Slewing device and fire fighting truck

Abstract

The utility model relates to the technical field of fire fighting equipment, and provides a slewer and a fire fighting truck, the slewer comprises a revolving body, the revolving body comprises an inner shell and an outer shell, the outer shell is sleeved on the inner shell, an inner cavity is limited by the inner shell, and an outer cavity is limited between the inner shell and the outer shell. The inner cavity and the outer cavity synchronously extend in the length direction of the rotary body and penetrate through the two ends of the rotary body, and a supporting assembly is arranged between the inner shell and the outer shell and used for fixing the inner shell. The rotary device is used for overcoming the defect that a double-layer conveying pipe and the rotary body need to be nested for multiple times in the prior art, the function of supplying multiple fire extinguishing agents is directly achieved through the inner cavity and the outer cavity of the rotary body, the rotary body serves as an integral structural part, and a double-layer pipeline or a pipe-in-pipe sleeve does not need to be combined. The step of multiple nesting in the assembling process can be omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a rotary device and a fire fighting truck. Background Art

[0002] With the development of fire truck technology, fire trucks with multiple fire fighting agent supply functions have emerged. The multiple fire fighting agent supply function refers to the function of simultaneously supplying fire fighting liquid / foam and powder to improve fire fighting efficiency and expand the use scenarios. Among them, the slewing device of the fire truck is the main component to realize this function. The slewing device generally includes a double-layer delivery pipe and a slewing body sleeved on the outside of the double-layer delivery pipe. However, the double-layer delivery pipe and the slewing body need to be nested multiple times and fixed by a fixing body. The assembly process is complicated, there are many inconveniences in actual use, low assembly efficiency, and high difficulty. Utility Model Content

[0003] The first aspect of the utility model provides a rotating device to solve the defect in the prior art that multiple nesting is required between the double-layer delivery pipe and the rotating body, and the function of supplying multiple fire-fighting agents is directly realized through the inner cavity and the outer cavity of the rotating body. The rotating body is an integral structural part, and there is no need to combine double-layer pipelines or sleeves in pipes, which can save the steps of multiple nesting during the assembly process.

[0004] A second aspect of the utility model provides a fire truck.

[0005] The rotary device provided by the utility model comprises:

[0006] The rotating body comprises an inner shell and an outer shell, wherein the outer shell is sleeved on the outer side of the inner shell, the inner shell limits an inner cavity, and an outer cavity is limited between the inner shell and the outer shell, the inner cavity and the outer cavity extend in the same direction along the length direction of the rotating body and pass through both ends of the rotating body, and a support assembly is provided between the inner shell and the outer shell, and the support assembly is used to fix the inner shell.

[0007] The rotary device provided by the utility model also includes:

[0008] A first delivery head is disposed at the upper end of the rotating body, the first delivery head comprises a first inner tube and a first outer tube, the first inner tube is passed through the first outer tube, the first inner tube is communicated with the inner cavity, and the first outer tube is communicated with the outer cavity;

[0009] The second conveying head is arranged at the lower end of the rotating body, and the second conveying head comprises a second inner tube and a second outer tube, the second inner tube is penetrated through the second outer tube, the second inner tube is communicated with the inner cavity, and the second outer tube is communicated with the outer cavity.

[0010] According to the rotary device provided by the utility model, an annular groove is provided on one side of the shell close to the second conveying head, a retaining ring is provided in the annular groove, and the retaining ring is rotatably matched with the shell; and a flange matching the retaining ring is provided on one end of the second conveying head close to the shell.

[0011] According to the rotating device provided by the utility model, the support assembly includes at least one support plate, the support plate extends along the length direction of the rotating body, one side of the support plate is fixedly connected to the outer shell, and the other side of the support plate is fixedly connected to the inner shell.

[0012] According to the rotary device provided by the utility model, the inner shell includes at least two inner unit shells, the outer shell includes outer unit shells corresponding to the inner unit shells one by one, and a support assembly is provided between the inner unit shells and the corresponding outer unit shells.

[0013] The rotary device provided by the utility model further comprises a rotating body, which is sleeved on the outer shell and fixedly connected to the outer shell, and the rotating body is suitable for synchronously rotating with the outer shell.

[0014] The rotary device provided by the utility model further comprises a fixing sleeve, which is sleeved on the outer shell and rotatably matched with the outer shell.

[0015] According to the rotary device provided by the utility model, the shell is provided with a hydraulic channel, a first opening and a second opening, the first opening and the second opening are respectively connected to the hydraulic channel, the first opening is provided on a side of the shell away from the outer cavity, and the second opening is provided at least one end of the shell;

[0016] An annular groove is provided on at least one of the outer shell and the fixed sleeve, the annular groove is provided between the fixed sleeve and the outer shell, the first opening is communicated with the annular groove, and a hydraulic oil port communicated with the annular groove is provided on a side of the fixed sleeve away from the outer shell.

[0017] According to the rotary device provided by the utility model, the fixing sleeve comprises a body and a connecting portion, the body is sleeved on the outside of the shell, the body and the shell are rotatably matched, and the connecting portion is arranged at the upper end of the body.

[0018] A second aspect of the utility model provides a fire truck, comprising a vehicle body and a slewing device as described in any one of the aforementioned embodiments, wherein the slewing device is arranged on the vehicle body.

[0019] The rotary device provided by the embodiment of the utility model limits the inner and outer cavities separated by the inner and outer shells of the rotary body, so that different media can be transported through the outer and inner cavities respectively. For example, in the environment of firefighting and disaster relief, the foam water mixture and dry powder can be transported through the outer and inner cavities respectively, so that the function of supplying multiple fire-fighting agents can be realized and the fire-fighting ability can be improved. Compared with the prior art, the rotary device provided by the embodiment of the utility model directly realizes the function of supplying multiple fire-fighting agents through the inner and outer cavities of the rotary body. The rotary body is an integral structural part, and the overall device structure is simple and highly integrated. In this way, the design of the double-layer delivery pipe and the fixed body can be eliminated, and there is no need to combine double-layer pipelines or sleeves in pipes. The steps of multiple nesting in the assembly process can be omitted, simplifying the assembly process of the rotary device, improving assembly efficiency, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the rotary device provided in the embodiment of the utility model;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of a rotary device provided in an embodiment of the utility model;

[0023] Figure 3 is a schematic cross-sectional structure diagram of the rotary device provided by an embodiment of the utility model at another viewing angle;

[0024] Figure 4 It is a schematic cross-sectional structure diagram of another rotary device provided by an embodiment of the utility model;

[0025] Figure 5 It is a schematic cross-sectional structure diagram of another rotary device provided in an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100: rotating body; 110: inner shell; 111: inner unit shell; 120: outer shell; 121: annular groove; 122: hydraulic channel; 123: first opening; 124: second opening; 125: outer unit shell; 130: inner cavity; 140: outer cavity; 150: support assembly; 151: support plate; 160: snap ring;

[0028] 200: first delivery head; 210: first inner tube; 220: first outer tube;

[0029] 300: second delivery head; 310: second inner tube; 320: second outer tube; 330: flange;

[0030] 400: fixed sleeve; 410: main body; 420: connecting part; 430: hydraulic oil port; 500: rotating body. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0035] Figure 1 It is a schematic diagram of the overall structure of the rotary device provided in the embodiment of the utility model; Figure 2 It is a schematic cross-sectional structure diagram of a rotary device provided in an embodiment of the utility model; Figure 3 It is a schematic diagram of the cross-sectional structure of the rotary device provided by an embodiment of the utility model at another viewing angle.

[0036] See also Figures 1 to 3 The first aspect of the utility model provides a rotating device, which includes a rotating body 100, and the rotating body 100 includes an inner shell 110 and an outer shell 120. The outer shell 120 is sleeved on the outside of the inner and outer shells, and the inner shell 110 limits an inner cavity 130 in a direction away from the outer shell 120, and an outer cavity 140 is limited between the outer shell 120 and the inner shell 110. The inner cavity 130 and the outer cavity 140 extend in the same direction along the length direction of the rotating body 100 and pass through both ends of the rotating body 100. In other words, the two ends of the rotating body 100 are respectively provided with openings corresponding to the inner cavity 130 and the outer cavity 140. It should be noted that the inner shell 110 and the outer shell 120 can be coaxial or non-coaxial, and can be adaptively designed according to specific needs.

[0037] The cross-section of the inner shell 110 may be circular, square, triangular or other polygonal. In other words, the inner cavity 130 may be cylindrical or cubical. The cross-section of the outer shell 120 is circular to ensure the rotational coordination between the outer shell 120 and the rotating body 500 or the fixed sleeve 400. It should be noted that the specific shape of the outer cavity 140 is affected by the shape of the inner shell 110. For example, when the inner shell 110 is cylindrical and the inner shell 110 and the outer shell 120 are coaxial, the outer cavity 140 is an annular cavity. When the inner shell 110 and the outer shell 120 are both cylindrical but not coaxial, the outer cavity 140 will present a special shape with one side narrow and the other side wide.

[0038] The present invention is an example in which the outer shell 120 and the inner shell 110 are both cylindrical and coaxial, but the example is not a specific limitation of the present invention. The specific shapes of the outer cavity 140 and the inner cavity 130 can be adaptively designed according to actual needs. A support assembly 150 is provided between the inner shell 110 and the outer shell 120. The support assembly 150 is used to fix the inner shell 110 so that the inner shell 110 and the outer shell 120 are connected together to ensure the stability of the inner shell 110.

[0039] See also Figures 1 to 3 It can be understood that the rotary device provided by the embodiment of the utility model limits the inner cavity 130 and the outer cavity 140 separated by the inner shell 110 and the outer shell 120 of the rotary body 100. In this way, different media can be transported through the outer cavity 140 and the inner cavity 130 respectively. For example, in the environment of fire fighting and disaster relief, the foam water mixture and the dry powder are transported through the outer cavity 140 and the inner cavity 130 respectively, so that the function of supplying multiple fire fighting agents can be realized and the fire extinguishing ability can be improved. Compared with the prior art, the rotary device provided by the embodiment of the utility model directly realizes the function of supplying multiple fire fighting agents through the inner cavity 130 and the outer cavity 140 of the rotary body 100. The rotary body 100 is an integral structural part, and the overall device structure is simple and highly integrated. In this way, the design of the double-layer delivery pipe and the fixed body can be eliminated, and there is no need to combine the double-layer pipeline or the sleeve in the pipe. The steps of multiple nesting in the assembly process can be omitted, the assembly process of the rotary device is simplified, the assembly efficiency can be improved, and the production cost can be reduced.

[0040] See also Figure 1 and Figure 2 In an optional embodiment of the utility model, the rotary device further includes a first delivery head 200 and a second delivery head 300. The first delivery head 200 is disposed at the upper end of the rotating body 100 and is fixedly connected to the rotating body 100. The first delivery head 200 includes a first inner tube 210 and a first outer tube 220. The first inner tube 210 is connected to the inner cavity 130, and the first outer tube 220 is connected to the outer cavity 140. The first inner tube 210 is passed through the first outer tube 220. Figure 2 As shown, one end of the first inner tube 210 is nested inside and outside the first outer tube 220, and the other end of the first inner tube 210 is passed through the side wall of the first outer tube 220; in an optional embodiment of the utility model, the first inner tube 210 can also be an integral structure nested inside and outside with the first outer tube 220, and extend in the same direction, such as a structure similar to the aforementioned outer shell 120 and inner shell 110. Specifically, it can be adaptively selected according to actual conditions.

[0041] In an optional embodiment of the utility model, the first inner tube 210, close to one end of the rotating body 100, can partially extend out of the first outer tube 220, so that during assembly, the extended portion of the first inner tube 210 can extend into the inner cavity 130 to facilitate assembly and sealing.

[0042] The second delivery head 300 is disposed at the lower end of the rotating body 100. The second delivery head 300 includes a second inner tube 310 and a second outer tube 320. The second inner tube 310 is connected to the inner cavity 130, and the second outer tube 320 is connected to the outer cavity 140. The second inner tube 310 is inserted into the second outer tube 320. Figure 2 As shown in the figure, one end of the second inner tube 310 is nested inside and outside the second outer tube 320, and the other end of the second inner tube 310 is inserted through the side wall of the second outer tube 320; in an optional embodiment of the utility model, the second inner tube 310 can also be nested inside and outside the second outer tube 320 and extend in the same direction, such as the structure of the outer shell 120 and the inner shell 110 mentioned above. Specifically, it can be adaptively selected according to actual conditions. In an optional embodiment of the utility model, one end of the second inner tube 310 close to the rotating body 100 can partially extend out of the second outer tube 320, so that during assembly, the extended part of the second inner tube 310 can extend into the inner cavity 130 to facilitate assembly and sealing.

[0043] See also Figure 1 and Figure 2 It is easy to understand that the embodiment of the utility model is provided with a first delivery head 200 and a second delivery head 300, and the upper ends of the inner cavity 130 and the outer cavity 140 are correspondingly connected through the first inner tube 210 and the first outer tube 220, and the lower ends of the inner cavity 130 and the outer cavity 140 are correspondingly connected through the second inner tube 310 and the second outer tube 320. In this way, when the fluid is transmitted, it is convenient to guide the fluid in and out of the inner cavity 130 and the outer cavity 140, and assist in the realization of the multi-fire fighting agent supply function of the rotary device; in addition, the first delivery head 200 and the second delivery head 300 are easy to connect with the external pipeline, which solves the problem of connecting the rotating body 100 with the external pipeline, improves the assembly efficiency of the overall device, and reduces the assembly difficulty.

[0044] It should be noted here that the bending direction of the first inner tube 210 and the second inner tube 310 relative to the rotating body 100 (i.e., the direction in which the first inner tube 210 passes through the first outer tube 220, and the direction in which the second inner tube 310 passes through the second outer tube 320, for details, please refer to Figure 1 and Figure 2 The ) may be the same or different and may be selected adaptively according to actual conditions.

[0045] Continue reading Figure 2In an optional embodiment of the utility model, an annular groove is provided on one side of the shell 120 close to the second delivery head 300, and the annular groove is used to clamp the clamping ring 160, and the clamping ring 160 can rotate relative to the shell 120. Correspondingly, a flange 330 matching the clamping ring 160 is provided on one end of the second delivery head 300 close to the shell 120; during assembly, the clamping ring 160 can be first sleeved in the annular groove, and then the second delivery head 300 with the flange 330 can be sleeved on the end of the shell 120, and the flange 330 and the annular groove are fixedly connected, so that the second delivery head 300 can also rotate relative to the shell 120.

[0046] It is easy to understand that when the second delivery head 300 is connected to an external pipeline, the external pipeline is not convenient to rotate, so the second delivery head 300 and the housing 120 are rotated and matched by the cooperation of the clamping ring 160 and the flange 330. When the housing 120 rotates, the conflict between the rotation of the housing 120 and the inconvenience of the second delivery head 300 to rotate can be avoided, which can make the design of the rotary device more reasonable and more practical. In an optional embodiment of the utility model, a sealing ring can be set between the housing 120 and the second delivery head 300 to improve the sealing between the two and prevent the fluid from leaking out of the gap at the connection between the two.

[0047] See also Figure 3 In an optional embodiment of the present invention, the support assembly 150 includes at least one support plate 151, the support plate 151 extends along the length direction of the rotating body 100, one side of the support plate 151 is fixedly connected to the outer shell 120, and the other side is fixedly connected to the inner shell 110. It can be understood that the support plate 151 can improve the integrity of the inner shell 110 and the outer shell 120, and improve the stability of the inner shell 110. Based on the above embodiment, in an optional embodiment of the present invention, when at least two support plates 151 are provided, such as Figure 3 As shown, the outer chamber 140 can be divided into at least two chambers. When the fire extinguishing agent is transported, the fire extinguishing agent can be split at the second transport head 300 and merged at the first transport head 200 to improve the transmission efficiency.

[0048] In an optional embodiment of the utility model, the support assembly 150 may include at least one support rod, one end of the support rod is fixedly connected to the outer shell 120, and the other end is fixedly connected to the inner shell 110; when multiple support rods are provided, the support rods may be evenly spaced between the inner shell 110 and the outer shell 120 along the length direction of the rotating body 100, so that the stress between the inner shell 110 and the outer shell 120 is evenly distributed, thereby improving the stability of the inner shell 110.

[0049] Figure 4 It is a schematic cross-sectional structure diagram of another rotary device provided in an embodiment of the utility model.

[0050] See also Figure 4 , different from the aforementioned embodiment, in an optional embodiment of the utility model, the inner shell 110 includes at least two inner unit shells 111, in other words, the inner shell 110 is obtained by combining at least two inner unit shells 111, and correspondingly, the outer shell 120 may include an outer unit shell 125 corresponding to the inner unit shell 111, that is, the number and position of the inner unit shells 111 and the outer unit shells 125 correspond to each other, all the inner unit shells 111 are spliced ​​and fixed in sequence to form the aforementioned inner shell 110, and all the outer units can be spliced ​​and fixed in sequence to form the aforementioned outer shell 120, and at least one support assembly 150 can be provided between each group of inner unit shells 111 and outer units, and the support assembly 150 can be arranged at the end of the inner unit shell 111 and the adjacent inner unit shell 111, or at the middle position of the inner unit shell 111 (in this case, the cross-sectional shape of the outer sub-cavity is approximately a curved "I" shape).

[0051] Figure 4 As shown, two support plates 151 are included between each group of inner unit shells 111 and outer unit shells 125. The support plates 151 are respectively arranged at the joints of the inner unit shells 111 and the adjacent inner unit shells 111. Similar to the aforementioned embodiment, the support plates 151 here can play the role of separating the outer cavity 140. What is shown in the figure is only a specific example given by the present invention and is not a specific limitation of the present invention. The assembly position between the support assembly 150 and the inner unit shells 111 and the outer unit shells 125 can be adaptively adjusted according to actual needs.

[0052] It is easy to understand that in the embodiment of the utility model, by dividing the inner shell 110 into at least two units and the outer shell 120 into at least two units, the manufacturing and processing of the rotating body 100 can be facilitated, the processing difficulty of the rotating body 100 is reduced, and it is easy to promote and use.

[0053] Figure 5 It is a schematic cross-sectional structure diagram of another rotary device provided in an embodiment of the utility model.

[0054] See also Figure 5In an optional embodiment of the present invention, the rotating device further comprises a rotating body 500, which is sleeved on the outside of the outer shell 120, that is, the rotating body 500 is sleeved on the outside of the rotating body 100, and the rotating body 500 is fixedly connected to the outer shell 120, and the rotating body 500 is suitable for synchronously rotating with the outer shell 120. It can be understood that the existing rotating body 100 needs to take into account the functions of rotation and support, and usually some hydraulic pipelines need to be laid, which makes the rotating body 100 thicker in the radial direction. In other words, the volume and weight of the rotating body 100 are large. When the outer cavity 140 and the inner cavity 130 are processed and manufactured, the production and manufacturing are difficult and the transportation is troublesome. By setting the rotating body 500, some functions that the rotating body 100 originally needs to undertake can be transferred to the rotating body 500, such as Figure 5 As shown, most of the volume and thickness are transferred to the rotating body 500, and the rotating body 100 is thinned to facilitate the processing of the inner cavity 130 and the outer cavity 140 of the rotating body 100. Regardless of the integrated structure of the outer shell 120 and the inner shell 110 in the aforementioned embodiment, or the combined structure of the inner unit shell 111 and the outer unit shell 125, this can improve the efficiency of production and processing, shorten the production cycle, and reduce the overall manufacturing cost of the rotating device.

[0055] See also Figure 1 and Figure 2 In an optional embodiment of the utility model, the rotating device also includes a fixing sleeve 400, which is sleeved on the outer side of the outer shell 120 and rotates with the outer shell 120. The fixing sleeve 400 is used to connect to an external supporting device, such as a turntable on a fire truck. Through the fixing sleeve 400, a relatively rotatable support point can be given to the rotating body 100 to ensure the rotation requirement of the rotating body 100.

[0056] Continue reading Figure 2 In an optional embodiment of the utility model, the housing 120 is provided with a hydraulic channel 122, and the hydraulic channel 122 extends along the length direction of the housing 120. The outer wall of the housing 120 is provided with a first opening 123. The outer wall of the housing 120 is the surface of the housing 120 on the side away from the outer cavity 140. The first opening 123 is communicated with the hydraulic channel 122. The upper end of the housing 120 is provided with a second opening 124 corresponding to the first opening 123, and the second opening 124 is also communicated with the hydraulic channel 122. In other words, the first opening 123 and the second opening 124 are respectively provided at the two ends of the hydraulic channel 122. In an optional embodiment of the utility model, the number of the hydraulic channel 122 can be set to one or more, see Figure 2 In the embodiment of the utility model, two hydraulic channels 122 and two first openings 123 and two second openings 124 corresponding to the two hydraulic channels 122 are taken as examples for illustration and description.

[0057] Specifically, the hydraulic channel 122 is L-shaped, with the horizontal side facing the outside of the housing 120. Figure 2 The structure shown in the figure shows that the two hydraulic channels 122 are distributed on both sides of the shell 120 along the axis of the shell 120. In some optional examples, the two hydraulic channels 122 may not be distributed on both sides of the shell 120. For example, the two hydraulic channels 122 are arranged on the same side of the shell 120. When multiple hydraulic channels 122 are arranged, the hydraulic channels 122 can be arranged around the axis of the shell 120, and can be arranged at uniform intervals or at uneven intervals. Specifically, it can be adaptively selected according to actual conditions.

[0058] In an optional embodiment of the present invention, different from the above-mentioned embodiment, the second opening 124 can also be arranged at the lower end of the housing 120, see Figure 2 , that is, the long side of the "L"-shaped hydraulic channel 122 shown in this embodiment is turned downward. In this case, the external oil pipe can be connected to the housing 120 from bottom to top, which can be adaptively set according to actual conditions. In some other embodiments of the utility model, the upper and lower ends of the housing 120 can be provided with a second opening 124. In this case, the hydraulic channel 122 is a "T" shape rotated 90° clockwise, that is, one first opening 123 corresponds to two second openings 124, which can be adaptively selected according to actual conditions.

[0059] See also Figure 2 In an optional embodiment of the utility model, an annular groove 121 is provided on the side of the fixing sleeve 400 facing the outer shell 120, and the annular groove 121 is formed by the inner wall surface of the fixing sleeve 400 being recessed. The annular groove 121 is connected to the first opening 123, and a hydraulic oil port 430 is provided on the side of the fixing sleeve 400 away from the outer shell 120, and the hydraulic oil port 430 is also connected to the annular groove 121, that is, the first opening 123 can be connected to the hydraulic oil port 430 through the annular groove 121.

[0060] In an optional embodiment of the utility model, different from the above-mentioned embodiment, an annular groove 121 is provided on the side of the outer shell 120 facing the fixed sleeve 400, that is, an annular groove 121 is provided on the outer wall of the outer shell 120, and the annular groove 121 is formed by a depression on the outer wall surface of the outer shell 120. Similar to the above-mentioned embodiment, the annular groove 121 is connected with the first opening 123, and a hydraulic oil port 430 is provided on the side of the fixed sleeve 400 away from the outer shell 120, and the hydraulic oil port 430 is also connected with the annular groove 121, that is, the first opening 123 can be connected with the hydraulic oil port 430 through the annular groove 121.

[0061] In some other optional embodiments of the utility model, different from the aforementioned embodiments, an annular groove 121 can be provided on the outer shell 120 and the fixed sleeve 400 at the same time, that is, an annular groove 121 is provided on the side of the outer shell 120 facing the fixed sleeve 400, and an annular groove 121 is also provided on the side of the fixed sleeve 400 facing the outer shell 120, and the annular groove 121 on the outer shell 120 corresponds to the position of the annular groove 121 on the fixed sleeve 400. In other words, the annular groove 121 on the outer shell 120 and the annular groove 121 on the fixed sleeve 400 are connected to each other, and the two can jointly enclose an annular rotating chamber, which is connected to the first opening 123. At the same time, a hydraulic oil port 430 connected to the annular rotating chamber is provided on the side of the fixed sleeve 400 away from the outer shell 120.

[0062] It should be noted that the annular groove 121 on the outer shell 120 and the annular groove 121 on the fixing sleeve 400 may have different widths. For example, the annular groove 121 on the outer shell 120 may be wider, or the annular groove 121 on the fixing sleeve 400 may be wider. Specifically, the adaptive setting may be performed according to actual needs.

[0063] See also Figure 2 It can be understood that the rotating device provided by the embodiment of the utility model is provided with an annular groove 121 on at least one of the fixed sleeve 400 and the outer shell 120. In this way, the first opening 123 on the outer shell 120 and the hydraulic oil port 430 on the fixed sleeve 400 can be connected through the annular groove 121, thereby realizing the connection between the second opening 124 on the outer shell 120 and the hydraulic oil port 430 on the fixed sleeve 400. When the outer shell 120 rotates relative to the fixed sleeve 400, the annular groove 121 can continuously maintain the connection between the second opening 124 and the hydraulic oil port 430, thereby solving the interference problem between the design position of the hydraulic oil port 430 and the rotating motion of the outer shell 120.

[0064] Compared with the prior art, the rotary device provided in the embodiment of the utility model can make the hydraulic oil port 430 connected to the external oil pipe relatively arranged on the side of the rotary device by sleeve-mounting the fixing sleeve 400 on the outside of the outer shell 120 and opening the annular groove 121 between the two. This can solve the problem of motion interference between the existing transmission oil pipe and the rotating body 100 when the rotary device performs a rotary motion, which is beneficial to the assembly and use of the rotary device.

[0065] In an optional embodiment of the utility model, when a rotating body 500 is provided, that is, when a rotating body 500 is provided between the outer shell 120 and the fixed sleeve 400, the aforementioned hydraulic channel 122, the first opening 123 and the second opening 124 can be provided on the rotating body 500. The matching relationship between the rotating body 500 and the fixed sleeve 400 can refer to the outer shell 120 and the fixed sleeve 400 described above, and will not be repeated herein. It is easy to understand that in addition to the beneficial effects of the aforementioned rotating body 500, in this embodiment, the rotating body 500 can also be used as a component for transmitting hydraulic oil, sharing part of the functions of the outer shell 120. During the production process, the outer shell 120 and the rotating body 500 are manufactured separately, which can improve the overall production efficiency of the device and reduce the overall manufacturing cost of the rotary device.

[0066] Continue reading Figure 2 In an optional embodiment of the utility model, the fixing sleeve 400 includes a body 410 and a connecting portion 420. The body 410 is sleeved on the outer side of the shell 120, the body 410 and the shell 120 are rotatably matched, and the connecting portion 420 is arranged at the upper end of the body 410. It can be understood that the connecting portion 420 can facilitate the fixing sleeve 400 to be fixedly connected to the external support frame. For example, when the slewing device is installed on a fire truck, the connecting portion 420 can facilitate the fixing connection with the turntable frame on the fire truck.

[0067] The second aspect of the utility model provides a fire truck, which includes a vehicle body 410 and a slewing device of any one of the aforementioned embodiments, and the slewing device is arranged on the vehicle body 410. Specifically, a turntable frame is arranged on the vehicle body 410, and the fixing sleeve 400 is fixedly connected to the turntable frame. A powder spray cabin, a tank body and a fire cannon are also arranged on the vehicle body 410. In a specific embodiment, the first outer tube 220, the second outer tube 320 and the outer cavity 140 can be used to connect the tank body and the fire cannon, and the first inner tube 210, the second inner tube 310 and the inner cavity 130 can be used to connect the powder spray cabin and the fire cannon. In this way, the foam water mixture can be supplied to the fire cannon through the tank body, and the dry powder can be supplied to the fire cannon through the powder spray cabin, so as to provide the required fire extinguishing agent to the fire cannon with multiple fire fighting agent supply functions at the same time, so as to achieve rapid fire extinguishing.

[0068] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present utility model.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A rotary device, characterized in that: include: The rotating body comprises an inner shell and an outer shell, wherein the outer shell is sleeved on the outer side of the inner shell, the inner shell limits an inner cavity, and an outer cavity is limited between the inner shell and the outer shell, the inner cavity and the outer cavity extend in the same direction along the length direction of the rotating body and pass through both ends of the rotating body, and a support assembly is provided between the inner shell and the outer shell, and the support assembly is used to fix the inner shell.

2. The rotary device according to claim 1, characterized in that: Also includes: A first delivery head is disposed at the upper end of the rotating body, the first delivery head comprises a first inner tube and a first outer tube, the first inner tube is passed through the first outer tube, the first inner tube is communicated with the inner cavity, and the first outer tube is communicated with the outer cavity; The second conveying head is arranged at the lower end of the rotating body, and the second conveying head comprises a second inner tube and a second outer tube, the second inner tube is penetrated through the second outer tube, the second inner tube is communicated with the inner cavity, and the second outer tube is communicated with the outer cavity.

3. The rotary device according to claim 2, characterized in that: An annular groove is provided on one side of the shell close to the second delivery head, a retaining ring is provided in the annular groove, and the retaining ring is rotatably matched with the shell; a flange matching the retaining ring is provided on one end of the second delivery head close to the shell.

4. The rotary device according to claim 1, characterized in that: The support assembly includes at least one support plate, which extends along the length direction of the rotating body. One side of the support plate is fixedly connected to the outer shell, and the other side of the support plate is fixedly connected to the inner shell.

5. The rotary device according to any one of claims 1 to 4, characterized in that: The inner shell includes at least two inner unit shells, the outer shell includes outer unit shells corresponding to the inner unit shells one by one, and a support assembly is provided between the inner unit shells and the corresponding outer unit shells.

6. The rotary device according to claim 5, characterized in that: It also includes a rotating body, which is sleeved on the shell and fixedly connected to the shell, and the rotating body is suitable for synchronous rotation with the shell.

7. The rotary device according to any one of claims 1 to 4, characterized in that: It also includes a fixing sleeve, which is sleeved on the shell and rotatably matched with the shell.

8. The rotary device according to claim 7, characterized in that: The housing is provided with a hydraulic passage, a first opening and a second opening, the first opening and the second opening are respectively connected to the hydraulic passage, the first opening is provided at a side of the housing away from the outer cavity, and the second opening is provided at at least one end of the housing; An annular groove is provided on at least one of the outer shell and the fixed sleeve, the annular groove is provided between the fixed sleeve and the outer shell, the first opening is communicated with the annular groove, and a hydraulic oil port communicated with the annular groove is provided on a side of the fixed sleeve away from the outer shell.

9. The rotary device according to claim 7, characterized in that: The fixing sleeve comprises a body and a connecting portion. The body is sleeved on the outer side of the shell. The body and the shell are rotatably matched. The connecting portion is arranged at the upper end of the body.

10. A fire truck, characterized in that: It comprises a vehicle body and a slewing device as claimed in any one of claims 1 to 9, wherein the slewing device is arranged on the vehicle body.

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