Gate valve with double gate plates

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a gate valve with double gate plates, which comprises a valve body, a valve cover is mounted on the valve body through a bolt, a support frame is mounted at the upper end of the valve cover, and a threaded cylinder is rotatably mounted on the support frame through a bearing. The function of rapidly replacing the first gate plate and the second gate plate is achieved, the problems that most of valve plates on an existing double-gate-plate gate valve are fixedly installed, the valve plates are seriously abraded after the gate valve is used for a long time and need to be replaced, and the fixedly-installed valve plates are quite inconvenient to replace are solved, and the replacement efficiency of the valve plates is improved; through the design of the buffering structure, the buffering effect is achieved when the first gate plate and the second gate plate are connected with the valve body, the problems that an existing double-gate-plate gate valve is lack of a buffering structure, large impact force is generated when the valve rod drives the valve plate to be connected with the valve seat, and the valve plate and the valve seat are seriously abraded are solved, abrasion is reduced, and the service life of the gate valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a gate valve with double gate plate. BACKGROUND

[0002] Double gate plate gate valve is used for full open and full close opening and closing device, the device is suitable for being used as closed circuit device on the pipeline of water and sewage, is not allowed to be used for adjusting flow and emptying, parallel double gate plate gate valve is driven by the external power of cylinder or hand wheel, the valve rod drives the up and down movement of valve plate to realize the opening and closing of valve, and the pre-tightening force of spring arranged between the double gate plates is relied on during the opening and closing process of valve to realize the close contact of valve plate and valve seat, realizes sealing, and is widely used in petroleum, chemical industry, pharmacy, electric power and the like.

[0003] The upper valve plate of the existing double gate plate gate valve is mostly fixedly installed, the valve plate needs to be replaced due to serious wear after long-time use of the gate valve, the fixedly-installed valve plate is inconvenient to replace and has low replacement efficiency, and the existing double gate plate gate valve lacks a buffering device, so that a large impact force is generated when the valve rod drives the valve plate to be connected with the valve seat, the valve plate and the valve seat are seriously worn, and the service life of the gate valve is affected, therefore, the gate valve with double gate plates is provided for the above problems. UTILITY MODEL CONTENTS

[0004] In order to make up for the deficiency of the prior art, the upper valve plate of the existing double gate plate gate valve is mostly fixedly installed, the valve plate needs to be replaced due to serious wear after long-time use of the gate valve, the fixedly-installed valve plate is inconvenient to replace and has low replacement efficiency, and the existing double gate plate gate valve lacks a buffering device, so that a large impact force is generated when the valve rod drives the valve plate to be connected with the valve seat, the valve plate and the valve seat are seriously worn, and the service life of the gate valve is affected, therefore, the gate valve with double gate plates is provided for the above problems.

[0005] The utility model discloses a technical scheme that solves the technical problems: a gate valve with double gate plates, including the valve body, the valve body is installed with the valve cover through bolt, the upper end of valve cover is installed with support frame, support frame is rotatoryly installed with screw thread cylinder through bearing, screw thread cylinder is installed with valve rod through screw thread, the lower extreme of valve rod is provided with buffer structure, the lower extreme of buffer structure and the inside of valve body installs replacement structure, the left and right sides symmetry of replacement structure installs first gate plate and second gate plate.

[0006] The replacement structure includes a box body, the inner cavity bottom of the box body is symmetrically provided with a fixed sleeve, two groups of fixed sleeves are provided with a bidirectional screw rod through bearings, the front and rear sides of the bidirectional screw rod are provided with a threaded sleeve and a worm wheel installed at the front end of the bidirectional screw rod through screw threads, the left and right side walls of the threaded sleeve are symmetrically provided with a first L-shaped frame, and the inner cavity bottom of the box body is rotatoryly provided with a worm through bearings.

[0007] As preferred, the buffer structure comprises an inner rod mounted at the lower end of the valve rod, a buffer spring is mounted at the outer part of the lower end of the valve rod, and a cylinder rod is slidingly mounted at the lower outer wall of the buffer spring.

[0008] As preferred, the front side of the bidirectional screw rod is a left-handed screw rod, and the rear side of the bidirectional screw rod is a right-handed screw rod.

[0009] As preferred, the end face of the box body is provided with a through hole, the upper end of the worm extends to the upper part of the box body through the through hole, and the upper end of the worm is provided with a knob.

[0010] As preferred, the connection mode of the worm gear and the worm is meshing connection, a handle is mounted on the threaded cylinder, the left and right side walls of the box body are symmetrically provided with openings, and the box body is slidingly connected with the first L-shaped frame through the knob.

[0011] As preferred, the first shutter is symmetrically provided with a second L-shaped plate matched with the left first L-shaped frame, and the second shutter is symmetrically provided with a third L-shaped plate matched with the right first L-shaped frame.

[0012] As preferred, the lower end of the buffer spring is connected with the upper end of the cylinder rod, and the lower end of the cylinder rod is connected with the end face of the box body.

[0013] As preferred, the lower outer wall of the inner rod is symmetrically provided with a limiting plate, and the inner wall of the cylinder rod is provided with a sliding groove slidingly connected with the limiting plate.

[0014] The utility model discloses the beneficial effect lies in:

[0015] 1. The utility model discloses a structure design is replaced, and the two groups of screw sleeves are synchronized away and close to movement through the bidirectional screw rod reverse rotation, and the two groups of second L-shaped plates and two groups of third L-shaped plates are loosened and fixed, realize the function that the first shutter and the second shutter replace fast, solve the problem that the shutter of the existing double shutter is mostly fixed installation on the valve plate of gate valve, and the valve plate needs to be replaced after the long -time use of gate valve, and the inconvenient problem of fixed installation valve plate replacement is reduced, the valve maintenance length is reduced, and the replacement efficiency of valve plate is improved.

[0016] 2. The utility model discloses a buffer structure design, and the first shutter, the second shutter and the valve body are connected through the cooperation of the inner rod, the buffer spring and the cylinder rod, buffer effect is played, the problem that the gate valve of the existing double shutter lacks buffer structure is solved, the valve rod drives the valve plate and the valve seat to connect and produces greater impact force, causes the valve plate and the valve seat to wear seriously, reduces the wear, and prolongs the service life of gate valve. DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0019] Figure 2 It is a three-dimensional structure schematic diagram of the present application;

[0020] Figure 3 It is a three-dimensional structure schematic diagram of the present application;

[0021] Figure 4 It is a three-dimensional structure schematic diagram of the present application;

[0022] In the figure: 1, valve body; 11, bolt; 2, valve cover; 3, support frame; 4, threaded cylinder; 5, valve stem; 6, buffer structure; 61, inner rod; 611, limiting plate; 62, buffer spring; 63, cylinder rod; 631, sliding groove; 7, replacement structure; 71, box body; 711, opening; 72, fixed sleeve; 73, bidirectional screw; 74, threaded sleeve; 75, worm wheel; 76, first L-shaped frame; 77, worm; 771, knob; 8, first gate plate; 81, second L-shaped plate; 9, second gate plate; 91, third L-shaped plate; 10, handle. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] The following will be described in detail with reference to the drawings in the embodiments of the present application, Figures 1-4 The present application will be described in further detail,

[0025] The embodiments of the present application disclose a gate valve with double gate plates. Referring to Figures 1-4The utility model provides a gate valve with double gate plates, which comprises a valve body 1, a valve cover 2 installed on the valve body 1 through bolts 11, a support frame 3 installed on the upper end of the valve cover 2, a threaded cylinder 4 rotatably installed on the support frame 3 through bearings, a valve rod 5 installed on the threaded cylinder 4 through threads, a buffer structure 6 arranged on the lower end of the valve rod 5, a replacement structure 7 installed on the lower end of the buffer structure 6 and inside the valve body 1, and a first gate plate 8 and a second gate plate 9 symmetrically installed on the left and right sides of the replacement structure 7.

[0026] The replacement structure 7 comprises a box body 71, fixed sleeves 72 symmetrically installed on the bottom of the inner cavity of the box body 71, a bidirectional screw rod 73 installed on the two groups of fixed sleeves 72 through bearings, a threaded sleeve 74 and a worm wheel 75 installed on the front end of the bidirectional screw rod 73 connected with the threaded sleeve 74 through threads on the front and rear sides of the bidirectional screw rod 73, first L-shaped frames 76 symmetrically installed on the left and right side walls of the threaded sleeve 74, and a worm 77 rotatably installed on the bottom of the inner cavity of the box body 71 through bearings. The two groups of threaded sleeves 74 are synchronously moved away from and close to each other by being positively and reversely rotated through the bidirectional screw rod 73, so that the two groups of second L-shaped plates 81 and the two groups of third L-shaped plates 91 are loosened and fixed, the function of quickly replacing the first gate plate 8 and the second gate plate 9 is realized, and the problem that the gate plates on the existing double-gate-plate gate valve are mostly fixedly installed, the gate plates are severely worn and need to be replaced after the gate valve is used for a long time, and the fixedly installed gate plates are very inconvenient to replace is solved.

[0027] With reference to Figure 3 and Figure 4 , the buffer structure 6 comprises an inner rod 61 installed on the lower end of the valve rod 5, a buffer spring 62 installed on the lower end of the valve rod 5 and outside the inner rod 61, and a cylinder rod 63 slidably installed on the lower side outer wall of the buffer spring 62. The front side of the bidirectional screw rod 73 is a left-hand screw rod, and the rear side of the bidirectional screw rod 73 is a right-hand screw rod.

[0028] The front side of the bidirectional screw rod 73 is a left-hand screw rod, the rear side of the bidirectional screw rod 73 is a right-hand screw rod, and the bidirectional screw rod 73 can drive the two threaded sleeves 74 on the front and rear sides to synchronously move away from or close to each other by being positively and reversely rotated, so that the first gate plate 8 and the second gate plate 9 are conveniently and quickly replaced.

[0029] With reference to Figures 3-4 , a through hole is formed in the end face of the box body 71, the upper end of the worm 77 penetrates through the through hole and extends above the box body 71, and a knob 771 is arranged on the upper end of the worm 77. The worm wheel 75 and the worm 77 are connected in a meshing mode, a handle 10 is installed on the threaded cylinder 4, openings 711 are symmetrically formed in the left and right side walls of the box body 71, the box body 71 is slidably connected with the first L-shaped frames 76 through the knob 771, second L-shaped plates 81 adapted to the left first L-shaped frames 76 are symmetrically installed on the first gate plate 8, and third L-shaped plates 91 adapted to the right first L-shaped frames 76 are symmetrically installed on the second gate plate 9.

[0030] Wherein, through the setting of the opening 711, the bidirectional screw rod 73 drives the threaded sleeve 74 to rotate, and because the left and right first L-shaped frames 76 are located in the opening 711, the bidirectional screw rod 73 drives the threaded sleeve 74 to move forward and backward, thereby achieving the quick disassembly and fixation of the second L-shaped plate 81 and the third L-shaped plate 91;

[0031] With reference to Figure 2 And Figure 4 The lower end of the buffer spring 62 is connected with the upper end of the cylinder rod 63, and the lower end of the cylinder rod 63 is connected with the end face of the box body 71; the lower side outer wall of the inner rod 61 is symmetrically provided with a limiting plate 611, and the inner wall of the cylinder rod 63 is provided with a sliding groove 631 in sliding connection with the limiting plate 611;

[0032] Wherein, through the limiting plate 611 and the sliding groove 631, the movement range of the inner rod 61 is limited, so that the inner rod 61 can only move up and down in the cylinder rod 63, and the lower end of the valve rod 5 compresses the buffer spring 62, thereby buffering the impact force of the connection of the first gate plate 8, the second gate plate 9 and the valve body 1;

[0033] Working principle: the user drives the knob 771 to rotate forward, the worm 77 drives the worm wheel 75 to rotate, the worm wheel 75 drives the bidirectional screw rod 73 to rotate forward on the fixed sleeve 72, the two groups of threaded sleeves 74 are driven by the bidirectional screw rod 73 to move away synchronously, the left and right first L-shaped frames 76 on the front and rear threaded sleeves 74 are removed from the second L-shaped plate 81 and the third L-shaped plate 91, the first gate plate 8 drives the second L-shaped plate 81 to be quickly taken out from the left opening 711, and the second gate plate 9 drives the third L-shaped plate 91 to be quickly taken out from the right opening 711, then the new first gate plate 8, the second L-shaped plate 81, the second gate plate 9 and the third L-shaped plate 91 are replaced, the first gate plate 8 drives the two groups of second L-shaped plates 81 to enter the left opening 711, the second gate plate 9 drives the two groups of third L-shaped plates 91 to enter the right opening 711, then the knob 771 drives the worm 77 to rotate reversely, and the front and rear threaded sleeves 74 drive the left and right first L-shaped frames 76 to enter the second L-shaped plate 81 and the third L-shaped plate 91, thereby clamping the second L-shaped plate 81 and the third L-shaped plate 91, so as to realize the quick replacement function of the first gate plate 8 and the second gate plate 9, solve the problem that the valve plate on the existing double gate plate gate valve is mostly fixedly installed, the valve plate needs to be replaced after long-time use of the gate valve, and the fixedly installed valve plate is very inconvenient to replace, shorten the valve maintenance time, and improve the replacement efficiency of the valve plate;

[0034] The valve rod 5 drives the buffer structure 6 to move downward, the buffer structure 6 moves downward with the replacement structure 7, the replacement structure 7 drives the first gate plate 8 and the second gate plate 9 to be connected with the valve seat of the valve body 1, when the first gate plate 8 and the second gate plate 9 are contacted, the first gate plate 8 and the second gate plate 9 are driven to move upward by the transmission of the replacement structure 7, the cylinder rod 63 moves upward and compresses the buffer spring 62, the buffer spring 62 can effectively buffer the impact force when the first gate plate 8 and the second gate plate 9 are connected with the valve body 1, the lower end of the inner rod 61 continues to move to the bottom of the inner cavity of the cylinder rod 63, the first gate plate 8 and the second gate plate 9 are tightly connected with the valve seat of the valve body 1, the closing of the gate is realized, and the buffer effect is realized when the first gate plate 8, the second gate plate 9 and the valve body 1 are connected, the problem that the existing double gate plate gate valve lacks a buffer device is solved, the problem that a large impact force is generated when the valve rod drives the valve plate to be connected with the valve seat, the valve plate and the valve seat are seriously worn is solved, the wear is reduced, and the service life of the gate valve is prolonged.

[0035] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the industry that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed.

Claims

1. A gate valve with double flashboard, comprising a valve body (1), characterized in that: The valve body (1) is installed with a valve cover (2) through a bolt (11), the upper end of the valve cover (2) is installed with a support frame (3), the support frame (3) is rotatably installed with a threaded cylinder (4) through a bearing, the threaded cylinder (4) is installed with a valve rod (5) through a thread, the lower end of the valve rod (5) is provided with a buffer structure (6), the lower end of the buffer structure (6) and inside the valve body (1) is installed with a replacement structure (7), the left and right sides of the replacement structure (7) are symmetrically installed with a first shutter (8) and a second shutter (9); The replacement structure (7) comprises a box body (71), the inner cavity bottom of the box body (71) is symmetrically installed with a fixed sleeve (72), two groups of the fixed sleeve (72) are installed with a bidirectional screw rod (73) through a bearing, the front and rear sides of the bidirectional screw rod (73) are connected with a threaded sleeve (74) and a worm wheel (75) installed at the front end of the bidirectional screw rod (73) through a thread, the left and right side walls of the threaded sleeve (74) are symmetrically installed with a first L-shaped frame (76), the inner cavity bottom of the box body (71) is rotatably installed with a worm gear (77) through a bearing.

2. A gate valve having double flashboard according to claim 1, characterized in that: The buffer structure (6) comprises an inner rod (61) installed at the lower end of the valve rod (5), the lower end of the valve rod (5) is installed with a buffer spring (62) outside the inner rod (61), the lower side outer wall of the buffer spring (62) is slidably installed with a cylinder rod (63).

3. A gate valve having double flashboard according to claim 1, characterized in that: The front side of the bidirectional screw rod (73) is a left-handed screw rod, and the rear side of the bidirectional screw rod (73) is a right-handed screw rod.

4. A gate valve having double flashboard according to claim 1, characterized in that: The end face of the box body (71) is provided with a through hole, the upper end of the worm gear (77) penetrates through the through hole and extends above the box body (71), and the upper end of the worm gear (77) is provided with a knob (771).

5. A gate valve having double flashboard according to claim 1, characterized in that: The connection mode of the worm wheel (75) and the worm gear (77) is meshing connection, a handle (10) is installed on the threaded cylinder (4), the left and right side walls of the box body (71) are symmetrically provided with openings (711), and the box body (71) is slidably connected with the first L-shaped frame (76) through the knob (771).

6. A gate valve having double flashboard according to claim 1, characterized in that: Second L-shaped plates (81) matched with the left first L-shaped frame (76) are symmetrically installed on the first shutter (8), and third L-shaped plates (91) matched with the right first L-shaped frame (76) are symmetrically installed on the second shutter (9).

7. A gate valve having double flashboard according to claim 2, characterized in that: The lower end of the buffer spring (62) is connected with the upper end of the cylinder rod (63), and the lower end of the cylinder rod (63) is connected with the end face of the box body (71).

8. A gate valve having double flashboard according to claim 2, characterized in that: Limiting plates (611) are symmetrically installed on the lower side outer wall of the inner rod (61), and a sliding groove (631) slidably connected with the limiting plates (611) is formed in the inner wall of the cylinder rod (63).

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