Plastic-coated ball valve integrally formed through secondary injection molding
Through the injection molding integrated plastic-encapsulated ball valve technology, the existing ball valve installation difficulties, water leakage and flow restriction are solved, and efficient and well-sealed ball valve production is achieved, reducing production costs.
Patent Information
- Application Number
- CN202421432312.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-21
AI Technical Summary
During the installation process, existing ball valves have problems such as poor installation of the valve ball, high labor intensity, easy leakage, and limited flow, resulting in low production efficiency and high cost.
The plastic-encapsulated ball valve is adopted with injection molding, and the valve stem and valve ball installation process is simplified by adding the valve ball sleeve body, cover and sealing ring to the valve ball sleeve, and combining the valve ball sleeve with the valve body through injection molding integrated molding technology.
It realizes convenient installation of valve stem and valve ball, greatly improves production efficiency, reduces labor intensity, ensures sealing performance, avoids water leakage, and can increase the flow rate of valve balls according to demand without increasing the overall size, reducing production costs.
Smart Images
Figure CN222650607U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ball valve production, in particular to a plastic-coated ball valve integrally formed by secondary injection molding. Background Art
[0002] As people's living standards continue to improve, higher requirements are placed on product quality. At present, the ball valves on the market are all produced by first producing the plastic ball valve body, and then manually installing the sealing ring, valve stem and valve ball. This method makes the valve ball difficult to install, the labor intensity is high, and it is easy to cause the ball valve to leak due to improper installation. Another very important point is that this installation method causes the size of the valve ball to not be too large, otherwise the valve ball cannot be installed at all, which will result in the flow of the ball valve being limited. Once the flow of the ball valve is to be increased, the overall size must be increased. This method will greatly increase the production cost of the ball valve, which is not a good solution. Summary of the invention
[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides an injection-molded plastic-coated ball valve, which has a simple structure and is easy to install the valve stem and valve ball, greatly improving production efficiency and reducing labor intensity. At the same time, it has good sealing performance and eliminates water leakage of the valve stem and valve core.
[0004] The technical solution adopted to achieve the above-mentioned purpose of the utility model is:
[0005] An injection molded plastic-coated ball valve comprises a valve stem, a valve ball and a valve body. The valve ball has two coaxial connecting holes and a valve ball sleeve for wrapping the valve ball. The valve ball sleeve comprises a valve ball sleeve body, a cover body and a sealing ring. The valve ball sleeve body and the cover body are made of plastic. An accommodating cavity for accommodating the valve ball is provided in the valve ball sleeve body. A first through hole is provided at one end of the valve ball sleeve body, and a second through hole matched with the cover body is provided at the other end of the valve ball sleeve body. The first through hole and the second through hole are respectively connected to the accommodating cavity. The valve ball is located in the accommodating cavity. In the cavity, the sealing ring is installed on the cover body, the cover body sealing cover is closed on the second through hole, a third through hole is provided in the center of the cover body, the first through hole and the third through hole are respectively connected with the two communicating holes of the valve ball, a mounting port for installing the valve stem is provided on the valve ball sleeve body, the axis of the mounting hole is perpendicular to the axis of the valve ball sleeve body, the valve stem passes through the mounting port, and the valve stem and the mounting port are interference fit, one end of the valve stem located in the valve ball sleeve is fixedly connected to the valve ball, the valve body is made of plastic, and the valve body and the valve ball sleeve are integrally formed by injection molding.
[0006] The cover body is provided with a groove for installing a sealing ring, the groove is annular, the diameter of the groove is larger than the diameter of the third through hole, the sealing ring is annular, and the sealing ring is located in the groove.
[0007] The sealing ring is provided with a truncated cone-shaped assembly cavity, which is located inside the sealing ring. The diameter of the assembly cavity decreases from inside to outside. One end of the valve ball is located in the assembly cavity, and the valve ball is sealed and connected to the sealing ring.
[0008] The first through hole, the second through hole and the third through hole are all circular holes, the diameter of the second through hole is larger than the diameter of the first through hole, and the diameter of the first through hole is the same as the diameter of the third through hole.
[0009] The outer wall of the valve ball sleeve body is provided with a plurality of convex ribs distributed at equal intervals along its axial direction, wherein the outermost convex ribs located at both ends of the outer wall of the valve ball sleeve body are annular, the convex rib located between the two outermost convex ribs are arc-shaped, and the two ends of each convex rib located between the two outermost convex ribs are respectively connected to the installation port.
[0010] Compared with the prior art, the beneficial effects and advantages of the utility model are:
[0011] 1. The ball valve has a plastic ball sleeve. During production, the valve stem, valve ball and valve sleeve can be assembled together first, and then the valve sleeve and valve body can be injection molded into one piece. This makes the installation of the valve stem and valve ball easier, greatly reduces labor intensity and improves the production efficiency of the ball valve.
[0012] 2. The ball valve has a plastic ball sleeve. During production, the valve stem, valve ball and valve ball sleeve can be assembled together first. Since the valve stem, valve ball and valve ball sleeve are assembled in place and the valve ball sleeve and valve body are integrally formed, the sealing effect is good, which prevents the occurrence of water leakage from the valve stem and valve core.
[0013] 3. The ball sleeve and valve body of the ball valve are integrally formed by injection molding, which further increases the mechanical strength of the ball valve.
[0014] 4. The ball valve has a plastic ball sleeve. If you want to increase the flow of the ball valve, you need to increase the size of the valve ball. In this case, you only need to increase the size of the ball sleeve, which solves the problem of significantly increasing costs due to increasing the overall size. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the external structure of an injection molded one-piece plastic-coated ball valve.
[0016] Figure 2 This is a schematic diagram of the internal structure of an injection molded plastic-coated ball valve.
[0017] Figure 3 This is the assembly drawing of the valve ball sleeve, valve ball and valve stem.
[0018] Figure 4 This is an exploded view of the valve ball sleeve.
[0019] Among them, 1-valve stem, 2-valve ball, 3-valve body, 4-valve ball sleeve body, 5-first through hole, 6-second through hole, 7-installation port, 8-cover body, 9-third through hole, 10-groove, 11-sealing ring, 12-assembly cavity, 13-convex rib. DETAILED DESCRIPTION
[0020] The utility model is described in detail below in conjunction with the accompanying drawings.
[0021] The structure of the plastic-coated ball valve provided in this embodiment is as follows: Figure 1 and Figure 2 As shown, it includes a valve stem 1, a valve ball 2, a valve body 3 and a valve ball sleeve. The valve body 3 is made of plastic, such as PVC, PP, etc.
[0022] like Figure 4 As shown, the valve ball sleeve includes a valve ball sleeve body 4, a cover body 5 and a sealing ring 6. The sealing ring is made of EPDM rubber, and the valve ball sleeve body 4 and the cover body 5 are made of plastic, such as PVC and PP. The shape of the valve ball sleeve and the valve sleeve body 4 is the same as that of the valve ball 2, but there are differences in size. A receiving cavity for receiving the valve ball is provided in the valve ball sleeve body 4, a first through hole 5 is provided at one end of the valve ball sleeve body 4, and a second through hole 6 matching with the cover body is provided at the other end of the valve ball sleeve body 4. Both the first through hole 5 and the second through hole 6 are circular holes, and the diameter of the second through hole 6 is larger than the diameter of the first through hole 5. The first through hole 5 and the second through hole 6 are the same as the axis of the valve ball sleeve and the receiving cavity, and the first through hole 5 and the second through hole 6 are respectively connected to the receiving cavity. A mounting hole 7 for mounting the valve stem is provided on the valve ball sleeve body 4, and the axis of the mounting hole is perpendicular to the axis of the valve ball sleeve body.
[0023] like Figure 4 As shown, the cover body 8 is circular, and a third through hole 9 is provided in the center of the cover body 8. The third through hole 9 is coaxial with the cover body 8, and the diameter of the third through hole 9 is the same as the diameter of the first through hole 5. A groove 10 for installing a sealing ring is provided in the cover body 8, and the axis of the groove 10 is the same as that of the cover body 8. The groove 10 is annular, and the diameter of the groove 10 is larger than the diameter of the third through hole 9.
[0024] like Figure 4 As shown, the sealing ring 11 is annular, and a truncated cone-shaped assembly cavity 12 is provided on one side of the sealing ring 11 .
[0025] The valve stem 1 passes through the mounting opening 7, and the valve stem 1 and the mounting opening 7 are interference fit. The valve ball 2 is located in the accommodating cavity, and one end of the valve stem 1 located in the valve ball sleeve is fixedly connected to the valve ball 2. The sealing ring 11 is installed in the groove 10, and the cover body 8 is sealed and covered on the second through hole 6. The assembly cavity 12 is located on the side of the sealing ring 11 facing the valve ball 2, and the diameter of the end of the assembly cavity 12 facing the valve ball 2 is larger than the diameter of the end of the assembly cavity 12 facing away from the valve ball 2. One end of the valve ball 2 is located in the assembly cavity 12, and the valve ball 2 is sealed and connected to the sealing ring 11. The first through hole and the third through hole are respectively connected to the two connecting holes of the valve ball.
[0026] The outer wall of the valve ball sleeve body 4 is provided with five convex ribs 13 distributed at equal intervals along its axial direction, wherein the outermost convex ribs 13 located at both ends of the outer wall of the valve ball sleeve body 4 are annular, and the three convex ribs 13 located between the two outermost convex ribs 13 are all arc-shaped, and the two ends of each convex rib 13 located between the two outermost convex ribs are respectively connected to the mounting port 7. The valve ball sleeve and the valve body 3 are integrally formed by mold injection molding, and the convex ribs 13 are added to the outer wall of the valve ball sleeve body 4. During injection molding, the valve ball sleeve and the valve body 3 are more closely connected, so that the strength and sealing of the integrally formed ball valve are better, and water seepage between the valve body and the valve ball sleeve can be better prevented.
[0027] When producing the ball valve, the three components of the valve ball sleeve, the valve ball sleeve body 4, the cover body 8 and the sealing ring 11, are first produced by injection molding. Then the valve stem 1 is first installed through the second through hole 6 and the installation port 7, and the valve ball 2 is installed after the valve stem 1 is installed. Then the sealing ring 11 is placed in the cover body 8, and then the cover body 8 is covered on the second through hole 6, so that the assembly consisting of the valve ball sleeve, the valve stem 1 and the valve ball 2 is assembled. Figure 3 As shown, the assembly consisting of the valve ball sleeve, the valve stem 1 and the valve ball 2 is placed in a mold for injection molding of the valve body. After the injection molding is completed, the valve body 3 and the valve ball sleeve are formed into an integrated structure through injection molding.
Claims
1. An injection molded plastic-coated ball valve, comprising a valve stem, a valve ball and a valve body, wherein the valve ball has two coaxial connecting holes, characterized in that: The closure body is provided with a first through hole, and the second through hole is provided with a second through hole, the first through hole and the second through hole are connected with the accommodating cavity respectively, and the valve ball is located in the accommodating cavity. The sealing ring is installed on the cover body, and the cover body seals on the second through hole. A third through hole is provided in the center of the cover body, and the first through hole and the third through hole are connected with the two communicating holes of the valve ball respectively. The valve ball sleeve body is provided with a mounting port for mounting a valve stem, and the axis of the mounting hole is perpendicular to the axis of the valve ball sleeve body. The valve stem passes through the mounting port, and the valve stem and the mounting port are interference fit. One end of the valve stem located in the valve ball sleeve is fixedly connected to the valve ball. The valve body is made of plastic, and the valve body and the valve ball sleeve are integrally formed by injection molding.
2. The plastic-coated ball valve formed by one-piece injection molding according to claim 1, characterized in that: The cover body is provided with a groove for installing a sealing ring, the groove is annular, the diameter of the groove is larger than the diameter of the third through hole, the sealing ring is annular, and the sealing ring is located in the groove.
3. The plastic-coated ball valve formed by injection molding according to claim 2, characterized in that: The sealing ring is provided with a truncated cone-shaped assembly cavity, which is located inside the sealing ring. The diameter of the assembly cavity decreases from inside to outside. One end of the valve ball is located in the assembly cavity, and the valve ball is sealed and connected to the sealing ring.
4. The plastic-coated ball valve formed by one-piece injection molding according to claim 1, characterized in that: The first through hole, the second through hole and the third through hole are all circular holes, the diameter of the second through hole is larger than the diameter of the first through hole, and the diameter of the first through hole is the same as the diameter of the third through hole.
5. The plastic-coated ball valve formed by injection molding according to claim 1, characterized in that: The outer wall of the valve ball sleeve body is provided with a plurality of convex ribs distributed at equal intervals along its axial direction, wherein the outermost convex ribs located at both ends of the outer wall of the valve ball sleeve body are annular, the convex rib located between the two outermost convex ribs are arc-shaped, and the two ends of each convex rib located between the two outermost convex ribs are respectively connected to the installation port.