Wedge gate valve convenient to clean

Abstract

According to the technical scheme, the wedge gate valve convenient to clean is characterized by comprising a valve body, a gate valve seat and a valve deck, the valve body is provided with a deposition groove and a cover hole, the cover hole comprises a discharging hole and a driving hole, the overall size of an orifice of the discharging hole is smaller than that of an orifice of the driving hole, and the discharging hole is communicated with the deposition groove; the lower valve cover comprises a connecting part, a driving part located in the driving hole and a sealing part matched with the blanking hole, the driving part is rotationally connected with a transmission shaft, the two ends of the transmission shaft are provided with a main gear located outside the driving part and a driving bevel gear located in the driving part respectively, and a rotating shaft is arranged in the center of the sealing part; one end of the rotating shaft penetrates into the driving part and is provided with a driven bevel gear in transmission connection with the driving bevel gear, the other end of the rotating shaft extends into the deposition tank and is provided with a plurality of stirring pieces located on the outer wall of the rotating shaft, and the inner wall of the driving hole is provided with a rack which is meshed with the main gear and extends in the axis direction of the driving hole; the problem that impurities are difficult to clean in the prior art is solved.

Description

Technical Field

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

[0002] Wedge gate valves are widely used in pipelines, where the flow of media is controlled by the movement of a gate driven by the valve stem. The gate of a wedge gate valve is inclined on both sides relative to the vertical plane. As impurities accumulate directly beneath the gate, it cannot descend fully, preventing the sealing surfaces on both sides of the gate from tightly fitting the valve seat, thus preventing the wedge gate valve from closing completely. Furthermore, the impurities accumulated beneath the gate become compacted and form relatively stable blocks under the pressure of the gate. In current technology, these impurities do not fall out of the valve body after the lower valve cover is opened, requiring maintenance personnel to break them up with tools. This not only increases the complexity of maintenance but also increases the risk of damage to the gate and other components. Utility Model Content

[0003] 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 and can ensure the structural stability of related components.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wedge gate valve that is easy to clean, comprising a valve body, a gate plate located within the valve body, a valve seat capable of forming a hard seal with the gate plate, and a lower valve cover located directly below the gate plate. The valve body is provided with a sedimentation groove located between the gate plate and the lower valve cover, and a cover hole through which the lower valve cover passes and communicates with the sedimentation groove. The cover hole includes a discharge hole and a drive hole coaxially arranged. The orifice profile of the discharge hole is smaller than that of the drive hole, and the discharge hole communicates with the sedimentation groove. The lower valve cover includes a connecting part fixedly connected to the outer wall of the valve body, a drive part located within the drive hole, and a sealing part matching the discharge hole. The drive part rotates... A drive shaft located on a horizontal plane is connected to the sealing part. At both ends of the drive shaft are a main gear located outside the drive unit and a driving bevel gear located inside the drive unit, respectively. A rotating shaft extending along the length of the sealing part is located at the center of the sealing part. One end of the rotating shaft passes through the drive unit and is equipped with a driven bevel gear that is connected to the driving bevel gear. The other end of the rotating shaft extends into the sedimentation tank and is equipped with multiple sets of stirring elements located on the outer wall of the rotating shaft. A rack is provided on the inner wall of the drive hole that meshes with the main gear and extends along the axis of the drive hole. Through the transmission between the main gear and the rack, the driving bevel gear and the driven bevel gear are driven to rotate, thereby driving the rotating shaft and multiple sets of stirring elements to rotate relative to the lower valve cover.

[0005] As a further improvement of this utility model, multiple sets of the stirring components are distributed along the length of the rotating shaft, and adjacent sets of the stirring components are misaligned in the circumferential direction of the rotating shaft.

[0006] As a further improvement of this utility model, the cross-section of the stirring element along its length is elliptical.

[0007] As a further improvement of this utility model, a protrusion is provided on the outer wall of the drive unit that is parallel to the outer wall of the main gear, and a sliding groove is provided on the inner wall of the drive hole that is parallel to the axis of the drive hole and allows the protrusion to move linearly.

[0008] As a further improvement of this utility model, a plurality of outer sealing rings are provided on the outer wall of the sealing part, which are distributed along the axial direction of the sealing part and fit against the inner wall of the material discharge hole.

[0009] As a further improvement of this utility model, a plurality of inner sealing rings are provided on the inner wall of the sealing part, which are distributed along the axial direction of the sealing part and fit against the outer wall of the rotating shaft.

[0010] The beneficial effects of this utility model are as follows: the main gear and rack drive cause the active bevel gear and the driven bevel gear to drive the rotating shaft and multiple sets of stirring components to rotate relative to the lower valve cover. Compared with the prior art, this design can stir and carry away impurities while removing the lower valve cover, effectively preventing impurities from forming lumps that are difficult to clean, improving maintenance efficiency, and also avoiding the phenomenon of maintenance personnel bumping into the relevant parts inside the valve body 1 during maintenance, ensuring the structural stability of the relevant parts. Attached Figure Description

[0011] Figure 1 This is a front sectional view of the present invention;

[0012] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0013] Figure 3 for Figure 2 A three-dimensional schematic diagram;

[0014] Figure 4 for Figure 3 Exploded view;

[0015] Figure 5 This is a perspective view of the lower valve cover in this utility model.

[0016] Reference numerals: 1. Valve body; 2. Gate; 3. Valve seat; 4. Lower valve cover; 40. Protrusion; 41. Connecting part; 42. Driving part; 43. Sealing part; 44. Drive shaft; 45. Main gear; 46. Driving bevel gear; 47. Rotating shaft; 48. Driven bevel gear; 49. Agitator; 5. Sedimentation tank; 6. Cover hole; 61. Discharge hole; 62. Driving hole; 63. Rack; 64. Sliding groove; 7. Outer sealing ring; 8. Inner sealing ring. Detailed Implementation

[0017] 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.

[0018] Reference Figures 1 to 5 As shown, a wedge gate valve that is easy to clean in this embodiment includes a valve body 1, a gate 2 located inside the valve body 1, a valve seat 3 that can form a hard seal with the gate 2, and a lower valve cover 4 located directly below the gate 2. The valve body 1 is provided with a sedimentation groove 5 located between the gate 2 and the lower valve cover 4 and a cover hole 6 for the lower valve cover 4 to pass through and communicate with the sedimentation groove 5.

[0019] Based on the aforementioned prior art, the existing cylindrical cover hole 6 is further processed by milling the cover hole 6 from the outside of the valve body 1 to the inside of the valve body 1 to form a drive hole 62 of a certain depth. The unmilled part is the material drop hole 61 that is connected to the sedimentation tank 5. The inner cavity contour size of the drive hole 62 is larger than the inner cavity contour size of the material drop hole 61, and the length of the drive hole 62 is larger than the length of the material drop hole 61. A rack 63 is fixedly connected to the inner wall of the drive hole 62, and the length direction of the rack 63 is perpendicular to the horizontal plane.

[0020] The lower valve cover 4 includes a connecting part 41, a driving part 42, and a sealing part 43 arranged coaxially. The outline dimension of the connecting part 41 is larger than the outline dimension of the opening of the driving hole 62 and can be fixedly connected to the outer wall of the valve body 1 by bolts. The sealing part 43 matches the material discharge hole 61. The driving part 42 is accommodated in the driving hole 62. In the processing and assembly process, the driving part 42 includes a main body integrally formed with the connecting part 41 and a cover integrally formed with the sealing part 43. The facing surfaces of the cover and the main body are provided with an inner cavity located at the center and a shaft groove connected to the inner cavity and extending along the diameter direction of the sealing part 43. The center of the sealing part 43 is provided with a through hole for the rotating shaft 47 to pass through. The through hole communicates with the inner cavity of the cover. The bottom of the inner cavity of the main body is provided with an end groove for one end of the rotating shaft 47 to be accommodated. One end of the drive shaft 44 is integrally formed with a driving bevel gear 46, and the other end is fixedly sleeved with a main gear 45 by a key connection or a nut limit. The main gear 45 and the driving bevel gear 46 are connected by a key connection or a nut limit. The distance between the shafts is greater than or equal to the length of the shaft groove. The drive shaft 44 is placed in the shaft groove of the main body. The main gear 45 and the driving bevel gear 46 are located outside the main body and inside the main body, respectively. The driven bevel gear 48 is fixedly sleeved on the outside of the rotating shaft 47. One end of the rotating shaft 47 is inserted into the end groove of the main body, and the driven bevel gear 48 meshes with the driving bevel gear 46. Then, the cover is placed on the main body, and the rotating shaft 47 passes through the through hole of the cover until the cover and the main body are in place. Bolts are used to connect them. The main body and the cover are screwed into the drive unit 42 together, and the drive shaft 44 can rotate relative to the drive unit 42. The driven bevel gear 48 and the driving bevel gear 46 are both located in the inner cavity of the drive unit 42. One end of the rotating shaft 47 passes through the sealing part 43 and multiple sets of stirring elements 49 are fixedly connected to the end of the rotating shaft 47. The number of stirring elements 49 in each set can be three and they are distributed along the circumferential direction of the rotating shaft 47. The multiple sets of stirring elements 49 are distributed along the length direction of the rotating shaft 47.

[0021] In actual use, the lower valve cover 4 is pushed into the cover hole 6 from bottom to top. The main gear 45 meshes with the rack 63 and moves along the length of the rack 63 until the connecting part 41 touches the outer wall of the valve body 1. The lower valve cover 4 is fixed to the valve body 1 by bolts passing through the connecting part 41 and screwing them into the valve body 1. Multiple sets of stirring components 49 are located in the sedimentation tank 5. The highest end of the main gear 45 and the rack 63 are adjacent. The sealing part 43 cooperates with the discharge hole 61. The driving part 42 is located in the driving hole 62. As impurities accumulate in the sedimentation tank 5, multiple sets of stirring components 49 are buried in the impurities until the gate plate 2 can no longer form a hard seal with the valve seat 3. Then, the bolts connecting the connecting part 41 to the valve body 1 are removed. Then, a downward pulling force is applied to the connecting part 41, and the lower valve cover 4 gradually moves downward out of the cover hole 6. The main gear 45 and the rack 63 drive each other, and the drive shaft 44 is relative to the driving part 4. 2. Rotation: The active bevel gear 46 drives the driven bevel gear 48 to rotate. The driven bevel gear 48 drives the rotating shaft 47 and multiple sets of stirring components 49 to rotate relative to the drive unit 42. As the multiple sets of stirring components 49 rotate, they also move downward along with the lower valve cover 4. Thus, impurities can be crushed by the multiple sets of stirring components 49 and fall downward. Impurities in the sedimentation tank 5 gradually move into the discharge hole 61. When the drive unit 42 exits the drive hole 62, the main gear 45 separates from the rack 63, and the multiple sets of stirring components 49 stop rotating. Impurities fall out of the valve body 1 through the drive hole 62. Finally, after the lower valve cover 4 is completely removed from the cover hole 6, most of the impurities fall out of the valve body 1. Then, water is used to rinse the inner wall of the discharge hole 61 so that the remaining small amount of impurities are also cleaned. Water is used to clean the multiple sets of stirring components 49. After cleaning, the lower valve cover 4 is reinstalled in the cover hole 6 for the next impurity discharge.

[0022] Compared with existing technologies, this design can stir and carry away impurities downwards while removing the lower valve cover 4, effectively preventing impurities from forming lumps that are difficult to clean, thus improving maintenance efficiency. It also avoids the phenomenon of maintenance personnel bumping into related parts inside the valve body 1 during maintenance, ensuring the structural stability of related parts.

[0023] As one specific implementation method of the improvement, refer to Figures 3 to 5 As shown, the two adjacent sets of stirring pieces 49 are rotated relative to each other in the circumferential direction of the rotating shaft 47 and staggered. This design can effectively improve the stirring efficiency and accelerate the loosening of impurities.

[0024] As one specific implementation method of the improvement, refer to Figures 3 to 5 As shown, the cross-section of the stirring element 49 along its length is elliptical and its major axis is parallel to the horizontal plane. This design, compared to the cuboid design of the stirring element 49, can reduce the resistance force of impurities on the stirring element 49, thereby improving the smoothness of the movement of the stirring element 49 and the stirring efficiency.

[0025] As an improved specific implementation, because there is a gap between the drive hole 62 and the drive part 42, the drive part 42 will move within the drive hole 62, which can easily cause the main gear 45 and the rack 63 to loosen, resulting in a decrease in transmission efficiency. To solve the aforementioned problem, refer to Figure 2 , Figure 4 and Figure 5 As shown, a protrusion 40 is integrally formed on the outer wall of the drive unit 42, which is parallel to the outer wall of the main gear 45. A sliding groove 64 is milled on the inner wall of the drive hole 62, which is parallel to the axis of the drive hole 62 and allows the protrusion 40 to move linearly. The width of the protrusion 40 matches the width of the sliding groove 64. The design of the protrusion 40 moving linearly along the sliding groove 64 can ensure stable meshing between the main gear 45 and the rack 63 and high transmission efficiency.

[0026] As one specific implementation method of the improvement, refer to Figure 2 , Figure 4 and Figure 5 As shown, multiple outer sealing rings 7 are provided on the outer wall of the sealing part 43, which are distributed along the axial direction of the sealing part 43 and fit against the inner wall of the discharge hole 61. This design can improve the sealing performance between the sealing part 43 and the discharge hole 61 and prevent media leakage.

[0027] As one specific implementation method of the improvement, refer to Figure 2 and Figure 4 As shown, multiple inner sealing rings 8 are provided on the inner wall of the sealing part 43, which are distributed along the axial direction of the sealing part 43 and fit against the outer wall of the rotating shaft 47. This design can improve the sealing performance between the sealing part 43 and the rotating shaft 47, avoid media leakage, and prevent the media from affecting the transmission of the driving bevel gear 46 and the driven bevel gear 48.

[0028] The above are merely preferred embodiments 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 within its protection scope. 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 its protection scope.

Claims

1. A wedge gate valve that is easy to clean, comprising a valve body (1), a gate (2) located within the valve body (1), a valve seat (3) capable of forming a hard seal with the gate (2), and a lower valve cover (4) located directly below the gate (2), wherein the valve body (1) is provided with a sedimentation groove (5) located between the gate (2) and the lower valve cover (4) and a cover hole (6) through which the lower valve cover (4) passes and communicates with the sedimentation groove (5), characterized in that: The cover hole (6) includes a discharge hole (61) and a drive hole (62) arranged coaxially. The orifice profile of the discharge hole (61) is smaller than that of the drive hole (62), and the discharge hole (61) is connected to the sedimentation tank (5). The lower valve cover (4) includes a connecting part (41) fixedly connected to the outer wall of the valve body (1), a drive part (42) located in the drive hole (62), and a sealing part (43) matching the discharge hole (61). The drive part (42) is rotatably connected to a transmission shaft (44) located on a horizontal plane. The two ends of the transmission shaft (44) are respectively provided with a main gear (45) located outside the drive part (42) and a driving bevel gear (46) located inside the drive part (42). The sealing part (43) A rotating shaft (47) extending along the length of the sealing part (43) is provided at the center. One end of the rotating shaft (47) passes through the drive part (42) and is provided with a driven bevel gear (48) that is connected to the driving bevel gear (46). The other end of the rotating shaft (47) extends into the sedimentation tank (5) and is provided with multiple sets of stirring elements (49) located on the outer wall of the rotating shaft (47). A rack (63) that meshes with the main gear (45) and extends along the axis of the drive hole (62) is provided on the inner wall of the drive hole (62). The driving bevel gear (46) and the driven bevel gear (48) are driven by the transmission between the main gear (45) and the rack (63), thereby driving the rotating shaft (47) and the multiple sets of stirring elements (49) to rotate relative to the lower valve cover (4).

2. The wedge gate valve for easy cleaning according to claim 1, characterized in that: Multiple sets of the stirring components (49) are distributed along the length of the rotating shaft (47), and adjacent sets of the stirring components (49) are misaligned in the circumferential direction of the rotating shaft (47).

3. A wedge gate valve for easy cleaning according to claim 1 or 2, characterized in that: The cross-section of the stirring element (49) along its length is elliptical.

4. A wedge gate valve for easy cleaning according to claim 1 or 2, characterized in that: The drive unit (42) has a protrusion (40) on its outer wall parallel to the outer wall of the main gear (45), and the drive hole (62) has a sliding groove (64) on its inner wall that is parallel to the axis of the drive hole (62) and allows the protrusion (40) to move linearly.

5. A wedge gate valve for easy cleaning according to claim 1 or 2, characterized in that: The outer wall of the sealing part (43) is provided with a plurality of outer sealing rings (7) distributed along the axial direction of the sealing part (43) and fitting against the inner wall of the material discharge hole (61).

6. A wedge gate valve for easy cleaning according to claim 1 or 2, characterized in that: The inner wall of the sealing part (43) is provided with a plurality of inner sealing rings (8) distributed along the axial direction of the sealing part (43) and in contact with the outer wall of the rotating shaft (47).

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