Double-flat-plate sealing gate valve capable of avoiding blockage

Abstract

The utility model relates to a double-flat-plate sealing gate valve capable of avoiding blockage. The double-flat-plate sealing gate valve comprises a valve cavity, communicating pipes are arranged on the two sides of the valve cavity, a base is arranged at the top end of the valve cavity, a guide plate is arranged in the base, a connecting rod is arranged in the guide plate in a sliding mode, and a double-valve-plate structure is arranged at the bottom end of the connecting rod. The utility model relates to the technical field of flat sealing gate valves. According to the double-flat-plate sealing gate valve capable of avoiding blockage, through the arrangement of the oblique flaring, a gap can be formed between the oblique flaring and the expansion plate in the closing process, when water flow passes through the gap, the water flow can be effectively expanded and sprayed out, the flow speed can be increased, silt in the water flow can be effectively dispersed, and then silt gathering can be effectively prevented; and silt can be effectively prevented from being accumulated at the pipe opening of the communicating pipe, the situation that the silt blocks the advancing track of the valve plate when the valve plate is closed can be effectively avoided, and the anti-blocking effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of flat plate sealing gate valves, in particular to a double flat plate sealing gate valve which can avoid blockage. Background Art

[0002] A flat gate valve is a sliding valve with parallel gates as the closing element. The closing element can be a single gate or a double gate with a spreading mechanism between them. The pressure of the gate against the valve seat is controlled by the medium pressure acting on the floating gate or floating valve seat.

[0003] In the prior art, when a flat gate valve is used in a scenario containing mud or solid impurities, mud tends to remain in the track where the gate moves during the closing process. Therefore, the gate is easily stuck by the mud, making it difficult to close the gate. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a double-plate sealing gate valve that avoids clogging, so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A double-plate sealing gate valve for preventing clogging includes a valve cavity, connecting pipes are provided on both sides of the valve cavity, a base is provided at the top of the valve cavity, a guide plate is provided inside the base, a connecting rod is provided inside the guide plate for sliding, and a double valve plate structure is provided at the bottom end of the connecting rod;

[0007] The double valve plate structure includes a connecting platform, which is fixedly connected to the bottom end of the connecting rod. A rotating shaft is provided on both sides of the connecting platform. A connecting rod is rotatably provided at the end of the rotating shaft. A fixed rod is provided at the end of the connecting rod away from the rotating shaft, and an anti-blocking valve plate is provided on the side wall of the fixed rod.

[0008] Furthermore, a positioning guide rail is slidably provided at the bottom end of the connecting rod, and the positioning guide rail is arranged in an I-shape, and the end wall of the fixing rod is provided with a guide groove that slidably cooperates with the positioning guide rail.

[0009] Furthermore, a drain pipe is provided at the bottom end of the valve cavity, a sand discharge valve is provided at the inner bottom end of the drain pipe, and a positioning platform is provided at the inner bottom end of the valve cavity.

[0010] Furthermore, a connecting flange is provided at the end of the connecting pipe, and an oblique expansion port is provided at a position of the connecting pipe inside the valve cavity.

[0011] Furthermore, the anti-blocking valve plate includes an expansion plate, which is fixedly connected to the fixed rod, and the edge of the expansion plate is provided with an oblique angle that matches the oblique expansion. The side wall of the expansion plate is fixedly provided with an insert plate, and the diameter of the insert plate is equal to the inner tube diameter of the connecting pipe.

[0012] Furthermore, a closing plate is provided at the top of the base, an adjusting screw is rotatably provided inside the closing plate, the adjusting screw is threadably engaged with the connecting rod, and a hand wheel is provided at the top of the adjusting screw.

[0013] In summary, the present invention has at least one of the following beneficial technical effects:

[0014] 1. This anti-clogging double-plate sealing gate valve, through the setting of oblique expansion, can form a gap with the expansion plate during the closing process. When water flows through this gap, the water flow can be effectively expanded and ejected, and the flow rate will be increased, which can effectively disperse the sediment in the water flow, thereby effectively preventing the sediment from gathering and accumulating at the pipe mouth of the connecting pipe. It can effectively avoid the effect of sediment blocking the valve plate's movement trajectory when the valve plate is closed, thereby achieving an anti-clogging effect;

[0015] 2. This double-plate sealing gate valve that avoids clogging is set through a positioning platform. When the anti-blocking valve plate moves downward and contacts the positioning platform, the anti-blocking valve plate and the connecting pipe are coaxial. At this time, when the connecting rod continues to move downward, it will push the fixed rods on both sides through the connecting rod, so that the two anti-blocking valve plates are inserted into the inside of the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. 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 any creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a double-plate sealing gate valve that avoids clogging.

[0018] Figure 2 The figure is a schematic diagram of the internal structure of a double-plate sealing gate valve for avoiding blockage according to the present invention.

[0019] Figure 3 The utility model is a structural schematic diagram of a double valve plate structure of a double flat plate sealing gate valve for avoiding blockage.

[0020] Figure 4 This is a structural schematic diagram of a double-valve plate structure of a double-plate sealing gate valve for preventing blockage according to the present invention when the double valve plates are closed.

[0021] Figure 5 This is a structural schematic diagram of a double-valve plate structure of a double-plate sealing gate valve for avoiding blockage according to the present invention when the double valve plates are opened.

[0022] In the figure, 1. valve chamber; 2. connecting pipe; 3. base; 4. guide plate; 5. connecting rod; 6. double valve plate structure; 61. rotating shaft; 62. connecting rod; 63. fixing rod; 64. anti-blocking valve plate; 641. expansion plate; 642. bevel; 643. insert plate; 65. positioning guide rail; 66. guide groove; 7. drain pipe; 8. sand discharge valve; 9. positioning platform; 10. connecting flange; 11. oblique flaring; 12. closing plate; 13. adjusting screw; 14. handwheel. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] Example:

[0025] Reference Figure 1 - Figure 5 The utility model discloses a double-plate sealing gate valve for avoiding clogging, comprising a valve chamber 1, a connecting pipe 2 being provided on both sides of the valve chamber 1, a base 3 being provided at the top of the valve chamber 1, a guide plate 4 being provided inside the base 3, a connecting rod 5 being provided inside the guide plate 4 for sliding, and a double valve plate structure 6 being provided at the bottom end of the connecting rod 5;

[0026] The double valve plate structure 6 includes a connecting platform, which is fixedly connected to the bottom end of the connecting rod 5. A rotating shaft 61 is provided on both sides of the connecting platform. A connecting rod 62 is rotatably provided at the end of the rotating shaft 61. A fixed rod 63 is provided at the end of the connecting rod 62 away from the rotating shaft 61, and an anti-blocking valve plate 64 is provided on the side wall of the fixed rod 63.

[0027] In this embodiment, when the gate valve is opened, the connecting rod 5 moves upward. During the upward movement of the connecting rod 5, the connecting rod 62 is lifted upward by the connecting platform and the rotating shaft 61, so that the connecting rod 62 moves upward. Since the anti-blocking valve plate 64 is inserted into the interior of the connecting pipe 2 at this time, the fixing rods 63 on both sides are stretched inward during the upward movement of the connecting rod 62. At this time, the anti-blocking valve plates 64 on both sides can be pulled out from the interior of the two connecting pipes 2, so that the two connecting pipes 2 are connected to each other through the valve cavity 1. After the anti-blocking valve plate 64 is pulled out, the anti-blocking valve plate 64 continues to move upward, so that the anti-blocking valve plate 64 moves to the interior of the base 3, so as to prevent the anti-blocking valve plate 64 from blocking the connecting pipe 2.

[0028] When closing the gate valve, the connecting rod 5 moves downward. At this time, the connecting platform and the rotating shaft 61 push the connecting rod 62 to move downward, causing the anti-blocking valve plate 64 to slide downward, and until the connecting rod 62 opens to both sides, causing the anti-blocking valve plate 64 to expand. After the anti-blocking valve plate 64 expands, it is inserted into the interior of the connecting pipe 2 again to achieve the purpose of closing the connecting pipe.

[0029] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a positioning guide rail 65 is slidably provided at the bottom end of the connecting rod 5 , and the positioning guide rail 65 is arranged in an I-shape, and the end wall of the fixing rod 63 is provided with a guide groove 66 that slides with the positioning guide rail 65 .

[0030] In this embodiment, the sliding positioning guide rail 65 is used to guide the sliding direction of the fixing rod 63, so that the fixing rod 63 can only move in the linear direction of the anti-blocking valve plate 64, so as to close the connecting pipe 2.

[0031] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a drain pipe 7 is provided at the bottom end of the valve cavity 1 , a sand discharge valve 8 is provided at the inner bottom end of the drain pipe 7 , and a positioning platform 9 is provided at the inner bottom end of the valve cavity 1 .

[0032] In this embodiment, through the setting of the drain pipe 7, when the gate valve is opened and closed again, the sand discharge valve 8 is opened to allow the water remaining inside the valve cavity 1 to be discharged, thereby avoiding water accumulation inside the valve cavity 1. Through the setting of the positioning platform 9, when the anti-blocking valve plate 64 moves downward and contacts the positioning platform 9, the anti-blocking valve plate 64 is coaxial with the connecting pipe 2. At this time, when the connecting rod 5 continues to move downward, it will push the fixed rods 63 on both sides through the connecting rod 62, so that the two anti-blocking valve plates 64 are inserted into the interior of the connecting pipe 2.

[0033] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a connecting flange 10 is provided at the end of the connecting pipe 2 , and an oblique expansion port 11 is provided at the position of the connecting pipe 2 inside the valve cavity 1 .

[0034] In this embodiment, by setting the oblique expansion mouth 11, the connecting pipe 2 and the anti-blocking valve plate 64 form an oblique through groove when they are about to close but not closed. At this time, the water flow will expand and spray out, and the flow rate will increase, thereby effectively preventing mud and sand from accumulating at the pipe mouth of the connecting pipe 2, and effectively avoiding the effect of mud and sand blocking the movement trajectory of the valve plate when the valve plate is closed.

[0035] In a further preferred embodiment of the present invention, Figure 1-5As shown, the anti-blocking valve plate 64 includes an expansion plate 641, which is fixedly connected to the fixing rod 63. The edge of the expansion plate 641 is provided with an oblique angle 642 that matches the oblique expansion opening 11. The side wall of the expansion plate 641 is fixedly provided with an insert plate 643, and the diameter of the insert plate 643 is equal to the inner tube diameter of the connecting pipe 2.

[0036] In this embodiment, by providing the expansion plate 641 with an oblique angle 642, a smaller gap can be formed with the oblique expansion opening 11 when closed, such as Figure 5 As shown, the red arrow indicates the trajectory of water flow. When the water flows through this gap, it can effectively form a fast-flowing form, which can effectively prevent sediment from accumulating in the connecting pipe 2.

[0037] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a closing plate 12 is provided at the top of the base 3 , an adjusting screw 13 is rotatably provided inside the closing plate 12 , the adjusting screw 13 is threadedly engaged with the connecting rod 5 , and a hand wheel 14 is provided at the top of the adjusting screw 13 .

[0038] In this embodiment, the closing plate 12 and the adjusting screw 13 are provided to control the up and down movement of the connecting rod 5 .

[0039] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A double-plate sealing gate valve to avoid clogging, characterized in that: The valve chamber (1) comprises a valve chamber (1), connecting pipes (2) are provided on both sides of the valve chamber (1), a base (3) is provided at the top end of the valve chamber (1), a guide plate (4) is provided inside the base (3), a connecting rod (5) is provided inside the guide plate (4) for sliding, and a double valve plate structure (6) is provided at the bottom end of the connecting rod (5); The double valve plate structure (6) includes a connecting platform, which is fixedly connected to the bottom end of the connecting rod (5). A rotating shaft (61) is provided on both sides of the connecting platform. A connecting rod (62) is rotatably provided at the end of the rotating shaft (61). A fixing rod (63) is provided at the end of the connecting rod (62) away from the rotating shaft (61). An anti-blocking valve plate (64) is provided on the side wall of the fixing rod (63).

2. A double-plate sealing gate valve for preventing clogging according to claim 1, characterized in that: A positioning guide rail (65) is slidably provided at the bottom end of the connecting rod (5), and the positioning guide rail (65) is arranged in an I-shape. The end wall of the fixing rod (63) is provided with a guide groove (66) that is slidably matched with the positioning guide rail (65).

3. A double-plate sealing gate valve for preventing clogging according to claim 2, characterized in that: The bottom end of the valve cavity (1) is provided with an exhaust pipe (7), the inner bottom end of the exhaust pipe (7) is provided with a sand discharge valve (8), and the inner bottom end of the valve cavity (1) is provided with a positioning platform (9).

4. A double-plate sealing gate valve for preventing clogging according to claim 3, characterized in that: The end of the connecting pipe (2) is provided with a connecting flange (10), and the position of the connecting pipe (2) inside the valve cavity (1) is provided with an oblique expansion opening (11).

5. A double-plate sealing gate valve for preventing clogging according to claim 4, characterized in that: The anti-blocking valve plate (64) includes an expansion plate (641), which is fixedly connected to the fixing rod (63). The edge of the expansion plate (641) is provided with an oblique angle (642) that matches the oblique expansion opening (11). The side wall of the expansion plate (641) is fixedly provided with an insert plate (643), and the diameter of the insert plate (643) is equal to the inner tube diameter of the connecting tube (2).

6. A double-plate sealing gate valve for preventing clogging according to claim 5, characterized in that: The top of the base (3) is provided with a closing plate (12), the interior of the closing plate (12) is rotatably provided with an adjusting screw (13), the adjusting screw (13) is threadedly matched with the connecting rod (5), and the top of the adjusting screw (13) is provided with a hand wheel (14).

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