CN203484548U - Sealing device for pipe fitting - Google Patents

Abstract

The utility model provides a closing device for pipe fitting, include: the first stamping part comprises a first body and a groove arranged on the first body; and the second stamping part comprises a second body and a protrusion arranged on the second body, the protrusion is arranged corresponding to the groove, and the protrusion has a shape matched with the groove. The utility model discloses a closing device adopts protruding and recess complex form extrusion pipe fitting for the stress surface on the pipe fitting increases, has realized stress dispersion, has effectively avoided the pipe fitting because the intensity that stress concentration caused reduces or the crack, and then has improved the leakproofness that the pipe fitting sealed, and has improved the quality of sealing of pipe fitting.

Description

Closing device for pipe fitting

Technical field

The utility model relates to mechanical field, more specifically, relates to a kind of closing device for pipe fitting.

Background technology

Process duct in air-conditioner hose system is the critical piece that air-conditioner vacuumized, poured into refrigerant, in pipeline assembling process, will seal process duct, and the sealing of the sealing of process duct and intensity directly affect reliability and the quality of air-conditioner hose system.

In prior art, the main mode of gas brazing that adopts is carried out process duct sealing, and uses cutting edge instrument secondary seal.The mode of operation of cutting edge instrument is for to be placed in process duct to be sealed between two folder swords, and two press from both sides the inside extrusion process pipe of sword, and technique pipe clamp is flat, realize sealing.Although this cutting edge type refrigeration system pipeline enclosuring structure can effectively prevent from refrigrant leakage from completing sealing operation, very concentrated by the flat place of the folder stress of the flat process duct of cutting edge tool holder, if repeatedly bent by external force, very easily there is crackle, even rupture.In addition, to the exemplar of sealed process duct carry out mechanical analysis and micro metallographic analysis known, cutting edge instrument can form at the two ends at the flat place of tubing clamp stress coincidence district (the flat stress of sealing clip and refrigeration system internal pressure overlap), and cause fine crack, and constantly expand until there is splitting leakage in refrigeration system running.

Utility model content

The utility model aims to provide a kind of closing device for pipe fitting, easily at seal location generation stress, concentrates when solving prior art pipe fitting is sealed, and the structure of destroying pipe fitting even makes pipe fitting that the problem of leaking occurs.

For solving the problems of the technologies described above, the utility model provides a kind of closing device for pipe fitting, comprising: the first stamping parts, comprises the first noumenon and be arranged on the groove on the first noumenon; The second stamping parts, comprises the second body and is arranged on the projection on the second body, projection arranges accordingly with groove, and projection has the shape matching with groove.

Further, the opening of groove on the upper surface of the first noumenon is rounded.

Further, groove comprises first paragraph and second segment, and second segment is arranged on the bottom of first paragraph, and the opening diameter of the intersection of second segment and first paragraph is less than or equal to 1/3rd of the opening diameter of first paragraph on the upper surface of the first noumenon.

Further, 83.3% to 116.7% of the diameter that opening diameter second segment and intersection first paragraph is pipe fitting.

Further, the first stamping parts also comprises two projections, and two projections protrude from the first noumenon towards the direction of the first stamping parts, and groove is arranged between two projections.

Further, the end away from the first noumenon of projection is arcs of recesses.

Further, 33.3% to 66.7% of the diameter that the distance between two projections is pipe fitting.

Further, 50% to 83.3% of the diameter that the depth capacity of groove is pipe fitting.

Further, closing device also comprises the first motion arm and the second motion arm being hinged, and the first noumenon is arranged on the first motion arm, and the second body is arranged on the second motion arm.

Further, closing device also comprises piston cylinder, and the first motion arm is connected with the cylinder body of piston cylinder, and the second motion arm is connected with the piston rod of piston cylinder.

Closing device of the present utility model adopts projection and the form of groove fit to push pipe fitting, stress surface on pipe fitting is increased, realized stress dispersion, effectively avoided pipe fitting because stress is concentrated strength decreased or the slight crack causing, and then improved the sealing of pipe fitting sealing, and improved the seal quality of pipe fitting.

Accompanying drawing explanation

The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 has schematically shown the cutaway view of a kind of closing device in the utility model;

Fig. 2 has schematically shown the side view of the closing device in the Fig. 1 in the utility model;

Fig. 3 has schematically shown the cutaway view of the another kind of closing device in the utility model;

Fig. 4 has schematically shown the side view of the closing device in the Fig. 3 in the utility model;

Fig. 5 has schematically shown Fig. 3 in the utility model and the schematic perspective view of the closing device in Fig. 4;

Fig. 6 has schematically shown the schematic diagram that the closing device in the utility model carries out the step 1 of sealing operation;

Fig. 7 has schematically shown the schematic diagram that the closing device in the utility model carries out the step 2 of sealing operation; And

Fig. 8 has schematically shown the schematic diagram that the closing device in the utility model carries out the step 3 of sealing operation.

Reference numeral in figure: 10, the first stamping parts; 11, the first noumenon; 12, groove; 20, the second stamping parts; 21, the second body; 22, projection; 13, projection; 30, the first motion arm; 40, the second motion arm; 50, pipe fitting; 60, snap joint; 70, sealing compound; 121, first paragraph; 122, second segment.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.

The utility model provides a kind of closing device for pipe fitting, and as shown in Fig. 1 to 8, this closing device comprises: the first stamping parts 10, comprises the first noumenon 11 and be arranged on the groove 12 on the first noumenon 11; The second stamping parts 20, comprises the second body 21 and is arranged on the projection 22 on the second body 21, projection 22 arranges accordingly with groove 12, and projection 22 has the shape matching with groove 12.

The form extruding pipe fitting 50 that closing device of the present utility model adopts projection 22 to coordinate with groove 12, stress surface on pipe fitting 50 is increased, realized stress dispersion, effectively avoided pipe fitting 50 because stress is concentrated strength decreased or the slight crack causing, and then improved the sealing of pipe fitting 50 sealings, and improved the seal quality of pipe fitting 50.

Preferably, as illustrated in fig. 1 and 2, the opening of groove 12 on the upper surface of the first noumenon 11 is rounded.Axially curved in groove 12 and projection 22 at pipe fitting 50, can effectively increase the lifting surface area that extruding pipe fitting 50 makes, and avoids stress to concentrate.

Preferably, groove 12 comprises first paragraph 121 and second segment 122, second segment 122 is arranged on the bottom of first paragraph 121, and second segment 122 is less than or equal to 1/3rd of the opening diameter of first paragraph 121 on the upper surface of the first noumenon 11 with the opening diameter of the intersection of first paragraph 121.Second segment 122 can form bump structure on pipe fitting 50, can increase like this structural strength of sealing part, guarantees the sealing of pipe fitting 50 sealings.

Preferably, 83.3% to 116.7% of the diameter that opening diameter second segment 122 and intersection first paragraph 121 is pipe fitting 50.Preferably, the depth capacity of groove 12 be pipe fitting 50 diameter 50% to 83.3%.Preferably, the total length of the sealing moulding on pipe fitting 50 is 133% to 200% of process duct diameter.

The pipe fitting 50 of Φ 6 of take is example, the about 8mm to 12mm of total length of sealing moulding, and the diameter of the middle salient point of sealing part is about 5mm to 7mm, and the degree of depth that during sealing operation, projection 22 enters groove 12 is about 3mm to 5mm.

Preferably, as Fig. 3 to 5, the first stamping parts 10 also comprises that 13, two projections 13 of two projections protrude from the first noumenon 11 towards the direction of the first stamping parts 10, and groove 12 is arranged between two projections 13.When sealing operation, projection 13 meetings shape forming tank on pipe fitting 50, type groove can increase the intensity of the sealing part of pipe fitting 50, increases the sealing of sealing part.

Preferably, the end away from the first noumenon 11 of projection 13 is arcs of recesses.Preferably, the arcs of recesses of the end of two projections 13 is coaxial.Arcs of recesses can increase the stress surface of pipe fitting 50, avoids stress to concentrate.

Preferably, the distance of 13 of two projections be pipe fitting 50 diameter 33.3% to 66.7%.Preferably, the depth capacity of groove 12 be pipe fitting 50 diameter 50% to 83.3%.Preferably, preferably, the total length of the sealing moulding on pipe fitting 50 is 133% to 200% of process duct diameter.

The pipe fitting 50 of Φ 6 of take is example, the about 8mm to 12mm of total length of sealing moulding, and the distance between the type groove being formed by projection 13 of sealing part is about 2mm to 4mm, and the degree of depth that during sealing operation, projection 22 enters groove 12 is about 3mm to 5mm.

Preferably, as shown in Fig. 6 to 8, closing device also comprises the first motion arm 30 and the second motion arm 40 being hinged, and the first noumenon 11 is arranged on the first motion arm 30, and the second body 21 is arranged on the second motion arm 40.Closing device can be made into Sealing pliers, because closing device adopts the sealing of punching press form, so do not need accurately to grasp dynamics, as long as guarantee that press depth enough just can guarantee the sealing of sealing, and is difficult for cutting off pipe fitting 50, easy to operate.

Preferably, closing device also comprises piston cylinder, and the first motion arm 30 is connected with the cylinder body of piston cylinder, and the second motion arm 40 is connected with the piston rod of piston cylinder.The first noumenon 11 of closing device and the second body 21 also can coordinate with piston element, as hydraulic tongs or air pressure pincers, to complete sealing operation by external force.This kind of closing device be not shown in the application's accompanying drawing.

The step of sealing operation is mainly divided three steps, and Fig. 6 to 8 shows respectively this three steps: first with closing device, pipe fitting 50 is once sealed, unclamp closing device after sealing, take off after snap joint 60, require pipe fitting without obvious refrigerant leakage; Then from the openend of pipe fitting, pour into the sealing compound 70 of 0.1ml to 0.3ml, preferably sealing compound 70 is anaerobic structure glue, and glue should go deep into 6mm to 8mm in the mouth of pipe, while guaranteeing secondary sealing, in pipe fitting 50, has enough glues to adhere to; Finally after encapsulating, in 1 minute, with closing device, the port position of pipe fitting 50 is carried out to secondary sealing, after sealing, estimate sealing part without clear gap, electronic leak detector leak detection alarm free.

How the closing device of the present utility model of below deriving theoretically can be realized is avoided stress to concentrate, and realizes the effect of stress dispersion.

If exist a power to make pipe fitting 50 fractures, must there is a limit stress, i.e. the second strength theory: no matter material is in what stress state, as long as there is brittle fracture, is all the elongation at rupture strain numerical value while reaching simple extension due to the maximum stretching strain in infinitesimal (line distortion).

According to two, to state stress analysis, in analytic method, according to two in Liu Hongwen version mechanics of materials chapter 7 stress-strain analysis, to state stress analysis formula, obtain, the maximum stress on this infinitesimal oblique section is:

${\mathrm{\σ}}_{\max }=\frac{{\mathrm{\σ}}_x+{\mathrm{\σ}}_y}{2}+\frac{1}{2}\sqrt{{({\mathrm{\σ}}_x-{\mathrm{\σ}}_y)}^2+{4\mathrm{\τ}}_{\mathrm{xy}}^2};$

Suppose that infinitesimal oblique section area is S ₀, bring above formula into and obtain:

${\mathrm{\σ}}_{\max }=\frac{F/s_0+F/s_0}{2}+\frac{1}{2}\sqrt{{(F/s_0-F/s_0)}^2+4{(F/s_0)}^2};$

σ _max=2F/S ₀；

According to two in Liu Hongwen version mechanics of materials chapter 7 stress-strain analysis, to state stress analysis formula, obtain the maximum stress on this infinitesimal oblique section:

${\mathrm{\σ}}_{\max }=\frac{{\mathrm{\σ}}_x+{\mathrm{\σ}}_y}{2}+\frac{1}{2}\sqrt{{({\mathrm{\σ}}_x-{\mathrm{\σ}}_y)}^2+{4\mathrm{\τ}}_{\mathrm{xy}}^2};$

Suppose that infinitesimal oblique section area is S ₂, bring above formula into and obtain:

${\mathrm{\σ}}_{\max }=\frac{F/s_2+F/s_2}{2}+\frac{1}{2}\sqrt{{(F/s_2-F/s_2)}^2+4{(F/s_2)}^2};$

σ _max=2F/S ₂；

According to two in Liu Hongwen version mechanics of materials chapter 7 stress-strain analysis, to state stress analysis formula, obtain the maximum stress on this infinitesimal oblique section:

${\mathrm{\σ}}_{\max }=\frac{{\mathrm{\σ}}_x+{\mathrm{\σ}}_y}{2}+\frac{1}{2}\sqrt{{({\mathrm{\σ}}_x-{\mathrm{\σ}}_y)}^2+{4\mathrm{\τ}}_{\mathrm{xy}}^2};$

Suppose that infinitesimal oblique section area is S ₃, bring above formula into and obtain:

${\mathrm{\σ}}_{\max }=\frac{F/s_3+F/s_3}{2}+\frac{1}{2}\sqrt{{(F/s_3-F/s_3)}^2+4{(F/s_3)}^2};$

σ _max=2F/S ₃；

Model stress analysis by several structures is known: in the situation that applying same tensile force f, pressure F, the maximum stress of the area of stress concentration of the enclosuring structure that the enclosuring structure that the enclosuring structure that cutting edge instrument of the prior art forms on pipe fitting 50, the first closing device in the utility model form and the second closing device in the utility model form is respectively:

2F/S ₀、2F/S ₂、2F/S ₃；

From above several structural models, know again:

S ₀<S ₂，S ₂<S ₃；

Thereby draw:

2F/S ₀>2F/S ₂、2F/S ₀>2F/S ₃。

Conclusion: use the enclosuring structure that closing device of the present utility model forms at pipe fitting 50 to compare with the enclosuring structure that uses cutting edge instrument to form, stress surface increases, and stress disperses more.

The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (10)

1. for a closing device for pipe fitting, it is characterized in that, comprising:

The first stamping parts (10), comprises the first noumenon (11) and is arranged on the groove (12) on described the first noumenon (11);

The second stamping parts (20), comprise the second body (21) and be arranged on the projection (22) on described the second body (21), described projection (22) arranges accordingly with described groove (12), and described projection (22) has the shape matching with described groove (12).

2. closing device according to claim 1, is characterized in that, the opening of described groove (12) on the upper surface of described the first noumenon (11) is rounded.

3. closing device according to claim 2, it is characterized in that, described groove (12) comprises first paragraph (121) and second segment (122), described second segment (122) is arranged on the bottom of described first paragraph (121), and described second segment (122) is less than or equal to 1/3rd of the opening diameter of described first paragraph (121) on the upper surface of described the first noumenon (11) with the opening diameter of the intersection of described first paragraph (121).

4. closing device according to claim 3, is characterized in that, 83.3% to 116.7% of the diameter that opening diameter described second segment (122) and intersection described first paragraph (121) is described pipe fitting (50).

5. closing device according to claim 1, it is characterized in that, described the first stamping parts (10) also comprises two projections (13), described two projections (13) protrude from described the first noumenon (11) towards the direction of described the first stamping parts (10), and described groove (12) is arranged between described two projections (13).

6. closing device according to claim 5, is characterized in that, the end away from described the first noumenon (11) of described projection (13) is arcs of recesses.

7. closing device according to claim 5, is characterized in that, the distance between described two projections (13) be described pipe fitting (50) diameter 33.3% to 66.7%.

8. closing device according to claim 1, is characterized in that, the depth capacity of described groove (12) be described pipe fitting (50) diameter 50% to 83.3%.

9. closing device according to claim 1, it is characterized in that, described closing device also comprises the first motion arm (30) and the second motion arm (40) being hinged, it is upper that described the first noumenon (11) is arranged on described the first motion arm (30), and described the second body (21) is arranged on described the second motion arm (40).

10. closing device according to claim 9, is characterized in that, described closing device also comprises piston cylinder, and described the first motion arm (30) is connected with the cylinder body of described piston cylinder, and described the second motion arm (40) is connected with the piston rod of described piston cylinder.

Images