Opening type parallel double-gate-disc gate valve with flow guide holes

Abstract

The utility model discloses an opening type parallel double-gate-plate gate valve with a flow guide hole, which comprises a valve body, a hand wheel is arranged at the upper end of the valve body, a valve rod is arranged on the hand wheel, the lower end of the valve rod penetrates through the valve body and is inwards provided with a connecting plate, and a first connecting rod and a second connecting rod are arranged at two ends of the connecting plate. The first connecting rod is rotationally connected with the second connecting rod, the two connecting rods can be driven to perform cross relative movement by arranging the valve rods, the connecting plates and the rollers, so that the limiting blocks at the outer ends of the two valve plates correspond to the limiting grooves, and therefore the valve plates have the blocking effect on the flow channel; the parallel double-gate-disc gate valve is simple in structure, can realize double positioning under the action of the bottom fixing seat, the driving motor, the screw rod and the positioning rod, improves the strength of the whole valve body, has no friction between the gate disc and the valve seat in the opening and closing process, greatly reduces the abrasion of a sealing piece, and prolongs the service life of the valve.

Description

Technical Field

[0001] The utility model relates to the field of parallel double-disc gate valves, in particular to a parallel double-disc gate valve with a diversion hole and a propped-open type. Background Art

[0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that allows the medium (liquid, gas, powder) in piping and equipment to flow or stop and control its flow. There are many types of valves, such as gate valves, throttle valves, ball valves, butterfly valves, diaphragm valves, plunger valves, plug valves, etc. A gate valve is a gate valve, and the movement direction of the gate valve is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed. The gate valve has a small flow resistance, is not prone to water hammer, has a simple structure, is symmetrical on both sides, and has a wide range of applications. However, the seals of the gate valve are severely worn during the opening and closing process. Most gate valves cannot be used anymore due to damage and leakage of the seals. This seriously shortens the service life of the gate valve and limits its application. Utility Model Content

[0003] The utility model aims to provide a parallel double-disc gate valve with a guide hole, which solves the problem that the seals of the gate valves in the prior art are seriously worn during opening and closing, and most gate valves cannot be used any more due to damage and leakage of the seals.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a parallel double-disc gate valve with a diversion hole, comprising a valve body, a hand wheel is arranged at the upper end of the valve body, a valve stem is arranged on the hand wheel, a connecting plate is arranged inwardly through the valve body at the lower end of the valve stem, a first connecting rod and a second connecting rod are arranged at both ends of the connecting plate, and the first connecting rod and the second connecting rod are rotatably connected;

[0005] The first connecting rod and the second connecting rod are provided with slots inside, rollers are arranged at both ends of the connecting plate, and the rollers are movably connected inside the slots. The two ends of the first connecting rod are rotatably connected with rotating shafts, and the other end of the rotating shaft is provided with a valve plate.

[0006] As a further description of the above technical solution: a slider is fixedly connected to the other end of the rotating shaft, a sliding groove is provided on the valve plate, and the slider is slidably connected inside the sliding groove.

[0007] As a further description of the above technical solution: a limiting groove is provided inside the valve body, and the outer end of the valve plate is fixedly connected to a limiting block, and the limiting block corresponds to the limiting groove.

[0008] As a further description of the above technical solution: the bottom of the valve body is fixedly connected to two fixing seats, and the interior of the fixing seats is fixedly connected to a driving motor.

[0009] As a further description of the above technical solution: the output end of the driving motor is fixedly connected to a screw rod, a positioning rod is threadedly connected to the screw rod, and the other end of the positioning rod passes through the valve body inwardly corresponding to the limit block.

[0010] As a further description of the above technical solution: connecting pieces are provided at both ends of the valve body, and mounting pieces are fixedly connected inside the connecting pieces.

[0011] As a further description of the above technical solution: positioning grooves are provided at both ends of the inner side of the mounting member, positioning blocks are correspondingly provided inside the positioning grooves, a filter is fixedly connected inside the positioning blocks, and positioning bolts are connected to the internal threads of the positioning blocks and the positioning grooves.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with the prior art, the parallel double-disc gate valve with diversion holes can drive the two connecting rods to cross relative movement by setting the valve stem, the connecting plate and the roller, so that the limit blocks at the outer ends of the two valve plates correspond to the limit grooves, so that the valve plates can block the flow channel, and can realize double positioning under the action of the bottom fixed seat, the driving motor, the screw and the positioning rod, thereby improving the strength of the entire valve body. At the same time, the parallel double-disc gate valve of the utility model has no friction between the gate and the valve seat during the opening and closing process, which greatly reduces the wear of the seal and prolongs the service life of the valve;

[0014] 2. Compared with the prior art, this parallel double-disc gate valve with guide holes can filter the fluid passing through the valve body by arranging a filter screen inside the mounting parts and the connecting parts, thereby preventing impurities from entering the interior of the valve body and affecting the sealing of the valve plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a cross-sectional view of the utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure of A.

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of B.

[0020] Figure 4This is a schematic diagram of the internal structure of the fixing seat of the utility model.

[0021] Figure 5 This is a schematic diagram of the filter structure of the utility model

[0022] Legend:

[0023] 1. Handwheel; 2. Valve stem; 3. Valve body; 4. Slide; 5. Flow channel; 6. Connector; 7. Slider; 8. First connecting rod; 9. Fixed seat; 10. Rotating shaft; 11. Second connecting rod; 12. Positioning rod; 13. Connecting plate; 14. Slot; 15. Roller; 16. Drive motor; 17. Limiting groove; 18. Limiting block; 19. Valve plate; 20. Filter; 21. Positioning bolt; 22. Positioning groove; 23. Mounting piece; 24. Positioning block; 25. Second connecting rod; 26. Screw. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0025] Reference Figure 1-5 The utility model provides an embodiment of a parallel double-disc gate valve with a guide hole, comprising a valve body 3, a hand wheel 1 is arranged at the upper end of the valve body 3, a valve stem 2 is arranged on the hand wheel 1, and a connecting plate 13 is arranged inwardly through the valve body 3 at the lower end of the valve stem 2. By rotating the hand wheel 1, the valve stem 2 and the connecting plate 13 can be driven to move downward, and a first connecting rod 8 and a second connecting rod 11 are arranged at both ends of the connecting plate 13. The first connecting rod 8 and the second connecting rod 11 are rotatably connected. Under the action of the connecting plate 13, the two connecting rods can be made to cross-move, thereby driving the valve plates 19 at both ends to block the flow channel 5;

[0026] The first connecting rod 8 and the second connecting rod 11 are provided with slots 14 inside, and rollers 15 are provided at both ends of the connecting plate 13, and the rollers 15 are movably connected inside the slots 14. The two ends of the first connecting rod 8 are rotatably connected with the rotating shaft 10, and the other end of the rotating shaft 10 is provided with a valve plate 19 buried in the slots 14 and the rollers 15, so as to ensure that the connecting plate 13 drives the two valve plates 19 to be stored and opened, thereby improving its stability during use;

[0027] The other end of the rotating shaft 10 is fixedly connected with a slider 7, a slide groove 4 is provided on the valve plate 19, and the slider 7 is slidably connected inside the slide groove 4. By arranging the slider 7 and the slide groove 4, the stable sliding of the rotating shaft 10 can be ensured. A limiting groove 17 is provided inside the valve body 3, and a limiting block 18 is fixedly connected to the outer end of the valve plate 19. The limiting block 18 corresponds to the limiting groove 17. Two fixing seats 9 are fixedly connected to the bottom of the valve body 3. A driving motor 16 is fixedly connected inside the fixing seat 9. A screw 26 is fixedly connected to the output end of the driving motor 16. A positioning rod 12 is threadedly connected to the screw 26, and the other end of the positioning rod 12 passes through the valve body. 3 inwardly corresponds to the limit block 18, and the rollers 15 and the slots 14 at both ends of the connecting plate 13 can make the first connecting rod 8 and the second connecting rod 11 do cross movement, so that the limit blocks 18 on the outer sides of the valve plates 19 at both ends cooperate with the limit grooves 17 to achieve the closing effect on the flow channel 5, and then start the driving motor 16 at the bottom to make the screw 26 rotate, and under the action of the threaded connection, the positioning rod 12 can move upward, so that it can be clamped with the limit block 18 to achieve its double positioning, prevent the valve plate 19 from being damaged due to excessive impact force, and improve the overall strength of the valve body;

[0028] Connecting pieces 6 are provided at both ends of the valve body 3, and mounting pieces 23 are fixedly connected inside the connecting pieces 6. The connecting pieces 6 can be connected to external pipes through the connecting pieces 6 to improve the convenience of the device. Positioning grooves 22 are provided at both ends of the inner side of the mounting piece 23, and positioning blocks 24 are correspondingly provided inside the positioning grooves 22. A filter screen 20 is fixedly connected inside the positioning block 24, and a positioning bolt 21 is connected to the internal threads of the positioning block 24 and the positioning groove 22. By setting the filter screen 20, the fluid passing through the valve body can be filtered to prevent impurities from entering the interior of the valve body 3 and affecting the sealing of the valve plate 19. At the same time, the positioning and installation function can be achieved under the action of the positioning block 24 and the positioning groove 22, which is convenient for the staff to regularly replace and clean it and improve the filtering effect.

[0029] Working principle: When the device is in use and the valve body 3 needs to be closed, rotating the hand wheel 1 can drive the valve plate 2 and the connecting plate 13 to move downward, and the rollers 15 and the slots 14 at both ends of the connecting plate 13 can make the first connecting rod 8 and the second connecting rod 11 do cross movement, so that the limit blocks 18 on the outside of the valve plates 19 at both ends cooperate with the limit grooves 17 to achieve the closing effect on the flow channel 5, and then starting the driving motor 16 at the bottom can make the screw 26 rotate, and under the action of the threaded connection, the positioning rod 12 can move upward, so that it can be clamped with the limit block 18 to achieve its double positioning, prevent the valve plate 19 from being damaged by excessive impact force, and improve the overall strength of the valve body. At the same time, the parallel double-disc gate valve of the utility model has no friction between the gate and the valve seat during the opening and closing process, which greatly reduces the wear of the seal and extends the service life of the valve.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A parallel double-disc gate valve with a diversion hole, comprising a valve body (3), It is characterized in that A hand wheel (1) is arranged at the upper end of the valve body (3), a valve stem (2) is arranged on the hand wheel (1), a connecting plate (13) is arranged inwardly through the lower end of the valve stem (2) passing through the valve body (3), a first connecting rod (8) and a second connecting rod (11) are arranged at both ends of the connecting plate (13), and the first connecting rod (8) and the second connecting rod (11) are rotatably connected; The first connecting rod (8) and the second connecting rod (11) are provided with slots (14) inside, and rollers (15) are provided at both ends of the connecting plate (13). The rollers (15) are movably connected inside the slots (14). The two ends of the first connecting rod (8) are rotatably connected with a rotating shaft (10), and the other end of the rotating shaft (10) is provided with a valve plate (19).

2. A parallel double-disc gate valve with diversion holes according to claim 1, It is characterized in that The other end of the rotating shaft (10) is fixedly connected with a sliding block (7), a sliding groove (4) is provided on the valve plate (19), and the sliding block (7) is slidably connected inside the sliding groove (4).

3. A parallel double-disc gate valve with diversion holes according to claim 1, It is characterized in that A limiting groove (17) is provided inside the valve body (3), and the outer end of the valve plate (19) is fixedly connected to a limiting block (18), wherein the limiting block (18) corresponds to the limiting groove (17).

4. A parallel double-disc gate valve with diversion holes according to claim 1, It is characterized in that Two fixing seats (9) are fixedly connected to the bottom of the valve body (3), and a driving motor (16) is fixedly connected inside the fixing seat (9).

5. A parallel double-disc gate valve with diversion holes according to claim 4, It is characterized in that The output end of the driving motor (16) is fixedly connected to a screw rod (26), a positioning rod (12) is threadedly connected to the screw rod (26), and the other end of the positioning rod (12) passes through the valve body (3) and inwardly corresponds to the limit block (18).

6. A parallel double-disc gate valve with diversion holes according to claim 1, It is characterized in that Connecting pieces (6) are provided at both ends of the valve body (3), and a mounting piece (23) is fixedly connected inside the connecting piece (6).

7. A parallel double-disc gate valve with diversion holes according to claim 6, It is characterized in that Positioning grooves (22) are provided at both ends of the inner side of the mounting member (23), and positioning blocks (24) are correspondingly provided inside the positioning grooves (22). A filter screen (20) is fixedly connected inside the positioning blocks (24), and positioning bolts (21) are threadedly connected between the positioning blocks (24) and the inner part of the positioning grooves (22).

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