Vertical gate valve positioning device and vertical gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a valve plate positioning device of a vertical gate valve and the vertical gate valve. The valve plate positioning device of the vertical gate valve comprises a limiting baffle and an adjusting part, the limiting baffle is arranged on a moving path of a valve rod hanging bracket, the adjusting part is provided with a first connecting end and a second connecting end, the first connecting end is connected to the limiting baffle, and the second connecting end is connected to the limiting baffle. The second connecting end is used for being connected to a valve body of the vertical gate valve, the adjusting part comprises a plurality of adjusting pieces, the adjusting pieces are connected to the plate face of the limiting baffle in an array mode, and the adjusting pieces are used for adjusting the distance between the limiting baffle and the valve body. According to the technical scheme, precise mechanical limiting is achieved through the valve rod hanging bracket, and the situation that a valve plate of the chain transmission wedge-shaped gate valve is closed excessively and stuck is prevented.

Description

Technical Field

[0001] This disclosure relates to the field of valve technology, and in particular to a valve plate positioning device for a vertical gate valve and the vertical gate valve itself. Background Technology

[0002] In blast furnace hot blast stove systems, vertical gate valves with wedge-shaped valve plates are commonly used to isolate the pipeline medium. The wedge-shaped valve plate is connected to the transmission mechanism via a valve stem hanger. During valve closing, a common problem arises where the transmission mechanism continues to operate after the valve plate has fully closed, causing the valve stem to over-close and jam between the wedge-shaped valve plate and the valve body sealing groove, preventing the valve from opening properly. This is because the transmission mechanism cannot achieve precise positioning of the valve stem, and the electrical switch limit control exhibits lag, making it impossible to achieve precise valve stem positioning through the transmission mechanism and valve limit switches. Utility Model Content

[0003] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, in a first aspect of this disclosure, a valve plate positioning device for a vertical gate valve is provided, comprising a limiting baffle and an adjusting part. The limiting baffle is disposed on the moving path of a valve stem hanger and is used to limit the moving distance of the valve stem hanger. The adjusting part has a first connecting end and a second connecting end. The first connecting end is connected to the limiting baffle, and the second connecting end is used to connect to the valve body of the vertical gate valve. The adjusting part includes a plurality of adjusting members, which are arrayed and connected to the plate surface of the limiting baffle. The adjusting members are used to adjust the distance of the limiting baffle relative to the valve body.

[0005] In one feasible implementation, the limiting baffle includes a first baffle and a second baffle, with a valve stem clearance space provided between the first baffle and the second baffle, and both the first baffle and the second baffle are provided with two adjusting members, which are spaced apart along the extending direction of the first baffle and the second baffle.

[0006] In one feasible implementation, the adjusting member includes a left-hand screw, a right-hand screw, and left and right helical fasteners. One end of the left-hand screw and the right-hand screw are connected to the left and right helical fasteners. The left-hand screws of multiple adjusting members are arranged on the same side, and the left-hand screw or the right-hand screw is connected to the limiting baffle.

[0007] In one feasible implementation, the limiting baffle is rectangular and has a valve stem clearance hole.

[0008] In one feasible implementation, the adjusting member is configured as a telescopic mechanism, and the telescopic end of the adjusting member is connected to the limiting baffle.

[0009] In one feasible implementation, the number of the adjusting elements is set to four.

[0010] In one feasible implementation, the adjusting component includes a connecting rod and a linear stepper motor. One end of the connecting rod is connected to the limiting baffle, and the other end is connected to the output end of the linear stepper motor. The linear stepper motor moves in the direction of the valve stem hanger.

[0011] In one feasible implementation, a shock-absorbing pad is provided between the adjusting member and the limiting baffle.

[0012] In one feasible implementation, a buffer pad is provided on the side of the limiting baffle facing the valve stem hanger, the buffer pad being used to reduce the force exerted by the valve stem hanger on the limiting baffle.

[0013] A second aspect of this disclosure provides a vertical gate valve, including the valve plate positioning device of the vertical gate valve described above.

[0014] Compared with the prior art, this disclosure has at least the following beneficial effects: The limiting baffle of this disclosure is set on the moving path of the valve stem hanger to limit the moving distance of the valve stem hanger. When the valve stem hanger descends to the preset position, it abuts against the limiting baffle to prevent the valve plate of the chain-driven wedge gate valve from over-closing and getting stuck. The valve plate is in the optimal closed position under the valve stem hanger stroke limited by the limiting baffle. The adjusting components are connected in an array to the plate surface of the limiting baffle to adjust the distance of the limiting baffle relative to the valve body, thereby ensuring the adjustment of the inclination angle of the limiting baffle plate surface and / or the adjustment of the plate surface's position on the moving path of the valve stem hanger, so that the valve stem hanger achieves precise mechanical limiting. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 This is one of the structural schematic diagrams of a vertical gate valve as disclosed herein;

[0019] Figure 2 This is the second schematic diagram of the structure of the vertical gate valve disclosed herein;

[0020] Figure 3 For this disclosure Figure 2 A magnified structural diagram of part A in the middle.

[0021] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0022] 100 - Valve stem hanger; 200 - Valve body; 300 - Valve plate;

[0023] 1-Limit baffle; 11-First baffle; 12-Second baffle; 13-Valve stem clearance space; 2-Adjusting part; 21-Adjusting component; 211-Left-hand screw; 212-Right-hand screw; 213-Left and right spiral buckle body; 214-Locking nut. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0025] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0026] Currently, in chain-driven wedge gate valves, when the valve plate closes, the hydraulic cylinder piston rod extends, and the valve plate closes the valve by its own weight. After the valve plate is closed, due to inertia, the hydraulic cylinder piston rod is still extended. When the lower chain is under force, the valve plate will get stuck during the continued downward movement of the valve rod. Secondly, if the valve plate closes too quickly, it will cause the valve plate to jam with the wedge mechanism of the valve body when the valve plate is closed.

[0027] Based on this, this disclosure provides a valve plate positioning device for a vertical gate valve. The limiting baffle of this disclosure is set on the moving path of the valve stem hanger to limit the moving distance of the valve stem hanger. When the valve stem hanger descends to a preset position, it abuts against the limiting baffle to prevent the valve plate of the chain-driven wedge gate valve from over-closing and getting stuck. The valve plate is in the optimal closed position after the valve stem hanger has been limited by the limiting baffle. The adjusting components are connected in an array to the plate surface of the limiting baffle to adjust the distance between the limiting baffle and the valve body, thereby ensuring the adjustment of the inclination angle of the limiting baffle plate surface and / or the adjustment of the plate surface's position on the moving path of the valve stem hanger, so that the valve stem hanger can achieve precise mechanical limiting.

[0028] The valve plate positioning device of this vertical gate valve will be described in detail below through specific embodiments:

[0029] Reference Figures 1 to 3 As shown, a valve plate positioning device for a vertical gate valve is provided in the first aspect of this disclosure, including a limiting baffle 1 and an adjusting part 2. The limiting baffle 1 is disposed on the moving path of the valve stem hanger 3 3 and is used to limit the moving distance of the valve stem hanger 3 3. The adjusting part 2 has a first connecting end and a second connecting end. The first connecting end is connected to the limiting baffle 1 and the second connecting end is used to connect to the valve body 200 of the vertical gate valve. The adjusting part 2 includes a plurality of adjusting members 21, which are arrayed and connected to the plate surface of the limiting baffle 1. The adjusting members 21 are used to adjust the distance between the limiting baffle 1 and the valve body 200.

[0030] The limiting baffle 1 disclosed herein is disposed on the moving path of the valve stem hanger 3 to limit the moving distance of the valve stem hanger 3. When the valve stem hanger 3 descends to a preset position, it abuts against the limiting baffle 3 to prevent the valve plate 300 of the chain-driven wedge gate valve from over-closing and getting stuck. That is, under the stroke of the valve stem hanger 3 after being limited by the limiting baffle 1, the position of the valve plate 300 is the optimal closed position. The adjusting members 21 are connected in an array to the plate surface of the limiting baffle 1 to adjust the distance of the limiting baffle 1 relative to the valve body 200, thereby ensuring the adjustment of the inclination angle of the plate surface of the limiting baffle 1 and / or the adjustment of the plate surface's position on the moving path of the valve stem hanger 3, so that the valve stem hanger achieves precise mechanical limiting.

[0031] Specifically, the adjusting component of this disclosure can be a telescopic mechanism such as a telescopic hydraulic cylinder or a telescopic pneumatic cylinder, or it can be a threaded structure composed of a bolt sleeve and a bolt post. The first connecting end of the adjusting part 2 can be the output end or non-output end of the adjusting component 21 directly connected to the limiting baffle, or it can be connected to the limiting baffle 1 through a connecting component, such as a mounting plate or mounting bracket, to achieve buffering when the valve stem hanger 3 contacts the limiting baffle 1. The other end of the adjusting component 21 is connected to the valve body 200, which can be directly connected to the body of the valve body 200 or connected to the crossbeam of the valve body 200. The specific connection position is selected according to the valve model. With long-term use, the closing conditions and state of the valve plate 300 will change to some extent. At this time, the angle or height of the limiting baffle 1 relative to the valve body 200 can be adjusted by adjusting the adjusting component 21.

[0032] In some embodiments, the limiting baffle of this disclosure includes a first baffle 11 and a second baffle 12, with a valve stem clearance space 13 provided between the first baffle 11 and the second baffle 12, and both the first baffle 11 and the second baffle 12 are provided with two adjusting members, which are spaced apart along the extending direction of the first baffle 11 and the second baffle 12.

[0033] In this embodiment, the limiting baffle of this disclosure includes a first baffle 11 and a second baffle 12, wherein the first baffle 11 and the second baffle 12 are arranged parallel to each other on the moving path of the valve stem hanger 3, and the extending directions of the first baffle 11 and the second baffle 12 are perpendicular to the moving direction of the valve stem hanger 3, so as to ensure the contact surface between the limiting baffle 1 and the valve stem hanger 3. Specifically, the first baffle 11 and the second baffle 12 can be elongated plates, and a valve stem clearance space 13 is set between them. The valve stem is set in the valve stem clearance space 13 to ensure that the up and down movement of the valve stem is not interfered with by the limiting baffle 1. Moreover, the first baffle 11 and the second baffle 12 are each provided with two adjusting members, which are spaced apart along the extending directions of the first baffle 11 and the second baffle 12 to ensure the stability of the limiting baffle 1. Furthermore, in this embodiment, the limiting baffle 1 can be hinged to the adjusting member 21, allowing the two adjusting members 21 to adjust the tilt angle of the limiting baffle 1 surface to ensure adaptability to the irregular bottom surface of the valve stem hanger 3. In this embodiment, the contact surface between the limiting baffle 1 and the valve stem hanger 3 is selected as a plane.

[0034] In some embodiments, the adjusting member 21 includes a left-hand screw 211, a right-hand screw 212, and left and right spiral buckles 213. One end of the left-hand screw 211 and the right-hand screw 212 is connected to the left and right spiral buckles 213. The left-hand screws 211 of the multiple adjusting members 21 are arranged on the same side, and the left-hand screw 211 or the right-hand screw 212 is connected to the limiting baffle 1.

[0035] In this embodiment, the adjusting component 21 of this disclosure includes a left-handed screw 211, a right-handed screw 212, and left and right helical fasteners 213. The design of the left-handed and right-handed screws effectively prevents the nut from loosening. Due to prolonged mechanical movement or air corrosion, the bolt and nut may gradually loosen, and the nut may rotate in the opposite direction until it falls off. The left-handed screw 211 and the right-handed screw 212 ensure that the nut is subjected to a reverse force when it loosens, counteracting its rotational force and thus preventing the nut from falling off. The left and right helical fasteners 213 make the assembly process more convenient. Tightening and adjustment can be completed through simple left and right rotation operations, greatly improving work efficiency.

[0036] In some embodiments, the limiting baffle 1 is rectangular, and the limiting baffle 1 is provided with a valve stem clearance hole.

[0037] In this embodiment, the limiting baffle 1 is rectangular, and its surface abuts against the valve stem hanger 3, with the valve stem passing through the valve stem clearance hole. Furthermore, to facilitate the installation of the limiting baffle 1 and the valve stem, the limiting baffle 1 can be configured as a split structure, with half of the valve stem clearance hole located on the connecting edge of the two limiting baffles 1, forming a complete valve stem clearance hole when the two limiting baffles 1 are joined together.

[0038] In some embodiments, the adjusting member 21 is configured as a telescopic mechanism, and the telescopic end of the adjusting member 21 is connected to the limiting baffle 1.

[0039] In this embodiment, the adjusting member 21 is configured as a telescopic mechanism, and the telescopic end of the adjusting member 21 is connected to the limiting baffle 1. Specifically, an electric telescopic rod can be selected to facilitate automated adjustment. Furthermore, the number of adjusting members 21 is set to four to ensure the stability of the limiting baffle 1.

[0040] In some embodiments, the adjusting member 21 includes a connecting rod and a linear stepper motor. One end of the connecting rod is connected to the limiting baffle 1, and the other end is connected to the output end of the linear stepper motor. The linear stepper motor moves in the direction of the valve stem hanger 100.

[0041] In this embodiment, the adjusting component 21 includes a connecting rod and a linear stepper motor. One end of the connecting rod is connected to the limiting baffle 1, and the other end is connected to the output end of the linear stepper motor. The linear stepper motor moves towards the valve stem hanger 100. The linear stepper motor eliminates the need for intermediate transmission links, directly converting electrical energy into linear motion mechanical energy, thus improving energy conversion efficiency and significantly reducing energy consumption. Furthermore, the high-precision positioning and high-speed response characteristics of the linear stepper motor make its adjustment accuracy more precise. Due to the reduction of mechanical transmission components, such as lead screws, its dynamic response performance is greatly improved, resulting in a more sensitive and rapid response.

[0042] In some embodiments, a shock-absorbing pad is provided between the adjusting member 21 and the limiting baffle 1. The shock-absorbing pad can buffer the impact force when the valve stem hanger 3 abuts against the limiting baffle 1, thereby reducing noise during limiting and better protecting the adjusting member 21. The shock-absorbing pad disclosed herein can be a rubber shock-absorbing pad.

[0043] In some embodiments, a buffer pad is provided on the side of the limiting baffle 1 facing the valve stem hanger 100, and the buffer pad is used to reduce the force exerted by the valve stem hanger 100 on the limiting baffle 1.

[0044] In this embodiment, a buffer pad is provided on the side of the limiting baffle 1 facing the valve stem hanger 100. The buffer pad is used to reduce the force exerted by the valve stem hanger 100 on the limiting baffle 1. The buffer pad can be a polyethylene buffer pad, which has excellent corrosion resistance, chemical stability, and mechanical strength; a rubber buffer pad, such as natural rubber or butadiene rubber, which has excellent wear resistance, elasticity, and anti-aging properties, suitable for applications such as automobiles and fitness equipment, and can reduce shock, noise, and slip; or a silicone buffer pad, which has good high-temperature resistance, low-temperature resistance, weather resistance, and chemical stability, suitable for high-temperature environments or applications requiring wear resistance. This disclosure specifically uses a silicone buffer pad.

[0045] A second aspect of this disclosure provides a vertical gate valve, including the valve plate positioning device of the vertical gate valve provided in the first aspect of this disclosure.

[0046] In this disclosure, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0047] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0048] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A valve plate positioning device for a vertical gate valve, characterized by, The valve plate positioning device comprises a limiting baffle and an adjusting part, the limiting baffle is arranged on the moving path of the valve rod hanger and is used to limit the moving distance of the valve rod hanger, the adjusting part has a first connecting end and a second connecting end, the first connecting end is connected to the limiting baffle, and the second connecting end is used to be connected to the valve body of the vertical gate valve. The adjusting part comprises a plurality of adjusting members, the plurality of adjusting members are arranged in an array on the plate surface of the limiting baffle, and the adjusting members are used to adjust the distance between the limiting baffle and the valve body.

2. The valve disc positioning device for a vertical gate valve according to claim 1, characterized in that, The limiting baffle comprises a first baffle and a second baffle, a valve rod space is arranged between the first baffle and the second baffle, and the first baffle and the second baffle are both provided with two adjusting members, and the adjusting members are arranged at intervals along the extension direction of the first baffle and the second baffle.

3. The valve disc positioning device for a vertical gate valve according to claim 2, wherein The adjusting member comprises a left-handed screw, a right-handed screw and a left-right screw buckle body, one end of the left-handed screw and the right-handed screw is connected to the left-right screw buckle body, the left-handed screws of the plurality of adjusting members are arranged on the same side, and the left-handed screw or the right-handed screw is connected to the limiting baffle.

4. The valve disc positioning device for a vertical gate valve according to claim 1, wherein The limiting baffle is arranged in a rectangular shape, and the limiting baffle is provided with a valve rod clearance hole.

5. The valve disc positioning device for a vertical gate valve according to claim 1, wherein The adjusting member is arranged as an extension mechanism, and the extension end of the adjusting member is connected to the limiting baffle.

6. The valve disc positioning device for a vertical gate valve according to claim 5, wherein The number of the adjusting members is four.

7. The valve disc positioning device for a vertical gate valve according to claim 1, wherein The adjusting member comprises a connecting rod and a linear stepper motor, one end of the connecting rod is connected to the limiting baffle, the opposite end is connected to the output end of the linear stepper motor, and the movement direction of the linear stepper motor is towards the valve rod hanger.

8. The valve disc positioning device for a vertical gate valve according to claim 1, wherein A damping pad is arranged between the adjusting member and the limiting baffle.

9. The valve disc positioning device for a vertical gate valve according to any one of claims 1 to 8, characterized in that, A buffer pad is arranged on the side of the limiting baffle facing the valve rod hanger, and the buffer pad is used to reduce the acting force applied by the valve rod hanger to the limiting baffle.

10. A vertical gate valve characterized by The valve plate positioning device comprises the vertical gate valve of any one of the preceding claims 1 to 9.

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