Flat gate valve convenient for cleaning dirt

Abstract

According to the technical scheme, the flat gate valve is characterized by comprising a valve body and a gate plate located in the valve body, an injection port and a sewage outlet are formed in the two ends of the bottom of the valve body, and the injection port and the sewage outlet are in threaded connection with an inlet bolt and an outlet bolt respectively; a dirt containing through groove with the length parallel to the straight line where the injection port and the dirt outlet are located is formed in the bottom face of the gate plate, an opening of the dirt containing through groove faces the bottom face of an inner cavity of the valve body, a stirring piece capable of being contained in the dirt containing through groove and penetrating through the dirt outlet is arranged in the valve body, and the two ends of the stirring piece are connected with the inlet bolt and the outlet bolt in an inserted mode respectively. The stirring piece can rotate relative to the inlet bolt along with the outlet bolt, dirt on the bottom face of the inner cavity of the valve body is stirred by the stirring piece to become loose by rotating the outlet bolt, the dirt in the valve body is brought out by taking the stirring piece out of the dirt outlet, and the problems that in the prior art, dirt is difficult to clean, and the application range is small are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, and more specifically to a flat gate valve convenient for cleaning dirt. Background Technique

[0002] At present, most of the gate plates of flat gate valves adopt a lower diversion hole structure. During operation, the gate plate is driven to move up and down by the valve stem, and the valve seat and the gate plate together form the opening and closing of the valve. During the up and down movement of the gate plate of an ordinary flat gate valve, a large part of the dirt in the pipeline will enter the valve cavity through the channel formed between the gate plate and the valve body and the valve seat along with the flowing medium and accumulate at the bottom of the valve cavity, resulting in the gate plate being unable to move downward to close in place. If the dirt is not removed in time, it will affect the normal operation and service life of the flat gate valve, causing economic losses.

[0003] At present, Chinese Patent No. CN206280567U discloses a flat gate valve that can discharge sewage. By respectively arranging an injection port and a sewage outlet at both ends of the bottom of the valve body, water can be poured into the valve body to discharge the dirt from the valve body. Although it achieves the function of cleaning dirt to a certain extent, there are still defects. First, during long-term use, the gate plate moves downward multiple times and generates a downward extrusion force on the dirt accumulated at the bottom of the valve body. The dirt is prone to become compact and has a large adhesion to the inner wall of the valve body. When the dirt is pressed down, it will extend around the bottom end of the gate plate, and the dirt is easy to block the injection port and the sewage outlet. Subsequently, a greater water pressure is required to inject water into the valve body, which is likely to cause irreversible damage to the valve body. At the same time, the dirt at the sewage outlet is not subjected to sufficient water pressure to be washed away, resulting in the phenomenon that it is difficult to discharge the water from the sewage outlet after the water enters the valve body, and the sewage discharge efficiency is low. Second, the prior art can only clean the dirt at the bottom of the valve body when the medium is flowing, that is, when the gate plate does not touch the bottom of the valve body. Otherwise, the gate plate will hinder the cleaning of the dirt, and the applicable range is small. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a flat gate valve that is convenient for discharging dirt and has a wide applicable range.

[0005] To achieve the above object, the present utility model provides the following technical solution: a flat gate valve facilitating dirt cleaning, comprising a valve body and a gate plate positioned within the valve body. At both ends of the bottom of the valve body, there are provided an injection port and a dirt outlet. The injection port and the dirt outlet are respectively threadedly connected with an inlet bolt and an outlet bolt. On the bottom surface of the gate plate, there is provided a dirt-containing through groove with a length parallel to the straight line where the injection port and the dirt outlet are located. The opening of the dirt-containing through groove faces the bottom surface of the inner cavity of the valve body. Inside the valve body, there is provided a stirring member that can be accommodated in the dirt-containing through groove and pass through the dirt outlet. Both ends of the stirring member are respectively inserted into the inlet bolt and the outlet bolt. The stirring member can rotate relative to the inlet bolt along with the outlet bolt. By rotating the outlet bolt, the dirt on the bottom surface of the inner cavity of the valve body is stirred by the stirring member and becomes loose. By taking out the stirring member from the dirt outlet, the dirt inside the valve body is taken out.

[0006] As a further improvement of the present utility model, the stirring member includes a stirring shaft coaxial with the outlet bolt, a plurality of groups of stirring blades distributed along the length direction of the stirring shaft, a clamping portion and a rotating portion respectively located at both ends of the stirring shaft. The clamping portion is coaxially inserted into the outlet bolt and can rotate synchronously with the outlet bolt. The rotating portion is coaxially inserted into the inlet bolt and can rotate relative to the inlet bolt.

[0007] As a further improvement of the present utility model, each of the plurality of groups of stirring blades includes a plurality of stirring blades circumferentially distributed around the axis of the stirring shaft. The stirring blades between adjacent groups of stirring blades are all offset from each other.

[0008] As a further improvement of the present utility model, each of the plurality of groups of stirring blades further includes reinforcing ribs located between adjacent stirring blades.

[0009] As a further improvement of the present utility model, through-flow openings are provided on the opposite groove walls of the dirt-containing through groove.

[0010] The beneficial effects of the present utility model: By rotating the outlet bolt, the dirt on the bottom surface of the inner cavity of the valve body is stirred by the stirring member and becomes loose. By taking out the stirring member from the dirt outlet, the dirt inside the valve body is taken out. Such a design can reduce the extrusion degree of the dirt by the gate plate and loosen the dirt by the stirring member compared with the prior art. Both methods can ensure that the dirt remains soft and has fluidity, which is conducive to the smooth entry of water into the valve body and the cleaning of dirt, effectively improving the maintenance efficiency; Whether the gate plate touches the bottom of the valve body or not, water can enter the valve body and clean the dirt, so that maintenance personnel can perform maintenance at any time, and the applicable range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the front view of the present utility model;

[0012] Figure 2 is Figure 1 the right view below A-A in and after the gate plate moves downward in place.

[0013] Figure 3 For Figure 2 the three-dimensional explosion diagram;

[0014] Figure 4 This is the three-dimensional diagram of the stirring member in the present utility model.

[0015] Reference numerals: 1, valve body; 11, injection port; 12, sewage outlet; 13, inlet bolt; 14, outlet bolt; 2, gate plate; 3, sewage holding through groove; 31, flow-through port; 4, stirring member; 41, stirring shaft; 42, stirring blade group; 43, clamping portion; 44, rotating portion; 45, stirring blade; 46, reinforcing rib. Specific embodiments

[0016] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. The same components are denoted by the same reference numerals.

[0017] Referring to Figures 1 to 4 As shown, a flat gate valve for facilitating the cleaning of dirt in this embodiment includes a valve body 1 and a gate plate 2 positioned within the valve body 1. The valve body 1 includes a flow channel for the flow of the medium and a plate chamber located at a height lower than the height of the flow channel and for the gate plate 2 to extend into. At both ends of the bottom of the plate chamber, an injection port 11 and a sewage outlet 12 are provided. The injection port 11 and the sewage outlet 12 are respectively threadedly connected with an inlet bolt 13 and an outlet bolt 14. The outer contour of the gate plate 2 is rectangular, the cross-section of the flow channel is circular, and the thickness of the gate plate 2 is less than the width of the inner cavity of the plate chamber;

[0018] Based on the foregoing prior art, a sewage holding through groove 3 extending in the width direction of the gate plate 2 is machined by turning on the bottom surface of the gate plate 2 facing the bottom of the plate chamber. The opening of the sewage holding through groove 3 faces the bottom surface of the inner cavity of the plate chamber. Cylindrical grooves and polygonal grooves are respectively machined coaxially on the facing surfaces of the inlet bolt 13 and the outlet bolt 14. The stirring member 4 includes a stirring shaft 41, a plurality of stirring blade groups 42 distributed along the length direction of the stirring shaft 41, a clamping portion 43 and a rotating portion 44. The clamping portion 43 and the rotating portion 44 are integrally formed at both ends of the stirring shaft 41 respectively. The maximum distance between the clamping portion 43 and the rotating portion 44 is close to the maximum distance between the injection port 11 and the sewage outlet 12. The clamping portion 43 is a prism and matches the polygonal groove of the outlet bolt 14. The rotating portion 44 is a cylinder and matches the cylindrical groove of the inlet bolt 13. Each of the plurality of stirring blade groups 42 includes a plurality of stirring blades 45 distributed circumferentially around the axis of the stirring shaft 41. The diameter of the maximum trajectory circle formed by the rotation of the stirring blade group 42 along with the stirring blade 45 is less than the inner diameter of the sewage outlet 12 and less than the inner cavity contour size of the sewage holding through groove 3;

[0019] During the assembly process, the stirring member 4 is passed through the sewage outlet 12 and placed inside the plate chamber. The clamping portion 43 and the rotating portion 44 are respectively located inside the sewage outlet 12 and the injection port 11. The end of the inlet bolt 13 is inserted into the injection port 11 and abuts against the threaded end on the inner wall of the injection port 11. At this time, one end of the rotating portion 44 extends into the cylindrical groove. The end of the outlet bolt 14 is inserted into the sewage outlet 12 and abuts against the threaded end on the inner wall of the sewage outlet 12. At this time, one end of the clamping portion 43 extends into the polygonal groove. The stirring member 4 is suspended relative to the bottom surface of the inner cavity of the plate chamber because both ends are supported. Subsequently, the inlet bolt 13 is screwed onto the injection port 11 in place. During the screwing process, the rotating portion 44 rotates relative to the inlet bolt 13 and will gradually penetrate into the inlet bolt 13. Then, the outlet bolt 14 is screwed onto the sewage outlet 12 in place. During the screwing process, the stirring member 4 rotates synchronously with the outlet bolt 14. The clamping portion 43 gradually penetrates into the outlet bolt 14 and the rotating portion 44 rotates relative to the inlet bolt 13;

[0020] During the process of the gate plate 2 moving towards the bottom of the plate chamber, the two opposite groove walls of the sewage-containing through groove 3 are inserted into the sewage at the bottom of the plate chamber and squeeze the sewage towards the periphery of the groove walls. The sewage accumulates respectively in the gap between the plate chamber and the gate plate 2 and the inner cavity of the sewage-containing through groove 3 until the opposite groove walls of the sewage-containing through groove 3 both abut against the bottom surface of the inner cavity of the plate chamber, and the gate plate 2 moves in place. At this time, the two ends of the sewage-containing through groove 3 are respectively facing the injection port 11 and the sewage outlet 12. The stirring member 4 is located inside the sewage-containing through groove 3 and is submerged by the sewage. The sewage in the plate chamber is in a relaxed state and maintains fluidity because it has not been fully squeezed, and there may also be a situation where too much sewage remains uncleaned in time. Then the sewage becomes relatively compact under pressure in the sewage-containing through groove 3. During the maintenance process, if the gate plate 2 is not lifted upwards, a receiving box is placed at the sewage outlet 12. Then the outlet bolt 14 is rotated, and the stirring member 4 rotates with the outlet bolt 14 to stir the sewage in the sewage-containing through groove 3. As the outlet bolt 14 is removed from the sewage outlet 12, the clamping portion 43 is separated from the outlet bolt 14. The sewage in the sewage-containing through groove 3 flows through the sewage outlet 12 and drips into the receiving box due to the height difference. After the sewage flow slows down or stops flowing out, use pliers or tweezers to clamp the clamping portion 43 and pull the stirring member 4 out of the plate chamber from the sewage outlet 12. When the stirring member 4 is removed, a part of the sewage will also be taken out. Subsequently, a drainage pipe can be installed at the sewage outlet 12 and one end of the drainage pipe extends into the receiving box. Then the inlet bolt 13 is removed and a water pump or a water injection gun is installed at the injection port 11. The water pump or the water injection gun is started, and the water enters from the injection port 11 and flushes the sewage remaining in the sewage-containing through groove 3. Immediately afterwards, the water will carry the sewage and flow out from the sewage outlet 12. After the sewage and the stirring member 4 are cleaned, the stirring member 4, the inlet bolt 13, and the outlet bolt 14 are reinstalled on the valve body 1 through the assembly operation again,

[0021] During subsequent use, the dirt stuck between the gate plate 2 and the inner wall of the plate chamber will flow back to the center of the bottom of the plate chamber after the gate plate 2 moves upward, thus controlling the amount of dirt within a certain level. If the gate plate 2 is lifted upward, a receiving box is placed at the dirt outlet 12, and then the outlet bolt 14 is rotated. The stirring member 4 rotates with the outlet bolt 14 to stir the dirt on the bottom surface of the inner cavity of the plate chamber. As the outlet bolt 14 disengages from the dirt outlet 12, the clamping portion 43 separates from the outlet bolt 14, and the dirt in the plate chamber flows through the dirt outlet 12 and drips into the receiving box due to the height difference. After the dirt flow slows down or stops, use pliers or tweezers to hold the clamping portion 43 and pull the stirring member 4 out of the plate chamber from the dirt outlet 12. When the stirring member 4 is removed, a part of the dirt will also be taken out. Subsequently, a drainage pipe can be installed at the dirt outlet 12 and one end of the drainage pipe extends into the receiving box. Then, the inlet bolt 13 is removed and a water pump or a water injection gun is installed at the injection port 11. The water pump or the water injection gun is started, and water enters from the injection port 11 and flushes the dirt remaining in the plate chamber. Immediately afterwards, the water will carry the dirt and flow out from the dirt outlet 12. After the dirt and the stirring member 4 are cleaned, the stirring member 4, the inlet bolt 13, and the outlet bolt 14 are reinstalled onto the valve body 1 through an assembly operation;

[0022] Such a design can reduce the degree of extrusion of the dirt by the gate plate 2 and loosen the dirt by the stirring member 4 compared with the prior art. Both methods can ensure that the dirt remains soft and has fluidity, which is conducive to the smooth entry of water into the valve body 1 and the cleaning of the dirt, effectively improving the maintenance efficiency; Whether the gate plate 2 touches the bottom of the valve body 1 or not, water can enter the valve body 1 to clean the dirt, so that maintenance personnel can perform maintenance at any time, and the scope of application is wider.

[0023] As a specific implementation of the improvement, referring to Figure 4 As shown, the stirring blades 45 between adjacent stirring blade groups 42 are all staggered from each other. During the stirring process, the stirring times of adjacent dirt are out of sync, which increases the fluidity of the dirt generated by stirring; During the process of removing the stirring member 4 from the valve body 1, the amount of dirt taken out by the stirring member 4 can be increased, improving the sewage discharge efficiency.

[0024] As a specific implementation of the improvement, referring to Figure 4 As shown, each of the multiple stirring blade groups 42 further includes a reinforcing rib 46 located between adjacent stirring blades 45. Such a design can improve the connection stability between the stirring blade 45 and the stirring shaft 41 and avoid the phenomenon of the stirring blade 45 breaking.

[0025] As a specific implementation of the improvement, referring to Figure 2 and Figure 3As shown, flow-through openings 31 are provided on the opposite groove walls of the dirt-containing through-groove 3. When the gate plate 2 abuts against the bottom surface of the plate chamber, after the dirt in the dirt-containing through-groove 3 is pushed away, the dirt between the gate plate 2 and the inner wall of the plate chamber will pass through the flow-through opening 32 and flow into the dirt-containing through-groove 3, and finally be discharged from the valve body 1 at the dirt outlet 12. Such a design can accelerate the cleaning of the dirt on both sides of the dirt-containing through-groove 3 and further improve the cleaning efficiency; further explanation, the number of the flow-through openings 32 can be determined according to production requirements on the premise of ensuring the structural strength of the dirt-containing through-groove 3.

[0026] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A flat gate valve for easy cleaning of dirt, comprising a valve body (1) and a gate plate (2) positioned in the valve body (1), wherein an inlet (11) and a dirt outlet (12) are provided at both ends of the bottom of the valve body (1), wherein the inlet (11) and the dirt outlet (12) are respectively threadedly connected with an inlet bolt (13) and an outlet bolt (14), and wherein: The bottom surface of the gate plate (2) is provided with a dirt-receiving groove (3) whose length is parallel to the straight line where the injection port (11) and the dirt-receiving groove (12) are located. The opening of the dirt-receiving groove (3) faces the bottom surface of the inner cavity of the valve body (1). The valve body (1) is provided with a stirring member (4) which can be accommodated in the dirt-receiving groove (3) and pass through the dirt-receiving groove (12). The two ends of the stirring member (4) are respectively plugged with the inlet bolt (13) and the outlet bolt (14). The stirring member (4) can rotate relative to the inlet bolt (13) along with the outlet bolt (14). By rotating the outlet bolt (14), dirt on the bottom surface of the inner cavity of the valve body (1) is stirred by the stirring member (4) and becomes loose. By removing the stirring member (4) from the dirt-receiving groove (12), the dirt in the valve body (1) is taken out.

2. A flat gate valve that is easy to clean dirt according to claim 1, characterized in that: The stirring member (4) comprises a stirring shaft (41) coaxial with the outlet bolt (14), a plurality of stirring blade groups (42) distributed along the length direction of the stirring shaft (41), a clamping portion (43) and a rotating portion (44) respectively located at both ends of the stirring shaft (41), the clamping portion (43) being coaxially plugged with the outlet bolt (14) and being capable of rotating synchronously with the outlet bolt (14), and the rotating portion (44) being coaxially plugged with the inlet bolt (13) and being capable of rotating relative to the inlet bolt (13).

3. A flat gate valve that is easy to clean dirt according to claim 2, characterized in that: The plurality of stirring blade groups (42) each comprises a plurality of stirring blades (45) distributed in a circumferential manner around the axis of the stirring shaft (41), and the stirring blades (45) between adjacent stirring blade groups (42) are staggered with respect to each other.

4. A flat gate valve that is easy to clean dirt according to claim 3, characterized in that: The plurality of stirring blade groups (42) also include reinforcing ribs (46) located between adjacent stirring blades (45).

5. A flat gate valve for easy cleaning of dirt according to claim 1, 2, 3 or 4, characterized in that: The groove walls facing each other of the sewage containing groove (3) are both provided with flow-through openings (31).

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