CN217874683U

CN217874683U - Rotary joint for push bench

Info

Publication number: CN217874683U
Application number: CN202221986499.4U
Authority: CN
Inventors: 唐夕明; 张云峰; 郭攀; 时磊; 吴杨
Original assignee: Anhui Tangxing Equipment Technology Co Ltd
Current assignee: Anhui Tangxing Equipment Technology Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-22
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a rotary joint for a pipe pushing jack, which relates to the technical field of rotary joint sealing, and comprises a shell and an inner pipe, wherein the inner pipe is coaxially arranged in the shell, a bearing is arranged between the shell and the inner pipe for supporting the inner pipe, and a rotary sealing ring and a water sealing ring are sequentially arranged between the shell and the inner pipe along the flow direction of high-pressure water flow; the utility model uses a plurality of sealing rings to realize reliable sealing effect, and the bearing supports the inner tube to ensure that the relative rotation between the inner tube and the shell as well as between the inner tube and the end cover is stable and reliable; the sealing performance of the lubricating oil sealing cavity is ensured by using a plurality of sealing structures, and high-pressure water is sealed by the sealing structures after entering from the end covers, cannot enter the sealing cavity and cannot leak out, and only enters the main shaft through the inner pipe; in addition, the external water pipe, the inner pipe and the main shaft are connected through sealing threads, the structure is compact and reasonable, the cost is low, the replacement and the maintenance are very convenient through threaded connection, and the construction efficiency is improved.

Description

Rotary joint for push bench

Technical Field

The utility model relates to a rotary joint seals technical field, specifically is a rotary joint for pipe push bench.

Background

At present, the pipe pushing jack belongs to a non-excavation engineering machine, and rock or soil layer extrusion cutting are realized through the blade disc and the aircraft nose advances forward and then realize the laying work of tubular product. The pipe jacking machine is characterized in that a cutter head continuously extrudes and crushes a rock stratum or cuts a soil layer in the construction jacking process, a cutter can generate a large amount of heat to damage the cutter or wet soil is adhered to the cutter in the process, so that the cutter cannot continuously cut the soil layer, at the moment, high-pressure water is usually communicated to the cutter head from the outside, and the high-pressure water finally reaches the cutter head through an external water pipe, a rotary joint and a power main shaft. The high-pressure water washes the cutter head and the cutter to take away heat generated when the crushed rock is extruded, so that the cutter is protected, and the high-pressure water can wash away clay adhered to the cutter head and the cutter, so that the cutter can effectively cut a soil layer.

The rotary joint for high-pressure water of the push bench in the prior art is designed into a whole with a main shaft, the replacement and the maintenance are very inconvenient, and the hard sealing of the rotary joint is easy to abrade and leak water. Therefore, the rotary joint for the push bench is compact and reasonable in structure, good in sealing effect and very convenient to replace when leakage occurs.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, an object of the utility model is to provide a rotary joint for push bench.

The utility model discloses can realize through following technical scheme: the utility model provides a rotary joint for pipe pushing jack, includes shell and inner tube, the coaxial setting of inner tube is provided with the bearing and is used for supporting the inner tube in the shell between shell and the inner tube, along high-pressure rivers flow direction, has set gradually rotary seal circle and water seal sealing washer between shell and inner tube.

The utility model discloses a further technological improvement lies in: the two ends of the shell are respectively and fixedly connected with an end cover and a transparent cover, a first O-shaped ring is arranged between the shell and the end cover, and a second O-shaped ring is arranged between the shell and the transparent cover.

The utility model discloses a further technological improvement lies in: the contact part inboard of passing through lid and inner tube is provided with the skeleton oil blanket, shell, water seal sealing washer, second O type circle, skeleton oil blanket, pass through and form the sealed chamber that is used for storing bearing lubricating oil between lid and the inner tube.

The utility model discloses a further technological improvement lies in: an oil injection nozzle is arranged on the shell in a penetrating way, the bottom of the oil injection nozzle is arranged in a cavity between the two bearings, and lubricating oil is injected into the cavity.

The utility model discloses a further technological improvement lies in: the installation positions of the rotary sealing ring, the water seal sealing ring and the bearing are all arranged on the shell.

The utility model discloses a further technological improvement lies in: one end of the end cover is provided with a sealing thread used for connecting a water inlet pipe, and one end of the inner pipe, which is far away from the end cover, is provided with a sealing thread used for connecting a main shaft.

Compared with the prior art, the utility model discloses possess following beneficial effect:

the utility model realizes reliable sealing effect by using various sealing rings, and enables the relative rotation between the inner pipe and the shell as well as between the inner pipe and the end cover to be stable and reliable by bearing supporting the inner pipe; the sealing performance of the lubricating oil sealing cavity is ensured by using a plurality of sealing structures, and high-pressure water is sealed by the sealing structures after entering from the end covers, cannot enter the sealing cavity and cannot leak out, and only enters the main shaft through the inner pipe; in addition, the external water pipe, the inner pipe and the main shaft are connected through sealing threads, the structure is compact and reasonable, the cost is low, the replacement and the maintenance are very convenient through threaded connection, and the construction efficiency is improved.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a rotary joint of the present invention;

fig. 2 is a schematic view of the installation and use of the present invention.

In the figure: 1. an end cap; 2. a first O-ring; 3. a housing; 4. rotating the sealing ring; 5. a water seal sealing ring; 6. a bearing; 7. a second O-ring; 8. framework oil seal; 9. a transparent cover; 10. an inner tube; 11. An oil injection nozzle; 12. a spacer sleeve; 13. a retainer ring; 14. a connecting bolt; 101. a power spindle; 102. a swivel joint body; 103. an outer water tube.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1-2, a rotary joint for a push bench includes a rotary joint body 102 disposed between an external water pipe 103 and a power spindle 101, and high-pressure water enters the rotary joint body 102 through the static external water pipe 103;

the rotary joint body 102 comprises an end cover 1, sealing threads are arranged on the inner side of the end part of the end cover 1, the end part of the external water pipe 103 is connected through the end cover 1 with the sealing threads, and one end, far away from the external water pipe 103, of the end cover 1 is fixedly connected with a shell 3 through bolts; the end cover 1 is connected with the external water pipe 103 in a non-rotating manner, the shell 3 is connected with the end cover 1 in a non-rotating manner, and a first O-shaped ring 2 is arranged between the shell 3 and the end cover 1;

an inner pipe 10 is coaxially arranged in the shell 3, two bearings 6 are arranged on the outer side of the inner pipe 10, the inner pipe 10 is supported by the two bearings 6 and can rotate relative to the shell 3, and a sealing thread is arranged on the outer side of one end, far away from the end cover 1, of the inner pipe 10 and is fixedly connected with the power spindle 101 through the sealing thread; a spacer 12 is arranged between the two bearings 6, a retainer ring 13 is arranged on one side of each of the two bearings 6 far away from the spacer 12, and the bearings 6 are axially positioned through the spacer 12 and the retainer ring 13;

one side of the outer shell 3, which is far away from the end cover 1, is fixedly connected with a through cover 9 through a connecting bolt 14, a second O-shaped ring 7 is arranged between the outer shell 3 and the through cover 9, and a framework oil seal 8 is arranged on the inner side of the contact part of the through cover 9 and the inner pipe 10; a rotary sealing ring 4 and a water sealing ring 5 are sequentially arranged between the outer shell 3 and the inner pipe 10 along the flow direction of the high-pressure water flow;

a sealing cavity is formed among the shell 3, the water seal sealing ring 5, the second O-shaped ring 7, the framework oil seal 8, the transparent cover 9 and the inner pipe 10 and is used for storing bearing lubricating oil; high-pressure water enters from an external water pipe 103 through an end cover 1, is sealed by a first O-shaped ring 2, a shell 3, a rotary sealing ring 4 and a water seal sealing ring 5, cannot enter a sealing cavity and cannot leak out, and only enters a power main shaft 101 through an inner pipe 10;

an oil nozzle 11 is arranged on the shell 3 in a penetrating way, the bottom of the oil nozzle 11 is arranged in a cavity between the two bearings 6, and lubricating oil is injected into the cavity.

It should be noted that the installation positions of the rotary seal ring 4, the water seal ring 5 and the bearing 6 are all arranged on the housing 3, so as to ensure the coaxiality of the inner tube 10, the rotary seal ring 4 and the water seal ring 5.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments that do not depart from the technical scope of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a rotary joint for pipe pushing jack, includes shell (3) and inner tube (10), inner tube (10) coaxial setting is in shell (3), its characterized in that, be provided with bearing (6) between shell (3) and inner tube (10) and be used for supporting inner tube (10), along the high-pressure rivers flow direction, have set gradually rotary seal circle (4) and water seal sealing washer (5) between shell (3) and inner tube (10).

2. The rotary joint for a push bench according to claim 1, wherein the two ends of the outer shell (3) are fixedly connected with an end cover (1) and a transparent cover (9), respectively, a first O-ring (2) is arranged between the outer shell (3) and the end cover (1), and a second O-ring (7) is arranged between the outer shell (3) and the transparent cover (9).

3. The rotary joint for the push bench according to claim 2, wherein a skeleton oil seal is arranged on the inner side of the contact portion of the transparent cover (9) and the inner pipe (10), and a sealing cavity for storing bearing lubricating oil is formed among the outer shell (3), the water seal sealing ring (5), the second O-ring (7), the skeleton oil seal (8), the transparent cover (9) and the inner pipe (10).

4. Swivel joint for push bench according to claim 1, characterized in that an oil nozzle (11) is provided through the housing (3), and the bottom of the oil nozzle (11) is disposed in the cavity between the two bearings (6) and is filled with lubricating oil.

5. The rotary joint for push bench according to claim 1, wherein the mounting positions of rotary seal ring (4), water seal ring (5) and bearing (6) are all arranged on the housing (3).

6. The rotary joint for push bench according to claim 2, wherein one end of the end cap (1) is provided with a sealing thread for connecting with a water inlet pipe, and one end of the inner pipe (10) far away from the end cap (1) is provided with a sealing thread for connecting with a main shaft.