Ball valve

Abstract

The ball valve comprises a valve body, the valve body comprises a first pipe body and a second pipe body which are connected with each other, the first pipe body is provided with a first wrench opening section used for screwing, the first wrench opening section comprises a first wrench opening part, and the outer wall of the first wrench opening part forms a first wrench opening surface; the first pipe body is provided with a first wrench opening section for screwing, the second pipe body is provided with a second wrench opening section for screwing, the second wrench opening section comprises a second wrench opening part, the outer wall of the second wrench opening part forms a second wrench opening surface, the inner wall of the first wrench opening part forms a first adaptive surface corresponding to the first wrench opening surface, and the shape of the first adaptive surface is the same as that of the first wrench opening surface; a second adaptive surface corresponding to the second wrench opening surface is formed on the inner wall of the second wrench opening part; and the shape of the second adaptive surface is the same as that of the second wrench opening surface. The valve body comprises the first pipe body and the second pipe body, the first pipe body and the second pipe body can be produced through the water expansion technology, the production period is shortened, the production cost is low, and the corresponding ball valve is high in structural reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a ball valve. Background Art

[0002] As Figure 1 shown in the figure is the structure of an existing two-piece ball valve, which includes a first pipe body 1′, a second pipe body 2′, a valve seat 3′, a valve ball 4′, a valve stem 5′ and a handle 6′. The first pipe body 1′ and the second pipe body 2′ are produced by precision casting or forging processes. The second pipe body 2′ is fixedly connected to the first pipe body 1′, and the internal space formed after their cooperation forms a valve cavity. The shown valve ball 4′ is installed in the valve cavity, and the left and right ends of the valve ball 4′ are respectively in sealing cooperation through two valve seats 3′. One end of the valve stem 5′ is connected to the valve ball 4′, and the other end of the valve stem 5′ is connected to the handle 6′. When in use, the rotation of the handle 6′ controls the rotation of the valve ball 4′ to realize the opening / closing of the ball valve.

[0003] Figure 1 The structures of the shown first pipe body and the second pipe body adopt very mature precision casting or forging processes. In the field of household ball valves, currently in the market, whether it is a copper ball valve or a stainless steel ball valve, the above structure is adopted. However, both copper ball valves and stainless steel ball valves currently have their own problems and limitations.

[0004] Although copper ball valves have unique advantages in terms of market factors such as processing convenience, price, and mass production, copper ball valves have the problem of heavy metal (lead) precipitation, which is harmful to human health.

[0005] As for the stainless steel ball valve with precision casting process, there are problems such as long production cycle, high difficulty in mass production, and high cost. Content of the Utility Model

[0006] The purpose of the utility model is to provide a ball valve, the valve body of which can be manufactured by hydroforming process, so as to overcome the problems of long production cycle and high cost existing in the existing precision casting process.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A ball valve includes a valve body, the valve body includes a first pipe body and a second pipe body connected to each other. The first pipe body is provided with a first wrench section for screwing, the first wrench section includes a first wrench part, and the outer wall of the first wrench part forms a first wrench surface; the second pipe body is provided with a second wrench section for screwing, the second wrench section includes a second wrench part, and the outer wall of the second wrench part forms a second wrench surface. The inner wall of the first wrench part forms a first mating surface corresponding to the first wrench surface, and the shape of the first mating surface is the same as that of the first wrench surface; the inner wall of the second wrench part forms a second mating surface corresponding to the second wrench surface, and the shape of the second mating surface is the same as that of the second wrench surface.

[0009] In a recommended embodiment, the first pipe body includes a main chamber pipe and a connecting pipe for connecting to a pipeline. One end of the main chamber pipe is fixed to the connecting pipe, and the other end of the main chamber pipe is connected to the second pipe body. Usually, the diameter of the main chamber pipe is larger than that of the connecting pipe. After the main chamber pipe is connected to the second pipe body, a valve chamber is formed, and a valve ball can be installed in the valve chamber.

[0010] In a recommended embodiment, the main chamber pipe and the connecting pipe are of an integral structure, and the wall thicknesses of the main chamber pipe and the connecting pipe are the same. The integral structure and the same wall thickness are beneficial to improving the structural reliability.

[0011] In a recommended embodiment, the first wrench section is provided on the connecting pipe. The connecting pipe further includes a first threaded section, which is located beside the first wrench section and in the axial extension direction of the first wrench section. The first wrench section is located beside the first threaded section, that is, the inner / outer wall of the first wrench section is not turned with threads, so as to ensure the structural strength of the first wrench section and the reliability of the first pipe body.

[0012] In a recommended embodiment, the connecting pipe further includes an abutting section, and both ends of the abutting section are respectively connected to the first wrench section and the main chamber pipe. One end of the first wrench section is connected to the first threaded section, and the first wrench section protrudes outwards. As a preferred manner, the first wrench section protrudes from the abutting section and the first threaded section. This structural design makes a "diameter reduction" effect formed between the first wrench section and the main chamber pipe, ensuring that the diameters of the connecting pipe and the main chamber pipe are close to each other, which is more beneficial to hydroforming.

[0013] In a recommended embodiment, the first wrench section further includes a first frustum portion and a second frustum portion. The large-diameter end of the first frustum portion is connected to one end of the first wrench portion, and the small-diameter end of the first frustum portion is connected to the first threaded section; the large-diameter end of the second frustum portion is connected to the other end of the first wrench portion, and the small-diameter end of the second frustum portion is connected to the abutting section. The axial cross-section of the first wrench section is generally trapezoidal, and this trapezoidal structure can further improve the structural strength of the first wrench section and is also more beneficial to hydroforming.

[0014] In a recommended embodiment, the second pipe body further includes a second threaded section for connecting to a pipeline, which is located beside the second wrench section and in the axial extension direction of the second wrench section. The second wrench section is located beside the second threaded section, that is, the inner / outer wall of the second wrench section is not turned with threads, so as to ensure the structural strength of the second wrench section and the reliability of the second pipe body.

[0015] In a recommended embodiment, the second pipe body further includes a radial retaining ring and a third threaded section for connecting to the first pipe body, and one end of the third threaded section is connected to the radial retaining ring. After assembly, the radial retaining ring is used to axially limit the valve seat and prevent axial displacement of the valve core.

[0016] In a recommended embodiment, the second pipe body further includes a reduced-diameter section and a limiting portion for limiting. One end of the radial retaining ring is connected to one end of the reduced-diameter section, and the other end of the radial retaining ring is connected to the third threaded section; one end of the limiting portion is connected to the other end of the reduced-diameter section, and the other end of the limiting portion is connected to the second wrench section. The setting of the reduced-diameter section can increase the structural strength on the one hand and is also easier to form by hydroforming on the other hand. In addition, after assembly, the limiting portion abuts against the port of the first pipe body to ensure accurate positioning.

[0017] In a recommended embodiment, the radial cross-sections of the first wrench surface and the first mating surface are both regular polygons; the radial cross-sections of the second wrench surface and the second mating surface are both regular polygons, which have good structural stability.

[0018] Advantages of the present utility model:

[0019] The valve body of the present utility model includes a first pipe body and a second pipe body. The first pipe body and the second pipe body can be respectively produced by hydroforming process. Not only the production cycle is shortened and the production cost is low, but also the corresponding ball valve has high structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional structure diagram of the prior art;

[0021] Figure 2 is a schematic three-dimensional structure diagram of the present utility model;

[0022] Figure 3 is a schematic cross-sectional structure diagram of the present utility model.

[0023] Figure 4 is a schematic cross-sectional structure diagram of the first pipe body.

[0024] Figure 5 is Figure 4 an enlarged structure diagram of part A in

[0025] Figure 6 is a schematic cross-sectional structure diagram of the second pipe body.

[0026] Figure 7 is Figure 6 an enlarged structure diagram of part B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the horizontal height of the first feature is lower than that of the second feature.

[0030] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] Refer simultaneously to Figure 2 and Figure 3 , a ball valve, comprising a valve body 1, a valve ball 11, a valve stem 12, a handle 13, a left valve seat 14, and a right valve seat 15. The valve body 1 includes a first pipe body 2 and a second pipe body 3 which are connected to each other. The internal spaces of the first pipe body and the second pipe body form a valve cavity. The valve ball 11 is installed in the valve cavity (not marked in the figure). The left and right ends of the valve ball 11 are respectively in sealing fit with the left valve seat 14 and the right valve seat 15. One end of the valve stem 12 is connected to the valve ball 11, and the other end of the valve stem 12 is connected to the handle 13.

[0032] Refer simultaneously to Figure 4, the first tube body 2 includes a main chamber tube 4 for installing the valve ball 11 and a connecting tube 5 for connecting to a pipeline. The main chamber tube 4 and the connecting tube 5 are of an integral structure, and the wall thicknesses of the main chamber tube 4 and the connecting tube 5 are the same. Referring to the attached drawings, one end of the main chamber tube 4 is fixed to the connecting tube 5, and the other end of the main chamber tube 4 is connected to the second tube body 3. The diameter of the main chamber tube 4 is larger than that of the connecting tube 5, and inside the main chamber tube 4, a valve seat groove 41 is formed at the connection between the main chamber tube 4 and the connecting tube 5, and the right valve seat 15 is placed in this valve seat groove 41.

[0033] In this embodiment, along its axial direction, the connecting tube 5 sequentially includes a first threaded section 51, a first wrench section 52, and a connecting section 53 from right to left.

[0034] Internal threads are provided in the first threaded section 51 for connecting to a pipeline.

[0035] The first wrench section 52 includes a first wrench portion 521 for screwing, and an outer wall of the first wrench portion 521 forms a first wrench surface 5211; an inner wall of the first wrench portion 521 forms a first mating surface 5212 corresponding to the first wrench surface 5211, and the shape of the first mating surface 5212 is the same as that of the first wrench surface 5211, that is, whatever shape the first wrench surface 5211 is, the first mating surface 5212 is the corresponding shape. Referring to Figure 2 , in this embodiment, the shapes of both the first wrench surface 5211 and the first mating surface 5212 are regular octagons.

[0036] Also referring to Figure 5 , the first wrench section 52 further includes a first frustum portion 522 and a second frustum portion 523. A large-diameter end of the first frustum portion 522 is connected to one end of the first wrench portion 521, and a small-diameter end of the first frustum portion 522 is connected to the first threaded section 51. A large-diameter end of the second frustum portion 523 is connected to the other end of the first wrench portion 521, and a small-diameter end of the second frustum portion 523 is connected to the connecting section 53.

[0037] Both ends of the connecting section 53 are respectively connected to the first wrench section 52 and the main chamber tube 4.

[0038] Also referring to Figure 6 and Figure 7 , along its axial direction, the second tube body 3 sequentially includes a second threaded section 31, a second wrench section 32, a limiting portion 33, a reduced-diameter section 34, a radial retaining ring 35, and a third threaded section 36 from left to right.

[0039] Internal threads are provided in the second threaded section 31 for connecting to a pipeline.

[0040] The second wrench section 32 includes a first connecting portion 321, a second connecting portion 322, and a second wrench portion 323 for screwing. The outer wall of the second wrench portion 323 forms a second wrench surface 3231, and the inner wall of the second wrench portion 323 forms a second mating surface 3232 corresponding to the second wrench surface 3231. The second mating surface 3232 has the same shape as the second wrench surface 3231, that is, the second wrench surface 3231 and the second mating surface 3232 form similar figures with each other. Whatever shape the second wrench surface 3231 is, the corresponding second mating surface 3232 is of a similar shape, except that the sizes of the two are different, and the area of the second mating surface 3232 is slightly smaller than that of the second wrench surface 3231. In this embodiment, the radial cross-sections of the second wrench surface 3231 and the second mating surface 3232 are both regular octagons.

[0041] The limiting portion 33 includes an axial section 331 and a radial section 332 that are connected to each other. The axial section 331 in this embodiment has the maximum outer diameter of the second pipe body 3. One end of the above-mentioned radial section 332 is connected to the axial section 331, and the other end of the radial section 332 extends in the direction of the central axis of the axial section 331, that is, in the direction of diameter reduction. The diameter of the axial section 331 is generally greater than or equal to the outer diameter of the first pipe body 3. During installation, the radial section 332 abuts against the port of the first pipe body 2 to ensure accurate positioning during assembly.

[0042] Both the first connecting portion 321 and the second connecting portion 322 are frustum-shaped. Among them, the large-diameter end of the first connecting portion 321 is connected to one end of the second wrench portion 323, and the small-diameter end of the first connecting portion 321 is connected to the second threaded section 31. The large-diameter end of the second connecting portion 322 is connected to the axial section 331 of the limiting portion 33, and the small-diameter end of the second connecting portion 322 is connected to the other end of the second wrench portion 323.

[0043] The radial retaining ring 35 extends radially and is annular, and is used for axially limiting the left valve seat 14 above and preventing the valve ball 11 from axially displacing.

[0044] Both the reduced-diameter section 34 and the third threaded section 36 extend along the axis of the second pipe body 3. External threads are provided on the third threaded section 36 for threaded connection with the main chamber pipe 4 of the first pipe body 2. The outer diameter of the reduced-diameter section 34 is smaller than the outer diameter of the third threaded section 36. In this embodiment, the large-diameter end of the radial retaining ring 35 is connected to the third threaded section 36, and the small-diameter end of the radial retaining ring 35 is connected to the right end of the reduced-diameter section 34; the left end of the reduced-diameter section 34 is connected to the other end (small-diameter end) of the radial section 332, so that an annular groove (not marked in the figure) is formed between the limiting portion 33 and the third threaded section 36.

[0045] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A ball valve, comprising a valve body (1), the valve body (1) includes a first pipe body (2) and a second pipe body (3) connected to each other, a first wrench section (52) for screwing is provided on the first pipe body (2), the first wrench section (52) includes a first wrench part (521), and an outer wall of the first wrench part (521) forms a first wrench surface (5211); a second wrench section (32) for screwing is provided on the second pipe body (3), the second wrench section (32) includes a second wrench part (323), and an outer wall of the second wrench part (323) forms a second wrench surface (3231), characterized in that: The inner wall of the first wrench opening part (521) forms a first mating surface (5212) corresponding to the first wrench opening surface (5211), and the shape of the first mating surface (5212) is the same as that of the first wrench opening surface (5211); the inner wall of the second wrench opening part (323) forms a second mating surface (3232) corresponding to the second wrench opening surface (3231), and the shape of the second mating surface (3232) is the same as that of the second wrench opening surface (3231).

2. The ball valve according to claim 1, characterized in that: The first pipe body (2) includes a main chamber pipe (4) and a connecting pipe (5) for connecting with a pipeline. One end of the main chamber pipe (4) is fixed to the connecting pipe (5), and the other end of the main chamber pipe (4) is connected to the second pipe body (3).

3. The ball valve according to claim 2, wherein: The main chamber pipe (4) and the connecting pipe (5) are of an integral structure, and the wall thicknesses of the main chamber pipe (4) and the connecting pipe (5) are the same.

4. The ball valve according to claim 2, characterized in that: The first wrench opening section (52) is arranged on the connecting pipe (5). The connecting pipe (5) further includes a first threaded section (51), and the first threaded section (51) is located beside the first wrench opening section (52) and is in the axial extension direction of the first wrench opening section (52).

5. The ball valve according to claim 4, wherein: The connecting pipe (5) further includes a connecting section (53). The two ends of the connecting section (53) are respectively connected to the first wrench opening section (52) and the main chamber pipe (4). One end of the first wrench opening section (52) is connected to the first threaded section (51), and the first wrench opening section (52) protrudes outwards.

6. The ball valve according to claim 5, wherein: The first wrench opening section (52) further includes a first frustum part (522) and a second frustum part (523). The large-diameter end of the first frustum part (522) is connected to one end of the first wrench opening part (521), and the small-diameter end of the first frustum part (522) is connected to the first threaded section (51); the large-diameter end of the second frustum part (523) is connected to the other end of the first wrench opening part (521), and the small-diameter end of the second frustum part (523) is connected to the connecting section (53).

7. The ball valve according to claim 1, characterized in that: The second pipe body (3) further includes a second threaded section (31) for connecting with a pipeline. The second threaded section (31) is located beside the second wrench opening section (32) and is in the axial extension direction of the second wrench opening section (32).

8. The ball valve according to claim 7, wherein: The second pipe body (3) further includes a radial retaining ring (35) and a third threaded section (36) for connecting with the first pipe body (2). One end of the third threaded section (36) is connected to the radial retaining ring (35).

9. The ball valve according to claim 8, wherein: The second pipe body (3) further includes a reduced-diameter section (34) and a limiting part (33) for limiting. One end of the radial retaining ring (35) is connected to one end of the reduced-diameter section (34), and the other end of the radial retaining ring (35) is connected to the third threaded section (36); one end of the limiting part (33) is connected to the other end of the reduced-diameter section (34), and the other end of the limiting part (33) is connected to the second wrench opening section (32).

10. The ball valve according to claim 1, characterized in that: The radial cross-sections of the first wrench opening surface (5211) and the first mating surface (5212) are both regular polygons; the radial cross-sections of the second wrench opening surface (3231) and the second mating surface (3232) are both regular polygons.

Images