Expansion mechanism of expansion gate valve
By improving the expansion mechanism of the expansion gate valve and using a rocker arm in conjunction with the inclined guide surface of the guard plate, the problem of lag in the linkage between the rocker arm and the slider is solved, enabling rapid opening and closing and low-cost manufacturing.
Patent Information
- Application Number
- CN202520165193.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing expansion gate valves suffer from a lag in the linkage between the rocker arm and the slider during the opening and closing process. This results in the gate not expanding or contracting in a timely manner, leading to problems such as high opening and closing torque, damage to the sealing surface, and valve jamming.
A new expansion mechanism design is adopted, eliminating the slider. The main gate and auxiliary gate expand or contract directly by cooperating with the outer contour of the rocker arm and the inclined guide surface of the guard plate. The slider structure is eliminated, and spot welding is used to fix the screws and nuts, simplifying the manufacturing process.
It achieves rapid response of the gate, avoids jamming, reduces opening and closing torque, simplifies the structure, reduces processing costs, and improves economy.
Smart Images
Figure CN223708595U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to expansion gate valve, concretely relates to a kind of expansion mechanism of expansion gate valve. BACKGROUND
[0002] Expansion gate valve as a kind of cut-off valve, it is direct through when full opening whole flow passage, because pressure loss is small, pressure, temperature range is wide, sealing performance is good and so on, so it is more common to use.Expansion gate valve is relied on expansion mechanism to realize expansion and shrinkage between two gate plates, and conventional expansion mechanism is realized by rocker and slider two parts cooperation.But the linkage lag phenomenon of rocker and slider exists in the process of valve opening and closing of this structure, leading to the expansion or shrinkage between two gate plates cannot be timely, at this time, the torque of opening and closing valve is large, sealing surface can be hard pulled injury, even valve jam phenomenon occurs, therefore, we propose a kind of expansion mechanism of expansion gate valve. SUMMARY
[0003] The utility model provides a kind of expansion mechanism of expansion gate valve, solve the linkage lag phenomenon of rocker and slider exists in the process of opening and closing of existing expansion gate valve, leading to the expansion or shrinkage between two gate plates cannot be timely, at this time, the torque of opening and closing valve is large, sealing surface can be hard pulled injury, even valve jam phenomenon occurs.
[0004] To solve the above technical problems, the utility model provides the following technical scheme: a kind of expansion mechanism of expansion gate valve, including main gate plate, auxiliary gate plate, screw, rocker, nut, guard plate and valve body, the main gate plate and auxiliary gate plate are movably installed in the valve body, the main gate plate and auxiliary gate plate are respectively connected with screw by screw thread, rocker is movably installed on two screws, nut is connected by screw thread on the outer side of rocker of two screws, the left and right sides of rocker in the valve body are respectively fixedly connected with guard plate.
[0005] On the basis of the above scheme, the screw is equipped with step, the step is located between main gate plate and rocker, between auxiliary gate plate and rocker, respectively between main gate plate and rocker, between auxiliary gate plate and rocker, it is equipped with spot welding, between screw and nut, it is equipped with spot welding.
[0006] On the basis of the above scheme, the bottom of left side guard plate is equipped with inclined ramp guide surface, and the top of right side guard plate is equipped with inclined ramp guide surface.
[0007] The utility model discloses an expansion mechanism of expansion gate valve has the beneficial effect compared with prior art: an expansion mechanism of expansion gate valve adopts new structure, improves the existing expansion gate valve, discards the sliding block, changes the appearance of rocker, and the main gate board and the auxiliary gate board are driven to expand and contract through the cooperation of the outer contour of rocker and the slope guide surface of the guard plate, the main gate board and the auxiliary gate board immediately expand or contract response very fast in the switching moment of the valve, and it will not lag behind as before, and it will not be stuck, and the opening and closing are very smooth, and the torque is smaller than before, and since there is no sliding block, it is not necessary to mill the groove on the gate plate, the structure becomes simple, the processing cost is reduced greatly, and the economy is improved. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 It is the structural schematic diagram of the expansion mechanism of the utility model expansion gate valve;
[0009] Figure 2 It is the A-A view of the utility model; Figure 1
[0010] Figure 3 It is the screw structure schematic diagram of the expansion mechanism of the utility model expansion gate valve.
[0011] The figure mark is: 1 - main gate board, 2 - auxiliary gate board, 3 - screw, 301 - step, 4 - rocker, 5 - nut, 6 - guard plate, 601 - slope guide surface, 7 - valve body, 8 - spot welding. DETAILED DESCRIPTION
[0012] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is in combination with the drawings and example, and the utility model is further described in detail.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0013] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as a limitation on the utility model.
[0014] Referring to Figures 1 to 3 The expansion mechanism of the expansion gate valve, which is an improvement on the existing expansion gate valve, is characterized in that: the expansion mechanism of the expansion gate valve comprises a main gate plate 1, a secondary gate plate 2, a screw 3, a rocker 4, a nut 5, a guard plate 6 and a valve body 7, the main gate plate 1 and the secondary gate plate 2 are movably arranged in the valve body 7, the screw 3 is threadedly connected to the main gate plate 1 and the secondary gate plate 2, respectively, the rocker 4 is movably arranged on the two screws 3, the nut 5 is threadedly connected to the outer sides of the two screws 3, the nut 5 is not pressed against the rocker 4, the rocker 4 is movably sleeved on the screw 3, and the guard plate 6 is fixedly connected to the left and right sides of the rocker 4 in the valve body 7.
[0015] The screw 3 is provided with a step 301 between the main gate plate 1 and the rocker 4 and between the secondary gate plate 2 and the rocker 4, the main gate plate 1 and the rocker 4 and the secondary gate plate 2 and the rocker 4 are respectively provided with a welding spot 8 for fixation, the screw is fixed on the main gate plate 1 and the secondary gate plate 2 through the welding spot 8, the screw 3 and the nut 5 are fixed through the welding spot 8, the position of the nut 5 is fixed to prevent loosening and falling, the left guard plate 6 is provided with an inclined guide surface 601 at the bottom, and the right guard plate 6 is provided with an inclined guide surface 601 at the top, the inclined guide surface 601 can guide the operation of the rocker 4.
[0016] The principle and advantages of the utility model are as follows: the expansion mechanism of the expansion gate valve is an improvement on the existing expansion gate valve, when installing, the screw 3 is screwed into the threaded holes in the main gate plate 1 and the secondary gate plate 2 through thread cooperation, and the welding spot 8 is arranged between the main gate plate 1, the secondary gate plate 2 and the step 301 to prevent the thread from loosening, then the holes in the rocker 4 are respectively sleeved on the two screws 3, finally the nut 5 is screwed on the screw 3 to fix the rocker 4, and the contact surfaces of the screw 3 and the nut 5 are fixed through the welding spot 8 to prevent the nut 5 from loosening, the working principle of the expansion mechanism is that: when the valve is fully opened or closed, the arc surface of the rocker 4 is in contact with the inclined guide surface 601 of the guard plate 6, at this time, the rocker 4 will swing to drive the inclined surfaces of the main gate plate 1 and the secondary gate plate 2 to slide relative to each other to realize expansion and contraction under the guidance of the inclined guide surface 601 of the guard plate 6 when the gate plate is lifted, the utility model has the advantages of simple and reasonable structure, good use effect, low manufacturing cost and suitability for popularization and use.
[0017] The above merely describes the preferred embodiment of the utility model and is not used to limit the utility model, any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. An expansion mechanism for an expansion gate valve, comprising a main gate (1), a secondary gate (2), a screw (3), a rocker arm (4), a nut (5), a protective plate (6), and a valve body (7), characterized in that: The valve body (7) is movably installed with a main gate (1) and a secondary gate (2). The main gate (1) and the secondary gate (2) are respectively connected by screws (3) through threads. A rocker arm (4) is movably installed on the two screws (3). The two screws (3) are located on the outside of the rocker arm (4) and are connected by nuts (5) through threads. The valve body (7) is fixedly connected with guard plates (6) on the left and right sides of the rocker arm (4).
2. The expansion mechanism of an expansion gate valve according to claim 1, characterized in that, The screw (3) is provided with a step (301), the step (301) is located between the main gate plate (1) and the rocker arm (4), and between the auxiliary gate plate (2) and the rocker arm (4). The main gate plate (1) and the rocker arm (4) and the auxiliary gate plate (2) and the rocker arm (4) are respectively fixed by spot welding (8). The screw (3) and the nut (5) are fixed by spot welding (8).
3. The expansion mechanism of an expansion gate valve according to claim 1, characterized in that, The left side guard plate (6) has a ramp guide surface (601) at the bottom and the right side guard plate (6) has a ramp guide surface (601) at the top.