completely opened.

[0054] The left side pipeline 227 provided on the left partition plate 221 extends through the main cylinder barrel 211 to the left closed cavity 225, and is used for injecting hydraulic oil towards the left closed cavity 225 to drive the conversion plate 223 to rotate towards the direction away from the left partition plate 221. The right side pipeline 228 provided on the right partition plate 222 extends through the main cylinder barrel 211 to the right closed cavity 226, and is used for injecting hydraulic oil towards the right closed cavity 226 to drive the conversion plate 223 to rotate towards the direction away from the right partition plate 222. Thus, the rotation of the piston rod 212 is realized, so as to connect the two side brake plates 320 through the connecting assembly 100 on the piston rod 212. In the process of the rotation of the piston rod 212, the hydraulic oil at the bottom of the piston plate 224 keeps a stable pressure state to meet the formation conditions of the left closed cavity 225 and the right closed cavity 226. In addition, only one of the left side pipeline 227 and the right side pipeline 228 delivers hydraulic oil to the corresponding cavity, so as to avoid the simultaneous injection of hydraulic oil towards the left side pipeline 227 and the right side pipeline 228.

[0055] Further, the main cylinder barrel 211 is further provided with a top pipeline 2112, the top pipeline 2112 is arranged at the top of the main cylinder barrel 211, and the top pipeline 2112 is located on the side of the left partition plate 221 away from the conversion plate 223. The main cylinder barrel 211 is further provided with a bottom pipeline 2111, the bottom pipeline 2111 is arranged at the bottom of the main cylinder barrel 211 and located between the piston plate 224 and the bottom of the main cylinder barrel 211. The top pipeline 2112 and the bottom pipeline 2111 of the main cylinder barrel 211 form a hydraulic oil inlet and outlet channel for the up and down movement of the piston rod 212.

[0056] Referring to Figure 1 , Figure 6 and Figure 7 , the connecting assembly 100 comprises a connecting block 110 and a limiting piece 120. The connecting block 110 is provided with a connecting groove 111. The brake plate 320 is provided with a connecting plate 321, the end of the connecting plate 321 is clamped and matched with the connecting groove 111, and the limiting piece 120 is arranged on the connecting block 110 to limit the position of the connecting plate 321.

[0057] Further, the connecting groove 111 on the connecting block 110 is provided with two connecting grooves 111, and the two connecting grooves 111 are respectively clamped and matched with the two side connecting plates 321. The two connecting grooves 111 are respectively located on the mutually opposite sides of the connecting block 110, and the two connecting grooves 111 are isolated from each other. The two connecting grooves 111 are respectively and correspondingly clamped and matched with the two side connecting plates 321.

[0058] By adopting the above-mentioned embodiment, the piston rod 212 is rotated, the connecting block 110 is driven to rotate, the connecting groove 111 on the connecting block 110 is rotated to the end of the connecting plate 321, and the connecting plate 321 is partially clamped in the connecting groove 111, so as to realize the connection of the piston rod 212 and the gate plate 320 on one side; when it is needed to be connected with the gate plate 320 on the other side, it is only needed to reversely rotate the piston rod 212, the connecting block 110 is driven to move, the connecting plate 321 is separated from the connecting groove 111, the connecting block 110 is rotated to the connecting plate 321 on the other side, and the connecting plate 321 is connected with the corresponding connecting groove 111, so that the piston rod 212 is connected with the gate plate 320 on the two sides respectively.

[0059] Further, with reference to 6 and Figure 7 The limiting piece 120 comprises an elastic part 121 and a clamping bead 122, the connecting block 110 is provided with a mounting groove 112, the mounting groove 112 is located on the groove wall of the connecting groove 111, the clamping bead 122 is arranged in the mounting groove 112 and partially extends out of the mounting groove 112 to abut against the connecting plate 321, and the elastic part 121 is arranged in the mounting groove 112 and abuts against the clamping bead 122 to push the clamping bead 122 to abut against the connecting plate 321.

[0060] The upper and lower sides of the connecting groove 111 are provided with the mounting grooves 112, the two mounting grooves 112 are symmetrically arranged, the clamping bead 122 and the elastic part 121 are arranged in the two mounting grooves 112, the clamping bead 122 is located in the mounting groove 112 and partially leaks out of the mounting groove 112, and the end of the mounting groove 112 is closed, so that the diameter of the clamping bead 122 is greater than the outlet of the mounting groove 112, the clamping bead 122 is prevented from falling off from the mounting groove 112, and the corresponding fixing effect is also achieved.

[0061] The elastic part 121 is a spring, and in other embodiments, the elastic part 121 can also be other structures, as long as the clamping bead 122 can be popped out, and the limitation is not too much here. The end of the connecting plate 321 can also be provided with a clamping groove matched with the clamping bead 122, so as to be more conducive to the connection stability between the connecting block 110 and the connecting plate 321.

[0062] With reference to Figure 2 The gate 300 further comprises an auxiliary oil cylinder 330, the auxiliary oil cylinder 330 is located on the other side of the gate body 310 corresponding to the lifting-conversion assembly 200, and the telescopic rod of the auxiliary oil cylinder 330 is connected with the corresponding gate plate 320.

[0063] By adopting the above-mentioned embodiment, the auxiliary oil cylinder 330 and the main hydraulic cylinder 210 are synchronously moved to drive the gate plate 320 to synchronously move, so as to facilitate the opening and closing of the gate 300.

[0064] In some embodiments, with reference toFigure 8 、 Figure 9 and Figure 10 The connecting assembly 100 further comprises a locking block 130 arranged on the piston rod 212, and two fixed pin shafts 131 are arranged on the locking block 130. Two fixed holes are arranged on one end of the two connecting plates 321 close to the lifting conversion assembly 200, and the two fixed pin shafts 131 are respectively inserted into the two fixed holes.

[0065] During normal use of the cutter head, the two fixed pin shafts 131 on the locking block 130 are manually inserted into the two connecting plates 321, so as to fix the two connecting plates 321 together, and then the connection of the two shutter plates 320 on the two gates 300 is realized, so as to realize the posture fixation of the two gates 300, and the structure is simple and reliable.

[0066] On the other hand, the application provides a cutter head, referring to Figures 1 to 12 The cutter head comprises a cutter head body 1 and small-interval parallel tool changing gates 300 arranged on the cutter head body 1.

[0067] A plurality of normal-pressure cutters 2 and a plurality of normal-pressure tool changing radial arms are installed on the cutter head body 1, wherein the gates 300, the main hydraulic cylinder 210 and the auxiliary hydraulic cylinder are all installed on the normal-pressure tool changing radial arms. In the application, the two gates 300 are connected in parallel, and share a set of lifting conversion assemblies 200, so as to reduce the number of hydraulic cylinders, and then reduce the number of normal-pressure tool changing radial arms, which is beneficial to increase the opening of the cutter head and effectively reduce the problem of mud cake of the cutter head. At the same time, the space arrangement of adjacent gates 300 is reduced, the cutter tool spacing of the cutter head is reduced, and the rock breaking capacity of the normal-pressure composite cutter head is improved; and the normal-pressure cutter head can be applied to a small-diameter shield machine, thereby improving the use range of the normal-pressure cutter head.

[0068] In the application, the small-interval parallel tool changing gates 300 in the embodiment have the same structure as the small-interval parallel tool changing gates 300 provided in any one of the above embodiments, and can bring the same or similar technical effects, which will not be described here again. For details, refer to the description of the above embodiments.

[0069] Referring to Figures 1 to 13 The specific operation process is as follows:

[0070] 1. During the operation of the cutter head, the gates 300 are in an open state, and the positions of the gates 300 are relatively fixed. The fixed pin shafts 131 on the locking block 130 are respectively inserted into the fixed holes of the connecting plates 321, the locking block 130 is fixed on the end of the piston rod 212 through a nut, and then the relative positions of the two gates 300 are locked.

[0071] 2. During the maintenance of the normal-pressure cutters 2 in front of the gates 300, the corresponding gates 300 need to be closed to isolate the pressure of the working face.

[0072] 3. Take out the end nut of the piston rod 212, remove the locking block 130, and release the position locking.

[0073] 4. Control the hydraulic pipeline 311, and let the hydraulic oil enter the main cylinder 211 from the bottom, so that the piston rod 212 keeps the fully extended state, maintains the pressure in the main cylinder 211, and prevents the piston rod 212 from retreating when the connecting block 110 rotates.

[0074] 5. When it is needed to close the right gate 300, the hydraulic oil enters the left sealed cavity 225 from the left pipeline 227, acts on the conversion plate 223, and then drives the piston rod 212 and the connecting block 110 to rotate rightward, so that the connecting plate 321 is located in the corresponding connecting groove 111, and the clamping bead 122 is pushed to compress the spring, so that the clamping bead 122 fixes the connecting plate 321, and the connection between the connecting block 110 and the gate 300 is realized. When it is needed to close the left gate 300, the hydraulic oil enters the right sealed cavity 226 from the right pipeline 228, acts on the conversion plate 223, and then drives the piston rod 212 and the connecting block 110 to rotate leftward, so that the connecting plate 321 is located in the corresponding connecting groove 111, and the clamping bead 122 is pushed to compress the spring, so that the clamping bead 122 fixes the connecting plate 321, and the connection between the connecting block 110 and the gate 300 is realized.

[0075] 6. Control the hydraulic oil to enter the main cylinder 211 from the top pipeline 2112, and let the hydraulic oil at the bottom of the main cylinder 211 flow out. The hydraulic oil is separated by the left partition plate 221 and the right partition plate 222, and does not affect the rotation angle of the piston rod 212; the oil pressure acts on the piston plate 224, so that the piston rod 212 is retracted, and the auxiliary oil cylinder 330 is synchronously retracted, together driving the gate plate 320 to close, and closing the gate 300.

[0076] 7. After the gate 300 is closed, the cutter barrel is drawn out for cutter maintenance work; after the maintenance work is completed, the gate 300 needs to be opened, and the cutter is installed to the working position.

[0077] 8. Control the hydraulic pipeline 311, and let the hydraulic oil enter the main cylinder 211, and let the hydraulic oil above the piston plate 224 flow out from the top pipeline 2112, so that the piston rod 212 is extended; at the same time, the auxiliary oil cylinder 330 is synchronously extended, together driving the gate plate 320 to open, and opening the gate 300.

[0078] 9. The cutter barrel cutter after the maintenance is extended to the specified position.

[0079] 10. Finally, the connecting block 110 is rotated to the middle position, the fixing pin shaft 131 on the locking block 130 is respectively inserted into the fixing hole on the connecting plate 321 of the two gates 300, the locking block 130 and the end of the piston rod 212 are fixed by the nut, and then the relative positions of the two gates 300 are locked, and the normal-pressure cutter changing work of the corresponding gate 300 is completed.

[0080] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0081] It is to be understood that the application is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various changes in form and detail can be made therein without departing from the scope thereof. The scope of the application is limited only by the claims which follow.

Claims

1. A small-pitch parallel knife-changing gate, characterized in that: The invention comprises a connecting component (100), a lifting conversion component (200) and two gates (300); the gates (300) comprise gate bodies (310) and gate plates (320); the lifting conversion component (200) is located between the two gate bodies (310); the connecting component (100) is arranged on the lifting conversion component (200); the lifting conversion component (200) is used to drive the connecting component (100) to rotate so that the connecting component (100) is connected to any one of the gate plates (320); the lifting conversion component (200) then drives the gate plates (320) to move through the connecting component (100) so that the gates (300) are closed or opened; The lifting conversion assembly (200) includes a main hydraulic cylinder (210) and a conversion member (220). The main hydraulic cylinder (210) includes a main cylinder barrel (211) and a piston rod (212). The piston rod (212) is slidably arranged in the main cylinder barrel (211). The connecting assembly (100) is arranged at the end of the piston rod (212). The conversion member (220) is arranged in the main cylinder barrel (211) for rotating the piston rod (212).

2. The small-pitch parallel knife-changing gate according to claim 1, characterized in that: The conversion member (220) includes a left partition plate (221), a right partition plate (222), a conversion plate (223) and a piston plate (224). The piston plate (224) is arranged at the bottom of the piston rod (212) and abuts against the inner wall of the main cylinder (211). The left partition plate (221) and the right partition plate (222) are both arranged in the main cylinder (211). The conversion plate (223) is arranged on the piston plate (224) and connected to the piston rod (212). The conversion plate (223) abuts against the inner wall of the main cylinder (211). When the piston plate (224) abuts against the bottom of the left partition plate (221) and the right partition plate (222), two closed cavities are formed. Hydraulic oil is filled into any one of the closed cavities to drive the conversion plate (223) to rotate.

3. The small-pitch parallel knife-changing gate according to claim 1, characterized in that: The connecting assembly (100) comprises a connecting block (110) and a limiting member (120); a connecting groove (111) is provided on the connecting block (110); a connecting plate (321) is provided on the gate plate (320); an end of the connecting plate (321) is snap-fitted with the connecting groove (111); and the limiting member (120) is provided on the connecting block (110) to limit the position of the connecting plate (321).

4. The small-pitch parallel knife-changing gate according to claim 3, characterized in that: The limiting member (120) comprises an elastic portion (121) and a clamping bead (122); a mounting groove (112) is provided on the connecting block (110); the mounting groove (112) is located on the groove wall of the connecting groove (111); the clamping bead (122) is arranged in the mounting groove (112) and partially extends outside the mounting groove (112) to abut against the connecting plate (321); the elastic portion (121) is arranged in the mounting groove (112) to abut against the clamping bead (122) to push the clamping bead (122) to abut against the connecting plate (321).

5. The small-pitch parallel knife-changing gate according to claim 3, characterized in that: There are two connection slots (111) on the connection block (110), and the two connection slots (111) are respectively engaged with the connection plates (321) on both sides.

6. The small-pitch parallel knife-changing gate according to any one of claims 1 to 5, characterized in that: The gate (300) further comprises an auxiliary oil cylinder (330), which is located on the other side of the gate body (310) corresponding to the lifting conversion assembly (200), and the telescopic rod of the auxiliary oil cylinder (330) is connected to the corresponding gate plate (320).

7. The small-pitch parallel knife-changing gate according to any one of claims 1 to 5, characterized in that: The number of gate plates (320) on the same gate (300) is two, and the two gate plates (320) are symmetrically arranged. The number of conversion members (220) and connecting assemblies (100) is two, and the number of piston rods (212) on the master hydraulic cylinder (210) is two, and the two piston rods (212) are symmetrically arranged in the master cylinder barrel (211). The two connecting assemblies (100) are respectively arranged on the two piston rods (212), and the two connecting assemblies (100) are respectively connected to the two gate plates (320).

8. The small-pitch parallel knife-changing gate according to claim 3, characterized in that: The connecting assembly (100) further comprises a locking block (130), wherein the locking block (130) is arranged on the piston rod (212), and two fixing pins (131) are arranged on the locking block (130), and fixing holes are respectively provided at one end of the two connecting plates (321) close to the lifting conversion assembly (200), and the two fixing pins (131) are respectively inserted into the two fixing holes.

9. A cutter head, characterized in that: The invention comprises a cutter disc body (1) and a small-pitch parallel cutter-changing gate as claimed in any one of claims 1 to 8, which is arranged on the cutter disc body (1).

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