High-pressure gate valve with buffer pressure relief structure

Abstract

The utility model discloses a high-pressure gate valve with a buffer pressure relief structure, which comprises a valve body, a sealing cover body is arranged at the upper end of the valve body and above a sealing valve core, the bottom of the lower end of the sealing cover body is connected with the upper end of the valve body through a fixing bolt and a first mounting flange, and a sealing piece is arranged in the middle in the sealing cover body. And the lower end of one side of the sealing cover body is connected with one side of the upper end of the valve body through a backflow pipe, and an air release valve is arranged in the middle of the backflow pipe. According to the high-pressure gate valve with the buffer pressure relief structure, when the pressure of internal liquid is too high, the internal liquid penetrates through a positioning net plate to extrude a top plate through a pressure relief channel, so that a buffer spring and a moving rod move upwards to open the pressure relief channel, and the liquid enters a sealing cover body to enlarge a storage space; and then the liquid flows back to the interior of the valve body through the return pipe while the pressure is released through the air release valve, so that the pressure borne by the valve body is relieved, and the service life and the use safety of the valve body are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure gate valve related technical field, concretely is a kind of high pressure gate valve with buffer pressure relief structure. BACKGROUND

[0002] High pressure gate valve is a valve, its opening and closing part is gate, the movement direction of gate is perpendicular to fluid direction, can only be opened and closed, cannot be adjusted and throttled, belongs to forced sealing type valve, so when valve is closed, pressure must be applied to gate, to force sealing surface not to leak.

[0003] After searching, it is found that the high pressure gate valve in the prior art is typically as disclosed in CN217355759U, a high pressure gate valve convenient to adjust, including flange A and connecting channel, the left end of the connecting channel is provided with flange A, the right end of the connecting channel is provided with flange B, the upper end of the connecting channel is provided with flange C, the upper end of the flange C is provided with flange D, the flange C and the flange D are fixedly connected through the bolt A, then after determining that installation is completed, the circular handle can be rotated to open and close, when the screwing is too tight, the outer opening lengthener is turned outward by one hundred and eighty degrees from the buckle groove through the rotating shaft, and then the outer opening lengthener is rotated by hand, so that it can be used, after use, the outer opening lengthener is stored in the inside of the buckle groove through the rotating shaft, so that the outer opening lengthener can be easily opened without a lever, so that physical strength can be greatly saved, and it is more convenient.

[0004] In summary, when the existing high pressure gate valve is used in high temperature environment, the liquid stored in the sealing cavity is prone to volume expansion after the gate valve is closed for a period of time, which increases the pressure difference between the inside of the high pressure gate valve and the outside, and when the pressure is overloaded, the connection is prone to explosion, leakage and damage, reducing the safety of use, and the existing equipment needs to be improved for the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of high pressure gate valve with buffer pressure relief structure, to solve the problems of the existing high pressure gate valve in high temperature environment use in the background art, liquid is stored in the sealing cavity and prone to volume expansion after the gate valve is closed for a period of time, which increases the pressure difference between the inside of the high pressure gate valve and the outside, and when the pressure is overloaded, the connection is prone to explosion, leakage and damage, reducing the safety of use.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of high pressure gate valve with buffer pressure relief structure, including valve body,

[0007] The sealing valve core is arranged in the middle of the valve body, a sealing cover body is arranged above the upper end of the valve body, the lower end of the sealing cover body is connected with the upper end of the valve body through fixing bolts and a first mounting flange, a sealing element is arranged in the middle of the sealing cover body, pressure relief assemblies are symmetrically arranged at the lower end of the sealing element, the lower end of the sealing element is detachably connected with the through hole of the upper end of the valve body, a rubber sleeve is arranged at the outer side of the upper end of the sealing element, the outer side of the rubber sleeve is attached to the upper end of the sealing cover body, a backflow pipe is arranged at the lower end of one side of the sealing cover body and connected with the upper end of the valve body, and a deflation valve is arranged in the backflow pipe.

[0008] Preferably, the valve body is provided with a first connecting flange and a second connecting flange at both ends, respectively, and a filter screen frame is arranged in the inner side of the valve body close to the second connecting flange.

[0009] Preferably, the sealing valve core comprises a sealing gate plate and a rotating base, the sealing gate plate is arranged in the middle of the upper end of the rotating base, the rotating base is in a semi-spherical structure, a support column is arranged at the lower end of the rotating base, and the outer side of the support column is connected with the middle lower end of the inner side of the valve body through a locating bearing.

[0010] Preferably, the outer side of the upper end of the sealing element is connected with the middle of the second mounting flange arranged at the upper end of the sealing cover body, the upper end of the second mounting flange is connected with the lower end of the locating support through a sealing gasket, the outer side of the lower end of the locating support is connected with the second mounting flange through equidistantly arranged fixing bolts penetrating the sealing gasket, the lower end of the valve rod body arranged in the middle of the locating support is detachably connected with the middle of the upper end of the sealing valve core through penetrating the sealing gasket, the second mounting flange and the sealing element.

[0011] Preferably, the pressure relief assembly comprises a pressure relief channel, a locating mesh plate is arranged in the middle of the inner side of the pressure relief channel, a moving rod is arranged below the middle of the locating mesh plate, the top of the moving rod is connected with the middle of the lower end of a top plate through penetrating the middle of the locating mesh plate and a buffer spring, the top plate is arranged at the outer side of the upper end of the pressure relief channel, and the size of the top plate is larger than the size of the pressure relief channel.

[0012] Preferably, the material of the sealing element is hard rubber material, and the rubber sleeve is soft rubber material.

[0013] Compared with the prior art, the high-pressure gate valve with the buffer pressure relief structure has the advantages that

[0014] In order to solve the existing high pressure gate valve in high temperature environment, after closing the gate valve for a period of time, the liquid stored in the sealing cavity is easy to expand, the pressure difference between the inside and the outside of the high pressure gate valve is increased, and when the pressure is overloaded, the connection is easy to burst, leakage and damage occur, and the safety of use is reduced, the problem, the present application passes through the pressure relief channel, when the pressure of the internal liquid is too high, the positioning net plate is extruded, the buffer spring and the moving rod are moved upward, the pressure relief channel is opened, the liquid enters the sealing cover body to expand the storage space, then the pressure relief valve is relieved, and the liquid is returned to the valve body through the return pipe, so that the pressure on the valve body is relieved, the service life of the valve body is guaranteed, and the safety of use is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the sectional structure of the utility model;

[0016] Figure 2 It is a front view of the sectional structure of the utility model; Figure 1 It is an enlarged structure schematic view of A in the utility model;

[0017] Figure 3 It is a front view of the sectional structure of the utility model; Figure 1 It is an enlarged structure schematic view of B in the utility model;

[0018] Figure 4 It is a front view of the sectional structure of the utility model; Figure 2 It is an enlarged structure schematic view of C in the utility model;

[0019] Figure 5 It is a front view of the sectional structure of the utility model.

[0020] In the drawing: 1, valve body;2, first connecting flange;3, second connecting flange;4, filter screen frame;5, sealing valve core;501, sealing gate;502, rotating base;503, support column;504, positioning bearing;6, sealing cover body;7, first mounting flange;8, sealing element;801, pressure relief channel;802, positioning net plate;803, moving rod;804, buffer spring;805, top plate;9, rubber sleeve;10, second mounting flange;11, sealing gasket;12, positioning support;13, valve stem body;14, return pipe;15, pressure relief valve. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] Please refer to Figures 1-5 , the utility model provides a technical scheme: a high pressure gate valve with buffer pressure relief structure, according to Figure 1 、 Figure 2 、 Figure 4 And Figure 5 As shown, the valve body 1 both ends are provided with first connecting flange 2 and second connecting flange 3 respectively, and the valve body 1 is provided with filter screen frame 4 inside near second connecting flange 3 side, through filter screen frame 4, it is convenient for the liquid that enters the valve body 1 inside to filter, prevents the impurity adhesion on the inner wall of valve body 1, influences the leakproofness of sealing valve core 5 use, the valve body 1 inside middle is provided with sealing valve core 5, sealing valve core 5 includes sealing gate 501 and rotating base 502, and sealing gate 501 is installed in rotating base 502 upper end middle, while rotating base 502 is hemispherical structure, rotating base 502 lower end bottom is provided with support column 503, and support column 503 outside is connected with valve body 1 inside middle lower end through locating bearing 504, through support column 503 and locating bearing 504, when rotating base 502 and sealing gate 501 rotate, have higher stability, and the valve body 1 upper end is located above sealing valve core 5 and is provided with sealing cover body 6, while sealing cover body 6 lower end bottom is connected with valve body 1 upper end through fixed bolt and first mounting flange 7, sealing cover body 6 inside middle is provided with sealing element 8, and sealing element 8 lower end both sides are provided with pressure relief assembly, while sealing element 8 lower end outside is detachably connected with the through-hole of valve body 1 upper end, pressure relief assembly includes pressure relief channel 801, and pressure relief channel 801 inside middle is provided with locating screen plate 802, while locating screen plate 802 middle lower is provided with moving rod 803, moving rod 803 top penetrates locating screen plate 802 middle and is connected with buffer spring 804 and top plate 805 lower end middle, and top plate 805 is located pressure relief channel 801 upper end outside, while the size of top plate 805 is greater than the size of pressure relief channel 801, through pressure relief channel 801, when the liquid pressure in the valve body 1 is too high, liquid enters pressure relief channel 801 and extrudes top plate 805, then top plate 805 drives buffer spring 804 and moving rod 803 to move up, opens the top of pressure relief channel 801, and liquid enters the inside of sealing cover body 6, expands liquid storage space.

[0023] According to Figure 1 、 Figure 3 And Figure 5As shown, the outer side of the upper end of the sealing element 8 is provided with a rubber sleeve 9, and the outer side of the rubber sleeve 9 is attached to the inner upper end of the sealing cover body 6. The material of the sealing element 8 is rigid rubber material, and the rubber sleeve 9 is soft rubber material. Through the rubber sleeve 9, the upper end of the sealing element 8 and the connecting part of the sealing cover body 6 can be sealed, so as to avoid liquid overflow from the connecting part gap and improve the sealing performance. In addition, the liquid can extrude the rubber sleeve 9, further expand the liquid storage space, and improve the pressure relief and explosion-proof effect and the protection performance. The lower end of one side of the sealing cover body 6 is connected to the upper end of one side of the valve body 1 through a backflow pipe 14, and a pressure relief valve 15 is arranged in the middle of the backflow pipe 14. Through the pressure relief valve 15, the liquid pressure in the cavity of the sealing cover body 6 can be easily relieved. The relieved liquid reenters the inside of the valve body 1 through the backflow pipe 14. The outer side of the upper end of the sealing element 8 is connected to the middle of the second mounting flange 10 arranged at the upper end top of the sealing cover body 6. The upper end of the second mounting flange 10 is connected to the lower end of the positioning support 12 through a sealing gasket 11. At the same time, the lower end of the positioning support 12 is connected to the second mounting flange 10 through the equidistantly arranged fixing bolts penetrating the sealing gasket 11. The lower end of the valve stem body 13 arranged in the middle of the positioning support 12 penetrates the middle of the sealing gasket 11, the second mounting flange 10 and the sealing element 8 and is detachably connected to the middle of the upper end of the sealing valve core 5. By rotating the valve stem body 13, the valve stem body 13 drives the sealing valve core 5 to rotate, so that the sealing gate plate 501 seals the passage in the valve body 1, thereby completing the closing of the valve, and the upper end of the sealing gate plate 501 is separated from the bottom of the pressure relief passage 801, so that the pressure relief passage 801 is exposed. When the liquid pressure in the valve body 1 is too high, the pressure relief passage 801 can automatically relieve the pressure, thereby improving the safety of the valve body 1.

[0024] The terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only a simplified description for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model.

[0025] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high-pressure gate valve with a buffer pressure relief structure, comprising a valve body (1), characterized in that: the valve body (1) is internally provided with a sealing valve core (5), and the upper end of the valve body (1) is provided with a sealing cover body (6) above the sealing valve core (5), and the lower end of the sealing cover body (6) is connected with the upper end of the valve body (1) through fixing bolts and a first mounting flange (7), the sealing cover body (6) is internally provided with a sealing element (8), and the lower end of the sealing element (8) is symmetrically provided with a pressure relief assembly on both sides, and the lower end of the sealing element (8) is detachably connected with the upper end of the valve body (1) through a through hole, the upper end of the sealing element (8) is provided with a rubber sleeve (9), and the outer side of the rubber sleeve (9) is attached to the inner upper end of the sealing cover body (6), the lower end of one side of the sealing cover body (6) is connected with the upper end of the valve body (1) through a return pipe (14), and a pressure relief valve (15) is arranged in the return pipe (14).

2. The high pressure gate valve with a buffer pressure relief structure according to claim 1, characterized in that: The valve body (1) is provided with a first connecting flange (2) and a second connecting flange (3) at both ends, respectively, and the internal side of the valve body (1) near the second connecting flange (3) is provided with a filter screen frame (4).

3. The high pressure gate valve with a buffer pressure relief structure according to claim 1, characterized in that: The sealing valve core (5) comprises a sealing gate plate (501) and a rotating base (502), the sealing gate plate (501) is mounted on the upper end of the rotating base (502), and the rotating base (502) is a hemispherical structure, the lower end of the rotating base (502) is provided with a support column (503), and the outer side of the support column (503) is connected with the inner lower end of the valve body (1) through a locating bearing (504).

4. The high pressure gate valve with a buffer pressure relief structure according to claim 1, characterized in that: The outer side of the upper end of the sealing element (8) is connected with a second mounting flange (10) arranged at the upper end of the sealing cover body (6), the upper end of the second mounting flange (10) is connected with the lower end of a locating support (12) through a sealing gasket (11), the outer side of the lower end of the locating support (12) is connected with the second mounting flange (10) through fixing bolts arranged at equal intervals and penetrating the sealing gasket (11), a valve stem body (13) arranged in the locating support (12) is detachably connected with the upper end of the sealing valve core (5) through the sealing gasket (11), the second mounting flange (10) and the sealing element (8).

5. The high pressure gate valve with a cushioned pressure relief structure of claim 1, wherein: The pressure relief assembly comprises a pressure relief channel (801), and the inner middle of the pressure relief channel (801) is provided with a locating mesh plate (802), and the inner middle of the locating mesh plate (802) is provided with a moving rod (803) below, the top of the moving rod (803) penetrates the inner middle of the locating mesh plate (802) and is connected with the inner middle of a buffer spring (804) and a top plate (805) through the lower end of the top plate (805), and the top plate (805) is arranged on the outer side of the upper end of the pressure relief channel (801), and the size of the top plate (805) is larger than the size of the pressure relief channel (801).

6. The high pressure gate valve with a cushioned pressure relief structure of claim 1, wherein: The material of the sealing element (8) is hard rubber material, and the rubber sleeve (9) is soft rubber material.

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