Flat gate valve convenient to maintain

Abstract

According to the technical scheme, the flat gate valve convenient to maintain is characterized in that the flat gate valve comprises a valve body and a gate plate located in the valve body, the valve body comprises a flow channel allowing media to circulate and a plate chamber allowing the gate plate to be contained, the two ends of the bottom of the plate chamber are provided with an injection port and a sewage outlet respectively, and the injection port and the sewage outlet are both in threaded connection with leakage-proof bolts; the bottom face of the plate chamber is provided with an open groove, the two ends of the open groove are communicated with the injection port and the dirt outlet respectively, the width of the open groove is smaller than that of the gate plate, a dirt moving piece capable of penetrating through the dirt outlet and bearing dirt is arranged in the open groove, the two ends of the dirt moving piece are communicated with the injection port and the dirt outlet respectively, and the dirt is brought out of the plate chamber by moving the dirt moving piece out of the plate chamber. The problem that dirt is difficult to clean in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, and more particularly to a flat gate valve which is easy to maintain. Background Art

[0002] At present, most flat gate valves use a lower guide hole structure. When working, the gate is driven up and down by the valve stem, and the valve seat and the gate together form the opening and closing of the valve. During the up and down movement of the gate 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, the valve body and the valve seat as the medium flows, and accumulate at the bottom of the valve cavity, resulting in the gate being unable to move down and 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, a Chinese patent with announcement number CN206280567U discloses a flat gate valve that can discharge sewage. The valve body is provided with an injection port and a sewage outlet at both ends of the bottom of the valve body, respectively, so that water can be poured into the valve body and sewage can be discharged from the valve body. Although the sewage cleaning effect is achieved to a certain extent, there are still defects. During long-term use, the gate plate moves downward many times and exerts a downward squeezing force on the sewage accumulated at the bottom of the valve body. The sewage is easy to become compact and has a strong adhesion to the inner wall of the valve body. When the sewage is pressed down, it will extend around the bottom of the gate plate. The sewage is easy to block the injection port and the sewage outlet. Subsequently, a larger water pressure is required to inject water into the valve body, which is easy to cause irreversible damage to the valve body. At the same time, the sewage at the sewage outlet fails to receive sufficient water pressure and is dispersed, resulting in the phenomenon that water is difficult to be discharged from the sewage outlet after entering the valve body, and the sewage discharge efficiency is low. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a flat gate valve which has smooth sewage discharge and is easy to maintain.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flat gate valve which is easy to maintain, comprising a valve body and a gate plate positioned in the valve body, the valve body comprising a flow channel for medium circulation and a plate chamber for accommodating the gate plate, an injection port and a sewage outlet are respectively arranged at two ends of the bottom of the plate chamber, the injection port and the sewage outlet are both threadedly connected with leakage-proof bolts, a groove is arranged on the bottom surface of the plate chamber, and two ends of the groove are respectively connected with the injection port and the sewage outlet, the width of the groove is smaller than the width of the gate plate, a dirt moving piece which can pass through the sewage outlet and can receive dirt is arranged in the groove, the two ends of the dirt moving piece are respectively connected with the injection port and the sewage outlet, and the dirt is brought out of the plate chamber by moving the dirt moving piece out of the plate chamber.

[0006] As a further improvement of the present utility model, lugs are provided at both ends of the dirt transfer member. The two lugs respectively extend into the injection port and the dirt outlet. The two lugs are both arranged parallel to the horizontal plane. On the end faces of the two anti-leakage bolts facing each other, limiting columns located directly above the corresponding lugs are coaxially arranged. By clamping and pulling the lugs, the dirt transfer member can be quickly removed from the plate chamber.

[0007] As a further improvement of the present utility model, two support blocks for supporting the lugs and symmetrically supported with respect to the center line of the corresponding lugs are provided on the inner walls of the injection port and the dirt outlet.

[0008] As a further improvement of the present utility model, a stress hole for hooking by a hook is provided on the lug located in the dirt outlet.

[0009] As a further improvement of the present utility model, a plurality of vertical rods located on the same wavy line and distributed along the length direction of the dirt transfer member are provided on the bottom surface of the inner cavity of the dirt transfer member.

[0010] As a further improvement of the present utility model, the bottom surfaces on both sides of the opening of the slot are both inclined with respect to the horizontal plane. Oblique cutting surfaces capable of fitting with the bottom surfaces on both sides of the opening of the slot are provided on the two edges of the bottom surface of the gate plate parallel to the length direction of the slot.

[0011] The beneficial effects of the present utility model: By removing the dirt transfer member from the plate chamber, the dirt is taken out of the plate chamber. Such a design can effectively clean the dirt in the plate chamber during any maintenance period compared with the prior art; Whether the gate plate touches the bottom surface of the plate chamber or not, water can enter the plate chamber 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

[0012] Figure 1 is the main sectional view of the present utility model;

[0013] Figure 2 is Figure 1 the right sectional view below A-A in

[0014] Figure 3 and with the gate plate moved down in place; Figure 1 is

[0015] Figure 4 the front view below A-A in Figure 1 and with the gate plate not moved down in place;

[0016] Figure 5 is Figure 1 the exploded view below A-A in

[0017] Figure 6This is a perspective view of the dirt transfer component in the present utility model.

[0018] Reference numerals: 1, valve body; 11, flow channel; 12, plate chamber; 13, injection port; 14, dirt outlet; 15, leak-proof bolt; 16, slot; 17, limit post; 18, support block; 2, gate plate; 21, bevel surface; 3, dirt transfer component; 31, lug; 32, stress hole; 33, vertical rod. Detailed implementation manners

[0019] The present utility model will be further described in detail below with reference to the drawings and embodiments. The same components are denoted by the same reference numerals.

[0020] Refer to Figures 1 to 6 As shown, a flat gate valve convenient for maintenance in this embodiment includes a valve body 1 and a gate plate 2 positioned inside the valve body 1. The valve body 1 includes a flow channel 11 for medium flow and a plate chamber 12 for accommodating the gate plate 2. The outer contour of the gate plate 2 is rectangular, the cross-section of the flow channel is circular, injection ports 13 and dirt outlets 14 are respectively arranged at both ends of the bottom of the plate chamber 12, and leak-proof bolts 15 are threadedly connected to both the injection port 13 and the dirt outlet 14;

[0021] Based on the aforementioned prior art, the lowest point heights of both the injection port 13 and the dirt outlet 14 are less than the bottom surface height of the plate chamber 12. A slot 16 located on the straight line where the injection port 13 and the dirt outlet 14 are located is machined on the bottom surface of the plate chamber 12. The bottom height of the slot 16 is greater than the lowest point heights of both the injection port 13 and the dirt outlet 14. The opening of the slot 16 faces the gate plate 2 and is respectively communicated with the injection port 13 and the dirt outlet 14 at both ends. The width of the slot 16 is less than the width of the gate plate 2. The structure of the dirt transfer component 3 is similar to that of a channel steel. The outer contour of the dirt transfer component 3 matches the inner cavity contour of the slot 16. The height of the dirt transfer component 3 is less than or equal to the height of the inner cavity of the slot 16. The length of the dirt transfer component 3 is the same as the length of the slot 16. Flat lugs 31 are integrally formed at both ends of the bottom of the dirt transfer component 3. Both leak-proof bolts 15 include nuts, studs coaxially connected to the nuts and capable of being threadedly connected to the plate chamber 12, and limit posts 17 coaxially arranged with the studs and having a diameter smaller than that of the studs;

[0022] During the assembly process, the dirt removal part 3 is inserted through the dirt outlet 14 and into the slot 16. One of the lugs 31 of the dirt removal part 3 is close to the orifice on the outer wall of the plate chamber 12 of the dirt outlet 14. Subsequently, the limit post 17 of a leak-proof bolt 15 is inserted into the dirt outlet 14, and the limit post 17 is located above the lug 31 until the stud end of the leak-proof bolt 15 touches the orifice of the dirt outlet 14. Then, the leak-proof bolt 15 is rotated so that the stud gradually screws into the dirt outlet 14. The end face of the stud first touches one end of the lug 31 and pushes the dirt removal part 3 to move linearly in the slot 16. When the thread connection between the dirt outlet 14 and the leak-proof bolt 15 is in place, the position of the dirt removal part 3 in the slot 16 is determined and the other lug 31 at the other end of the dirt removal part 3 is located in the injection port 13. Finally, another leak-proof bolt 15 is screwed onto the injection port 13, and the limit post 17 of the other leak-proof bolt 15 is located above the corresponding lug 31. Subsequently, it can be put into use;

[0023] After the gate plate 2 is moved into the plate chamber 12 in place, the bottom surface of the gate plate 2 touches the bottom surfaces on both sides of the opening of the slot 16. The gate plate 2 is located directly above the dirt removal part 3. The dirt in the plate chamber 12 precipitates in the dirt removal part 3. When the maintenance period is short, the dirt in the dirt removal part 3 is not compacted by the gate plate 2 and is in a relaxed state. Whether the gate plate 2 touches the bottom surface of the plate chamber 12 or not, the maintenance personnel can place a receiving box at the sewage outlet 14. Then, the leak-proof bolt 15 at the sewage outlet 14 is removed. The dirt in the dirt removal part 3 flows through the sewage outlet 14 and drips into the receiving box due to the height difference. After the dirt flow slows down or stops flowing, a drainage pipe can be installed at the sewage outlet 14 and one end of the drainage pipe extends into the receiving box. Then, the leak-proof bolt 15 at the injection port 13 is removed and a water pump or a water injection gun is installed. The water pump or the water injection gun is started. Water enters from the injection port 13 and flushes the dirt remaining in the dirt removal part 3. Immediately afterwards, the water will carry the dirt and flow out from the sewage outlet 14. After the dirt is cleaned up and the dirt removal part 3 is cleaned up, the objects installed at the injection port 13 and the sewage outlet 14 are removed. The dirt removal part 3 is reinstalled into the slot 16. Finally, the leak-proof bolt 15 is screwed on again; when the maintenance period is long, the dirt in the dirt removal part 3 is sufficient and is compacted by the gate plate 2, and the dirt cannot flow. The maintenance personnel remove the leak-proof bolt 15 at the sewage outlet 14. Due to the fact that the limit post 17 is above the lug 31, there is space above the lug 31. A pair of tweezers or pliers is inserted into the sewage outlet 14 and the lug 31 is clamped. Then, a pulling force is applied to pull the dirt removal part 3 out of the plate chamber 12. If the gate plate 2 does not touch the bottom surface of the plate chamber 12, the dirt in the dirt removal part 3 and the dirt removal part 3 are synchronously removed from the plate chamber 12. If the gate plate 2 touches the bottom surface of the plate chamber 12, the dirt breaks during the pulling process due to the adhesion force with the bottom surface of the gate plate 2. In the above two states of the gate plate 2, the maintenance personnel can remove the leak-proof bolt 15 at the injection port 13. Then, a water pump and a drainage pipe are respectively installed at the injection port 13 and the sewage outlet 14 for flushing operation. After the flushing is completed and the dirt removal part 3 is cleaned up, the dirt removal part 3 is reinstalled into the slot 16 and the leak-proof bolt 15 is screwed on again at the injection port 13 and the sewage outlet 14;

[0024] Such a design can effectively clean the dirt in the plate chamber 12 during any maintenance period compared with the prior art; whether the gate plate 2 touches the bottom surface of the plate chamber 12 or not, water can enter the plate chamber 12 to clean the dirt, which is convenient for the maintenance personnel to perform maintenance at any time and has a wider application range;

[0025] The design that the two lugs 31 are respectively located below the two limit posts 17 can avoid the phenomenon that the gate plate 2 drives the dirt removal part 3 to move upward due to the adhesion of the dirt to the dirt removal part 3, ensuring the connection stability of the dirt removal part 3 in the slot 16; at the same time, the lug 31 can provide an effective force application point for the maintenance personnel, facilitating the removal of the dirt removal part 3.

[0026] As a specific implementation of the improvement, when the maintenance period is relatively long, the dirt is extended above the two lugs 31 under the downward extrusion force of the gate plate 2 and generates a downward thrust on the lugs 31, which easily causes the lugs 31 to bend and affects the difficulty of subsequent tweezers or pliers to grip the lugs 31. To solve the aforementioned problems, refer to Figure 3 and Figure 5 As shown, two support blocks 18 for supporting the lugs 31 and symmetrically supported with respect to the center line of the corresponding lugs 31 are integrally formed on the inner walls of the injection port 13 and the dirt outlet 14. There is a space between the two support blocks 18 for the partial insertion of tweezers or pliers. Such a design can generate a supporting force on the lugs 31 through the support blocks 18, improve the bending resistance of the lugs 31, and thus ensure the structural stability of the lugs 31.

[0027] As a specific implementation of the improvement, refer to Figure 2 、 Figure 5 and Figure 6 As shown, a force-bearing hole 32 for hooking by a hook is processed on the lug 31 located in the dirt outlet 14. Maintenance personnel can use a tool with a hook to hook the lug 31 through the force-bearing hole 32. Such a design can expand the tools used by maintenance personnel, and at the same time, hooking the lug 31 can effectively avoid the phenomenon of slipping compared to clamping the lug 31, improving the efficiency of the transfer of the dirt removal part 3.

[0028] As a specific implementation of the improvement, refer to Figure 6 As shown, a plurality of vertical rods 33 located on the same wavy line and distributed along the length direction of the dirt removal part 3 are arranged on the bottom surface of the inner cavity of the dirt removal part 3. When water flows through the inner cavity of the dirt removal part 3, the flow direction of the water changes at the vertical rods 33, and at the same time, the water pressure can be increased during the process of flowing between adjacent two vertical rods 33, generating an effective thrust on the dirt; after the dirt is compacted, the plurality of vertical rods 33 are equivalent to the skeleton inside the dirt, and when the dirt removal part 3 is removed from the plate chamber 12 and the gate plate 2 is in contact with the bottom surface of the plate chamber 12, the possibility of the dirt breaking is reduced, so as to ensure that the dirt can be removed from the plate chamber 12 together with the dirt removal part 3 at one time, improving the dirt cleaning efficiency.

[0029] As a specific implementation of the improvement, refer to Figure 1 and Figure 4 As shown, the bottom surfaces on both sides of the opening of the slot 16 are inclined relative to the horizontal plane, and inclined cutting surfaces 21 that can be in contact with the bottom surfaces on both sides of the opening of the slot 16 are provided on the two edges of the bottom surface of the gate plate 2 parallel to the length direction of the slot 16. When the maintenance period is relatively short, it can accelerate the flow rate of the dirt on the bottom surface of the guide plate chamber 12 into the dirt removal part 3, avoid the phenomenon that the dirt stagnates on the bottom surface of the plate chamber 12 when the dirt removal part 3 is not fully filled, ensure the accurate contact between the gate plate 2 and the bottom surface of the plate chamber 12, and at the same time can fully clean the dirt in the plate chamber 12.

[0030] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. A flat gate valve that is easy to maintain, comprising a valve body (1) and a gate plate (2) positioned in the valve body (1), the valve body (1) comprising a flow channel (11) for medium circulation and a plate chamber (12) for accommodating the gate plate (2), an injection port (13) and a sewage outlet (14) are respectively provided at two ends of the bottom of the plate chamber (12), the injection port (13) and the sewage outlet (14) are both threadedly connected with anti-leakage bolts (15), and the characteristics are: The bottom surface of the plate chamber (12) is provided with a groove (16) whose two ends are respectively connected to the injection port (13) and the sewage outlet (14); the width of the groove (16) is smaller than the width of the gate plate (2); a dirt-moving member (3) capable of passing through the sewage outlet (14) and receiving dirt is provided in the groove (16); the two ends of the dirt-moving member (3) are respectively connected to the injection port (13) and the sewage outlet (14); dirt is taken out of the plate chamber (12) by moving the dirt-moving member (3) out of the plate chamber (12).

2. A flat gate valve that is easy to maintain according to claim 1, characterized in that: Lugs (31) are provided at both ends of the dirt-moving member (3), and the two lugs (31) extend into the injection port (13) and the dirt-discharging port (14) respectively. The two lugs (31) are arranged parallel to the horizontal plane, and limiting columns (17) located directly above the corresponding lugs (31) are coaxially arranged on the facing end surfaces of the two anti-leakage bolts (15). The dirt-moving member (3) is quickly moved out of the plate chamber (12) by clamping and pulling the lugs (31).

3. A flat gate valve that is easy to maintain according to claim 2, characterized in that: Two support blocks (18) are provided on the inner walls of the injection port (13) and the sewage outlet (14) for supporting the lugs (31) and supporting each other with the center lines of the corresponding lugs (31).

4. The flat gate valve that is easy to maintain according to claim 2 is characterized in that: The lug (31) located in the sewage outlet (14) is provided with a force-bearing hole (32) for the hook to draw.

5. A flat gate valve that is easy to maintain according to claim 1, 2, 3 or 4, characterized in that: A plurality of vertical rods (33) are arranged on the bottom surface of the inner cavity of the dirt moving member (3) and are located on the same wave line and distributed along the length direction of the dirt moving member (3).

6. A flat gate valve that is easy to maintain according to claim 1, 2, 3 or 4, characterized in that: The bottom surfaces on both sides of the opening of the slot (16) are arranged to be inclined relative to the horizontal plane, and the two edges of the bottom surface of the gate plate (2) parallel to the length direction of the slot (16) are provided with chamfered surfaces (21) that can fit with the bottom surfaces on both sides of the opening of the slot (16).

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