CN216812920U

CN216812920U - Sealing gate valve capable of being closed quickly

Info

Publication number: CN216812920U
Application number: CN202220125890.9U
Authority: CN
Inventors: 林文华; 林博正; 林博策; 丁美云; 赵崇; 曹敏; 吴夏珩; 唐浩; 王永洲; 张博; 张建军; 时振胜; 高扬; 杜宝胜; 王真
Original assignee: Shandong Autotec Automatic Control Equipment Co ltd
Current assignee: Shandong Autotec Automatic Control Equipment Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-06-24
Anticipated expiration: 2032-01-18

Abstract

The utility model discloses a sealing gate valve capable of quickly closing a gate, which comprises a lower valve body, wherein a fluid channel is connected in the lower valve body, a valve cover is connected on the lower valve body, a first sealing layer is connected between the valve cover and the lower valve body, a lifting cavity is arranged in the valve cover and the lower valve body and is communicated with the middle part of the fluid channel, fluid pressure buffers are respectively connected on two sides of the lifting cavity of the lower valve body, a valve plate is connected in the lifting cavity in a sliding manner and is in movable sealing fit with the fluid channel, a valve rod is rotatably connected at the top end of the valve plate, a filling cavity is connected in the valve cover, and lubricating filling materials are arranged in the filling cavity. Compared with the prior art, the utility model has the advantages that: the quick opening and closing are facilitated, the water hammer effect is prevented, the erosion and the abrasion of the sealing surfaces of the third sealing layer and the second sealing layer are reduced, and the service life is prolonged.

Description

Sealing gate valve capable of being closed quickly

Technical Field

The utility model relates to the technical field of sealing gate valves, in particular to a sealing gate valve capable of being closed quickly.

Background

The gate valve is an opening and closing piece valve plate, the movement direction of the valve plate is vertical to the fluid direction, the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled, the gate valve is sealed by the contact of a valve seat and the valve plate, and usually, a sealing surface is subjected to surfacing welding of metal materials to increase the wear resistance, such as surfacing welding of 1Cr13, STL6, stainless steel and the like; the existing gate valve is large in overall dimension, needs a certain space for opening, is relatively time-consuming in opening and closing, is not comprehensive enough in sealing, easily causes leakage of internal substances in use, and is easy to erode and scratch between sealing surfaces, so that the service life is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the technical defects and provide a sealing gate valve which is convenient to quickly open and close, prevents the water hammer effect, reduces the erosion and abrasion of the sealing surfaces of a third sealing layer and a second sealing layer and prolongs the service life.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: a sealing gate valve capable of quickly closing a gate comprises a lower valve body, wherein a fluid channel is connected in the lower valve body, a valve cover is connected on the lower valve body, a first sealing layer is connected between the valve cover and the lower valve body, a lifting cavity is arranged in the valve cover and the lower valve body and is communicated with the middle part of the fluid channel, fluid pressure buffers are respectively connected and arranged on two sides of the lifting cavity of the lower valve body, a valve plate is connected and arranged in the lifting cavity in a sliding manner and is movably matched with the fluid channel in a sealing manner, a valve rod is rotatably connected at the top end of the valve plate, a filling cavity is connected in the valve cover and is internally provided with lubricating fillers, a filling sleeve is connected and arranged on the filling cavity of the valve cover in a sealing manner, a connecting cylinder is rotatably connected in the filling sleeve, a hand wheel is connected at the other end of the connecting cylinder, the valve rod penetrates through the filling cavity and extends out of the connecting cylinder at the other end, the connecting cylinder is matched with the valve rod.

Compared with the prior art, the utility model has the advantages that: by rotating the hand wheel, the hand wheel drives the connecting cylinder, the connecting cylinder drives the valve rod to move up and down, and the valve rod drives the valve plate to move up and down, so that the fluid channel can be opened and closed quickly; the fluid pressure buffer is arranged to prevent the water hammer effect generated in the process of quick opening and closing and reduce the damage of the water hammer effect to the fluid channel; the lifting cavity provides a space for the lifting of the valve plate, and the arrangement of the packing cavity and the lubricating packing facilitates the lubricating of the valve rod and simultaneously plays a role in sealing; the first sealing layer prevents fluid from flowing out of the joint between the bonnet and the lower valve body.

Further, fluid pressure buffer locates the piston cylinder of valve body in promotion chamber both sides down including connecting, sliding connection is equipped with the piston board in the piston cylinder, piston board and piston cylinder sealing connection, when the valve rod is closed fast, the fluid comes to one side and can form positive pressure, and then flows back after producing the impact to the valve plate, and the fluid drive piston board of backward flow is from top to bottom in the piston cylinder, and then cushions the impact, prevents that fluid passage and water pipe from receiving destruction.

Further, the section of valve plate is big-end-up's trapezoidal structure, the fluid passage top is connected and is equipped with first heterotypic piece, first heterotypic piece is close to curb plate one side and is connected and is equipped with the second sealing layer, it is equipped with second heterotypic piece to connect on the fluid passage diapire, second heterotypic piece is close to valve plate one side and is connected and is equipped with the third sealing layer, third sealing layer and second sealing layer respectively with the sealed butt of valve plate, the section of valve plate is big-end-up's trapezoidal structure and third sealing layer and second sealing layer respectively with the sealed butt of curb plate be convenient for seal fluid valve plate passageway, reduce the impact of fluid to third sealing layer and second sealing layer simultaneously.

Furthermore, the distance from the second sealing layer to the valve rod is larger than the distance from the third sealing layer to the valve rod, so that the valve plate is prevented from rubbing with the second sealing layer and the third sealing layer in the closing process, and the service lives of the second sealing layer and the third sealing layer are prolonged.

Further, valve rod circumference is equipped with the external screw thread, connect on connecting cylinder and the valve gap and be equipped with the internal thread with valve rod matched with, the hand wheel of being convenient for rotates through the drive connecting cylinder, and then drives about the valve rod.

Drawings

Fig. 1 is a schematic structural view of a sealing gate valve capable of rapidly closing a gate according to the present invention.

As shown in the figure: 1. the sealing device comprises a lower valve body, 2, a fluid channel, 3, a valve cover, 4, a first sealing layer, 5, a lifting cavity, 6, a fluid pressure buffer, 7, a valve plate, 8, a valve rod, 9, a packing cavity, 10, lubricating packing, 11, a packing sleeve, 12, a connecting cylinder, 13, a hand wheel, 14, a piston cylinder, 15, a piston plate, 16, a first special-shaped block, 17, a second sealing layer, 18, a second special-shaped block, 19 and a third sealing layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to the attached drawing 1, a sealing gate valve capable of rapidly closing a gate comprises a lower valve body 1, a fluid channel 2 is connected and arranged in the lower valve body 1, a valve cover 3 is connected and arranged on the lower valve body 1, a first sealing layer 4 is connected and arranged between the valve cover 3 and the lower valve body 1, a lifting cavity 5 is arranged in the valve cover 3 and the lower valve body 1, the lifting cavity 5 is communicated with the middle of the fluid channel 2, fluid pressure buffers 6 are respectively connected and arranged on two sides of the lifting cavity 5 of the lower valve body 1, a valve plate 7 is slidably connected and arranged in the lifting cavity 5, the valve plate 7 is movably matched with the fluid channel 2 in a sealing manner, a valve rod 8 is rotatably connected and arranged at the top end of the valve plate 7, a filling cavity 9 is connected and arranged in the valve cover 3, a lubricating filler 10 is arranged in the filling cavity 9, a filler sleeve 11 is hermetically connected and arranged on the filling cavity 9 of the valve cover 3, and a connecting cylinder 12 is connected and arranged in the filler sleeve 11, the other end of the connecting cylinder 12 is connected with a hand wheel 13, the valve rod 8 penetrates through the packing cavity 9, the other end of the valve rod extends out of the connecting cylinder 12, and the connecting cylinder 12 is matched with the valve rod 8.

The fluid pressure buffer 6 comprises a piston cylinder 14 connected to the lower valve body 1 at two sides of the lifting cavity 5, a piston plate 15 is arranged in the piston cylinder 14 in a sliding connection mode, and the piston plate 15 is connected with the piston cylinder 14 in a sealing mode; the cross section of the valve plate 7 is of a trapezoid structure with a large upper part and a small lower part, the top of the fluid channel 2 is connected with a first special-shaped block 16, one side, close to the side plate, of the first special-shaped block 16 is connected with a second sealing layer 17, the bottom wall of the fluid channel 2 is connected with a second special-shaped block 18, one side, close to the valve plate 7, of the second special-shaped block 18 is connected with a third sealing layer 19, and the third sealing layer 19 and the second sealing layer 17 are respectively in sealing and abutting joint with the valve plate 7; the distance from the second sealing layer 17 to the valve rod 8 is larger than the distance from the third sealing layer 19 to the valve rod 8; the valve rod 8 circumference is equipped with the external screw thread, connect on connecting cylinder 12 and the valve gap 3 and be equipped with the internal thread with valve rod 8 matched with.

When the quick opening and closing valve is implemented specifically, the hand wheel 13 is rotated to drive the connecting cylinder 12 through the hand wheel 13, the connecting cylinder 12 drives the valve rod 8 to move up and down through threaded connection, and the valve rod 8 drives the valve plate 7 to move up and down, so that the quick opening and closing of the fluid channel 2 are facilitated; the fluid pressure buffer 6 is arranged to prevent the water hammer effect generated in the process of quick opening and closing and reduce the damage of the water hammer effect to the fluid channel 2; the lifting cavity 5 provides a space for the lifting of the valve plate 7, and the arrangement of the packing cavity 9 and the lubricating packing 10 is convenient for lubricating the valve rod 8 and has a sealing effect; the first sealing layer 4 prevents fluid from flowing out from the joint between the valve cover 3 and the lower valve body 1; the section of the valve plate 7 is of a trapezoid structure with a large upper part and a small lower part, and the third sealing layer 19 and the second sealing layer 17 are respectively in sealing abutment with the side plate, so that the valve plate 7 can seal the fluid channel 2, and the impact of the fluid on the third sealing layer 19 and the second sealing layer 17 is reduced; the distance from the second sealing layer 17 to the valve rod 8 is larger than the distance from the third sealing layer 19 to the valve rod 8, so that the valve plate 7 is prevented from rubbing with the second sealing layer 17 and the third sealing layer 19 in the closing process, and the service lives of the second sealing layer 17 and the third sealing layer 19 are prolonged; when the valve rod 8 is closed quickly, positive pressure is formed by fluid towards one side, then the fluid flows back after impacting the valve plate 7, the flowing back fluid drives the piston plate 15 to move up and down in the piston cylinder 14, and then impact is buffered, and the fluid channel 2 and the water pipe are prevented from being damaged.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a can close sealing gate valve of floodgate fast, includes lower valve body (1), its characterized in that: a fluid channel (2) is connected and arranged in the lower valve body (1), a valve cover (3) is connected and arranged on the lower valve body (1), a first sealing layer (4) is connected and arranged between the valve cover (3) and the lower valve body (1), a lifting cavity (5) is arranged in the valve cover (3) and the lower valve body (1), the lifting cavity (5) is communicated with the middle part of the fluid channel (2), fluid pressure buffers (6) are respectively connected and arranged at two sides of the lifting cavity (5) of the lower valve body (1), a valve plate (7) is arranged in the lifting cavity (5) in a sliding connection manner, the valve plate (7) is movably matched with the fluid channel (2) in a sealing manner, a valve rod (8) is rotatably connected and arranged at the top end of the valve plate (7), a packing cavity (9) is connected and arranged in the valve cover (3), a lubricating packing (10) is arranged in the packing cavity (9), and a packing sleeve (11) is arranged on the valve cover (3) in a sealing manner, the packing box is characterized in that a connecting cylinder (12) is arranged in the packing sleeve (11) in a rotating connection mode, a hand wheel (13) is arranged at the other end of the connecting cylinder (12) in a connecting mode, the valve rod (8) penetrates through the packing cavity (9) and extends out of the connecting cylinder (12) from the other end of the valve rod, and the connecting cylinder (12) is matched with the valve rod (8).

2. The sealing gate valve capable of closing gate rapidly according to claim 1, wherein: the fluid pressure buffer (6) comprises a piston cylinder (14) which is connected with the two sides of the lifting cavity (5) of the lower valve body (1), a piston plate (15) is arranged in the piston cylinder (14) in a sliding connection mode, and the piston plate (15) is connected with the piston cylinder (14) in a sealing mode.

3. The sealing gate valve capable of closing gate rapidly according to claim 1, wherein: the section of valve plate (7) is big-end-up's trapezium structure, fluid passage (2) top connection is equipped with first abnormal block (16), first abnormal block (16) are close to curb plate one side and connect and are equipped with second sealing layer (17), connect on fluid passage (2) diapire and be equipped with second abnormal block (18), second abnormal block (18) are close to valve plate (7) one side and connect and are equipped with third sealing layer (19), third sealing layer (19) and second sealing layer (17) are sealed the butt with valve plate (7) respectively.

4. The sealing gate valve capable of closing gate rapidly according to claim 3, wherein: the distance from the second sealing layer (17) to the valve rod (8) is larger than the distance from the third sealing layer (19) to the valve rod (8).

5. The sealing gate valve capable of closing gate rapidly according to claim 1, wherein: the valve rod (8) is circumferentially provided with external threads, and the connecting cylinder (12) and the valve cover (3) are connected with internal threads matched with the valve rod (8).