Lining elbow provided with dovetail groove and suitable for full vacuum

Abstract

The utility model discloses a lining elbow with a dovetail groove suitable for full vacuum, and relates to the technical field of lining elbows, the lining elbow comprises a metal elbow and a plastic lining, the plastic lining is sleeved in the metal elbow, the dovetail groove is arranged on the inner wall body of the outer bending side of the metal elbow, and the dovetail groove is arranged on the inner wall body of the outer bending side of the metal elbow. A connecting bulge is arranged on the outer bent side surface of the plastic lining, and is arranged in the dovetail groove in a matching manner; according to the technical scheme, the dovetail groove structure is arranged in the metal elbow, the dovetail groove is of a limiting structure with a small opening and a large bottom, the connecting protrusions corresponding to the bird's nest grooves are arranged on the surface of the plastic lining, and the negative pressure resistance of the lining elbow is improved by clamping the connecting protrusions into the dovetail groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lining elbow, specifically relates to a lining elbow with dovetail groove suitable for full vacuum. BACKGROUND

[0002] The elbow iron piece of the lining elbow generally adopts steel pipe push pressure or adopts precision casting to make, is generally regular arc pipeline shape, therefore the inside of the existing elbow iron piece has no strengthening support, leading to the lining elbow after lining to be prone to product hollow cracking under the working condition of high temperature full vacuum, and according to product hollow cracking case and test, it is found that hollow points mainly concentrate in the direction of lining large camber, and a customer in the use process needs to stop the whole production line because of a elbow, which influences production. UTILITY MODEL CONTENT

[0003] The utility model relates to a lining elbow with dovetail groove suitable for full vacuum, which solves the problem of easy hollow cracking of the lining elbow.

[0004] TECHNICAL SCHEME

[0005] To solve the above problems, the technical scheme provided by the utility model is as follows:

[0006] A lining elbow with dovetail groove suitable for full vacuum, comprising a metal elbow and a plastic lining, the plastic lining is sleeved in the metal elbow, a dovetail groove is arranged on the inner wall of the outer bending side of the metal elbow, a connecting protrusion is arranged on the outer bending side surface of the plastic lining, and the connecting protrusion is arranged in the dovetail groove (formed in the dovetail groove when in a molten state).

[0007] Further, the dovetail groove is in isosceles trapezoidal structure, one side of the dovetail groove facing the inner pipeline of the metal elbow is a short side, and the other side of the dovetail groove facing the outer side of the metal elbow is a long side.

[0008] Further, the connecting protrusion is arranged corresponding to the dovetail groove.

[0009] Further, the dovetail groove extends from one end of the metal elbow to the other end.

[0010] Further, the connecting protrusion extends from the one end to the other end.

[0011] Further, the dovetail groove is at least one, and the number and position of the connecting protrusions correspond to the dovetail groove.

[0012] Further, when the dovetail groove is one, the dovetail groove is arranged centrally on one side of the outer side bending.

[0013] Further, when the dovetail grooves are more than one, the dovetail grooves are centrally distributed on one side of the outer side bend.

[0014] Further, the metal bend is further provided with connecting flanges at two ends.

[0015] Advantages

[0016] Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

[0017] The utility model discloses a technical scheme that sets up the dovetail groove structure in the metal bend, and the dovetail groove is the limit structure of small mouth and big bottom, and the connecting convex is set up on the plastic lining surface and corresponds to the dove nest groove, and the connecting convex is clamped into the dovetail groove, and the negative pressure resistance of the lining bend is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of the metal bend of one implementation mode of the utility model embodiment 1.

[0019] Figure 2 It is the side sectional view of the metal bend of one implementation mode of the utility model embodiment 1.

[0020] Figure 3 It is the structure schematic diagram of the metal bend of another implementation mode of the utility model embodiment 1.

[0021] Figure 4 It is the side sectional view of the metal bend of another implementation mode of the utility model embodiment 1.

[0022] Figure 5 It is the structure schematic diagram of the plastic lining of one implementation mode of the utility model embodiment 1.

[0023] Figure 6 It is the structure schematic diagram of the plastic lining of another implementation mode of the utility model embodiment 1.

[0024] Figure 7 It is the combination schematic diagram of the metal bend and plastic lining of the utility model embodiment 1. DETAILED DESCRIPTION

[0025] In order to make the utility model technical scheme clearer, the utility model is further explained in detail in the following with the combination of the drawings and specific embodiments.

[0026] Embodiment 1

[0027] The drawings are combined Figures 1-7The application relates to a full-vacuum gull-wing elbow liner, which is composed of a metal elbow 10 and a plastic liner 20, the plastic liner 20 is sleeved in the metal elbow 10 to form a whole, the metal elbow 10 is an arc-shaped pipeline, and the plastic liner 20 corresponds to the shape of the metal elbow 10.

[0028] The metal elbow 10 is divided into an inner bending side and an outer bending side, the side close to the bending center of the metal elbow 10 is the inner bending side, and the side far from the bending center of the metal elbow 10 is the outer bending side.

[0029] A gull-wing groove 11 is arranged on the inner space wall of the outer bending side in the pipeline space in the metal elbow 10, the gull-wing groove 11 is formed by a plastic-dipping elbow and penetrates the metal elbow 10 to the other end, and the gull-wing groove 11 corresponds to the shape of the metal elbow 10.

[0030] The section of the gull-wing groove 11 is an isosceles trapezoidal structure, the side of the gull-wing groove 11 facing the pipeline in the metal elbow 10 is a short side, and the side of the gull-wing groove 11 facing the outside of the metal elbow 10 is a long side, so that the gull-wing groove 11 has a limiting effect through the isosceles trapezoidal structure.

[0031] The plastic liner 20 corresponds to the structure of the metal elbow 10, the plastic liner 20 is also divided into an inner bending side and an outer bending side, the plastic liner 20 also has a pipeline space in the inner part, and a protruding connecting protrusion 21 is arranged on the outer surface of the outer bending side of the plastic liner 20.

[0032] The connecting protrusion 21 of the plastic liner 20 corresponds to the gull-wing groove 11 in the metal elbow 10, and the section of the connecting protrusion 21 is also an isosceles trapezoidal structure.

[0033] The isosceles trapezoidal structure of the gull-wing groove 11 and the isosceles trapezoidal structure of the connecting protrusion 21 are deformed according to the circular pipeline mechanism of the metal elbow 10 and the plastic liner 20.

[0034] The connecting protrusion 21 of the plastic liner 20 is arranged in the gull-wing groove 11 of the metal elbow 10, so as to be combined into a liner elbow.

[0035] In actual production, the plastic liner 20 is directly fused in the metal elbow 10, so that the connecting protrusion 21 of the plastic liner 20 is directly formed by plastic fusion, and is fused into the gull-wing groove 21 in the forming process.

[0036] After the connecting protrusion 21 of the plastic liner 20 is clamped into the gull-wing groove 11, the connecting protrusion 21 of the plastic liner 20 can tightly adhere to the metal elbow 10.

[0037] Since the existing lining elbow is generally used in high-temperature full-vacuum working condition, the lining elbow will appear hollow cracking, and statistics show that the hollow cracking points are mainly concentrated in the outer bending side of the lining elbow, therefore, the lining elbow of the above scheme increases the dovetail groove 11 in the metal elbow 10 on the outer bending side, and after the plastic lining 20 is installed, the isosceles trapezoidal structure of the dovetail groove 11 and the connecting protrusion 21 of the plastic lining 20 form an integral whole, the connecting protrusion 21 can greatly increase the gripping force of the lining elbow on the outer bending side by clamping in the dovetail groove 11, and the negative pressure resistance of the lining elbow is ensured.

[0038] In specific implementation, the dovetail groove 11 can be designed in different numbers according to the size of the pipeline in the lining elbow and the use environment, when the dovetail groove 11 is one, the dovetail groove 11 is arranged in the center of the outer bending side of the metal elbow 10, and when the dovetail groove 11 is arranged in multiple, the multiple dovetail grooves 11 are arranged in the center of the outer bending side of the metal elbow 10, which can all achieve good negative pressure resistance.

[0039] The number of the dovetail groove 11 is determined according to the stress area in the vacuum state during use of the elbow structure, the greater the stress area, the more the number of the dovetail groove 11 and the matching structure of the connecting protrusion 21.

[0040] In actual use, the metal elbow 10 is also provided with a connecting flange at both ends, which is used for facilitating the installation of the lining elbow.

[0041] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A lined elbow with dovetail grooves suitable for full vacuum, characterized in that, The metal elbow and the plastic lining are included, the plastic lining is sleeved in the metal elbow, dovetail grooves are arranged on the inner wall of the outer bending side of the metal elbow, and connecting protrusions are arranged on the outer bending side surface of the plastic lining and matched in the dovetail grooves.

2. A lined elbow with dovetail grooves suitable for full vacuum according to claim 1, characterized in that, The dovetail groove is in isosceles trapezoidal structure, one side of the dovetail groove facing the internal pipeline of the metal elbow is a short side, and the other side of the dovetail groove facing the outer side of the metal elbow is a long side.

3. A lined elbow with dovetail for full vacuum according to claim 2, characterized in that The connecting protrusions are arranged in the dovetail grooves correspondingly.

4. A lined elbow with dovetail for full vacuum according to claim 1, characterized in that The dovetail grooves extend from one end of the metal elbow to the other end.

5. A lined elbow with dovetail for full vacuum according to claim 1, characterized in that, The connecting protrusions extend from the one end to the other end.

6. A lined elbow with dovetail for full vacuum according to claim 1, characterized in that The dovetail grooves are at least one, and the number and position of the connecting protrusions correspond to the dovetail grooves.

7. A lined elbow with dovetail grooves suitable for full vacuum according to claim 6, characterized in that, When the dovetail grooves are one, the dovetail grooves are arranged centrally on one side of the outer bending side.

8. A lined elbow with dovetail grooves suitable for full vacuum according to claim 6, characterized in that, When the dovetail grooves are more than one, the dovetail grooves are centrally distributed on one side of the outer bending side.

9. A lined elbow with dovetail for full vacuum according to claim 1, characterized in that The metal elbow is further provided with connecting flanges at two ends.

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