CN212455563U

CN212455563U - Water hammer-proof gate valve

Info

Publication number: CN212455563U
Application number: CN202021170491.1U
Authority: CN
Inventors: 王高山
Original assignee: Eryue Valve Technology Co ltd
Current assignee: Eryue Valve Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-02-02
Anticipated expiration: 2030-06-22

Abstract

The utility model provides a water hammer-proof gate valve with reasonable structural design and capable of reducing the destructive power of a water hammer, which comprises a valve body, a flashboard and a valve rod, wherein the valve body is provided with a water inlet channel and a water outlet channel, the flashboard is arranged between the water inlet channel and the water outlet channel, the lower end part of the valve rod is connected with the flashboard, the upper end part of the valve body is provided with a first opening, the first opening is provided with a valve cover, the valve cover and the valve body form a cavity, the valve cover is provided with a second opening, the upper end part of the valve rod is connected with an opening and closing device, valve seats are respectively arranged between the two end surfaces of the flashboard and the valve body, the valve seats are provided with water passing ports, the valve seats are arranged on the valve body, an annular sealing channel is formed between the two valve seats, the water hammer-proof device is, the middle part of the pipe body is provided with a bulge along the circumferential direction, and the elastic inner sleeve layer is positioned at the bulge position and can be bent towards the bulge inner wall.

Description

Water hammer-proof gate valve

Technical Field

The utility model relates to a valve class technical field, in particular to waterproof hammer gate valve.

Background

A gate valve is a valve for the conduction and cutoff of a pipe. Because the performance is reliable, opens and close moment advantage such as little, so use comparatively generally. Water hammer is also called water hammer. The phenomenon that the liquid flowing in the pressure pipe undergoes a sudden change in flow rate due to the sudden closing of the valve and undergoes an alternating change of a sudden increase or decrease in pressure due to the inertia of the liquid, i.e., a pressure wave, is called a water hammer. Because the inner wall of the pipeline is smooth, water flows freely. When the opened valve is closed suddenly, the follow-up water flow continues to flow under the action of inertia, after the flow is stopped, the water in the pipeline flows back in the reverse direction, at the moment, great impact force and water pressure can be generated on the valve and the pipeline, and a destructive effect is generated. The water hammer effect is extremely destructive, and too high a pressure in the pipeline will cause the pipeline to break, whereas too low a pressure in the pipeline will cause the pipeline to collapse, and the valve will be damaged.

In order to solve the above problems, the present invention has been made in view of the above.

SUMMERY OF THE UTILITY MODEL

Therefore, to foretell problem, the utility model provides a structural design is reasonable, can reduce the water hammer destructive power's waterproof hammer gate valve.

In order to solve the technical problem, the utility model adopts the solution that the water hammer-proof gate valve comprises a valve body, a flashboard and a valve rod, wherein the valve body is provided with a water inlet channel and a water outlet channel, the flashboard can be arranged between the water inlet channel and the water outlet channel in a sliding way up and down, the lower end part of the valve rod is connected with the flashboard, the upper end part of the valve body is provided with a first opening for the flashboard and the valve rod to pass through, the first opening is provided with a valve cover, the valve cover is arranged on the valve body, a first sealing device is arranged between the valve cover and the valve body, the valve cover and the valve body form a cavity for the flashboard to ascend, the valve cover is provided with a second opening for the valve rod to pass through, a second sealing device is arranged between the valve cover and the valve rod, the upper end part of the valve rod is connected with an, the water inlet has been seted up on the disk seat, the disk seat set up in on the valve body, two form the annular seal passageway that is used for sealed flashboard between the disk seat, be provided with third sealing device between disk seat and the flashboard, it is provided with waterproof hammer device to lie in inhalant canal one side on the valve body, waterproof hammer device includes the body, body one end set up in on the valve body, the body with inhalant canal is linked together, the inside laminating inner wall of body is provided with elasticity inner jacket layer, the body middle part is provided with the arch along circumference, elasticity inner jacket level in protruding position can to protruding inner wall is crooked.

The further improvement is that: elastic lugs are arranged on the two end parts of the elastic inner sleeve layer in the direction perpendicular to the central line of the elastic inner sleeve layer, and the elastic lugs are attached to the two end parts of the pipe body.

The further improvement is that: and the two sides of the lower end part of the pipe body on the protrusion are respectively provided with a ventilating groove.

The further improvement is that: the protrusion is a U-shaped protrusion.

The further improvement is that: the elastic inner sleeve layer is located at the U-shaped protruding position and is provided with a plurality of U-shaped grooves connected end to end.

The further improvement is that: the bulges are arc bulges.

The further improvement is that: the elastic inner sleeve layer is located the arc-shaped protruding position is provided with a plurality of end-to-end V-shaped grooves, the V-shaped grooves are located one side of the water inlet end of the pipe body is a vertical edge perpendicular to the central line of the pipe body, and one side of the water outlet end of the pipe body inclines along the center of the pipe body in the water flowing direction.

The further improvement is that: the opening and closing device including set up in fixing base on the valve gap, the rotatable sleeve that rotates that is provided with on the fixing base, rotate the sleeve with be provided with fourth sealing device between the fixing base, it supplies to have seted up in the rotation sleeve the screw thread passageway that the valve rod passed, be provided with on the valve rod with screw thread passageway matched with external screw thread, the cover is equipped with and is used for the drive on the rotation sleeve rotate sleeve pivoted driving piece.

The further improvement is that: a valve rod protective shell is arranged above the rotating sleeve, the lower end of the valve rod protective shell is arranged on the rotating sleeve, and the inside of the valve rod protective shell is communicated with the threaded passage.

The further improvement is that: the driving piece is a hand wheel, and the hand wheel is fixedly sleeved on the rotating sleeve.

By adopting the technical scheme, the beneficial effects of the utility model are that: use the utility model has the advantages of it is following:

1. the utility model provides an elasticity endotheca layer can be after the valve is closed and the hydraulic pressure in the water supply pipe change and rise or shrivel, and the elasticity of elasticity endotheca layer itself can be confronted with the water hammer, slows down the water hammer effect, reduces the destructive power of water hammer effect to the water supply pipe.

2. The elastic inner sleeve layer limits the maximum range within which the elastic inner sleeve layer can be expanded under the limitation of the U-shaped bulge or the arc-shaped bulge of the pipe body, so that the elastic inner sleeve layer can be prevented from being expanded and broken.

3. The elastic inner sleeve layer is provided with a sealing structure between the U-shaped bulge or the arc bulge, the gas between the elastic inner sleeve layer and the pipe body can be communicated with the external atmospheric pressure through the set ventilation groove, the phenomenon that the pipe body is broken due to the fact that the gas between the elastic inner sleeve layer and the pipe body is excessively compressed when the elastic inner sleeve layer rises due to the change of the pressure in the pipe is avoided, and the pipe body can be effectively protected through the set ventilation groove.

4. The ventilation grooves are formed in the positions of two sides of the bottom of the U-shaped bulge or the arc-shaped bulge, but not in the middle of the bottom of the U-shaped bulge or the arc-shaped bulge, the ventilation effect of the ventilation grooves can be prevented from being influenced by blocking of the ventilation grooves when the elastic inner sleeve layer rises towards the inner wall of the pipe body, and the ventilation grooves are formed in the bottom of the pipe body, so that a large amount of dust and particles can be prevented from entering the pipe.

5. The elasticity lug that sets up on the body both ends can strengthen the leakproofness between body and the valve body to and the leakproofness between body and the water supply pipe, can carry on spacingly to elasticity inner jacket layer simultaneously, avoid elasticity inner jacket layer to shift for the body because the production of water hammer.

Drawings

Fig. 1 is a front view of a water hammer-proof gate valve according to an embodiment of the present invention.

Fig. 2 is an internal structure schematic diagram of a water hammer-proof gate valve according to the present invention.

Fig. 3 is a front view of the second water hammer prevention gate valve according to the embodiment of the present invention.

Fig. 4 is an internal structure schematic diagram of a second water hammer prevention gate valve according to the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 2, a first disclosure of the embodiment of the present invention is a water hammer-proof gate valve, including a valve body 10, a gate plate 11, and a valve rod 12, wherein the valve body 10 is provided with a water inlet channel 13 and a water outlet channel 14, the gate plate 11 is slidably disposed between the water inlet channel 13 and the water outlet channel 14 up and down, a lower end of the valve rod 12 is connected to the gate plate 11, an upper end of the valve body 10 is provided with a first opening 15 for the gate plate 11 and the valve rod 12 to pass through, the first opening 15 is provided with a valve cover 16, the valve cover 16 is tightly mounted on the valve body 10 by a first fastening bolt, a first sealing device is disposed between the valve cover 16 and the valve body 10, the first sealing device is a first sealing ring 17, the valve cover 16 is provided with a first mounting groove for mounting the first sealing ring 17, the first sealing ring 17 is disposed in the first mounting groove, the outer ring wall of the first sealing ring 17 is clamped in a first mounting groove, the inner ring wall is in extrusion fit with the valve body 10, the inner wall of the valve cover 16 and the valve body 10 form a cavity 18 for the gate plate 11 to rise, the valve cover 16 is provided with a second opening 19 for the valve rod 12 to penetrate out, a second sealing device is arranged between the valve cover 16 and the valve rod 12, the second sealing device is a second sealing ring 20, the valve cover 16 is provided with a second mounting groove for mounting the second sealing ring 20, the second sealing ring 20 is arranged in the second mounting groove, the outer ring wall of the second sealing ring 20 is clamped in the second mounting groove, the inner ring wall is in extrusion fit with the valve rod 12, the upper end of the valve rod 12 is connected with an opening and closing device for driving the gate plate 11 to move up and down, valve seats 21 are respectively arranged between two end faces of the gate plate 11 and the valve body 10, and a water passing port 22 is, the utility model discloses a valve seat 21, including valve seat 21, second valve seat 21, third sealing device 24, lower tip outer lane wall with the extrusion laminating of valve body 10, be provided with fifth sealing device between valve seat 21 and the flashboard 11, the annular seal passageway 23 that is used for sealed flashboard 11 is formed between valve seat 21, be provided with third sealing device between valve seat 21 and the flashboard 11, the third sealing device is third sealing washer 24, offer on the valve seat 21 and be used for the installation the third mounting groove of third sealing washer 24, third sealing washer 24 set up in the third mounting groove, lower tip outer lane wall with the extrusion laminating of valve body 10, be provided with fifth sealing device between valve seat 21 and the valve body 10, fifth sealing device is fifth sealing washer 41, offer on the valve seat 21 and be used for the installation the fifth mounting groove of fifth sealing washer 41, fifth sealing washer 41 block.

The opening and closing device comprises a fixed seat 25 arranged on the valve cover 16, the fixed seat 25 is fastened on the valve cover 16 through a second fastening bolt, a rotating sleeve 26 is rotatably arranged on the fixed seat 25, a rotating channel 27 is arranged on the mounting seat, the lower end part of the rotating sleeve 26 is rotatably arranged on the fixed seat 25, a first limiting boss 28 is arranged on the inner wall of the upper end part of the rotating channel 27, a second limiting boss 29 matched with the first limiting boss 28 is arranged at the lower end part of the rotating sleeve, a fourth sealing device is arranged between the rotating sleeve 26 and the fixed seat 25, the fourth sealing device comprises two fourth sealing rings 30, fourth mounting grooves for mounting the fourth sealing rings 30 are respectively arranged on the inner wall of the rotating channel 27 above and below the second limiting boss 29, the fourth sealing ring 30 is arranged in the fourth mounting groove, the outer ring wall of the fourth sealing ring 30 is clamped in the fourth mounting groove, the inner ring wall of the fourth sealing ring 30 is attached to the valve rod 12 in an extruding manner, a thread passage 31 for the valve rod 12 to pass through is formed in the rotating sleeve 26, an external thread 32 matched with the thread passage 31 is arranged on the valve rod 12, a valve rod protective shell 33 is arranged above the rotating sleeve 26, the lower end of the valve rod protective shell 33 is arranged on the rotating sleeve 26 through thread connection, an external thread is arranged at the upper end of the rotating sleeve 26, an internal thread matched with the external thread is arranged on the inner wall of the valve rod protective shell 33, the inside of the valve rod protective shell 33 is communicated with the thread passage 31, and a driving piece for driving the rotating sleeve 26 to rotate is sleeved on the rotating sleeve 26, the driving piece is a hand wheel 34, and the hand wheel 34 is fixedly sleeved on the rotating sleeve 26.

A waterproof hammer device is arranged on one side of the water inlet channel 13 on the valve body 10 and comprises a pipe body 35, one end of the pipe body 35 is arranged on the valve body 10, the pipe body 35 is communicated with the water inlet channel 13, an elastic inner sleeve layer 36 is arranged on the inner wall of the pipe body 35 in a fit mode, the elastic inner sleeve layer 36 is made of food-grade silicone tubes, a bulge is arranged in the middle of the pipe body 35 along the circumferential direction and is a U-shaped bulge 37, the elastic inner sleeve layer 36 is located at the bulge position and can bend towards the inner wall of the bulge, a plurality of U-shaped grooves 38 which are connected end to end are arranged on the position of the U-shaped bulge 37, the surface area of the elastic inner sleeve layer 36 after the U-shaped grooves 38 are arranged is larger than that of the elastic inner sleeve layer 36 when the U-shaped grooves 38 are not arranged, when the water pressure in the pipe body 35 is increased, the water pressure can enable the U-shaped grooves 38 to rise to bend towards the inner wall of, the pipe 35 at other positions of the water supply pipeline is prevented from being burst by water pressure, meanwhile, the elastic inner jacket layer 36 has certain elastic force, can resist the water pressure in the pipe 35, eliminates a part of the water pressure, the elastic inner jacket layer 36 can also correspondingly recover to the original shape after the water pressure is normal, the elastic inner jacket layer 36 limits the maximum range in which the elastic inner jacket layer 36 can rise under the limitation of the U-shaped bulge 37 of the pipe 35, and can prevent the elastic inner jacket layer 36 from being burst, the two sides of the lower end part of the pipe 35 on the U-shaped bulge 37 are respectively provided with a ventilation groove 39, the elastic inner jacket layer 36 and the U-shaped bulge 37 arranged on the inner wall of the pipe 35 are of a sealing structure, the ventilation groove 39 can communicate the gas between the elastic inner jacket layer 36 and the pipe 35 with the external atmospheric pressure, and prevent the pipe 35 from being burst caused by the over-compression of the gas between the elastic inner jacket layer 36 and the pipe 35 when the inner jacket layer 36 rises due to the change of the internal pressure, meanwhile, the ventilation grooves 39 are arranged at two sides of the bottom of the U-shaped protrusion 37 instead of the middle position, so that the ventilation effect of the ventilation grooves 39 can be prevented from being influenced by blocking the ventilation grooves 39 when the elastic inner sleeve layer 36 expands towards the inner wall of the tube body 35, the ventilation grooves 39 are arranged at the bottom position, dust and a large amount of particles can be prevented from entering the tube body 35, elastic lugs 40 are arranged on two end parts of the elastic inner sleeve layer 36 in a direction perpendicular to the central line of the elastic inner sleeve layer 36, the elastic lugs 40 are attached to two end parts of the tube body 35, the tube body 35 is connected with the valve body 10 through flanges respectively arranged on the tube body 35 and the valve body 10, the tube body 35 and the valve body 10 are fixed together through bolts, and the elastic lugs 40 arranged on the two end parts of the tube body 35 can enhance the sealing performance between the tube body 35 and the valve body 10 and the sealing, meanwhile, the elastic inner sleeve layer 36 can be limited, the elastic inner sleeve layer 36 is prevented from shifting relative to the pipe body 35 due to the generation of a water hammer, and the U-shaped groove 38 in the elastic inner sleeve layer 36 and the U-shaped protrusion 37 in the pipe body 35 are prevented from shifting mutually to influence the effect of the waterproof hammer.

Referring to fig. 3 to 4, a second embodiment of the present invention discloses a water hammer-proof gate valve, which includes a valve body 10, a gate plate 11, and a valve rod 12, wherein the valve body 10 is provided with a water inlet channel 13 and a water outlet channel 14, the gate plate 11 is slidably disposed between the water inlet channel 13 and the water outlet channel 14, a lower end of the valve rod 12 is connected to the gate plate 11, an upper end of the valve body 10 is provided with a first opening 15 for the gate plate 11 and the valve rod 12 to pass through, the first opening 15 is provided with a valve cover 16, the valve cover 16 is fastened and mounted on the valve body 10 by a first fastening bolt, a first sealing device is disposed between the valve cover 16 and the valve body 10, the first sealing device is a first sealing ring 17, the valve cover 16 is provided with a first mounting groove for mounting the first sealing ring 17, the first sealing ring 17 is disposed in the first mounting groove, the outer ring wall of the first sealing ring 17 is clamped in a first mounting groove, the inner ring wall is in extrusion fit with the valve body 10, the inner wall of the valve cover 16 and the valve body 10 form a cavity 18 for the gate plate 11 to rise, the valve cover 16 is provided with a second opening 19 for the valve rod 12 to penetrate out, a second sealing device is arranged between the valve cover 16 and the valve rod 12, the second sealing device is a second sealing ring 20, the valve cover 16 is provided with a second mounting groove for mounting the second sealing ring 20, the second sealing ring 20 is arranged in the second mounting groove, the outer ring wall of the second sealing ring 20 is clamped in the second mounting groove, the inner ring wall is in extrusion fit with the valve rod 12, the upper end of the valve rod 12 is connected with an opening and closing device for driving the gate plate 11 to move up and down, valve seats 21 are respectively arranged between two end faces of the gate plate 11 and the valve body 10, and a water passing port 22 is, the disk seat 21 set up in on the valve body 10, two form the annular seal passageway 23 that is used for sealed flashboard 11 between the disk seat 21, be provided with third sealing device between disk seat 21 and the flashboard 11, the third sealing device is third sealing washer 24, offer on the disk seat 21 and be used for the installation the third mounting groove of third sealing washer 24, third sealing washer 24 set up in the third mounting groove, the 24 inner ring walls of third sealing washer block in the third mounting groove, lower tip outer ring walls with the extrusion laminating of valve body 10.

The opening and closing device comprises a fixed seat 25 arranged on the valve cover 16, the fixed seat 25 is fastened on the valve cover 16 through a second fastening bolt, a rotating sleeve 26 is rotatably arranged on the fixed seat 25, a rotating channel 27 is arranged on the mounting seat, the lower end part of the rotating sleeve 26 is rotatably arranged on the fixed seat 25, a first limiting boss 28 is arranged on the inner wall of the upper end part of the rotating channel 27, a second limiting boss 29 matched with the first limiting boss 28 is arranged at the lower end part of the rotating sleeve, a fourth sealing device is arranged between the rotating sleeve 26 and the fixed seat 25, the fourth sealing device comprises two fourth sealing rings 30, fourth mounting grooves for mounting the fourth sealing rings 30 are respectively arranged on the inner wall of the rotating channel 27 above and below the second limiting boss 29, the fourth sealing ring 30 is arranged in the fourth mounting groove, the outer ring wall of the fourth sealing ring 30 is clamped in the fourth mounting groove, the inner ring wall of the fourth sealing ring 30 is attached to the valve rod 12 in an extruding manner, a thread passage 31 for the valve rod 12 to pass through is formed in the rotating sleeve 26, an external thread matched with the thread passage 31 is arranged on the valve rod 12, a valve rod protective shell 33 is arranged above the rotating sleeve 26, the lower end of the valve rod protective shell 33 is arranged on the rotating sleeve 26 through thread connection, an external thread is arranged at the upper end of the rotating sleeve 26, an internal thread matched with the external thread is arranged on the inner wall of the valve rod protective shell 33, the inside of the valve rod protective shell 33 is communicated with the thread passage 31, and a driving piece for driving the rotating sleeve 26 to rotate is sleeved on the rotating sleeve 26, the driving piece is a hand wheel 34, and the hand wheel 34 is fixedly sleeved on the rotating sleeve 26.

The water hammer preventing device is arranged on one side, located on the water inlet channel 13, of the valve body 10 and comprises a pipe body 35, one end of the pipe body 35 is arranged on the valve body 10, the pipe body 35 is communicated with the water inlet channel 13, an elastic inner sleeve layer 36 is arranged on the inner attached wall inside the pipe body 35, the elastic inner sleeve layer 36 is made of food-grade silicone tubes, a protrusion is arranged in the middle of the pipe body 35 along the circumferential direction and is an arc-shaped protrusion 37 ', the elastic inner sleeve layer 36 is located on the arc-shaped protrusion 37 ' and can be bent towards the inner wall of the protrusion, a plurality of V-shaped grooves 38 ' which are connected end to end are arranged on the position of the arc-shaped protrusion 37 ', the V-shaped grooves 38 ' are located on one side, located on the water inlet end of the pipe body 35, of the vertical edges perpendicular to the central line of the pipe body 35, and are located on one side, under the condition of normal water supply, the flow rate of water at the center of the pipeline is the fastest, the center of the pipe body 35 is inclined along the water flowing direction at one side of the V-shaped groove 38 'so as not to influence the supply of the water, when the valve is closed, the impact force of the water in the middle of the pipe body 35 is the largest, the backflow water is driven to flow towards the inner wall direction of the elastic inner sleeve layer 36, after the backflow water flows to the position of the V-shaped groove 38', the backflow speed of the water is reduced under the blocking of the vertical edge of the central line of the pipe body 35 at the other side of the V-shaped groove 38 ', so that the backflow water can act on the V-shaped groove 38' of the elastic inner sleeve layer 36 at the first time, the other parts of the water supply pipe are prevented from being damaged by the backflow water, the surface area of the elastic inner sleeve layer 36 after the V-shaped groove 38 'is arranged is larger than the surface area of the elastic inner sleeve layer 36 when the V-shaped groove 38' is not arranged, when the water pressure, the water pressure is prevented from breaking the pipe body 35 at other positions of the water supply pipeline, meanwhile, the elastic inner jacket layer 36 has a certain elastic force to resist the water pressure in the pipe body 35 and eliminate a part of the water pressure, the elastic inner jacket layer 36 can also be correspondingly restored to the original shape after the water pressure is normal, the elastic inner jacket layer 36 limits the maximum range in which the elastic inner jacket layer 36 can be expanded under the limitation of the arc-shaped bulge 37 ' of the pipe body 35, the elastic inner jacket layer 36 can be prevented from being expanded and broken, the two sides of the lower end part of the pipe body 35 on the arc-shaped bulge 37 ' are respectively provided with a ventilation groove 39, the elastic inner jacket layer 36 and the arc-shaped bulge 37 ' arranged on the inner wall of the pipe body 35 are of a sealing structure, the ventilation groove 39 is arranged to enable the gas between the elastic inner jacket layer 36 and the pipe body 35 to be communicated with the external atmospheric pressure, and the rupture of the pipe body 35 caused by the over-compression of the gas between the elastic inner jacket layer 36 and the pipe body 35 when, meanwhile, the ventilation grooves 39 are arranged at two sides of the bottom of the arc-shaped protrusion 37', but not at the middle position, so that the ventilation effect of the ventilation grooves 39 can be prevented from being influenced by blocking the ventilation grooves 39 when the elastic inner sleeve layer 36 expands towards the inner wall of the pipe body 35, the ventilation grooves 39 are arranged at the bottom position, and a large amount of dust and particles can be prevented from entering the pipe body 35, the elastic lugs 40 are arranged at two end parts of the elastic inner sleeve layer 36 in a direction perpendicular to the central line of the elastic inner sleeve layer 36, the elastic lugs 40 are attached to two end parts of the pipe body 35, the pipe body 35 is connected with the valve body 10 through flanges respectively arranged on the pipe body 35 and the valve body 10, the pipe body 35 and the valve body 10 are fixed together through bolts, and the elastic lugs 40 arranged at the two end parts of the pipe body 35 can enhance the sealing performance between the pipe body 35 and the valve body, meanwhile, the elastic inner sleeve layer 36 can be limited, the elastic inner sleeve layer 36 is prevented from shifting relative to the pipe body 35 due to the generation of a water hammer, and the V-shaped groove 38 'in the elastic inner sleeve layer 36 and the arc-shaped protrusion 37' in the pipe body 35 are prevented from shifting mutually to influence the effect of the water hammer.

The utility model discloses a use method is connected body 35 of waterproof hammer device and valve body 10 of stop valve, later with the pipe connection of body 35 of waterproof device and valve body 10 of stop valve and the delivery pipe. When the valve is opened, the hand wheel 34 is rotated clockwise, the hand wheel 34 drives the rotating sleeve 26 to rotate forward, the valve rod 12 is driven to move upwards, the upper end of the valve rod 12 can enter the valve rod protective shell 33, and meanwhile, the valve rod 12 drives the flashboard 11 to move upwards to penetrate through the first opening 15 in the valve body 10 and enter the cavity 18 between the valve body 10 and the valve cover 16, so that the water inlet channel 13 is communicated with the water outlet channel 14. When the valve is closed, the hand wheel 34 is rotated anticlockwise, the hand wheel 34 drives the rotating sleeve 26 to rotate reversely, the upper end of the valve rod 12 is driven to be separated from the valve rod protective shell 33 to move downwards, meanwhile, the valve rod 12 drives the flashboard 11 to move downwards, the flashboard 11 penetrates through the first opening 15 in the valve body 10 and is inserted between the two valve seats 21, the side edge of the flashboard 11 is inserted into the annular sealing channel 23, and the water inlet channel 13 and the water outlet channel 14 are blocked.

After the water inlet channel 13 and the water outlet channel 14 are blocked, water in the water supply pipeline is continuously supplied, so that the water pressure in the water inlet channel 13 of the valve body 10 can be increased to generate a water hammer effect to damage the water supply pipeline, the pressure in the pipeline can be reduced under the elastic action of the elastic inner sleeve layer 36 in the waterproof hammer device, the water hammer effect is relieved, and the water supply pipeline is protected.

Having shown and described the basic principles and essential features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but is susceptible to various changes and modifications without departing from the spirit and scope of the invention, all of which are intended to be covered by the appended claims and their equivalents.

Claims

1. A water hammer-proof gate valve comprises a valve body, a gate plate and a valve rod, wherein the valve body is provided with a water inlet channel and a water outlet channel, the gate plate can be arranged between the water inlet channel and the water outlet channel in a vertically sliding mode, the lower end of the valve rod is connected with the gate plate, the upper end of the valve body is provided with a first opening through which the gate plate and the valve rod can penetrate, a valve cover is arranged on the first opening, the valve cover is arranged on the valve body, a first sealing device is arranged between the valve cover and the valve body, the valve cover and the valve body form a cavity through which the gate plate can ascend, the valve cover is provided with a second opening through which the valve rod penetrates, a second sealing device is arranged between the valve cover and the valve rod, the upper end of the valve rod is connected with an opening and closing device for driving the gate plate to move vertically, the disk seat set up in on the valve body, two form the annular seal passageway that is used for sealed flashboard between the disk seat, be provided with third sealing device, its characterized in that between disk seat and the flashboard: the water hammer preventing device is arranged on one side, located on the water inlet channel, of the valve body and comprises a pipe body, one end of the pipe body is arranged on the valve body, the pipe body is communicated with the water inlet channel, an elastic inner sleeve layer is arranged on the inner wall, attached to the inside of the pipe body, a protrusion is arranged in the middle of the pipe body along the circumferential direction, and the elastic inner sleeve layer is located at the protruding position and can bend towards the protruding inner wall.

2. The water hammer resistant gate valve of claim 1, wherein: elastic lugs are arranged on the two end parts of the elastic inner sleeve layer in the direction perpendicular to the central line of the elastic inner sleeve layer, and the elastic lugs are attached to the two end parts of the pipe body.

3. The water hammer-proof gate valve according to claim 1 or 2, wherein: and the two sides of the lower end part of the pipe body on the protrusion are respectively provided with a ventilating groove.

4. The water hammer resistant gate valve of claim 3, wherein: the protrusion is a U-shaped protrusion.

5. The water hammer resistant gate valve of claim 4, wherein: the elastic inner sleeve layer is located at the U-shaped protruding position and is provided with a plurality of U-shaped grooves connected end to end.

6. The water hammer resistant gate valve of claim 3, wherein: the bulges are arc bulges.

7. The water hammer resistant gate valve of claim 6, wherein: the elastic inner sleeve layer is located the arc-shaped protruding position is provided with a plurality of end-to-end V-shaped grooves, the V-shaped grooves are located one side of the water inlet end of the pipe body is a vertical edge perpendicular to the central line of the pipe body, and one side of the water outlet end of the pipe body inclines along the center of the pipe body in the water flowing direction.

8. The water hammer resistant gate valve of claim 1, wherein: the opening and closing device including set up in fixing base on the valve gap, the rotatable sleeve that rotates that is provided with on the fixing base, rotate the sleeve with be provided with fourth sealing device between the fixing base, it supplies to have seted up in the rotation sleeve the screw thread passageway that the valve rod passed, be provided with on the valve rod with screw thread passageway matched with external screw thread, the cover is equipped with and is used for the drive on the rotation sleeve rotate sleeve pivoted driving piece.

9. The water hammer resistant gate valve of claim 8, wherein: a valve rod protective shell is arranged above the rotating sleeve, the lower end of the valve rod protective shell is arranged on the rotating sleeve, and the inside of the valve rod protective shell is communicated with the threaded passage.

10. The water hammer resistant gate valve of claim 8, wherein: the driving piece is a hand wheel, and the hand wheel is fixedly sleeved on the rotating sleeve.