Gate valve with double-sealing structure

Abstract

The utility model discloses a gate valve with a double-sealing structure, which comprises a valve body, a valve plate, a silica gel pad sealing assembly and a silica gel strip sealing assembly, and the valve plate penetrates through a groove plate on one side of the valve body and can perform feeding motion in the valve body; the silica gel pad sealing assembly comprises a bottom plate which is fixed to the portion, close to one side of the feeding port of the valve body, of the valve body groove plate and located above the valve plate, and a first gap exists between the bottom plate and the valve plate; the silica gel pad is arranged in a first gap between the bottom plate and the valve plate; the pressing plate is arranged on the outer sides of the bottom plate and the silica gel pad; the silica gel strip sealing assembly comprises a sealing seat which is fixed on the valve body trough plate deviating from one side of the feeding port of the valve body, and second gaps are formed between the sealing seat and the upper and lower surfaces of the valve plate; the silica gel strip is arranged in a second gap between the sealing seat and the valve plate; and the sealing gland is arranged on the outer side of the silica gel strip. According to the gate valve, the problem of material leakage of the gate valve can be effectively solved, the production efficiency is improved, and the use environment of a production field is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the plug-in valve technical field, specifically, especially about a plug-in valve of double sealing structure. BACKGROUND

[0002] With the continuous advancement of industrial automation and the improvement of material control requirements of various industries, plug-in valves are favored by more and more people because they can realize remote control, accurate flow regulation and other functions. They are widely used in many industrial fields such as petroleum, chemical industry, electric power, water treatment, metallurgy, mining and building materials.

[0003] In the use process of the plug-in valve, if the sealing effect of the valve body is poor, material leakage will occur, which will cause medium loss, cost waste, safety hazards, environmental pollution, equipment damage, affect the service life of the equipment and other related problems, and even may cause production interruption, affect production efficiency and quality, and bring economic losses to the enterprise. The specific reasons for the material leakage of the plug-in valve are as follows:

[0004] ①Seal problem: the cooperation between the sealing ring and the valve seat and the valve plate is not tight, or the sealing ring is aging and worn, which may cause material leakage;

[0005] ②Valve stem problem: the valve stem is bent or the material selection of the valve stem and the valve stem nut and other components is improper, which causes the upper and lower closing parts to be misaligned, thereby causing material leakage;

[0006] ③Operation problem: if the plug-in valve is closed too fast, the sealing surface is not in good contact or has been damaged, which may also cause material leakage;

[0007] ④Medium and temperature problem: some special medium gradually cools down after the plug-in valve is closed, which causes the sealing surface to have fine cracks and causes erosion phenomenon; or the working environment temperature is too high or too low, which causes the material to deform, which may cause material leakage;

[0008] ⑤Impurity problem: impurities such as welding slag, rust and dust are embedded, or mechanical parts fall off in the production system and block the valve core, which causes the plug-in valve to be unable to close tightly, which also causes material leakage. INVENTION CONTENTS

[0009] The utility model aims at solving one of the technical problems existing in the prior art. Therefore, the utility model provides a plug-in valve with double sealing structure, which aims at effectively solving the problem of material leakage of the plug-in valve.

[0010] To achieve the above object, the utility model discloses the following technical scheme: a double sealing structure's plug-in valve, including valve body, valve plate, silica gel pad sealing assembly and silica gel strip sealing assembly, the valve plate penetrates the groove board of valve body one side, and can be in the feeding motion in the valve body, is used for opening and shutting the feed inlet of valve body, wherein, silica gel pad sealing assembly includes: bottom plate, is fixed on the valve body groove board of being close to the feed inlet one side of valve body, and is located above the valve plate, and there is first gap between bottom plate and valve plate, silica gel pad is arranged in the first gap between bottom plate and valve plate, and the lower surface of silica gel pad and the upper surface of valve plate are attached, pressing plate is arranged outside bottom plate and silica gel pad, for pressing silica gel pad, silica gel strip sealing assembly includes: sealing seat, is fixed on the valve body groove board of being away from the feed inlet one side of valve body, and there is second gap between sealing seat and the upper and lower surfaces of valve plate, silica gel strip is arranged in the second gap between sealing seat and valve plate, and the upper and lower surfaces of silica gel strip and valve plate are attached, sealing gland is arranged outside silica gel strip, for pressing silica gel strip.

[0011] As preferred: the bottom plate and the pressing plate are provided with first threaded holes penetrating each other, and fastening bolts are screwed in the first threaded holes to fasten and connect the bottom plate and the pressing plate.

[0012] As preferred: the pressing plate is further provided with second threaded holes, adjusting bolts are screwed in the second threaded holes, and the silica gel pad is pressed by the adjusting bolts.

[0013] As preferred: the silica gel pad is distributed around the feed inlet of the valve body, thereby forming a sealing area surrounded by the silica gel pad.

[0014] As preferred: the sealing gland is provided with third threaded holes, adjusting screws and adjusting nuts are screwed in the third threaded holes, and the silica gel strip is pressed by the adjusting screws.

[0015] As preferred: the silica gel strip is arranged in multiple rows from inside to outside.

[0016] The utility model discloses the above technical scheme, and it has the following advantages:

[0017] 1. The double sealing structure formed by the silica gel pad sealing assembly and the silica gel strip sealing assembly effectively solves the problem of material leakage in the plug-in valve, improves production efficiency, and improves the use environment of the production site.

[0018] 2. The utility model can effectively compensate for the material leakage problem of the plug-in valve caused by other reasons while improving the sealing performance of the plug-in valve. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings. The description is presented for purposes of illustration and description, but is not intended to limit the application. In the drawings:

[0020] Figure 1 A side view structural schematic diagram of the plug valve with double sealing structure provided by an embodiment of the application;

[0021] Figure 2 A partial structural schematic diagram of the plug valve with double sealing structure provided by the embodiment of the application;

[0022] Figure 3 A top view structural schematic diagram of the plug valve with double sealing structure provided by the embodiment of the application;

[0023] The various reference signs in the drawings are as follows:

[0024] 1 - valve body; 2 - valve plate; 3 - silica gel pad sealing assembly; 31 - bottom plate; 32 - silica gel pad; 33 - pressing plate; 34 - fastening bolt; 35 - adjusting bolt; 4 - silica gel strip sealing assembly; 41 - sealing seat; 42 - silica gel strip; 43 - sealing pressing cover; 44 - adjusting screw; 45 - adjusting nut. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the application clearer, the specific embodiments of the application will be further described below with reference to the drawings. Although the exemplary embodiments of the application are shown in the drawings, it should be understood that the application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the application and to fully convey the scope of the application to those skilled in the art.

[0026] In the description of the application, it should be understood that 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0031] The utility model provides a plug valve of double sealing structure, including valve body, valve plate, silica gel pad sealing assembly and silica gel strip sealing assembly, the groove board of valve plate penetrates one side of valve body, and can do the feed motion in the valve body, silica gel pad sealing assembly includes: bottom plate, is fixed on the valve body groove board of one side of feed port close to valve body, and is located above the valve plate, and there is first gap between bottom plate and valve plate, silica gel pad is arranged in the first gap between bottom plate and valve plate, pressing plate is arranged outside bottom plate and silica gel pad, silica gel strip sealing assembly includes: sealing seat, is fixed on the valve body groove board of one side of feed port away from valve body, and there is second gap between the upper and lower surfaces of sealing seat and valve plate, silica gel strip is arranged in the second gap between sealing seat and valve plate, and the upper and lower surfaces of silica gel strip 42 and valve plate are attached, silica gel strip 42 as second heavy sealing piece, guarantee silica gel strip 42 and the upper and lower surfaces of valve plate are attached closely, reach good sealing effect, sealing gland is arranged outside silica gel strip 42, for pressing silica gel strip 42.

[0032] Below, the plug valve of double sealing structure provided by the utility model embodiment is in detail explained in combination with the drawings.

[0033] Please refer to Figure 1 、 Figure 2 The utility model provides a plug valve of double sealing structure, including valve body 1, valve plate 2, silica gel pad sealing assembly 3 and silica gel strip sealing assembly 4, valve plate 2 penetrates the groove board of one side of valve body 1, and can do the feed motion in valve body 1, is used for opening and shutting the feed port of valve body 1.

[0034] Among them, silica gel pad sealing assembly 3 includes: bottom plate 31, is fixed on the valve body 1 groove board of one side of feed port close to valve body 1, and is located above valve plate 2, and there is first gap between bottom plate 31 and valve plate 2, silica gel pad 32 is arranged in the first gap between bottom plate 31 and valve plate 2, and the lower surface of silica gel pad 32 and the upper surface of valve plate 2 are attached, and silica gel pad 32 as first heavy sealing piece, keeps the attachment of the upper surface of valve plate 2 in the process of the feed motion of valve plate 2, to realize the effect of isolating material, guarantee sealing effect, pressing plate 33 is arranged outside bottom plate 31 and silica gel pad 32, for pressing silica gel pad 32.

[0035] Silica gel strip sealing assembly 4 includes: sealing seat 41, is fixed on the valve body 1 groove board of one side of feed port away from valve body 1, and there is second gap between the upper and lower surfaces of sealing seat 41 and valve plate 2, silica gel strip 42 is arranged in the second gap between sealing seat 41 and valve plate 2, and the upper and lower surfaces of silica gel strip 42 and valve plate 2 are attached, and silica gel strip 42 as second heavy sealing piece, guarantee silica gel strip 42 and the upper and lower surfaces of valve plate 2 are attached closely, reach good sealing effect, sealing gland 43 is arranged outside silica gel strip 42, for pressing silica gel strip 42.

[0036] In the above embodiment, preferably, the bottom plate 31 and the pressing plate 33 are provided with first threaded holes penetrating through each other, and fastening bolts 34 are screwed in the first threaded holes to fasten and connect the bottom plate 31 and the pressing plate 33.

[0037] In the above embodiment, preferably, the pressing plate 33 is further provided with second threaded holes, and adjusting bolts 35 are screwed in the second threaded holes to press the silica gel pad 32, so as to ensure that the silica gel pad 32 is perpendicular to the valve plate 2 and is stably installed; meanwhile, the silica gel pad 32 is a consumable part, which can be replaced after the fastening bolts 35 and the pressing plate 33 are disassembled during later maintenance.

[0038] In the above embodiment, preferably, referring to Figure 3 , the silica gel pad 32 is distributed around the inlet of the valve body 1, thereby forming a sealing area surrounded by the silica gel pad 32, to ensure the reliability of the sealing.

[0039] In the above embodiment, preferably, referring to Figure 2 , the sealing gland 43 is provided with third threaded holes, and adjusting screws 44 and adjusting nuts 45 are screwed in the third threaded holes, the silica gel strip 42 is pressed by the adjusting screws 44, and during use, the adjusting nuts 45 can be regularly tightened to ensure that the silica gel strip 42 is tightly attached to the upper and lower surfaces of the valve plate 2, thereby achieving the effect of long-term effective sealing; meanwhile, the silica gel strip 42 is a consumable part, which can be replaced after the adjusting nuts 45 and the sealing gland 43 are disassembled during later maintenance.

[0040] In the above embodiment, preferably, the silica gel strip 42 is arranged in multiple rows from inside to outside.

[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A double sealing structure of the gate valve, characterized in that: It includes a valve body, a valve plate, a silicone pad sealing assembly and a silicone strip sealing assembly. The valve plate passes through the slot plate on one side of the valve body and can perform feeding motion in the valve body to open and close the feed port of the valve body. Wherein, the silicone pad sealing assembly includes: a bottom plate fixed on the valve body groove plate on a side close to the feed inlet of the valve body and located above the valve plate, with a first gap between the bottom plate and the valve plate; A silicone pad is disposed in a first gap between the bottom plate and the valve plate, with a lower surface of the silicone pad in contact with an upper surface of the valve plate; A pressing plate, arranged outside the bottom plate and the silicone pad, for pressing the silicone pad; The silicone strip sealing assembly includes: A sealing seat is fixed on the valve body groove plate on the side away from the feed inlet of the valve body, and a second gap exists between the sealing seat and the upper and lower surfaces of the valve plate; A silicone strip is disposed in a second gap between the sealing seat and the valve plate, and the silicone strip is in contact with the upper and lower surfaces of the valve plate; The sealing gland is arranged on the outside of the silicone strip and is used to compress the silicone strip.

2. The gate valve according to claim 1, characterized in that: The bottom plate and the pressure plate are provided with first threaded holes that are interlinked with each other, and fastening bolts are screwed into the first threaded holes to fasten the bottom plate and the pressure plate together.

3. The gate valve according to claim 2, characterized in that: The pressure plate is further provided with a second threaded hole, and an adjusting bolt is screwed into the second threaded hole, and the silicone pad is pressed by the adjusting bolt.

4. The gate valve according to claim 1, characterized in that: The silicone pad is distributed around the feed port of the valve body, thereby forming a sealing area surrounded by the silicone pad.

5. The gate valve according to any one of claims 1 to 4, characterized in that: A third threaded hole is provided on the sealing gland, and an adjusting screw and an adjusting nut are screwed into the third threaded hole, so that the silicone strip is pressed tightly by the adjusting screw.

6. The gate valve according to any one of claims 1 to 4, characterized in that: The silicone strips are arranged in multiple lanes from the inside to the outside.

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