3pc high platform ball valve

Abstract

This utility model provides a 3PC high-platform ball valve, belonging to the field of ball valve technology, to solve the problem that in existing 3PC high-platform ball valves, the silicone seal and silicone valve seat are easily damaged by heat and ignition, and the ball is prone to eccentric displacement under the action of residual system pressure or media scouring force during fire conditions. The invention includes a valve body, first positioning holes, a right-angle positioning component, an anti-over-positioning component, and a fireproof component. Multiple first positioning holes are distributed inside the positioning cover; the right-angle positioning component is fixedly connected below the operating handle; the anti-over-positioning component is located above the positioning cover; and the fireproof component is located inside the valve body. This utility model achieves locking and rotation angle limitation of the operating handle to avoid accidental contact and over-opening, while utilizing a metal sealing bushing to maintain the ball's sealing performance during a fire to reduce the risk of media leakage, comprehensively improving the valve's operational safety and adaptability to extreme conditions.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve technology, and more specifically, relates to the 3PC high-platform ball valve. Background Technology

[0002] The 3PC high-platform ball valve is a valve with a three-piece structure. The mounting platform at the top of its stem is higher than that of a regular ball valve, eliminating the need for additional supports. This allows for a more compact connection between the valve and the actuator, making it widely used in various industrial pipeline systems. Existing 3PC high-platform ball valves generally consist of a valve body, a ball, a valve cover, and an operating handle.

[0003] Existing application number: CN202422101311.9, discloses a ball valve, including a valve body comprising a first pipe and a second pipe connected to each other. The first pipe has a first wrench section for screwing, the first wrench section including a first wrench portion, the outer wall of the first wrench portion forming a first wrench surface; the second pipe has a second wrench section for screwing, the second wrench section including a second wrench portion, the outer wall of the second wrench portion forming a second wrench surface; the inner wall of the first wrench portion forms a first fitting surface corresponding to the first wrench surface, the first fitting surface having the same shape as the first wrench surface; the inner wall of the second wrench portion forms a second fitting surface corresponding to the second wrench surface, the second fitting surface having the same shape as the second wrench surface. The valve body of this utility model includes a first pipe and a second pipe, both of which can be manufactured using a water-expansion process, resulting in a shorter production cycle, lower production costs, and a corresponding ball valve with high structural reliability.

[0004] Based on the above, in fire conditions, the silicone sealing seat used in the 3PC high-platform ball valve is prone to ignition and pyrolysis due to the low ignition point of the material. After the silicone valve seat is damaged, the radial constraint and axial seal between the ball and the valve body are destroyed. Under the action of residual system pressure or media scouring force, the ball is prone to eccentric displacement, which causes the gap between the silicone valve seat sealing surface and the ball to increase sharply, ultimately causing the media to leak unexpectedly through the gap. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a 3PC high-platform ball valve. This addresses the issue that, in fire conditions, the silicone sealing seat used in existing 3PC high-platform ball valves is prone to ignition and pyrolysis due to its low ignition point. When the silicone seat is damaged, the radial constraint and axial seal between the ball and valve body are compromised. Under residual system pressure or media scouring force, the ball is prone to eccentric displacement, causing a sharp increase in the clearance between the silicone seat sealing surface and the ball, ultimately leading to unexpected leakage of the media through this gap.

[0006] The purpose and effect of this 3PC high-platform ball valve are achieved by the following specific technical means: A 3PC high-platform ball valve includes a valve body, a positioning cover, first positioning holes, an operating handle, a right-angle positioning component, a limit box, an anti-overrun component, and a fireproof component. The positioning cover is fixedly connected to the top of the valve body. Multiple first positioning holes are provided, and the multiple first positioning holes are distributed inside the positioning cover. The operating handle is rotatably connected to the top of the valve body. The right-angle positioning component is fixedly connected to the bottom of the operating handle. The limit box is fixedly connected to the top of the operating handle. The anti-overrun component is disposed above the positioning cover. The fireproof component is disposed inside the valve body.

[0007] Furthermore, the anti-overrun component includes: a limiting groove; the limiting groove is opened inside the positioning cover, and a right-angle positioning element is disposed inside the limiting groove.

[0008] Furthermore, the anti-overrun component also includes: a sliding plate and an operating component; the sliding plate is slidably connected inside the limiting box; the operating component is fixedly connected above the sliding plate, and the operating component is slidably connected to the top of the limiting box.

[0009] Furthermore, the anti-overrun component also includes: a positioning post and a second positioning hole; the positioning post is fixedly connected to the bottom of the sliding plate; the second positioning hole is opened inside the rear of the operating handle, and the positioning post is inserted into the second positioning hole.

[0010] Furthermore, the anti-overrun component also includes a reset spring; the bottom of the reset spring is fixedly connected to the top of the sliding plate, and the top of the reset spring is fixedly connected to the inside of the limit box.

[0011] Furthermore, the fireproof component includes: a metal sealing bushing and a silicone valve seat; the metal sealing bushing is fixedly connected inside the valve body; and the silicone valve seat is fixedly connected inside the metal sealing bushing.

[0012] Compared with the prior art, the present invention has the following beneficial effects: First, the positioning post, in conjunction with the first and second positioning holes, locks the position of the operating handle, preventing accidental movement and reducing safety accidents and economic losses. The right-angle positioning component, in conjunction with the limiting groove, restricts the operating handle to only be turned 90 degrees, preventing excessive opening from affecting the performance.

[0013] Secondly, by installing a metal sealing bushing inside the valve body, even after the silicone valve seat is damaged by heat in a fire, the metal sealing bushing can still hold the ball in place, preventing the ball from shifting far away due to residual system pressure or media scouring force. This helps to maintain the sealing performance between the valve sealing surface and the ball as much as possible, reducing the risk of unexpected media leakage.

[0014] This invention uses an anti-overrun component to lock the operating handle and limit its rotation angle to prevent accidental contact and over-opening. At the same time, it uses a metal sealing bushing to maintain the ball's sealing performance during a fire to reduce the risk of media leakage. This comprehensively improves the valve's operational safety and adaptability to extreme working conditions, and better meets the stringent hygiene and safety requirements of various fields. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the positioning cover structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the operating handle structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting box of this utility model.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the valve body of this utility model.

[0020] Figure 6 This is a schematic diagram of the metal sealing bushing structure of this utility model.

[0021] Figure 7 This is the utility model Figure 5 A detailed, enlarged structural diagram of point A in the middle.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Valve body; 2. Positioning cover; 201. Limiting groove; 202. First positioning hole; 3. Operating handle; 301. Second positioning hole; 4. Right-angle positioning component; 5. Limiting box; 6. Sliding plate; 601. Operating component; 602. Positioning column; 7. Return spring; 8. Metal sealing bushing; 9. Silicone valve seat. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] Example 1: As attached Figure 1 To be continued Figure 7 As shown: This utility model provides a 3PC high-platform ball valve, including a valve body 1, a positioning cover 2, a first positioning hole 202, an operating handle 3, a right-angle positioning component 4, a limit box 5, and an anti-overrun component; the positioning cover 2 is fixedly connected to the top of the valve body 1; multiple first positioning holes 202 are provided, and the multiple first positioning holes 202 are distributed inside the positioning cover 2; the operating handle 3 is rotatably connected to the top of the valve body 1; the right-angle positioning component 4 is fixedly connected to the bottom of the operating handle 3; the limit box 5 is fixedly connected to the top of the operating handle 3; and the anti-overrun component is disposed on the top of the positioning cover 2.

[0025] The anti-overrun component includes: a limiting slot 201; the limiting slot 201 is opened inside the positioning cover 2, and the right-angle positioning component 4 is set inside the limiting slot 201.

[0026] The anti-overrun component also includes: a sliding plate 6 and an operating component 601; the sliding plate 6 is slidably connected inside the limit box 5; the operating component 601 is fixedly connected above the sliding plate 6 and is slidably connected to the top of the limit box 5.

[0027] The anti-overrun component also includes: a positioning post 602 and a second positioning hole 301; the positioning post 602 is fixedly connected to the bottom of the sliding plate 6; the second positioning hole 301 is opened inside the rear of the operating handle 3, and the positioning post 602 is inserted into the second positioning hole 301.

[0028] The anti-overrun component also includes a reset spring 7; the bottom of the reset spring 7 is fixedly connected to the top of the sliding plate 6, and the top of the reset spring 7 is fixedly connected to the inside of the limit box 5.

[0029] The specific usage and function of this embodiment are as follows: During use, the positioning pin 602 passes through the inside of the second positioning hole 301 and the first positioning hole 202, thereby locking the position of the operating handle 3. This prevents pedestrians from snagging their clothes on the operating handle 3 or accidentally touching it, which could lead to safety accidents and economic losses. When it is necessary to move the operating handle 3, pull the operating component 601 upwards, causing the sliding plate 6 and the positioning pin 602 to move upwards. After the positioning pin 602 disengages from the current first positioning hole 202, the operating handle 3 can be moved to the left. With the cooperation of the right-angle positioning component 4 and the limiting groove 201, the operating handle 3 can only be moved 90 degrees, preventing the operating handle 3 from opening too wide. After moving into position, release the operating component 601. Under the rebound action of the return spring 7, the sliding plate 6 and the positioning pin 602 move downwards, and the positioning pin 602 inserts into the second positioning hole 301 and the first positioning hole 202 at the lower right, thus locking the position of the operating handle 3 again.

[0030] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 7 As shown, it also includes a fireproof component, which is installed inside the valve body 1.

[0031] The fireproof components include: a metal sealing bushing 8 and a silicone valve seat 9; the metal sealing bushing 8 is fixedly connected inside the valve body 1; and the silicone valve seat 9 is fixedly connected inside the metal sealing bushing 8.

[0032] The specific usage and function of this embodiment: The inner end face of the silicone valve seat 9 is in contact with the ball, and the inner end face of the metal sealing bushing 8 is located at the bottom of the inner side of the silicone valve seat 9, also in contact with the ball. In the event of a fire, the silicone valve seat 9 is ignited by heat and undergoes pyrolysis and carbonization. At this time, the metal sealing bushing 8 can still tightly hold the ball in place. The metal sealing bushing 8 and the ball form a metal-to-metal sealing pair, which can maintain the seal even after the silicone valve seat 9 is damaged. At the same time, it prevents the ball from being displaced far away after being impacted, and ensures the sealing performance of the valve sealing surface and the ball as much as possible.

[0033] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0034] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0035] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A 3PC high platform ball valve characterized by: The valve body includes a valve body (1), a positioning cover (2), a first positioning hole (202), an operating handle (3), a right-angle positioning component (4), a limit box (5), an anti-overrun component, and a fireproof component. The positioning cover (2) is fixedly connected to the top of the valve body (1). Multiple first positioning holes (202) are provided, and the multiple first positioning holes (202) are dispersedly provided inside the positioning cover (2). The operating handle (3) is rotatably connected to the top of the valve body (1). The right-angle positioning component (4) is fixedly connected to the bottom of the operating handle (3). The limit box (5) is fixedly connected to the top of the operating handle (3). The anti-overrun component is provided above the positioning cover (2). The fireproof component is provided inside the valve body (1).

2. The 3PC high platform ball valve as claimed in claim 1, characterized in that: The anti-overrun component includes: a limiting slot (201); the limiting slot (201) is opened inside the positioning cover (2), and a right-angle positioning component (4) is set inside the limiting slot (201).

3. The 3PC high-raised ball valve according to claim 1, characterized in that: The anti-overrun component also includes: a sliding plate (6) and an operating component (601); the sliding plate (6) is slidably connected inside the limiting box (5); the operating component (601) is fixedly connected above the sliding plate (6), and the operating component (601) is slidably connected to the top of the limiting box (5).

4. The 3PC high platform ball valve as claimed in claim 1, characterized in that: The anti-overrun component also includes: a positioning post (602) and a second positioning hole (301); the positioning post (602) is fixedly connected to the bottom of the sliding plate (6); the second positioning hole (301) is opened inside the rear of the operating handle (3), and the positioning post (602) is inserted into the second positioning hole (301).

5. The 3PC high platform ball valve as claimed in claim 1, wherein: The anti-overrun component also includes a reset spring (7); the bottom of the reset spring (7) is fixedly connected to the top of the sliding plate (6), and the top of the reset spring (7) is fixedly connected to the inside of the limit box (5).

6. The 3PC high platform ball valve as claimed in claim 1, characterized in that: The fireproof component includes a metal sealing bushing (8) and a silicone valve seat (9); the metal sealing bushing (8) is fixedly connected inside the valve body (1); the silicone valve seat (9) is fixedly connected inside the metal sealing bushing (8).

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