Gate valve with positioning structure

Abstract

The utility model discloses a sluice valve with a positioning structure, which relates to the technical field of sluice valves and comprises a sluice valve main body, a pore plate is arranged on the left side in the sluice valve main body, a flashboard is arranged on the right side in the sluice valve main body, and a screw rod is in threaded connection with the top end in the flashboard. A rotating shaft connected with the gate valve body through a bearing is arranged at one end of the lead screw. The positioning mechanism is arranged, the supporting block is elastically connected with the gate valve body through the reset spring, and the gear ring is slidably connected with the gate valve body through the movable frame, so that after the gate valve body is fully opened or fully closed, the push-pull frame is loosened, the supporting block can reset under the action of the reset spring, and the gear ring is clamped with the fluted disc; therefore, the rotating shaft and the rotating disc are positioned and prevented from deflecting under the action of external force, the stability of the position of the gate plate can be ensured, and the influence on the sealing performance and normal operation of the gate valve is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve with a positioning structure. Background Technique

[0002] The opening and closing part of a gate valve is a gate plate. The moving direction of the gate plate is perpendicular to the fluid direction. A gate valve can only be fully opened and fully closed, and cannot be used for regulation and throttling. The gate plate has two sealing surfaces. In the most common mode, the two sealing surfaces of the gate plate valve form a wedge shape, and the wedge angle varies with the valve parameters. The driving methods of gate valves are divided into pneumatic gate valves, electric gate valves, and manual gate valves.

[0003] According to a gate valve with good sealing performance with the publication number of CN115183012B, it includes a valve body and a valve seat installed at the top of the valve body. A lifting component is installed at the top of the valve seat. The bottom end of the lifting component is connected to a gate plate component adapted to the valve body. A guiding component connected to the gate plate component is fixed on the inner side wall of the valve seat. Symmetric semi-circular plates are fixed at the top end of the gate plate component. The arc-shaped side walls of the semi-circular plates are attached to the inner side of the valve seat. The gate plate component includes a gate plate connected to the bottom end of the lifting component and a sealing component installed on one side of the gate plate. The sealing component is located on one side of the water inlet end of the valve body. The sealing component includes a sealing plate connected to the side wall of the gate plate. The present invention can perform the sealing work of the valve body through the action of water pressure. The higher the water pressure in the valve body, the greater the acting force of the extrusion component on the abutting component, and thus the higher the sealing strength between the sealing strip and the inner wall of the valve body.

[0004] In view of the above related solutions, the vertical movement of the gate plate is realized through the cooperation of a lead screw, a rotating shaft, and a turntable to achieve the full opening or full closing of the gate valve. However, in actual use, the turntable is prone to deflection due to external forces, which easily leads to the instability of the position of the gate plate, and even affects the sealing performance and normal operation of the gate valve. Content of the Utility Model

[0005] Based on this, the purpose of the present utility model is to provide a gate valve with a positioning structure to solve the technical problems raised in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A gate valve with a positioning structure, including a gate valve body, a orifice plate is provided on the left side inside the gate valve body, a gate plate is provided on the right side inside the gate valve body, a lead screw is threadedly connected to the top end inside the gate plate, one end of the lead screw is provided with a rotating shaft connected to the gate valve body through a bearing, a turntable is provided at one end of the rotating shaft, a positioning mechanism is provided outside the rotating shaft inside the gate valve body, the positioning mechanism includes a return spring, a movable frame and a push-pull frame, a toothed disc is sleeved outside the rotating shaft, a toothed ring is meshed and connected to the outside of the toothed disc, and a return spring is connected between the toothed ring and the gate valve body through a support block.

[0007] Preferably, the support block is welded to the toothed ring, and the support block and the gate valve body form an elastic structure through the return spring.

[0008] Preferably, a movable frame forming a sliding structure with the gate valve body is provided at the top end of the toothed disc, and a push-pull frame is slidably connected inside the turntable.

[0009] Preferably, limiting holes are symmetrically formed inside the gate plate, limiting rods are symmetrically welded and connected inside the gate valve body, and the gate plate and the gate valve body form a sliding structure through the limiting holes and the limiting rods.

[0010] Preferably, a sealing mechanism in contact with the gate plate is provided inside the orifice plate, and the sealing mechanism is composed of a first airbag, a second airbag and a connecting pipe.

[0011] Preferably, a second airbag is provided inside one side of the orifice plate, a first airbag is provided at the bottom end of the gate plate inside the gate valve body, and a connecting pipe is connected between the first airbag and the second airbag.

[0012] Preferably, the second airbag is arranged in an annular structure, and there are two second airbags.

[0013] In summary, the present utility model mainly has the following beneficial effects:

[0014] 1. When the existing gate valve is in use, the turntable is prone to deflection under the action of external force, which easily leads to the instability of the position of the gate plate, and even affects the sealing performance and normal operation of the gate valve. The present utility model is provided with a positioning mechanism. Since the support block and the gate valve body are elastically connected through the return spring, and the toothed ring and the gate valve body are slidably connected through the movable frame, after the gate valve body is fully opened or closed, when the push-pull frame is released, the support block will reset under the action of the return spring and make the toothed ring engage with the toothed disc, thereby realizing the positioning of the rotating shaft and the turntable, preventing them from deflecting under the action of external force, ensuring the stability of the position of the gate plate, and preventing the sealing performance and normal operation of the gate valve from being affected;

[0015] 2. The utility model is provided with a sealing mechanism. Since the two second air bags and the first air bag are communicated through a connecting pipe, when the gate plate moves vertically downward and the gate valve body is fully closed, the first air bag is extruded by the gate plate. At the same time, the excess gas inside it is sent into the second air bags through the connecting pipe, causing the two second air bags to expand and closely fit the surface of the gate plate, thereby realizing multiple seals and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional sectional view of the utility model;

[0017] Figure 2 is a front sectional view of the utility model;

[0018] Figure 3 is a partial three-dimensional view of the utility model;

[0019] Figure 4 is a three-dimensional exploded view of the utility model;

[0020] Figure 5 is a three-dimensional view of the utility model.

[0021] In the figure: 1. Gate valve body; 101. Orifice plate; 102. Gate plate; 103. Lead screw; 104. Rotating shaft; 105. Turntable; 2. Positioning mechanism; 201. Return spring; 202. Support block; 203. Tooth ring; 204. Tooth disc; 205. Movable frame; 206. Push-pull frame; 3. Sealing mechanism; 301. First air bag; 302. Second air bag; 303. Connecting pipe; 4. Limit hole; 5. Limit rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0023] Next, the embodiments of the present utility model will be described according to its overall structure.

[0024] A gate valve with a positioning structure, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown in the figure, it includes a gate valve body 1. On the left side inside the gate valve body 1, there is an orifice plate 101. On the right side inside the gate valve body 1, there is a gate plate 102. At the top end inside the gate plate 102, a lead screw 103 is threadedly connected. One end of the lead screw 103 is provided with a rotating shaft 104 connected to the gate valve body 1 through a bearing. One end of the rotating shaft 104 is provided with a turntable 105. By rotating the turntable 105, the rotating shaft 104, and the lead screw 103, the gate plate 102 is moved in the vertical direction, so that the gate valve body 1 can be fully closed or fully opened through the gate plate 102.

[0025] Refer to Figure 1 , Figure 2 and Figure 4 It can be seen that inside the orifice plate 101, there is a sealing mechanism 3 that fits with the gate plate 102. The sealing mechanism 3 is composed of a first airbag 301, a second airbag 302, and a connecting pipe 303. Inside one side of the orifice plate 101, there is a second airbag 302. Inside the gate valve body 1 and at the bottom end of the gate plate 102, there is a first airbag 301. A connecting pipe 303 is connected between the first airbag 301 and the second airbag 302. The second airbag 302 is arranged in an annular structure, and there are two second airbags 302.

[0026] Refer to Figure 2 and Figure 4 It can be seen that since the two second airbags 302 and the first airbag 301 are communicated through the connecting pipe 303, when the gate plate 102 moves vertically downward and the gate valve body 1 is fully closed, the first airbag 301 is squeezed by the gate plate 102. At the same time, the excess gas inside it is sent into the second airbag 302 through the connecting pipe 303, so that the two second airbags 302 expand and fit tightly with the surface of the gate plate 102, thus realizing multiple seals and improving the sealing effect.

[0027] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 It can be seen that inside the gate valve body 1 and outside the rotating shaft 104, there is a positioning mechanism 2. The positioning mechanism 2 includes a return spring 201, a movable frame 205, and a push-pull frame 206. A toothed disc 204 is sleeved outside the rotating shaft 104. A toothed ring 203 is meshed and connected to the outside of the toothed disc 204. A return spring 201 is connected between the toothed ring 203 and the gate valve body 1 through a support block 202. The support block 202 is welded to the toothed ring 203. The support block 202 and the gate valve body 1 form an elastic structure through the return spring 201. At the top of the toothed disc 204, there is a movable frame 205 that forms a sliding structure with the gate valve body 1. Inside the turntable 105, there is a push-pull frame 206 that is slidably connected.

[0028] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 it can be seen that since the support block 202 is elastically connected to the gate valve body 1 through the return spring 201, and the gear ring 203 is slidably connected to the gate valve body 1 through the movable frame 205, after the gate valve body 1 is fully opened or closed, when the push-pull frame 206 is released, the support block 202 will reset under the action of the return spring 201 and cause the gear ring 203 to engage with the gear disc 204, thereby realizing the positioning of the rotating shaft 104 and the turntable 105, preventing them from deflecting when subjected to external forces, ensuring the stability of the position of the gate plate 102, and preventing the sealing performance and normal operation of the gate valve body 1 from being affected.

[0029] Referring to Figure 1 , Figure 3 and Figure 4 it can be seen that symmetric limiting holes 4 are formed inside the gate plate 102, symmetric limiting rods 5 are welded and connected inside the gate valve body 1, and the gate plate 102 and the gate valve body 1 form a sliding structure through the limiting holes 4 and the limiting rods 5, which can play a role in supporting and limiting the gate plate 102, preventing the gate plate 102 from rotating together with the lead screw 103, and improving the stability.

[0030] The working principle of the present utility model is as follows: When using the gate valve with a positioning structure, the push-pull frame 206 can be pressed downward to push the movable frame 205 and the gear ring 203 to move vertically downward, and at the same time, the gear ring 203 is separated from the gear disc 204. At this time, the gate plate 102 can be moved vertically by rotating the turntable 105, the rotating shaft 104, and the lead screw 103, so that the full closing operation of the gate valve body 1 can be realized through the gate plate 102. During this process, the first airbag 301 is squeezed by the gate plate 102, and at the same time, the excess gas inside it is sent into the second airbag 302 through the connecting pipe 303, causing the two second airbags 302 to expand and closely fit the surface of the gate plate 102, thereby realizing multiple seals. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0031] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and do not limit the utility model. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not make creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A gate valve with a positioning structure, comprising a gate valve body (1), characterized in that: On the left side inside the gate valve body (1), there is an orifice plate (101). On the right side inside the gate valve body (1), there is a gate plate (102). At the top end inside the gate plate (102), a lead screw (103) is threadedly connected. One end of the lead screw (103) is provided with a rotating shaft (104) connected to the gate valve body (1) through a bearing. One end of the rotating shaft (104) is provided with a turntable (105). Inside the gate valve body (1), a positioning mechanism (2) is arranged outside the rotating shaft (104). The positioning mechanism (2) includes a return spring (201), a movable frame (205), and a push-pull frame (206). A toothed disc (204) is sleeved outside the rotating shaft (104). A toothed ring (203) is meshed and connected to the outside of the toothed disc (204). Between the toothed ring (203) and the gate valve body (1), a return spring (201) is connected through a support block (202).

2. The gate valve with a positioning structure according to claim 1, characterized in that: The support block (202) is welded to the toothed ring (203). The support block (202) and the gate valve body (1) form an elastic structure through the return spring (201).

3. The gate valve with a positioning structure according to claim 1, characterized in that: At the top end of the toothed disc (204), there is a movable frame (205) forming a sliding structure with the gate valve body (1). Inside the turntable (105), a push-pull frame (206) is slidably connected.

4. A gate valve with a positioning structure according to claim 1, characterized in that: Inside the gate plate (102), limiting holes (4) are symmetrically opened. Inside the gate valve body (1), limiting rods (5) are symmetrically welded. The gate plate (102) and the gate valve body (1) form a sliding structure through the limiting holes (4) and the limiting rods (5).

5. The gate valve with a positioning structure according to claim 1, characterized in that: Inside the orifice plate (101), a sealing mechanism (3) that fits the gate plate (102) is arranged. The sealing mechanism (3) is composed of a first airbag (301), a second airbag (302), and a connecting pipe (303).

6. The gate valve with a positioning structure according to claim 5, characterized in that: Inside one side of the orifice plate (101), the second airbag (302) is arranged. Inside the gate valve body (1), at the bottom end of the gate plate (102), the first airbag (301) is arranged. A connecting pipe (303) is connected between the first airbag (301) and the second airbag (302).

7. The gate valve with a positioning structure according to claim 6, wherein: The second airbag (302) is arranged in an annular structure, and there are two second airbags (302).

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