A wedge gate valve facilitating removal of impurities

Abstract

The utility model discloses a wedge type gate valve convenient to remove impurity, its technical scheme main points are including valve body, valve plate, two valve seats and gland, be provided with the accumulation tank of being located the valve plate directly below in the valve body, and the accumulation tank tank bottom is inserted with the rotating drum that can rotate relative to the accumulation tank, and the rotating drum is hollow in the inside and the inner chamber shape is prismatic, and the outer wall of valve body is connected with the plugging bolt of rotating drum coaxial with screw thread, and the end of plugging bolt is coaxially provided with the drive rod that is matched with the inner chamber of rotating drum, and the rotating drum outer wall is provided with a plurality of pass impurity hole that is circularly distributed around the rotating drum axis and is partially located in the accumulation tank tank bottom, and the rotating drum outer wall is provided with a plurality of top stirring vane that is circularly distributed around the rotating drum axis and does not interfere with each other with pass impurity hole, and the end of a plurality of top stirring vane away from the rotating drum outer wall is located the circular diameter that is greater than the distance between two glands, and the vertical height between top stirring vane and gland is less than the depth of rotating drum insertion accumulation tank tank bottom, has solved the problem that the impurity of prior art is difficult to clean.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and more specifically to a wedge gate valve that facilitates the removal of impurities. Background Technology

[0002] Gate valves are widely used in the petroleum, natural gas, and chemical industries and are a standardized and universal product. Among gate valves, wedge gate valves have the best sealing performance because both the valve plate and the valve seat are wedge-shaped. Under the thrust of the valve stem, the clamping force between the two is proportional to the thrust of the valve stem. Therefore, the specific pressure at the sealing surface of the valve plate and the valve seat is very large, which is beneficial to sealing. Wedge gate valves are commonly used, especially for high-pressure valves. To ensure a seal, wedge gate valves must ensure that the angle between the valve seats and the angle between the gate plates are completely matched. Otherwise, if the sealing surfaces of the valve plate and the valve seat are not completely fitted, leakage will occur. Even if the sealing surfaces of a new valve are fitted, the included angle will change after wear and tear, which often causes leakage. Moreover, traditionally, the valve seat is embedded in the valve body or welded to the valve body to form a fixed sealing structure, which makes it difficult to ensure that the angle between the valve seats and the angle between the gate plates are completely matched.

[0003] Currently, Chinese patent CN205715739U discloses a floating seat wedge gate valve. It elastically connects the valve seat to the valve body, allowing the valve seat to fully fit with the valve plate under the action of a spring, thus forming an effective seal. Although it solves the problem of conventional gate valves being unable to fit tightly due to wear of the sealing surface, it has the same problem as conventional gate valves: impurities easily accumulate at the bottom of the valve body between the two valve seats. When the valve plate is closed, it will compact the impurities, making them difficult to clean. At the same time, the downward movement distance of the valve plate cannot reach the predetermined value, affecting the sealing performance. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a wedge gate valve that is easy to clean impurities.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wedge gate valve for easy impurity removal, comprising a valve body, a valve plate located within the valve body, two valve seats located on both sides of the valve plate and elastically connected to the valve body, and a pressure cap that confines the valve seats within the valve body. The valve body has an accumulation groove located directly below the valve plate. A rotating cylinder, capable of rotating relative to the accumulation groove, is inserted into the bottom of the groove. The rotating cylinder is hollow and has a prismatic inner cavity. A sealing bolt, coaxial with the rotating cylinder, is threaded onto the outer wall of the valve body. A fitting coaxially with the inner cavity of the rotating cylinder is provided at the end of the sealing bolt. A matching drive rod is provided. The outer wall of the rotating drum is provided with multiple passage holes that are circumferentially distributed around the axis of the rotating drum and partially located in the bottom of the accumulation tank. The outer wall of the rotating drum is provided with multiple top stirring blades that are circumferentially distributed around the axis of the rotating drum and do not interfere with the passage holes. The circumferential diameter of the ends of the multiple top stirring blades away from the outer wall of the rotating drum is greater than the distance between the two pressure caps. The vertical height between the top stirring blades and the pressure caps is less than the depth of the rotating drum inserted into the bottom of the accumulation tank. By rotating the sealing bolt, the top stirring blades are made to rotate with the rotating drum, so that impurities can flow through the passage holes and out of the valve body.

[0006] As a further improvement of this utility model, the outer wall of the rotating drum is also provided with a plurality of bottom stirring blades that are circumferentially distributed around the axis of the rotating drum and do not interfere with the passage holes. The height of the plurality of bottom stirring blades is lower than the height of the top stirring blades. The plurality of bottom stirring blades and the plurality of top stirring blades are alternately arranged in the circumferential direction centered on the axis of the rotating drum.

[0007] As a further improvement of this utility model, the plurality of bottom stirring blades and the plurality of top stirring blades are all inclined relative to the axis of the rotating cylinder.

[0008] As a further improvement of this utility model, the plurality of bottom stirring blades and the plurality of top stirring blades are all curved.

[0009] The beneficial effects of this utility model are as follows: by unscrewing the sealing bolt, the top stirring blade rotates with the rotating drum, allowing impurities to flow through the impurity passage and out of the valve body. Compared with the prior art, this design can loosen the compacted impurities, making it easier for them to flow out of the valve body and improving the impurity removal efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0012] Figure 3 This is a perspective view of the transfer cylinder and sealing bolts of this utility model when they are disassembled.

[0013] Reference numerals: 1. Valve body; 2. Valve plate; 3. Valve seat; 4. Gland; 5. Accumulation tank; 6. Rotary drum; 7. Sealing bolt; 8. Drive rod; 9. Through hole; 10. Top agitator blade; 11. Bottom agitator blade. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0015] Reference Figures 1 to 3 As shown, a wedge gate valve for easy discharge of impurities in this embodiment includes a valve body 1, a valve plate 2 located inside the valve body 1, two valve seats 3 located on both sides of the valve plate 2 and elastically connected to the valve body 1, and a pressure cap 4 that confines the valve seats 3 inside the valve body 1. An accumulation groove 5 located directly below the valve plate 2 is provided inside the valve body 1.

[0016] Based on the aforementioned prior art, a rotating groove and a threaded hole are coaxially arranged in the accumulation groove 5 of the valve body 1. The inner diameter of the rotating groove is larger than the inner diameter of the threaded hole. The outer diameter of the rotating cylinder 6 matches the inner diameter of the rotating groove. The rotating cylinder 6 is cylindrical in shape and hollow inside with a prismatic inner cavity. Multiple through holes 9 are cut on the outer wall of the rotating cylinder 6 in a circular distribution around the axis of the rotating cylinder 6. The length direction of the multiple through holes 9 is parallel to the axis of the rotating cylinder 6, and one end of the through holes 9 extends to the end face of the rotating cylinder 6. Multiple top stirring blades 10 are welded on the outer wall of the rotating cylinder 6 in a circular distribution around the axis of the rotating cylinder 6. The multiple fixed stirring blades 10 are all close to the port of the rotating cylinder 6 where no through holes 9 are machined. A drive rod 8 that matches the inner cavity of the rotating cylinder 6 is integrally formed on the end of the sealing bolt 7 away from the nut. The length of the drive rod 8 is greater than the length of the threaded hole.

[0017] During assembly, the sealing bolt 7 is screwed in from the outside to the inside of the valve body 1 until the nut of the sealing bolt 7 touches the outer wall of the valve body 1. The drive rod 8 passes through the rotating groove and one end is located in the accumulation groove 5. Then, the rotating cylinder 6 is installed into the valve body 1 from the upper opening of the valve body 1. The rotating cylinder 6 is sleeved on the outside of the drive rod 8 and one end is inserted into the rotating groove. The two ends of the multiple passage holes 9 are located in the rotating groove and the accumulation groove 5, respectively. The multiple fixed stirring blades 10 are all located in the accumulation groove 5. Next, the valve seat 3 and the pressure cap 4 are installed into the valve body 1 one after another. The distance between the bottoms of the two pressure caps 4 near the opening of the accumulation groove 5 is less than the circumference diameter of the ends of the multiple top stirring blades 10 away from the outer wall of the rotating cylinder 6. At the same time, the vertical height between the top stirring blades 10 and the pressure caps 4 is less than the height of the rotating groove. This satisfies the condition that when the top stirring blades 10 move upward and touch the pressure caps 4, the rotating cylinder 6 does not leave the rotating groove. Finally, the valve plate 2, valve stem and valve cover are assembled with the valve body 1 in sequence.

[0018] During the cleaning process, the sealing bolt 7 is rotated outwards from the valve body 1. The rotating drum 6 and the top stirring blade 10 rotate synchronously with the sealing bolt 7. The impurities in the accumulation tank 5 are loosened by the top stirring blade 10. At the same time, the drive rod 8 gradually retracts from the rotating drum 6 until the sealing bolt 7 disengages from the threaded hole. The sealing bolt 7 is then pulled away from the valve body 1, and the drive rod 8 separates from the rotating drum 6. The impurities in the accumulation tank 5 flow through the impurity passage 9 and the threaded hole and are discharged from the valve body 1. Once no more impurities flow out of the accumulation tank 5, the threaded hole and the accumulation tank 5 can be cleaned by spraying water with a water gun or other tools. The sealing bolt 7 can be cleaned separately. After cleaning, the sealing bolt 7 is reinstalled into the valve body. If the drive rod 8 is not aligned with the inner cavity of the rotating drum 6, the drive rod 8 passes through the threaded hole and touches one end of the rotating drum 6. The bolt part of the sealing bolt 7 does not enter the threaded hole. The rotating drum 6 is lifted by the drive rod 8 so that the top stirring blade 10 touches the pressure cover 4 and the rotating drum 6 does not leave the rotating groove. Then, by rotating the sealing bolt 7 until the end of the drive rod 8 is aligned with the inner cavity of the rotating drum 6 and enters the rotating drum 6, the rotating drum 6 moves downward under the action of gravity and touches the bottom of the rotating groove. The top stirring blade 10 separates from the pressure cover 4, and the stud part of the sealing bolt 7 enters the threaded hole. Finally, rotate the sealing bolt 7 so that the sealing bolt 7 is screwed back into place with the valve body 1 for the next cleaning.

[0019] Compared with existing technologies, this design can loosen the compacted impurities, making it easier for the impurities to flow out of the valve body 1 and improving the impurity removal efficiency.

[0020] As one specific implementation method of the improvement, refer to Figure 3 As shown, multiple bottom stirring blades 11 are also provided on the outer wall of the rotating drum 6, which are circumferentially distributed around the axis of the rotating drum 6 and do not interfere with the impurity passage 9. The height of the multiple bottom stirring blades 11 is lower than the height of the top stirring blades 10. The multiple bottom stirring blades 11 and the multiple top stirring blades 10 are alternately arranged in the circumferential direction centered on the axis of the rotating drum 6. This design can increase the longitudinal area of ​​impurities being stirred, the impurities are stirred more fully, the flowability of impurities is improved, and the impurity removal efficiency is further improved.

[0021] As one specific implementation method of the improvement, refer to Figure 3 As shown, multiple bottom stirring blades 11 and multiple top stirring blades 10 are all inclined relative to the axis of the rotating drum 6. This design can reduce the resistance encountered by the stirring blades when stirring impurities, improve the rotation efficiency, and facilitate the unscrewing of the sealing bolts 7 out of the valve body 1.

[0022] As one specific implementation method of the improvement, refer to Figure 3 As shown, the multiple bottom stirring blades 11 and multiple top stirring blades 10 are all curved. This design can improve the bending resistance of the stirring blades and indirectly improve the structural strength and stability of the stirring blades.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A wedge gate valve with easy impurity removal, comprising a valve body (1), a valve plate (2) located in the valve body (1), two valve seats (3) respectively located on both sides of the valve plate (2) and elastically connected with the valve body (1), and a gland (4) for limiting the valve seat (3) in the valve body (1), wherein an accumulation tank (5) is arranged below the valve plate (2) in the valve body (1), characterized in that: A rotating cylinder (6) capable of rotating relative to the storage tank (5) is inserted into the bottom of the storage tank (5). The rotating cylinder (6) is hollow inside and has a prismatic inner cavity. A sealing bolt (7) coaxial with the rotating cylinder (6) is threaded onto the outer wall of the valve body (1). A drive rod (8) matching the inner cavity of the rotating cylinder (6) is coaxially provided on the end of the sealing bolt (7). Multiple through holes (9) are provided on the outer wall of the rotating cylinder (6) in a circular pattern around the axis of the rotating cylinder (6) and partially located in the bottom of the storage tank (5). Multiple top stirring blades (10) are arranged in a circle around the axis of the rotating cylinder (6) and do not interfere with the passage hole (9). The circumference diameter of the ends of the multiple top stirring blades (10) away from the outer wall of the rotating cylinder (6) is greater than the distance between the two pressure caps (4). The vertical height between the top stirring blades (10) and the pressure caps (4) is less than the depth of the rotating cylinder (6) inserted into the bottom of the accumulation tank (5). By rotating the sealing bolt (7), the top stirring blades (10) rotate with the rotating cylinder (6) and cause impurities to flow through the passage hole (9) and out of the valve body (1). ​ 2. A wedge gate valve for easy impurity removal according to claim 1, characterized in that: The outer wall of the rotating drum (6) is also provided with a plurality of bottom stirring blades (11) that are circumferentially distributed around the axis of the rotating drum (6) and do not interfere with the passage hole (9). The height of the plurality of bottom stirring blades (11) is lower than the height of the top stirring blades (10). The plurality of bottom stirring blades (11) and the plurality of top stirring blades (10) are alternately arranged in the circumferential direction centered on the axis of the rotating drum (6).

3. A wedge gate valve for easy impurity removal according to claim 2, characterized in that: The multiple bottom stirring blades (11) and multiple top stirring blades (10) are all inclined relative to the axis of the rotating drum (6).

4. A wedge gate valve for easy impurity removal according to claim 2 or 3, characterized in that: The multiple bottom stirring blades (11) and multiple top stirring blades (10) are all curved.

Images