Combined threaded valve body and valve

Abstract

The utility model provides a combined threaded valve body and a valve. The combined threaded valve body comprises a main shell and an insert. The main housing includes a substantially coaxial hollow body portion. The insert is in a hollow column shape, the insert is embedded in the main body part of the main shell through injection molding and extends to the two ends of the main shell respectively, threaded connecting parts used for being connected with an external pipeline are formed at the two ends of the insert respectively, the hardness of the insert is larger than that of the main shell, and a plurality of embedded rings distributed in the axial direction of the insert are formed on the peripheral wall of the insert; an annular first embedding part is formed between every two adjacent embedded rings, the peripheral wall of at least one embedded ring comprises a plurality of planes which are sequentially connected end to end, a second embedding part is formed at the position of a protruding edge between every two adjacent planes, and the insert is embedded into the inner peripheral wall of the main body part of the main shell through the first embedding parts and the second embedding parts.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, and particularly relates to a combined screw valve body and valve. BACKGROUND

[0002] Valves are used to open and close pipelines, control flow direction, adjust and control parameters (temperature, pressure and flow) of conveying medium, and are pipeline accessories, which include throttling valves, ball valves, check valves and safety valves and various types. Traditional valves are mainly metal materials, such as copper valves or stainless steel valves, and such valves not only have medium weight but also high cost. With the increasing proportion of plastic pipelines in cold and hot water supply and industrial pipeline engineering applications, plastic valves with the advantages of light weight, corrosion resistance, no absorption of scale and integration with plastic pipelines are gradually applied in pipeline systems (such as valves in electric water heaters).

[0003] Current plastic valves are connected to pipeline systems in a threaded manner, and the threads on the valve need to bear a large torsion force during installation, while the strength of plastic is usually low, and thread breakage or thread wear and leakage problems are prone to occur during installation. In addition, when the plastic valve is applied to high temperature and high pressure occasions, long-term high temperature can accelerate the aging of the plastic and affect the thread strength of the pipeline connection, thereby seriously affecting the service life. SUMMARY

[0004] The utility model discloses in order to overcome the prior art's insufficient, provide a kind of combined screw valve body and valve with high connection strength and long service life.

[0005] In order to achieve the above purpose, the utility model provides a kind of combined screw valve body, it includes main casing and insert piece.Main casing includes substantially coaxial hollow main body portion.Insert piece is hollow column, and insert piece is embedded in the main body portion of main casing by injection molding and extends to the two ends of main casing respectively, and the two ends of insert piece are formed with threaded connection part for connecting external pipeline, the hardness of insert piece is greater than the hardness of main casing, and multiple embedded rings distributed along its axial direction are formed on the outer peripheral wall of insert piece, annular first embedded portion is formed between adjacent embedded rings, and the outer peripheral wall of at least one embedded ring includes multiple planes connected in sequence, second embedded portion is formed at the convex edge between adjacent planes, and insert piece is embedded in the inner peripheral wall of the main body portion of main casing through first embedded portion and second embedded portion.

[0006] According to an embodiment of the utility model, one end of insert piece is substantially flush with one end of main body portion, and internal threaded connection part is formed on the end portion, and the other end of insert piece extends out of the other end of main body portion to form external threaded connection part.

[0007] According to an embodiment of the utility model, part of embedded rings is located on the outer peripheral wall of internal threaded connection part, and the other part of embedded rings is close to external threaded connection part.

[0008] According to an embodiment of the present application, the inner diameter of the inner threaded connection part is larger than the inner diameter of the outer threaded connection part, and the height of the inner embedded ring located at the outer peripheral wall of the inner threaded connection part is larger than the height of the other part of the inner embedded ring close to the outer threaded connection part.

[0009] According to an embodiment of the present application, the radial width of the inner embedded ring is larger than or equal to 1 / 5 of the wall thickness of the main shell body at the embedded position, and the radial width of the inner embedded ring refers to the cross-sectional width of the inner embedded ring in the radial direction of the embedded part.

[0010] According to an embodiment of the present application, the main shell body further comprises a branch part intersecting with the main body part, and the embedded part is formed with a through hole communicating with the branch part and the inside of the embedded part.

[0011] According to an embodiment of the present application, one end of the main body part or the outer peripheral wall of the main body part is formed with a hexagonal connecting part.

[0012] According to an embodiment of the present application, the main shell body is a plastic injection molding part or a rubber injection molding part, and the embedded part is a metal part.

[0013] On the other hand, the present application also provides a valve comprising the combined threaded valve body.

[0014] In summary, the combined threaded valve body provided by the present application comprises a main shell body and an embedded part with a higher hardness than the main shell body, and the two threaded connection parts for connecting external pipelines are formed on the embedded part with high hardness, and the threaded part can withstand large torsion during installation to realize the sealing connection of the pipeline. The first embedded part is formed between the plurality of inner embedded rings distributed in the axial direction on the outer peripheral wall of the embedded part, and the second embedded part is formed between the adjacent flat surfaces on the outer peripheral wall of the inner embedded ring. The two embedded parts together enable the embedded part to be firmly embedded into the main shell body to form a whole, so as to avoid separation of the embedded part and the main shell body due to torsion during installation, thereby realizing a high-strength combined threaded valve body.

[0015] In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 shows a structure schematic diagram of a combined threaded valve body provided by an embodiment of the present application.

[0017] Figure 2 Fig. 2 shows a cross-sectional schematic diagram of the combined threaded valve body of Fig. 1. Figure 1

[0018] Figure 3 Fig. 3 shows an exploded schematic diagram of the combined threaded valve body of Fig. 1. Figure 1

[0019] Figure 4 ​​As shown in Figure 3 Structure diagram of the middle embedded part. DETAILED DESCRIPTION

[0020] As Figures 1 to 4 shown, the combined threaded valve body provided by the embodiment comprises a main shell 1 and an embedded part 2. The main shell 1 comprises a substantially coaxial hollow main body part 11. The embedded part 2 is in a hollow columnar shape, is embedded in the main body part 11 of the main shell 1 by injection molding, and extends to both ends of the main shell 1 respectively, threaded connection parts for connecting external pipelines are formed at both ends of the embedded part 2 respectively, the hardness of the embedded part 2 is greater than that of the main shell 1, and a plurality of embedded rings 21 distributed along the axial direction of the embedded part 2 are formed on the outer circumferential wall of the embedded part 2, annular first embedding parts 22 are formed between adjacent embedded rings 21, the outer circumferential wall of at least one embedded ring 21 comprises a plurality of planes 211 connected end to end in sequence, second embedding parts 23 are formed at the convex edges between adjacent planes, and the embedded part 2 is embedded in the inner circumferential wall of the main body part 11 of the main shell 1 through the first embedding parts 22 and the second embedding parts 23.

[0021] In the combined threaded valve body provided by the embodiment, the threaded connection parts connected with the external pipelines are all formed on the embedded part 2 with high hardness, and the strength of the threaded parts can withstand large torsion during installation, thereby effectively solving the problem that the threaded parts of the existing plastic valve are prone to breakage due to low strength during installation. In the connection between the embedded part 2 and the main shell 1, the first embedding parts 22 and the second embedding parts 23 form a two-stage embedding structure, which not only increases the embedding area but also positions the embedded part 2 from the axial direction and the circumferential direction respectively to further increase the embedding strength. Specifically, during injection molding, the inner circumferential wall of the main body part 11 is embedded in the annular first embedding parts 22 formed by adjacent embedded rings 21, and the embedded part 2 is axially positioned to avoid disengagement of the embedded part 2 from the main body part 11. At the same time, the convex edges between adjacent planes 211 on at least one embedded ring 21 form second embedding parts 23, which are embedded in the inner circumferential wall of the main body part 11 during injection molding, and the inner circumferential wall of the main body part 11 circumferentially positions the convex edges (second embedding parts 23) to avoid rotation of the embedded part 2 relative to the main shell 1 due to torsion during installation. The axial and circumferential positioning achieved by the first embedding parts 22 and the second embedding parts 23 enables the embedded part 2 and the main shell 1 to be stably and highly strongly combined into one.

[0022] In the embodiment, part of the embedded rings 21 are located on the outer circumferential wall of the inner threaded connection part 241, and the other part of the embedded rings 21 are close to the outer threaded connection part 242; this arrangement can enhance the connection strength between the embedded part 2 and the main shell 1 to enable it to withstand greater installation torsion. However, the present application does not make any limitation in this regard. In other embodiments, a plurality of embedded rings can also be uniformly distributed on the outer circumferential wall of the embedded part in the axial direction.

[0023] As Figure 2As shown, the inner diameter of the inner threaded connection portion 241 is larger than that of the outer threaded connection portion 242, that is, the pipe diameter of the external pipeline assembled at the inner threaded connection portion 241 will be larger, and the torsion applied during installation will also be larger. In order to improve the torsion bearing capacity of the insert 2 at this position, the height of the inner insert ring 21 located at the outer peripheral wall of the inner threaded connection portion 241 is larger than that of the other part of the inner insert ring 22 close to the outer threaded connection portion 242. This arrangement makes the inner insert ring 21 at the outer peripheral wall of the inner threaded connection portion 241 have a larger embedded area, and thus has a higher connection strength, as shown in Figure 3 and Figure 4 Further, the inner insert ring 21 located at the outer peripheral wall of the inner threaded connection portion 241 has an outer peripheral wall including a plurality of flat surfaces 211 connected end to end, and the convex edges between adjacent flat surfaces form the second embedded portion 23. The outer peripheral wall of the inner insert ring 21 close to the outer threaded connection portion 242 is a smooth cylindrical peripheral wall to facilitate the flow of plastic or rubber in a molten state and fill into the first embedded portion 22. However, the present utility model does not make any limitation thereon. In other embodiments, the outer peripheral wall of the inner insert ring close to the outer threaded connection portion can also have convex edges to form the second embedded portion. In addition, the height thereof can also be substantially the same as that of the inner insert ring at the outer peripheral wall of the inner threaded connection portion.

[0024] In the present embodiment, as shown in Figure 1 and Figure 2 , one end 2A of the insert is substantially flush with one end 11A of the main body portion and an inner threaded connection portion 241 is formed on this end portion, and the other end 2B of the insert extends out of the other end 11B of the main body portion to form an outer threaded connection portion 242. However, the present utility model does not make any limitation thereon. In other embodiments, the other end of the insert can also be substantially flush with the other end of the main body portion to form an inner threaded connection portion, that is, both ends form inner threaded connection portions. Alternatively, one end of the insert also extends out of one end of the main body portion to form an outer threaded connection portion, that is, both ends form outer threaded connection portions.

[0025] In the present embodiment, the radial width L of the inner insert ring 21 is greater than or equal to 1 / 5 of the wall thickness T of the main housing 1 at the embedded position. The radial width of the inner insert ring 21 refers to the cross-sectional width of the inner insert ring 21 in the radial direction of the insert 2. The greater the radial width of the inner insert ring 21, the deeper the embedded depth, and the insert 2 and the main housing 1 will have a higher bonding strength. However, the present utility model does not make any limitation thereon.

[0026] In order to facilitate installation, the combined threaded valve body provided in the present embodiment has a hexagonal connection portion 13 formed on one end of the main body portion 11, and the installation tool can act on the hexagonal connection portion 13 to install the valve on the external pipeline. However, the present utility model does not make any limitation thereon. In other embodiments, a hexagonal connection portion or other parts that can help the installation tool to apply force can also be provided on the outer peripheral wall of the main body portion.

[0027] In the embodiment, the main shell 1 is a plastic injection molding part, and the insert 2 is a metal part. However, the utility model is not limited to this. In other embodiments, the main shell can also be a rubber injection molding part, and the insert can be a metal part.

[0028] In the embodiment, the combined threaded valve body is the valve body of a safety valve, and the main shell 1 further comprises a branch part 12 intersecting with the main body part 11. Correspondingly, the insert 2 is formed with a through hole 25 communicating the branch part 12 and the inside of the insert 2. However, the utility model is not limited to this.

[0029] Corresponding to the combined threaded valve body described above, the embodiment also provides a valve. The valve is a safety valve, and a pressure relief control element is installed in the branch part 12. When the pressure in the pipeline is greater than a set threshold value, the pressure relief control element opens the branch part 12 to release the pressure in the pipeline, effectively preventing failures caused by excessive pressure in the pipeline. However, the utility model is not limited to this. The high-strength combined threaded valve body based on the main shell and the insert provided by the utility model is also applicable to the valve body of other valves, such as the valve body of a stop valve, the valve body of a check valve, etc.

[0030] In summary, the combined threaded valve body provided by the utility model comprises a main shell and an insert with a higher hardness than the main shell, two threaded connection parts for connecting external pipelines are formed on the insert with high hardness, and the threaded part can withstand large torsion during installation to realize sealed connection of the pipeline. The first embedded part in the form of a ring is formed between the multiple embedded rings distributed in the axial direction on the outer peripheral wall of the insert, and the second embedded part is formed by the convex ribs between the adjacent flat surfaces on the outer peripheral wall of the embedded ring. The two embedded parts together enable the insert to be firmly embedded into the main shell to form a whole, so as to avoid separation of the insert and the main shell due to torsion during installation, thereby realizing a high-strength combined threaded valve body.

[0031] Although the utility model has been disclosed as above by the preferred embodiment, it is not intended to limit the utility model. Any person skilled in the art can make some changes and decorations without departing from the spirit and scope of the utility model, so the protection scope of the utility model shall be subject to the scope claimed in the claims.

Claims

1. A combined threaded valve body characterized by, The utility model relates to a combined threaded valve body, comprising: a main shell, including a hollow main body part; an insert, in the shape of a hollow cylinder, which is injection molded into the main body part of the main shell and extends to both ends of the main shell, respectively, and has a threaded connection part at each end for connecting external pipelines, the hardness of the insert is greater than that of the main shell, and a plurality of inner embedding rings are formed on the outer circumferential wall of the insert and distributed along the axial direction of the insert, a first embedding part in the shape of a ring is formed between adjacent inner embedding rings, and the outer circumferential wall of at least one inner embedding ring includes a plurality of planes connected end to end in sequence, a second embedding part is formed at the convex edge between adjacent planes, and the insert is embedded in the inner circumferential wall of the main body part through the first embedding part and the second embedding part.

2. The combined threaded valve body of claim 1, wherein, The end of the insert is substantially flush with one end of the main body part, and a female threaded connection part is formed on the end, and the other end of the insert extends out of the other end of the main body part to form a male threaded connection part.

3. The combined threaded valve body of claim 1, wherein, Some of the inner embedding rings are located on the outer circumferential wall of the female threaded connection part, and the other inner embedding rings are close to the male threaded connection part.

4. The combined threaded valve body of claim 3, wherein, The inner diameter of the female threaded connection part is greater than that of the male threaded connection part, and the height of the inner embedding rings located on the outer circumferential wall of the female threaded connection part is greater than that of the other inner embedding rings close to the male threaded connection part.

5. The combined threaded valve body of claim 1, wherein, The radial width of the inner embedding rings is greater than or equal to 1 / 5 of the wall thickness of the main shell at the embedding position, and the radial width of the inner embedding rings refers to the cross-sectional width of the inner embedding rings in the radial direction of the insert.

6. The combined threaded valve body of claim 1, wherein, The main shell further includes a branch part intersecting the main body part, and the insert has a through hole formed thereon to communicate the branch part and the inside of the insert.

7. The combined threaded valve body of claim 1, wherein, A hexagonal connection part is formed on one end of the main body part or the outer circumferential wall of the main body part.

8. The combined threaded valve body of claim 1, wherein, The main shell is a plastic injection molding part or a rubber injection molding part, and the insert is a metal part.

9. A valve, characterized by The utility model relates to a combined threaded valve body, comprising: any one of claims 1-8.

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