Large-flux flat gate valve

Abstract

The invention relates to the technical field of valves, and discloses a large-flux flat gate valve which comprises a valve body, a valve cover is connected to the top of the valve body, a valve rod is slidably mounted at the top of the valve cover, an upper gate plate is connected to the bottom of the valve rod, and two lower gate plates are slidably connected to the bottom of the upper gate plate; the anti-deposition device is used for preventing sediment from being deposited in the valve body; the cleaning device is used for cleaning the surface of the lower flashboard; and the icebreaking device is used for breaking an ice layer attached to the surface of the lower gate plate. Through the cooperation of the two lower gate plates and the two movable valve seats, the two lower gate plates can move towards the two movable valve seats by a certain distance when being closed downwards, so that the two lower gate plates are attached to the two movable valve seats correspondingly, and the two lower gate plates can be fixed at different environment temperatures under the elastic action of the two rubber rings and the two rubber blocks. The two lower gate plates can be attached to the two movable valve seats, and therefore the sealing performance is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a large-flux flat gate valve. Background Art

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part. The working principle of the flat gate valve is mainly based on the linear motion of the gate to achieve the opening and closing control of the fluid. The gate slides perpendicular to the direction of the fluid and cuts into the fluid to close. When the gate slides to completely cover the flow channel, the valve is closed; when the gate completely moves away from the flow channel, the valve is opened.

[0003] Chinese patent CN114593219A discloses "a flat gate valve", including a valve body, a power gate and an auxiliary gate, wherein the power gate and the auxiliary gate are wedge-type gates, which can be provided with a forced sealing force by the actuator when the valve is sealed, thereby ensuring the sealing performance of the valve at low pressure. Furthermore, the wedge-type elastic gate can effectively reduce the friction during the opening and closing of the valve, and effectively increase the service life of the valve. The structure of this patent enables the valve to be repaired online, improving the convenience of valve maintenance, the packing leakage detection mechanism can effectively prevent valve packing leakage, and the opening assistance mechanism effectively reduces the friction between the gate and the sealing surface after the valve is opened, thereby reducing the operating thrust of the valve.

[0004] However, the prior art has the following problems:

[0005] 1. When the existing flat gate valve is used in a large-flow pipeline, the temperature difference in different seasons causes the gate plate and valve seat in the gate valve to have gaps due to thermal expansion and contraction. Since the large-flow flat gate valve has a larger volume, the deformation caused by thermal expansion and contraction is also greater, resulting in a larger gap, which affects the sealing of the gate valve.

[0006] 2. When the water flow in a large-volume pipeline carries sediment, when the water flows through the gate valve, part of the sediment sinks into the gate valve body by gravity. Since there is a gap between the gate valve, the two valve seats and the valve body for the gate valve to move up and down, when more sediment is deposited in this gap, when the gate valve is closed, the bottom of the gate valve cannot be completely closed into the gap due to the obstruction of the sediment, causing the gate valve to be not tightly closed. At the same time, the sediment in the gap will also aggravate the wear of the gate valve and shorten the service life of the gate valve. Summary of the invention

[0007] The purpose of the present invention is to provide a large-flux flat gate valve in order to solve the above-mentioned problems and overcome the defects of the prior art, as described in detail below.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The large-flux flat gate valve provided by the present invention comprises a valve body, the top of the valve body is connected with a valve cover, the top of the valve cover is slidably mounted with a valve stem, the bottom of the valve stem is located in the valve body, the bottom of the valve stem is connected with an upper gate plate, the bottom of the upper gate plate is slidably connected with two lower gate plates, the two lower gate plates are arranged in a mirror image, two mounting seats are installed on the inner wall of the valve body, the mounting seats are connected with rubber blocks, the two rubber blocks are respectively located on the left and right sides of the lower gate plate, the left and right sides of the lower gate plate are respectively connected with inclined plane blocks, the two inclined plane blocks on both sides of the same lower gate plate are respectively in contact with the two rubber blocks when moving, and the front and rear sides of the valve body are respectively provided with A water through hole, a fixed ring is installed in the water through hole of the valve body, and a movable valve seat is slidably connected to the inner side of the fixed ring. A rubber ring is sleeved between the movable valve seat and the fixed ring, and the two lower gates are respectively in contact with the two movable valve seats when moving; it also includes an anti-deposition device for preventing sediment from depositing inside the valve body, and the anti-deposition device is arranged in the valve body; a cleaning device for cleaning the surface of the lower gate, two of the cleaning devices are arranged, and the two cleaning devices are respectively arranged on the inner walls of the front and rear sides of the valve body; an ice-breaking device for breaking the ice layer attached to the surface of the lower gate, and two of the ice-breaking devices are arranged, and the two ice-breaking devices are respectively arranged on the two lower gates.

[0010] Preferably, the anti-deposition device includes two connecting frames, both of which are installed on the upper gate plate, and the connecting frames are connected to pull rods, and the bottom of the pull rods is provided with an end, and the two pull rods are respectively located on the left and right sides of the upper gate plate, and a movable cover is slidably installed inside the valve body.

[0011] Preferably, the middle part of the movable cover is arranged in an arc shape, sliding holes are arranged at both ends of the movable cover respectively, the two pull rods are slidingly connected with the two sliding holes of the movable cover respectively, the end of the bottom of the pull rod contacts with the bottom of the movable cover during the movement, the movable cover is located below the two lower gate plates, and the top surface of the movable cover coincides with the two movable valve seats during the movement.

[0012] Preferably, a plurality of slide grooves are provided on the top surface of the movable cover, an inner slide plate is slidably installed inside the movable cover, a plurality of protrusions are connected to the inner slide plate, and the plurality of protrusions are respectively slidably connected to the plurality of slide grooves on the top surface of the movable cover, a rotating shaft is rotatably installed inside the movable cover, a water wheel is rotatably connected to the top end of the rotating shaft, an arc block is connected to the outer wall of the rotating shaft, a long groove is provided at the center of the inner slide plate, the rotating shaft is located in the long groove of the inner slide plate, and the rotating shaft slides in contact with the edge of the long groove of the inner slide plate when rotating.

[0013] Preferably, the cleaning device comprises a mounting box, the mounting box is mounted on the inner wall of the valve body, a scraper is mounted in the mounting box, and two scrapers of the two cleaning devices are in contact with the surface of the lower gate plate respectively.

[0014] Preferably, the cleaning device also includes a collection box, and the two collection boxes are respectively mounted on the front and rear outer walls of the valve body, and two rebound sliders are slidably mounted on the outer wall edge of the installation box close to the lower gate plate, and a return spring is arranged between the rebound slider and the installation box, and the two rebound sliders on the same installation box are set as a group, and lower pressure frames are respectively installed on the front and rear sides of the upper gate plate, and the two lower pressure frames respectively contact with the two groups of rebound sliders on the two installation boxes during movement, and a connecting rod is hinged at the bottom of the rebound slider, and a push frame and a slide seat are slidably installed in the installation box, and the slide seat is a U-shaped setting, a rotating plate is rotatably connected to the slide seat, and a limiting rod is installed on the slide seat.

[0015] Preferably, one end of the two connecting rods away from the rebound slider is hinged to the push frame, the rotating plate is in sliding contact with the top of the push frame, the push frame is in contact with the slide seat during movement, and the rotating plate abuts against the limit rod during movement, and a plurality of return springs are arranged between the slide seat and the inner wall of the installation box, and a drain hole is opened on the inner wall of the installation box on the side away from the lower gate plate, and the drain hole passes through the connecting valve body and the collecting box, and a check valve is arranged inside the drain hole.

[0016] Preferably, the ice breaking device includes an inner sliding rod, a mounting groove is provided on the lower gate plate, the inner sliding rod is slidably installed in the mounting groove, a mounting shaft is installed in the mounting groove, two ice crushing plates are rotatably installed on the outer wall of the mounting shaft, the two ice crushing plates are mirror-imaged, a curved block is connected to the side of the ice crushing plate facing the mounting groove, an inclined top block is slidably installed in the mounting groove, the inclined top block is connected to the inner sliding rod, a return spring is connected between the inclined top block and the mounting groove, the inclined top block slides in contact with the two curved blocks when moving, and a spring is connected between the ice crushing plate and the mounting groove.

[0017] Preferably, two interference rods are installed on the inner wall of the valve body, and the end of the inner sliding rod away from the installation groove is set as an arc-shaped end. The arc-shaped ends of the two inner sliding rods of the two ice-breaking devices are in sliding contact with the two interference rods respectively during movement.

[0018] The beneficial effects are:

[0019] 1. This large-flow flat gate valve, through the cooperation of two lower gates and two movable valve seats, the two lower gates can move a distance toward the two movable valve seats respectively when closing downward, so that the two lower gates fit with the two movable valve seats respectively, and the elastic effect of two rubber rings and two rubber blocks is utilized, so that under different ambient temperatures, the two lower gates can keep fitting with the two movable valve seats, thereby ensuring sealing.

[0020] 2. The large-flow flat gate valve is provided with an anti-deposition device so that after the two lower gate plates are opened, the movable cover can move upward to between the two movable valve seats to prevent the sediment in the water from sinking to the bottom of the valve body, maintain the smoothness of the movement trajectory of the two lower gate plates, and avoid the accumulation of sediment in the valve body and blocking the normal closing of the two lower gate plates; through the setting of the inner slide plate and multiple protrusions, the multiple protrusions can continuously lift up the sediment deposited on the top surface of the movable cover through up and down reciprocating movement, so that the sediment at this position surges and follows the flow of water, avoiding the attachment of too much sediment to the top surface of the movable cover and affecting the use effect.

[0021] 3. The large-flow flat gate valve is provided with two cleaning devices, so that when the two lower gates are opened, the two scrapers will scrape off the attachments on the surfaces of the two lower gates respectively, so as to avoid the accumulation of attachments on the surfaces of the lower gates after long-term use and the agglomeration of attachments, which will affect the fit between the movable valve seat and the sealing performance; through the cooperation of the sliding seat and the rotating plate, the rotating plate can catch the attachments scraped off the lower gate, and when the lower gate is closed downward, the rotating plate can flip over and discharge the attachments into the collection box through the sewage discharge hole through the cooperation with the sliding seat, so as to facilitate the cleaning of the staff and avoid the accumulation of attachments in the valve body.

[0022] 4. The large-flow flat gate valve is provided with two ice-breaking devices, so that when the two lower gate plates are opened upward, the two ice-breaking plates on the lower gate plates will flip outward to break the ice layer, so that the ice layer on the lower gate plates will fall off, avoiding the lower gate plates from generating a large friction force due to the ice layer attached to themselves when moving upward, increasing the operating pressure of the valve stem and the driving parts, and causing the risk of valve stem breakage and driving parts damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0025] Figure 2It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the valve body structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the lower gate structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the ramp block of the present invention;

[0029] Figure 6 It is a schematic diagram of the movable valve seat structure of the present invention;

[0030] Figure 7 It is a schematic structural diagram of the anti-deposition device of the present invention;

[0031] Figure 8 It is a schematic diagram of the structure of the arc surface block of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the cleaning device of the present invention;

[0033] Fig.10 It is a schematic diagram of the structure of the installation box of the present invention;

[0034] Fig.11 It is a schematic diagram of the scraper structure of the present invention;

[0035] Fig.12 It is a schematic diagram of the rotating plate structure of the present invention;

[0036] Fig.13 It is a schematic diagram of the structure of the ice breaking device of the present invention;

[0037] Fig.14 It is a schematic diagram of the ice crushing plate structure of the present invention.

[0038] The reference numerals are as follows: 1. valve body; 2. valve cover; 3. anti-deposition device; 31. connecting frame; 32. pull rod; 33. movable cover; 34. inner slide plate; 35. convex block; 36. rotating shaft; 37. water wheel; 38. arc block; 4. cleaning device; 41. installation box; 42. scraper; 43. lower pressure frame; 44. rebound slider; 45. connecting rod; 46. push frame; 47. slide seat; 48. rotating plate; 49. Limit rod; 410, drain hole; 411, collection box; 5, ice breaking device; 51, resistance rod; 52, mounting groove; 53, inner slide rod; 54, mounting shaft; 55, ice breaking plate; 56, curved block; 57, inclined top block; 58, spring piece; 6, valve stem; 7, upper gate; 8, lower gate; 9, mounting seat; 10, rubber block; 11, inclined block; 12, fixing ring; 13, movable valve seat; 14, rubber ring. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. 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 implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0040] Example 1

[0041] See also Figure 1 - Figure 6, a large-flow flat gate valve comprises a valve body 1, a valve cover 2 is connected to the top of the valve body 1, a valve stem 6 is slidably installed on the top of the valve cover 2, the bottom of the valve stem 6 is located in the valve body 1, an upper gate plate 7 is connected to the bottom of the valve stem 6, two lower gate plates 8 are slidably connected to the bottom of the upper gate plate 7, and the two lower gate plates 8 are mirror-imaged. A connecting flange is arranged on the top of the valve cover 2, and the connecting flange can be connected and installed with a driving member according to actual needs. After the driving member is connected to the top of the valve stem 6, the valve stem 6 is driven to move up and down through the driving member. When the valve stem 6 moves upward, the upper gate plate 7 is driven to move up and down, and the upper gate plate 7 drives the two lower gate plates 8 to move up and down. After the two lower gate plates 8 move upward into position, the flow channel is opened, and the two lower gate plates 8 move downward After the flow channel is closed, two mounting seats 9 are installed on the inner wall of the valve body 1, and rubber blocks 10 are connected to the mounting seats 9. The two rubber blocks 10 are respectively located on the left and right sides of the lower gate plate 8. The left and right sides of the lower gate plate 8 are respectively connected with inclined blocks 11. The two inclined blocks 11 on both sides of the same lower gate plate 8 are respectively in contact with the two rubber blocks 10 during movement. Taking the same side of the two lower gate plates 8 as an example, when the two inclined blocks 11 move downward and contact the rubber blocks 10, the rubber blocks 10 squeeze the two inclined blocks 11 to both sides, so that the two inclined blocks 11 respectively drive the two lower gate plates 8 to move away from each other. Water holes are respectively provided on the front and back sides of the valve body 1, and a fixing ring 1 is installed in the water hole of the valve body 1. 2. The inner side of the fixed ring 12 is slidably connected with a movable valve seat 13, and a rubber ring 14 is sleeved between the movable valve seat 13 and the fixed ring 12. The two lower gates 8 are in contact with the two movable valve seats 13 respectively when moving. The four inclined blocks 11 cooperate with the two rubber blocks 10 to drive the two lower gates 8 to move a distance away from each other. The surfaces of the two lower gates 8 are respectively in contact with the two movable valve seats 13. Since the rubber ring 14 always presses against the movable valve seat 13, the movable valve seat 13 can have a certain amount of expansion and contraction on the fixed ring 12. When the lower gate 8 presses against the movable valve seat 13, the movable valve seat 13 can shrink a certain distance into the fixed ring 12 by the elasticity of the rubber ring 14, so that the movable valve seat 13 maintains the squeezing force on the surface of the lower gate plate 8. Under different temperature environments, since the rubber ring 14 and the rubber block 10 have a certain elastic deformation, the two lower gate plates 8 and the two movable valve seats 13 can always maintain a fitting state, thereby ensuring the sealing performance; through the cooperation of the two lower gate plates 8 and the two movable valve seats 13, the two lower gate plates 8 can respectively move a distance toward the two movable valve seats 13 when closing downward, so that the two lower gate plates 8 are respectively fitted with the two movable valve seats 13. By utilizing the elastic effect of the two rubber rings 14 and the two rubber blocks 10, the two lower gate plates 8 can maintain a fitting state with the two movable valve seats 13 under different ambient temperatures, thereby ensuring the sealing performance.

[0042] For further information, see Figure 4 , Figure 7 - Figure 8, also includes an anti-deposition device 3, which is used to prevent sediment from depositing inside the valve body 1. The anti-deposition device 3 is arranged in the valve body 1. The anti-deposition device 3 includes two connecting frames 31, and the two connecting frames 31 are both installed on the upper gate plate 7. A pull rod 32 is connected to the connecting frame 31, and an end is arranged at the bottom of the pull rod 32. The two pull rods 32 are respectively located on the left and right sides of the upper gate plate 7. A movable cover 33 is slidably installed inside the valve body 1. The middle part of the movable cover 33 is arranged in an arc shape, and sliding holes are respectively arranged at both ends of the movable cover 33. The two pull rods 32 are respectively slidably connected with the two sliding holes of the movable cover 33. The end at the bottom of the pull rod 32 contacts with the bottom of the movable cover 33 during the movement. When the upper gate plate 7 moves upward, it passes through the two connecting frames 31 The two pull rods 32 are driven to move upward respectively, so that the two pull rods 32 slide upward in the two sliding holes of the movable cover 33, and the two end heads move upward until they contact the bottom of the movable cover 33. When the two pull rods 32 continue to move upward, the two end heads lift the movable cover 33 upward, and the movable cover 33 is located below the two lower gate plates 8. The top surface of the movable cover 33 coincides with the two movable valve seats 13 during the movement. After the upper gate plate 7 moves upward into place, the movable cover 33 moves to a position that fits the water through hole of the valve body 1. At this time, the movable cover 33 can form a complete flow channel with the two water through holes of the valve body 1 and the two movable valve seats 13. The mud and sand carried in the water flow cannot sink to the bottom of the valve body 1 after being blocked by the movable cover 33, which greatly The accumulation of silt in the movable interval of the two lower gate plates 8 is reduced; a plurality of slide grooves are provided on the top surface of the movable cover 33, an inner slide plate 34 is slidably installed inside the movable cover 33, a plurality of protrusions 35 are connected to the inner slide plate 34, and the plurality of protrusions 35 are respectively slidably connected to the plurality of slide grooves on the top surface of the movable cover 33, a rotating shaft 36 is rotatably installed inside the movable cover 33, a water wheel 37 is rotatably connected to the top of the rotating shaft 36, an arc surface block 38 is connected to the outer wall of the rotating shaft 36, the water flow drives the water wheel 37 to rotate, and the water wheel 37 drives the arc surface block 38 to rotate through the rotating shaft 36, a long groove is provided in the center of the inner slide plate 34, the rotating shaft 36 is located in the long groove of the inner slide plate 34, and when the rotating shaft 36 rotates, it slides and contacts with the edge of the long groove of the inner slide plate 34, and the arc surface block 38 When rotating, the inner slide plate 34 can be driven to move up and down reciprocatingly through the long groove, and the multiple protrusions 35 on the inner slide plate 34 move up and down reciprocatingly with the inner slide plate 34. The multiple protrusions 35 can continuously lift the mud and sand on the surface of the movable cover 33 through the up and down reciprocating movement, so that the mud and sand on the surface of the movable cover 33 surge and flow with the water flow, thereby preventing some mud and sand from being deposited on the top surface of the movable cover 33 when the water flow rate is slow; through the setting of the anti-deposition device 3, after the two lower gate plates 8 are opened, the movable cover 33 can move upward to between the two movable valve seats 13, blocking the mud and sand in the water from sinking to the bottom of the valve body 1, maintaining the smoothness of the movement trajectory of the two lower gate plates 8, and preventing the accumulation of mud and sand in the valve body 1 and blocking the normal closing of the two lower gate plates 8;Through the arrangement of the inner slide plate 34 and the plurality of protrusions 35, the plurality of protrusions 35 can continuously lift up the sediment deposited on the top surface of the movable cover 33 by reciprocating up and down, so that the sediment at this position surges and flows with the water flow, thereby preventing the top surface of the movable cover 33 from being attached with a lot of sediment and affecting the use effect. ;

[0043] Further, see Fig. 9 - Fig.12, a cleaning device 4 is used to clean the surface of the lower gate plate 8. Two cleaning devices 4 are provided. The two cleaning devices 4 are respectively arranged on the inner walls of the front and rear sides of the valve body 1. The cleaning device 4 includes a mounting box 41. The mounting box 41 is mounted on the inner wall of the valve body 1. A scraper 42 is installed in the mounting box 41. The two scrapers 42 of the two cleaning devices 4 are in contact with the surface of the lower gate plate 8 respectively. When the two lower gate plates 8 move upward, the two scrapers 42 in the two mounting boxes 41 can scrape off the attachments on the surface of the lower gate plate 8, thereby maintaining the smoothness of the surface of the lower gate plate 8, and avoiding the accumulation of more attachments on the surface of the lower gate plate 8 after long-term use, which affects the fit between the lower gate plate 8 and the movable valve seat 13;The cleaning device 4 further includes collection boxes 411, and the two collection boxes 411 are respectively installed on the front and rear outer walls of the valve body 1. Two resilient sliders 44 are slidably installed on the outer wall edge of the mounting box 41 close to the lower gate 8. A return spring is arranged between the resilient slider 44 and the mounting box 41. The two resilient sliders 44 on the same mounting box 41 are set as a group. Pressing frames 43 are respectively installed on the front and rear sides of the upper gate 7. During the movement process, the two pressing frames 43 respectively contact the two groups of resilient sliders 44 on the two mounting boxes 41. A connecting rod 45 is hinged to the bottom of the resilient slider 44. A pushing frame 46 and a sliding seat 47 are slidably installed in the mounting box 41. The sliding seat 47 is arranged in a U shape. A rotating plate 48 is rotatably connected to the sliding seat 47. The attachments scraped off by the scraping strip 42 fall on the rotating plate 48. A limiting rod 49 is installed on the sliding seat 47. One ends of the two connecting rods 45 far away from the resilient sliders 44 are respectively hinged to the pushing frame 46. When the two resilient sliders 44 move downward, the pushing frame 46 is driven to move away from the lower gate 8 through the two connecting rods 45. The rotating plate 48 is in sliding contact with the top of the pushing frame 46. The pushing frame 46 contacts the sliding seat 47 during the movement process. The rotating plate 48 abuts against the limiting rod 49 during the movement process. During the process of the pushing frame 46 moving away from the lower gate 8, the pushing frame 46 first pushes the rotating plate 48 through its top, causing the rotating plate 48 to flip. During the flipping process of the rotating plate 48, it contacts the limiting rod 49, and the limiting rod 49 abuts against the rotating plate 48 to stop the flipping of the rotating plate 48. At this time, the rotating plate 48 and the U-shaped sliding seat 47 form a plane. A plurality of return springs are arranged between the sliding seat 47 and the inner wall of the mounting box 41. A sewage discharge hole 410 is opened on the inner wall of the mounting box 41 away from the lower gate 8. The sewage discharge hole 410 penetrates and communicates with the valve body 1 and the collection box 411. The plane formed by the rotating plate 48 and the sliding seat 47 squeezes the attachments towards the direction close to the sewage discharge hole 410 when moving away from the lower gate 8. A check valve is arranged inside the sewage discharge hole 410. After being squeezed by the rotating plate 48 and the sliding seat 47, the attachments flow into the collection box 411 through the sewage discharge hole 410. The check valve in the sewage discharge hole 410 can prevent the attachments from flowing back. The staff can clean the collection box 411 regularly. Through the arrangement of the two cleaning devices 4, when the two lower gates 8 are opened, the two scraping strips 42 respectively scrape off the attachments on the surfaces of the two lower gates 8, avoiding that after the lower gates 8 are used for a long time, there are more attachments accumulated on the surface and caking occurs, which affects the fitting degree with the movable valve seat 13, thereby affecting the sealing performance; through the cooperation of the sliding seat 47 and the rotating plate 48, the rotating plate 48 can catch the attachments scraped off from the lower gate 8. When the lower gate 8 closes downward, the rotating plate 48 can flip, and through the cooperation with the sliding seat 47, the attachments are discharged into the collection box 411 through the sewage discharge hole 410, which is convenient for the staff to clean and avoids the accumulation of attachments in the valve body 1.;

[0044] Furthermore, please refer to Fig.13 - Fig.14The ice-breaking device 5 is used to break the ice layer attached to the surface of the lower gate plate 8. Two ice-breaking devices 5 are provided. The two ice-breaking devices 5 are respectively arranged on the two lower gate plates 8. The ice-breaking device 5 includes an inner slide bar 53. The lower gate plate 8 is provided with a mounting groove 52. The inner slide bar 53 is slidably installed in the mounting groove 52. Two abutment rods 51 are installed on the inner wall of the valve body 1. One end of the inner slide bar 53 away from the mounting groove 52 is set as an arc end. The arc ends of the two inner slide bars 53 of the two ice-breaking devices 5 are respectively in sliding contact with the two abutment rods 51 during the movement. When the lower gate plate 8 is opened upward, the arc of the inner slide bar 53 The inner end of the inner slide bar 53 contacts the abutment rod 51, and the inner slide bar 53 is subjected to the reverse thrust of the abutment rod 51, so that the inner slide bar 53 slides into the mounting groove 52. A mounting shaft 54 ​​is installed in the mounting groove 52. Two ice crushing plates 55 are rotatably installed on the outer wall of the mounting shaft 54. The two ice crushing plates 55 are mirror-imaged. When the two ice crushing plates 55 are not turned over, they form a plane with the surface of the lower gate plate 8. A curved surface block 56 is connected to the side of the ice crushing plate 55 facing the mounting groove 52. An inclined top block 57 is slidably installed in the mounting groove 52. The inclined top block 57 is connected to the inner slide bar 53, and a return spring is connected between the inclined top block 57 and the mounting groove 52. The inclined top block 57 slides with the two curved surface blocks 56 during movement, and the inner slide rod 53 drives the inclined top block 57 to slide in the direction close to the two curved surface blocks 56. The inclined surface of the inclined top block 57 applies thrust to the two curved surface blocks 56, so that the two curved surface blocks 56 drive the two ice crushing plates 55 to flip outward with the installation shaft 54 ​​as the axis. When the two ice crushing plates 55 flip outward, they can crush the lower gate plate 8 and the ice layer attached to their own surface, so that the ice layer on the surface of the lower gate plate 8 falls off. A spring piece 58 is connected between the ice crushing plate 55 and the installation groove 52. After the ice layer is broken, the two ice crushing plates 55 are reset by the elastic force of the two spring pieces 58 , the two ice-breaking plates 55 and the surface of the lower gate plate 8 form a plane again, and the two ice-breaking plates 55 are flipped outward only when the lower gate plate 8 is opened upward, and are immediately reset after flipping, so as to avoid affecting the movement trajectory of the lower gate plate 8; through the arrangement of the two ice-breaking devices 5, when the two lower gate plates 8 are opened upward, the two ice-breaking plates 55 on the lower gate plates 8 break the ice layer by flipping outward, so that the ice layer on the lower gate plates 8 falls off, and it is avoided that when the lower gate plates 8 move upward, a large friction force is generated due to the ice layer attached to themselves, which increases the operating pressure of the valve stem 6 and the driving component, and generates the risk of the valve stem 6 breaking and the driving component being damaged.

[0045] With the above structure, the working principle of this case is that a connecting flange is provided on the top of the valve cover 2, and the connecting flange can be connected and installed with a driving member according to actual needs. After the driving member is connected to the top of the valve stem 6, the valve stem 6 is driven to move upward or downward by the driving member. When the valve stem 6 moves upward, the upper gate plate 7 is driven to move upward, and the upper gate plate 7 drives the two lower gate plates 8 to move upward. When the driving member drives the valve stem 6 to move downward, the upper gate plate 7 and the two lower gate plates 8 move downward. After the two lower gate plates 8 move upward into place, the flow channel is opened, and after the two lower gate plates 8 move downward into place, the flow channel is closed. When the two lower gates 8 are about to move downward and are about to be in place, the two rubber blocks 10 on the two mounting seats 9 contact the four inclined blocks 11 on the two lower gates 8 respectively. Taking the same side of the two lower gates 8 as an example, when the two inclined blocks 11 move downward and contact the rubber blocks 10, the rubber blocks 10 squeeze the two inclined blocks 11 to both sides, so that the two inclined blocks 11 respectively drive the two lower gates 8 to move away from each other. The same is true for the two inclined blocks 11 on the other side. The four inclined blocks 11 drive the two lower gates 8 by cooperating with the two rubber blocks 10. Move a distance in the direction away from each other, and the surfaces of the two lower gates 8 are respectively in contact with the two movable valve seats 13. Since the rubber ring 14 always presses against the movable valve seat 13, the movable valve seat 13 can have a certain amount of expansion and contraction on the fixed ring 12. When the lower gate 8 presses against the movable valve seat 13, the movable valve seat 13 can shrink a certain distance into the fixed ring 12 by the elasticity of the rubber ring 14, so that the movable valve seat 13 maintains the extrusion force on the surface of the lower gate 8. Under different temperature environments, since the rubber ring 14 and the rubber block 10 have a certain elastic deformation The two lower gate plates 8 and the two movable valve seats 13 are matched with each other so that the two lower gate plates 8 and the two movable valve seats 13 can always maintain a close fit, thereby ensuring the sealing performance; through the cooperation of the two lower gate plates 8 and the two movable valve seats 13, the two lower gate plates 8 can respectively move a distance toward the two movable valve seats 13 when closing downward, so that the two lower gate plates 8 are respectively fitted with the two movable valve seats 13, and the elastic effect of the two rubber rings 14 and the two rubber blocks 10 is utilized so that the two lower gate plates 8 can maintain a close fit with the two movable valve seats 13 at different ambient temperatures, thereby ensuring the sealing performance.

[0046] When the two lower gates 8 are closed, the ends of the two tie rods 32 are at a distance from the bottom of the movable cover 33. When the upper gate 7 moves upward, the two connecting frames 31 respectively drive the two tie rods 32 to move upward, so that the two tie rods 32 slide upward in the two sliding holes of the movable cover 33, and the two ends move upward until they contact the bottom of the movable cover 33. When the two tie rods 32 continue to move upward, the two ends lift the movable cover 33 upward to move the movable cover 33 upward. When the upper gate 7 moves upward into place, the movable cover 33 moves to a position that fits the water through hole of the valve body 1. At this time, the movable cover 33 can form a complete flow channel with the two water through holes of the valve body 1 and the two movable valve seats 13, and the mud and sand carried in the water flow passes through the movable valve seat 13. The movable cover 33 is blocked and cannot sink to the bottom of the valve body 1, which greatly reduces the accumulation of mud and sand in the movable interval of the two lower gate plates 8, and avoids the obstruction of the two lower gate plates 8 by mud and sand when closing downward. When the two lower gate plates 8 are closed downward, they contact the top surface of the movable cover 33 and push the movable cover 33 downward to reset the movable cover 33; when the movable cover 33 is located in the flow channel, the water flow drives the water wheel 37 to rotate, and the water wheel 37 drives the rotating shaft 36 to rotate. When the rotating shaft 36 rotates, it drives the arc surface block 38 to rotate. During the rotation of the arc surface block 38, when the arc surface block 38 contacts the edge of the long groove of the inner slide plate 34, the arc surface of the arc surface block 38 slides along the edge of the long groove and applies an upward thrust to the inner slide plate 34 through the long groove, so that the inner slide plate 34 moves upward. When the surface block 38 is not in contact with the edge of the long groove and is located in the long groove as a whole, the inner slide plate 34 is reset by its own gravity, so that when the arc surface block 38 rotates, it can drive the inner slide plate 34 to move back and forth up and down, and the multiple protrusions 35 on the inner slide plate 34 follow the inner slide plate 34 to move back and forth up and down. When the protrusion 35 moves to the lowest point, the protrusion 35 and the top surface of the movable cover 33 form a plane. When the protrusion 35 moves upward, the top surface of the protrusion 35 protrudes from the top surface of the movable cover 33. The multiple protrusions 35 can continuously lift up the mud and sand on the surface of the movable cover 33 through the up and down reciprocating movement, and form a fine water flow, so that the mud and sand on the surface of the movable cover 33 surges and flows with the water flow, avoiding that part of the mud and sand is deposited on the top of the movable cover 33 when the water flow rate is slow. After the movable cover 33 is reset downward, the silt follows the movable cover 33 to move into the valve body 1, thereby affecting the two lower gate plates 8; through the setting of the anti-sedimentation device 3, after the two lower gate plates 8 are opened, the movable cover 33 can move upward to between the two movable valve seats 13, blocking the silt in the water from sinking to the bottom of the valve body 1, maintaining the smoothness of the movement trajectory of the two lower gate plates 8, and avoiding the accumulation of silt in the valve body 1 and blocking the normal closing of the two lower gate plates 8; through the setting of the inner slide plate 34 and the plurality of protrusions 35, the plurality of protrusions 35 continuously lift up the silt deposited on the top surface of the movable cover 33 through up and down reciprocating movement, so that the silt at this position surges and follows the water flow, avoiding the attachment of a lot of silt to the top surface of the movable cover 33 and affecting the use effect.

[0047] When the two lower gate plates 8 move upward, the two scraper strips 42 in the two installation boxes 41 can scrape off the attachments on the surface of the lower gate plates 8, thereby maintaining the smoothness of the surface of the lower gate plates 8 and avoiding the accumulation of a large number of attachments on the surface of the lower gate plates 8 after long-term use, which affects the fit between the lower gate plates 8 and the movable valve seat 13; taking one of the cleaning devices 4 as an example, when the lower gate plates 8 move upward, the attachments scraped off by the scraper strips 42 fall on the rotating plate 48, and when the upper gate plates 7 and the lower gate plates 8 move downward, the upper gate plate 7 drives the lower pressure frame 43 to move downward. When the upper gate plate 7 is about to move downward into place, the lower pressure frame 43 contacts the two rebound sliders 44 of the same group and pushes them downward, and the two rebound sliders 44 move downward When the push frame 46 is in motion, the two connecting rods 45 drive the push frame 46 to move in the direction away from the lower gate plate 8. In the process of moving in the direction away from the lower gate plate 8, the push frame 46 first pushes the rotating plate 48 through its top to turn the rotating plate 48 over. During the turning process of the rotating plate 48, it contacts the limit rod 49, and the limit rod 49 abuts against the rotating plate 48 to stop the turning of the rotating plate 48. At this time, the rotating plate 48 and the sliding seat 47 set as a U-shaped form a plane. At this time, the push frame 46 contacts the sliding seat 47, and the push frame 46 continues to move in the direction away from the lower gate plate 8. The push frame 46 pushes the sliding seat 47 and the rotating plate 48 in the direction away from the lower gate plate 8. When the rotating plate 48 turns over, the attachments on its surface are turned over between the rotating plate 48 and the inner wall of the mounting box 41. The rotating plate 48 and the sliding seat 47 are When the plane formed by the upper gate plate 7 moves in the direction away from the lower gate plate 8, it squeezes the attachments in the direction close to the drainage hole 410. Since the attachments usually have a high water content, the scraped attachments are usually in a state similar to fluid. After being squeezed by the rotating plate 48 and the slide seat 47, the attachments flow into the collection box 411 through the drainage hole 410. The check valve in the drainage hole 410 can prevent the attachments from flowing back. The staff can clean the collection box 411 regularly. After the upper gate plate 7 moves upward, the lower pressure frame 43 moves upward and breaks away from the contact with the two rebound sliders 44. The rebound slider 44 is reset by the elastic force of the reset spring and drives the push frame 46 to reset through the connecting rod 45. The slide seat 47 is also reset by the elastic force of the reset spring. After the slide 47 is reset, the rotating plate 48 is reset by gravity rotation; through the setting of the two cleaning devices 4, when the two lower gates 8 are opened, the two scrapers 42 respectively scrape off the attachments on the surfaces of the two lower gates 8, so as to avoid the lower gates 8 from accumulating a lot of attachments on the surface and agglomerating after long-term use, which affects the fit between the movable valve seat 13 and the sealing performance; through the cooperation of the slide 47 and the rotating plate 48, the rotating plate 48 can catch the attachments scraped off the lower gate 8. When the lower gate 8 is closed downward, the rotating plate 48 can be turned over, and through the cooperation with the slide 47, the attachments are discharged into the collection box 411 through the drain hole 410, which is convenient for the staff to clean and avoid the attachments from accumulating in the valve body 1.

[0048] When the ice breaker 55 is in the closed position, the ice breaker 51 will move forward and the ice breaker 51 will move backward. The ice layer on the surface of the lower gate plate 8 is broken, and the ice layer on the surface of the lower gate plate 8 falls off. After that, the resistance rod 51 is out of contact with the inner sliding rod 53, and the inclined top block 57 drives the inner sliding rod 53 to reset through the elastic force of the reset spring, and the two ice-breaking plates 55 are reset by the elastic force of the two spring pieces 58. The two ice-breaking plates 55 and the surface of the lower gate plate 8 form a plane again. The two ice-breaking plates 55 are only flipped outward when the lower gate plate 8 is opened upward, and are reset immediately after flipping, so as to avoid affecting the movement trajectory of the lower gate plate 8; through the arrangement of the two ice-breaking devices 5, when the two lower gate plates 8 are opened upward, the two ice-breaking plates 55 on the lower gate plate 8 will break the ice layer by flipping outward, so that the ice layer on the lower gate plate 8 falls off, avoiding the lower gate plate 8 from generating a large friction force due to the ice layer attached to itself when moving upward, increasing the operating pressure of the valve stem 6 and the driving member, and generating the risk of the valve stem 6 breaking and the driving member being damaged.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A large-flux flat gate valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is connected to a valve cover (2), a valve stem (6) is slidably mounted on the top of the valve cover (2), the bottom of the valve stem (6) is located in the valve body (1), the bottom of the valve stem (6) is connected to an upper gate plate (7), the bottom of the upper gate plate (7) is slidably connected to two lower gate plates (8), the two lower gate plates (8) are arranged in a mirror image, two mounting seats (9) are mounted on the inner wall of the valve body (1), the mounting seats (9) are connected to rubber blocks (10), the two rubber blocks (10) are respectively located on the left and right sides of the lower gate plate (8), the lower gate plate The left and right sides of the lower gate plate (8) are respectively connected with inclined plane blocks (11), and the two inclined plane blocks (11) on both sides of the same lower gate plate (8) are respectively in contact with the two rubber blocks (10) when moving. The front and rear sides of the valve body (1) are respectively provided with water holes, and a fixing ring (12) is installed in the water hole of the valve body (1). The inner side of the fixing ring (12) is slidably connected with a movable valve seat (13), and a rubber ring (14) is sleeved between the movable valve seat (13) and the fixing ring (12). The two lower gate plates (8) are respectively in contact with the two movable valve seats (13) when moving; It also includes an anti-deposition device (3) for preventing sediment from being deposited inside the valve body (1); the anti-deposition device (3) is arranged inside the valve body (1); A cleaning device (4) for cleaning the surface of the lower gate plate (8), wherein two cleaning devices (4) are provided, and the two cleaning devices (4) are respectively provided on the inner walls of the front and rear sides of the valve body (1); The ice-breaking device (5) is used to break the ice layer attached to the surface of the lower gate plate (8). Two ice-breaking devices (5) are provided, and the two ice-breaking devices (5) are respectively provided on the two lower gate plates (8).

2. The large flux flat gate valve according to claim 1, characterized in that: The anti-deposition device (3) comprises two connecting frames (31), both of which are mounted on the upper gate plate (7), a pull rod (32) is connected to the connecting frame (31), an end is provided at the bottom of the pull rod (32), the two pull rods (32) are respectively located on the left and right sides of the upper gate plate (7), and a movable cover (33) is slidably mounted inside the valve body (1).

3. The large flux flat gate valve according to claim 2, characterized in that: The middle part of the movable cover (33) is arranged in an arc shape, and sliding holes are arranged at both ends of the movable cover (33). The two pull rods (32) are respectively slidably connected with the two sliding holes of the movable cover (33), and the end of the bottom of the pull rod (32) contacts the bottom of the movable cover (33) during the movement. The movable cover (33) is located below the two lower gate plates (8), and the top surface of the movable cover (33) coincides with the two movable valve seats (13) during the movement.

4. The large flux flat gate valve according to claim 3 is characterized in that: A plurality of slide grooves are provided on the top surface of the movable cover (33); an inner slide plate (34) is slidably installed inside the movable cover (33); a plurality of protrusions (35) are connected to the inner slide plate (34); the plurality of protrusions (35) are respectively slidably connected to the plurality of slide grooves on the top surface of the movable cover (33); a rotating shaft (36) is rotatably installed inside the movable cover (33); a water wheel (37) is rotatably connected to the top end of the rotating shaft (36); an arc block (38) is connected to the outer wall of the rotating shaft (36); a long groove is provided at the center of the inner slide plate (34); the rotating shaft (36) is located in the long groove of the inner slide plate (34); and when the rotating shaft (36) rotates, it slides in contact with the edge of the long groove of the inner slide plate (34).

5. The large flux flat gate valve according to claim 4, characterized in that: The cleaning device (4) comprises a mounting box (41), the mounting box (41) being mounted on the inner wall of the valve body (1), a scraper (42) being mounted in the mounting box (41), and the two scrapers (42) of the two cleaning devices (4) respectively contact the surface of the lower gate plate (8).

6. The large flux flat gate valve according to claim 5, characterized in that: The cleaning device (4) further comprises a collecting box (411), wherein the two collecting boxes (411) are respectively mounted on the outer walls of the valve body (1) on the front and rear sides, and the mounting box (41) is slidably mounted with two rebound sliders (44) near the outer wall edge of the lower gate plate (8). A return spring is arranged between the rebound slider (44) and the mounting box (41), and the two rebound sliders (44) on the same mounting box (41) are arranged as a group. A lower pressure frame (43) is installed. The two lower pressure frames (43) are in contact with two groups of rebound sliders (44) on the two installation boxes (41) respectively during movement. The bottom of the rebound slider (44) is hinged with a connecting rod (45). A push frame (46) and a slide seat (47) are slidably installed in the installation box (41). The slide seat (47) is a U-shaped setting. A rotating plate (48) is rotatably connected to the slide seat (47). A limit rod (49) is installed on the slide seat (47).

7. The large flux flat gate valve according to claim 6, characterized in that: One end of the two connecting rods (45) away from the rebound slider (44) is hinged to the push frame (46), the rotating plate (48) is in sliding contact with the top of the push frame (46), the push frame (46) is in contact with the slide seat (47) during movement, and the rotating plate (48) is in contact with the limit rod (49) during movement. A plurality of return springs are arranged between the slide seat (47) and the inner wall of the installation box (41). A drain hole (410) is provided on the inner wall of the installation box (41) away from the lower gate plate (8). The drain hole (410) passes through the connecting valve body (1) and the collecting box (411), and a check valve is arranged inside the drain hole (410).

8. The large flux flat gate valve according to claim 7, characterized in that: The ice breaking device (5) comprises an inner slide bar (53), a mounting groove (52) is arranged on the lower gate plate (8), the inner slide bar (53) is slidably mounted in the mounting groove (52), a mounting shaft (54) is mounted in the mounting groove (52), two ice crushing plates (55) are rotatably mounted on the outer wall of the mounting shaft (54), the two ice crushing plates (55) are arranged in a mirror image, a curved surface block (56) is connected to the side of the ice crushing plate (55) facing the mounting groove (52), an inclined surface top block (57) is slidably mounted in the mounting groove (52), the inclined surface top block (57) is connected to the inner slide bar (53), a return spring is connected between the inclined surface top block (57) and the mounting groove (52), the inclined surface top block (57) is in sliding contact with the two curved surface blocks (56) when moving, and a spring piece (58) is connected between the ice crushing plate (55) and the mounting groove (52).

9. The large flux flat gate valve according to claim 8, characterized in that: Two abutment rods (51) are installed on the inner wall of the valve body (1), and one end of the inner slide rod (53) away from the installation groove (52) is arranged as an arc-shaped end. The arc-shaped ends of the two inner slide rods (53) of the two ice-breaking devices (5) respectively slide in contact with the two abutment rods (51) during movement.

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