Check valve with sealing waterline

Abstract

The utility model discloses a check valve with a sealing waterline, and particularly relates to the technical field of check valves, the check valve comprises a valve body, the bottom end of the valve body is fixedly communicated with a water inlet pipe, the outer side of the valve body is fixedly communicated with a water outlet pipe, the bottom of the valve body is fixedly provided with a valve seat, a sliding seat and a top plate are respectively connected in the valve body in a sliding mode, and a sealing waterline is arranged on the top plate. When in use, the valve is easy to operate, the sealing performance and the stability of the device can be improved through a sealing waterline, meanwhile, finer and continuous elastic force adjustment can be achieved, the elastic force can be adjusted more stably, the sealing waterline can be adjusted more stably, the sealing waterline can be adjusted more stably, the sealing waterline can be adjusted more stably, and the service life of the valve is prolonged. And when the threaded rod needs to be disassembled and maintained, the valve body does not need to be opened, and therefore the possibility that parts in the valve body are damaged due to disassembly is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field more specifically, the utility model relates to a kind of check valve with sealing water line. BACKGROUND

[0002] Check valve is a kind of automatic valve, mainly used to prevent fluid backflow. It usually includes valve body, valve seat, valve clapper and other components, check valve is widely used in various pipeline systems, such as water supply and drainage system, chemical pipeline, oil transportation pipeline, etc., can effectively protect equipment from damage caused by fluid backflow, ensure system safe and stable operation.

[0003] Check valve is usually reset and opened by spring, the existing check valve adopts screw adjusting mechanism to change the spring force in design, to adapt to the case that the pressure, flow rate and other working conditions of fluid are quite different in different pipeline systems, when the number of screw rotation is more, there is a certain amount of wear, the threaded rod needs to be replaced to avoid affecting the accuracy of adjustment, but since the internal space of valve body is limited, when replacing threaded rod, the threaded rod needs to be installed after the multiple components of check valve are disassembled, so that the damage risk of valve body is higher. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiment of the utility model provides a check valve with sealing water line, and the technical problems to be solved by the utility model are: since the internal space of valve body is limited, when replacing threaded rod, the threaded rod needs to be installed after the multiple components of check valve are disassembled, so that the damage risk of valve body is higher.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A check valve with sealing water line, comprising a valve body, the bottom end of the valve body is fixed and communicated with a water inlet pipe, the outer side of the valve body is fixed and communicated with a water outlet pipe, the bottom of the valve body is fixedly installed with a valve seat, the valve body is respectively slidably connected with a sliding seat and a top plate, the sliding seat and the top plate are jointly installed with a spring, the lower end surface of the top plate is fixedly installed with a valve stem, one end of the valve stem penetrates through the valve body and is fixedly installed with a valve clapper, the lower end surface of the valve clapper and the upper end surface of the valve seat are both provided with a plurality of annular water lines, the valve body is slidably connected with a second oil seal piston, the bottom surface of the second oil seal piston is fixedly connected with the top surface of the sliding seat through a connecting rod, the outer side of the valve body is fixedly installed with a gas injection tank, the gas injection tank is provided with a gas injection mechanism, and the gas injection mechanism is communicated with the valve body.

[0007] As Figures 1-4The embodiment is specific as follows: a plurality of annular water lines are arranged on the valve seat and the valve disc, so that the liquid in the annular water lines is extruded to fill the small gap between the valve seat and the valve disc, thereby improving the sealing performance and stability of the device; the second oil seal piston, the air injection mechanism and the air injection tank are arranged, so that the air injection mechanism injects air into the valve body, the second oil seal piston drives the sliding block to slide, the spring force is adjusted, the air injection mechanism can realize more fine and continuous spring force adjustment, the gas has good compressibility, compared with the traditional mechanical adjustment mode, the air injection can more sensitively change the piston position and the spring stress state, and the air injection mechanism is located outside the valve body, so that when the air injection mechanism needs to be disassembled and maintained, the valve body does not need to be disassembled, thereby reducing the possibility that the internal parts of the valve body are damaged due to disassembly.

[0008] In a preferred embodiment, the air injection mechanism comprises a threaded rod, and the threaded rod is threadedly connected to the top surface of the air injection tank; one end of the threaded rod is rotationally connected with a first oil seal piston, and the first oil seal piston is slidingly connected in the air injection tank; the outside of the air injection tank is fixedly connected with a communication pipe in communication, and the other end of the communication pipe is in communication with the valve body.

[0009] In a preferred embodiment, the bottom end of the valve body is fixedly installed with a sealing seat, and the valve rod is slidingly connected with the sealing seat.

[0010] In a preferred embodiment, one end of the water inlet pipe and the water outlet pipe is fixedly installed with a connecting flange; the communication height of the air injection tank and the valve body is greater than the installation height of the valve seat.

[0011] In a preferred embodiment, the end of the threaded rod, away from the first oil seal piston, is fixedly installed with a knob.

[0012] In a preferred embodiment, the communication position of the communication pipe in the air injection tank is between the first oil seal piston and the bottom wall of the air injection tank, and the communication position of the communication pipe on the valve body is between the second oil seal piston and the top wall of the valve body.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. The threaded rod, the air injection tank, the first oil seal piston and the second oil seal piston are arranged, so that the air in the air injection tank is injected into the valve body through the first oil seal piston by rotating the threaded rod, the sliding of the second oil seal piston controls the sliding of the sliding block 17, thereby controlling the spring force of the spring acting on the valve disc, the air injection mechanism can realize more fine and continuous spring force adjustment, the air injection tank is outside the valve body, when the threaded rod needs to be disassembled and maintained, the valve body does not need to be opened, thereby reducing the possibility that the internal parts of the valve body are damaged due to disassembly.

[0015] 2、The utility model discloses a valve clack, valve seat, annular water line etc. device is set up, realized through the valve clack and the outside of valve seat and set up multiple annular water lines, and liquid fills multiple annular water lines, and then when the valve clack and valve seat extrude, the liquid in annular water line can fill the gap of valve clack and valve seat, thereby the purpose of improving the sealing property and stability of device.

[0016] In conclusion, the utility model discloses a simple operation in use, can improve the sealing property and stability of device through sealed water line, and can realize more delicate and continuous elastic adjustment simultaneously, and when needing to disassemble and maintain threaded rod, need not open valve body, thereby reducing the possibility of damage of valve body internal parts due to disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure schematic diagram of check valve with sealed water line is provided for the utility model;

[0018] Figure 2 The valve seat installation structure schematic diagram of check valve with sealed water line is provided for the utility model;

[0019] Figure 3 The gas injection mechanism structure schematic diagram of check valve with sealed water line is provided for the utility model;

[0020] Figure 4 The valve body cross section structure schematic diagram of check valve with sealed water line is provided for the utility model.

[0021] In the drawing: 1 valve body, 2 water inlet pipe, 3 water outlet pipe, 4 connecting flange, 5 gas injection tank, 6 communication pipe, 7 valve seat, 8 valve rod, 9 valve clack, 10 threaded rod, 11 knob, 12 first oil seal piston, 13 annular water line, 14 sealing seat, 15 top plate, 16 spring, 17 slide, 18 second oil seal piston. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] Reference Figures 1-4A check valve with a sealed water line includes a valve body 1, an inlet pipe 2 fixed to and connected to the bottom end of the valve body 1, an outlet pipe 3 fixed to and connected to the outside of the valve body 1, a valve seat 7 fixedly installed at the bottom of the valve body 1, a slide seat 17 and a top plate 15 slidably connected inside the valve body 1, a spring 16 installed between the slide seat 17 and the top plate 15, a valve stem 8 fixedly installed on the lower end face of the top plate 15, one end of the valve stem 8 passing through the valve body 1 and a valve disc 9 fixedly installed thereon, multiple annular water lines 13 are opened on the lower end face of the valve disc 9 and the upper end face of the valve seat 7, a second oil seal piston 18 slidably connected inside the valve body 1, the bottom surface of the second oil seal piston 18 being fixedly connected to the top surface of the slide seat 17 through a connecting rod, and an air injection box 5 fixedly installed on the outside of the valve body 1, the air injection box 5 being provided with an air injection mechanism, and the air injection mechanism being connected to the valve body 1.

[0024] like Figures 1-4 As shown, the specific implementation method is as follows: Multiple annular water lines 13 are provided on both the valve seat 7 and the valve disc 9, causing the liquid within the annular water lines 13 to be squeezed and fill the tiny gap between the valve seat 7 and the valve disc 9, thereby improving the sealing performance and stability of the device. Simultaneously, through the second oil seal piston 18, the air injection mechanism, and the air injection box 5, the air injection mechanism injects air into the valve body 1, causing the slide seat 17 to slide via the second oil seal piston 18, thereby adjusting the elastic force of the spring 16. Air injection allows for more precise and continuous elastic force adjustment. Due to the good compressibility of gas, compared to traditional mechanical adjustment methods, air injection can more sensitively change the piston position and the force state of the spring 16. Furthermore, the air injection mechanism is located on the outside of the valve body 1, so when the air injection mechanism needs to be disassembled for maintenance, it is not necessary to disassemble the valve body 1, thus reducing the possibility of damage to internal parts of the valve body 1 due to disassembly.

[0025] The air injection mechanism includes a threaded rod 10, which is threadedly connected to the top surface of the air injection box 5. One end of the threaded rod 10 is rotatably connected to a first oil seal piston 12, which is slidably connected inside the air injection box 5. The outside of the air injection box 5 is fixed and connected to a connecting pipe 6, and the other end of the connecting pipe 6 is connected to the valve body 1. The rotation of the threaded rod 10 can drive the threaded rod 10 to slide inside the air injection box 5, thereby pushing the first oil seal piston 12 to slide and pushing the air inside the air injection box 5 into the valve body 1 through the connecting pipe 6.

[0026] A sealing seat 14 is fixedly installed at the bottom of the valve body 1, and the valve stem 8 is slidably connected to the sealing seat 14.

[0027] Both the inlet pipe 2 and the outlet pipe 3 are fixedly installed with connecting flanges 4. The connection height between the air injection box 5 and the valve body 1 is greater than the installation height of the valve seat 7. The connecting flanges 4 facilitate connection with external pipelines.

[0028] The threaded rod 10 is fixedly installed with a knob 11 at one end away from the first oil seal piston 12.

[0029] The communication pipe 6 is located between the first oil seal piston 12 and the bottom wall of the air injection tank 5 at the communication position of the air injection tank 5, and is located between the second oil seal piston 18 and the top wall of the valve body 1 at the communication position of the valve body 1.

[0030] When the spring 16 in the valve body 1 needs to be increased in elasticity, the threaded rod 10 is rotated by rotating the knob 11, so that the first oil seal piston 12 slides in the air injection tank 5, pushes the air in the air injection tank 5 into the valve body 1 through the communication pipe 6, and injects the air between the second oil seal piston 18 and the top wall of the valve body 1, so as to push the second oil seal piston 18 to slide downward, and then the spring 16 is extruded through the sliding seat 17, so as to increase the extrusion force between the valve disc 9 and the valve seat 7, so that the water source in the water inlet pipe 2 needs a larger pressure to make the valve disc 9 open into the water outlet pipe 3, and reverse rotation of the knob 11 can reduce the elasticity of the spring 16, so that the water source in the water inlet pipe 2 can make the valve disc 9 open into the water outlet pipe 3 with smaller pressure.

[0031] Meanwhile, the valve disc 9 and the valve seat 7 are both provided with a plurality of annular water lines 13, and the liquid is filled in the annular water lines 13, so that when the valve disc 9 and the valve seat 7 are extruded, the liquid in the annular water lines 13 can fill the gap between the valve disc 9 and the valve seat 7, so as to improve the sealing performance and stability of the device.

[0032] The above only describes some exemplary embodiments of the utility model by way of illustration, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection of the utility model claims.

Claims

1. A check valve with a sealed water line, comprising a valve body (1), characterized in that: The bottom end of the valve body (1) is fixedly connected with and communicates with a water inlet pipe (2), the outer side of the valve body (1) is fixedly connected with and communicates with a water outlet pipe (3), the bottom of the valve body (1) is fixedly connected with a valve seat (7), the valve body (1) is slidably connected with a sliding seat (17) and a top plate (15) respectively, the sliding seat (17) and the top plate (15) are jointly connected with a spring (16), the lower end surface of the top plate (15) is fixedly connected with a valve rod (8), one end of the valve rod (8) penetrates through the valve body (1) and is fixedly connected with a valve clack (9), the lower end surface of the valve clack (9) and the upper end surface of the valve seat (7) are both provided with a plurality of annular water lines (13), the valve body (1) is slidably connected with a second oil seal piston (18), the bottom surface of the second oil seal piston (18) is fixedly connected with the top surface of the sliding seat (17) through a connecting rod, the outer side of the valve body (1) is fixedly connected with a gas injection tank (5), the gas injection tank (5) is provided with a gas injection mechanism, and the gas injection mechanism communicates with the valve body (1).

2. A check valve with a sealed water line according to claim 1, characterized in that: The gas injection mechanism comprises a threaded rod (10), the threaded rod (10) is threadedly connected to the top surface of the gas injection tank (5), one end of the threaded rod (10) is rotatably connected with a first oil seal piston (12), and the first oil seal piston (12) is slidably connected in the gas injection tank (5), the outer side of the gas injection tank (5) is fixedly connected with and communicates with a communication pipe (6), and the other end of the communication pipe (6) communicates with the valve body (1).

3. A check valve with a sealed water line according to claim 2, characterized in that: The bottom end of the valve body (1) is fixedly connected with a sealing seat (14), and the valve rod (8) and the sealing seat (14) are slidably connected.

4. A check valve with a sealed water line according to claim 3, characterized in that: One end of the water inlet pipe (2) and the water outlet pipe (3) is fixedly connected with a connecting flange (4), and the communication height of the gas injection tank (5) and the valve body (1) is greater than the installation height of the valve seat (7).

5. A check valve with a sealed water line according to claim 4, characterized in that: The end of the threaded rod (10) away from the first oil seal piston (12) is fixedly connected with a knob (11).

6. A check valve with a sealed water line according to claim 5, characterized in that: The communication pipe (6) is located between the first oil seal piston (12) and the bottom wall of the gas injection tank (5) at the communication position of the gas injection tank (5), and the communication pipe (6) is located between the second oil seal piston (18) and the top wall of the valve body (1) at the communication position of the valve body (1).

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