Wafer type check valve

Abstract

The utility model relates to the technical field of check valves, and discloses a double-clip type check valve which comprises a supporting frame and a guide seat which are fixedly connected with each other, a closed cavity is arranged between the outer wall and the inner wall of the supporting frame, a hot water inlet communicated with the closed cavity is arranged above the supporting frame, and a hot water outlet communicated with the guide seat is arranged above the hot water inlet. A hot water outlet communicated with the closed cavity is formed in the lower portion of the supporting frame, a fluid medium inflow port is formed in the right side of the supporting frame, a fluid medium outflow port is formed in the guide seat, the telescopic rod is arranged between the fluid medium inflow port and the fluid medium outflow port, and the telescopic rod is sleeved with a spring matched with the guide seat. According to the wafer type check valve, the one-way flowing effect is achieved through the cooperation of the telescopic rod and the spring, the wafer type check valve has the advantages of being good in stability and not prone to damage, the flowability of fluid in the valve body is kept stable, inclined face metal sealing is adopted, the sealing area is large, sealing performance is good, and sensitivity is high.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a wafer-type check valve. Background Technology

[0002] A check valve is a type of valve that automatically opens and closes in one direction based on the flow of the medium itself. When the pressure at the bottom of the valve stem exceeds the pressure at the top of the valve stem and the spring force itself, the check valve disc will open; otherwise, it will automatically close. This allows the medium to flow in one direction within the pipeline, preventing backflow and accidents.

[0003] Currently, the most commonly used sealing methods for wafer check valves in the industry are soft seals with sealing rings and metal flat seals. These are susceptible to changes in ambient temperature, material viscosity, or water hammer, which can lead to decreased sealing performance or sensitivity, and increased equipment maintenance costs. Therefore, improvements are needed. Utility Model Content

[0004] This invention provides a wafer-type check valve, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wafer-type check valve includes a support frame and a guide seat fixedly connected to each other. A sealed cavity is provided between the outer and inner walls of the support frame. A hot water inlet communicating with the sealed cavity is provided above the support frame, and a hot water outlet communicating with the sealed cavity is provided at the lower part of the support frame. A fluid medium inlet is provided on the right side of the support frame, and a fluid medium outlet is provided on the guide seat. A telescopic rod is provided between the fluid medium inlet and the fluid medium outlet, and a spring that cooperates with the guide seat is sleeved on the outside of the telescopic rod.

[0007] As a preferred embodiment of this utility model, a plastic bearing is provided between the guide seat and the telescopic rod.

[0008] In a preferred embodiment of this invention, the guide seat and the support frame are fixed by bolt connection.

[0009] The present invention has the following advantages:

[0010] 1. The valve body components are mainly made of stainless steel, making them more durable.

[0011] 2. The support frame has a sealed cavity between the outer and inner walls, which allows hot water circulation to keep the fluid temperature inside the valve body stable.

[0012] 3. It adopts a metal bevel seal, which has a large contact area, good sealing performance and high sensitivity.

[0013] 4. The support frame and guide seat are connected with internal hex screws, which makes disassembly and maintenance simple.

[0014] 5. The thin end of the telescopic rod passes through a plastic bearing and slides relative to the plastic bearing, avoiding direct metal-to-metal friction, making it safer and smoother.

[0015] 6. The outer end face of the support frame and guide seat has multiple grooves for sealing, which makes the valve body more airtight and the fluid inside the valve body less likely to leak. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of a clamp-type check valve.

[0018] Figure 2 This is a left view of a clamp check valve.

[0019] Figure 3 This is a right view of a clamp-type check valve.

[0020] In the diagram: 1. Hex socket screw; 2. Support frame; 3. Guide seat; 4. Telescopic rod; 5. Plastic bearing; 6. Spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In one embodiment, see Figures 1-3A clamp-type check valve includes a support frame 2 and a guide seat 3 fixedly connected to each other. A sealed cavity is provided between the outer and inner walls of the support frame 2. A hot water inlet communicating with the sealed cavity is provided at the top of the support frame 2, and a hot water outlet communicating with the sealed cavity is provided at the bottom of the support frame 2. A fluid medium inlet is provided on the right side of the support frame 2, and a fluid medium outlet is provided on the guide seat 3. A telescopic rod 4 is provided between the fluid medium inlet and the fluid medium outlet, and a spring 6 cooperating with the guide seat 3 is sleeved on the outside of the telescopic rod 4. A plastic bearing 5 is provided between the guide seat 3 and the telescopic rod 4.

[0023] In one embodiment, the support frame 2 has a sealed cavity between its outer and inner walls. The outer walls of the support frame 2 have hot water inlets and outlets communicating with the sealed cavity. The support frame 2 also includes a fluid medium inlet and a beveled sealing surface for engaging with the telescopic rod 4. The guide seat 3 has a fluid medium outlet, a plastic bearing 5 mounting hole, and a telescopic spring 6 guide post. The telescopic rod 4 is installed between the inlet of the support frame 2 and the outlet of the guide seat 3. A spring 6 is fitted onto the telescopic rod 4, tightly fitting against the inner end face of its thicker end. The other end of the spring 6 rests against the guide seat 3. The thinner end of the telescopic rod 4 passes through the plastic bearing 5 and is slidably connected relative to it. The thicker end of the telescopic rod 4 has a beveled sealing surface for engaging with the support frame 2. The spring 6 supports the opening and closing of the telescopic rod 4.

[0024] In one embodiment, the guide seat 3 and the support frame 2 are fixed by bolts. The support frame 2 and the guide seat 3 are connected by hex socket head cap screws 1 for easy disassembly, and the components are made of stainless steel.

[0025] In this embodiment, before operation, hot water is circulated into the cavity of the support frame 2. During operation, pressurized fluid pushes the telescopic rod 4 open through the inlet on the support frame 2, compressing the spring 6, and causing the telescopic rod 4 to slide towards the guide seat 3. The material enters the check valve cavity and flows out through the outlet on the guide seat 3. When the incoming fluid has no pressure, the spring 6 extends, and the telescopic rod 4 completely seals against the support frame 2.

[0026] It has the following advantages:

[0027] 1. The valve body components are mainly made of stainless steel, making them more durable.

[0028] 2. The support frame 2 has a sealed cavity between the outer and inner walls, through which hot water can circulate, so that the fluid temperature in the valve body remains stable.

[0029] 3. It adopts a metal bevel seal, which has a large contact area, good sealing performance and high sensitivity.

[0030] 4. The support frame 2 and the guide seat 3 are connected by hex socket screws 1, which makes disassembly convenient and maintenance simple.

[0031] 5. The thin end of the telescopic rod 4 passes through the plastic bearing 5 and is slidably connected relative to the plastic bearing 5, avoiding direct metal-to-metal friction, making it safer and smoother.

[0032] 6. The outer end faces of the support frame 2 and the guide seat 3 have multiple grooves for sealing, which makes the valve body more airtight and the fluid inside the valve body less likely to leak.

[0033] This utility model applies to a wafer-type check valve, which achieves unidirectional flow through the cooperation of the telescopic rod 4 and the spring 6. It features good stability and is not easily damaged, keeping the fluid flow in the valve body stable. It adopts a beveled metal seal, which has a large sealing area, good sealing performance, and high sensitivity.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wafer-type check valve, characterized in that, The device includes a support frame and a guide seat that are fixedly connected to each other. A sealed cavity is provided between the outer and inner walls of the support frame. A hot water inlet communicating with the sealed cavity is provided above the support frame. A hot water outlet communicating with the sealed cavity is provided at the lower part of the support frame. A fluid medium inlet is provided on the right side of the support frame. A fluid medium outlet is provided on the guide seat. A telescopic rod is provided between the fluid medium inlet and the fluid medium outlet. A spring that cooperates with the guide seat is sleeved on the outside of the telescopic rod.

2. A wafer-type check valve according to claim 1, characterized in that, A plastic bearing is provided between the guide seat and the telescopic rod.

3. A wafer-type check valve according to claim 1, characterized in that, The guide seat and the support frame are fixed together by bolts.

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