Pipeline check valve

Abstract

The utility model discloses a pipeline check valve which comprises a valve body, the valve body is provided with a water inlet pipe and a water outlet pipe which are communicated with the interior of the valve body, the valve body is provided with a valve cover, a valve element is installed below the valve cover through a spring, the valve cover is provided with a fixing mechanism used for fixing the valve element, and the fixing mechanism comprises a threaded rod arranged on the valve cover. A movable ring is arranged on the threaded rod, a plurality of fixing rods are fixedly connected to the lower end of the movable ring, and a limiting rod penetrating through the movable ring is fixedly connected to the inner top of the valve deck. Due to the fact that the fixing mechanism is arranged, when medium pressure of a connected pipeline is too large, the threaded rod can be rotated to enable the fixing rods to move downwards to abut against the valve element, the situation that the elasticity of a spring is reduced or even fails due to the too large medium pressure is avoided, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline check valves, in particular to a pipeline check valve. Background Art

[0002] A check valve is a valve with a circular disc as its opening and closing element. It operates by its own weight and the pressure of the medium to prevent the backflow of the medium. It is an automatic valve and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The disc movement is categorized as either lift or swing.

[0003] The medium in the check valve flows in one direction, and the spring is compressed by the medium pressure under the action of the fluid pressure, and the valve disc opens. When the fluid flows in the opposite direction, the fluid pressure, the valve disc and the spring without pressure act on the valve seat to cut off the flow. The check valve is only used for pipelines with low-pressure media. When the pressure of the pipeline medium suddenly increases, the spring may be squeezed for a long time, causing the spring elasticity to decrease and stretch to make it elastic. Therefore, it is necessary to design a pipeline check valve to solve the above problem. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a pipeline check valve.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pipeline check valve includes a valve body, which is provided with an inlet pipe and an outlet pipe connected to the interior of the valve body, a valve cover is provided on the valve body, a valve core is installed under the valve cover through a spring, and a fixing mechanism for fixing the valve core is provided on the valve cover. The fixing mechanism includes a threaded rod arranged on the valve cover, a movable ring is provided on the threaded rod, a plurality of fixing rods are fixedly connected to the lower end of the movable ring, a limiting rod passing through the movable ring is fixedly connected to the top of the inner top of the valve cover, and a driving mechanism for driving the threaded rod to rotate is provided on the valve cover.

[0007] Preferably, the driving mechanism comprises a mounting bracket fixedly connected to the valve cover, and a motor is installed in the mounting bracket.

[0008] Preferably, a pressure sensor is provided on the water inlet pipe, and a controller is provided on the valve cover.

[0009] Preferably, a display is provided on the valve cover, and an indicator light is provided on the valve cover.

[0010] Preferably, the lower end of the threaded rod is rotatably connected to a fixed block, and the side wall of the fixed block is slidably connected to a fixed frame.

[0011] Preferably, an alarm is provided on the valve cover, and a plurality of the fixing rods are arranged at equal intervals.

[0012] The present invention has the following beneficial effects:

[0013] 1. This device is equipped with a fixing mechanism. When the medium pressure in the connected pipeline is too high, the threaded rod can be rotated to move the multiple fixing rods downward to press against the valve core, avoiding excessive medium pressure causing the spring elasticity to decrease or even fail, thereby extending the service life of the valve;

[0014] 2. The device is provided with a driving mechanism, which can rotate the threaded rod by starting the motor, and does not require manual rotation of the threaded rod, thereby improving the degree of automation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the pipeline check valve proposed by the utility model;

[0016] Figure 2 This is a side view of the pipeline check valve proposed by the utility model;

[0017] Figure 3 This is another side view of the pipeline check valve proposed by the utility model.

[0018] In the figure: 1 water inlet pipe, 2 valve body, 3 water outlet pipe, 4 valve cover, 5 spring, 6 valve core, 7 limit rod, 8 fixing rod, 9 moving ring, 10 pressure sensor, 11 motor, 12 threaded rod, 13 controller, 14 display, 15 indicator light, 16 alarm, 17 fixing frame, 18 fixing block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-3 , a pipeline check valve comprises a valve body 2, the valve body 2 is provided with a water inlet pipe 1 and a water outlet pipe 3 connected with the interior thereof, a valve cover 4 is provided on the valve body 2, the valve cover 4 is the valve cover 4 and the connecting seat of the check valve in the prior art, a valve core 6 is installed under the valve cover 4 through a spring 5, and as shown in the figure, a through hole for matching the valve core 6 is provided in the valve body 2, a fixing mechanism for fixing the valve core 6 is provided on the valve cover 4, and the fixing mechanism comprises a threaded rod 12 arranged on the valve cover 4, a movable ring 9 is provided on the threaded rod 12, a plurality of fixing rods 8 are fixedly connected to the lower end of the movable ring 9, and a limiting rod 7 penetrating the movable ring 9 is fixedly connected to the top of the valve cover 4.

[0021] The valve cover 4 is provided with a driving mechanism for driving the threaded rod 12 to rotate. The driving mechanism includes a mounting frame fixedly connected to the valve cover 4, and a motor 11 is installed in the mounting frame.

[0022] In the present invention, a pressure sensor 10 is provided on the water inlet pipe 1 , and a controller 13 is provided on the valve cover 4 . The controller 13 can automatically start the motor 11 according to monitoring by the pressure sensor 10 .

[0023] In the present invention, a display 14 is provided on the valve cover 4, and the display 14 can directly display the medium pressure. An indicator light 15 is provided on the valve cover 4, and a green light of the indicator light 15 indicates that the medium pressure is normal, and a red light indicates abnormality.

[0024] In the present invention, the lower end of the threaded rod 12 is rotatably connected to a fixing block 18 , and the side wall of the fixing block 18 is slidably connected to a fixing frame 17 , so that the lower end of the threaded rod 12 will not be suspended in the air.

[0025] In the present invention, an alarm 16 is provided on the valve cover 4, which can remind people of changes in medium pressure through sound and light. Multiple fixing rods 8 are arranged at equal intervals, which can more stably press the valve core.

[0026] When in use, the medium enters the valve body 2 from the water inlet pipe 1. The medium's own pressure will squeeze the spring 5 to make the valve core 6 rise, and the medium can flow into the water outlet pipe 3 through the through hole. When the medium flows back, the spring 5 has no upward lifting force and squeezes the valve core 6 downward to block the through hole to prevent backflow. When the medium pressure in the connected pipeline is too high, the threaded rod 12 can be rotated to make the movable ring 9 move downward under the limit of the limit rod 7, so that the multiple fixed rods 8 move downward to press against the valve core 6, thereby preventing the spring 5 from losing elasticity or even failing due to excessive medium pressure;

[0027] The rotation of the threaded rod 12 can be driven by starting the motor 11. The output shaft of the motor 11 drives the threaded rod 12 to rotate. The motor 11 is a stepping motor. Its output shaft is reversed, so the threaded rod 12 can be reversed. There is no need to manually rotate the threaded rod 12, thereby improving the degree of automation of the device.

[0028] The pressure in the medium pipeline can be monitored by the pressure sensor 10. When the pressure exceeds the threshold, the controller 13 can control the motor 11 to start, so that the threaded rod 12 rotates. There is no need to manually control the rotation of the threaded rod 12 based on other monitoring devices in the pipeline system, which saves a lot of time for determination and improves the practicality of the device.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and practical concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pipeline check valve, comprising a valve body (2), characterized in that: The valve body (2) is provided with a water inlet pipe (1) and a water outlet pipe (3) which are in communication with the inside of the valve body (2); a valve cover (4) is provided on the valve body (2); a valve core (6) is mounted under the valve cover (4) via a spring (5); a fixing mechanism for fixing the valve core (6) is provided on the valve cover (4); the fixing mechanism comprises a threaded rod (12) arranged on the valve cover (4); a moving ring (9) is provided on the threaded rod (12); a plurality of fixing rods (8) are fixedly connected to the lower end of the moving ring (9); a limiting rod (7) which passes through the moving ring (9) is fixedly connected to the top of the valve cover (4); and a driving mechanism for driving the threaded rod (12) to rotate is provided on the valve cover (4).

2. The pipeline check valve according to claim 1, characterized in that: The driving mechanism comprises a mounting frame fixedly connected to the valve cover (4), and a motor (11) is installed in the mounting frame.

3. The pipeline check valve according to claim 2, characterized in that: The water inlet pipe (1) is provided with a pressure sensor (10), and the valve cover (4) is provided with a controller (13).

4. The pipeline check valve according to claim 1, characterized in that: The valve cover (4) is provided with a display (14), and the valve cover (4) is provided with an indicator light (15).

5. The pipeline check valve according to claim 1, characterized in that: The lower end of the threaded rod (12) is rotatably connected to a fixing block (18), and the side wall of the fixing block (18) is slidably connected to a fixing frame (17).

6. The pipeline check valve according to claim 1, characterized in that: An alarm (16) is provided on the valve cover (4), and a plurality of fixing rods (8) are arranged at equal intervals.

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