Gas three-way valve for hot-rolled strip steel production

Abstract

The utility model discloses a gas three-way valve for hot-rolled strip steel production, which belongs to the technical field of hot-rolled strip steel production and comprises a valve body with three ports and two sets of valve cores positioned inside the valve body. Each set of valve core comprises a valve plate and a driving mechanism for driving the valve plate to act; the sealing structure is characterized in that an annular sealing groove is formed in the butt joint face of the valve plate and the valve port, and an annular fluororubber sealing strip is installed in the sealing groove; wherein the sealing groove is of a trapezoidal structure; the diameter of the opening position of the sealing groove is smaller than that of the bottom of the sealing groove; the inclination angle of the trapezoid structure is 22 degrees. The annular sealing groove is formed in the butt joint face of the valve plate and the valve port, the sealing groove is designed to be of a trapezoidal structure, on one hand, the fluororubber sealing strip can be limited, and on the other hand, the fluororubber sealing strip is prevented from being disengaged from the sealing groove; finally, the sealing performance of the gas three-way valve is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot-rolled strip steel production, in particular to a gas three-way valve used in the hot-rolled strip steel production. Background Art

[0002] In the production process of hot-rolled strip steel, the heating stage of the slab in the heating furnace has a decisive influence on the final rolling quality. In order to ensure that the gas can be fully burned, the gas three-way valve plays a vital role in this process. This valve is mainly used to handle the occasions where the high-temperature flue gas generated after gas combustion passes through the heat storage body. Since the gas temperature is high when passing through, higher requirements are placed on the material and design of the valve.

[0003] Coal gas and flue gas not only contain corrosive chemical components, but also the fine dust particles in the flue gas or coal gas will cause adhesion and friction to the materials of moving parts. In order to cope with these high temperature and corrosive environments, the temperature at the seal is usually kept below 300 degrees Celsius. In this case, using fluororubber as the elastic seal of the sealing strip is an ideal choice because it can provide a good sealing effect.

[0004] However, in actual applications, it is found that the fluororubber sealing strip has a large elasticity and is prone to misalignment in the traditional gas three-way valve, resulting in unsatisfactory sealing effect. This misalignment phenomenon not only affects the performance of the gas three-way valve, but may also have a negative impact on the stable operation of the entire hot-rolled strip production line. Therefore, it is extremely important to design and develop a new type of gas three-way valve specifically for meeting the needs of hot-rolled strip production. This new valve must not only be able to withstand high temperatures and corrosive environments, but also ensure stable and reliable sealing performance, thereby improving production efficiency and product quality, and reducing maintenance costs and downtime. Through technological innovation, the problems existing in traditional technologies can be effectively solved, providing a more efficient and safe solution for hot-rolled strip production. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a three-way gas valve for hot-rolled strip production. An annular sealing groove is provided on the joint surface of the valve plate and the valve port, and the sealing groove is designed to be a trapezoidal structure. On the one hand, it can limit the position of the fluororubber sealing strip, and on the other hand, it can also prevent the fluororubber sealing strip from detaching from the sealing groove, ultimately ensuring the sealing performance of the three-way gas valve.

[0006] The technical solution adopted by the utility model is:

[0007] A gas three-way valve for hot-rolled strip production, comprising a valve body with three ports and two sets of valve cores located inside the valve body; each set of valve cores includes a valve plate and a driving mechanism for driving the movement of the valve plate; an annular sealing groove is provided on the docking surface between the valve plate and the valve port, and an annular fluororubber sealing strip is installed in the sealing groove; wherein: the sealing groove is of a trapezoidal structure; and the diameter of the opening position of the sealing groove is smaller than the diameter of the bottom of the sealing groove; the inclination angle of the trapezoidal structure is 22 degrees.

[0008] Preferably, the thickness of the valve plate is 14 mm, and the depth of the sealing groove is 8 mm.

[0009] Preferably, the diameter of the opening position of the sealing groove is 19 mm, and the diameter of the bottom of the sealing groove is 25 mm.

[0010] Preferably, the driving mechanism includes a cylinder, and the cylinder is fixedly connected to the valve plate through a valve rod.

[0011] Preferably, the cylinder is fixedly connected to the valve rod through a flange.

[0012] Preferably, the cylinder is fixedly connected to the valve plate through a flange.

[0013] Compared with the prior art, the advantages and positive effects of the present application are:

[0014] The utility model first carefully opens an annular sealing groove on the docking surface between the valve plate and the valve port. The purpose of this sealing groove is to accommodate the fluororubber sealing strip to ensure its correct installation and fixation. In this way, good limitation of the fluororubber sealing strip can be achieved, thereby avoiding the deviation of the fluororubber sealing strip due to various external forces during the working process, and further affecting the sealing effect.

[0015] Next, the utility model further optimizes the design of the sealing groove. The sealing groove is designed in a trapezoidal structure, and the characteristic of this structure is that the diameter of the opening position of the sealing groove is smaller than the diameter of the bottom of the sealing groove. In other words, the caliber of the opening position is smaller, while the internal caliber is larger. Such a design can effectively confine the fluororubber sealing strip firmly in the sealing groove, preventing the fluororubber sealing strip from popping out of the sealing groove under harsh working conditions such as high pressure or vibration, thereby ensuring the reliability and durability of the seal.

[0016] In order to further optimize the installation and removal and replacement process of the fluororubber sealing strip, through a large number of experimental tests, the present utility model finally determines that the inclination angle of the trapezoidal structure is 22 degrees. The selection of this inclination angle is based on in-depth research on the characteristics of the fluororubber material and the installation process. The 22-degree inclination angle can facilitate the smooth installation of the fluororubber sealing strip, and at the same time, when the sealing strip needs to be replaced, it can ensure that it can be easily taken out from the sealing groove, thus greatly simplifying the maintenance and replacement process and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 The front view of the preferred embodiment of the present application;

[0019] Figure 2 The side view of the preferred embodiment of the present application;

[0020] Figure 3 The top view of the preferred embodiment of the present application;

[0021] Figure 4 The front view of the valve plate in the preferred embodiment of the present application;

[0022] Figure 5 The partial enlarged view of the valve plate in the preferred embodiment of the present application;

[0023] Figure 6 The top view of the valve plate in the preferred embodiment of the present application.

[0024] Wherein: 1, valve body; 2, cylinder; 3, valve plate; 3-1, sealing groove; 4, valve stem; 5, fluororubber sealing strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those skilled 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.

[0026] In the description of the creation of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the present utility model can be understood through specific situations.

[0027] Please refer to Figures 1 to 6 , a gas three-way valve for hot-rolled strip production, which includes a valve body 1 with three ports. Two sets of independent valve cores are configured inside the valve body 1. Each set of valve cores consists of a valve plate 3 and a driving mechanism for driving the valve plate 3 to act. In order to ensure that the fluororubber sealing strip can obtain a good limiting effect and is convenient for disassembly and assembly, in this embodiment, an annular sealing groove 3-1 is specially designed on the docking surface between the valve plate 3 and the valve port. An annular fluororubber sealing strip 5 is installed in the sealing groove 3-1. The sealing groove 3-1 adopts a trapezoidal structure, and the diameter of the opening position is designed to be smaller than the diameter of the bottom of the sealing groove 3-1. In addition, the inclination angle of the trapezoidal structure is set to 22 degrees. The inclination angle refers to the included angle between the waist of the trapezoid and the bottom surface. Such a design helps to achieve the firm installation of the sealing strip.

[0028] Specifically, the thickness of the valve plate 3 is 14 mm, and the depth of the sealing groove 3-1 is 8 mm. The diameter of the opening position of the sealing groove 3-1 is 19 mm, and the diameter of the bottom of the sealing groove 3-1 is 25 mm. Therefore, in this embodiment, a sealing groove with a bottom size of 25 mm, an opening size of 19 mm, and a depth of 8 mm is newly opened on the contact surface of the valve plate of the gas three-way valve corresponding to the gas inlet. The inclination angle and groove depth of this design are both beneficial to the firmness after installing the sealing strip.

[0029] The driving mechanism includes a cylinder 2, and the cylinder 2 is fixedly connected to a valve plate 3 through a valve rod 4. The cylinder 2 is fixedly connected to the valve rod 4 and the valve plate 3 through a flange plate.

[0030] The working principle is as follows: In this application, a fluororubber sealing strip 5 is installed in the sealing groove 3-1. When the valve plate 3 closes the valve port under the action of the driving mechanism, the fluororubber sealing strip 5 can be in close contact with the inlet contact surface of the gas three-way valve, thereby achieving a good sealing effect.

[0031] The above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are all included in the protection scope of the present utility model.

Claims

1. A three-way gas valve for hot-rolled strip production, comprising a valve body (1) with three ports, and two sets of valve cores located inside the valve body (1); each set of valve cores comprises a valve plate (3) and a driving mechanism for driving the valve plate (3); characterized in that: An annular sealing groove (3-1) is provided on the butt joint surface between the valve plate (3) and the valve port, and an annular fluororubber sealing strip (5) is installed in the sealing groove (3-1); wherein: the sealing groove (3-1) is a trapezoidal structure; and the diameter of the opening position of the sealing groove (3-1) is smaller than the diameter of the bottom of the sealing groove (3-1); and the inclination angle of the trapezoidal structure is 22 degrees.

2. The three-way gas valve for hot-rolled strip production according to claim 1, characterized in that: The thickness of the valve plate (3) is 14 mm, and the depth of the sealing groove (3-1) is 8 mm.

3. The three-way gas valve for hot-rolled strip production according to claim 2, characterized in that: The diameter of the opening of the sealing groove (3-1) is 19 mm, and the diameter of the bottom of the sealing groove (3-1) is 25 mm.

4. The three-way gas valve for hot-rolled strip production according to claim 1, characterized in that: The driving mechanism comprises a cylinder (2), and the cylinder (2) is fixedly connected to the valve plate (3) via a valve stem (4).

5. The three-way gas valve for hot-rolled strip production according to claim 4, characterized in that: The cylinder (2) is fixedly connected to the valve stem (4) via a flange.

6. The three-way gas valve for hot-rolled strip production according to claim 4, characterized in that: The cylinder (2) is fixedly connected to the valve plate (3) via a flange.

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