Double-ball valve convenient to open and close

Abstract

According to the technical scheme, the double-ball valve convenient to open and close is characterized in that the double-ball valve convenient to open and close comprises a pipeline and two ball valves distributed in the length direction of the pipeline, each ball valve comprises a valve rod and a handle fixedly connected with the valve rod, and the double-ball valve convenient to open and close further comprises a transmission assembly; the transmission assembly comprises two traction rods fixedly connected with the two valve rods correspondingly, two traction shafts located at the ends, away from the valve rods, of the two traction rods correspondingly, and a first transmission rod with the two ends rotationally connected with the two traction shafts correspondingly, and the axis direction of the two traction shafts is parallel to the axis direction of the valve rods. The height of the first transmission rod is higher than that of the traction rod, one handle is driven to drive the valve rod to rotate, so that the first transmission rod drives the other handle and the valve rod to rotate integrally, and the problems that in the prior art, production cost is high, the structure is complex, and maintenance cost is high are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, and more specifically to a double-ball valve that is convenient to open and close. Background Art

[0002] There is a double-ball valve for opening and closing driven by gears with the publication number of "CN207034240U". It is provided with two groups of ball valves in the pipeline length direction. An adjusting rotating shaft is added between the two ball valves, and the driving of the driving gear and the driven gear is used to realize the simultaneous opening or closing of the two ball valves. Although the operation method is simplified and synchronous operation is achieved, there are still defects in the structure. First, the gear drive method will increase the complexity of the structure. And as the distance between the two ball valves increases, the required gear size and the number of gears will also increase accordingly, which not only increases the production cost, but also further increases the assembly difficulty and complexity of the structure. Thus, the probability of problems will increase, greatly affecting the smoothness of daily operation. Second, lubricating oil needs to be regularly replenished between the gears to maintain the smoothness of the drive, and the maintenance cost is high. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a double-ball valve with low production cost, high smoothness of opening or closing, and low maintenance cost.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A double-ball valve that is convenient to open and close, including a pipeline and two ball valves distributed along the pipeline length direction. Both of the two ball valves include a valve stem and a handle fixedly connected to the valve stem. It further includes a transmission assembly. The transmission assembly includes two traction rods respectively fixedly connected to the two valve stems, two traction shafts respectively positioned at the ends of the two traction rods far from the valve stems where they are located, and a first transmission rod with both ends respectively rotatably connected to the two traction shafts. The axis directions of the two traction shafts are parallel to the axis direction of the valve stem. The height of the first transmission rod is higher than the height of the traction rod. By driving one of the handles to drive the valve stem to rotate, the first transmission rod drives the other handle and the whole valve stem to rotate.

[0005] As a further improvement of the utility model, the transmission assembly further includes a second transmission rod with both ends respectively rotatably connected to the two traction shafts. The height of the second transmission rod is lower than the height of the traction rod.

[0006] As a further improvement of the utility model, both the first transmission rod and the second transmission rod are curved and convex towards the outside of the vertical plane where the two ball valves are located.

[0007] Advantages of the present utility model: By rotating one of the handles, the corresponding traction rod and traction shaft rotate along with the valve stem. While the first transmission rod rotates relative to the traction shaft, it also moves, thereby driving the rotation of the other traction shaft, the other traction rod, the other valve stem, and the other handle as a whole, realizing the simultaneous opening or closing operation of the two ball valves. Such a design can simplify the transmission structure compared with the prior art using gear transmission. The number of required parts is not affected by the distance between the two valve stems, and the number of connection points is small, thus ensuring the smoothness and stability of the transmission, not only reducing the production cost but also the maintenance cost. Description of the Drawings

[0008] Figure 1 is the main sectional view of the present utility model;

[0009] Figure 2 is the three-dimensional view of the present utility model;

[0010] Figure 3 is Figure 2 the enlarged view of part A in

[0011] Figure 4 is the schematic diagram when the transmission component in the present utility model undergoes conversion.

[0012] Reference signs: 1, pipeline; 2, ball valve; 21, valve stem; 22, handle; 3, transmission component; 31, traction rod; 32, traction shaft; 33, first transmission rod; 34, second transmission rod. Detailed Embodiment

[0013] The present utility model will be further described in detail below with reference to the drawings and embodiments. The same components are denoted by the same reference signs.

[0014] Referring to Figures 1 to 4 as shown, a double-ball valve valve convenient for opening and closing in this embodiment includes a pipeline 1 and two ball valves 2 distributed along the length direction of the pipeline 1. Both ball valves 2 include a valve stem 21 and a handle 22 fixedly connected to the valve stem 21;

[0015] Based on the above-mentioned prior art, it also includes a transmission component 3, which includes two traction rods 31, two traction shafts 32 and a first transmission rod 33. Both ends of the two traction rods 31 are integrally formed with collars. The parts of the valve stem 21 and the traction shaft 32 for the collars to be sleeved are both prisms. One end of the two traction rods 31 is respectively sleeved outside the ends of the two valve stems 21, and the collars are screwed in from one side with fastening bolts and touch the outer wall of the valve stem 21. The traction rods 31 are relatively fixed to the corresponding valve stems 21. The length directions of the two traction rods 31 are perpendicular to the axial direction of the valve stem 21. The two traction shafts 32 are respectively passed through another collar of the two traction rods 31, and the collars are screwed in from one side with fastening bolts and touch the outer wall of the traction shaft 32. The traction shaft 32 is relatively fixed to the corresponding traction rod 31. The axial direction of the two traction shafts 32 is parallel to the axial direction of the valve stem 21. Both ends of the traction shaft 32 are integrally formed with a cylinder whose outline size is smaller than the outline size of the end portion, and an external thread is processed outside the cylinder. Through holes for the cylinder to pass through are opened at both ends of the first transmission rod 33. The two ends of the first transmission rod 33 are respectively sleeved on the outside of the cylinder where the two traction shafts 32 are located above the plane where the traction rod 31 is located, and then a nut is screwed outside the cylinder so that the end of the first transmission rod 33 is limited to the corresponding traction shaft 32; during use, the staff can choose one of the handles 22 to rotate according to the distance, and the corresponding traction rod 31 and traction shaft 32 rotate with the valve stem 21. The first transmission rod 33 moves while rotating relative to the traction shaft 32, thereby driving the other traction shaft 32, the other traction rod 31, the other valve stem 21 and the other handle 22 to rotate as a whole, so as to realize the operation of opening or closing the two ball valves 2 at the same time;

[0016] Compared with the gear transmission design in the prior art, this design can simplify the transmission structure. The number of required parts will not be affected by the distance between the two valve stems 21, and the number of connection points is small, thereby ensuring the smoothness and stability of the transmission, which not only reduces production costs but also reduces maintenance costs.

[0017] As a specific implementation method of the improvement, refer to Figures 1 to 3 As shown, the transmission assembly 3 also includes a second transmission rod 34, whose two ends are rotatably connected to the two traction shafts 32 respectively. The height of the second transmission rod 34 is lower than the height of the traction rod 31. The second transmission rod 34 has the same structural shape as the first transmission rod 33. The second transmission rod 34 and the first transmission rod 33 are symmetrically arranged relative to the plane where the traction rod 31 is located. Compared with the design of only using the first transmission rod 33, such a design can further improve the structural stability and structural strength of the transmission assembly 3, thereby ensuring the smoothness and stability of the two valve stems 21 when linked; the design of the force at both ends of the traction shaft 32 makes the traction shaft 32 as a whole evenly stressed and not easy to be damaged, thereby indirectly extending the service life of the traction shaft 32.

[0018] As a specific implementation of the improvement, with reference to Figure 2 and Figure 4 As shown, both the first transmission rod 33 and the second transmission rod 34 are bent and convex towards the outside of the vertical plane where the two ball valves 2 are located. Such a design can, compared with the design of processing the first transmission rod 33 and the second transmission rod 34 into straight shapes, cause slight tensile deformation of the first transmission rod 33 and the second transmission rod 34 during the process of one valve stem 21 pulling the other valve stem 21, playing a role in buffering the pulling force, so that the forces on the first transmission rod 33 and the second transmission rod 34 are rationalized, and avoiding the phenomenon that the first transmission rod 33 and the second transmission rod 34 are easily broken; at the same time, during use, if a force is applied to the first transmission rod 33 and the second transmission rod 34 from the side where the first transmission rod 33 and the second transmission rod 34 are convex, the arched shape of the first transmission rod 33 and the second transmission rod 34 can further improve the anti-bending ability of the first transmission rod 33 and the second transmission rod 34, thus ensuring the structural stability of the first transmission rod 33 and the second transmission rod 34.

[0019] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A double-ball valve that is convenient for opening and closing, comprising a pipeline (1) and two ball valves (2) distributed along the length direction of the pipeline (1). Both of the two ball valves (2) include a valve stem (21) and a handle (22) fixedly connected to the valve stem (21), and is characterized in that: It further includes a transmission assembly (3), and the transmission assembly (3) includes two traction rods (31) respectively fixedly connected to two valve stems (21), two traction shafts (32) respectively positioned at the ends of the two traction rods (31) far away from the corresponding valve stems (21), and a first transmission rod (33) with two ends respectively rotatably connected to the two traction shafts (32). The axial directions of the two traction shafts (32) are parallel to the axial direction of the valve stem (21). The height of the first transmission rod (33) is higher than the height of the traction rod (31). By driving one of the handles (22) to drive the valve stem (21) to rotate, the first transmission rod (5) drives the other handle (22) and the valve stem (21) to rotate as a whole.

2. The double-ball valve according to claim 1, which is convenient to open and close, is characterized in that: The transmission assembly (3) further includes a second transmission rod (34) with two ends respectively rotatably connected to the two traction shafts (32), and the height of the second transmission rod (34) is lower than the height of the traction rod (31).

3. The double-ball valve that is convenient to open and close according to claim 2, wherein: Both the first transmission rod (33) and the second transmission rod (34) are curved and convex towards the outside of the vertical plane where the two ball valves (2) are located.

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