Swing check valve with sealing element convenient to replace

Abstract

The utility model discloses a swing check valve convenient to replace a sealing element, which relates to the technical field of valves, and comprises a valve body, the valve body is provided with a medium channel, a valve seat is arranged in the medium channel, a valve clack and a rocker arm are arranged in the valve body, a valve cover is arranged on the valve body, the lower end of the valve cover is connected with a hanging bolt through threads, and the lower end of the hanging bolt is connected with a nut. A hanging bolt is arranged on the valve seat, a pin shaft is arranged on the hanging bolt, one end of the rocker arm is hinged to the pin shaft, an outer bolt and an inner bolt are arranged on the two sides of the valve clack respectively, the valve clack is fixed to the free end of the rocker arm through the outer bolt, a sealing ring is arranged on the valve clack, the sealing ring can be in sealing fit with the valve seat, and the sealing ring is detachably connected with the valve clack through the inner bolt. The sealing ring can be independently replaced after being abraded, cost is low, replacement is convenient, and the service life of the valve is long.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a swing check valve with convenient replacement of sealing parts. Background Art

[0002] The swing check valve is also called a one-way valve or a non-return valve. Its function is to prevent the medium in the pipeline from flowing back. The swing check valve is generally installed horizontally in the pipeline. The valve disc inside the existing swing check valve will contact the valve seat due to continuous opening and closing during long-term use, which will cause wear and tear, and then lead to a decrease in the sealing of the valve body. In order to ensure the normal operation of the pipeline, the entire check valve needs to be replaced, which is costly. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a swing check valve which is convenient for replacing a sealing member.

[0004] The technical solution provided by the utility model is:

[0005] A swing check valve that is easy to replace seals, comprises a valve body, the valve body is provided with a medium channel, the medium channel is provided with a valve seat, the valve body is provided with a valve disc and a rocker arm, the valve body is provided with a valve cover, the lower end of the valve cover is connected with a hanging bolt through a thread, the hanging bolt is provided with a pin, one end of the rocker arm is hinged to the pin, outer bolts and inner bolts are respectively provided on both sides of the valve disc, the valve disc is fixed to the free end of the rocker arm through the outer bolts, a sealing ring is provided on the valve disc, the sealing ring can form a sealing fit with the valve seat, and the sealing ring is detachably connected to the valve disc through the inner bolt.

[0006] The valve seat is detachably connected to the valve body via threads.

[0007] The valve flap is provided with a mounting groove, and the mounting groove is matched with the sealing ring.

[0008] A plurality of positioning protrusions are arranged in the installation groove, and the sealing ring is provided with grooves matched with the positioning protrusions.

[0009] The outer side of the medium channel is provided with a thread for conveniently connecting a pipeline.

[0010] The valve cover is detachably connected to the valve body via bolts.

[0011] A sealing gasket is arranged between the valve cover and the valve body.

[0012] A limiting inclined surface is arranged in the medium channel.

[0013] The beneficial effects of the utility model: the utility model provides outer bolts and inner bolts on both sides of the valve disc, and a sealing ring is provided on the valve disc. The sealing ring can form a sealing fit with the valve seat. The sealing ring is detachably connected to the valve disc through the inner bolt. When the check valve is opened and closed uninterruptedly during long-term use, the sealing ring contacts and seals with the valve seat. The sealing ring can be replaced separately after being worn, with low cost and convenient replacement, and the valve has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] The embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, a swing check valve for easy replacement of sealing parts comprises a valve body 1, the valve body 1 is provided with a medium channel 11, a valve seat 2 is arranged in the medium channel 11, the valve seat 2 is detachably connected to the valve body 1 through threads, and is convenient for disassembly and assembly, a valve disc 3 and a rocker arm 9 are arranged in the valve body 1, a valve cover 14 is arranged on the valve body 1, the valve cover 14 is detachably connected to the valve body 1 through bolts 16, a hanging bolt 13 is connected to the lower end of the valve cover 14 through threads, a pin 10 is arranged on the hanging bolt 13, one end of the rocker arm 9 is hinged to the pin, outer bolts 7 and inner bolts 6 are arranged on both sides of the valve disc 3, and the valve disc 3 is connected to the outer The bolt 7 is fixed to the free end of the rocker arm 9. A sealing ring 4 is provided on the valve disc 3. The sealing ring 4 can be made of rubber or metal. The sealing ring 4 can form a sealing fit with the valve seat 2. The sealing ring 4 is detachably connected to the valve disc 3 through the inner bolt 6. When the check valve is opened and closed continuously during long-term use, the sealing ring contacts and seals with the valve seat. After the sealing ring is worn, the valve disc 3, the rocker arm 9, and the hanging bolt 13 can be taken out together with the valve cover by removing the valve cover. The sealing ring can be replaced separately without removing the valve from the pipeline. The cost is low, the replacement is convenient, and the service life of the valve is long.

[0017] In this embodiment, a mounting groove 5 is provided on the valve disc 3, and the mounting groove 5 is adapted to the sealing ring 4. Furthermore, a plurality of positioning protrusions 51 are provided in the mounting groove 5, and the sealing ring 4 is provided with grooves adapted to the positioning protrusions 51, so that the sealing ring 4 will not slide after installation, thereby ensuring the reliability of the seal.

[0018] In this embodiment, a thread 12 is provided on the outer side of the medium channel 11 for convenient connection with a pipeline, and no additional flange bolts are required, which facilitates installation.

[0019] In this embodiment, a sealing gasket 15 is provided between the valve cover 14 and the valve body 1 to ensure that the transmission medium does not leak from the connection between the valve cover 14 and the valve body 1, thereby ensuring the reliability of the valve seal.

[0020] In this embodiment, a limiting inclined surface 8 is provided in the medium channel 11 . The limiting inclined surface 8 is provided on the swinging path of the valve flap 3 to prevent the valve flap 3 from opening too much and affecting the stability of the valve.

[0021] The embodiments should not be regarded as limiting the present invention, and any non-creative improvements made based on the spirit of the present invention should be regarded as falling within the protection scope of the present invention.

Claims

1. A swing check valve for easy replacement of sealing parts, comprising a valve body, the valve body being provided with a medium channel, the medium channel being provided with a valve seat, the valve body being provided with a valve disc and a rocker arm, and the valve body being provided with a valve cover, characterized in that: The lower end of the valve cover is connected with a hanging bolt through a thread, and the hanging bolt is provided with a pin shaft. One end of the rocker arm is hinged to the pin shaft, and external bolts and internal bolts are respectively provided on both sides of the valve disc. The valve disc is fixed to the free end of the rocker arm through the external bolts. A sealing ring is provided on the valve disc, and the sealing ring can form a sealing fit with the valve seat. The sealing ring is detachably connected to the valve disc through the internal bolts.

2. A swing check valve for easy replacement of sealing members according to claim 1, characterized in that: The valve seat is detachably connected to the valve body via threads.

3. A swing check valve for easy replacement of sealing members according to claim 1, characterized in that: The valve flap is provided with a mounting groove, and the mounting groove is matched with the sealing ring.

4. A swing check valve for easy replacement of sealing members according to claim 3, characterized in that: A plurality of positioning protrusions are arranged in the installation groove, and the sealing ring is provided with grooves matched with the positioning protrusions.

5. The swing check valve for easy replacement of sealing components according to claim 1, characterized in that: The outer side of the medium channel is provided with a thread for conveniently connecting a pipeline.

6. The swing check valve for easy replacement of sealing components according to claim 1, characterized in that: The valve cover is detachably connected to the valve body via bolts.

7. A swing check valve for easy replacement of sealing members according to claim 6, characterized in that: A sealing gasket is arranged between the valve cover and the valve body.

8. The swing check valve for easy replacement of sealing components according to claim 1, characterized in that: A limiting inclined surface is arranged in the medium channel.

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