JP3222222U - Structure of flange type threaded pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the airtight effect at the bonding portion between the anticorrosive layer and the main body unit and to make the flow of the flow path of the main body unit smooth, thereby improving the use effect of the pipe joint. Provide structure. A pipe joint (4) comprises a body unit (5) and an anticorrosion layer (6) covering the body unit. The main body unit includes a flow passage 5a passing therethrough and a convex edge 51 located at the front end, and the fitting groove 52 is recessed in the convex edge, and the rear side of the convex edge is stepped from the convex edge The rear part in the neck is provided with a receiving part 54 having a diameter smaller than that of the neck. The anticorrosion layer covers the surface of the flow passage in the main unit, the end face of the convex edge, and the outer surface of the socket, and the corrosion prevention layer on the convex surface of the main unit and the outer surface of the socket is 3 Two blocking portions 61 to 63 are formed. [Selected figure] Figure 7

Description

  The present invention relates to the structure of a flange-type screw-in pipe joint, and in particular, improves the effect of using the pipe joint by improving the airtight effect in the adhesion portion between the anticorrosion layer and the main body unit and the smoothness in the flow path of the main body unit. The present invention relates to the structure of a flange-type threaded pipe joint to be

  For transport of liquid or gas, a pipe fitting is used, and by connecting the storage tank and the output piping part by the pipe fitting, shipping or receipt of the liquid or gas becomes convenient. When a liquid or gas having strong corrosive properties has to be transported, the pipe fitting used must also be a pipe joint having corrosion resistance such as acid resistance or alkali resistance, whereby the pipe joint is transported by the liquid or gas to be transported. Can prevent the leakage problem caused by erosion.

  As shown in FIGS. 1, 2 and 3, in the industry, the pipe joint 1 has corrosion resistance effects such as acid resistance and alkali resistance. The pipe fitting 1 includes a body unit 2 and an anticorrosive layer 3 covering the body unit 2. The main body unit 2 is made of a metal material, the main body unit 2 is provided with a flow passage 2a passing therethrough, and the front end of the main body unit 2 is provided with a convex edge portion 21 provided in an annular shape. An annular fitting groove 22 is recessed on the portion 21, and the rear side of the convex edge 21 has a neck 23 formed in a step-like shape from the convex edge, and the rear side of the neck 23 The receiving portion 24 has a diameter smaller than that of the neck portion 23, and a plurality of perforations 25 penetrating the flow path 2a are provided on the periphery of the receiving portion 24. Among them, a chamfered blocking groove 221 is extended on the outside of the bottom of one side of the fitting groove 22 on the convex edge 21 side.

  As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the anticorrosion layer 3 is made of a material in which an erosion resistant material and a plastic are mixed, the anticorrosion layer 3 is inside the body unit 2 and The anticorrosion layer 3 is sprayed to the outside by a coated injection molding method, and more specifically, the anticorrosion layer 3 is the surface of the flow path 2a of the main body unit 2, the end face of the convex edge portion 21, and the outside of the receiving portion 24. At the same time as covering the side, it is also applied in the perforations 25. Among them, the portion of the receiving portion 24 located on the outer surface of the anticorrosion layer 3 is formed in a step shape by the mold at the time of injection, so the piping component P is easily fitted.

  As shown in FIGS. 2 and 4, the pipe joint 1 is used as follows. The flange F is mounted on the outer peripheral surface of the neck 23 of the main unit 2, and after the lock hole F1 of the flange F is drilled by the lock part S, the outlet flange of the liquid or gas storage tank T At the same time as the key hole TF1 of TF is locked, a leakproof gasket W is provided between the flange F and the outlet flange TF, and at the same time the end face of the convex edge 21 of the main unit 2 by the gasket W Be coated. The piping part P is fitted by the receiving part 24 of the main unit 2, and the piping part P and the receiving part 24 are tightened by the hose band C on the outside of the piping part P, The piping component P is prevented from coming off the receptacle 24. Therefore, the corrosive liquid or gas in the storage tank T is introduced from the outlet flange TF into the flow passage 2a in the main unit 2 of the pipe joint 1, and is further introduced into the piping component P. Thus, the corrosive liquid or gas in the storage tank T can be transported to another place.

  In the above-described conventional pipe joint 1, the anticorrosion layer 3 is sprayed on the surface of the flow path 2 a of the main body unit 2, the end face of the convex edge 21, and the outer surface of the receiving port 24. It is true that the corrosive liquid or gas is separated by the anticorrosion layer 3 and the main body unit 2 is corroded by the corrosive liquid or gas by being prevented from directly contacting the main body unit 2 during transportation. It is possible to prevent the occurrence of the disadvantage of leakage, which causes damage. However, since the main body unit 2 made of the plastic and the anticorrosive layer 3 and the metal material is made of materials having two different properties, the anticorrosive layer 3 stably covers the main body unit 2; Leakage prevention is achieved by the detachment prevention mechanism formed on the main body unit 2 only in a state where it does not peel off. In the conventional pipe joint 1 described above, the anticorrosion layer 3 is sprayed and penetrated into the blocking groove 221 by providing the blocking groove 221 on one side of the fitting groove 22 of the main body unit 2. Thus, the blocking portion 31 is formed, and the blocking effect of the blocking portion 31 in the blocking groove 221 is formed. However, the anticorrosion layer 3 in the main body unit 2 is further provided with the blocking portion 31 at only one place due to the influence of the traction force when the anticorrosion layer 3 is sprayed to the main body unit 2 and released after spraying. Therefore, tightness is lost due to the formation of a gap between the anticorrosive layer 3 and the main unit 2. Furthermore, since the perforations 25 in the body unit 2 are excavated, cracks are likely to occur in the vicinity of the perforations 25, and the cracks in the vicinity of the perforations 25 further spray near the perforations 25 in the anticorrosion layer 3. By the generation of the subsequent air bubbles, the airtightness of the anticorrosion layer 3 sprayed to the main body unit 2 is further lost. Furthermore, when transporting the liquid or gas, a constant transport pressure is applied, so the liquid or gas transported from the fitting 1 leaks. Furthermore, when the anticorrosion layer 3 is sprayed, when the piping part P is bound by the hose band C, the blocking portion 32 is formed by soaking into the perforation 25, and the perforation 25 is originally formed. When the blocking portion 32 in the anticorrosion layer 3 which has penetrated into the inside protrudes further to the flow path 2a side, the blocking portion 32 in the anticorrosion layer 3 has a flow rate of the flow path 2a on one side. Adverse effects are caused, on the one hand, the fact that the dirt is caught further adversely affects the flow rate of the flow path 2a.

  The present invention mainly relates to a flange type screwed pipe joint which overcomes the poor airtightness in the adhesion portion between the anticorrosive layer and the main body unit in the conventional pipe joint and the flow path of the main body unit being obstructed by the anticorrosive layer. Aims to provide the structure of

  In order to achieve the above-mentioned object, as the main technical means in claim 1 of the present invention, the structure of a flange-type threaded pipe joint is provided. The pipe joint comprises a main body unit and an anticorrosion layer covering the main body unit. The main unit includes a through flow passage and a convex edge located at the front end, and a fitting groove is recessed in the convex edge, and a rear side of the convex edge is a step from the convex edge The neck on the rear side has a socket smaller in diameter than the neck. The anticorrosion layer covers the surface of the flow passage in the main unit, the end face of the convex edge, and the outer surface of the port, and the convex edge of the main unit and the outer surface of the port Three blocking portions are formed in the anticorrosion layer in.

  The present invention can achieve the following effects by the main technical means in claim 1. Therefore, the airtight effect in the adhesion part of the said anticorrosion layer and the said main body unit can be improved on the one hand, and the flow of the said flow path of the said main body unit can be made smooth on the other hand, and the use effect of the said pipe joint Can be improved.

It is an exploded view of the conventional pipe joint. It is a perspective view of the conventional pipe joint. It is sectional drawing of the conventional pipe joint. It is a usage example of the conventional pipe joint. It is an exploded view of a pipe joint of the present invention. It is a perspective view of a pipe joint of the present invention. It is sectional drawing of the pipe joint of this invention. 5 is another embodiment of the pipe joint of the present invention. It is a working embodiment of the pipe joint of the present invention.

  First, as shown in FIGS. 5 and 6 to be referred to, the pipe joint 4 of the present invention comprises a main body unit 5 and an anticorrosion layer 6 covering the main body unit 5.

  As shown in FIG. 5, FIG. 6, and FIG. 7, the main unit 5 is made of a metal material, the main unit 5 is provided with a flow passage 5a to penetrate, and the front end of the main unit 5 is annularly convexly provided An annular fitting groove 52 is recessed in the convex edge 51, and a rear side of the convex edge 51 is formed in a step-like shape from the convex edge 51. The rear side of the neck 53 is provided with a socket 54 smaller in diameter than the neck 53. An annular convex ring 511 is convexly provided further in front of the end face of the convex edge portion 51, and a blocking concave ring 512 is configured by chamfering on the outside of the upper end of the convex ring 511 and the end face of the convex edge portion 51. In the direction of the flow path 5a in the fitting groove 52, a blocking groove portion 521 configured by a step-like chamfer is extended. On the outer peripheral edge of the receiving portion 54, a receiving surface 541 which is roughened by an embossing method is formed.

  As shown in FIG. 8, in the direction of the flow passage 5 a in the fitting groove 52, a blocking groove portion 521 configured by chamfering is extended.

  As shown in FIG. 5, FIG. 6, and FIG. 7, the anticorrosion layer 6 is made of a material in which a material having corrosion resistance (eg, Teflon (registered trademark) etc.) and plastic are mixed, and the anticorrosion layer 6 is Further, the anticorrosion layer 6 is sprayed on the inner side and the outer side of the main body unit 5 by the cover injection molding method, and more specifically, the anticorrosion layer 6 is the surface of the flow path 5a of the main body unit 5, the end face of the convex edge 51, and And the receiving surface 541 of the receiving portion 54 is covered. Therefore, the anticorrosion layer 6 penetrates into the interruption concave ring 512 of the main body unit 5 to form the first interruption portion 61, and the anticorrosion layer 6 is formed in the interruption groove portion 521 of the main body unit 5. The second blocking portion 62 is formed by soaking in, and the receiving surface 541 of the receiving portion 54 in the main body unit 5 constitutes a rough surface by the embossing method. Therefore, when the said anticorrosion layer 3 is sprayed on the said receiving surface 541, the 3rd interruption | blocking part 63 is comprised. Therefore, by the blocking effect of the first blocking portion 61, the second blocking portion 62, and the third blocking portion 63, a clearance between the anticorrosion layer 6 and the main unit 5 due to a pulling force at the time of releasing after spraying. At the same time as the airtightness in the adhesion part between the anticorrosion layer 6 and the main unit 5 can be ensured by preventing the occurrence of corrosion, the anticorrosion layer sprayed onto the receiving surface 541 by a die The outer surface of 3 is easy to fit the piping component P1 because it is stepped.

  As shown in FIGS. 6, 7 and 9, the pipe joint 4 of the present invention is used as follows. The flange Fa is coated on the outer peripheral surface of the neck portion 53 of the main unit 5, and further, after the lock hole Fa1 of the flange Fa is drilled by the lock part S1, the outlet flange in the liquid or gas storage tank T1 A leakproof gasket W1 is provided between the flange Fa and the outlet flange TFa at the same time as the key hole TFa1 of the TFa is locked, and at the same time the end face of the convex edge 51 of the main unit 5 by the gasket W1. Is coated. The piping component P1 is fitted by the receiving portion 54 of the main unit 5, and the piping component P1 and the receiving portion 54 are tightened by the hose band C1 on the outside of the piping component P1. The piping component P1 is prevented from coming off the receiving portion 54. Therefore, the corrosive liquid or gas in the storage tank T1 is introduced from the outlet flange TFa into the flow passage 5a in the main unit 5 of the pipe joint 4 and further flows into the piping component P1. Thus, the corrosive liquid or gas in the storage tank T1 can be transported to another place.

  As an effect of the present invention, the anticorrosion layer 6 is penetrated into the interruption concave ring 512 of the main body unit 5 to form a first shielding portion 61, and the anticorrosion layer 6 is the same as the shielding of the main body unit 5. The second blocking portion 62 is formed by soaking in the groove portion 521, and the receiving surface 541 of the receiving portion 54 of the main body unit 5 forms a rough surface by an embossing method, thereby forming the second blocking portion 62. When the anticorrosive layer 3 is sprayed on the receiving surface 541, the third blocking portion 63 is formed. Therefore, by the blocking effect of the first blocking portion 61, the second blocking portion 62, and the third blocking portion 63, the traction force at the time of releasing after spraying is between the anticorrosive layer 6 and the main unit 5 It is possible to prevent the formation of a gap, and to ensure the airtightness of the bonding portion between the anticorrosion layer 6 and the main unit 5. Furthermore, the receiving surface 541 of the receiving portion 54 in the main unit 5 constitutes a rough surface by the embossing method, and on the other hand, improves the airtightness effect in the bonding portion between the anticorrosion layer 6 and the main unit 5 Since the flow of the flow path 5a of the main body unit 5 can be smoothed on the one hand, the use effect of the pipe joint 4 can be improved.

DESCRIPTION OF SYMBOLS 1 pipe joint 2 main body unit 21 convex edge 22 fitting groove 221 blocking groove 23 neck 24 socket 25 perforation 2 a flow path 3 corrosion prevention layer 31 blocking portion 32 blocking portion 4 pipe joint 5 main body unit 51 convex edge 511 convex ring 512 blocking concave ring 52 fitting groove 521 blocking groove 53 neck 54 receiving section 541 receiving surface 5a channel 6 anticorrosion layer 61 first blocking section 62 second blocking section 63 third blocking section C, C1 hose band F, Fa flange F1, Fa1 lock hole P, P1 pipe S, S1 chain solid T, T1 storage tank TF, TFa outlet flange TF1, TFa1 key hole W, W1 gasket

Claims (6)

A flange-type threaded pipe joint structure, wherein the pipe joint comprises a main body unit and an anticorrosion layer covering the main body unit, and the main body unit has a through flow passage and a convex edge located at the front end The convex edge is provided with a recessed groove, and the rear side of the convex edge has a step-like neck from the convex edge, and the rear side of the neck has a diameter Comprises a socket smaller than the neck, and the anticorrosion layer covers the surface of the flow passage in the main unit, the end face of the convex edge, and the outer surface of the socket, and A structure of a flange type screwed pipe joint, wherein three blocking portions are formed on the anticorrosion layer on the outer surface of the convex edge portion and the receiving portion. In front of the end face of the convex edge, an annular convex ring is provided so as to protrude, and on the outside of the upper end of the convex ring and the end face of the convex edge, a blocking concave ring is formed by chamfering; The structure of a flange-type threaded joint according to claim 1, wherein a first blocking portion is formed in the anticorrosion layer in the ring. In the inset groove, a blocking groove portion formed by chamfering is extended in the flow direction, and a second blocking portion is formed in the anticorrosion layer in the blocking groove portion. The structure of the flange-type screw-in pipe joint as described in 1. The flange according to claim 2, wherein a rough receiving surface is provided on the outer peripheral edge of the receiving portion, and a third blocking portion is formed on the anticorrosion layer on the receiving surface. Structure of screw-in type fittings. The structure of the flange type threaded pipe joint according to claim 3, wherein the chamfering of the blocking groove portion is stepped. The flanged threaded joint structure according to claim 4, wherein the receiving surface is a rough surface formed by an embossing method.

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