Composite central revolving body capable of conveying various media

Abstract

A combined type center rotary body capable of conveying various media comprises a hydraulic rotary body, an electric slip ring, a first composite pipe, a second composite pipe, a first transition pipe and a second transition pipe, the first composite pipe and the second composite pipe respectively comprise an inner sleeve and an outer sleeve, and the inner sleeve is led out from the corresponding outer sleeve. A second transition pipe is rotationally installed between an inner sleeve of the second composite pipe and an inner sleeve of the first composite pipe in a sealed mode, outer sleeves of the first transition pipe and the second transition pipe are installed on an upper port and a lower port of the rotary body mandrel respectively, and an outer sleeve of the first composite pipe is rotationally connected with the first transition pipe in a sealed mode. High-pressure water channels are formed between the outer sleeve of the second composite pipe and the inner sleeve of the second composite pipe and among the rotary body mandrel, the second transition pipe, the outer sleeve of the first composite pipe and the inner sleeve of the first composite pipe, and a nitrogen dry powder mixture channel is formed by the inner sleeve of the second composite pipe, the second transition pipe and the inner sleeve of the first composite pipe. Machining is convenient, the coaxiality can be guaranteed, and dismounting and cleaning are convenient; and the overall diameter size of the rotary body can be reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to a composite central slewing body on a fire truck, which can convey various media such as water and fire extinguishing agents. Background Art

[0002] The central slewing body is an important component connecting the upper and lower parts of a fire truck. Large aerial work fire trucks can spray water and nitrogen dry powder mixture simultaneously, but they cannot be mixed before spraying out of the muzzle. The water flow diameter and the nitrogen dry powder mixture flow diameter of large aerial work fire trucks are very large. At the same time, there are mandatory standards for the vehicle width of aerial fire trucks, and the width cannot exceed the standard. There is an operating platform and various components on the turntable of the fire truck, and the space is very narrow. The existing central slewing body for transmitting four substances, namely high-pressure hydraulic oil, electricity, water, and nitrogen dry powder mixture, usually consists of a set of threaded joints connecting hoses or more than 6 groups of threaded joints connecting hoses in parallel for the water circuit. To ensure the water flow diameter of the water circuit and at the same time ensure the spatial layout of the threaded joints, the maximum outer diameter D will become extremely large, occupying a very large space, thus affecting the overall layout of the whole machine and even making it difficult to achieve the performance of the whole machine.

[0003] CN203677810U discloses a multi-agent combined central slewing body device, which includes: a fixed turntable frame, a slewing table rotatably arranged on the turntable frame, and the slewing table is driven by a driving device to rotate on the turntable frame; the rotating part of the central slewing body is fixedly connected to the slewing table, and the fixed part of the central slewing body is fixedly connected to the turntable frame; the rotating part of the central slewing body includes an outer output pipe, an inner output pipe coaxially arranged in the inner cavity of the outer output pipe, and a slewing valve body fixedly connected to the outside of the outer output pipe; the fixed part of the central slewing body includes an inner input pipe sleeved outside the inner output pipe and an outer input pipe correspondingly sleeved outside the outer output pipe. Sealing rings are arranged between the pipe walls of the inner output pipe and the inner input pipe, and between the pipe walls of the outer output pipe and the outer input pipe. Through the inner and outer output pipes, one fire extinguishing agent can be conveyed, or two fire extinguishing agents can be conveyed simultaneously. The length of the inner input pipe of this multi-agent combined central slewing body device is relatively long, and it penetrates through the outer output pipe as a whole and inserts into the inner input pipe. During the turning process, high processing accuracy is required to ensure the coaxiality of the inner output pipe and the outer output pipe, and the inner output pipe and the inner input pipe. In addition, when the fire extinguishing agent dry powder deposits on the inner wall of the pipe, the inner output pipe needs to be removed as a whole to clean it up, and the operation is rather troublesome. Summary of the Invention

[0004] The utility model aims to solve the above problems existing in the prior art and provides a composite central slewing body capable of conveying various media.

[0005] The technical solution of the utility model is: a composite central swivel that can transport multiple media, including a hydraulic swivel and an electric slip ring. The hydraulic swivel is assembled by a swivel core shaft and a swivel housing rotatably installed on the swivel core shaft. Hydraulic oil ports are provided on the swivel core shaft and the swivel housing, and the electric slip ring is arranged on the swivel housing. An electric slip ring cable hole is provided in the swivel core shaft. The special feature is that it further includes a first composite pipe, a second composite pipe, a first transition pipe, and a second transition pipe. The first composite pipe and the second composite pipe each include an inner and an outer sleeve, and the inner sleeve is led out from the corresponding outer sleeve. The outer sleeves of the first transition pipe and the second composite pipe are respectively installed at the upper and lower ports of the swivel core shaft. The outer sleeve of the first composite pipe is sealed and rotatably connected to the first transition pipe. A high-pressure water passage is formed between the outer sleeve and the inner sleeve of the second composite pipe, the swivel core shaft, the second transition pipe, and between the outer sleeve and the inner sleeve of the first composite pipe. The second transition pipe is sealed and rotatably installed between the inner sleeve of the second composite pipe and the inner sleeve of the first composite pipe, and the inner sleeve of the second composite pipe, the second transition pipe, and the inner sleeve of the first composite pipe form a nitrogen dry powder mixture passage.

[0006] Further, at least one inner sleeve sub-pipe one and inner sleeve sub-pipe two are respectively sleeved from the outside to the inside in the inner sleeves of the first composite pipe and the second composite pipe. The outer pipe orifice of the inner sleeve sub-pipe one is located outside the corresponding inner sleeve and outer sleeve of the first composite pipe. The outer pipe orifice of the inner sleeve sub-pipe two is located outside the corresponding inner sleeve and outer sleeve of the second composite pipe. The inner pipe orifices of the inner sleeve sub-pipe one and the inner sleeve sub-pipe two are opposite and an inner transition pipe is sealed and rotatably connected between them, forming at least another passage, enabling the composite swivel to be extended to three levels or more, and allowing more different pressure fluid media to be conducted.

[0007] Further, a first dynamic seal and a first guide ring are arranged between the outer sleeve of the first composite pipe and the first transition pipe. A second dynamic seal and a second guide ring are respectively arranged between the inner sleeve of the first composite pipe and the second transition pipe and between the inner sleeve of the second composite pipe and the second transition pipe to achieve sealed and rotatable connection between them.

[0008] Further, a hydraulic swivel seal and a hydraulic swivel guide ring are arranged between the swivel core shaft and the swivel housing to achieve sealing and guiding during rotation between them.

[0009] Further, the outer housing of the electric slip ring is connected to the swivel housing by a first bolt to achieve synchronous rotation of the electric slip ring and the swivel housing.

[0010] Further, a hydraulic swivel core shaft gland is installed on the upper end face of the swivel core shaft by screws, and the hydraulic swivel core shaft gland abuts against the inner port of the swivel housing.

[0011] Further, U-shaped holes are opened on the first composite pipe and the second composite pipe at the positions corresponding to the inner sleeve sub-pipes, and process plug plates are welded at the opening positions.

[0012] Furthermore, an annular groove is provided on the outer wall of the first transition pipe, and a clamping key is placed in the annular groove. The outer sleeve of the first composite pipe is placed on the outer wall of the upper port of the first transition pipe and is connected to the first transition pipe through the clamping key and a second bolt connected between the clamping key and the outer edge of the upper port of the first transition pipe.

[0013] The beneficial effects of the present utility model are as follows: A sealed rotational connection is achieved between the first composite pipe and the first transition pipe. The first composite pipe can achieve 360° continuous rotation, and the first composite pipe, the rotary body housing, and the electric slip ring housing rotate synchronously. The use of the first transition pipe enables segmented connection, which is convenient for processing, can ensure coaxiality, and is convenient for disassembly and cleaning. By using the first composite pipe and the second composite pipe, the conduction of hydraulic oil, current, and two pressure fluid media of different materials is realized, and the overall diameter size of the rotary body can be minimized. The present utility model is applied to aerial fire trucks for the transmission of four substances: high-pressure hydraulic oil, electricity, water, and nitrogen dry powder mixture. Water and nitrogen dry powder mixture can adopt a single delivery port, reducing the occupation of three-dimensional space, and can meet the application in occasions such as fire trucks where an open space cannot be provided, while the flow-through diameter of water and nitrogen dry powder mixture is very large. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a composite central rotary body capable of transporting multiple media in Embodiment 1 of the present utility model;

[0015] Figure 2 is Figure 1 the A-A cross-sectional view of;

[0016] Figure 3 is Figure 2 the left view of;

[0017] Figure 4 is Figure 1 the schematic structural diagram of the first composite pipe in;

[0018] Figure 5 is Figure 1 the schematic structural diagram of the second composite pipe in;

[0019] Figure 6 is a schematic structural diagram of a composite central rotary body capable of transporting multiple media in Embodiment 2 of the present utility model;

[0020] Figure 7 is Figure 6 the K-direction view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Embodiment 1:

[0022] As Figures 1-5As shown in the figure, a composite central rotating body capable of transporting multiple media includes a hydraulic rotating body, an electric slip ring 6, a first composite pipe 11, a second composite pipe 18, a first transition pipe 7 and a second transition pipe 14. The hydraulic rotating body is assembled by a rotating body core shaft 1 and a rotating body housing 2 rotatably installed on the rotating body core shaft 1. Hydraulic oil port passages 21 communicating with each other are provided on the rotating body core shaft 1 and the rotating body housing 2. The electric slip ring 6 is arranged on the rotating body housing 2, and an electric slip ring cable hole 22 is provided in the rotating body core shaft 1. The first composite pipe 11 includes inner and outer sleeves 1102 and 1101, and the inner sleeve 1802 extends from the outer sleeve 1801. The second composite pipe 18 includes inner and outer sleeves 1802 and 1801, and the inner sleeve 1802 extends from the outer sleeve 1801. The outer sleeves of the first transition pipe 7 and the second composite pipe 18 are respectively installed on the upper and lower ports of the rotating body core shaft 1, and a first transition pipe static seal 15 and a second composite pipe static seal 17 are arranged therebetween. The outer sleeve of the first composite pipe 11 is in sealed rotational connection with the first transition pipe 7. A high-pressure water passage is formed between the outer sleeve and the inner sleeve of the second composite pipe 18, between the rotating body core shaft 1, the second transition pipe 14, and between the outer sleeve and the inner sleeve of the first composite pipe 11. The second transition pipe 14 is installed between the inner sleeves of the second composite pipe 18 and the first composite pipe 11 in a sealed and rotational manner, and the inner sleeve of the second composite pipe 18, the second transition pipe 14 and the inner sleeve of the first composite pipe 11 form a nitrogen dry powder mixture passage.

[0023] A first dynamic seal 9 and a first guide ring 10 are arranged between the outer sleeve of the first composite pipe 11 and the first transition pipe 7. A second dynamic seal 13 and a second guide ring 12 are respectively arranged between the inner sleeve of the first composite pipe 11 and the second transition pipe 14 and between the inner sleeve of the second composite pipe 18 and the second transition pipe 14, so as to realize sealed rotational connection.

[0024] A hydraulic rotating body seal 3 and a hydraulic rotating body guide ring 4 are arranged between the rotating body core shaft 1 and the rotating body housing 2 to realize the sealing and guiding functions during the rotation therebetween.

[0025] The outer housing of the electric slip ring 6 is connected to the rotating body housing 2 by a first bolt 19 to realize the synchronous rotation of the electric slip ring 6 and the rotating body housing 2.

[0026] A hydraulic rotating body core shaft gland 16 is installed on the upper end face of the rotating body core shaft by screws 5, and the hydraulic rotating body core shaft gland 16 abuts against the inner port of the rotating body housing 2.

[0027] An annular groove is provided on the outer wall of the first transition pipe 7, a key 8 is placed in the annular groove, and the outer sleeve of the first composite pipe 11 is placed on the outer wall of the upper port of the first transition pipe 7 and is connected to the first transition pipe 7 by the key 8 and a second bolt 20 connected between the key 8 and the outer edge of the upper port of the first transition pipe 7.

[0028] When connecting, high-pressure water passes through port G to port g, and the nitrogen dry powder mixture passes through port H to port h.

[0029] Example 2:

[0030] As Figure 6 , Figure 7 As shown, an inner sleeve sub-tube one 23 and an inner sleeve sub-tube two 25 are respectively sleeved from the outside to the inside in the inner sleeve of the composite tube one 11 and the inner sleeve of the composite tube two 18. The outer pipe orifice of the inner sleeve sub-tube one 23 is located outside the inner sleeve of the corresponding composite tube one 11 and the outer sleeve of the composite tube one. The outer pipe orifice of the inner sleeve sub-tube two 25 is located outside the inner sleeve of the corresponding composite tube two 18 and the outer sleeve of the composite tube one. The inner pipe orifices of the inner sleeve sub-tube one 23 and the inner sleeve sub-tube two 25 are opposite and an inner transition pipe 24 is hermetically and rotatably connected therebetween to form another passage. The composite rotary body can be extended to 3 levels, and the conduction of two different pressure fluid media can be realized.

[0031] U-shaped holes are opened on the composite tube one 11 and the composite tube two 18 at positions corresponding to the inner sleeve sub-tubes, and a process plug 26 is welded at the opening position for installing the inner sleeve sub-tubes.

[0032] The above are only specific embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A composite central rotating body capable of conveying a variety of media, comprising a hydraulic rotating body and an electric slip ring, wherein the hydraulic rotating body is assembled from a rotating body core shaft (1) and a rotating body shell (2) rotatably mounted on the rotating body core shaft, wherein the rotating body core shaft (1) and the rotating body shell (2) are provided with hydraulic oil inlet passages (21) communicating with each other, and the electric slip ring (6) is arranged on the rotating body shell (2), wherein: It also includes a composite pipe 1 (11), a composite pipe 2 (18), a transition pipe 1 (7) and a transition pipe 2 (14), wherein the composite pipe 1 (11) and the composite pipe 2 (18) respectively include an inner sleeve and an outer sleeve, and the inner sleeve is led out from the outer sleeve corresponding to the inner sleeve, and the outer sleeves of the transition pipe 1 (7) and the composite pipe 2 (18) are respectively installed on the upper and lower ports of the rotating body core shaft (1), and the inner sleeve of the composite pipe 2 (18) and the inner sleeve of the composite pipe 1 (11) are sealed and rotatably installed to rotate the transition pipe 2 (14). 14), the outer sleeve of the composite tube 1 (11) is sealed and rotatably connected to the transition tube 1 (7); a high-pressure water passage is formed between the outer sleeve of the composite tube 2 (18) and the inner sleeve of the composite tube 2 (18), the rotary core shaft (1), the transition tube 2 (14), and the outer sleeve of the composite tube 1 (11) and the inner sleeve of the composite tube 1 (11); and a nitrogen dry powder mixture passage is formed between the inner sleeve of the composite tube 2 (18), the transition tube 2 (14) and the inner sleeve of the composite tube 1 (11).

2. The composite central rotating body capable of conveying multiple media according to claim 1, characterized in that: At least one inner sleeve auxiliary pipe 1 (23) and one inner sleeve auxiliary pipe 2 (25) are respectively sleeved inside the inner sleeve of the composite pipe 1 (11) and the inner sleeve of the composite pipe 2 (18) from the outside to the inside. The outer pipe opening of the inner sleeve auxiliary pipe 1 (23) is located outside the corresponding inner sleeve of the composite pipe 1 and the outer sleeve of the composite pipe 1, and the outer pipe opening of the inner sleeve auxiliary pipe 2 (25) is located outside the corresponding inner sleeve of the composite pipe 2 and the outer sleeve of the composite pipe 1. The inner pipe opening of the inner sleeve auxiliary pipe 1 and the inner pipe opening of the inner sleeve auxiliary pipe 2 are opposite to each other and are sealed and rotatably connected to the inner transition pipe (24) therebetween, so as to form at least another passage, so that the composite rotating body can be extended to 3 or even more levels, and more different pressure fluid media can be conducted.

3. The composite central rotating body capable of conveying multiple media according to claim 1 or 2, characterized in that: A dynamic seal 1 (9) and a guide ring 1 (10) are arranged between the outer sleeve of the composite pipe 1 (11) and the transition pipe 1 (7), and a dynamic seal 2 (13) and a guide ring 2 (12) are arranged between the inner sleeve of the composite pipe 1 (11) and the transition pipe 2 (14), and between the inner sleeve of the composite pipe 2 (18) and the transition pipe 2 (14), respectively, so as to realize a sealed rotation connection therebetween.

4. The composite central rotating body capable of conveying multiple media according to claim 1 or 2, characterized in that: A hydraulic rotary body seal (3) and a hydraulic rotary body guide ring (4) are arranged between the rotary body core shaft (1) and the rotary body shell (2) to achieve sealing therebetween and a guiding function during the rotation process.

5. The composite central rotating body capable of conveying multiple media according to claim 1 or 2, characterized in that: The outer shell of the electric slip ring (6) is connected to the rotating body shell (2) via bolt 1 (19), so that the electric slip ring and the rotating body shell can rotate synchronously.

6. The composite central rotating body capable of conveying multiple media according to claim 1 or 2, characterized in that: A hydraulic rotary body core shaft pressure cover (16) is installed on the upper end surface of the rotary body core shaft by means of screws (5), and the hydraulic rotary body core shaft pressure cover (16) is pressed against an inner port of the rotary body housing (2).

7. The composite central rotating body capable of conveying multiple media according to claim 2 is characterized in that: U-shaped holes are opened on the composite pipe 1 (11) and the composite pipe 2 (18) at positions corresponding to the inner sleeve auxiliary pipes, and process plugging plates (26) are welded at the opening positions.

8. The composite central rotating body capable of conveying multiple media according to claim 1 or 2, characterized in that: An annular groove is provided on the outer wall of the transition pipe 1 (7), a key (8) is placed in the annular groove, and the outer sleeve of the composite pipe 1 (11) is placed on the outer wall of the upper end of the transition pipe 1 (7) and is connected to the transition pipe 1 (7) through the key (8) and bolts 2 (20) connected between the key (8) and the outer edge of the upper end of the transition pipe 1 (7).

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