Simple sealing gate valve

Abstract

The utility model discloses a simple sealing gate valve which comprises a valve body, a gate plate and a valve rod with a driving structure, the gate plate comprises two plate bodies which move relatively, a guide plate is arranged on the inner side of the valve body, the plate bodies are provided with guide blocks which slide along the guide plate corresponding to the guide plate, and a guide shaft for the plate bodies is further arranged between the plate bodies; according to the simple sealing gate valve, the double-face sealing plate body structure is arranged to be matched with the sealing seat, the double-face sealing and double-sealing effects are achieved, the improved relative movable plate body structure is arranged so that the sealing gate valve can be driven by downward pressing of the transition gate plate and driving of the inclined guide plate in the sealing process, and the two plates can be relatively far away from and abut against the sealing seat; in addition, according to the gate valve, the inclined guide plate is used for abutting pressure and thrust to enable sealing force to evenly act on the inclined face matched edge, and the problem that the middle of an existing gate plate applies pressure to the two sides, and consequently the gate plate is prone to deflection is solved.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to a simple sealing gate valve. Background Technology

[0002] Gate valves, as key components in fluid control systems, achieve full opening or full closing control of fluid flow through a vertically moving gate. Although they cannot be used for flow regulation, they employ a wedge-shaped structure with a valve stem driving a rapid radial cutoff of the media passage for a sealing stroke. A typical structure includes a valve body, valve stem, gate, and actuator. The valve stem and gate linkage method is divided into two types: rising stem (valve stem rise and fall are visible) and non-rising stem.

[0003] To achieve better sealing, existing gate valves are typically designed with a sealing angle between the valve body and the gate. This allows for a downward thrust that creates a pressure seal on the inclined surface when the gate descends to cut off the seal. However, this design requires precise design of the sealing surface and careful attention to the aging and sealing failure of the sealing material. Furthermore, the seal relies entirely on the pressure from the valve stem in the middle. Under medium pressure, the pressure on both sides of the valve stem can easily cause deformation of the gate. Utility Model Content

[0004] In view of the prior art, the purpose of this utility model is to provide a sealing gate valve structure that improves the sealing effect by using a double sealing plate and a valve body guide drive to move relatively close to the sealing seat.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a simple sealing gate valve, including a valve body, a gate plate, and a valve stem with a driving structure. The gate plate is composed of two relatively movable plates. A guide plate is provided on the inner side of the valve body. A guide block is provided on the plate corresponding to the guide plate and slides along the guide plate. A guide shaft for the plate is also provided between the plates.

[0006] As a further feature of the above scheme, the valve stem is rotatably arranged relative to the valve body, and a spiral groove is provided on the outer side of the valve stem. The upper end of the gate plate is provided with an installation groove and a slider located in the installation groove. The valve stem and the inner hole of the slider are threadedly engaged to drive the slider to lift and lower the gate plate.

[0007] As a further feature of the above solution, the axial height of the mounting groove is greater than the thickness of the slider, and a pull arm is provided between the slider and the plate. One end of the pull arm is hinged to the slider, and the other end is slidably disposed in an obliquely arranged waist-shaped groove on the plate.

[0008] As a further feature of the above solution, the surfaces of the guide plate and the guide block that abut against each other are provided with inclined sliding grooves, the sliding grooves having arc-shaped bottoms, and the guide block having matching hemispherical sliding surfaces.

[0009] As a further feature of the above solution, the valve body is provided with a sealing seat with a sealing ring, and the gate plate is provided with a sealing plate that matches the sealing ring.

[0010] Beneficial effects: The simple sealing gate valve of this utility model achieves double-sided sealing and dual-sealing effects by setting a double-sided sealing plate structure and cooperating with the sealing seat. The improved relative movable plate structure allows it to be driven by the downward pressure of the transition gate plate and the inclined guide plate during sealing, so that the two plates move away from each other and abut against the sealing seat, thereby strengthening the sealing of the gate valve and obtaining a stronger cut-off sealing effect during use. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the sealing gate valve structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the internal structure of the gate valve in this embodiment.

[0013] Figure 3 This is a schematic diagram of the inside of the valve body in this embodiment.

[0014] Figure 4 This is a schematic diagram of the cooperation between the slider and the valve stem in this embodiment.

[0015] Figure 5 This is an example. Figure 4 Another schematic diagram of the gate, slider, and valve stem at point A.

[0016] Reference numerals: 1. Valve body; 11. Guide plate; 12. Sliding groove; 2. Gate; 21. Plate body; 22. Guide block; 23. Sliding block; 24. Mounting groove; 25. Pull arm; 26. Guide shaft; 27. Waist-shaped groove; 29. ​​Hemispherical sliding surface; 3. Drive structure; 4. Valve stem; 41. Helical groove; 5. Sealing seat; 51. Sealing ring; 52. Sealing plate. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0018] like Figure 1-5 The simple sealing gate valve shown includes a valve body 1, a gate 2 and a valve stem 4 with a drive structure 3. The gate 2 is composed of two relatively movable plates 21. The valve body 1 is provided with a guide plate 11 on its inner side. The plates 21 are provided with guide blocks 22 that slide along the guide plate 11. A guide shaft 26 for the plates 21 is also provided between the plates 21.

[0019] As a further feature of the above scheme, the valve stem 4 is rotatably mounted relative to the valve body 1, and the outer side of the valve stem 4 is also provided with a spiral groove 41. The upper end of the gate plate 2 is provided with a mounting groove 24 and a slider 23 located in the mounting groove 24. The valve stem 4 and the inner hole of the slider 23 are threadedly engaged to drive the slider 23 to move the gate plate 2 up and down. The axial height of the mounting groove 24 is greater than the thickness of the slider 23. A pull arm 25 is provided between the slider 23 and the plate 21. One end of the pull arm 25 is hinged to the slider 23, and the other end is slidably mounted in the waist-shaped groove 27 inclined on the plate 21.

[0020] As a further feature of the above scheme, the surfaces of the guide plate 11 and the guide block 22 that abut against each other are provided with inclined sliding grooves 12, the sliding grooves 12 having arcuate groove bottoms, and the guide block 22 having matching hemispherical sliding surfaces 29.

[0021] As a further provision of the above scheme, the valve body 1 is provided with a sealing seat 5 with a sealing ring 51, and the gate 2 is provided with a sealing plate 52 that matches the sealing ring 51.

[0022] Referring to this utility model Figure 1 As shown, the simple sealing gate valve of this embodiment includes a valve body 1, a gate 2, and a drive structure 3. Below the drive structure 3, there is also a valve stem 4 that passes through the upper end of the valve body 1 and enters the valve body 1 to connect with the gate 2. When the drive structure 3 drives the valve stem 4 to rotate, it can drive the gate 2 in the valve body 1 to move radially up and down relative to the medium flow channel of the valve body 1, thereby forming a shut-off valve and an open valve for the medium flow channel.

[0023] Based on the above structural setup, refer to Figure 2 The gate 2 shown in this embodiment comprises two relatively movable plates 21. Guide plates 11 are also provided on the inner walls of the valve bodies 1 on both sides of the gate 2. Each plate 21 has a guide block 22 that slides along the guide plate 11. It is worth noting that in this embodiment, the guide block 22 has two sides: firstly, the plates 21 move relative to the valve bodies 1, and rotation is prevented due to the limiting effect of the guide plates 11; secondly, [the guide block 22 is positioned to prevent rotation]. Figure 3 An inclined sliding groove 12 is provided on the surface of the guide plate 11 that abuts against the guide block 22. The sliding groove 12 has an arcuate bottom. That is, the sliding groove 12 is provided on the surfaces of the guide plate 11 that abut against the guide block 22 on both sides of the medium flow channel, and the bottom of the sliding groove 12 is provided with an arcuate groove. A hemispherical sliding surface 29 is provided on the guide block 22 corresponding to the size of the arcuate groove. Figure 2The hemispherical sliding surface 29, which is convex relative to the guide block 22, is oriented to slide within the sliding groove 12. Based on the inclined structure of the bottom of the guide plate 11 being thicker than the top, the two plates 21 will move relatively away from each other during the descent, thereby making the sealing between the plates 21 and the sealing seats 5 on both sides more tight.

[0024] Furthermore, in this embodiment, a guide shaft 26 for the plate 21 is also provided between the plate 21. The guide shaft 26 is a sleeve shaft of one large and one small size. That is, a smaller shaft is provided on one side of the plate 21, and a sleeve is provided on the other side. The two are sleeved together to provide a limit and guide for the relative closeness or distance between the two plate 21.

[0025] As a further feature of the above solution, in this embodiment, the valve stem 4 is rotatably mounted relative to the valve body 1. The outer side of the valve stem 4 is also provided with a spiral groove 41. The upper end of the gate plate 2 is provided with a mounting groove 24 and a slider 23 located in the mounting groove 24. The inner hole of the slider 23 is also provided with a protruding sliding column that slides in the spiral groove 41. The valve stem 4 and the inner hole of the slider 23 are threadedly engaged to drive the slider 23 to move the gate plate 2 up and down. That is, the valve stem 4 with the spiral groove 41 acts as a screw that drives the slider 23 to move the gate plate 2 fixed by the slider 23 along the axial direction of the valve stem 4.

[0026] In this embodiment, the axial height of the mounting groove 24 is greater than the thickness of the slider 23. A pull arm 25 is provided between the slider 23 and the plate 21. One end of the pull arm 25 is hinged to the slider 23, and the other end is slidably disposed within the inclined waist-shaped groove 27 on the plate 21. This structural arrangement, as shown in the example... Figure 4 and Figure 5 As shown, during use, the slider 23 is driven by the valve stem 4 to produce a lifting and lowering action. The rising and falling of the slider 23 not only drives the gate 2 composed of the two plates 21 to rise and fall through the contact between the upper and lower end faces, but also, based on the setting of the pull arm 25, when moving upward, as... Figure 4 As shown, the pull arm 25 moves upward along the waist-shaped groove 27 to the upper end as the slider 23 moves upward, thereby driving the two plates 21 to move closer together. Conversely, when the slider 23 moves downward, the valve stem 4 gives the slider 23 a downward pressure, which abuts against the bottom of the mounting groove 24. The pull arm 25 swings to both sides, providing the guide block 22 with the inclined sliding groove 12 based on the guide plate 11, and the two plates 21 are relatively far apart, resulting in the clearance stroke.

[0027] As described above, when the plate 21 is pressed down to seal and cut off, based on the inclined setting of the guide plate 11, the guide block 22 slides along the inclined guide plate 11, providing the two plates 21 with a further sealing abutment force to move towards the sealing seats 5 on both sides, thereby improving the sealing performance. When rising, the structure of the pull arm 25 allows the two plates 21 to move towards the center and rise smoothly.

[0028] Furthermore, the valve body 1 is provided with a sealing seat 5 with a sealing ring 51, and the gate 2 is provided with a sealing plate 52 that matches the sealing ring 51. As mentioned above, the pressure of the plate 21 on the sealing seat 5 comes from the guide plates 11 located on both sides of the edge of the plate 21. Under the continuous rotational force of the valve stem 4, the plate 21 will generate a continuous downward sealing pressure with strong sealing ability. The sealing plate 52 is larger than the sealing ring 51, which allows it to move excessively to seal. Based on the setting of the sealing seat 5 and the gate 2 with relative inclined surfaces, the greater the downward movement of the gate 2 driven by the valve stem 4, the stronger the sealing pressure. And based on the sealing holding, the slider 23 is located at the bottom of the mounting groove 24 and presses against the gate 2, avoiding loosening.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A simple sealing gate valve, comprising a valve body (1), a gate (2), and a valve stem (4) with a drive structure (3), characterized in that: The gate (2) consists of two relatively movable plates (21). The valve body (1) has a guide plate (11) on its inner side. The plate (21) is provided with a guide block (22) that slides along the guide plate (11) corresponding to the guide plate (11). The plate (21) is also provided with a guide shaft (26) between the plates (21) to limit the relative movement of the two plates (21) closer or further apart.

2. The simplified sealing gate valve according to claim 1, characterized in that: The valve stem (4) is rotatably arranged relative to the valve body (1). The outer side of the valve stem (4) is also provided with a spiral groove (41). The upper end of the gate (2) is provided with an installation groove (24) and a slider (23) located in the installation groove (24). The valve stem (4) and the inner hole of the slider (23) are threaded together to drive the slider (23) to drive the gate (2) to rise and fall.

3. A simple sealing gate valve according to claim 2, characterized in that: The axial height of the mounting groove (24) is greater than the thickness of the slider (23). A pull arm (25) is provided between the slider (23) and the plate (21). One end of the pull arm (25) is hinged to the slider (23), and the other end is slidably disposed in the waist-shaped groove (27) inclined on the plate (21).

4. A simple sealing gate valve according to claim 1, characterized in that: The guide plate (11) and the guide block (22) have an inclined sliding groove (12) on their respective contact surfaces. The sliding groove (12) has an arcuate groove bottom, and the guide block (22) has a matching hemispherical sliding surface (29).

5. A simple sealing gate valve according to claim 1, characterized in that: The valve body (1) is provided with a sealing seat (5) with a sealing ring (51), and the gate (2) is provided with a sealing plate (52) that matches the sealing ring (51).

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