Performance detection device for flap valve type check valve

Abstract

The utility model relates to a flap valve type check valve performance detection device which comprises a water tank, a partition plate is fixed inside the water tank and divides the inside of the water tank into two areas, a flap valve type check valve is installed on the partition plate, two emptying pipes are arranged at the bottom of the water tank, and the two emptying pipes are communicated with the corresponding areas in the water tank respectively. The two sides of the water tank are fixedly communicated with L-shaped overflow pipes respectively. An inner water flow is simulated in a left area and an outer water flow is simulated in a right area which are separated by a partition plate in a water tank, the position height of the top of a hose is adjusted, water is slowly injected into a water tank in the left area, the water level change is measured from submerging the bottom of a flap valve type check valve, water is continuously injected until the water level reaches 20 cm, and the opening condition of the flap valve type check valve is observed. If the flap valve type check valve is opened, the water level depth at the moment is rapidly recorded, after the flap valve type check valve is opened, water is continuously injected to the top of the left water tank, and the opening and closing conditions of the flap valve type check valve are observed during the period.

Description

Technical Field

[0001] The utility model relates to a check valve performance detection technology, in particular to a flap-type check valve performance detection device. Background Art

[0002] The flap-gate check valve is installed at the outlet of the drainage pipe near the design water level of the main canal. It is a valve that automatically opens and closes by relying on the flow pressure of the medium itself to prevent the medium from flowing back. When the water level inside the flap-gate check valve is 20cm higher than the water level outside the valve, the flap-gate check valve opens to drain water outside the valve; when the water level outside the flap-gate check valve is higher than the water level inside the valve, the flap-gate check valve closes to achieve the effect of overflow and check.

[0003] The structure of the flap-type check valve should have sufficient strength, rigidity and stability, and meet the following requirements: the opening head of the flap-type check valve should be 20cm; when the water level fluctuation outside the flap-type check valve is less than 20cm, it can remain in the closed state; the flap-type check valve can open and close automatically without any manual operation; the backflow prevention requirements of the flap-type check valve: it should be within the range of 0~0.1MPa of the water pressure outside the valve, and it should ensure reverse leakage and deformation; the water pressure resistance inside the flap-type check valve: 0~0.1MPa.

[0004] Currently, there is a lack of specific testing devices for testing the performance of the diaphragm-type check valve, which makes it inconvenient to test the performance of the diaphragm-type check valve. Utility Model Content

[0005] The purpose of the utility model is to provide a flap door type check valve performance detection device for solving the problem that there is a lack of a specific detection device for flap door type check valve performance detection, which makes it inconvenient to detect the performance of the flap door type check valve.

[0006] In order to solve the above problems, the utility model provides a flap-gate type check valve performance detection device, including a water tank, a partition is fixed inside the water tank, the partition divides the inside of the water tank into two areas, a flap-gate type check valve is installed on the partition, two drain pipes are provided at the bottom of the water tank, the two drain pipes are respectively connected to the corresponding areas in the water tank, L-shaped overflow pipes are fixedly connected on both sides of the water tank, and a retractable hose is fixedly connected at the free end of the overflow pipe. A stepped circular groove is provided on the partition, and a stepped plug ring is slidably connected in the circular groove. The stepped surface of the plug ring conflicts with the stepped surface on the partition, and a positioning ring is connected to the outer side of the flap-gate type check valve by bolts.

[0007] The performance detection device for the flap-type check valve provided by the utility model also has the following technical features:

[0008] Furthermore, two water inlet pipes are provided on the top of the water tank, and a cock is threadedly connected to the inner surface of the drain pipe.

[0009] Furthermore, one end of the insert ring passing through the partition is threadedly connected to a threaded sleeve, and a positioning bolt is threadedly connected to the threaded sleeve, and the free end of the positioning bolt can contact the surface of the insert ring.

[0010] Furthermore, the circular groove is connected to a limiting groove, and a limiting block is fixed on the inserting ring, and the limiting block can be inserted into the corresponding limiting groove.

[0011] Furthermore, scales are respectively provided in the two areas of the water tank.

[0012] Furthermore, vertical frames are fixed on both sides of the water tank, a slider is slidably connected in the vertical frame, a connecting rod is fixed on one side of the slider, a collar is fixed on the free end of the connecting rod, the collar is fixedly installed on the free end of the hose, a fixing bolt is threadedly connected on the slider, and the free end of the fixing bolt can interfere with the vertical frame.

[0013] The utility model has the following beneficial effects: by simulating the internal water flow in the left area separated by the partition in the water tank, simulating the external water flow in the right area, and by adjusting the position height of the top of the hose, water is slowly poured into the water tank in the left area, and the water level change is measured from the bottom of the flap door type check valve is submerged, and water is continuously poured until the water level reaches 20 cm, and the opening of the flap door type check valve is observed. If the flap door type check valve is opened, the water level depth at this time is quickly recorded. After the flap door type check valve is opened, water is continuously poured to the top of the left water tank, and the opening and closing of the flap door type check valve is observed during the period, and the water level depth value is recorded in real time, so that the device is convenient for testing the performance of the flap door type check valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a structural diagram of a partition and a flap-type check valve according to an embodiment of the present utility model;

[0016] Figure 3 This is a front cutaway view of an embodiment of the present utility model;

[0017] Figure 4 A three-dimensional diagram of a flap-type check valve according to an embodiment of the present invention;

[0018] Figure 5 For the embodiment of the utility model Figure 3 Schematic diagram of the structure enlarged at point A. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0020] like Figures 1 to 5 In the embodiment of the flap-type check valve performance detection device of the utility model shown, the flap-type check valve performance detection device includes a water tank 1, a partition 2 is fixed inside the water tank 1, the partition 2 divides the inside of the water tank 1 into two areas, a flap-type check valve 3 is installed on the partition 2, two drain pipes 4 are provided at the bottom of the water tank 1, the two drain pipes 4 are respectively connected to the corresponding areas in the water tank 1, and L-shaped overflow pipes 5 are fixedly connected on both sides of the water tank 1, and a retractable hose 6 is fixedly connected to the free end of the overflow pipe 5, a stepped circular groove is provided on the partition 2, and a stepped plug ring 7 is slidably connected in the circular groove, the stepped surface of the plug ring 7 conflicts with the stepped surface on the partition 2, and one side of the plug ring 7 is connected with a positioning bolt. Ring 8, the positioning ring 8 is fixedly connected to the outer side of the flap-type check valve 3. By simulating the internal water flow in the left area separated by the partition 2 in the water tank 1 and simulating the external water flow in the right area, by adjusting the position height of the top of the hose 6, water is slowly poured into the water tank in the left area, and the water level change is measured from the bottom of the flap-type check valve 3 submerged. Water is continuously poured until the water level reaches 20 cm, and the opening status of the flap-type check valve 3 is observed. If the flap-type check valve 3 is opened, the water level depth at this time is quickly recorded. After the flap-type check valve 3 is opened, water is continuously poured to the top of the left water tank. During this period, the opening and closing status of the flap-type check valve 3 is observed, and the water level depth value is recorded in real time, so that the device is convenient for performance testing of the flap-type check valve 3.

[0021] In one embodiment of the present application, two water inlet pipes 9 are provided on the top of the water tank 1, and the drain pipe 4 is internally threaded with a stopcock. The two water inlet pipes 9 are used to inject water into the two areas of the water tank 1 respectively, and the two drain pipes 4 are used to drain water from the two areas of the water tank 1.

[0022] In one embodiment of the present application, one end of the insert ring 7 passing through the partition 2 is threadedly connected to a screw sleeve 10, and a positioning bolt 11 is threadedly connected to the screw sleeve 10. The free end of the positioning bolt 11 can be in contact with the surface of the insert ring 7. The positioning bolt 11 is rotated to separate the positioning bolt 11 from the insert ring 7. By rotating the screw sleeve 10, the screw sleeve 10 and the insert ring 7 are separated, thereby facilitating the removal of the insert ring 7 from the partition 2, thereby facilitating the installation or disassembly of the flap check valve 3 and the partition 2.

[0023] In one embodiment of the present application, the circular groove is connected to a limiting groove, and a limiting block 12 is fixed on the insert ring 7. The limiting block 12 can be inserted into the corresponding limiting groove. By inserting the limiting block 12 into the corresponding limiting groove, the rotation of the insert ring 7 is facilitated.

[0024] In one embodiment of the present application, scales 13 are respectively provided in two areas of the water tank 1 , and the scales 13 are used to facilitate recording of water levels.

[0025] In one embodiment of the present application, vertical frames 14 are fixed on both sides of the water tank 1, and a slider 15 is slidably connected in the vertical frame 14. A connecting rod 16 is fixed to one side of the slider 15, and a collar 17 is fixed to the free end of the connecting rod 16. The collar 17 is fixedly installed on the free end of the hose 6. A fixing bolt 18 is threadedly connected to the slider 15, and the free end of the fixing bolt 18 can contact the vertical frame 14, so as to facilitate the adjustment of the height position of the collar 17, and then facilitate the adjustment of the height position of the top of the hose 6, so as to facilitate the adjustment of the overflow height, and detect and control the water pressure of the water flow in the water tank in the left and right areas of the flap check valve 3.

[0026] When the utility model is in use, the flap-type check valve 3 opens the water head 20cm detection scheme:

[0027] In order to ensure that the flap check valve 3 automatically opens after the difference in water head between the inside and outside of the regulating check valve is 20 cm, the detection scheme is set as follows: by simulating the internal water flow in the left area separated by the partition 2 in the water tank 1, and simulating the external water flow in the right area, by adjusting the position height of the top of the hose 6, slowly pouring water into the water tank in the left area, measuring the water level change from the bottom of the flap check valve 3 submerged, and continuously pouring water until the water level reaches 20 cm, observing the opening of the flap check valve 3. If the flap check valve 3 is opened, quickly record the water level depth at this time. After the flap check valve 3 is opened, continue to pour water to the top of the left water tank, observe the opening and closing of the flap check valve 3 during this period, and record the water level depth value in real time;

[0028] In the case where there is water flowing in the water tank in the left area of ​​the water tank 1 and there is water flowing in the water tank in the right area of ​​the water tank 1, when the water tank in the left area is filled with water, can the flap gate type check valve 3 open naturally under a water head difference of 20cm? The detection scheme is set as follows: only fill the water tank in the left area with water, and after the flap gate type check valve 3 is opened, water flows to the water tank in the right area, and slowly there is water on both sides of the flap gate type check valve 3. At this time, because the water head difference is not 20cm, the flap gate type check valve 3 is reclosed under the tension of the spring. At this time, the water tank in the left area continues to be filled with water. When the water level difference between the left and right sides is observed to be 20cm, check whether the flap gate type check valve 3 is opened again. The moment the flap gate type check valve 3 opens, record the water level difference between the two sides of the tank at this time;

[0029] In the case where there is water flowing in the left-side sink of the water tank 1 and water flowing in the right-side sink of the water tank 1, test whether the flap-gate check valve 3 can open naturally under a water head of 20 cm when the inside and outside of the flap-gate check valve 3 are full of water and the left-side sink is filled with water. The test plan is set as follows: only fill water on the left side, and after the flap-gate check valve 3 is opened, water flows to the right sink, and slowly water is added to both sides of the valve, and water is continuously added until the top of the flap-gate check valve 3 is submerged; after the water levels of the left and right sinks are equal, water is continuously added to the left side, and when the water level difference between the left and right sinks is 20 cm, observe whether the flap-gate check valve 3 is opened. If it is opened, immediately record the water level difference between the two sides of the sink at this time;

[0030] By testing the flap-type check valve 3 under these three modes when the water head is 20 cm, whether the flap-type check valve 3 opens normally, and automatically closes when it is insufficient, and whether the testing requirements are met.

[0031] Check whether the flap-gate check valve 3 can prevent backflow when there is no water flow in the water tank in the left area and the water tank in the right area is full of water. The specific method is: only fill the water tank in the right area with water until it is full, and observe whether the flap-gate check valve 3 on the left side is backflowing.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A flap-type check valve performance detection device, comprising a water tank (1), characterized in that: A partition (2) is fixed inside the water tank (1), and the partition (2) divides the inside of the water tank (1) into two areas. A flap-type check valve (3) is installed on the partition (2). Two drain pipes (4) are provided at the bottom of the water tank (1), and the two drain pipes (4) are respectively connected to the corresponding areas inside the water tank (1). L-shaped overflow pipes (5) are fixedly connected on both sides of the water tank (1), and the free end of the overflow pipe (5) is fixedly connected to a retractable hose (6). A stepped circular groove is provided on the partition (2), and a stepped plug ring (7) is slidably connected in the circular groove. The stepped surface of the plug ring (7) contacts the stepped surface on the partition (2). A positioning ring (8) is connected to one side of the plug ring (7) by bolts, and the positioning ring (8) is fixedly connected to the outer side of the flap-type check valve (3).

2. The flap-type check valve performance detection device according to claim 1, characterized in that: Two water inlet pipes (9) are provided on the top of the water tank (1), and a stopcock is connected to the inner thread of the drain pipe (4).

3. The flap-type check valve performance detection device according to claim 1, characterized in that: One end of the insert ring (7) passing through the partition (2) is threadedly connected to a screw sleeve (10), and a positioning bolt (11) is threadedly connected to the screw sleeve (10). The free end of the positioning bolt (11) can contact the surface of the insert ring (7).

4. The flap-type check valve performance detection device according to claim 1, characterized in that: The circular groove is connected to the limiting groove, and the limiting block (12) is fixed on the inserting ring (7), and the limiting block (12) can be inserted into the corresponding limiting groove.

5. The flap-type check valve performance detection device according to claim 1, characterized in that: Scales (13) are respectively provided in two areas of the water tank (1).

6. The flap-type check valve performance detection device according to claim 1, characterized in that: Mullions (14) are fixed on both sides of the water tank (1), a slider (15) is slidably connected in the mullion (14), a connecting rod (16) is fixed on one side of the slider (15), a collar (17) is fixed to the free end of the connecting rod (16), and the collar (17) is fixedly mounted on the free end of the hose (6), a fixing bolt (18) is threadedly connected to the slider (15), and the free end of the fixing bolt (18) can be in contact with the mullion (14).

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