PE ball valve

Abstract

The utility model relates to the technical field of polyethylene pipeline systems, in particular to a PE ball valve which comprises a valve body, a valve cavity is formed in the valve body, the left end and the right end of the valve cavity are open, a valve element is installed in the valve cavity, supporting blocks are arranged at the left end and the right end of the valve cavity and abut against the valve element, and the face, making contact with the valve cavity, of each supporting block protrudes to form an inverted buckle. A clamping groove is formed in the valve cavity, and the inverted buckle is connected with the clamping groove in a clamped mode. The supporting block can be simply and conveniently installed in the valve cavity, the installation efficiency and precision of the supporting block are improved, and the supporting block is prevented from falling off or deviating in the follow-up welding operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to polyethylene pipeline system technical field more particularly, it relates to a kind of PE ball valve. BACKGROUND

[0002] PE pipe is widely used in urban buried water supply, gas pipeline system because of its toughness, corrosion resistance, good connectivity, good strength, environmental protection and other characteristics, PE ball valve and PE pipe are made of the same material, also have the same advantages and characteristics, so it is used as PE pipeline system control element matching. PE ball valve is provided with support block to support valve core. The existing PE ball valve support block on the market is installed by thread or electric melting, which has the following disadvantages: thread installation needs special equipment to rotate the support block into the valve body, and the sealing ring contacts the spherical surface during rotation. It needs to rotate to a certain depth to be in place, and the sealing ring is also affected by the rotation force during this process, which may cause deformation of the assembly position. After rotation, the equipment will not stop immediately but will stop after a certain force is applied, and the parts will be damaged by stress. Therefore, the thread installation equipment is complex, and the parts may be deformed or damaged during installation. Further, the installation position of the support block deviates. Electric melting installation is to arrange electric melting welding heating wire on the outer diameter surface of the support block, and then clamp the support block into the valve body matching position, and then connect the support block and the valve body together by electric melting welding. This method needs electric melting wiring and electric melting welding machine welding, which is complex, high in production cost and low in efficiency. At the same time, PE material is relatively soft during electric melting welding, and is easy to deform under external force, so that the position of the support block deviates. SUMMARY

[0003] In order to solve the problems of complex installation process, low installation efficiency and position deviation during installation in the prior art, the utility model provides a PE ball valve, which can simply and conveniently install the support block in the valve cavity, improving the installation efficiency and precision of the support block.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a PE ball valve, which comprises a valve body, the valve body has a valve cavity, the left and right ends of the valve cavity are open, a valve core is installed in the valve cavity, support blocks are arranged at the left and right ends of the valve cavity, the support blocks abut against the valve core, one side of the support blocks in contact with the valve cavity is convex and forms a reverse buckle, a clamping groove is formed in the valve cavity, and the reverse buckle is clamped with the clamping groove.

[0005] In the technical solution, the valve body has a valve cavity inside, fluid can flow into or out of the valve cavity from the openings at both ends of the valve cavity, the valve cavity has a valve core inside, the valve core can close or open the valve cavity by rotating. Because a gap needs to be provided between the valve core and the wall of the valve cavity to provide a passage for the flow of fluid and ensure that the valve cavity has sufficient space for fluid flow, the valve core cannot directly abut the cavity of the valve cavity at some positions, so a support block needs to be provided. The support block is arranged at both ends of the valve cavity to support the valve core from both sides. When installing the support block, the support block needs to be pre-installed in the matching position in the valve cavity, and then the end face part and the end face part of the valve cavity are welded together with the end pipe. In this process, the part of the support block that abuts against the valve core exerts a certain force on the support block, and it is necessary to ensure that the support block is always matched stably with the valve cavity during the welding process. Therefore, a reverse buckle is formed on the side of the support block that is in contact with the valve cavity, and a clamping groove is formed at both ends of the valve cavity. After the support block is pressed into the valve cavity, the reverse buckle is clamped into the clamping groove, and the pre-installation of the support block is completed, meeting the requirements of the subsequent welding process and being easy to install. In this process, the support block is simple and convenient to install, and through the cooperation of the reverse buckle and the clamping groove, it is not necessary to continuously press the support block manually to maintain its position, thereby reducing the labor load of the workers, ensuring the stability and accuracy of the position of the support block, guaranteeing the welding quality of the subsequent welding process, and improving the assembly efficiency of the support block.

[0006] Preferably, the support block is annular in structure, an inner circumferential surface of the support block is provided with an inwardly recessed arc surface on one side facing the valve core, the reverse buckle is arranged on an outer circumferential surface of the support block close to one end of the valve core, and the support block is vertically installed in the valve cavity.

[0007] Preferably, the inner circumferential surface of the annular structure is provided with a mounting groove, and a sealing ring is arranged in the mounting groove and abuts against the surface of the valve core.

[0008] Preferably, the reverse buckle is a triangular structure with a height increasing away from the valve core.

[0009] Preferably, the reverse buckle is provided with at least two, and the two reverse buckles are arranged along the axial direction of the support block.

[0010] Preferably, the height of the side wall surface of the clamping groove on the innermost side of the valve cavity towards the inner side of the valve cavity is higher than that of the side wall surface on the other side, the side wall surface on the higher side of the clamping groove forms a positioning step, and the positioning step abuts against the support block.

[0011] Preferably, a U-shaped groove is formed on the end face of the support block close to the valve core.

[0012] Preferably, multiple U-shaped grooves are provided, and the multiple U-shaped grooves are evenly arranged on the support block along the circumferential direction.

[0013] Preferably, the valve body has a through hole communicating with the valve cavity, a valve stem is inserted into the through hole, and the valve stem is connected to the valve core.

[0014] Preferably, the valve stem has a stem head at one end inserted into the valve body, the stem head is fixedly connected to the valve stem, the stem head is connected to the top surface of the valve core, and the diameter of the stem head is larger than the diameter of the through hole.

[0015] Compared with existing technologies, the advantages of this invention are as follows: A support block is installed inside the valve cavity of the valve body to support the valve core from both sides, ensuring the valve core's stable position. The support block has an overbite that engages with a slot located within the valve cavity, allowing for quick installation and stable positioning of the support block within the valve cavity. This ensures that the support block will not fall off or shift position during subsequent welding, guaranteeing the installation accuracy of the support block and the assembly quality of the PE ball valve. Furthermore, the installation process is simple and quick, improving the assembly efficiency of the support block. Attached Figure Description

[0016] Figure 1 This is a half-sectional view of the PE ball valve of this utility model;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a three-dimensional view of the support block in the PE ball valve of this utility model.

[0019] In the attached diagram: 1. Valve body; 2. Valve cavity; 3. Valve core; 4. Valve stem; 5. Support block; 6. Valve cap; 11. Through hole; 21. Slot; 22. Positioning step; 41. Stem head; 51. Undercut; 52. U-shaped groove; 53. Mounting groove; 54. Sealing ring; 55. Arc-shaped surface. Detailed Implementation

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0023] Example 1

[0024] like Figure 1As shown, a PE ball valve includes a valve body 1, which has a valve cavity 2. The valve cavity 2 is open at both ends. A valve core 3 is installed in the valve cavity 2. Support blocks 5 are provided at both ends of the valve cavity 2, and the support blocks 5 abut against the valve core 3. The side of the support block 5 that contacts the valve cavity 2 has a protruding buckle 51. A slot 21 is provided in the valve cavity 2, and the buckle 51 engages with the slot 21. The valve cavity 2 inside the valve body 1 is used to accommodate the valve core 3 and provide a passage for fluid to pass through. Fluid can flow into or out of the valve cavity 2 through the two open ends of the valve cavity 2. In order to ensure that the valve cavity 2 has sufficient space for fluid flow, a certain gap needs to be provided between the valve core 3 and the cavity wall of the valve cavity 2. Part of the valve core 3 cannot directly abut against the cavity of the valve cavity 2, so the valve core 3 at this position lacks support. Therefore, support blocks 5 are required. Support blocks 5 are located at the upper and lower ends of valve cavity 2, supporting valve core 3 from both left and right directions. The two support blocks 5 are installed into valve cavity 2 through openings at both ends. When installing support blocks 5, they need to be pre-installed into their mating positions within valve cavity 2, and then their end faces and valve cavity 2 end faces are welded together with the end pipe. During this process, support blocks 5 abut against valve core 3, and support blocks 5 need to overcome the force exerted on them by valve core 3 to ensure stable mating with valve cavity 2 throughout the welding process. Therefore, a buckle 51 is protruding on the side of support block 5 that contacts valve cavity 2. Slots 21 are provided at both ends of valve cavity 2. After pressing support blocks 5 into valve cavity 2, buckles 51 are engaged in slots 21, completing the pre-installation of support blocks 5 and meeting the requirements of subsequent welding processes, making installation convenient. In this process, the support block 5 is easy and convenient to install. With the cooperation of the inverted buckle 51 and the slot 21, there is no need for continuous manual pressing to maintain the position of the support block 5, which reduces the labor load of the workers, ensures the stability and accuracy of the position of the support block 5, guarantees the welding quality of the subsequent welding process, and improves the assembly efficiency of the support block 5.

[0025] like Figure 2 , 3As shown, the support block 5 has a ring-shaped structure. The inner circumferential surface of the support block 5, facing the valve core 3, has an inwardly recessed arc-shaped surface 55. An inverted buckle 51 is positioned on the outer circumferential surface of the support block 5 near the valve core 3. The support block 5 is vertically installed inside the valve cavity 2. By designing the support block 5 as a ring structure, a single support block 5 abuts against the valve core 3 from multiple directions, thus providing support for the valve core 3 from multiple directions. Simultaneously, the inner side of the ring structure provides a channel for fluid flow. The arc-shaped surface on the support block 5 matches the shape of the valve core 3, preventing sharp edges on the surface of the support block 5 from scratching the surface of the valve core 3 and restricting the normal rotation of the valve core 3. Meanwhile, the arc-shaped surface 55 of the support block 5 gives the support block 5 a structure that gradually thickens away from the valve core 3. This design allows the thinner part of the support block 5 to undergo greater elastic deformation during installation. The height of the protruding part of the support block 5 from the outer periphery of the support block 5 can be designed to be higher, making the support block 5 more securely fastened. At the same time, the end of the support block 5 that is close to the valve core 3 and away from the end that needs to be welded is closer to the support block 5. This avoids the problem of the support block 5 softening during the welding heat absorption process, which could lead to the support block 5 loosening during the welding process and thus causing welding deviation.

[0026] like Figure 2 , 3 As shown, the inner annular surface of the ring structure is provided with a mounting groove 53, and a sealing ring 54 is disposed in the mounting groove 53, abutting against the surface of the valve core 3. The contact between the sealing ring 54 and the valve core 3 enhances the sealing performance between the valve core 3 and the support block 5, ensuring that fluid will not leak through the gap between the support block 5 and the valve core 3 after the valve core 3 is closed. The mounting groove 53 ensures that the position of the sealing ring 54 is stable and will not shift.

[0027] like Figure 2 As shown, the inverted buckle 51 has a triangular cross-section with its height increasing towards the direction away from the valve core 3. This design ensures that when installing the support block 5, the lower end of the inverted buckle 51 faces the valve cavity 2, making it easier to insert the inverted buckle 51 into the valve cavity 51 and reducing its impact on the installation of the support block 5. Furthermore, it ensures that the end of the inverted buckle 51 away from the valve core 3 has sufficient height, preventing it from easily detaching after being engaged in the slot 21.

[0028] like Figure 2 As shown, at least two inverted buckles 51 are provided, and the two inverted buckles 51 are arranged along the axial direction of the support block 5. During normal operation of the ball valve, especially when it is closed, the valve core 3 is pushed by the fluid pressure, which will generate a strong thrust on the support block 5. Therefore, by providing at least two inverted buckles 51, the robustness of the support block 5 in the valve cavity 3 is increased, and the safety performance of the product is improved.

[0029] like Figure 3As shown, the side wall of the groove 21 located at the innermost side of the valve cavity 2 facing the inside of the valve cavity 2 is higher than the side wall of the other side. The side wall of the groove 21 on the higher side forms a positioning step 22, which abuts against the support block 5. The sealing ring 54 is installed inside the support block 5. The sealing compression of the sealing ring 54 is affected by the accuracy of the fitting position of the support block 5 in the valve cavity 2. Therefore, the positioning step 22, which is located on the side of the groove 21 in the valve cavity 2 with the axis as the axial position, is used to cooperate with the support block 5 to control the axial installation position and accuracy of the support block 5.

[0030] Example 2

[0031] This embodiment is similar to Embodiment 1 above, except that, as Figure 3 As shown, a U-shaped groove 52 is provided on the end face of the support block 5 near the valve core 3. During the installation process, the end of the support block 5 near the valve core 3 needs to be compressed inward by the inner wall of the valve cavity 3 before it can be pressed into the slot 31 in the valve cavity 2 for installation. The structurally intact support block 5 is not easy to deform under pressure, making it difficult to insert the support block 5 into the valve cavity 2. Therefore, the U-shaped groove 52 is required. The U-shaped groove 52 provides space for the deformation of the support block 5, so that when the various parts of the support block 5 deform, they will not interfere with each other and cause deformation difficulties, making the installation of the support block 5 simple. At the same time, it allows the support block 5 to have a greater deformation during installation, so that a higher inverted buckle 51 can be set on the support block 5, enhancing the fixing effect of the inverted buckle 51 on the support block 5.

[0032] like Figure 1 As shown, multiple U-shaped grooves 52 are provided, and these grooves 52 are evenly arranged on the support block 5 along the circumferential direction. If only a single U-shaped groove 52 is provided, all deformation during the installation of the support block 5 will be concentrated at that point, resulting in a large deformation and potentially damaging the structure of the support block 5 at that location due to excessive deformation. Therefore, multiple U-shaped grooves 52 are provided, and these grooves 52 are evenly arranged on the support block 5 along the circumferential direction. This ensures that the deformation of the support block 5 when compressed is evenly distributed among the various U-shaped grooves 52, preventing excessive concentration of deformation in one place and thus avoiding damage to the structure of the support block 5.

[0033] Example 3

[0034] This embodiment is similar to Embodiment 1 above, except that, as Figure 1 As shown, the valve body 1 has a through hole 11 on its upper surface that communicates with the valve cavity 2. A valve stem 4 is inserted into the through hole 11, and the valve stem 4 is connected to the valve core 3. The valve stem 4 is inserted into the valve cavity 2 through the through hole 11 and connected to the valve core 3. During operation, the operator can rotate the valve stem 4 from the outside, thereby causing the valve core 3 to rotate, thus opening or closing the valve cavity 2 channel to open or block the flow of fluid in the valve cavity 2.

[0035] like ​ As shown, the valve stem 4 is inserted into the valve body 1 at one end with a stem head 41. The stem head 41 is fixedly connected to the valve stem 4 and connected to the top surface of the valve core 3. The diameter of the stem head 41 is larger than the diameter of the through hole 11. By providing the stem head 42, when the valve stem 4 is subjected to an outward force, the valve stem 4 moves outward along the through hole 11 until the stem head 41 reaches the through hole 11. Since the diameter of the stem head 41 is larger than the diameter of the through hole 11, the stem head 41 cannot pass through the through hole 11. Therefore, the stem head 41 abuts against the cavity wall of the valve chamber 3 located around the through hole 11, restricting the valve stem 4 from further movement and preventing the valve stem 4 from being accidentally pulled out of the through hole 11.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A PE ball valve, characterized in that, The device includes a valve body (1), which has a valve cavity (2) with open left and right ends. A valve core (3) is installed in the valve cavity (2). Support blocks (5) are provided at both ends of the valve cavity (2). The support blocks (5) abut against the valve core (3). The side of the support block (5) that contacts the valve cavity (2) has a protrusion forming a buckle (51). A slot (21) is provided in the valve cavity (2). The buckle (51) engages with the slot (21).

2. The PE ball valve according to claim 1, characterized in that, The support block (5) has a ring structure. The inner circumferential surface of the support block (5) facing the valve core (3) is provided with an inwardly recessed arc surface (55). The buckle (51) is provided on the outer circumferential surface of the support block (5) at one end close to the valve core (3). The support block (5) is vertically installed in the valve cavity (2).

3. A PE ball valve according to claim 2, characterized in that, The inner ring surface of the annular structure is provided with an installation groove (53), and a sealing ring (54) is provided in the installation groove (53), and the sealing ring (54) abuts against the surface of the valve core (3).

4. A PE ball valve according to claim 1, characterized in that, The buckle (51) is a triangular structure with a cross-section whose height increases in the direction away from the valve core (3).

5. A PE ball valve according to claim 1, characterized in that, At least two buckles (51) are provided, and the two buckles (51) are arranged along the axial direction of the support block (5).

6. A PE ball valve according to claim 1, characterized in that, The side wall of the slot (21) located at the innermost side of the valve cavity (2) facing the inside of the valve cavity (2) is higher than the side wall of the other side. The side wall of the slot (21) on the higher side forms a positioning step (22), which abuts against the support block (5).

7. A PE ball valve according to claim 1, characterized in that, A U-shaped groove (52) is provided on the end face of the support block (5) near the valve core (3).

8. A PE ball valve according to claim 7, characterized in that, Multiple U-shaped grooves (52) are provided, and the multiple U-shaped grooves (52) are evenly arranged on the support block (5) along the circumferential direction.

9. A PE ball valve according to claim 1, characterized in that, The valve body (1) has a through hole (11) on its upper surface that communicates with the valve cavity (2). A valve stem (4) is inserted into the through hole (11), and the valve stem (4) is connected to the valve core (3).

10. A PE ball valve according to claim 9, characterized in that, The valve stem (4) is inserted into the valve body (1) at one end and has a rod head (41). The rod head (41) is fixedly connected to the valve stem (4) and is connected to the top surface of the valve core (3). The diameter of the rod head (41) is larger than the diameter of the through hole (11).

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