A ring-shaped rotary joint application device for a closed environment of a heading machine

Abstract

The utility model discloses a kind of annular rotary joint application devices for heading machine closed environment, including mounting seat, drum, fixed inner shell, rotating shell and speed reducer;Two the mounting seat is respectively arranged at the both ends of drum and forms rotatable structure;Two the fixed inner shell is respectively connected with two mounting seat fixed, and all be equipped with liquid inlet and liquid outlet;Two the rotating shell is respectively with the way of self-rotating and covered in two fixed inner shell outer, and with two fixed inner shell all form the liquid inlet sealing cavity that does not communicate with each other and the liquid outlet sealing cavity, to be connected with two liquid inlet, two liquid outlet respectively;Two the speed reducer is respectively connected with two rotating shell and coaxial rotation structure, and all be equipped with cooling device, to be connected with two liquid inlet sealing cavity, two liquid outlet sealing cavity connection respectively;Above scheme structure is simple, sealing is good, and easy to maintain, practically solve the various deficiencies existing in prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of tunneling machines, and in particular to an annular rotary joint application device for use in the closed environment of tunneling machines. Background Technology

[0002] A rotary join, also known as a rotary fluid joint, rotary sealing joint, or rotary adapter, is a key mechanical device used to enable the transfer of fluids (liquids, gases, or vapors) between stationary pipelines and rotating equipment. The core challenge lies in maintaining continuous fluid delivery while preventing leakage and wear under high-speed rotation. Rotary joins are widely used in industrial automation, energy, chemical, aerospace, and high-end manufacturing industries.

[0003] In the operating environment of tunneling machines, due to high-speed rotation, the requirements for the sealing and wear resistance of rotary joints are high. It is necessary to ensure fluid transmission while preventing external dust, coal dust and other impurities from entering the equipment, and also to avoid internal coolant leakage that could cause environmental pollution and equipment damage.

[0004] Current problems with rotary joints:

[0005] 1. Limited applicability: Traditional rotary joints are generally used to rotate around their own axis and are not suitable for the cooling and heat dissipation system of tunneling machines, because the rotary joint of a tunneling machine needs to rotate not only around its own axis, but also around the axis of the reducer.

[0006] 2. Complex structure and inconvenient maintenance: Existing rotary joints are mostly assembled from multiple parts, which increases the difficulty of assembly in the limited space of the tunneling machine. Moreover, once a failure occurs, the maintenance space is small and disassembly is cumbersome, which affects the normal operating efficiency of the tunneling machine. Utility Model Content

[0007] The purpose of this utility model is to provide an annular rotary joint application device for use in the closed environment of tunneling, which has many advantages such as simple structure, good sealing performance and easy maintenance.

[0008] To solve the above-mentioned technical problems, this utility model provides an application device for a circular rotary joint in a confined environment during tunneling, including a mounting base, a roller, a fixed inner shell, a rotating outer shell, and a reducer; two mounting bases are respectively disposed at both ends of the roller; both ends of the roller are respectively sleeved on the two mounting bases, and the two ends of the roller are respectively sleeved with the two mounting bases in a rotatable structure; both fixed inner shells are disposed within the space surrounded by the roller, and both fixed inner shells are respectively connected and fixed to the two mounting bases, and both fixed inner shells are provided with a liquid inlet and a liquid outlet; both rotating outer shells are... The rotating outer shells are each rotatably fitted over the two fixed inner shells. The two rotating outer shells and the two fixed inner shells enclose and form mutually non-communicating liquid inlet sealing cavities and liquid outlet sealing cavities. The two liquid inlet sealing cavities are respectively connected to the two liquid inlets, and the two liquid outlet sealing cavities are respectively connected to the two liquid outlets. The two reducers are respectively connected to the two rotating outer shells in a coaxial rotating structure. The two reducers are each equipped with a cooling device. The liquid inlet pipes of the two cooling devices are respectively connected to the two liquid inlet sealing cavities, and the liquid outlet pipes of the two cooling devices are respectively connected to the two liquid outlet sealing cavities.

[0009] In one embodiment, the fixed inner shell includes an annular inner shell base plate and an annular inner shell wall plate connected to each other; the annular inner shell base plate is provided with a liquid outlet that passes through it; the annular inner shell wall plate is arranged around the outer periphery of the annular inner shell base plate, and the annular inner shell wall plate is provided with a liquid inlet that passes through it; the rotating outer shell includes an annular outer shell base plate and an annular outer shell wall plate connected to each other; the annular outer shell base plate and the annular inner shell base plate are fitted together and abut against each other, and the annular outer shell base plate and the annular inner shell base plate enclose and form an annular liquid outlet sealing cavity; the annular outer shell wall plate and the annular inner shell wall plate are fitted together and abut against each other, and the annular outer shell wall plate and the annular inner shell wall plate enclose and form an annular liquid inlet sealing cavity.

[0010] In one embodiment, the surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut each other are respectively provided with an annular groove for the inner shell bottom plate and an annular groove for the outer shell bottom plate. The annular grooves of the inner shell bottom plate and the annular grooves of the outer shell bottom plate are joined together to form an annular liquid outlet sealing cavity. The surfaces of the annular inner shell wall plate and the annular outer shell wall plate that abut each other are respectively provided with an annular groove for the inner shell wall plate and an annular groove for the outer shell wall plate. The annular grooves of the inner shell wall plate and the annular grooves of the outer shell wall plate are joined together to form an annular liquid inlet sealing cavity.

[0011] In one embodiment, the surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut against each other form a first bottom plate annular sealing cavity and a second bottom plate annular sealing cavity; the first bottom plate annular sealing cavity surrounds the liquid outlet sealing cavity, and a first bottom plate annular sealing ring is provided inside the first bottom plate annular sealing cavity; the second bottom plate annular sealing cavity is located within the space surrounded by the liquid outlet sealing cavity, and a second bottom plate annular sealing ring is provided inside the second bottom plate annular sealing cavity.

[0012] In one embodiment, the surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut each other are respectively provided with a first annular sealing groove for the inner shell bottom plate and a first annular sealing groove for the outer shell bottom plate. The first annular sealing groove for the inner shell bottom plate and the first annular sealing groove for the outer shell bottom plate are spliced ​​together to form a first annular sealing cavity for the bottom plate. The surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut each other are also respectively provided with a second annular sealing groove for the inner shell bottom plate and a second annular sealing groove for the outer shell bottom plate. The second annular sealing groove for the inner shell bottom plate and the second annular sealing groove for the outer shell bottom plate are spliced ​​together to form a second annular sealing cavity for the bottom plate.

[0013] In one embodiment, one side of the contact surface of the annular inner shell bottom plate and the annular outer shell bottom plate is provided with an array of bottom plate annular sealing grooves, and the other side of the contact surface is provided with an array of bottom plate annular sealing strips. The array of bottom plate annular sealing strips is embedded in the array of bottom plate annular sealing grooves and does not abut against each other. The array of bottom plate annular sealing grooves and the array of bottom plate annular sealing strips are both located within the space surrounded by the second bottom plate annular sealing cavity.

[0014] In one embodiment, one side of the abutting surface of the annular inner shell bottom plate and the annular outer shell bottom plate is provided with an annular guide groove, and the other side of the abutting surface is provided with an annular guide strip. The annular guide strip is embedded in the annular guide groove to form a sliding connection, and both the annular guide groove and the annular guide strip surround the first annular sealing cavity of the bottom plate.

[0015] In one embodiment, the surfaces of the inner and outer ring walls that abut each other form an annular sealing cavity. The annular sealing cavity is located on the side of the liquid inlet sealing cavity away from the bottom plate of the annular outer shell, and an annular sealing ring is provided inside the annular sealing cavity.

[0016] In one embodiment, the surfaces of the inner and outer annular shell panels that abut each other are respectively provided with an annular sealing groove for the inner shell panel and an annular sealing groove for the outer shell panel, and the annular sealing groove for the inner shell panel and the annular sealing groove for the outer shell panel are joined together to form the annular sealing cavity of the panel.

[0017] In one embodiment, one side of the abutting surface of the annular inner shell wall panel and the annular outer shell wall panel is provided with an array of annular sealing grooves, and the other side of the abutting surface is provided with an array of annular sealing strips. The array of annular sealing strips is embedded in the array of annular sealing grooves and does not abut against each other. The array of annular sealing grooves and the array of annular sealing strips are both located on the side of the annular sealing cavity away from the bottom plate of the annular outer shell.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. Based on the adaptation problem of the closed environment of the tunneling machine, the rotary joint adopts a circular cavity design, which allows the rotating shell to rotate around its own axis and also revolve around the external axis with the reducer. The rotation of the rotating shell not only facilitates the circulation of coolant, but also significantly improves the overall performance of the cooling device.

[0020] 2. To address the wear problem of the reducer during high-speed rotation, the rotary joint utilizes the array of annular sealing strips on the base plate embedded in the array of annular sealing grooves on the base plate without contacting each other, and the array of annular sealing strips on the wall plate embedded in the array of annular sealing grooves on the wall plate without contacting each other, thereby forming a non-contact sealing treatment. Without affecting the sealing performance, it reduces the contact wear of hard friction pairs and improves the sealing life of the rotary joint.

[0021] 3. Because the elasticity of the first base plate annular seal and the second base plate annular seal can constrain the radial displacement of the rotating housing, no additional bearing positioning is required. Therefore, the overall structure of the device will become simpler, and the size and installation space required will become more suitable, making it more suitable for the gearbox to work for a long time in a closed rotating environment. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional structural schematic diagram provided in an embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the assembly structure of the fixed inner shell and the rotating outer shell;

[0025] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure;

[0026] Figure 4 yes Figure 3 A magnified schematic diagram of a local structure;

[0027] Figure 5 yes Figure 4 A magnified structural diagram of part A;

[0028] Figure 6 yes Figure 5 A magnified structural diagram of part C;

[0029] Figure 7 yes Figure 4 A magnified structural diagram of part B.

[0030] The attached figures are labeled as follows:

[0031] 100. Mounting base;

[0032] 200. Roller;

[0033] 300. Fixed inner shell; 310. Annular inner shell bottom plate; 320. Annular inner shell wall plate; 330. Annular groove of inner shell bottom plate; 340. Annular groove of inner shell wall plate; 351. Annular sealing groove of first inner shell bottom plate; 352. Annular sealing groove of second inner shell bottom plate; 360. Annular sealing groove of inner shell wall plate; 371. Liquid inlet; 372. Liquid outlet;

[0034] 400. Rotating outer shell; 410. Annular outer shell base plate; 420. Annular outer shell wall plate; 430. Annular groove in the outer shell base plate; 440. Annular groove in the outer shell wall plate; 451. Annular sealing groove in the first outer shell base plate; 452. Annular sealing groove in the second outer shell base plate; 460. Annular sealing groove in the outer shell wall plate.

[0035] 500. Reducer; 510. Cooling device; 511. Liquid inlet pipe; 512. Liquid outlet pipe;

[0036] 610. Liquid inlet sealing chamber; 620. Liquid outlet sealing chamber;

[0037] 710. First base plate annular sealing cavity; 711. First base plate annular sealing ring; 720. Second base plate annular sealing cavity; 721. Second base plate annular sealing ring; 730. Wall plate annular sealing cavity; 731. Wall plate annular sealing ring;

[0038] 810. Array of annular sealing strips on the base plate; 820. Array of annular sealing grooves on the base plate; 830. Array of annular sealing strips on the wall panel; 840. Array of annular sealing grooves on the wall panel;

[0039] 910. Annular guide groove on the base plate; 920. Annular guide strip on the base plate. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0041] This utility model provides an application device for a circular rotary joint in a sealed environment during tunneling, the implementation of which is as follows: Figures 1 to 3 As shown, the device includes a mounting base 100, a roller 200, a fixed inner shell 300, a rotating outer shell 400, and a reducer 500. Two mounting bases 100 are respectively located at both ends of the roller 200. The two ends of the roller 200 are respectively fitted over the two mounting bases 100, and the two ends of the roller 200 are rotatably connected to the two mounting bases 100. Two fixed inner shells 300 are located within the space enclosed by the roller 200, and are respectively connected and fixed to the two mounting bases 100. Each fixed inner shell 300 has a liquid inlet 371 and a liquid outlet 372. Two rotating outer shells 400 are respectively fitted over the two mounting bases 100 in a self-rotating manner. Outside the fixed inner shell 300, the two rotating outer shells 400 and the two fixed inner shells 300 each enclose a liquid inlet sealing cavity 610 and a liquid outlet sealing cavity 620 that are not interconnected. The two liquid inlet sealing cavities 610 are respectively connected to the two liquid inlets 371, and the two liquid outlet sealing cavities 620 are respectively connected to the two liquid outlets 372. The two reducers 500 are respectively connected to the two rotating outer shells 400 in a coaxial rotating structure. The two reducers 500 are each equipped with a cooling device 510. The liquid inlet pipes 511 of the two cooling devices 510 are respectively connected to the two liquid inlet sealing cavities 610, and the liquid outlet pipes 512 of the two cooling devices 510 are respectively connected to the two liquid outlet sealing cavities 620.

[0042] During application, the coolant can be delivered to the inlet sealing chamber 610 through the inlet 371 to absorb heat. After absorbing heat, the coolant flows from the inlet sealing chamber 610 to the cooling device 510, which can then use the coolant to cool the reducer 500. Finally, the coolant will be output through the outlet sealing chamber 620. By repeating the above process, the device can be cooled.

[0043] Obviously, the rotary joint in this embodiment adopts a circular cavity design to adapt to the closed environment of the tunneling machine, so that the rotary housing 400 can rotate around its own axis and also revolve around the external axis with the reducer 500 as a whole. Moreover, the rotation of the rotary housing 400 not only facilitates the circulation of coolant, but also significantly improves the overall performance of the cooling device 510.

[0044] like Figure 2 and Figure 3As shown, in this embodiment, the fixed inner shell 300 includes an annular inner shell bottom plate 310 and an annular inner shell wall plate 320 connected to each other; the annular inner shell bottom plate 310 is provided with a liquid outlet 372 through which it passes; the annular inner shell wall plate 320 is arranged around the outer periphery of the annular inner shell bottom plate 310, and is provided with a liquid inlet 371 through which it passes; the rotating outer shell 400 includes an annular outer shell bottom plate connected to each other. Plate 410 and annular outer shell wall plate 420; the annular outer shell bottom plate 410 and the annular inner shell bottom plate 310 are fitted and abutted against each other, and the annular outer shell bottom plate 410 and the annular inner shell bottom plate 310 enclose and form an annular liquid outlet sealing cavity 620; the annular outer shell wall plate 420 and the annular inner shell wall plate 320 are fitted and abutted against each other, and the annular outer shell wall plate 420 and the annular inner shell wall plate 320 enclose and form an annular liquid inlet sealing cavity 610.

[0045] With this configuration, the inlet sealing chamber 610 and the outlet sealing chamber 620 can be located in different spaces, thereby ensuring that the inlet sealing chamber 610 can achieve independent input of coolant and the outlet sealing chamber 620 can achieve independent output of coolant.

[0046] like Figure 3 and Figure 4 As shown, in this embodiment, the surfaces of the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 that abut each other are respectively provided with an annular groove 330 for the inner shell bottom plate and an annular groove 430 for the outer shell bottom plate. The annular groove 330 for the inner shell bottom plate and the annular groove 430 for the outer shell bottom plate are spliced ​​together to form an annular liquid outlet sealing cavity 620. The surfaces of the annular inner shell wall plate 320 and the annular outer shell wall plate 420 that abut each other are respectively provided with an annular groove 340 for the inner shell wall plate and an annular groove 440 for the outer shell wall plate. The annular groove 340 for the inner shell wall plate and the annular groove 440 for the outer shell wall plate are spliced ​​together to form an annular liquid inlet sealing cavity 610.

[0047] With this configuration, as long as the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 are aligned and abutted against each other, the liquid inlet sealing cavity 610 and the liquid outlet sealing cavity 620 can be enclosed and formed. This not only simplifies the processing but also makes assembly and disassembly more convenient.

[0048] like Figure 4 and Figure 5 As shown, in this embodiment, the surfaces where the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 abut together form a first bottom plate annular sealing cavity 710 and a second bottom plate annular sealing cavity 720. The first bottom plate annular sealing cavity 710 surrounds the liquid outlet sealing cavity 620, and a first bottom plate annular sealing ring 711 is provided inside the first bottom plate annular sealing cavity 710. The second bottom plate annular sealing cavity 720 is located in the space surrounded by the liquid outlet sealing cavity 620, and a second bottom plate annular sealing ring 721 is provided inside the second bottom plate annular sealing cavity 720.

[0049] With this configuration, the liquid outlet sealing cavity 620 can be sealed using the first bottom plate annular sealing ring 711 and the second bottom plate annular sealing ring 721, thereby further enhancing the sealing performance of the liquid outlet sealing cavity 620.

[0050] like Figure 5 As shown, in this embodiment, the surfaces of the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 that abut against each other are respectively provided with a first annular sealing groove 351 for the inner shell bottom plate and a first annular sealing groove 451 for the outer shell bottom plate. The first annular sealing groove 351 for the inner shell bottom plate and the first annular sealing groove 451 for the outer shell bottom plate are spliced ​​together to form a first bottom plate annular sealing cavity 710. The surfaces of the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 that abut against each other are also respectively provided with a second annular sealing groove 352 for the inner shell bottom plate and a second annular sealing groove 452 for the outer shell bottom plate. The second annular sealing groove 352 for the inner shell bottom plate and the second annular sealing groove 452 for the outer shell bottom plate are spliced ​​together to form a second bottom plate annular sealing cavity 720.

[0051] With this configuration, as long as the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 are aligned and abutted against each other, the first bottom plate annular sealing cavity 710 and the second bottom plate annular sealing cavity 720 can be formed. This not only simplifies the processing but also makes assembly and disassembly more convenient.

[0052] like Figure 5 and Figure 6 As shown, in this embodiment, the surface of the annular inner shell bottom plate 310 that abuts against the annular outer shell bottom plate 410 is provided with a bottom plate annular sealing strip array 810, and the surface of the annular outer shell bottom plate 410 that abuts against the annular inner shell bottom plate 310 is provided with a bottom plate annular sealing groove array 820. The bottom plate annular sealing strip array 810 is embedded in the bottom plate annular sealing groove array 820 and does not abut against each other. The bottom plate annular sealing groove array 820 and the bottom plate annular sealing strip array 810 are both located within the space surrounded by the second bottom plate annular sealing cavity 720.

[0053] The aforementioned bottom plate annular sealing groove array 820 is essentially composed of multiple annular sealing grooves arranged separately along a straight line, and the bottom plate annular sealing strip array 810 is essentially composed of multiple annular sealing strips arranged separately along a straight line.

[0054] Therefore, after adopting this setting, multiple annular sealing strips will be embedded in multiple annular sealing grooves respectively, and there is no contact between the multiple annular sealing strips and the multiple annular sealing grooves. This setting allows the two to form a non-contact sealing treatment, which reduces the contact wear between the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 without affecting the sealing performance, and improves the sealing life of the rotary joint.

[0055] It should be noted that the arrangement of the bottom plate annular sealing strip array 810 and the bottom plate annular sealing groove array 820 is not limited to the above-mentioned arrangement. It is only necessary to ensure that one side of the abutting surface of the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 is provided with the bottom plate annular sealing groove array 820, and the other side of the abutting surface is provided with the bottom plate annular sealing strip array 810.

[0056] like Figure 5 As shown, in this embodiment, the surface of the annular inner shell bottom plate 310 that abuts against the annular outer shell bottom plate 410 is provided with a bottom plate annular guide groove 910, and the surface of the annular outer shell bottom plate 410 that abuts against the annular inner shell bottom plate 310 is provided with a bottom plate annular guide strip 920. The bottom plate annular guide strip 920 is embedded in the bottom plate annular guide groove 910 to form a sliding connection. The bottom plate annular guide groove 910 and the bottom plate annular guide strip 920 are both surrounded outside the first bottom plate annular sealing cavity 710.

[0057] With this configuration, the assembly of the bottom plate annular guide strip 920 and the bottom plate annular guide groove 910 not only limits the rotation trajectory of the rotating housing 400 and ensures that the installation of the rotating housing 400 is stable and secure, but also achieves a certain sealing function.

[0058] It should be noted that the arrangement of the bottom plate annular guide strip 920 and the bottom plate annular guide groove 910 is not limited to the above arrangement. It is only necessary to ensure that one side of the abutting surface of the annular inner shell bottom plate 310 and the annular outer shell bottom plate 410 is provided with the bottom plate annular guide groove 910, and the other side of the abutting surface is provided with the bottom plate annular guide strip 920.

[0059] like Figure 3 , Figure 4 and Figure 7 As shown, in this embodiment, the surfaces of the annular inner shell wall plate 320 and the annular outer shell wall plate 420 that abut against each other are enclosed to form an annular sealing cavity 730. The annular sealing cavity 730 is located on the side of the liquid inlet sealing cavity 610 away from the bottom plate 410 of the annular outer shell, and an annular sealing ring 731 is provided inside the annular sealing cavity 730.

[0060] With this configuration, the wall panel annular sealing ring 731 can be used to seal the liquid inlet sealing cavity 610, thereby further enhancing the sealing performance of the liquid inlet sealing cavity 610.

[0061] like Figure 7 As shown, in this embodiment, the surfaces of the inner shell wall panel 320 and the outer shell wall panel 420 that abut against each other are respectively provided with an inner shell wall panel annular sealing groove 360 ​​and an outer shell wall panel annular sealing groove 460. The inner shell wall panel annular sealing groove 360 ​​and the outer shell wall panel annular sealing groove 460 are spliced ​​together to form a wall panel annular sealing cavity 730.

[0062] With this configuration, as long as the annular inner shell wall panel 320 and the annular outer shell wall panel 420 are aligned and abutted against each other, an annular sealing cavity 730 can be formed, which not only simplifies the processing but also makes assembly and disassembly more convenient.

[0063] like Figure 3 and Figure 7 As shown, in this embodiment, the surface of the annular inner shell wall panel 320 that abuts against the annular outer shell wall panel 420 is provided with an annular sealing strip array 830, and the surface of the annular outer shell wall panel 420 that abuts against the annular inner shell wall panel 320 is provided with an annular sealing groove array 840. The annular sealing strip array 830 is embedded in the annular sealing groove array 840 and does not abut against each other. The annular sealing groove array 840 and the annular sealing strip array 830 are both located on the side of the annular sealing cavity 730 away from the annular outer shell bottom plate 410.

[0064] The aforementioned wall panel annular sealing groove array 840 is essentially composed of multiple annular sealing grooves arranged separately along a straight line, and the wall panel annular sealing strip array 830 is essentially composed of multiple annular sealing strips arranged separately along a straight line.

[0065] Therefore, after adopting this setting, multiple annular sealing strips will be embedded in multiple annular sealing grooves respectively, and there is no contact between the multiple annular sealing strips and the multiple annular sealing grooves. This setting allows the two to form a non-contact sealing treatment, which reduces the contact wear between the annular inner shell wall plate 320 and the annular outer shell wall plate 420 without affecting the sealing performance, and improves the sealing life of the rotary joint.

[0066] It should be noted that the arrangement of the wall panel annular sealing strip array 830 and the wall panel annular sealing groove array 840 is not limited to the above-mentioned arrangement. It is only necessary to ensure that one side of the abutting surface of the annular inner shell wall panel 320 and the annular outer shell wall panel 420 is provided with the wall panel annular sealing groove array 840, and the other side of the abutting surface is provided with the wall panel annular sealing strip array 830.

[0067] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A circular rotary joint application device for use in a confined environment during tunneling, characterized in that, Includes mounting base, roller, fixed inner shell, rotating outer shell and reducer; The two mounting bases are respectively located at both ends of the roller; The two ends of the roller are respectively sleeved on the two mounting seats, and the two ends of the roller are respectively sleeved on the two mounting seats in a rotatable structure; Both of the fixed inner shells are located within the space surrounded by the roller, and the two fixed inner shells are respectively connected and fixed to the two mounting bases. Both fixed inner shells are provided with a liquid inlet and a liquid outlet. Both of the rotating outer shells are respectively fitted onto the two fixed inner shells in a rotatable manner. The two rotating outer shells and the two fixed inner shells enclose and form a liquid inlet sealing cavity and a liquid outlet sealing cavity that are not interconnected. The two liquid inlet sealing cavities are respectively connected to the two liquid inlets, and the two liquid outlet sealing cavities are respectively connected to the two liquid outlets. The two reducers are respectively connected to the two rotating housings in a coaxial rotating structure. Both reducers are equipped with cooling devices. The inlet pipes of the two cooling devices are respectively connected to the two inlet sealing cavities, and the outlet pipes of the two cooling devices are respectively connected to the two outlet sealing cavities.

2. The circular rotary joint application device according to claim 1, characterized in that, The fixed inner shell includes an annular inner shell bottom plate and an annular inner shell wall plate that are connected to each other; The bottom plate of the annular inner shell is provided with the liquid outlet that passes through it; The annular inner shell wall plate is arranged around the outer periphery of the annular inner shell bottom plate, and the annular inner shell wall plate is provided with the liquid inlet that passes through it; The rotating outer shell includes an annular outer shell base plate and an annular outer shell wall plate that are connected to each other; The annular outer shell bottom plate and the annular inner shell bottom plate are fitted and abut against each other, and the annular outer shell bottom plate and the annular inner shell bottom plate enclose and form an annular liquid outlet sealing cavity; The annular outer shell wall panel and the annular inner shell wall panel are fitted and abutted against each other, and the annular outer shell wall panel and the annular inner shell wall panel enclose and form an annular liquid inlet sealing cavity.

3. The circular rotary joint application device according to claim 2, characterized in that, The surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut against each other are respectively provided with an annular groove for the inner shell bottom plate and an annular groove for the outer shell bottom plate. The annular grooves of the inner shell bottom plate and the annular grooves of the outer shell bottom plate are spliced ​​together to form an annular liquid outlet sealing cavity. The surfaces of the inner and outer ring wall panels that abut each other are respectively provided with an annular groove for the inner ring wall panel and an annular groove for the outer ring wall panel. The annular grooves of the inner and outer ring wall panels are joined together to form an annular liquid inlet sealing cavity.

4. The circular rotary joint application device according to claim 2, characterized in that, The surfaces where the annular inner shell bottom plate and the annular outer shell bottom plate abut each other enclose a first bottom plate annular sealing cavity and a second bottom plate annular sealing cavity. The first bottom plate annular sealing cavity surrounds the liquid outlet sealing cavity, and the first bottom plate annular sealing ring is provided inside the first bottom plate annular sealing cavity; The second bottom plate annular sealing cavity is located within the space surrounded by the liquid outlet sealing cavity, and the second bottom plate annular sealing ring is provided inside the second bottom plate annular sealing cavity.

5. The circular rotary joint application device according to claim 4, characterized in that, The surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut against each other are respectively provided with a first annular sealing groove for the inner shell bottom plate and a first annular sealing groove for the outer shell bottom plate. The first annular sealing groove for the inner shell bottom plate and the first annular sealing groove for the outer shell bottom plate are spliced ​​together to form a first annular sealing cavity for the bottom plate. The surfaces of the annular inner shell bottom plate and the annular outer shell bottom plate that abut against each other are respectively provided with a second annular sealing groove for the inner shell bottom plate and a second annular sealing groove for the outer shell bottom plate. The second annular sealing groove for the inner shell bottom plate and the second annular sealing groove for the outer shell bottom plate are spliced ​​together to form a second annular sealing cavity for the bottom plate.

6. The circular rotary joint application device according to claim 4, characterized in that, One side of the contact surface of the annular inner shell bottom plate and the annular outer shell bottom plate is provided with an array of bottom plate annular sealing grooves, and the other side of the contact surface is provided with an array of bottom plate annular sealing strips. The array of bottom plate annular sealing strips is embedded in the array of bottom plate annular sealing grooves and does not abut against each other. The array of bottom plate annular sealing grooves and the array of bottom plate annular sealing strips are both located within the space surrounded by the second bottom plate annular sealing cavity.

7. The circular rotary joint application device according to claim 4, characterized in that, One side of the contact surface of the annular inner shell bottom plate and the annular outer shell bottom plate is provided with an annular guide groove, and the other side of the contact surface is provided with an annular guide strip. The annular guide strip is embedded in the annular guide groove to form a sliding connection, and both the annular guide groove and the annular guide strip surround the first annular sealing cavity of the bottom plate.

8. The circular rotary joint application device according to claim 2, characterized in that, The surfaces where the annular inner shell wall plate and the annular outer shell wall plate abut each other form an annular sealing cavity. The annular sealing cavity is located on the side of the liquid inlet sealing cavity away from the bottom plate of the annular outer shell. An annular sealing ring is provided inside the annular sealing cavity.

9. The circular rotary joint application device according to claim 8, characterized in that, The surfaces of the inner and outer annular shell panels that abut each other are respectively provided with an annular sealing groove for the inner shell panel and an annular sealing groove for the outer shell panel. The annular sealing grooves of the inner and outer shell panels are joined together to form the annular sealing cavity of the wall panel.

10. The circular rotary joint application device according to claim 8, characterized in that, One side of the contact surface of the annular inner shell wall panel and the annular outer shell wall panel is provided with an array of annular sealing grooves, and the other side of the contact surface is provided with an array of annular sealing strips. The array of annular sealing strips is embedded in the array of annular sealing grooves and does not abut against each other. The array of annular sealing grooves and the array of annular sealing strips are both located on the side of the annular sealing cavity of the wall panel away from the bottom plate of the annular outer shell.

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