阅读说明：本技术 一种方形止回阀 (Square check valve ) 是由 朱珑珑 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种方形止回阀,包括门扇和门框,所述门框包括固定框和门扇对接框；所述固定框通过螺栓固定在安装墙上面；所述门扇对接框的固定面焊接在所述固定框上,所述门扇对接框的对接面与其固定面的夹角为锐角；所述固定框的顶边设有若干门扇连接板,所述门扇的顶部设有若干与所述门扇连接板相匹配的转轴连接片,所述转轴连接片与所述门扇连接板通过轴销连接在一起,使得所述门扇能够绕所述轴销旋转。本方案结构简单,使用寿命长,且能够自动开启和关闭,后期维护量小。(The invention discloses a square check valve which comprises a door leaf and a door frame, wherein the door frame comprises a fixed frame and a door leaf butt joint frame; the fixing frame is fixed on the mounting wall through bolts; the fixed surface of the door leaf butt joint frame is welded on the fixed frame, and the included angle between the butt joint surface of the door leaf butt joint frame and the fixed surface of the door leaf butt joint frame is an acute angle; the top edge of the fixed frame is provided with a plurality of door leaf connecting plates, the top of the door leaf is provided with a plurality of rotating shaft connecting plates matched with the door leaf connecting plates, and the rotating shaft connecting plates are connected with the door leaf connecting plates through shaft pins, so that the door leaf can rotate around the shaft pins. This scheme simple structure, long service life, and can open and close automatically, the later maintenance volume is little.)

1. A square check valve comprises a door leaf and a door frame, and is characterized in that the door frame comprises a fixed frame and a door leaf butt joint frame; the fixing frame is fixed on the mounting wall through bolts; the door leaf butt joint frame comprises a fixed surface and a butt joint surface, the fixed surface of the door leaf butt joint frame is welded on the fixed frame, and an included angle between the butt joint surface of the door leaf butt joint frame and the fixed surface of the door leaf butt joint frame is an acute angle; the top edge of the fixed frame is provided with a plurality of door leaf connecting plates, the top of the door leaf is provided with a plurality of rotating shaft connecting plates matched with the door leaf connecting plates, and the rotating shaft connecting plates are connected with the door leaf connecting plates through shaft pins, so that the door leaf can rotate around the shaft pins.

2. A square check valve as claimed in claim 1, wherein said door leaf and said door leaf abutment are rectangular and are sized to match each other such that said door leaf panel completely covers said door leaf abutment.

3. The square check valve as claimed in claim 1, wherein a sealing groove is formed at a periphery of the inner panel of the door leaf, and a rubber sealing strip is disposed in the sealing groove.

4. A square check valve as in claim 1 wherein said inner panel of said door leaf is provided with a reinforcing grid plate.

5. A square check valve as claimed in claim 4, wherein said reinforcing grid plate comprises longitudinally and transversely staggered plates, said longitudinal plates being in the shape of an isosceles trapezoid and said transverse plates being in the shape of a rectangle.

6. A square check valve as claimed in claim 1 wherein said abutting face of said door leaf abutting frame is at an angle of 8 ° to said fixed face.

7. A square check valve as claimed in claim 1 wherein said door leaf and said door frame are made of stainless steel.

8. A square check valve as claimed in claim 1 wherein said door leaf has a lower edge that is higher than a lower edge of said door frame.

Technical Field

The invention relates to the technical field of urban pipe network drainage flood control and river channel backflow prevention, in particular to a square check valve.

Background

Along with the rapid development of urbanization in China, attention is paid to the treatment of urban rivers. In order to protect the water body of the river channel from being polluted, sewage which is not subjected to purification treatment is not allowed to be discharged into the river channel under the condition of no flooding. However, when rainstorm or flood occurs, the water level in the inner river channel continuously rises, and in order to ensure that a large amount of accumulated water is not generated in the city, the water in the inner river channel needs to be discharged to the outer river channel, so that the burden of urban water drainage management is reduced, and the antifouling cut-off effect is achieved.

In order to achieve the above-mentioned effect of managing the water level of the internal and external riverways, a shutoff valve is usually installed at the connecting channel opening of the internal and external riverways. However, the conventional shutoff valve needs to monitor and manage the water level by using a water level sensor, and open or close the shutoff valve by using an electric valve, so as to achieve an antifouling shutoff effect. However, since the equipment is placed in a wet river for a long time, the equipment is very easy to malfunction, and the installation positions are difficult to maintain, thereby causing many problems for the management of urban antifouling closure.

Disclosure of Invention

The purpose of the invention is: the utility model provides a square check valve, it is installed in flood control river course or the cistern in city, and under torrential rain or the flood condition, this check valve can be opened automatically under the condition that does not need external force, and when inside and outside water pressure is balanced, self-closing again need not external power and supports to reach the antifouling effect of damming.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a square check valve comprises a door leaf and a door frame, wherein the door frame comprises a fixed frame and a door leaf butt joint frame; the fixing frame is fixed on the mounting wall through bolts; the door leaf butt joint frame comprises a fixed surface and a butt joint surface, the fixed surface of the door leaf butt joint frame is welded on the fixed frame, and an included angle between the butt joint surface of the door leaf butt joint frame and the fixed surface of the door leaf butt joint frame is an acute angle; the top edge of the fixed frame is provided with a plurality of door leaf connecting plates, the top of the door leaf is provided with a plurality of rotating shaft connecting plates matched with the door leaf connecting plates, and the rotating shaft connecting plates are connected with the door leaf connecting plates through shaft pins, so that the door leaf can rotate around the shaft pins.

As a preferred technical scheme, the door leaf and the door leaf butt joint frame are rectangular and are matched in size, so that the door leaf butt joint frame can be completely covered by the panel of the door leaf.

As the preferred technical scheme, the periphery of the inner side panel of the door leaf is provided with a sealing groove, and a rubber sealing strip is arranged in the sealing groove.

As a preferred technical scheme, a reinforced grating plate is arranged on an inner side panel of the door leaf.

As a preferred technical scheme, the reinforcing grid plate comprises longitudinal plates and transverse plates which are criss-cross, the longitudinal plates are isosceles trapezoids, and the transverse plates are rectangles.

As a preferred technical scheme, the included angle between the butting surface of the door leaf butting frame and the fixing surface of the door leaf butting frame is 8 degrees.

As a preferred technical scheme, the door leaf and the door frame are both made of stainless steel materials.

Preferably, the bottom edge of the door leaf is higher than the bottom edge of the door frame.

The invention has the beneficial effects that: the main body of the scheme is made of stainless steel materials, so that the corrosion resistance is super strong, and the service life of the product is greatly ensured; the scheme has simple structure, can be automatically opened and closed, and has smaller maintenance workload; in addition, the contained angle design of door leaf makes even if open when intraductal water level is higher than the river water level by a small margin, can effectively close when intraductal water level is less than opening the water level, and the applied environment requirement is low, but wide use.

Drawings

Fig. 1 is a schematic side view of the present invention.

Fig. 2 is a schematic view of the inclination angle of the butt joint surface of the butt joint frame of the door leaf.

Fig. 3 is a schematic view of a connection structure between a door leaf and a door frame.

Fig. 4 is a schematic view of the inner side of the door leaf.

In the figure: 1-door frame, 2-door leaf, 11-fixed frame, 12-door leaf butt joint frame, 13-door leaf connecting plate, 21-rotating shaft connecting piece and 22-rubber sealing strip.

Detailed Description

The following is combined with the attached drawings. The present invention is further explained.

One embodiment of the invention is shown in fig. 1, and comprises a door frame 1 and a door leaf 2, wherein the door frame 1 comprises a fixing frame 11 and a door leaf butt-joint frame 12, the fixing frame 11 is fixed on an installation wall surface through a bolt, the structure of the door leaf butt-joint frame 12 is shown in fig. 2, the door leaf butt-joint frame comprises a fixing surface and a butt-joint surface, the fixing surface is vertically arranged, the butt-joint surface forms a certain included angle with the fixing surface, and when the included angle is set to be 8 degrees, the door leaf butt-joint frame can be opened even when the water level in a.

As shown in fig. 3, a plurality of door connecting plates 13 are provided on the top edge of the fixed frame 11 of the door frame 1. The top of the door leaf 2 is provided with a plurality of rotating shaft connecting pieces 21 matched with the door leaf connecting plates 13, and the rotating shaft connecting pieces 21 are connected with the door leaf connecting plates 13 through shaft pins, so that the door leaf 2 can rotate around the shaft pins.

The door leaf 2 and the door leaf docking frame 12 are sized to match each other such that the panel of the door leaf 2 can completely cover the opening of the door leaf docking frame 12.

As shown in fig. 4, a seal groove is provided around the inner panel of the door 2, and a rubber seal 22 is provided in the seal groove. A reinforcing grid plate 23 is provided on the inner panel of the door 2.

The reinforcing grid plate 23 includes longitudinal plates and transverse plates which are criss-cross, the longitudinal plates are isosceles trapezoids, and the transverse plates are rectangles.

In addition, the door leaf 2 and the door frame 1 are both made of stainless steel material.

In order to prevent sediment from blocking the opening of the door leaf 2, the bottom edge of the door leaf 2 is higher than the bottom edge of the door frame 1.

The working principle of the scheme is as follows: when river course water level was less than outer river course, outside pressure was higher than inside, and square check valve is closed, and interior river course can not be gone into to outside rivers, plays the valve effect of ending. Under the condition of heavy rain or flood, the inland river is automatically opened for drainage without external force, and is automatically closed when the internal pressure and the external pressure are balanced, so that antifouling closure is achieved.

The basic principles and the main features of the solution and the advantages of the solution have been shown and described above. It will be understood by those skilled in the art that the present solution is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principles of the solution, but that various changes and modifications may be made to the solution without departing from the spirit and scope of the solution, and these changes and modifications are intended to be within the scope of the claimed solution. The scope of the present solution is defined by the appended claims and equivalents thereof.