Flat gate valve convenient for pollution discharge

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, a sewage containing through groove is formed in the bottom face of the gate plate, and the two ends of the sewage containing through groove directly face the injection port and the sewage outlet respectively. And an opening of the dirt containing through groove faces the bottom surface of the inner cavity of the valve body. The problems that in the prior art, dirt discharging is difficult, 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 particularly to a flat gate valve which is convenient for sewage discharge. 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 the announcement number CN206280567U discloses a flat gate valve capable of draining sewage. The gate valve 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 function of cleaning sewage can be achieved to a certain extent, there are still some defects. First, during long-term use, the gate plate moves downward many times and exerts 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. At the same time, the sewage is pressed downward. When the water flows into the valve body, the dirt at the bottom of the gate plate will extend around it, and the dirt will easily block the injection port and the sewage outlet. Subsequently, a larger water pressure is required to inject water into the valve body, which can easily cause irreversible damage to the valve body. At the same time, the dirt at the sewage outlet cannot be washed away by sufficient water pressure, 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. Secondly, the prior art can only clean the dirt at the bottom of the valve body when the medium is in circulation, 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 scope of application is small. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a flat gate valve which is convenient for removing dirt and can perform the sewage discharge operation at any time.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flat gate valve for convenient sewage discharge, comprising a valve body and a gate plate positioned in the valve body, wherein an injection port and a sewage outlet are arranged at both ends of the bottom of the valve body, and a sewage containing groove is arranged on the bottom surface of the gate plate, with its two ends respectively facing the injection port and the sewage outlet, and the opening of the sewage containing groove faces the bottom surface of the inner cavity of the valve body.

[0006] As a further improvement of the present invention, both ends of the opposite groove walls of the sewage containing groove are provided with expansion ports for connecting the inner cavity of the sewage containing groove with the two sides of the sewage containing groove.

[0007] As a further improvement of the present invention, the groove walls facing each other on the sewage containing groove are provided with a flow-through opening located between the two expansion openings.

[0008] As a further improvement of the present invention, drainage surfaces inclined relative to the vertical plane are arranged outside the two facing groove walls of the sewage containing groove, and the two drainage surfaces are located at the ends of the sewage containing groove facing the injection port. The distance between the two drainage surfaces gradually increases along the direction in which the medium flows from the injection port to the sewage outlet, and the minimum distance between the two drainage surfaces is smaller than the diameter of the injection port.

[0009] The beneficial effects of the utility model are as follows: when the gate plate contacts the bottom of the valve body, dirt is contained in the dirt containing groove, and water flows through the injection port, the dirt containing groove and the dirt outlet in sequence to bring the dirt out of the valve body. Compared with the prior art, such a design can ensure that the dirt remains soft and has fluidity, which is conducive to the smooth entry of water into the valve body and cleaning of the dirt, and effectively improves the maintenance efficiency. Regardless of whether the gate plate contacts the bottom of the valve body, water can enter the valve body and clean the dirt, so that maintenance personnel can perform maintenance at any time, and the scope of application is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the front view of the utility model;

[0011] Figure 2 for Figure 1 Right view below middle AA with the gate moved down into position;

[0012] Figure 3 for Figure 2 Right side view after bolts are removed;

[0013] Figure 4 for Figure 2 3D exploded view of

[0014] Figure 5 for Figure 4 A three-dimensional view of the middle gate.

[0015] Figure numerals: 1, valve body; 11, injection port; 12, sewage outlet; 2, gate; 3, sewage receiving groove; 31, expansion port; 32, through-flow port; 33, drainage surface. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are indicated by the same reference numerals.

[0017] Reference Figures 1 to 5As shown, a flat gate valve for convenient sewage discharge in this embodiment includes a valve body 1 and a gate plate 2 positioned in the valve body 1, the valve body 1 includes a flow channel for medium circulation and a plate chamber whose height is lower than that of the flow channel and for the gate plate 2 to extend into, an injection port 11 and a sewage outlet 12 are arranged at both ends of the bottom of the plate chamber, the injection port 11 and the sewage outlet 12 are both threadedly connected with bolts to prevent medium leakage, the outer contour of the gate plate 2 is a rectangle, the cross section of the flow channel is a circle, 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 aforementioned prior art, a dirt-containing groove 3 extending in the width direction of the gate plate 2 is milled on the bottom surface of the gate plate 2 facing the bottom of the plate chamber, and the opening of the dirt-containing groove 3 faces the bottom surface of the inner cavity of the plate chamber. In the process of the gate plate 2 moving toward the bottom of the plate chamber, the two opposite groove walls of the dirt-containing groove 3 are inserted into the dirt at the bottom of the plate chamber and squeeze the dirt to the surrounding areas of the groove walls. The dirt is accumulated in the gap between the plate chamber and the gate plate 2 and in the inner cavity of the dirt-containing groove 3 until the opposite groove walls of the dirt-containing groove 3 touch the bottom surface of the inner cavity of the plate chamber, and the gate plate 2 moves into place. At this time, the two ends of the dirt-containing groove 3 are respectively facing the injection port 11 and the sewage outlet 12. The sewage in the plate chamber is in a relaxed state and maintains fluidity because it is not fully squeezed. During maintenance, if the gate plate 2 is not lifted upward, a receiving box is placed at the sewage outlet 12, and then the bolts at the sewage outlet 12 are removed. , the dirt in the sewage groove 3 flows through the sewage outlet 12 due to the height difference and drips into the receiving box. After the sewage flows out slowly or stops, 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 bolts at the injection port 11 are removed and a water pump or a water injection gun is installed, and the water pump or the water injection gun is started. Water enters from the injection port 11 and flushes the dirt remaining in the sewage groove 3, and then the water will carry the dirt out of the sewage outlet 12. After the dirt is cleaned, the objects installed at the injection port 11 and the sewage outlet 12 are removed and the bolts are screwed on. In the subsequent use process, the dirt stagnant between the gate plate 2 and the inner wall of the plate chamber will flow back to the bottom center of the plate chamber after the gate plate 2 moves upward, so that the dirt is controlled at a certain amount. If the gate plate 2 is lifted upward, the water can fully clean the dirt at the bottom of the plate chamber out of the valve body 1;

[0019] Compared with the existing technology, such a design can ensure that the dirt remains soft and fluid, which is conducive to the smooth entry of water into the valve body 1 and cleans the dirt, and effectively improves the maintenance efficiency; regardless of whether the gate plate 2 touches the bottom of the valve body 1, water can enter the valve body 1 and clean the dirt, so that maintenance personnel can perform maintenance at any time, and the scope of application is wider.

[0020] As a specific implementation of the improvement, when the gate plate 2 is in contact with the bottom surface of the plate chamber, the dirt in the dirt holding groove 3 remains soft, which facilitates water to flow into the dirt holding groove 3 first, resulting in only a small part of the water or no water flowing through the gap between the two ends of the dirt holding groove 3 and the inner wall of the plate chamber to wash the dirt on both sides of the dirt holding groove 3, resulting in insufficient cleaning of the dirt. In order to solve the above-mentioned problem, refer to Figure 2 , Figure 4 and Figure 5 As shown, expansion ports 31 are cut at both ends of the two groove walls facing each other of the sewage groove 3. Such a design can effectively increase the distance between the two ends of the sewage groove 3 and the inner wall of the plate chamber, increase the possibility and amount of water flowing into the two sides of the sewage groove 3, and the sewage accumulated on both sides of the sewage groove 3 flows through the expansion ports 31 and the sewage outlet 12 adjacent to the sewage outlet 12 along with the water, thereby improving the cleaning efficiency of the sewage and extending the maintenance cycle.

[0021] As a specific implementation of the improvement, when the gate plate 2 is in contact with the bottom surface of the inner cavity of the plate chamber, the dirt in the dirt holding groove 3 is cleaned faster than the dirt on both sides of the dirt holding groove 3, and the inner cavity of the dirt holding groove 3 is easy to form a water supply flow passage, resulting in subsequent water preferentially flowing through the dirt holding groove 3 and unable to effectively clean the dirt on both sides of the dirt holding groove 3. In order to solve the above-mentioned problem, refer to Figure 2 , Figure 4 and Figure 5 As shown, the groove walls facing each other in the sewage groove 3 are cut with flow openings 32 located between the two expansion openings 31. During the cleaning process, after the dirt in the sewage groove 3 at the flow openings 32 is pushed away, the dirt on both sides of the sewage groove 3 flows through the flow openings 32 and enters the sewage groove 3 under the push of water and the traction force generated by the water flow in the sewage groove 3, and is finally discharged from the valve body 1 at the sewage outlet 12. Such a design can speed up the cleaning of the dirt on both sides of the sewage groove 3 and further improve the cleaning efficiency. It is further explained that under the condition of ensuring the structural strength of the sewage groove 3, the number of flow openings 32 can be determined according to production needs.

[0022] As a specific implementation method of the improvement, refer to Figure 4 and Figure 5As shown, the two side walls of the end portion of the sewage-containing groove 3 facing the injection port 11 are cut, and drainage surfaces 33 inclined relative to the vertical plane are processed on the outer sides of the two groove walls. The distance between the two drainage surfaces 33 gradually increases along the direction in which the medium flows from the injection port 11 to the sewage outlet 12. The minimum distance between the two drainage surfaces 33 is smaller than the diameter of the injection port 11, and the spacing between the two drainage surfaces 33 and the relative plate chamber inner wall changes from large to small. During the cleaning process, water flows through the injection port 11 and is divided into three parts: left, middle and right. The left and right parts flow to the two sides of the sewage-containing groove 3 along the drainage surfaces 33 respectively, and the middle part flows through the inner cavity of the sewage-containing groove 3. The water in the left and right parts flows from a large space to a small space, which will increase the water pressure and produce a stronger flushing of the dirt. Such a design can further increase the amount of water flowing to the two sides of the sewage-containing groove 3, and at the same time speed up the cleaning speed of the dirt on both sides of the sewage-containing groove 3.

[0023] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications 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 convenient sewage discharge, comprising a valve body (1) and a gate plate (2) positioned in the valve body (1), wherein the valve body (1) is provided with an injection port (11) and a sewage outlet (12) at both ends of the bottom, and characterized in that: The bottom surface of the gate plate (2) is provided with a sewage accommodating groove (3) with two ends facing the injection port (11) and the sewage outlet (12) respectively, and the opening of the sewage accommodating groove (3) faces the bottom surface of the inner cavity of the valve body (1).

2. A flat gate valve for convenient sewage discharge according to claim 1, characterized in that: Both ends of the opposing groove walls of the sewage containing groove (3) are provided with expansion ports (31) for connecting the inner cavity of the sewage containing groove (3) with the two sides of the sewage containing groove (3).

3. A flat gate valve for convenient sewage discharge according to claim 2, characterized in that: The groove walls facing each other of the sewage containing groove (3) are each provided with a flow-through opening (32) located between the two expansion openings (31).

4. A flat gate valve for convenient sewage discharge according to claim 1, 2 or 3, characterized in that: Drainage surfaces (33) inclined relative to a vertical plane are arranged outside two groove walls facing each other of the sewage receiving groove (3); the two drainage surfaces (33) are located at the ends of the sewage receiving groove (3) facing the injection port (11); the distance between the two drainage surfaces (33) gradually increases along the direction in which the medium flows from the injection port (11) to the sewage outlet (12); and the minimum distance between the two drainage surfaces (33) is less than the diameter of the injection port (11).

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