CN211059577U

CN211059577U - Elbow joint for fluid connection

Info

Publication number: CN211059577U
Application number: CN201922280028.6U
Authority: CN
Inventors: 朴圣实
Original assignee: Changzhou Benze Hydraulic Technology Co ltd
Current assignee: Hualai (Changzhou) Hydraulic Technology Co.,Ltd.
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-07-21
Anticipated expiration: 2029-12-18

Abstract

The utility model belongs to the technical field of the pipe fitting, concretely relates to elbow fitting for fluid coupling. The elbow joint for fluid connection comprises a joint body with a cavity, wherein external threads connected with adjacent pipe bodies are respectively arranged at two ends of the joint body, and the joint body is of a bent structure; the inner surface of the cavity is a smooth arc, and the cavity is an isometric arc-shaped body; the inner sides of the joint bodies are respectively coated with an anti-corrosion layer, and the anti-corrosion layers are epoxy paint or polytetrafluoroethylene coatings. The inner cavity of the elbow joint of the structure is an equal-diameter arc-shaped body, and particularly the transmission pressure of pressure fluid cannot be changed due to the change of the volume when the fluid flows through the cavity in the fluid transmission process, so that the pressure transmission is stable, and the loss is reduced; smooth arc transition, no fluid transmission dead angle inside, no vortex, and reduced noise during fluid flow.

Description

Elbow joint for fluid connection

Technical Field

The utility model belongs to the technical field of the pipe fitting, concretely relates to elbow fitting for fluid coupling.

Background

The pipe joint is a connecting tool between pipelines, is a connecting point between an element and the pipelines which can be disassembled and assembled, plays an indispensable important role in pipe fittings, is used in fluids (hydraulic oil, water and gas) of agricultural machinery, engineering machinery, automobiles and the like, and is used for connecting and transmitting media.

The inner wall of the existing elbow joint is a right angle, as shown in fig. 1, a drilling machine is usually adopted to rotate the hole in the elbow joint, and the processing is difficult; because the inner wall of the elbow joint is a right angle, a fluid medium has a medium dead angle in the conveying process, particularly the conveying of a pressure medium, and a vortex exists in the conveying process.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: to the above-mentioned defect, the utility model provides a return bend for fluid coupling connects, and the inner wall is the circular arc, and pressure transmission is stable, and it is convenient to use.

The utility model provides a technical scheme that its technical problem adopted as follows: the elbow joint for fluid connection comprises a joint body with a cavity, wherein external threads connected with adjacent pipe bodies are respectively arranged at two ends of the joint body, and the joint body is of a bent structure; the inner surface of the cavity is a smooth arc, and the cavity is an equal-diameter arc body. The cavity in the elbow joint is an equal-diameter arc-shaped body, and in the process of fluid transmission, particularly the transmission pressure of pressure fluid cannot be changed due to the change of the volume when the fluid flows through the cavity, so that the pressure transmission is stable, and the loss is reduced; smooth arc transition, no fluid transmission dead angle inside, no vortex, and reduced noise during fluid flow.

Further, the external screw thread structures of setting at joint body both ends are the same, the external screw thread includes first screw thread and second screw thread, and first screw thread and second screw thread interval are the width of second screw thread, and first screw thread and second screw thread setting are at the same end of joint body. There is no screw thread interval between first screw thread and second screw thread, adopts to cut off the screw thread promptly, can directly perceivedly judge whether connect the fastening and whether there is the seepage in junction when elbow fitting is connected with adjacent body, and it is convenient to overhaul.

Furthermore, the corrosion-resistant layers are coated on the inner sides of the joint bodies and are epoxy paint, polytetrafluoroethylene coatings or electroplating coatings, and the corrosion of hydraulic oil, water, gas and other fluids to the inside of the elbow joint can be effectively avoided due to the arrangement of the corrosion-resistant layers, wherein the epoxy paint, the polytetrafluoroethylene coatings or the electroplating coatings have wide universality, and the service life of the elbow joint is greatly prolonged.

Further, the outer side wall of the joint body is further coated with a fixing plate, and the fixing plate is attached to the outer side wall of the joint body; the outer side of the joint body is provided with a bent pipe heat-insulating sleeve, and the bent pipe heat-insulating sleeve is used for sealing and coating the outer thread part and the fixing plate on the joint body. By arranging the fixing plate, the connection strength of the large-turning part of the joint body can be increased; the bent pipe heat insulation sleeve is added, so that energy loss during high-temperature or low-temperature fluid transmission can be avoided, the output pressure of the fluid is reduced, and the pressure fluid is stably transmitted.

Furthermore, connect body both ends to be the regular hexagon body, the external screw thread setting is in the regular hexagon body periphery promptly, the external screw thread is the regular hexagon external screw thread, the external screw thread is continuous thread circle. Set up to regular hexagon body with joint body both ends, threaded connection power when elbow fitting is connected with adjacent body can be improved, connect the fastening, circumstances such as elbow fitting department can not take place to leak.

Furthermore, the inner diameter of the cavity is 3 mm-30 mm, the wall thickness of the joint body is 14 mm-41 mm, and the bending angle of the joint body is 30-150 degrees.

The utility model has the advantages that: by adopting the scheme, the cavity in the elbow joint is the equal-diameter arc-shaped body, and particularly the transmission pressure of the pressure fluid can not be changed due to the change of the volume when the fluid flows through the cavity in the fluid transmission process, so that the pressure transmission is stable, and the loss is reduced; smooth arc transition, no fluid transmission dead angle in the interior, no vortex, and reduced noise when fluid flows; a thread-free space exists between the first thread and the second thread, namely, a partition thread is adopted, so that whether connection is fastened or not and whether leakage exists at the connection part or not can be visually judged when the elbow joint is connected with an adjacent pipe body, and the maintenance is convenient; the corrosion-resistant layer can effectively prevent the fluid such as hydraulic oil, water, gas and the like from corroding the inside of the elbow joint, wherein the epoxy paint or polytetrafluoroethylene coating has wider universality, and the service life of the elbow joint is greatly prolonged; by arranging the fixing plate, the connection strength of the large-turning part of the joint body can be increased; the bent pipe heat insulation sleeve is added, so that energy loss during high-temperature or low-temperature fluid transmission can be avoided, the output pressure of the fluid is reduced, and the pressure fluid is stably transmitted; set up to regular hexagon body with joint body both ends, threaded connection power when elbow fitting is connected with adjacent body can be improved, connect the fastening, circumstances such as elbow fitting department can not take place to leak.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a prior art elbow fitting;

fig. 2 is a schematic structural view of embodiment 1 of the present invention;

fig. 3 is a schematic structural view of embodiment 2 of the present invention;

fig. 4 is a schematic structural view of embodiment 3 of the present invention;

fig. 5 is a side view of the joint of embodiment 3 of the present invention;

wherein: 1 is the cavity, 2 is the joint body, 3 is the fixed plate, 4 is corrosion-resistant layer, 5 is the external screw thread, 51 is first screw thread, 52 is the second screw thread, 6 is the return bend insulation cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 2, the elbow joint for fluid connection includes a joint body 2 having a cavity 1, wherein two ends of the joint body 2 are respectively provided with an external thread 5 connected to an adjacent pipe body, and the joint body 2 is of a bent structure; the inner surface of the cavity 1 is a smooth arc, the cavity 1 is an equal-diameter arc body, namely the diameters of any side surfaces of arc rings formed in the cavity 1 are equal, the inner diameter of the cavity 1 is 30mm, the wall thickness of the joint body 2 is 41mm, and the bending angle of the joint body 2 is 135 degrees.

The cavity in the elbow joint is an equal-diameter arc-shaped body, and in the process of fluid transmission, particularly the transmission pressure of pressure fluid cannot be changed due to the change of the volume when the fluid flows through the cavity, so that the pressure transmission is stable, and the loss is reduced; smooth arc transition, no fluid transmission dead angle inside, no vortex, and reduced noise during fluid flow.

Example 2

Referring to fig. 3, the elbow joint for fluid connection comprises a joint body 2 having a cavity 1, the cavity 1 having an inner diameter of 10mm and the joint body 2 having a wall thickness of 20 mm; the two ends of the joint body 2 are respectively provided with an external thread 5 connected with adjacent pipe bodies, the external threads 5 arranged at the two ends of the joint body 2 are identical in structure, each external thread 5 comprises a first thread 51 and a second thread 52, the distance between the first thread 51 and the second thread 52 is the width of the second thread 52, and the first thread 51 and the second thread 52 are arranged at the same end of the joint body 2; the joint body 2 is of a bending structure, and the bending angle of the joint body 2 is 90 degrees; the inner surface of the cavity 1 is a smooth arc, the cavity 1 is an isometric arc body, the inner sides of the joint bodies 2 are respectively coated with a corrosion-resistant layer 4, and the corrosion-resistant layers 4 are epoxy paint; the outer side wall of the joint body 2 is further coated with a fixing plate 3, and the fixing plate 3 is attached to the outer side wall of the joint body 2.

Example 3

Referring to fig. 4 to 5, the elbow joint for fluid connection includes a joint body 2 having a cavity 1, wherein an inner diameter of the cavity 1 is 5mm, a wall thickness of the joint body 2 is 15mm, external threads 5 connected to adjacent pipe bodies are respectively provided at both ends of the joint body 2, the joint body 2 is of a bent structure, and a bending angle of the joint body 2 is 60 °; the inner surface of the cavity 1 is smooth arc, the cavity 1 is an isometric arc body, two ends of the joint body 2 are regular hexagonal bodies, namely, the external threads 5 are arranged on the periphery of the regular hexagonal bodies, the external threads 5 are regular hexagonal external threads, and the external threads 5 are continuous thread rings; the inner sides of the joint bodies 2 are respectively coated with an anti-corrosion layer 4, and the anti-corrosion layers 4 are polytetrafluoroethylene coatings; the outer side wall of the joint body 2 is further coated with a fixing plate 3, and the fixing plate 3 is attached to the outer side wall of the joint body 2; the outer side of the joint body 2 is provided with a bent pipe heat-insulating sleeve 6, and the bent pipe heat-insulating sleeve 6 is used for hermetically coating the joint body 2 with the external threads 5 and the fixing plate 3.

In the embodiment, the bent pipe heat insulation sleeve is added, so that energy loss during high-temperature or low-temperature fluid transmission can be avoided, the output pressure of the fluid is reduced, and the pressure fluid is stably transmitted; set up to regular hexagon body with joint body both ends, threaded connection power when elbow fitting is connected with adjacent body can be improved, connect the fastening, circumstances such as elbow fitting department can not take place to leak.

The elbow joints according to embodiments 1 to 3 are formed by using a joint body made of a material such as stainless steel, carbon steel, or copper, and are easy to process, and the equal diameter arrangement of the cavity 1 can be realized. The elbow joint is connected and fastened in the application process, pressure transmission is stable, use is convenient and fast, and noise is low.

As inspired by the above-described preferred embodiments according to the present invention, the corrosion-resistant coating 4 may also be an electroplated coating, in particular a galvanized coating, which also has good corrosion-resistant properties. With the above description, workers can make various changes and modifications without departing from the spirit of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The elbow joint for fluid connection comprises a joint body (2) with a cavity (1), wherein external threads (5) connected with adjacent pipe bodies are respectively arranged at two ends of the joint body (2), and the joint body (2) is of a bent structure; the method is characterized in that: the inner surface of the cavity (1) is smooth arc, and the cavity (1) is an isometric arc body.

2. The elbow fitting for fluid connection according to claim 1, wherein: the external screw thread (5) that set up at joint body (2) both ends structure is the same, external screw thread (5) include first screw thread (51) and second screw thread (52), and first screw thread (51) and second screw thread (52) interval are the width of second screw thread (52), and first screw thread (51) and second screw thread (52) set up at the same end of joint body (2).

3. The elbow fitting for fluid connection according to claim 1, wherein: the inner sides of the joint bodies (2) are respectively coated with a corrosion-resistant layer (4).

4. The elbow fitting for fluid connection according to claim 3, wherein: the corrosion-resistant layer (4) is an epoxy paint, a polytetrafluoroethylene coating or an electroplating coating.

5. The elbow fitting for fluid connection according to claim 1, wherein: the outer side wall of the joint body (2) is further coated with a fixing plate (3), and the fixing plate (3) is attached to the outer side wall of the joint body (2).

6. The elbow fitting for fluid connection according to claim 5, wherein: the outer side of the joint body (2) is provided with a bent pipe heat-insulating sleeve (6), and the bent pipe heat-insulating sleeve (6) is used for sealing and coating the position of the joint body (2) except the external thread (5) and the fixing plate (3).

7. The elbow fitting for fluid connection according to claim 1, wherein: connect body (2) both ends to be the regular hexagon body, external screw thread (5) set up in the regular hexagon periphery promptly, external screw thread (5) are the regular hexagon external screw thread, external screw thread (5) are continuous thread circle.

8. The elbow fitting for fluid connection according to claim 1, wherein: the inner diameter of the cavity (1) is 3-30 mm, the wall thickness of the joint body (2) is 14-41 mm, and the bending angle of the joint body (2) is 30-150 degrees.