High-sealing-performance ball valve

Abstract

The ball valve comprises a valve body, a ball valve body, a valve rod, a left end cover, a right end cover and a valve cover, the left end cover and the right end cover are installed at the two ends of the valve body to form an inlet and an outlet, the valve cover is installed at the upper end of the valve body, the valve rod is installed in the valve body and used for opening or closing a valve body channel, the valve rod is installed in the valve cover, and the upper end of the valve rod extends out of the valve cover. The ball valve is characterized in that the valve body is provided with a first inner step and a second inner step in the direction facing the left end cover and / or the right end cover, the diameter of the first inner step is larger than that of the second inner step, a step structure is formed, and the valve body, the left end cover and the right end cover are provided with sealing seats in a paper piece mode. A sealing seat outer ring and a sealing seat inner ring are formed on the sealing seat, the sealing seat is provided with a sealing face facing the end face of the ball valve and making contact with the end face of the ball valve, and the back face of the sealing seat is attached to the inner wall of the left end cover and the inner wall of the right end cover. According to the scheme, the advantages of being excellent in sealing performance and convenient to maintain are achieved.

Description

Technical Field

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

[0002] In the field of fluid control, as an important type of valve, ball valves are widely used in various industrial pipeline systems to achieve functions such as opening, closing, and flow regulation of fluids. Traditional ball valves usually consist of main components such as valve bodies, spheres (ball valves), valve stems, and end caps. Its working principle is to drive the sphere to rotate by rotating the valve stem, and control the flow of fluids by aligning or misaligning the through holes on the sphere with the pipeline.

[0003] However, there are some deficiencies in the sealing performance of ball valves in the prior art. For example, the connection between the valve body and the end cap, the mating part between the valve stem and the valve cover, etc. are often high-risk areas for fluid leakage. Such leakage not only causes waste of fluids, but may also lead to environmental pollution, equipment failures, and even safety accidents, especially in the occasions of transporting high-temperature, high-pressure, toxic, or corrosive fluids. In addition, the sealing structure of traditional ball valves is relatively simple and difficult to meet the requirements of high-precision sealing. Especially during long-term use, the sealing elements are prone to failure due to factors such as wear and aging.

[0004] In view of the above deficiencies, an improvement is proposed in this solution. Summary of the Utility Model

[0005] A ball valve with high sealing performance proposed by the utility model significantly improves the sealing performance and reliability of the ball valve by optimizing the structural design of key components such as the valve body, sealing seat, and valve stem, and adopting multiple sealing measures. It can effectively solve the sealing problems existing in the prior art and meet the requirements of modern industry for high sealing performance and high reliability of fluid control equipment, and solve the above problems existing in the prior art during use.

[0006] The technical solution of the utility model is realized as follows:

[0007] In order to achieve the above object, the utility model adopts the following technical solutions:

[0008] A highly sealed ball valve, comprising a valve body, a ball valve, a valve stem, a left end cover, a right end cover and a valve cover. The left end cover and the right end cover are installed at both ends of the valve body to form an inlet and an outlet. The valve cover is installed at the upper end of the valve body. The valve stem is installed inside the valve body to open or close the valve body passage. The valve stem is installed inside the valve cover, and its upper end extends outside the valve cover as a starting end. Its lower end is installed on the ball valve and fixedly connected. It is characterized in that: the valve body is provided with a first inner step and a second inner step in the direction towards the left end cover and / or the right end cover. The diameter of the first inner step is larger than that of the second inner step, forming a stepped structure. A sealing seat is installed between the valve body and the left end cover and the right end cover. The sealing seat is formed with a sealing seat outer ring installed on the first inner step and a sealing seat inner ring installed on the second inner step. The sealing seat has a sealing surface facing and contacting the end face of the ball valve. The back of the sealing seat is attached to the inner walls of the left end cover and the right end cover.

[0009] As can be seen from the above solution, a sealing seat is installed between the valve body and the left end cover and the right end cover. The sealing seat is divided into a sealing seat outer ring and a sealing seat inner ring, which are respectively installed on the first inner step and the second inner step of the valve body. This structure enables a tight fit to be formed between the sealing seat, the valve body and the end cover. The sealing surface directly contacts the end face of the ball valve, which can effectively prevent fluid leakage.

[0010] Preferably, the valve cover is machined to form a valve cover inner ring. A valve stem inner step is machined on the lower end of the valve stem in the valve cover inner ring. A valve stem inner sealing gasket is installed between the valve stem inner step and the valve cover inner ring.

[0011] As can be seen from the above solution, this multi-layer sealing structure can effectively prevent fluid from leaking through the gap between the valve stem and the valve cover, further improving the sealing performance of the ball valve.

[0012] Preferably, the valve stem has an inner concave ring on the valve cover inner ring, and a sealing ring is embedded in the inner concave ring.

[0013] Preferably, the left end cover and the right end cover are fixedly connected to the valve body through fasteners.

[0014] As can be seen from the above solution, this connection method can ensure a tight fit between the end cover and the valve body, prevent loosening caused by pressure fluctuations or mechanical vibrations, and thus ensure the sealing performance and stability of the ball valve.

[0015] Preferably, the inner channel of the left end cover is machined with an internal thread, and a left through pipe is adaptively installed on the internal thread. The inner end of the left through pipe extends to the connection between the valve body and the left end cover and contacts the end face of the inner ring side extending on the sealing seat.

[0016] Preferably, the inner channel of the right end cover is machined with an internal thread, and a right through pipe is adaptively installed on the internal thread. The inner end of the right through pipe extends to the connection between the valve body and the right end cover and contacts the end face of the inner ring side extending on the sealing seat.

[0017] As can be seen from the above solution, internal threads are respectively machined on the internal channels of the left end cap and the right end cap, and a left through pipe and a right through pipe are adaptively installed. The inner ends of the through pipes extend to the connection between the valve body and the end cap and contact the end face of the inner ring side extending on the sealing seat. This design can not only further enhance the sealing effect, but also achieve compensation for its sealing and extend the service life of the ball valve.

[0018] Compared with the prior art, the utility model has the following beneficial effects: The high-sealing ball valve of this solution realizes excellent sealing performance and easy maintenance by optimizing the designs of the valve body, the sealing seat, and the valve stem. It is applicable to various industrial occasions, can effectively prevent fluid leakage, and improve production efficiency and equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 FIG. 1 is an overall view of a high-sealing ball valve according to a specific embodiment of the present utility model;

[0021] Figure 2 For the present utility model Figure 1 FIG. 2 is a schematic diagram of a partially enlarged structure at position A in the present utility model;

[0022] Figure 3 FIG. 3 is a schematic top view structure of a high-sealing ball valve of the present utility model;

[0023] Figure 4 FIG. 4 is a schematic semi-sectional structure diagram of a high-sealing ball valve installed with a handle;

[0024] Figure 5 FIG. 5 is a schematic diagram of the sealing seat;

[0025] Figure 6 FIG. 6 is a schematic structure diagram of Embodiment 2;

[0026] Figure 7 For Figure 6 FIG. 7 is a schematic structure diagram of the left through pipe in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will combine the drawings in the embodiments of the present utility model Figures 1-7, the technical solutions in the embodiments of the present utility model are described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0028] Embodiment 1

[0029] As Figures 1 to 7 shown, this embodiment discloses a high-sealing ball valve, which includes a valve body 4, a ball valve 3, a valve stem 12, a left end cover 1, a right end cover, and a valve cover 7. The left end cover 1 and the right end cover are installed at both ends of the valve body 4 to form an inlet and an outlet. This design enables the fluid to enter the interior of the valve body from the inlet and flow out from the outlet after being controlled by the ball valve, thereby realizing the functions of fluid transportation and control. The left end cover 1 and the right end cover are fixedly connected to the valve body 4 through fasteners (such as bolts). This connection method can ensure the firm and reliable connection between the end cover and the valve body, prevent the end cover from loosening due to pressure changes or vibrations, and thus ensure the overall sealing performance and stability of the ball valve.

[0030] The valve cover is installed at the upper end of the valve body. The valve stem is installed in the valve body to open or close the valve body passage. The valve stem is installed in the valve cover, and its upper end extends out of the valve cover as a starting end and is connected to the handle 15 through a nut 13 and a gasket 14, enabling the operator to easily control the working state of the ball valve through the valve stem. A packing 10 and a packing gland 11 are installed between the valve cover and the valve stem, and its lower end is fixedly connected to the ball valve 3. The valve body 4 is provided with a first inner step 71 and a second inner step 72 in the direction of the left end cover 1 and / or the right end cover. This stepped structure provides an accurate installation position for the sealing seat 2, ensuring that the sealing seat can be firmly installed in the valve body and closely cooperate with the inner wall of the valve body to prevent fluid leakage. The diameter of the first inner step 71 is larger than that of the second inner step 72, forming a stepped structure. A sealing seat 2 is installed between the valve body and the left end cover and the right end cover. The sealing seat 2 is formed with a sealing seat outer ring 21 installed on the first inner step and a sealing seat inner ring 22 installed on the second inner step. The sealing seat has a sealing surface 23 facing and contacting the end face of the ball valve. The back of the sealing seat is attached to the inner walls of the left end cover and the right end cover. Its sealing seat outer ring 21 is installed on the first inner step 71, and the sealing seat inner ring 22 is installed on the second inner step 72. This split design enables the sealing seat to better adapt to the stepped structure of the valve body and ensures the sealing performance between the sealing seat and the valve body. The sealing surface 23 is in close contact with the surface of the ball valve 3, which can effectively prevent fluid from leaking from the gap between the ball valve and the sealing seat. This design of the sealing surface is one of the keys to achieving the high sealing performance of the ball valve.

[0031] The back of the sealing seat 2 is attached to the inner walls of the left end cover and the right end cover. This design further enhances the stability of the sealing seat, enabling it to withstand the pressure of the fluid during operation and preventing fluid leakage from the gap between the sealing seat and the end cover.

[0032] The valve cover 7 is machined to form an inner ring of the valve cover. The valve stem 12 is machined with an inner step of the valve stem at the lower end of the inner ring of the valve cover. A valve stem inner gasket is installed between the inner step of the valve stem and the inner ring of the valve cover. The valve stem inner gasket can effectively prevent fluid from leaking from the gap between the valve stem and the valve cover, improving the sealing performance of the ball valve.

[0033] The described valve cover is machined to form an inner ring 73 of the valve cover. The valve stem is machined with an inner step 121 of the valve stem at the lower end of the inner ring of the valve cover. A valve stem inner gasket 8 is installed between the inner step of the valve stem and the inner ring of the valve cover.

[0034] The valve stem 12 has a concave ring on the inner ring of the valve cover, and a sealing ring 9 is embedded in the concave ring. The sealing ring 9 further enhances the sealing performance between the valve stem and the valve cover, preventing fluid leakage. This double-sealing design can effectively improve the sealing reliability of the ball valve and maintain good sealing performance even under high-pressure or highly corrosive fluid conditions.

[0035] Preferably, the left end cover, the right end cover and the valve body are fixedly connected by fasteners. The fasteners include a screw 5, nuts 5a, and gaskets 6, 6a.

[0036] Embodiment 2

[0037] This embodiment is improved on the basis of Embodiment 1. The main purpose is to prevent leakage of the seal due to the rotation of the valve ball, and the purpose is to adjust its flow rate according to requirements at any time. The specific scheme is as follows:

[0038] The inner channel of the left end cover is machined with an internal thread, and a left through pipe 13 is fitted and installed on the internal thread. The inner end 131 of the left through pipe extends to the connection between the valve body and the left end cover and contacts the extended inner ring side end face of the sealing seat. This design enables the left through pipe to communicate with the fluid channel inside the valve body, and further enhances the sealing performance through contact with the sealing seat.

[0039] Specifically, a gasket 14 is installed between the left through pipe and the inner end face of the left end cover. There is a gap 14 between the gasket 14 and the left through pipe, and the outer end face of the left through pipe is machined into a multi-angled structure 132, which is convenient for rotating the left through pipe with tools. The working method is: rotate the left through pipe with tools to make it move inside the left end cover. After moving, the gap between the sealing seat and the outer surface of the ball valve is adjusted, further improving the sealing performance and also improving the long-term use of the product.

[0040] The structure of the right end cover is the same as that of the left end cover. Specifically: an internal thread is machined on the internal channel of the right end cover, and a right through pipe is fitted and installed on the internal thread. The inner end of the right through pipe extends to the connection between the valve body and the right end cover and contacts the inner ring side end face extending on the sealing seat. The function of the right through pipe is similar to that of the left through pipe, which is used to connect the fluid pipeline and ensure the sealing performance by contacting the sealing seat.

[0041] Through the above-mentioned various component and structure designs, this high-sealing ball valve can achieve the following comprehensive effects:

[0042] Through the sealing seat between the valve body and the end cover, the gaskets and sealing rings between the valve stem and the valve cover, and the tight fit between the through pipe and the sealing seat, the ball valve realizes multiple seals at multiple key positions, effectively preventing fluid leakage, and can maintain good sealing performance even under working conditions of high pressure, high temperature or highly corrosive fluids.

[0043] The design of this ball valve can adapt to a variety of working conditions, including different fluid media, pressure ranges and temperature ranges. Its sealing structure and materials can be optimized and selected according to specific working conditions to meet different application requirements.

[0044] In short, through its unique structure design and multiple sealing measures, this high-sealing ball valve can effectively improve the sealing performance and reliability of the ball valve and is applicable to fluid control occasions with high requirements for sealing.

[0045] Figure 5 The dimensions in are taken as an example and are not limited thereto.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-sealing ball valve, comprising a valve body, a ball valve, a valve stem, a left end cover, a right end cover and a valve cover. The left end cover and the right end cover are installed at both ends of the valve body to form an inlet and an outlet. The valve cover is installed on the upper end of the valve body. The valve stem is installed in the valve body to open or close the valve body passage. The valve stem is installed in the valve cover, and its upper end extends out of the valve cover as a starting end. Its lower end is installed on the ball valve and fixedly connected. It is characterized in that: The described valve body is provided with a first inner step and a second inner step in the direction towards the left end cover and / or the right end cover. The diameter of the first inner step is larger than that of the second inner step, forming a stepped structure. A sealing seat is installed between the valve body and the left end cover and the right end cover paper pieces. The sealing seat is formed with a sealing seat outer ring installed on the first inner step and a sealing seat inner ring installed on the second inner step. The sealing seat has a sealing surface facing and contacting the end face of the ball valve, and the back of the sealing seat is attached to the inner walls of the left end cover and the right end cover.

2. The high-sealing ball valve according to claim 1, characterized in that: The described valve cover is machined to form a valve cover inner ring. A valve stem inner step is machined at the lower end of the valve stem within the valve cover inner ring, and a valve stem inner sealing gasket is installed between the valve stem inner step and the valve cover inner ring.

3. The high-sealing ball valve according to claim 2, wherein: The valve stem has an inner concave ring on the valve cover inner ring, and a sealing ring is embedded in the inner concave ring.

4. The high-sealing ball valve according to claim 3, wherein: The left end cover, the right end cover and the valve body are fixedly connected through fasteners.

5. The high-sealing ball valve according to claim 1 or 2 or 3 or 4, characterized in that: Internal threads are machined on the inner channel of the left end cover, and a left through pipe is adaptively installed on the internal threads. The inner end of the left through pipe extends to the connection between the valve body and the left end cover and contacts the inner ring side end face extending on the sealing seat.

6. The high-sealing ball valve according to claim 5, characterized in that: Internal threads are machined on the inner channel of the right end cover, and a right through pipe is adaptively installed on the internal threads. The inner end of the right through pipe extends to the connection between the valve body and the right end cover and contacts the inner ring side end face extending on the sealing seat.

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