Fastening equipment for reducing leakage of valve packing and valve
By using fastening equipment on the valve, through the design of tail plate and fastener, pressing the packing gland to fill the gap, the problem that valve leakage cannot be solved by replacing the packing in the short term, achieving the effect of effectively reducing leakage.
Patent Information
- Application Number
- CN202422137767.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In some cases, valve leakage cannot be solved in the short term by replacing the pack, resulting in the leakage problem that cannot be quickly eliminated.
A fastening device is provided, including a pressing mechanism, connecting the tail plate to the flange through a fastener, and pressing the other end of the tail plate downward on the filler gland, enhancing the downward pressure of the filler gland on the lower side of the filler gland, deformation of the filler and filling gaps, and improving leakage problems.
Through the use of fastening equipment, the leakage of valve packs can be effectively reduced in the short term without replacing the packs, solving the problem of the inability to quickly eliminate the leak.
Smart Images
Figure CN223019466U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a fastening device and a valve for reducing the leakage of valve packing. Background Technique
[0002] During the long-term process of adjusting the pipeline flow through a manual gate valve, the packing in the valve packing may have a filling gap due to long-term wear, medium erosion, temperature change, aging and other reasons, resulting in leakage at the packing. Usually, for a valve with leakage, the method of isolating this section of the system, discharging the medium inside the system and replacing the packing is adopted to solve the problem; however, when the system does not have the shutdown condition or the system cannot be isolated, the problem of valve leakage cannot be eliminated in the short term. Content of the Utility Model
[0003] Aiming at the technical problem that in some cases, the problem of valve leakage cannot be solved by replacing the packing, resulting in the inability to eliminate valve leakage in the short term, the utility model provides a fastening device and a valve for reducing the leakage of valve packing.
[0004] The technical solution of the utility model to solve the above technical problem is as follows:
[0005] On the one hand, the utility model provides a fastening device for reducing the leakage of valve packing, including at least one set of pressing mechanisms. The pressing mechanism includes a tail plate and at least one fastener connected to one end of the tail plate. The fastener is used to connect to the flange of the valve at the same time, so that the other end of the tail plate presses down on the packing gland of the valve.
[0006] The beneficial effect of the utility model is: when there is a leakage phenomenon, the tail plate is connected to the flange through the fastener, and the other end of the tail plate presses down on the packing gland. As the fastening of the fastener is enhanced, the downward pressure of the tail plate on the packing gland is enhanced, so that the packing gland presses down on the packing below it, and the packing deforms and fills the gap between it and the valve stem, so as to improve the technical problem that in some cases, the problem of valve leakage cannot be solved by replacing the packing, resulting in the inability to eliminate valve leakage in the short term.
[0007] On the basis of the above technical solution, the utility model can also be improved as follows.
[0008] Further, the fastener includes bolts, and at least two bolts are provided and are distributed at intervals at one end of the tail plate.
[0009] The beneficial effect of adopting the above further solution is: the tail plate and the flange are firmly connected by bolts to ensure the stable installation of the tail plate and form a stable downward pressure on the packing gland.
[0010] Further, the fastener further includes a pressing plate fixedly connected to one end of the tail plate at the lower end, and a pressing rod threadedly connected to the upper end of the pressing plate at the middle. The pressing rod is inclined and the lower end presses down on the other end of the tail plate.
[0011] The beneficial effect of adopting the above further solution is: by the rotation of the pressing rod, the other end of the tail plate is pressed down by the pressing rod to increase the downward pressure on the packing gland.
[0012] Further, a limiting plate is fixedly provided on the upper side of the other end of the tail plate, and the lower end of the pressing rod abuts against both the limiting plate and the tail plate at the same time.
[0013] The beneficial effect of adopting the above further solution is: to ensure a stable downward pressure of the pressing rod on the tail plate and prevent it from sliding relative to the tail plate.
[0014] Further, a support plate is fixedly provided on one side of the pressing plate. The support plate is inclined, with the upper end fixedly connected to the pressing plate and the lower end fixedly connected to the other end of the tail plate.
[0015] The beneficial effect of adopting the above further solution is: to form a supporting and pulling effect on the pressing plate through the support plate, maintain the vertical state of the pressing plate, provide stable support for the pressing rod, and realize stable downward pressure on the tail plate.
[0016] Further, a handle is fixedly provided at the upper end of the pressing rod.
[0017] The beneficial effect of adopting the above further solution is: to facilitate the rotation of the pressing rod through the handle.
[0018] Further, the end face of the other end of the tail plate is an arc surface structure.
[0019] The beneficial effect of adopting the above further solution is: the arc surface structure is adapted to the arc-shaped side surface of the valve stem to ensure a larger contact area between the end of the other end of the tail plate and the packing gland.
[0020] Further, at least two sets of the pressing mechanisms are provided, and each tail plate presses down on the packing gland of the valve at the same time.
[0021] The beneficial effect of adopting the above further solution is: to form a uniform and stable downward pressure on the packing gland through multiple tail plates.
[0022] Further, the fastening device further includes at least two arc plates. Each arc plate is arranged in a ring shape and presses down on the packing gland at the same time. Each tail plate presses down on the ring-shaped structure formed by each arc plate, and the gap between two adjacent arc plates is located on the lower side of the other end of the tail plate.
[0023] The beneficial effects of adopting the above further solution are as follows: Through the transmission of the annular arrangement structure formed by all the arc plates, it is ensured that the packing gland receives a uniform downward pressure.
[0024] On the other hand, the present utility model provides a valve, including the above-mentioned fastening device for reducing the leakage of valve packing. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 is the installation structure diagram of the fastening device of the present utility model;
[0026] Figure 2 is Figure 1 the partial enlarged view of
[0027] Figure 3 is Figure 2 the partial enlarged view from another perspective of
[0028] Figure 4 is the partial cross-sectional view of the gate valve in the related art.
[0029] In the drawings, the list of components represented by each reference numeral is as follows:
[0030] 1. Flange; 11. Packing gland; 12. Packing; 13. Valve stem; 14. Opening; 2. Tail plate; 3. Fastener; 4. Pressure application plate; 41. Support plate; 5. Pressure application rod; 51. Handle; 6. Limiting plate; 7. Arc plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0031] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.
[0032] First, as Figure 1 and Figure 4 , a brief description of the structure of the gate valve in the prior art is given. The valve body of the gate valve is connected and installed to the bracket through the flange 1. A rotating disc is installed on the bracket, and the valve stem 13 connected to the rotating disc passes through the bracket and enters the valve body to control the opening and closing of the disc; Packing 12 is filled between the valve stem 13 and the valve body, and the packing gland 11 is used to compress the packing 12 to achieve a sealing effect; Moreover, the upper end of the packing gland 11 extends out of the flange 1 and turns outwards to form a flanging.
[0033] Among them, an opening 14 is formed between the brackets. Usually, two or three etc. are evenly distributed in the opening 14. Through the opening 14, the compression state of the packing gland 11 can be observed, and whether the packing leaks can be observed through the opening 14. And, a plurality of bolt holes for connecting the two flanges 1 are provided at the opening 14.
[0034] The packing 12 can be made of materials such as rubber, flexible graphite, and carbon fiber.
[0035] During the long-term use of the above gate valve structure, with the long-term rotation of the valve stem 13 and the transportation of the medium, the packing 12 may develop packing gaps due to long-term wear, medium erosion, temperature changes, and aging, resulting in leakage at the packing gland.
[0036] In response to the above phenomena, the present utility model is improved through the following technical solutions.
[0037] On the one hand, the present utility model provides a fastening device for reducing leakage of valve packing, as described in detail below.
[0038] Embodiment 1
[0039] As shown in Figure 1 and Figure 2 , a fastening device for reducing leakage of valve packing includes at least one set of pressing mechanisms. The pressing mechanism includes a tail plate 2 and at least one fastener 3 connected to one end of the tail plate 2. The fastener 3 is used to connect to the flange 1 of the valve at the same time, so that the other end of the tail plate 2 presses down on the packing gland 11 of the valve.
[0040] The beneficial effect of this embodiment is that when leakage occurs, the tail plate 2 is connected to the flange 1 through the fastener 3, and the other end of the tail plate 2 presses down on the packing gland 11. As the fastening of the fastener 3 is enhanced, the downward pressure of the tail plate 2 on the packing gland 11 is enhanced, causing the packing gland 11 to press down on the packing 12 below it. The packing 12 deforms and fills the gap between it and the valve stem 13, so as to improve the technical problem that in some cases, the valve leakage cannot be solved by replacing the packing, resulting in the valve leakage not being eliminated in the short term.
[0041] As a specific solution of the above embodiment, the other end of the tail plate 2 is adapted to extend into the upper part of the packing gland 11 from the opening 14 to perform a pressing operation on the packing gland 11, causing the packing 12 to deform and perform a gap filling operation.
[0042] Among them, the tail plate 2 can be made of a steel plate with a thickness of 5 - 10 mm.
[0043] Embodiment 2
[0044] As shown in Figure 1 and Figure 2 , on the basis of Embodiment 1, the fastener 3 includes bolts, and there are at least two bolts, which are spaced apart and distributed at one end of the tail plate 2.
[0045] The beneficial effect of adopting the preferred solution in the above embodiment is that the tail plate 2 and the flange 1 are firmly connected by bolts to ensure the stable installation of the tail plate 2 and form a stable downward pressure on the packing gland 11.
[0046] A through hole adapted to the bolt hole at the opening 14 of the flange 1 is provided at one end of the tail plate 2.
[0047] As a specific installation method, the bolt located at the opening 14 on the flange 1 is removed, and then the fastener 3 is passed through the tail plate 2 and the flange 1 at the same time. By tightening the fastener 3, the tail plate 2 can be gradually pressed against the packing gland 11.
[0048] The bolt includes a screw rod and a plurality of nuts distributed at both ends of the screw rod, and washers are provided on the lower sides of the nuts.
[0049] Obviously, since the upper end of the packing gland 11 extends out of the flange 1, the initial downward pressure state of the tail plate 2 is inclined. The upper end of the tail plate 2 presses on the other end of the packing gland 11, and the lower end is the end connected to the fastener 3, making the bolt tightened and the downward pressure of the fastener 3 stronger.
[0050] Embodiment 3
[0051] Such as Figure 2 and Figure 3 , on the basis of Embodiments 1 and 2, the fastener 3 further includes a pressing plate 4 fixedly connected to one end of the tail plate 2 at the lower end and a pressing rod 5 threadedly connected to the upper end of the pressing plate 4 in the middle. The pressing rod 5 is inclined and the lower end presses on the other end of the tail plate 2.
[0052] The beneficial effect of adopting the preferred solution in the above embodiment is that by the rotation of the pressing rod 5, the pressing rod 5 presses on the other end of the tail plate 2 to increase the downward pressure on the packing gland 11.
[0053] Among them, the pressing plate 4 can be fixed to the tail plate 2 by welding.
[0054] On the basis of the above embodiment, the lower end side of the pressing rod 5 is an arc surface structure to ensure the contact area between the lower end of the pressing rod 5 and the tail plate 2 and facilitate insertion into the threaded hole opened at the upper end of the pressing plate 4.
[0055] During the process of pressing the other end of the tail plate 2 by the pressing rod 5, both ends of the tail plate 2 are stressed, which can relatively ensure that the tail plate 2 is in a horizontal state and facilitate the tightening of the nut of the fastener 3.
[0056] Embodiment 4
[0057] Such as Figure 2 and Figure 3, on the basis of Embodiments 1-3, a limiting plate 6 is fixedly connected to the upper side of the other end of the tail plate 2, and the lower end of the pressing rod 5 abuts against both the limiting plate 6 and the other end of the tail plate 2 simultaneously.
[0058] The beneficial effect of adopting the preferred solution in the above embodiment is to ensure that the pressing rod 5 forms a stable downward pressure on the tail plate 2 and prevent it from sliding relative to the tail plate 2.
[0059] Among them, the limiting plate 6 and the tail plate 2 can be fixedly connected by welding.
[0060] As a specific downward pressing state, the lower end of the pressing rod 5 abuts against the included angle position where the limiting plate 6 and the tail plate 2 are connected simultaneously.
[0061] Embodiment 5
[0062] As Figure 2 and Figure 3 , on the basis of Embodiments 1-4, a support plate 41 is fixedly connected to one side of the pressing plate 4. The support plate 41 is inclined, with its upper end fixedly connected to the pressing plate 4 and its lower end fixedly connected to the tail plate 2.
[0063] The beneficial effect of adopting the preferred solution in the above embodiment is to form a supporting and pulling effect on the pressing plate 4 through the support plate 41, maintain the vertical state of the pressing plate 4, provide stable support for the pressing rod 5, and realize stable downward pressing on the tail plate 2.
[0064] The support plate 41 can be made of steel plate and is fixedly connected to the tail plate 2 and the pressing plate 4 by welding.
[0065] Embodiment 6
[0066] As Figure 2 and Figure 3 , on the basis of Embodiments 1-5, a handle 51 is fixedly connected to the upper end of the pressing rod 5. One end of the handle 51 is fixedly connected to the pressing rod 5, and the other end extends horizontally.
[0067] The beneficial effect of adopting the preferred solution in the above embodiment is to facilitate the rotation of the pressing rod 5 through the handle 51.
[0068] Embodiment 7
[0069] As Figure 2 and Figure 3 , on the basis of Embodiments 1-6, the end face of the other end of the tail plate 2 is an arc surface structure to adapt to the arc surface structure formed on the side of the valve stem 13.
[0070] The beneficial effect of adopting the preferred solution in the above embodiment is that the arc surface structure adapts to the arc-shaped side of the valve stem 13 to ensure that the end of the other end of the tail plate 2 forms a larger contact area with the packing gland 11.
[0071] As a specific solution of the above embodiment, the arc surface structure may be a circular arc surface.
[0072] Embodiment 8
[0073] As Figure 2 and Figure 3 , on the basis of Embodiments 1-7, the pressing mechanism is provided with at least two groups, and each tail plate 2 presses down on the packing gland 11 of the valve at the same time.
[0074] The beneficial effect of adopting the preferred solution in the above embodiment is that a uniform and stable downward pressure on the packing gland 11 can be formed by multiple tail plates 2.
[0075] In the embodiment of the present utility model, two openings 14 are symmetrically shown, that is, two groups of pressing mechanisms are symmetrically shown, so as to realize the simultaneous downward pressing action on the packing gland 11 in a symmetrical manner, so that the packing 12 deforms uniformly, realizing a tight filling operation to prevent leakage.
[0076] Embodiment 9
[0077] As Figure 2 and Figure 3 , on the basis of Embodiments 1-8, the fastening device further includes at least two arc plates 7. Each arc plate 7 is arranged in a ring shape and presses down on the packing gland 11 at the same time, and each tail plate 2 presses down on the ring structure formed by the arc plates 7 at the same time. The gap between two adjacent arc plates 7 is located below the other end of the tail plate 2.
[0078] The beneficial effect of adopting the preferred solution in the above embodiment is that, through the transmission of the annular arrangement structure formed by all the arc plates 7, it is ensured that the packing gland 11 receives a uniform downward pressure.
[0079] In the embodiment of the present utility model, two arc plates 7 are shown.
[0080] On the other hand, the present utility model provides a valve, which is specifically described as follows.
[0081] Embodiment 10
[0082] As Figure 1 and Figure 2 , a valve includes a fastening device for reducing valve packing leakage as described in Embodiments 1-9. The valve further includes a valve body, a flange 1 and a bracket. The valve body is connected and installed to the bracket through the flange 1. A rotating disc is installed on the bracket. The valve stem 13 connected to the rotating disc passes through the bracket and enters the valve body to control the opening and closing of the disc; packing 12 is filled between the valve stem 13 and the valve body, and the packing gland 11 is used to press the packing 12 to achieve a sealing effect; and the upper end of the packing gland 11 extends out of the flange 1 and turns outwards to form a flanging.
[0083] Among them, an opening 14 is formed between the brackets. Generally, two or three etc. are evenly distributed in the opening 14. Through the opening 14, the pressing state of the stuffing gland 11 can be observed, and whether the packing leaks can be observed through the opening 14. Moreover, a plurality of bolt holes for connecting two flange plates 1 are provided at the opening 14.
[0084] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0085] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0086] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0087] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0088] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0089] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A fastening device for reducing valve packing leakage, characterized in that: The invention comprises at least one set of clamping mechanisms, wherein the clamping mechanism comprises a tail plate (2) and at least one fastener (3) connected to one end of the tail plate (2), wherein the fastener (3) is used to be simultaneously connected to a flange (1) of a valve so that the other end of the tail plate (2) is pressed down on a packing gland (11) of the valve.
2. A fastening device for reducing valve packing leakage according to claim 1, characterized in that: The fastener (3) comprises a bolt, and at least two of the bolts are provided and are spaced apart and distributed at one end of the tail plate (2).
3. A fastening device for reducing valve packing leakage according to claim 2, characterized in that: The fastener (3) further comprises a pressure plate (4) whose lower end is fixedly connected to one end of the tail plate (2) and a pressure rod (5) whose middle part is threadedly connected to the upper end of the pressure plate (4); the pressure rod (5) is arranged obliquely and its lower end is pressed down on the other end of the tail plate (2).
4. A fastening device for reducing valve packing leakage according to claim 3, characterized in that: A limiting plate (6) is fixed on the upper side of the other end of the tail plate (2), and the lower end of the pressure rod (5) abuts against the limiting plate (6) and the other end of the tail plate (2) at the same time.
5. A fastening device for reducing valve packing leakage according to claim 3, characterized in that: A support plate (41) is fixed to one side of the pressure plate (4); the support plate (41) is arranged at an angle, and the upper end is fixedly connected to the pressure plate (4), and the lower end is fixedly connected to the tail plate (2).
6. A fastening device for reducing valve packing leakage according to claim 3, characterized in that: A handle (51) is fixed to the upper end of the pressure rod (5).
7. A fastening device for reducing valve packing leakage according to any one of claims 1 to 6, characterized in that: The other end surface of the tail plate (2) is a curved surface structure.
8. A fastening device for reducing valve packing leakage according to any one of claims 1 to 6, characterized in that: At least two groups of the clamping mechanisms are provided, and each tail plate (2) is pressed down on the packing gland (11) of the valve at the same time.
9. A fastening device for reducing valve packing leakage according to claim 8, characterized in that: The fastening device further comprises at least two arc plates (7), each of the arc plates (7) being arranged in a ring shape and simultaneously pressed down on the packing gland (11), and each of the tail plates (2) simultaneously being pressed down on the annular structure formed by each of the arc plates (7), and a gap between two adjacent arc plates (7) being located at the lower side of the other end of the tail plate (2).
10. A valve, characterized in that: The invention comprises a fastening device for reducing valve packing leakage as described in any one of claims 1 to 9.