Horizontal gate valve

Abstract

The invention relates to the technical field of valves, and discloses a horizontal gate valve which solves the problems in the background art and comprises a valve body, a valve cover, a gate plate, a supporting frame, a valve shaft, a sealing component, a tensioning mechanism, a guide mechanism and a transmission mechanism. The valve body and the valve cover are connected to form an integral valve shell, and guide rails are arranged on the upper end face and the lower end face of the valve body respectively. The supporting frame is supported and limited to roll on the guide rails through the rail wheels at the upper end and the lower end; the transmission mechanism is arranged on the valve cover and can drive the valve shaft to rotate; the whole opening and closing piece is supported by the supporting frame, the rolling wheels are arranged on the support and slide on the rails of the valve body, and the circular flashboards on the two sides are supported on the supporting frame to move along with the supporting frame during opening and closing, so that the valve is opened or closed, and the opening and closing of the valve is facilitated. The structure design is suitable for large-caliber and heavy valves.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to a horizontal plug-in valve. Background Art

[0002] The basic principle of the gate valve is to drive the valve stem to rotate through an electric device, so that the valve stem nut drives the gate to move perpendicular to the center of the pipeline, and through the tensioning device to protect the rubber sealing ring, so that the gate sealing ring is separated from the valve seat when opening, and fits the valve seat when closing, so as to achieve the purpose of opening or closing the valve.

[0003] During the opening and closing process of a conventional gate valve, the gate and the valve seat of the valve body are always in a state of fit and friction, which can easily lead to wear of the sealing surface. Especially in the field of large-diameter valves, either the seal fits tightly, causing the valve to be stuck when opened and closed, or the seal fits loosely, causing leakage after the valve is closed. For this reason, we propose a horizontal gate valve with a new type of expansion-type sealing structure. Summary of the invention

[0004] In order to solve the above problems, the present invention provides the following technical solutions: a horizontal gate valve, comprising a valve body, a valve cover, a gate, a support frame, a valve shaft, a sealing component, a tensioning mechanism, a guide mechanism, and a transmission mechanism; the valve body and the valve cover are connected to form an integral valve housing, and guide rails are respectively provided on the upper and lower end surfaces of the valve body; the support frame is supported by track wheels at the upper and lower ends and restricted from rolling on the guide rails; the transmission mechanism is arranged on the valve cover and can drive the valve shaft to rotate; the thread on the valve shaft and the valve stem nut assembled on the support frame form a spiral transmission, thereby being able to push the support frame to open / close the valve.

[0005] Furthermore, support guide blocks and wedge blocks are respectively provided at the front and rear ends of the support frame, and the gate plate is connected to the support guide block through a pin shaft. When the valve is closed, the limit roller contacts the end face of the valve body, restricting the gate plate from continuing to move in the valve closing direction and allowing the support frame to continue to move in the valve closing direction. The oblique angle long hole on the support guide block and the wedge block work together to guide and push the gate plate to move in the forward and backward directions, thereby forming a seal.

[0006] Furthermore, the sealing component is arranged on the gate plate, and when the valve is closed, the sealing component is in close contact with the valve body to form a valve seal.

[0007] Furthermore, the compression spring is arranged between the support frame and the gate plate, and is used for resetting when the valve is opened, pushing the gate plate to close and separate from the sealing surface, thereby forming an open state of the valve.

[0008] Furthermore, the support frame is provided with four track wheels at the upper and lower ends respectively, and the track wheels have wheel rims.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The entire opening and closing part is supported by a support frame, and rollers are arranged on the support frame to slide on the track of the valve body. When opening and closing, the circular gate plates on both sides are supported on the support frame and move with it. It is a structural design suitable for large-caliber and heavy-duty valves.

[0011] 2. During the movement, the gate is in a state of contraction towards the center under the dual effects of friction and spring preload. A gap is reserved between the gate seal and the valve seat to protect the rubber ring during the opening and closing process to avoid wear and cutting.

[0012] 3. When the gate moves to the closed position, the limit roller at the horizontal end of the gate presses against the end face of the valve body to limit the gate from continuing to move in the closing direction. At this time, the gate support frame will continue to move in the closing direction. At this time, the gate has been limited in the closing direction, and the oblique angle long holes and wedge blocks on the support frame will squeeze the gate to move in the direction of the pipeline, achieving the tightening function, the sealing surface fits, and the valve is closed.

[0013] 4. The gate is completely separated from the sealing surface during movement, and automatically expands and fits the sealing surface when it moves to the closed position. The operation process has a simple structure, small driving force and reliable sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a front view structural schematic diagram of the present invention as a whole;

[0016] Figure 2 It is a schematic side view of the structure of the present invention as a whole;

[0017] Figure 3 It is a schematic diagram of the enlarged structure of the present invention;

[0018] In the figure: 1. valve body; 2. valve cover; 3. transmission mechanism; 4. valve shaft; 5. valve stem nut; 6. support frame; 7. gate; 8. guide rail; 9. track wheel; 10. limit roller; 11. sealing component; 12. compression spring; 13. support guide block; 14. pin shaft; 15. wedge block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Depend on Figure 1-3 The present invention includes a valve body 1, a valve cover 2, a gate plate 7, a support frame 6, a valve shaft 4, a sealing component 11, a tensioning mechanism, a guiding mechanism, and a transmission mechanism 3; the valve body 1 is connected to the valve cover 2 to form an integral valve housing, and guide rails 8 are respectively provided on the upper and lower end surfaces of the valve body 1; the support frame 6 is supported by track wheels 9 at the upper and lower ends and restricted to roll on the guide rails 8; the transmission mechanism 3 is arranged on the valve cover 2, and can drive the valve shaft 4 to rotate; the thread on the valve shaft 4 and the valve stem nut 5 assembled on the support frame 6 form a spiral transmission, thereby being able to push the support frame 6 to open / close the valve.

[0021] A support guide block 13 and a wedge block 15 are respectively provided at the front and rear ends of the support frame 6, and the gate plate 7 is connected to the support guide block 13 through a pin shaft 14. When the valve is closed, the limit roller 10 contacts the end surface of the valve body 1, restricting the gate plate 7 from continuing to move in the valve closing direction, and allowing the support frame 6 to continue to move in the valve closing direction. The oblique angle long hole on the support guide block 13 and the wedge block 15 work together to guide and push the gate plate 7 to move in the forward and backward directions, thereby forming a seal.

[0022] The sealing component 11 is arranged on the gate plate 7, and when the valve is closed, the sealing component 11 is in close contact with the valve body 1 to form a valve seal.

[0023] The compression spring 12 is arranged between the support frame 6 and the gate plate 7, and is used for resetting when the valve is opened, pushing the gate plate 7 to close and separate from the sealing surface, thereby forming an open state of the valve.

[0024] The upper and lower ends of the support frame 6 are respectively provided with four track wheels 9, and the track wheels 9 have wheel rims.

[0025] Working principle: The gate support frame 6 drives the gate 7 to move in the closing direction under the action of the driving device. During the movement, the gate 7 is in a state of contraction toward the center under the dual action of friction and spring preload 12. A gap of 3 to 5 mm is reserved between the gate sealing ring 11 and the valve seat 1 to protect the rubber ring during the opening and closing process to avoid wear and cutting.

[0026] When the gate 7 moves to the closed position, the limiting roller 10 at the horizontal end of the gate 7 presses against the end face of the valve body 1 to limit the gate 7 from continuing to move in the closing direction. At this time, the gate support frame 6 will continue to move in the closing direction. At this time, the gate 7 has been limited in the closing direction, and the oblique angle long hole and wedge block 15 on the support frame 6 will squeeze the gate 7 to move in the direction of the pipeline, achieving the tightening function, the sealing surface fits, and the valve 1 is closed.

[0027] When the valve is open:

[0028] The gate support frame 6 moves in the opening direction, and the oblique slot of the gate support frame 6 first pulls the gate pin 14 to shrink toward the center, and the sealing surface is separated. When the gate pin 14 is pulled to the end of the oblique slot, the gate support frame 6 starts to pull the gate 7 to move in the opening direction, and the valve 1 opens. During the opening process, under the dual effects of the driving tension and the spring preload 12, the gate 7 is always in a state of shrinking toward the center, avoiding the wear and cutting of the rubber ring 11.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal gate valve, characterized in that: It comprises a valve body (1), a valve cover (2), a gate plate (7), a support frame (6), a valve shaft (4), a sealing component (11), a tensioning mechanism, a guiding mechanism, and a transmission mechanism (3), wherein: The valve body (1) and the valve cover (2) are connected to form an integral valve housing, and guide rails (8) are respectively provided on the upper and lower end surfaces of the valve body (1); The support frame (6) is supported and restricted to roll on the guide rail (8) by rail wheels (9) at the upper and lower ends; The transmission mechanism (3) is arranged on the valve cover (2) and is capable of driving the valve shaft (4) to perform rotational movement; The thread on the valve shaft (4) forms a spiral transmission with the valve stem nut (5) assembled on the support frame (6), thereby being able to push the support frame (6) to open / close the valve.

2. A horizontal gate valve according to claim 1, characterized in that: The support frame (6) is provided with a support guide block (13) and a wedge block (15) at the front and rear ends respectively, and the gate plate (7) is connected to the support guide block (13) via a pin shaft (14). When the valve is closed, the limit roller (10) contacts the end surface of the valve body (1), restricting the gate plate (7) from continuing to move in the valve closing direction, and allowing the support frame (6) to continue to move in the valve closing direction. The oblique angle long hole on the support guide block (13) and the wedge block (15) work together to guide and push the gate plate (7) to move in the forward and backward directions, thereby forming a seal.

3. A horizontal gate valve according to claim 2, characterized in that: The sealing component (11) is arranged on the gate plate (7), and when the valve is closed, the sealing component (11) is in close contact with the valve body (1) to form a valve seal.

4. A horizontal gate valve according to claim 3, characterized in that: The compression spring (12) is arranged between the support frame (6) and the gate plate (7) and is used to reset when the valve is opened, push the gate plate (7) to close and separate from the sealing surface, thereby forming an open state of the valve.

5. A horizontal gate valve according to claim 4, characterized in that: The support frame (6) is provided with four track wheels (9) at the upper and lower ends respectively, and the track wheels (9) are provided with wheel rims.

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