Gate valve with sealing structure

Abstract

The utility model discloses a gate valve with a sealing structure, which relates to the field of gate valves and comprises a valve body, the top of the valve body is connected with a valve cover, the top of the valve cover is provided with a hexagonal cover, the middle of the hexagonal cover is connected with a valve rod in a penetrating manner, the bottom of the valve rod is rotatably connected with a valve plate for adjusting flow, and the top of the valve rod is provided with a hand wheel. Elastic sealing pieces are symmetrically arranged on the left side and the right side of the valve plate and correspond to second sealing strips, the second sealing strips are installed in caulking grooves, and the caulking grooves are symmetrically formed in the inner wall of the bottom of the valve body. And a sealing sleeve for elastically sealing the valve rod and the valve cover is arranged at the top of the hexagonal cover. In the using process of the gate valve with the sealing structure, elastic sealing treatment is conducted between the valve plate and the valve body and between the valve rod and the valve deck, the sealing effect can be adjusted in a self-adaptive mode according to the pressure of a pipeline, pressure fluctuation of the pipeline is better resisted, the overall sealing effect of the gate valve is improved, and leakage is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gate valve, concretely is a gate valve with sealing structure. BACKGROUND

[0002] As an indispensable component in industrial pipeline system, the gate valve is widely used in petroleum, chemical industry, electric power, metallurgy and other fields, responsible for controlling the on-off and flow regulation of fluid in the pipeline, the sealing structure of the traditional gate valve is relatively simple, which is difficult to adapt to complex working conditions, the gate plate and the valve seat of some gate valves are only sealed by plane contact, when the pipeline pressure fluctuates or vibrates, the gate plate is easy to displace, resulting in gap on the sealing surface, thereby causing leakage, moreover, the sealing surface is easy to wear after long-term use, further reducing the sealing performance.

[0003] To solve the above-mentioned defects, the prior art (Chinese patent with publication number CN219198323U and publication date of June 16, 2023) a gate valve with double sealing structure, by setting the filler, the sealing seat and the rubber ring, in use, rely on the setting rubber ring and filler double sealing, so as to improve the overall sealing effect;

[0004] The above-mentioned scheme improves the sealing effect of the gate valve by sealing the valve plate and the screw rod, but in actual use, the valve plate and the screw rod are outside the flow range, while the sealing performance between the valve plate and the valve body after closing and the sealing between the valve stem and the valve cover can directly affect the use effect of the valve body, and through the operation of setting multiple sealing rings, the installation position of the sealing ring after installation is consistent, and it cannot resist the impact caused by the pipeline pressure fluctuation well. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a gate valve with sealing structure to solve the problem of poor sealing effect between the valve plate and the valve body and between the valve stem and the valve cover in the prior art gate valve during use, and the single sealing effect is not enough to resist the impact caused by the pipeline pressure fluctuation.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gate valve with sealing structure, comprising a valve body, the top of the valve body is connected with a valve cover, the top of the valve cover is provided with a hexagonal cover, a first sealing washer is installed between the hexagonal cover and the top of the valve cover, the middle of the hexagonal cover is connected with a valve stem, the bottom of the valve stem extends to the inside of the valve body, the bottom of the valve stem is rotatably connected with a valve plate for adjusting flow, and the top of the valve stem is installed with a hand wheel.

[0007] The left and right sides of the valve plate are symmetrically provided with elastic sealing members, and the elastic sealing members are correspondingly provided with the second sealing strips, the second sealing strips are installed in the embedding grooves, and the embedding grooves are symmetrically arranged on the inner wall of the bottom of the valve body.

[0008] The top of the hexagonal cover is provided with a sealing sleeve for elastically sealing the valve rod and the valve cover.

[0009] Further, the elastic sealing members on the valve plate comprise grooves, the grooves are arranged on the left and right sides of the valve plate, the first sealing strips are installed in the grooves, and the first sealing strips are provided with a "U" shaped structure in cross section.

[0010] Further, the first rubber ring is connected with the inner wall of the first sealing strip through the spring, and the second sealing strip opposite to the first sealing strip is provided with a sealing opening in a ring structure.

[0011] Further, the thickness of the first rubber ring is greater than the depth of the inner recess of the first sealing strip, and the first rubber ring is elastically clamped in the embedding groove of the second sealing strip through the spring.

[0012] Further, the top of the hexagonal cover is provided with a butt joint ring, the top of the butt joint ring is embeddedly connected with a sealing sleeve, the sealing sleeve is provided with a hollow "T" shaped structure as a whole, the bottom of the sealing sleeve is inserted into the inside of the butt joint ring, and the second sealing gasket is arranged between the bottom of the sealing sleeve and the top of the butt joint ring.

[0013] Further, the top inner wall of the sealing sleeve is provided with a hollow structure, the second rubber ring is fixedly installed at the end of the top inner wall of the sealing sleeve, and the second rubber ring is in contact with the outer side of the valve rod.

[0014] Further, the elastic metal sheet is arranged in the hollow space of the top inner wall of the sealing sleeve, the elastic metal sheet is provided with a circular truncated cone structure, the top of the sealing sleeve is symmetrically penetrated and screw-connected with a screw rod, the bottom of the screw rod is rotationally connected with the top of the elastic metal sheet, and the inner side of the elastic metal sheet is in abutment with the outer side of the second rubber ring.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The gate valve with the sealing structure can elastically seal the valve plate and the valve body and the valve rod and the valve cover, can adaptively adjust the sealing effect according to the pipeline pressure, can better resist the pressure fluctuation of the pipeline, can improve the overall sealing effect of the gate valve, and can prevent leakage.

[0017] Further, the first sealing strip outside the valve plate will move to the opposite position of the second sealing strip in the embedding groove after the valve plate closes the inside of the valve body, the first rubber ring on the first sealing strip is butted with the sealing port on the second sealing strip, the spring can make the first rubber ring resist the sealing port, and the spring can also buffer the external force when the internal pressure of the valve body increases subsequently, reducing the damage to the gate valve;

[0018] Further, the docking ring is connected and sealed between the second sealing washer and the sealing sleeve, the second rubber ring on the inner wall of the sealing sleeve is attached to the outside of the valve rod, thereby sealing the valve rod and the valve cover;

[0019] Further, when the fluid pressure in the gate valve increases, in order to prevent leakage, the sealing property between the valve rod and the valve cover needs to be enhanced, and then the screw rod on the sealing sleeve is rotated, the screw rod will press down the elastic metal sheet at the bottom after being rotated, so that the elastic metal sheet further resists the second rubber ring, and the second rubber ring will be more attached to the valve rod, thereby maintaining the sealing property between the valve rod and the valve cover. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic view of the utility model;

[0021] Figure 2 It is a whole structure schematic view of the utility model;

[0022] Figure 3 It is a valve plate local structure schematic view of the utility model;

[0023] Figure 4 It is a valve plate local structure schematic view of the utility model;

[0024] Figure 5 It is a valve cover top structure schematic view of the utility model;

[0025] Figure 6 It is a sealing sleeve internal explosion structure schematic view of the utility model.

[0026] In the drawing: 1, valve body; 2, valve cover; 3, hexagonal cover; 4, valve rod; 5, hand wheel; 6, valve plate; 7, recess; 8, first sealing strip; 9, first rubber ring; 10, spring; 11, second sealing strip; 12, embedding groove; 13, sealing port; 14, first sealing washer; 15, docking ring; 16, sealing sleeve; 17, second sealing washer; 18, second rubber ring; 19, elastic metal sheet; 20, screw rod. DETAILED DESCRIPTION

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Embodiment one: please refer to Figure 1 Figure 6 The utility model provides the following technical scheme: a gate valve with sealing structure, including valve body 1, the top of valve body 1 is connected with valve cover 2, the top of valve cover 2 is provided with hexagonal cover 3, first sealing washer 14 is installed between hexagonal cover 3 and the top of valve cover 2, valve stem 4 is connected with the middle part of hexagonal cover 3 and penetrates, the bottom of valve stem 4 extends to the inside of valve body 1, the bottom of valve stem 4 is rotatably connected with the valve plate 6 of adjusting flow, the top of valve stem 4 is installed with hand wheel 5, the left and right sides of valve plate 6 are provided with the elastic sealing element, and the elastic sealing element is correspondingly arranged with second sealing strip 11, second sealing strip 11 is installed in the recess 12, and the recess 12 is symmetrically opened on the inner wall of the bottom of valve body 1, the top of hexagonal cover 3 is provided with the sealing sleeve 16 of the elastic sealing of valve stem 4 and valve cover 2,

[0029] In use, the bottom of valve body 1 is connected with the corresponding pipeline on both sides, after the rotation of hand wheel 5 on valve cover 2, the vertical sliding of valve plate 6 can be driven by valve stem 4, thereby adjusting the flow in valve body 1, the elastic sealing element on both sides of valve plate 6 can keep the sealing property of valve body 1 when closing the gate valve, and when the pressure in the pipeline increases, the elastic sealing element can adapt to the change by elastic deformation, and the sealing property also increases accordingly, and the corresponding second sealing strip 11 will also be more tightly embedded in the recess 12, so that the gate valve has higher applicability, and the sealing treatment of valve stem 4 and valve cover 2 is strengthened by sealing sleeve 16, when the pressure in the gate valve increases, the sealing treatment of valve stem 4 and valve cover 2 also needs to be strengthened, and the sealing element in sealing sleeve 16 can be adjusted, so that valve stem 4 and valve cover 2 always keep the sealing state.

[0030] Embodiment 1:

[0031] On the basis of embodiment one, first rubber ring 9, spring 10 and sealing port 13 are also disclosed, please refer to Figure 3 Figure 4 ​​As shown, the specific structure is as follows: the elastic sealing element on the valve plate 6 includes a groove 7, which is provided on the left and right sides of the valve plate 6, and a first sealing strip 8 is installed in the groove 7, the first sealing strip 8 is provided in a “U” shaped structure in cross section, a first rubber ring 9 is arranged in the first sealing strip 8, the first rubber ring 9 is connected to the inner wall of the first sealing strip 8 through a spring 10, a second sealing strip 11 opposite to the first sealing strip 8 is provided with a sealing opening 13, the sealing opening 13 is provided in an annular structure, the thickness of the first rubber ring 9 is greater than the depth of the concave portion of the first sealing strip 8, and the first rubber ring 9 is elastically clamped in the embedded groove 12 of the second sealing strip 11 through the spring 10.

[0032] In use, after the valve plate 6 closes the inside of the valve body 1, the first sealing strip 8 on the outside of the valve plate 6 will move to the position opposite to the second sealing strip 11 in the embedded groove 12, the first rubber ring 9 on the first sealing strip 8 is butted against the sealing opening 13 on the second sealing strip 11, the spring 10 can make the first rubber ring 9 abut against the sealing opening 13, and when the pressure in the valve body 1 increases subsequently, the spring 10 can also buffer the external force, reducing the damage to the gate valve.

[0033] Embodiment 2

[0034] On the basis of embodiment two, a second rubber ring 18 is also disclosed, please refer to Figure 1 Figure 2 and Figure 5 Figure 6 As shown, the specific structure is as follows: the top of the hexagonal cover 3 is provided with a butt joint ring 15, the top of the butt joint ring 15 is embeddedly connected with a sealing sleeve 16, the sealing sleeve 16 is provided in a hollow “T” shaped structure as a whole, the bottom of the sealing sleeve 16 is inserted into the inside of the butt joint ring 15, the second sealing gasket 17 is installed between the bottom of the sealing sleeve 16 and the top of the butt joint ring 15, the top inner wall of the sealing sleeve 16 is provided in a hollow structure, the second rubber ring 18 is fixedly installed on the end of the top inner wall of the sealing sleeve 16, and the second rubber ring 18 is in contact with the outside of the valve stem 4;

[0035] In use, the butt joint ring 15 is connected and sealed between the second sealing gasket 17 and the sealing sleeve 16, the second rubber ring 18 on the inner wall of the sealing sleeve 16 is in contact with the outside of the valve stem 4, thereby sealing the valve stem 4 and the valve cover 2.

[0036] Please refer to the figure, the elastic metal sheet 19 is installed in the hollow space of the top inner wall of the sealing sleeve 16, the elastic metal sheet 19 is provided in a circular truncated cone structure, the screw rod 20 is symmetrically threaded connected through the top of the sealing sleeve 16, the bottom of the screw rod 20 is rotatably connected with the top of the elastic metal sheet 19, and the inside of the elastic metal sheet 19 is in abutment with the outside of the second rubber ring 18;

[0037] ​​In use, when the fluid pressure inside the gate valve increases, in order to prevent leakage, the sealing between the valve stem 4 and the valve cover 2 needs to be enhanced, and then the screw rod 20 on the rotating sealing sleeve 16 is rotated, after the screw rod 20 is rotated, the bottom elastic metal sheet 19 is pressed down, so that the elastic metal sheet 19 further abuts against the second rubber ring 18, the second rubber ring 18 is more fitted with the valve stem 4, so as to keep the sealing between the valve stem 4 and the valve cover 2.

[0038] The contents not described in detail in the specification belong to the prior art known to the person skilled in the art.

[0039] Although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or part of the technical features can be replaced, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A gate valve with a sealing structure, comprising a valve body (1), a valve cover (2) connected to the top of the valve body (1), a hexagonal cover (3) provided on the top of the valve cover (2), a first sealing gasket (14) installed between the hexagonal cover (3) and the top of the valve cover (2), a valve stem (4) being connected through the middle of the hexagonal cover (3), the bottom of the valve stem (4) extending into the interior of the valve body (1), a valve plate (6) for adjusting flow rate being rotatably connected to the bottom of the valve stem (4), and a handwheel (5) being installed on the top of the valve stem (4); Its features are: The valve plate (6) is symmetrically provided with elastic sealing elements on the left and right sides, and the elastic sealing elements are correspondingly provided with the second sealing strip (11). The second sealing strip (11) is installed in the groove (12), and the groove (12) is symmetrically opened on the inner wall of the bottom of the valve body (1). The top of the hexagonal cover (3) is provided with a sealing sleeve (16) that provides an elastic seal for the valve stem (4) and the valve cover (2).

2. A gate valve with a sealing structure according to claim 1, characterized in that: The elastic seal on the valve plate (6) includes a groove (7), which is opened on the left and right sides of the valve plate (6). A first sealing strip (8) is installed in the groove (7), and the cross section of the first sealing strip (8) is set as a "U" shaped structure.

3. A gate valve with a sealing structure according to claim 2, characterized in that: The first sealing strip (8) has a first rubber ring (9) inside. The first rubber ring (9) is connected to the inner wall of the first sealing strip (8) by a spring (10). The second sealing strip (11) opposite to the first sealing strip (8) has a sealing opening (13) reserved. The sealing opening (13) is set as an annular structure.

4. A gate valve with a sealing structure according to claim 3, characterized in that: The thickness of the first rubber ring (9) is greater than the concave depth of the first sealing strip (8), and the first rubber ring (9) is elastically engaged with the groove (12) on the second sealing strip (11) by the spring (10).

5. A gate valve with a sealing structure according to claim 1, characterized in that: The top of the hexagonal cover (3) is fitted with a docking ring (15), and the top of the docking ring (15) is fitted with a sealing sleeve (16). The sealing sleeve (16) is configured as a hollow "T" shaped structure. The bottom of the sealing sleeve (16) is inserted into the docking ring (15). A second sealing gasket (17) is installed between the bottom of the sealing sleeve (16) and the top of the docking ring (15).

6. A gate valve with a sealing structure according to claim 5, characterized in that: The top inner wall of the sealing sleeve (16) is configured as a hollow structure, and a second rubber ring (18) is fixedly installed at the end of the top inner wall of the sealing sleeve (16). The second rubber ring (18) is in close contact with the outer side of the valve stem (4).

7. A gate valve with a sealing structure according to claim 6, characterized in that: An elastic metal sheet (19) is installed in the hollow space of the top inner wall of the sealing sleeve (16). The elastic metal sheet (19) is configured as a frustum-shaped structure. A screw (20) is symmetrically threaded through the top of the sealing sleeve (16). The bottom of the screw (20) is rotatably connected to the top of the elastic metal sheet (19). The inner side of the elastic metal sheet (19) abuts against the outer side of the second rubber ring (18).

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