Butt clamp swing check valve

Abstract

The utility model discloses a wafer swing check valve, which relates to the technical field of valves, and comprises a valve body, a valve clack and a valve seat, the valve seat is provided with an extension part, the extension part is provided with a pin shaft in a penetrating manner, the upper end of the valve clack is hinged to the pin shaft, the valve seat is provided with a sealing surface in sealing fit with the valve clack, the valve body is provided with a first step surface, and the first step surface is provided with a second step surface. A clamping groove used for installing a clamping ring is formed in the transverse face of the first step face, a pin hole used for installing a pin is formed in the longitudinal face of the first step face, and the valve seat is detachably connected with the valve body through the pin and the clamping ring. The valve seat is convenient to disassemble and assemble, the valve clack is installed on the valve seat, the valve seat and the valve clack can be disassembled together when the valve seat is disassembled, and maintenance and replacement are convenient.

Description

Technical Field

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

[0002] A check valve is an automatic valve that opens and closes automatically based on the flow and force of the medium to prevent backflow. It's primarily used in pipelines with unidirectional flow, allowing the medium to flow in only one direction to prevent accidents. A swing check valve is a type of check valve. Existing wafer-type swing check valves typically utilize a swing structure with an internal rocker disc. This can lead to inconvenient repair and disassembly if the rocker disc is damaged or the sealing surface is worn. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the utility model provides a wafer-type swing check valve.

[0004] The technical solutions provided by this utility model are:

[0005] A wafer-type swing check valve comprises a valve body, a valve disc and a valve seat, the valve seat being provided with an extension portion, the extension portion being penetrated by a pin shaft, the upper end of the valve disc being hinged to the pin shaft, the valve seat being provided with a sealing surface for forming a sealing fit with the valve disc, the valve body being provided with a first step surface, the transverse surface of the first step surface being provided with a groove for installing a retaining ring, and the longitudinal surface being provided with a pin hole for installing a pin, the valve seat being detachably connected to the valve body via a pin and a retaining ring.

[0006] A dovetail groove is provided on the valve seat, a valve seat sealing ring is provided in the dovetail groove, and the valve seat sealing ring and the valve disc form a sealing fit.

[0007] An O-type sealing ring is provided between the valve seat and the valve body.

[0008] The valve body is provided with a lifting ring, which is detachably connected to the valve body via a thread.

[0009] The beneficial effects of the utility model are as follows: the utility model realizes the detachable connection between the valve seat and the valve body through the pin and the clamping ring, and the valve seat is convenient to disassemble and assemble. By arranging an extension part on the valve seat, the valve disc is installed on the valve seat. When the valve seat is disassembled, the valve disc can be disassembled together with the valve seat, which is convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0011] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0012] like Figure 1The figure shows a wafer-type swing check valve comprising a valve body 1, a valve disc 2, and a valve seat 3. The valve seat 3 is provided with an extension 31 extending from the upper end of the valve disc into the valve body in the shape of a rocking fork. A pin 5 is passed through the extension 31. The upper end of the valve disc 2 is hinged to the pin 5. The valve seat 3 is provided with a sealing surface that forms a seal with the valve disc 2. When there is no upstream medium pressure, the valve disc 2 rests against the valve seat 3 due to its own gravity. When the valve disc 2 is impacted by the medium, it rotates about the pin 5, thereby opening the valve. The valve body 1 is provided with a first step surface. The transverse surface of the first step surface is provided with a retaining groove 11 for installing a retaining ring, and the longitudinal surface is provided with a pin hole 9 for installing a pin. The valve seat 3 is detachably connected to the valve body 1 via a pin 10 and a retaining ring 12. Specifically, a positioning hole corresponding to the valve seat pin hole 9 is provided on the valve seat 3. When installing the valve seat, align the positioning hole with the pin hole 9 and then install the pin 10. Finally, install the clamping ring 12 in the clamping groove 11 so that the two sides of the clamping ring press against the valve body 1 and the valve seat 3 respectively. Conversely, the valve seat can be quickly disassembled. When the valve seat is disassembled, it can be disassembled together with the valve disc, which is convenient for maintenance and replacement.

[0013] In this embodiment, a dovetail groove 6 is provided on the valve seat 3, and a valve seat sealing ring 7 is provided in the dovetail groove 6. The valve seat sealing ring 7 and the valve disc 2 form a sealing fit. The dovetail groove 6 ensures that the valve seat sealing ring 7 is fixed and stable and will not fall off, thereby ensuring the reliability of the seal. The valve seat sealing ring 7 is easy to replace after wear.

[0014] In this embodiment, an O-ring 8 is provided between the valve seat 3 and the valve body 1 to ensure the sealing of the valve seat 3 and the valve body 1. The valve seat 3 is provided with an annular groove, and the O-ring 8 is installed in the annular groove. It can be disassembled together with the valve seat and can be easily replaced after it has aged after long-term use.

[0015] In this embodiment, a lifting ring 4 is provided on the valve body 1. The lifting ring 4 can provide support during installation and improve installation efficiency. The lifting ring 4 is detachably connected to the valve body 1 through a thread and can be disassembled and removed after the valve installation is completed to save space.

[0016] The embodiments should not be regarded as limiting the present invention, and any non-inventive improvements based on the spirit of the present invention should be regarded as falling within the protection scope of the present invention.

Claims

1. A wafer-type swing check valve, comprising a valve body, a valve disc, and a valve seat, characterized in that: The valve seat is provided with an extension portion, the extension portion is penetrated by a pin shaft, the upper end of the valve disc is hinged to the pin shaft, the valve seat is provided with a sealing surface that forms a sealing fit with the valve disc, the valve body is provided with a first step surface, the transverse surface of the first step surface is provided with a groove for installing a retaining ring, and the longitudinal surface is provided with a pin hole for installing a pin, and the valve seat is detachably connected to the valve body through the pin and the retaining ring.

2. The wafer-type swing check valve according to claim 1, characterized in that: A dovetail groove is provided on the valve seat, a valve seat sealing ring is provided in the dovetail groove, and the valve seat sealing ring and the valve disc form a sealing fit.

3. The wafer-type swing check valve according to claim 1, characterized in that: An O-type sealing ring is provided between the valve seat and the valve body.

4. The wafer-type swing check valve according to claim 1, characterized in that: The valve body is provided with a lifting ring, which is detachably connected to the valve body via a thread.

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