Valve for pipeline connection

Abstract

The utility model belongs to the technical field of valves, and discloses a valve for pipeline connection, which comprises a valve body, the valve body comprises a main body and two metal inserts, the main body is made of engineering plastics and comprises two connecting ends, and the metal inserts are respectively formed on the outer peripheral sides or the inner peripheral sides of the corresponding connecting ends through injection molding. Anti-skid structures are arranged on the circumferential surfaces, connected with the connecting ends, of the metal inserts, connecting structures are arranged on the two metal inserts respectively, and the metal inserts are connected with the pipeline through the connecting structures. According to the valve used for pipeline connection, the valve body is changed into a split structure, the structure of the engineering plastic main body and the metal insert is adopted, product cost is reduced, and the risk that threads loosen and lose efficacy and the risk that a check ring falls off when the pipeline is connected with the plastic main body are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially a valve for pipeline connection. BACKGROUND

[0002] In household appliances, multi-way valves such as three-way valves and four-way valves are often used to connect multiple pipelines, mainly playing the role of shunting, connecting and converting. For example, in a washing machine, a three-way valve can connect a cold water pipe, a hot water pipe and the washing machine body to achieve water distribution and control. Multi-way valves are also commonly seen in places such as toilets and shower devices in kitchens and bathrooms.

[0003] As shown in Figure 1 The valve body 10 of the conventional multi-way valve is usually made of brass or other metal materials. With the rising price of brass materials, the product cost of the multi-way valve is becoming higher and higher. Moreover, the use of brass materials poses the risk of lead separation, which is harmful to human health. Therefore, the multi-way valve product gradually loses its competitiveness.

[0004] In order to reduce the product cost, in the prior art, the brass material of the valve body 10 is usually replaced by engineering plastic. Although the cost is reduced, the torque cannot meet the use requirements due to the material properties of the engineering plastic. When installing the pipeline, the external thread 101 of the valve body 10 is prone to slipping and failing, and the position of the retaining ring 30 is also prone to falling off due to the large difference in material properties between the engineering plastic and the metal material.

[0005] Therefore, there is an urgent need to provide a valve for pipeline connection to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a valve for pipeline connection, which can solve the technical problems of thread slipping and failure and retaining ring falling off during pipeline connection.

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

[0008] A valve for pipeline connection, comprising a valve body, the valve body comprising a main body and two metal inserts, the main body being made of engineering plastic and comprising two connecting ends, the metal inserts being respectively injection molded on the outer circumferential side or the inner circumferential side of the corresponding connecting end, the metal inserts being provided with anti-slip structures on the circumferential surface connected to the connecting end, two metal inserts being respectively provided with connecting structures, the metal inserts being connected to the pipeline through the connecting structures.

[0009] As an optional solution, the anti-skid structure is a dense convex tooth formed on the circumferential surface of the metal insert.

[0010] As an optional solution, the connecting structures on the two metal inserts are the same.

[0011] As an optional solution, the two metal inserts are respectively embedded on the outer circumferential side of the corresponding connecting end, and the connecting structure is an external thread arranged on the outer side wall of the metal insert.

[0012] As an optional solution, the two metal inserts are respectively embedded on the outer circumferential side of the corresponding connecting end, and the connecting structure includes a check ring and a nut, the outer side wall of the metal insert is provided with a first limiting groove along the circumferential direction, the inner side wall of the nut is provided with a second limiting groove along the circumferential direction, and the check ring can be simultaneously limited in the first limiting groove and the second limiting groove.

[0013] As an optional solution, the two metal inserts are respectively embedded on the inner circumferential side of the corresponding connecting end, and the connecting structure is an internal thread arranged on the inner side wall of the metal insert.

[0014] As an optional solution, the two metal inserts are respectively embedded on the outer circumferential side of the corresponding connecting end, and the connecting structure is a clamp, the metal insert is provided with a first fixed stop, one end of the pipeline is provided with a second fixed stop, the second fixed stop is fitted on the first fixed stop to form a fixed part, the clamp is provided with a limiting hole, the clamp is simultaneously clamped on the metal insert and the pipeline, and the fixed part is arranged in the limiting hole.

[0015] As an optional solution, the two metal inserts are respectively a first metal insert and a second metal insert, the connecting structure includes a first connecting structure and a second connecting structure, the first metal insert is provided with the first connecting structure, the second metal insert is provided with the second connecting structure, and the first connecting structure and the second connecting structure are different.

[0016] As an optional solution, the two metal inserts are respectively embedded on the outer circumferential side of the corresponding connecting end, the first connecting structure is an external thread arranged on the outer side wall of the first metal insert, and the second connecting structure includes a check ring and a nut, the outer side wall of the second metal insert is provided with a first limiting groove along the circumferential direction, the inner side wall of the nut is provided with a second limiting groove along the circumferential direction, and the check ring can be simultaneously limited in the first limiting groove and the second limiting groove.

[0017] As an optional solution, the two metal inserts respectively embed the outer circumferential side of the corresponding connecting end, the first connecting structure is an external thread arranged on the outer side wall of the first metal insert, the second connecting structure is a clamp, the second metal insert is provided with a first fixed stop, one end of the pipeline is provided with a second fixed stop, the second fixed stop is fitted to the first fixed stop to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously arranged on the metal insert and the pipeline, and the fixed part is arranged in the limiting hole.

[0018] As an optional solution, the first metal insert embeds the inner circumferential side of the connecting end, and the second metal insert embeds the outer circumferential side of the connecting end. The first connecting structure is an internal thread arranged on the inner side wall of the first metal insert, and the second connecting structure is an external thread arranged on the outer side wall of the second metal insert.

[0019] As an optional solution, the two metal inserts respectively embed the outer circumferential side of the corresponding connecting end, the first connecting structure is a clamp, the first metal insert is provided with a first fixed stop, one end of the pipeline is provided with a second fixed stop, the second fixed stop is fitted to the first fixed stop to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously arranged on the metal insert and the pipeline, and the fixed part is arranged in the limiting hole.

[0020] The second connecting structure includes a check ring and a nut, a first limiting groove is formed in the circumferential direction of the outer side wall of the second metal insert, a second limiting groove is formed in the circumferential direction of the inner side wall of the nut, and the check ring can be simultaneously limited in the first limiting groove and the second limiting groove.

[0021] As an optional solution, the first metal insert embeds the inner circumferential side of the connecting end, and the second metal insert embeds the outer circumferential side of the connecting end. The first connecting structure is an internal thread arranged on the inner side wall of the first metal insert, and the second connecting structure includes a check ring and a nut. A first limiting groove is formed in the circumferential direction of the outer side wall of the second metal insert, a second limiting groove is formed in the circumferential direction of the inner side wall of the nut, and the check ring can be simultaneously limited in the first limiting groove and the second limiting groove.

[0022] As an optional solution, the first metal insert is embedded on the inner circumferential side of the connecting end, the second metal insert is embedded on the outer circumferential side of the connecting end, the first connecting structure is an internal thread arranged on the inner side wall of the first metal insert, the second connecting structure is a clamp, the second metal insert is provided with a first fixed stop, one end of the pipeline is provided with a second fixed stop, the second fixed stop is fitted on the first fixed stop to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously arranged on the metal insert and the pipeline, and the fixed part is arranged in the limiting hole.

[0023] The utility model discloses beneficial effect:

[0024] The utility model provides a valve for pipeline connection, change valve body to split type structure, adopt the structure of the main part of engineering plastics plus metal insert, reduce product cost. Metal insert is equipped with antiskid structure on the circumferential surface of connecting end, make metal insert and main part combine more firm, prevent the metal insert relative to the main part circumferential rotation or axial movement after forming, metal insert is connected with pipeline through connecting structure, avoid pipeline and plastic main part connection, therefore pipeline and metal insert no matter adopts threaded connection, baffle ring connection or other mode connection can improve the firmness and stability of connection, avoid the risk of thread tooth slipping and the risk of baffle ring falling when pipeline and plastic main part connection, and the demand of installation and use can be satisfied, and the water delivery channel in valve body is isolated from metal insert, avoids the precipitation of heavy metal elements such as lead, can provide more healthy and environmental protection domestic water for people. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the sectional view of the valve for pipeline connection provided by the prior art;

[0026] Figure 2 It is the structure schematic view of the valve for pipeline connection provided by the utility model;

[0027] Figure 3 It is the sectional view of the valve for pipeline connection provided by the utility model embodiment one;

[0028] Figure 4 It is the sectional view of the valve for pipeline connection provided by the utility model embodiment two;

[0029] Figure 5 It is Figure 4 The local enlarged view of A in Fig.

[0030] Figure 6 It is the sectional view of the valve for pipeline connection provided by the utility model embodiment three;

[0031] Figure 7is a sectional view of the valve for pipeline connection provided by the fourth embodiment of the utility model;

[0032] Figure 8 is a sectional view of the valve for pipeline connection provided by the fifth embodiment of the utility model;

[0033] Figure 9 is a sectional view of the valve for pipeline connection provided by the sixth embodiment of the utility model;

[0034] Figure 10 is a sectional view of the valve for pipeline connection provided by the seventh embodiment of the utility model;

[0035] Figure 11 is a sectional view of the valve for pipeline connection provided by the eighth embodiment of the utility model;

[0036] Figure 12 is a sectional view of the valve for pipeline connection provided by the ninth embodiment of the utility model;

[0037] Figure 13 is a sectional view of the valve for pipeline connection provided by the tenth embodiment of the utility model.

[0038] In the drawings:

[0039] 10, valve body; 101, external thread; 20, nut; 30, check ring;

[0040] 1, valve body; 11, main body; 111, connecting end; 12, metal insert; 1201, first metal insert; 1202, second metal insert; 121, anti-skid structure; 122, external thread; 123, first limiting groove; 124, internal thread; 125, first fixed stop;

[0041] 2, connecting structure; 201, first connecting structure; 202, second connecting structure; 21, check ring; 22, nut; 221, second limiting groove;

[0042] 3, pipeline; 31, second fixed stop. DETAILED DESCRIPTION

[0043] The utility model will be further explained in detail below by combining with the drawings and embodiments. It can be understood that the specific embodiments described here are only used for explaining the utility model, and not limited to the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0044] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature is higher than the second feature in horizontal height.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature is less than the second feature in horizontal height.

[0046] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0047] Embodiment one

[0048] As Figure 2 shown, the utility model provides a valve for pipeline connection, the valve can be multiway valve, for example, three-way valve, four-way valve etc., the three-way valve is taken for example in the embodiment to carry out the description.Of course, in other embodiments, the valve can also be any other valve for connecting with pipeline, which is not limited here.

[0049] Specifically, as Figure 3 shown, the valve for pipeline connection includes valve body 1, the valve body 1 includes main body 11 and two metal inserts 12, the main body 11 is made of engineering plastics and includes two connecting ends 111, the metal insert 12 is respectively formed on the outer circumferential side or inner circumferential side of corresponding connecting end 111 by injection molding, the metal insert 12 is provided with anti-skid structure 121 on the circumferential surface connected with connecting end 111, two metal inserts 12 are respectively provided with connecting structure 2, and the metal insert 12 is connected with pipeline 3 through connecting structure 2.

[0050] In the manufacturing, two metal inserts 12 are respectively fixed in advance in the injection mold at appropriate positions, and then plastic is injected for molding, and after the mold is opened, the two metal inserts 12 are tightly embedded in the plastic by the cooled and solidified plastic, so that the valve body 1 with the metal inserts 12 on the main body 11 is obtained, which has strong structural stability.

[0051] In the embodiment, the valve body 1 is changed to a split structure, the main body 11 of engineering plastic is adopted, and the metal insert 12 is adopted, so that the product cost is reduced. The anti-skid structure 121 is arranged on the circumferential surface of the metal insert 12 connected with the connecting end 111, so that the combination between the metal insert 12 and the main body 11 is more firm, the metal insert 12 is prevented from rotating circumferentially or moving axially relative to the main body 11 after molding, the metal insert 12 is connected with the pipeline 3 through the connecting structure 2, the pipeline 3 is directly connected with the main body 11 of plastic, therefore, whether the pipeline 3 and the metal insert 12 are connected in a threaded connection, a check ring connection or other connection mode, the firmness and stability of the connection can be improved, the risk of thread slipping failure and the risk of check ring 21 falling off when the pipeline 3 is connected with the main body 11 of plastic are avoided, the installation and use requirements are met, and the water conveying channel in the valve body 1 is isolated from the metal insert 12, so that heavy metal elements such as lead are prevented from being precipitated, and people can be provided with more healthy and environmentally friendly domestic water.

[0052] In the embodiment, as shown in Figure 3 , the anti-skid structure 121 is a dense convex tooth formed on the inner ring side wall or the outer ring side wall of the metal insert 12. Of course, in other embodiments, the anti-skid structure 121 can also be an anti-skid line formed on the inner ring side wall or the outer ring side wall of the metal insert 12, which is not specifically limited here.

[0053] As shown in Figure 3 , in the embodiment, taking a three-way valve as an example, the two connecting ends 111 of the main body 11 are coaxially arranged, the third connecting end 111 of the main body 11 is perpendicularly arranged with the two connecting ends 111, and the three connecting ends 111 are connected in communication. In other optional embodiments, the three connecting ends 111 can also be connected in other angles, as long as communication can be achieved, which is not specifically limited here.

[0054] In the embodiment, the connecting structures 2 on the two metal inserts 12 are completely the same. Specifically, as shown in Figure 3 , the two metal inserts 12 are respectively embedded on the outer circumferential side of the corresponding connecting end 111, and the connecting structure 2 is an external thread 122 arranged on the outer side wall of the metal insert 12. The pipeline 3 is sleeved on the metal insert 12 and is threadedly connected with the external thread 122 thereof, and the two metal inserts 12 can be respectively threadedly connected with the pipelines 3 on the corresponding sides through the external threads 122. Due to the adoption of the metal insert 12, the torsional moment performance of the external thread 122 is greatly improved, and the risk of thread slipping failure of the external thread 122 during the connection of the pipeline 3 is avoided.

[0055] Embodiment Two

[0056] The embodiment also provides a valve for pipeline connection, which has basically the same structure as the valve provided in Embodiment One, and the same parts will not be described again. The difference is that, as shown in Figure 4 , the connecting structure 2 on the two metal inserts 12 is also the same in this embodiment. Specifically, as shown in Figure 4 and Figure 5 , the two metal inserts 12 are respectively embedded on the outer circumferential side of the corresponding connecting end 111, the connecting structure 2 includes a retainer 21 and a nut 22, the outer side wall of the metal insert 12 is provided with a first limiting groove 123 along the circumferential direction thereof, the inner side wall of the nut 22 is provided with a second limiting groove 221 along the circumferential direction thereof, and the retainer 21 can be simultaneously limited in the first limiting groove 123 and the second limiting groove 221. The nut 22 is provided with an internal thread, and the nut 22 is connected with the pipeline 3 through the internal thread.

[0057] The end surface of the metal insert 12 is provided with a guide inclined surface. During installation, the outer ring of the retainer 21 is first clamped in the second limiting groove 221 of the nut 22, and then one end of the nut 22 is sleeved on the connecting end 111. During installation, the inner ring of the retainer 21 is expanded by the guide inclined surface and gradually clamped into the first limiting groove 123 of the metal insert 12, so as to achieve the purpose of connecting the nut 22 and the metal insert 12, and the installation is convenient and fast. The metal insert 12 and the nut 22 are connected by the retainer 21. Due to the arrangement of the metal insert 12, the nut 22 and the metal insert 12 are both metal parts, the material physical property difference is small, and the retainer 21 can be prevented from falling off.

[0058] It should be noted that the retainer 21 is provided with an adjusting opening to facilitate the expansion adjustment of the retainer 21. In this embodiment, the cross section of the retainer 21 is rectangular. Of course, in other embodiments, the cross section of the retainer 21 can also be circular.

[0059] Embodiment Three

[0060] The embodiment also provides a valve for pipeline connection, which has basically the same structure as the valve provided in Embodiment One, and the same parts will not be described again. The difference is that, as shown in Figure 6 , the two metal inserts 12 are respectively embedded on the inner circumferential side of the corresponding connecting end 111, and the connecting structure 2 is an internal thread 124 arranged on the inner side wall of the metal insert 12. The end portion of the pipeline 3 is provided with an external thread 122, the pipeline 3 is inserted into the metal insert 12 and connected with the internal thread 124 thereof, and the two metal inserts 12 can be respectively connected with the pipeline 3 on the corresponding side through the internal thread 124. Due to the adoption of the metal insert 12, the torsional moment performance of the internal thread 124 is greatly improved, and the risk of tooth slipping failure of the internal thread 124 during connection of the pipeline 3 is avoided.

[0061] Embodiment Four

[0062] The embodiment also provides a valve for pipeline connection, which has basically the same structure as the valve provided in Embodiment One, and the same parts will not be described again. The difference is that, as shown in Figure 7 two metal inserts 12 are respectively embedded on the outer circumferential side of the corresponding connecting end 111, the connecting structure 2 is a clamp, the metal insert 12 is provided with a first fixed stop 125, one end of the pipeline 3 is provided with a second fixed stop 31, the second fixed stop 31 is attached to the first fixed stop 125 to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously arranged on the metal insert 12 and the pipeline 3, and the fixed part is arranged in the limiting hole, so that the installation is convenient and fast.

[0063] The clamp is used to connect the metal insert 12 and the pipeline 3. Since the metal insert 12 is provided, the end of the pipeline 3 and the metal insert 12 are both metal parts, the material physical property difference is small, and the clamp is not easy to fall off. It should be noted that the specific structure of the clamp and the use principle are prior art, and therefore are not shown in the figure.

[0064] Embodiment Five

[0065] The embodiment also provides a valve for pipeline connection, which has basically the same structure as the valve provided in Embodiment One, and the same parts will not be described again. The difference is that, as shown in Figure 8 two metal inserts 12 are respectively embedded on the outer circumferential side of the corresponding connecting end 111, the connecting structure 2 is a clamp, the metal insert 12 is provided with a first fixed stop 125, one end of the pipeline 3 is provided with a second fixed stop 31, the second fixed stop 31 is attached to the first fixed stop 125 to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously arranged on the metal insert 12 and the pipeline 3, and the fixed part is arranged in the limiting hole, so that the installation is convenient and fast.

[0066] Specifically, as shown in Figure 8 two metal inserts 12 are respectively embedded on the outer circumferential side of the corresponding connecting end 111, the first connecting structure 201 is an external thread 122 arranged on the outer side wall of the first metal insert 1201, and the second connecting structure 202 is the same as the connecting structure 2 in Embodiment Two, and can be simultaneously referred to Figure 5 the second connecting structure 202 includes a check ring 21 and a nut 22, a first limiting groove 123 is formed on the outer side wall of the second metal insert 1202 along the circumferential direction, a second limiting groove 221 is formed on the inner side wall of the nut 22 along the circumferential direction, and the check ring 21 can be simultaneously limited in the first limiting groove 123 and the second limiting groove 221.

[0067] The first metal insert 1201 can be connected with the pipeline 3 through the external thread 122. Due to the adoption of the first metal insert 1201, the torque resistance performance of the external thread 122 is greatly improved, and the risk of tooth slipping failure of the external thread 122 during the connection of the pipeline 3 is avoided. The position where the retainer 21 is installed on the valve body 1 adopts the second metal insert 1202. The nut 22 and the second metal insert 1202 are metal parts, and the material physical property difference is small, which can prevent the retainer 21 from falling off, and the installation and use requirements can be met.

[0068] Embodiment six

[0069] The embodiment also provides a valve for pipeline connection. The valve has basically the same structure as the valve provided in embodiment five, and details are not repeated. The difference is that, as shown in Figure 9 two metal inserts 12 are embedded on the outer circumferential side of the corresponding connection end 111. The first connection structure 201 is an external thread 122 arranged on the outer side wall of the first metal insert 1201. The second connection structure 202 is a clamp. The second metal insert 1202 is provided with a first fixed stop 125. One end of the pipeline 3 is provided with a second fixed stop 31. The second fixed stop 31 is attached to the first fixed stop 125 to form a fixed part. The clamp is provided with a limiting hole. The clamp is simultaneously arranged on the metal insert 12 and the pipeline 3. The fixed part is arranged in the limiting hole.

[0070] The first metal insert 1201 can be connected with the pipeline 3 through the external thread 122. Due to the adoption of the first metal insert 1201, the torque resistance performance of the external thread 122 is greatly improved, and the risk of tooth slipping failure of the external thread 122 during the connection of the pipeline 3 is avoided. The second metal insert 1202 can be connected with the pipeline 3 through the clamp. The end of the pipeline 3 and the second metal insert 1202 are metal parts, and the material physical property difference is small. The clamp is not easy to fall off, and the installation and use requirements can be met.

[0071] Embodiment seven

[0072] The embodiment also provides a valve for pipeline connection. The valve has basically the same structure as the valve provided in embodiment five, and details are not repeated. The difference is that, as shown in Figure 10 the first metal insert 1201 is embedded on the inner circumferential side of the connection end 111. The second metal insert 1202 is embedded on the outer circumferential side of the connection end 111. The first connection structure 201 is an internal thread 124 arranged on the inner side wall of the first metal insert 1201. The second connection structure 202 is an external thread 122 arranged on the outer side wall of the second metal insert 1202. One of the pipelines 3 is inserted into the first metal insert 1201 and connected with the internal thread 124. The other end of the pipeline 3 is sleeved on the second metal insert 1202 and connected with the external thread 122.

[0073] The first metal insert 1201 can be connected with the pipeline 3 through the internal thread 124. Due to the adoption of the first metal insert 1201, the anti-torque performance of the internal thread 124 is greatly improved, and the risk of internal thread 124 slipping failure during the connection of the pipeline 3 is avoided. The second metal insert 1202 can be connected with the pipeline 3 through the external thread 122. Due to the adoption of the second metal insert 1202, the anti-torque performance of the external thread 122 is greatly improved, and the risk of external thread 122 slipping failure during the connection of the pipeline 3 is avoided.

[0074] Embodiment eight

[0075] The embodiment also provides a valve for pipeline connection, which has basically the same structure as the valve provided in embodiment five, and the same parts will not be repeated. The difference is that, as shown in Figure 11 two metal inserts 12 are embedded on the outer circumferential side of the corresponding connecting end 111, the first connecting structure 201 is a clamp, the first metal insert 1201 is provided with a first fixed stop 125, one end of the pipeline 3 is provided with a second fixed stop 31, the second fixed stop 31 is attached to the first fixed stop 125 to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously arranged on the metal insert 12 and the pipeline 3, and the fixed part is arranged in the limiting hole; the second connecting structure 202 is the same as the connecting structure 2 in embodiment two, and can be simultaneously referred to Figure 5 The second connecting structure 202 includes a stop ring 21 and a nut 22, a first limiting groove 123 is formed on the outer side wall of the second metal insert 1202 along the circumferential direction, a second limiting groove 221 is formed on the inner side wall of the nut 22 along the circumferential direction, and the stop ring 21 can be simultaneously limited in the first limiting groove 123 and the second limiting groove 221.

[0076] The first metal insert 1201 can be connected with the pipeline 3 through the clamp. The end of the pipeline 3 and the first metal insert 1201 are both metal parts, and the difference in material properties is small, so the clamp is not easy to fall off. The position of the stop ring 21 installed on the valve body 1 adopts the second metal insert 1202. The nut 22 and the second metal insert 1202 are both metal parts, and the difference in material properties is small, which can prevent the stop ring 21 from falling off, and the demand for installation and use is met.

[0077] Embodiment nine

[0078] The embodiment also provides a valve for pipeline connection, which has basically the same structure as the valve provided in embodiment five, and the same parts will not be repeated. The difference is that, as shown in Figure 12 The first metal insert 1201 is embedded on the inner circumferential side of the connecting end 111, the second metal insert 1202 is embedded on the outer circumferential side of the connecting end 111, the first connecting structure 201 is an internal thread 124 arranged on the inner side wall of the first metal insert 1201, and the second connecting structure 202 is the same as the connecting structure 2 in embodiment two, which can be simultaneously referred toFigure 5 The second connecting structure 202 includes a retaining ring 21 and a nut 22. A first limiting groove 123 is provided on the outer side wall of the second metal insert 1202 along its circumference, and a second limiting groove 221 is provided on the inner side wall of the nut 22 along its circumference. The retaining ring 21 can be simultaneously limited within the first limiting groove 123 and the second limiting groove 221.

[0079] The first metal insert 1201 can be connected to the pipeline 3 via the internal thread 124. Due to the use of the first metal insert 1201, the torque resistance of the internal thread 124 is greatly improved, avoiding the risk of stripping failure of the internal thread 124 when connecting the pipeline 3. The position where the retaining ring 21 is installed on the valve body 1 uses the second metal insert 1202. Both the nut 22 and the second metal insert 1202 are metal parts with small differences in material properties, which can prevent the retaining ring 21 from falling off, thus meeting the requirements for installation and use.

[0080] Example 10

[0081] This embodiment also provides a valve for pipeline connection. This valve has a basically the same structure as the valve provided in Embodiment 5, and the similarities will not be repeated here. The differences are as follows: Figure 13 As shown, the first metal insert 1201 is embedded in the inner circumference of the connecting end 111, and the second metal insert 1202 is embedded in the outer circumference of the connecting end 111. The first connecting structure 201 is an internal thread 124 provided on the inner sidewall of the first metal insert 1201, and the second connecting structure 202 is a clamp. The second metal insert 1202 is provided with a first fixed stop 125, and one end of the pipeline 3 is provided with a second fixed stop 31. The second fixed stop 31 fits against the first fixed stop 125 to form a fixing part. The clamp is provided with a limiting hole. The clamp is simultaneously held on the metal insert 1201 and the pipeline 3, and the fixing part passes through the limiting hole.

[0082] The first metal insert 1201 can be connected to the pipe 3 via the internal thread 124. Due to the use of the first metal insert 1201, the torque resistance of the internal thread 124 is greatly improved, avoiding the risk of stripping failure of the internal thread 124 when connecting the pipe 3. The second metal insert 1202 can be connected to the pipe 3 via a clamp. The end of the pipe 3 and the second metal insert 1202 are both metal parts with small differences in material properties, thus meeting the requirement that the clamp is not easy to fall off during installation and use.

[0083] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A valve for pipe connections, characterized in that The utility model provides a valve body (1) comprising a main body (11) made of engineering plastics and comprising two connecting ends (111) and two metal inserts (12) respectively injection molded on the outer circumferential side or the inner circumferential side of the corresponding connecting end (111), wherein the metal inserts (12) are provided with anti-skid structures (121) on the circumferential surface connected with the connecting ends (111), and the metal inserts (12) are connected with pipelines (3) through connecting structures (2) respectively provided thereon.

2. Valve for pipe connections according to claim 1, characterized in that The anti-skid structures (121) are dense convex teeth formed on the circumferential surface of the metal inserts (12).

3. Valve for pipe connections according to claim 1, characterized in that The connecting structures (2) on the two metal inserts (12) are the same.

4. Valve for pipe connections according to claim 3, characterized in that The connecting structures (2) are external threads (122) provided on the outer side walls of the metal inserts (12) when the two metal inserts (12) are respectively embedded on the outer circumferential side of the corresponding connecting end (111).

5. Valve for pipe connections according to claim 3, characterized in that The connecting structures (2) comprise a retainer ring (21) and a nut (22), the outer side walls of the metal inserts (12) are provided with first limiting grooves (123) along the circumferential direction thereof, the inner side walls of the nut (22) are provided with second limiting grooves (211) along the circumferential direction thereof, and the retainer ring (21) can be simultaneously limited in the first limiting grooves (123) and the second limiting grooves (211) when the two metal inserts (12) are respectively embedded on the outer circumferential side of the corresponding connecting end (111).

6. Valve for pipe connections according to claim 3, characterized in that The connecting structures (2) are internal threads (124) provided on the inner side walls of the metal inserts (12) when the two metal inserts (12) are respectively embedded on the inner circumferential side of the corresponding connecting end (111).

7. The valve for pipe connections according to claim 3, characterized in that The connecting structures (2) are clamps when the two metal inserts (12) are respectively embedded on the outer circumferential side of the corresponding connecting end (111), the metal inserts (12) are provided with first fixed retaining platforms (125), one end of the pipelines (3) is provided with second fixed retaining platforms (31), the second fixed retaining platforms (31) are fitted to the first fixed retaining platforms (125) to form fixed parts, the clamps are provided with limiting holes, the clamps are simultaneously clamped on the metal inserts (12) and the pipelines (3), and the fixed parts are arranged in the limiting holes.

8. The valve for pipe connections according to claim 1, characterized in that The two metal inserts (12) are defined as a first metal insert (1201) and a second metal insert (1202), the connecting structures (2) comprise a first connecting structure (201) and a second connecting structure (202), the first connecting structure (201) is provided on the first metal insert (1201), the second connecting structure (202) is provided on the second metal insert (1202), and the first connecting structure (201) is different from the second connecting structure (202).

9. Valve for pipe connections according to claim 8, characterized in that Two metal inserts (12) are respectively embedded on the outer circumferential side of the corresponding connecting end (111), the first connecting structure (201) is an external thread (122) arranged on the outer side wall of the first metal insert (1201), the second connecting structure (202) comprises a check ring (21) and a nut (22), the outer side wall of the second metal insert (1202) is provided with a first limiting groove (123) along the circumferential direction thereof, the inner side wall of the nut (22) is provided with a second limiting groove (211) along the circumferential direction thereof, and the check ring (21) can be simultaneously limited in the first limiting groove (123) and the second limiting groove (211).

10. The valve for pipe connections according to claim 8, characterized in that Two metal inserts (12) are respectively embedded on the outer circumferential side of the corresponding connecting end (111), the first connecting structure (201) is an external thread (122) arranged on the outer side wall of the first metal insert (1201), the second connecting structure (202) is a clamp, the second metal insert (1202) is provided with a first fixed stop (125), one end of the pipeline (3) is provided with a second fixed stop (31), the second fixed stop (31) is attached to the first fixed stop (125) to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously clamped on the metal insert (12) and the pipeline (3), and the fixed part is arranged in the limiting hole.

11. The valve for tubing connections of claim 8, wherein, The first metal insert (1201) is embedded on the inner circumferential side of the connecting end (111), the second metal insert (1202) is embedded on the outer circumferential side of the connecting end (111), the first connecting structure (201) is an internal thread (124) arranged on the inner side wall of the first metal insert (1201), and the second connecting structure (202) is an external thread (122) arranged on the outer side wall of the second metal insert (1202).

12. The valve for tubing connections of claim 8, wherein, Two metal inserts (12) are respectively embedded on the outer circumferential side of the corresponding connecting end (111), the first connecting structure (201) is a clamp, the first metal insert (1201) is provided with a first fixed stop (125), one end of the pipeline (3) is provided with a second fixed stop (31), the second fixed stop (31) is attached to the first fixed stop (125) to form a fixed part, the clamp is provided with a limiting hole, and the clamp is simultaneously clamped on the metal insert (12) and the pipeline (3), and the fixed part is arranged in the limiting hole. The second connecting structure (202) comprises a check ring (21) and a nut (22), the outer side wall of the second metal insert (1202) is provided with a first limiting groove (123) along the circumferential direction thereof, the inner side wall of the nut (22) is provided with a second limiting groove (211) along the circumferential direction thereof, and the check ring (21) can be simultaneously limited in the first limiting groove (123) and the second limiting groove (211).

13. The valve for tubing connections of claim 8, wherein, The first metal insert (1201) is embedded on the inner circumferential side of the connecting end (111), the second metal insert (1202) is embedded on the outer circumferential side of the connecting end (111), the first connecting structure (201) is an internal thread (124) arranged on the inner side wall of the first metal insert (1201), the second connecting structure (202) comprises a check ring (21) and a nut (22), a first limiting groove (123) is arranged on the outer side wall of the second metal insert (1202) along the circumferential direction, a second limiting groove (211) is arranged on the inner side wall of the nut (22) along the circumferential direction, and the check ring (21) can be simultaneously limited in the first limiting groove (123) and the second limiting groove (211).

14. The valve for tubing connections of claim 8, wherein, The first metal insert (1201) is embedded on the inner circumferential side of the connecting end (111), the second metal insert (1202) is embedded on the outer circumferential side of the connecting end (111), the first connecting structure (201) is an internal thread (124) arranged on the inner side wall of the first metal insert (1201), the second connecting structure (202) is a clamp, the second metal insert (1202) is provided with a first fixed stop (125), one end of the pipeline (3) is provided with a second fixed stop (31), the second fixed stop (31) is attached to the first fixed stop (125) to form a fixed part, the clamp is provided with a limiting hole, the clamp is simultaneously arranged on the metal insert (12) and the pipeline (3), and the fixed part is arranged in the limiting hole.

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