WO2013026191A1

WO2013026191A1 - Rotational connector and environmental sanitation vehicle comprising same

Info

Publication number: WO2013026191A1
Application number: PCT/CN2011/078690
Authority: WO
Inventors: 任永泰; 黄磊
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-08-22
Filing date: 2011-08-22
Publication date: 2013-02-28

Abstract

Disclosed is a rotational connector, comprising a core body (10) and a housing (20) by which the core body is sheathed, the housing (20) being relatively movable with respect to the core body (10), with an annular groove formed between the core body (10) and the housing (20), the annular groove being in communication with the outside of the rotational connector via a first channel (21) in the housing (20) and a second channel (14) in the core body (10), wherein the annular groove comprises a first annular groove (11), a second annular groove (12) and a separation groove (13) provided between the first annular groove (11) and the second annular groove (12), the insulation groove (13) being in communication with the outside of the housing (20). An environmental sanitation vehicle comprises the abovementioned rotational connector. In the present invention, providing the separation groove (13) between the core body (10) and the housing (20) causes the liquid leaked from the first annular groove (11) or the second annular groove (12) to flow into the separation groove (13) so as to solve the problem that the liquid in the first annular groove (11) and the liquid in the second annular groove (12) flow into each other.

Description

Slewing joint and sanitation vehicle including the same

Technical field

The present invention relates to the field of construction machinery, and in particular to a swivel joint and a sanitation vehicle including the swivel joint. Background technique

The swivel joint is a multi-pass rotary oil circuit connection device suitable for construction machinery equipped with a slewing support structure.

Common rotary joints include hydraulic adapters and water-oil rotary joints. The former is widely used in excavators, hydraulic cranes and other construction machinery for the transmission of pressure oil; the latter is mostly used in special vehicles such as fire engines and aerial work vehicles to complete the pressure oil, water and electric signals on the upper and lower platforms. Transfer between.

CN 201198577Y discloses an eight-channel hydraulic central rotary joint, which comprises a rotary body, a rotary shaft and an end cover. The rotary shaft is axially inserted into the rotary body from the front end of the rotary body, and the front end of the rotary shaft extends out of the rotary body. The cover is fixedly connected to the rear end of the rotary body, and the rotary shaft is provided with eight oil passage holes with different depths from the rear end of the front end phase, one of which is arranged at the center of the rotary shaft, which is a central drain hole, and the other seven are evenly distributed in the center The outer periphery of the drain hole is the main oil passage hole, corresponding to the seven main oil passage holes on the rotary shaft. The seven main oil ports on the rotary body are also in one-to-one correspondence with the seven main oil passage holes on the rotary shaft.

The above-mentioned rotary joint is only used to transfer hydraulic oil, and the hydraulic oil itself has lubrication and rust prevention function, so there is no special requirement for the material and rust prevention of the central shaft. However, in some special vehicles such as fire engines, sanitation vehicles, and aerial work vehicles, it is necessary to pass corrosive liquids such as water and washing liquid into the rotary joint. Corrosive liquids such as water and washing liquid may cause the shell and core of the swivel joint to rust, generate iron scraps and other impurities, scrape the seals, and cause liquid overflow and internal leakage into the other oil passages in the rotary joint. And cause the emulsification of hydraulic oil and the pollution of the entire hydraulic system, hydraulic components Corrosion, component wear, seal failure, etc., and ultimately lead to various hydraulic failures and damage to hydraulic components. Therefore, how to solve the problem that the hydraulic fluid and the corrosive liquid rotary joint need to be transported, the corrosive liquid and the hydraulic oil interact with each other become a technical problem to be solved in the art. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a swivel joint capable of preventing corrosive liquid flowing into the swivel joint from colliding with hydraulic oil.

In order to achieve the above object, as one aspect of the present invention, a rotary joint is provided, the rotary joint including a core body and a casing sleeved outside the core body, the casing and the core body being rotatable relative to each other An annular groove is formed between the core body and the casing, and the annular groove communicates with the outside of the rotary joint through a first passage on the casing and a second passage in the core, wherein The annular groove includes a first annular groove, a second annular groove, and an isolation groove disposed between the first annular groove and the second annular groove, the isolation groove being in communication with an exterior of the housing.

Preferably, a sealing ring is disposed between the isolation groove and the first annular groove, and/or between the isolation groove and the second annular groove.

Preferably, the sealing ring comprises an O-ring and a Glyd ring disposed outside the O-ring. Preferably, the housing is provided with a flow guiding hole that communicates the isolation groove with the outside of the housing.

Preferably, the swivel joint further includes a draft tube and a liquid collecting bottle, the liquid collecting bottle is disposed outside the casing, and the draft tube isolates the liquid collecting bottle from the liquid guiding hole through the guiding hole The slots are connected.

Preferably, the collection bottle is transparent.

Preferably, at least one of the first annular groove, the second annular groove and the isolation groove is disposed on an outer surface of the core.

Preferably, the first annular groove is plural, and/or the second annular groove is plural.

Preferably, the first passage is disposed on the housing in a radial direction.

Preferably, the second passage includes an axial bore extending along an axial direction of the core and along the A radially extending radial bore of the core that communicates the axial bore with the first annular groove or the second annular groove.

Preferably, at least one of an outer surface of the core, an inner surface of the casing, an inner surface of the first passage, and an inner surface of the second passage is provided with a chrome plating layer.

As another aspect of the present invention, a sanitation vehicle is provided, the sanitation vehicle including a swivel joint, wherein the swivel joint is the above-described swivel joint provided by the present invention.

Preferably, the sanitation vehicle is a wall washer.

Preferably, in the swivel joint, the number of the first annular grooves is three, the number of the second annular grooves is two, and correspondingly, the number of the first and second channels is respectively Five.

The invention provides an isolation groove between the first annular groove (for example, hydraulic oil) and the second annular groove (for example, water or washing liquid), and if the liquid in the first annular groove leaks, it flows into the isolation groove. If liquid leakage in the second annular groove also flows into the isolation groove, the problem of liquid mutual enthalpy in the first annular groove and the second annular groove is solved.

Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are in the In the drawing:

1 is a front elevational view of a swivel joint in accordance with an embodiment of the present invention;

Figure 2 is a T-direction view of the swivel joint shown in Figure 1;

Figure 3 is a P-direction view of the swivel joint shown in Figure 1;

Figure 4 is a partially enlarged schematic view of the swivel joint illustrated in Figure 1;

Figure 5 shows the installation position of the swivel joint provided in the sanitation vehicle according to the present invention. Intention. detailed description

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended to be illustrative and not restrictive.

As an aspect of the present invention, a swivel joint is provided, and Fig. 1 is a front view of a swivel joint according to an embodiment of the present invention. As shown in the figure, the swivel joint includes a core body 10 and a casing 20 sleeved outside the core body 10. The casing 20 and the core body 10 are relatively rotatable, and a core 10 and the casing 20 are formed. There is an annular groove that communicates with the exterior of the swivel joint through the first passage 21 on the housing 20 and the second passage 14 in the core 10, wherein the annular groove includes a first annular groove 11 and a second annular groove 12 And an isolation groove 13 disposed between the first annular groove 11 and the second annular groove 12, the isolation groove 13 communicating with the outside of the casing 20.

In the above-described swivel joint, hydraulic oil is introduced into the first annular groove 11 from the first passage 21 (second passage 14) corresponding to the first annular groove 11, and flows into the second passage 14 through the first annular groove 11 ( The first passage 21) transfers hydraulic oil from the upper portion (lower portion) of the swivel joint to the lower portion (upper portion) of the swivel joint. Water or washing liquid flows into the second annular groove 12 from the first passage 21 corresponding to the second annular groove 12, and flows into the second passage 14 corresponding to the second annular groove 12 through the second annular groove 12, and passes through A steel pipe 15 communicating with the second passage 14 flows out of the swivel joint. If the hydraulic oil in the first annular groove 11 leaks, the hydraulic oil in the first annular groove 11 flows into the isolation groove 13 along the gap between the core 10 and the casing 20, and is led out from the isolation groove 13. It is outside the casing 20 and does not flow into the second annular groove 12. Similarly, if the liquid in the second annular groove 12 leaks, the leaked liquid also flows into the isolation groove 13 and is led out of the isolation groove 13 to the outside of the casing 20 without flowing into the first annular groove 12. Thereby, the liquid in the first annular groove 11 and the second annular groove 12 is prevented from colliding with each other.

The isolation slot 13 can be in communication with the exterior of the housing 20 in a variety of ways, for example, in a housing A flow path is provided in the body 20, and the isolation groove 13 is communicated with the outside of the casing 20. A flow path may be provided in the core 10 to communicate the isolation groove 13 with the outside of the casing 20.

In order to prevent mutual entanglement in the first annular groove 11 and the second annular groove 12, preferably, between the isolation groove 13 and the first annular groove 11, and/or between the isolation groove 13 and the second annular groove 12 may be provided Seal ring 50. Of course, in addition to providing the sealing ring between the isolation groove 13 and the annular groove, a sealing ring may be provided between the respective annular grooves to prevent liquid mutual entanglement between the different annular grooves.

In order to enhance the sealing effect, it is further preferred that, as shown in Fig. 4, the seal ring 50 may include an O-ring 51 and a grid 52 disposed outside the O-ring 51. When an alkaline washing liquid (e.g., soapy water) is introduced into the second annular groove 12, the O-ring 51 and the Glyd ring 52 can have an alkali-proof property, thereby preventing the O-ring 51 and the Glyd ring 52 from being corroded.

For ease of processing, preferably, a flow guiding hole 22 may be provided in the casing 20, which communicates the isolation groove 13 with the outside of the casing 20. Further preferably, the flow guiding holes 22 are disposed along the radial direction of the housing 20.

Preferably, the swivel joint according to the present invention may further include a draft tube 30 and a liquid collection bottle 40, the liquid collection bottle 40 is disposed outside the casing 10, and the draft tube 30 passes the liquid collection bottle through the flow guiding hole 22. 40 is in communication with the isolation slot 13. The liquid flowing into the isolation tank 13 can be easily guided to the outside of the casing 20 by the draft tube 30.

For ease of observation, preferably, the liquid collection bottle 40 is transparent. For example, when the seal failure between the first annular groove 11 and the isolation groove 13 is leaked, the liquid in the liquid collection bottle 40 is mostly hydraulic oil, and if the seal between the second annular groove 12 and the isolation groove 13 fails, The liquid in the liquid collection bottle 40 is mostly water or a washing liquid. The position at which the leak occurs can be judged by observing the color of the liquid in the liquid collection bottle 40, and the seal ring 50 at the position can be replaced.

The first annular groove 11, the second annular groove 12 and the isolation groove 13 may be disposed on the outer surface of the core 10 or on the inner surface of the casing 20. For ease of processing, the first annular groove 11, the first At least one of the two annular grooves 12 and the isolation grooves 13 is provided on the outer surface of the core 10. Preferably, the first annular groove 11, the second annular groove 12, and the isolation groove 13 are all disposed on the outer surface of the core 10. Thus, the first annular groove 11, the second annular groove 12, and the isolation groove 13 can be obtained by ordinary turning.

Usually, there are a plurality of first annular grooves 11, and/or a plurality of second annular grooves 12. For example, as shown in Fig. 1, three first annular grooves 11 and two second annular grooves 12 are two. The number of annular grooves and isolation grooves 13 is determined by the specific function of the swivel joint.

Preferably, as shown in Figures 1, 2 and 3, the first passage 21 is disposed on the housing 20 in a radial direction to facilitate machining of the first passage 21.

Preferably, the second passage 14 includes an axial bore 14a extending in the axial direction of the core 10 and a radial bore 14b extending along the radial direction of the core 10, the radial bore 14b enclosing the axial bore 14a with the first ring The groove 11 or the second annular groove 12 is in communication. This form of second passage 14 is also very easy to obtain.

When the corrosive liquid such as the washing liquid is introduced, in order to prevent the core and the casing from being corroded, preferably, the outer surface of the core 10, the inner surface of the casing 20, the inner surface of the first passage 21, and the second passage 14 are provided. At least one of the inner surfaces is provided with a chrome plating layer.

As another aspect of the present invention, a sanitation vehicle is provided, the sanitation vehicle including a swivel joint, wherein the swivel joint is the above-described swivel joint provided in the present invention.

When the swivel joint according to the present invention is used for a sanitation vehicle, it is necessary to provide a shift fork 70 on the outer side of the casing 20 and a connecting plate 60 on the lower portion of the core body 10. When the swivel joint is installed, the shift fork 70 is fixedly attached to the upper platform 80 of the sanitation vehicle, and the connecting plate 60 is fixedly attached to the lower platform 90. When the upper platform 80 rotates, the shift fork 70 is rotated to drive the housing 20 to rotate. Further, when the swivel joint of the present invention is used for a sanitation vehicle, it is connected to the second passage 14 through the steel pipe 15 to transfer hydraulic oil, water, washing liquid, and the like.

The hydraulic oil passes into the first annular groove 11 from the first passage 21 (second passage 14) corresponding to the first annular groove 11, and flows into the second passage 14 (the first passage 21) through the first annular groove 11 Transfer hydraulic oil from the upper part (lower part) of the swivel joint to the lower part (upper part) of the swivel joint. Water or washing liquid flows into the second annular groove 12 from the first passage 21 corresponding to the second annular groove 12, and flows into the second passage 14 corresponding to the second annular groove 12 through the second annular groove 12, and passes through versus The steel pipe 15 that communicates with the second passage 14 flows out of the swivel joint. If the hydraulic oil in the first annular groove 11 leaks, the hydraulic oil in the first annular groove 11 flows into the isolation groove 13 along the gap between the core 10 and the casing 20, and is led out from the isolation groove 13. It is outside the casing 20 and does not flow into the second annular groove 12. Similarly, if the liquid in the second annular groove 12 leaks, the leaked liquid also flows into the isolation groove 13 and is led out of the isolation groove 13 to the outside of the casing 20 without flowing into the first annular groove 12. Thereby, the liquid in the first annular groove 11 and the second annular groove 12 is prevented from colliding with each other.

The specific working principle of the swivel joint has been described in detail above, and it is no longer preferred here that the sanitation vehicle is a wall washer. Hydraulic oil is introduced into the first annular groove 11, and water and/or washing liquid is introduced into the second annular groove 12 to clean the wall of the building.

Generally, in the swivel joint for a wall washer, the number of the first annular grooves 11 is three, and the number of the second annular grooves 12 is two, and accordingly, the numbers of the first passage and the second passage are respectively Five. The three first annular grooves 11 are each for the passage of hydraulic oil, one of the two second annular grooves 12 for introducing water, and the other for introducing a washing liquid (e.g., soapy water, etc.). Thereby cleaning the wall.

Of course, the sanitation vehicle according to the present invention is not limited to a wall washing vehicle, but may also be a variety of sanitation vehicles such as a road cleaning vehicle and a water sprinkler.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention. It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and should also be regarded as the disclosure of the invention.

Claims

Rights request

A swivel joint comprising a core (10) and a casing (20) sleeved outside the core (10), the casing (20) and the core (10) being capable of being Relatively rotating, an annular groove is formed between the core body (10) and the casing (20), and the annular groove passes through the first passage (21) and the core body on the casing (20) ( a second passage (14) in 10) is in communication with an exterior of the swivel joint, wherein the annular groove includes a first annular groove (11), a second annular groove (12), and a first annular groove disposed therein An isolation groove (13) between the groove (11) and the second annular groove (12), the isolation groove (13) communicating with the outside of the casing (20).

2. The swivel joint according to claim 1, wherein the isolation groove (13) and the first annular groove (11), and/or the isolation groove (13) and the first Two annular groove

A seal ring (50) is provided between (12).

The swivel joint according to claim 2, characterized in that the seal ring (50) comprises an O-ring (51) and a G-ring (52) disposed outside the O-ring (51).

The swivel joint according to claim 1, wherein the casing (20) is provided with a flow guiding hole (22), and the guiding hole (22) places the isolation groove (13) The external connection of the housing (20).

The swivel joint according to claim 4, further comprising a draft tube (30) and a liquid collecting bottle (40), the liquid collecting bottle (40) being disposed in the housing (10) Externally, the draft tube (30) communicates the liquid collection bottle (40) with the isolation tank (13) through the flow guiding hole (22).

The swivel joint according to claim 5, characterized in that the liquid collection bottle (40) is transparent.

The swivel joint according to claim 1, wherein at least one of the first annular groove (11), the second annular groove (12) and the isolation groove (13) is disposed at On the outer surface of the core (10).

The swivel joint according to claim 1, characterized in that the first annular groove (11) is plural, and/or the second annular groove (12) is plural.

The swivel joint according to claim 1, characterized in that the first passage (21) is disposed on the casing (20) in a radial direction.

10. A swivel joint according to claim 1 wherein said second passage (14) includes an axial bore (14a) extending along the axial direction of said core (10) and along said core a radially extending radial bore (14b) of (10), the radial bore (14b) and the first annular groove (11) or the second annular groove (12) ) Connected.

The swivel joint according to claim 1, wherein an outer surface of the core body (10), an inner surface of the casing (20), an inner surface of the first passage (21), and A chrome plating layer is disposed on at least one of the inner surfaces of the second passages (14).

12. A sanitation vehicle comprising a swivel joint, characterized in that the swivel joint is a swivel joint according to any one of claims 1 to 11.

13. The sanitation vehicle according to claim 12, wherein the sanitation vehicle is washed Wall car.

The sanitation vehicle according to claim 13, wherein in the swivel joint, the number of the first annular grooves (11) is three, and the number of the second annular grooves (12) is two. And correspondingly, the number of the first channel (21) and the second channel (14) is five