CN211052241U

CN211052241U - Filling device for bent pipe

Info

Publication number: CN211052241U
Application number: CN201921648297.7U
Authority: CN
Inventors: 张勇
Original assignee: Zhangjiagang Qiling Machinery Manufacturing Co ltd
Current assignee: Zhangjiagang Qiling Machinery Manufacturing Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-21
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a filling device for bent pipes, which comprises a rubber rod, wherein a first cavity is arranged in the rubber rod, an air bag layer is arranged outside the first cavity, one end of the rubber rod is provided with an inflation hole, a first counter bore is arranged on one side of the inflation hole and on the inner side of the rubber rod, the first counter bore is provided with a fixed block, a spring is arranged at the middle position of the fixed block, a plug body is arranged in the spring, and an exhaust screw is arranged at the middle position of the plug body; the fixing block comprises a circular ring arranged in the first counter bore, a first cylinder is arranged at the middle position of the circular ring, a second counter bore is formed in the first cylinder, and a plurality of rib plates are uniformly arranged on the outer side of the circumference of the first cylinder. Has the advantages that: the pipe blank bending machine has the advantages that the structural design is reasonable, the quality of the pipe blank during bending can be effectively guaranteed, the problems of flattening, ovalization, local collapse and inner-side folding are avoided, and the roundness of the bending part is fully guaranteed.

Description

Filling device for bent pipe

Technical Field

The utility model relates to a bending machine equipment technical field particularly, relates to a filling device for return bend.

Background

The bending pipe is bent by adopting a complete set of bending equipment and is divided into two processes of cold bending and hot pushing. No matter which kind of machine equipment and pipeline, the elbow pipe is mostly used for oil transportation, gas transportation, liquid transportation, engineering bridge construction and the like. The bent pipe fitting is a hollow section product which is widely applied, and is generally manufactured by bending and plastically deforming a straight pipe blank by using a certain plastic forming method. Hitherto, various pipe bending methods such as bending around, bending under pressure, bending by rolling, bending by stretching, etc. have been developed for different needs and are widely used in production practice. However, because the pipe has a special thin-wall hollow structural form, the existing pipe bending method has corresponding limitations in practical application, and particularly, the bending quality is difficult to meet the requirement of precision. For example, different types and degrees of forming defects, including cross-sectional distortion (flattening or ovalization), local collapse, inside wrinkles, and outside cracks, often occur in the deformed area when a tube blank is bent, and are particularly serious when the tube blank is bent at a small radius of curvature with a large degree of deformation. For the bending of the thin-walled tube with the rectangular uniform cross section, other defects such as distortion exist. These forming defects not only affect the aesthetic appearance of the product and reduce the precision of the product, but also cause the bearing capacity of the pipe structure to be reduced and seriously affect the service performance of the pipe structure.

SUMMERY OF THE UTILITY MODEL

To the problem among the correlation technique, the utility model provides a filling device for return bend to overcome the above-mentioned technical problem that current correlation technique exists.

Therefore, the utility model discloses a specific technical scheme as follows:

a filling device for a bent pipe comprises a rubber rod, wherein a first cavity is arranged in the rubber rod, an air bag layer is arranged on the outer side of the first cavity, an inflation hole is formed in one end of the rubber rod, a first counter bore is formed in one side of the inflation hole and located on the inner side of the rubber rod, a fixing block is arranged in the first counter bore, a spring is arranged in the middle of the fixing block, a plug body is sleeved in the spring, and an exhaust screw is arranged in the middle of the plug body; the fixing block comprises a circular ring arranged in the first counter bore, a first cylinder is arranged at the middle position of the circular ring, a second counter bore is formed in the first cylinder, a plurality of rib plates are uniformly arranged on the outer side of the circumference of the first cylinder, one end, far away from the first cylinder, of each rib plate is connected with the inner wall of the circular ring, a second cavity is formed between every two rib plates, and compressed air filled into the first cavity is provided by an air compressor.

Furthermore, in order to enable the chamfer to be tightly attached to the side face of the circular truncated cone, the air in the cavity I can not overflow, the sealing effect is achieved, and chamfers are arranged at two ends of the inflation hole.

Further, for making the cock body cooperatees with the spring, makes the cock body hugs closely all the time aerify the hole and guarantee that the gas in the cavity one can not spill over, simultaneously in the pipe accomplish crooked back, can pass through exhaust screw will the gas outgoing in the cavity one makes the rubber stick reduces, and then conveniently takes out, and this machining efficiency who just guarantees the return bend, the cock body is including setting up cylinder two in the counter bore two, the one end of cylinder two is provided with the round platform, the screw thread through-hole has been seted up to the centre of round platform.

Furthermore, in order to enable the threaded through hole to be matched with the exhaust screw more tightly and improve the sealing performance, the threads of the threaded through hole are fine threads.

Further, in order to make the structure of the air bag layer more stable and further ensure uniform expansion under the action of compressed air, the structure of the air bag layer is a honeycomb structure.

Furthermore, in order to play a supporting role in the bending process of the tube blank, so that the forming defects of cross section distortion and the like of the tube fitting are reduced, and the requirement of precise tube bending forming is met, the rubber rod is made of an elastic material.

The utility model has the advantages that:

(1) the utility model has the advantages of reasonable design, can guarantee the quality of pipe when crooked effectively, avoid appearing flattening, ovalization, local collapse, inboard goffer's problem, fully guaranteed the circularity of bend.

(2) Through setting up aerify the hole with the round platform reaches cavity two phase cooperation to through aerify the hole and dash into compressed air, compressed air passes through cavity two gets into in the cavity one, when compressed air is full of during the cavity is one, the chamfer with the side of round platform is closely laminated, guarantees the air in the cavity one can not spill over, has played sealed effect.

(3) Through setting up the cock body with the exhaust screw cooperatees to after the pipe is accomplished to bend, can pass through the exhaust screw will the gaseous emission in the cavity one makes the rubber stick dwindles, and then conveniently takes out, and this machining efficiency who has just guaranteed the return bend.

(4) Through setting up the rubber stick, thereby pass through when aerifing the hole and pouring into compressed air, the rubber stick inflation and then fill up the pipe inner chamber, and then play the effect of support at pipe bending in-process to reduce the forming defects such as the cross-section distortion of pipe fitting, satisfy the needs that precision return bend takes shape.

Drawings

Fig. 1 is a schematic structural view of a filling device for elbows according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural view of a fixing block of a filling device for elbows according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a plug body of a filling device for elbows according to an embodiment of the present invention.

In the figure:

1. a rubber rod; 2. a first cavity; 3. an air bag layer; 4. an inflation hole; 401. chamfering; 5. a first counter bore; 6. a fixed block; 601. a circular ring; 602. a first cylinder; 603. a second counter bore; 604. a rib plate; 605. a second cavity; 7. a spring; 8. a plug body; 801. a second cylinder; 802. a circular truncated cone; 803. a threaded through hole; 9. an exhaust screw.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and specific embodiments, as shown in fig. 1-4, according to the filling device for bending pipe of the embodiment of the present invention, the filling device includes a rubber rod 1, a first cavity 2 is provided in the rubber rod 1, an air bag layer 3 is provided outside the first cavity 2, an inflation hole 4 is provided at one end of the rubber rod 1, a first counter bore 5 is provided at one side of the inflation hole 4 and at the inner side of the rubber rod 1, the first counter bore 5 is provided with a fixing block 6, a spring 7 is provided at the middle position of the fixing block 6, a plug body 8 is sleeved in the spring 7, and an exhaust screw 9 is provided in the middle of the plug body 8; the fixed block 6 comprises a circular ring 601 arranged in the counterbore I5, a cylinder I602 is arranged in the middle of the circular ring 601, a counterbore II 603 is arranged on the cylinder I602, a plurality of rib plates 604 are uniformly arranged on the outer side of the circumference of the cylinder I602, one end, far away from the cylinder I602, of each rib plate 604 is connected with the inner wall of the circular ring 601, and a cavity II 605 is formed between every two rib plates 604.

By means of the scheme, the structure design is reasonable, the quality of the tube blank during bending can be effectively guaranteed, the problems of flattening, ovalization and inner-side folding are avoided, and the roundness of the bending part is fully guaranteed.

In one embodiment, chamfers 401 are arranged at two ends of the inflation hole 4, so that the chamfers 401 are tightly attached to the side surfaces of the circular truncated cone 802, the air in the cavity I2 is prevented from overflowing, and a sealing effect is achieved.

In one embodiment, the plug body 8 comprises a second cylinder 801 arranged in the second counter bore 603, a circular truncated cone 802 is arranged at one end of the second cylinder 801, a threaded through hole 803 is formed in the middle of the circular truncated cone 802, so that the plug body 8 is matched with the spring 7, the plug body 8 is always tightly attached to the inflation hole 4, gas in the first cavity 2 is guaranteed not to overflow, and meanwhile, after the pipe blank is bent, the gas in the first cavity 2 is exhausted through the exhaust screw 9, so that the rubber rod 1 is reduced and then is conveniently taken out, and the machining efficiency of the bent pipe is guaranteed.

In one embodiment, the thread of the threaded through hole 803 is a fine thread, so that the threaded through hole 803 is matched with the exhaust screw 9 more tightly, and the sealing performance is improved.

In one embodiment, the structure of the air bag layer 3 is a honeycomb structure, so that the structure of the air bag layer 3 is more stable, and uniform expansion under the action of compressed air is ensured.

In one embodiment, the rubber rod 1 is made of an elastic material, so that when compressed air is injected through the inflation hole 4, the rubber rod 1 expands to fill the inner cavity of the tube blank, and then plays a supporting role in the bending process of the tube blank, so that the cross-section distortion of the tube fitting is reduced, and the requirement of precise tube bending forming is met.

The working principle is as follows: when the pipe blank bending device is used, the rubber rod 1 is firstly installed into the pipe blank, compressed air is filled into the cavity I2 through the inflation holes 4, the compressed air is filled into the cavity I2, the rubber rod 1 is further made to expand to fill the pipe blank, at the moment, the chamfer 401 is tightly attached to the side face of the circular truncated cone 802, the air in the cavity I2 is guaranteed not to overflow, and after the pipe blank is bent, the gas in the cavity I2 can be discharged through the exhaust screw 9, so that the rubber rod 1 is reduced, and the rubber rod 1 is taken out to be bent next time.

In conclusion, with the aid of the technical scheme of the utility model, through setting up aerify hole 4 with the round platform 802 reaches two cavities 605 cooperate, thereby pass through when aerifing hole 4 and rushing into compressed air, compressed air passes through two cavities 605 get into in the cavity 2, chamfer 401 with the side of round platform 802 closely laminates, guarantees the air in the cavity 2 can not spill over, has played sealed effect. Through setting up cock body 8 with exhaust screw 9 cooperatees to after the pipe is accomplished to bend, can pass through exhaust screw 9 will the gas escape in the cavity 2 makes rubber stick 1 reduces, and then conveniently takes out, and this machining efficiency who has just guaranteed the return bend. Through setting up rubber stick 1 is thus passing through when aerifing hole 4 injection compressed air, 1 inflation of rubber stick and then fill up the pipe inner chamber, and then play the effect of support at pipe bending process to reduce the forming defects such as cross-sectional distortion of pipe fitting, satisfy the fashioned needs of precision return bend. Therefore, the structural design is reasonable, the quality of the tube blank during bending can be effectively guaranteed, the problems of flattening, ovalization, local collapse and inner-side corrugation are avoided, and the roundness of the bending part is fully guaranteed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The filling device for the elbow is characterized by comprising a rubber rod (1), wherein a first cavity (2) is arranged in the rubber rod (1), an air bag layer (3) is arranged on the outer side of the first cavity (2), an inflation hole (4) is formed in one end of the rubber rod (1), a first counter bore (5) is formed in one side of the inflation hole (4) and located in the inner side of the rubber rod (1), a fixing block (6) is arranged in the first counter bore (5), a spring (7) is arranged in the middle of the fixing block (6), a plug body (8) is sleeved in the spring (7), and an exhaust screw (9) is arranged in the middle of the plug body (8);

the fixing block (6) comprises a circular ring (601) arranged in the first counter bore (5), a first cylinder (602) is arranged at the middle position of the circular ring (601), a second counter bore (603) is formed in the first cylinder (602), a plurality of rib plates (604) are uniformly arranged on the outer side of the circumference of the first cylinder (602), one ends, far away from the first cylinder (602), of the rib plates (604) are connected with the inner wall of the circular ring (601), and a second cavity (605) is formed between every two rib plates (604).

2. The elbow pipe filling device according to claim 1, wherein both ends of the air charging hole (4) are provided with chamfers (401).

3. The filling device for the elbow according to claim 1, wherein the plug body (8) comprises a second cylindrical body (801) arranged in the second counter bore (603), one end of the second cylindrical body (801) is provided with a circular truncated cone (802), and a threaded through hole (803) is formed in the middle of the circular truncated cone (802).

4. The apparatus for filling an elbow according to claim 3, wherein the thread of the threaded through hole (803) is a fine thread.

5. The filling device for elbows according to claim 1, wherein the structure of the air bag layer (3) is a honeycomb structure.

6. The elbow filling device according to claim 1, wherein the rubber rod (1) is an elastic material.