Throttling type rotary joint

Abstract

The utility model relates to the technical field of rotating joints, and discloses a throttling type rotating joint which comprises a shell and a rotating sleeve rotationally connected with the shell, a medium flow channel is arranged on the side face of the shell, an annular step face is arranged on the inner wall of the shell, a throttling seat is fixedly arranged on the annular step face, a plurality of throttling through holes are formed in the throttling seat, and the throttling through holes are communicated with the medium flow channel. The axis of each throttling through hole is parallel to the axis of the rotating sleeve; an adjusting seat is arranged on the inner side of the throttling seat, a plurality of throttling columns matched with the throttling through holes are arranged on the outer end face of the adjusting seat, the throttling columns are correspondingly inserted into the throttling through holes to form clearance fit, flow guide holes are formed in the centers of the throttling columns, and throttling grooves communicated with the flow guide holes are formed in the surfaces of the throttling columns; a driving assembly used for driving the adjusting seat to be close to or away from the throttling seat is arranged on the shell. The utility model has the beneficial effects that the medium flow can be adjusted, and the adjustment is very convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary joint technical field especially relates to a throttling rotary joint. BACKGROUND

[0002] Rotary joint is a kind of pipeline connecting component, usually used to convey medium from static pipeline to rotary pipeline, and is widely applied in chemical industry, metallurgy, mechanical processing cooling and biological medicine field.The function of the existing rotary joint is relatively single, usually cannot adjust the flow of medium, therefore cannot adapt to the emergency of some equipment, for example, when the valve flow of medium inlet on the equipment is damaged, immediate shutdown and replacement are needed, if the rotary joint connected with the equipment is equipped with flow adjustment, the equipment can continue to operate, and the shutdown maintenance time can be more flexible. SUMMARY

[0003] The utility model discloses in order to solve the above -mentioned problems in prior art, provide a throttling rotary joint that can adjust medium flow, adjust very conveniently.

[0004] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0005] A kind of throttling rotary joint, including shell, with the rotation connection of shell rotating sleeve, the side of the shell is equipped with medium flow passage, the inner wall of the shell is equipped with annular stepped surface, the annular stepped surface is equipped with throttling seat, the throttling seat is equipped with several throttling through holes, the axis of each throttling through hole is parallelly distributed with the axis of rotating sleeve;The inner side of the throttling seat is equipped with adjusting seat, the outer end surface of the adjusting seat is equipped with several throttling columns compatible with throttling through hole, the throttling column is inserted into throttling through hole to form clearance fit correspondingly, the center of the throttling column is equipped with flow guide hole, the surface of the throttling column is equipped with throttling groove communicated with flow guide hole;The shell is equipped with the drive assembly for driving adjusting seat to be close to or away from throttling seat, when the distance between adjusting seat and throttling seat changes, the medium flow at throttling through hole changes synchronously.

[0006] By adopting the above technical scheme: utilize throttling seat and adjusting seat cooperation structure, by axial displacement adjusting column to realize the gradual change regulation of throttling through hole medium, the flow regulation range can reach the continuous regulation of full open state to complete closure, adjust very conveniently, and the regulation precision is high;When medium passes through throttling through hole, can reduce medium flow rate by throttling, and then reduce cavitation phenomenon.

[0007] As preferred, the driving assembly comprises a driving shaft, a handle connected with the driving shaft, the driving shaft is connected with the shell in rotation sealing mode, the inner end of the driving shaft is provided with a screw rod, the adjusting seat is provided with a screw sleeve sleeved on the screw rod and connected with the screw rod in threaded mode; when the distance between the adjusting seat and the throttling seat reaches the maximum, the outer end of the throttling column is located in the throttling through hole; when the distance between the adjusting seat and the throttling seat reaches the minimum, the throttling through hole is completely closed. The precise displacement adjustment of the throttling column is realized by rotating the handle and using the screw rod and the screw sleeve.

[0008] As preferred, the throttling grooves are distributed along the axial direction of the throttling column; a plurality of throttling grooves are arranged on each throttling column and uniformly distributed on the circumferential surface of the throttling column.

[0009] As preferred, the inner end surface of the throttling column is provided with an annular groove, and a first sealing ring is arranged in the annular groove. When the throttling column is completely inserted into the throttling through hole, the first sealing ring is completely closed.

[0010] As preferred, the edge of the throttling seat is fixedly connected with the annular stepped surface through a bolt, the outer end edge of the throttling seat is provided with a convex ring, and a second sealing ring is arranged between the inner wall of the convex ring and the outer side wall of the inner end of the rotating sleeve.

[0011] As preferred, the outer side surface of the rotating sleeve is provided with an annular limiting boss, a first bearing is arranged between the annular limiting boss and the convex ring, an end cover is arranged at the outer end of the shell, and a second bearing is arranged between the annular limiting boss and the end cover. Through the cooperation of the first bearing and the second bearing, the rotation of the rotating sleeve is more stable.

[0012] As preferred, the first bearing and the second bearing are both configured as thrust bearings, the inner end of the second bearing is provided with a third bearing, and the third bearing is configured as a deep groove ball bearing. The thrust bearing can bear greater axial impact force, and the third bearing further improves the rotation stability.

[0013] As preferred, the annular gap is formed between the inner wall of the convex ring and the shell, a shock absorbing washer is arranged in the annular gap, and the outer end of the shock absorbing washer abuts against the inner end surface of the first bearing. When the axial direction of the rotating sleeve is impacted, the shock absorbing washer can play a buffering and energy absorbing role.

[0014] Therefore, the utility model has the beneficial effects of adjustable medium flow and convenient adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the utility model.

[0016] Figure 2 It is an isometric view of Figure 1 .

[0017] Figure 3 for Figure 1 A sectional view.

[0018] Figure 4 for Figure 1 Exploded view.

[0019] Figure 5 This is a schematic diagram showing the fit between the adjusting seat and the throttling seat.

[0020] Figure 6 This is a schematic diagram showing the throttling column closing the throttling orifice.

[0021] Figure 7 This is a structural diagram of the adjusting seat and adjusting column. Detailed Implementation

[0022] To make the technical problem to be solved, the technical solution, and the beneficial technical effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of protection of the present utility model.

[0023] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0024] like Figures 1-7 The illustrated throttling rotary joint includes a housing 1 and a rotating sleeve 2 rotatably connected to the housing 1. The housing 1 has a medium flow channel 100 on its side. The housing 1 has an annular stepped surface 101 on its inner wall, and a throttling seat 3 is fixed on the annular stepped surface 101. The throttling seat 3 has several throttling orifices 30, the axis of each throttling orifice 30 being parallel to the axis of the rotating sleeve 2. An adjusting seat 4 is located inside the throttling seat 3. Several throttling columns 40, adapted to the throttling orifices 30, are located on the outer end face of the adjusting seat 4. The throttling columns 40 are inserted into the throttling orifices 30 to form a clearance fit. A guide hole 400 is located at the center of each throttling column 40, and a throttling groove 401 communicating with the guide hole 400 is located on the surface of the throttling column 40. A driving assembly 5 is provided on the housing 1 to drive the adjusting seat 4 closer to or further away from the throttling seat 3. When the distance between the adjusting seat 4 and the throttling seat 3 changes, the medium flow rate at the throttling orifice 30 changes synchronously.

[0025] The drive assembly 5 comprises a drive shaft 50, a handle 51 connected with the drive shaft 50, the drive shaft 50 is in rotationally sealed connection with the shell 1, the inner end of the drive shaft 50 is provided with a screw rod 52, the adjusting seat 4 is provided with a screw sleeve 41 sleeved on the screw rod 52 and in threaded connection with the screw rod 52; when the distance between the adjusting seat 4 and the throttling seat 3 reaches the maximum, the outer end of the throttling column 40 is in the throttling through hole 30; when the distance between the adjusting seat 4 and the throttling seat 3 reaches the minimum, the throttling through hole 30 is completely closed.

[0026] As shown in Figure 7 The throttling grooves 401 are distributed along the axial direction of the throttling column 40; a plurality of throttling grooves 401 are arranged on each throttling column 40 and are uniformly distributed on the circumferential surface of the throttling column 40. The inner end surface of the throttling column 40 is provided with an annular groove 402, and the annular groove 402 is provided with a first sealing ring 403.

[0027] The edge of the throttling seat 3 is fixedly connected with the annular stepped surface 101 through a bolt 31, the outer end edge of the throttling seat 3 is provided with a convex ring 32, the inner end outer side wall of the rotating sleeve 2 and the inner wall of the convex ring 32 are provided with a second sealing ring 33, the convex ring 32 and the inner wall of the shell 1 form an annular gap, the annular gap is provided with a shock absorbing washer 7, and the outer end of the shock absorbing washer 7 abuts against the inner end surface of the first bearing 21.

[0028] The outer side surface of the rotating sleeve 2 is provided with an annular limiting boss 20, the annular limiting boss 20 and the convex ring 32 are provided with the first bearing 21, the outer end of the shell 1 is provided with an end cover 6, and the annular limiting boss 20 and the end cover 6 are provided with the second bearing 22. The first bearing 21 and the second bearing 22 are both configured as thrust bearings, the inner end of the second bearing 22 is provided with a third bearing 23, and the third bearing 23 is configured as a deep groove ball bearing.

[0029] The principle of the utility model is as follows in combination with the drawings: as shown in Figure 3 The throttling seat is arranged in the shell, a plurality of throttling through holes are arranged on the throttling seat, the medium flow rate can be slowed down when passing through the throttling through holes, and thus the cavitation phenomenon is reduced; the adjusting seat and the throttling column are arranged, cooperate with the throttling through holes, and the precise adjustment of the medium flow rate is realized, and the pain point that the traditional rotary joint cannot adjust the flow rate is solved. The throttling seat and the adjusting seat are used in cooperation, the throttling through holes are gradually adjusted by the axial displacement adjusting column, the flow rate adjustment range can reach the continuous adjustment from the full opening state to the completely closed state, the adjustment is very convenient, and the adjustment precision is high.

[0030] In the description of the utility model, need understanding is, up and down, left and right, inner end, outer end, one end, another end and so on the direction or position relation indicated based on the position or position relation shown in the drawing, only is for more clearly convenient for describing the technical scheme of the utility model, and is not the device or the element indicated or implied must have a specific direction, with a specific position structure and operation, can not be understood as the limitation to the utility model.

[0031] Although the specific embodiments of the utility model are described in detail here, they are only given for the purpose of explanation, and should not be considered as limiting the scope of the utility model. Various substitutions, changes and modifications can be conceived without departing from the spirit and scope of the utility model.

Claims

1. A throttling rotary joint comprising a housing (1), a rotating sleeve (2) rotatably connected to the housing (1), a side surface of the housing (1) being provided with a medium flow channel (100), characterized in that, The inner wall of the shell (1) is provided with an annular stepped surface (101), the annular stepped surface (101) is fixed with a throttling seat (3), the throttling seat (3) is provided with a plurality of throttling through holes (30), and the axis of each throttling through hole (30) is parallel to the axis of the rotating sleeve (2); The inner side of the throttling seat (3) is provided with an adjusting seat (4), the outer end surface of the adjusting seat (4) is provided with a plurality of throttling columns (40) matched with the throttling through holes (30), the throttling columns (40) are correspondingly inserted into the throttling through holes (30) to form a clearance fit, the center of the throttling column (40) is provided with a flow guide hole (400), and the surface of the throttling column (40) is provided with a throttling groove (401) in communication with the flow guide hole (400). The shell (1) is provided with a driving assembly (5) for driving the adjusting seat (4) to move close to or away from the throttling seat (3), and when the distance between the adjusting seat (4) and the throttling seat (3) changes, the medium flow at the throttling through hole (30) changes synchronously.

2. A restricted rotary union as defined in claim 1, wherein, The driving assembly (5) comprises a driving shaft (50) and a handle (51) connected with the driving shaft (50), the driving shaft (50) penetrates through the shell (1) and is in rotating sealing connection with the shell (1), the inner end of the driving shaft (50) is provided with a screw rod (52), and the adjusting seat (4) is provided with a screw sleeve (41) sleeved on the screw rod (52) and in threaded connection with the screw rod (52). When the distance between the adjusting seat (4) and the throttling seat (3) reaches the maximum, the outer end of the throttling column (40) is in the throttling through hole (30); when the distance between the adjusting seat (4) and the throttling seat (3) reaches the minimum, the throttling through hole (30) is completely closed.

3. A rotary union according to claim 1 or 2, characterised in that, The throttling groove (401) is distributed along the axial direction of the throttling column (40); a plurality of throttling grooves (401) are arranged on each throttling column (40), and the plurality of throttling grooves (401) are uniformly distributed on the circumferential surface of the throttling column (40).

4. A restricted rotary union according to claim 3, wherein, The inner end surface of the throttling column (40) is provided with an annular groove (402), and the annular groove (402) is provided with a first sealing ring (403).

5. A rotary union according to claim 1 or 2, characterised in that, The edge of the throttling seat (3) is fixedly connected with the annular stepped surface (101) through a bolt (31), the outer end edge of the throttling seat (3) is provided with a convex ring (32), and the inner wall of the convex ring (32) is provided with a second sealing ring (33) between the inner end outer side wall of the rotating sleeve (2) and the inner wall of the convex ring (32).

6. A restricted rotary union according to claim 5, wherein, The outer side of the rotating sleeve (2) is provided with an annular limiting boss (20), the first bearing (21) is arranged between the annular limiting boss (20) and the convex ring (32), the outer end of the shell (1) is provided with an end cover (6), and the second bearing (22) is arranged between the annular limiting boss (20) and the end cover (6).

7. A rotary union according to claim 6, wherein, The first bearing (21) and the second bearing (22) are both configured as thrust bearings, the inner end of the second bearing (22) is provided with a third bearing (23), and the third bearing (23) is configured as a deep groove ball bearing.

8. A restricted rotary union as defined in claim 6, wherein, The convex ring (32) is formed with an annular gap at the inner wall of the shell (1), a shock absorbing washer (7) is arranged in the annular gap, and the outer end of the shock absorbing washer (7) abuts against the inner end face of the first bearing (21).

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