New type of two-way damping anti-jamming slow-opening and slow-closing check valve

Abstract

This utility model belongs to the technical field of check valve equipment, and relates to a novel bidirectional damping anti-jamming slow-opening and slow-closing check valve. It includes a valve body with an internal cavity, connecting seats on the top and bottom walls, a valve stem on the connecting seats, a damping device on the outside of the valve stem, a damping cavity inside the connecting seats, and unblocking holes running through the valve stem from top to bottom. A sealing sleeve is located at the top of the valve stem. This utility model has a simple structure and manufacturing process, is easy to maintain, and has a good buffering effect. It is suitable for various water, oil, and gas media systems, slowing down the opening or closing of the valve stem to prevent corrosion or jamming, thus protecting the safe operation of the device.

Description

Technical Field

[0001] This utility model belongs to the technical field of check valve equipment, specifically relating to a novel bidirectional damping anti-jamming slow-opening and slow-closing check valve. Background Technology

[0002] In existing technologies, check valves are used in process systems to prevent backflow of the medium, prevent pumps and drive motors from reversing, and prevent the release of the medium in the container. They rely on the flow of the medium to open and close the valve disc to prevent backflow of the medium and are a type of automatic valve.

[0003] The existing check valve structure has the following problems:

[0004] 1. It lacks a back-seating buffer function and a slow-opening function. If a multi-functional check valve with an additional buffer function is selected, its cost is high, the process requirements are strict, the failure rate is high, and the reliability is low. When the pump stops, the pump is reversed, or the power is cut off, the check valve configured at the outlet of the stopped medium will quickly return to its original position under the strong force of the medium, generating a strong water hammer effect, which may cause pipeline and equipment to rupture, medium to overflow, or even major safety and process accidents.

[0005] 2. Sometimes, under the action of strong backflow force, accidents such as pump couplings instantly cutting off the connecting bolt group, coupling damage, and runaway may occur. When a partially shut-down or newly started system is started, the check valve opens quickly and the system pressure rises rapidly, which may lead to accidents such as water hammer or severe pipeline vibration.

[0006] 3. The opening and closing of the check valve utilizes the medium transported inside the pipeline as a buffer and damping medium. It is greatly affected by the quality of the medium, such as its corrosivity, hardness, and impurity content. This can cause the valve stem to corrode, affecting its operation, or even causing it to jam and lose its proper function.

[0007] Therefore, a novel bidirectional damping anti-jamming slow-opening and slow-closing check valve is proposed. Utility Model Content

[0008] The purpose of this utility model is to provide a novel bidirectional damping anti-jamming slow-opening and slow-closing check valve, which has bidirectional damping anti-jamming slow-opening and slow-closing functions, and solves the problems of existing technologies that lack reseating buffer function and slow opening function.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a novel bidirectional damping anti-jamming slow-opening and slow-closing check valve, including a valve body, an internal cavity, a valve seat on the top wall of the valve body, a connecting seat on the bottom wall of the valve body, a valve stem on the connecting seat, a valve disc on the valve stem, a damping device on the outside of the valve stem, a damping cavity inside the connecting seat, a clearing hole running through the valve stem from top to bottom, and a sealing sleeve on the top of the valve stem.

[0010] Preferably, the damping device includes a damping spring sleeved on the valve stem and a damping sealing ring disposed on the inner wall of the damping cavity, wherein the damping sealing ring and the damping cavity form a sliding sealing fit.

[0011] Preferably, the valve disc is located inside the cavity of the valve body, the lower end of the valve stem is fixedly connected to the valve disc, and the sealing sleeve forms a seal with the valve seat.

[0012] Preferably, the damping cavity is filled with a damping medium.

[0013] Preferably, the connecting seat and the valve body are separate structures connected by a sealing element, or the connecting seat and the valve body are an integral cast structure.

[0014] Preferably, the damping medium is pure water or hydraulic oil.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. This utility model has a simple structure and process, is easy to manufacture and maintain, and has a good buffering effect. It is suitable for various water, oil, gas and other media systems. It slows down the opening or closing of the operating medium to prevent valve stem corrosion or jamming and protect the safe operation of the device.

[0017] 2. This utility model has a bidirectional damping anti-jamming slow opening and slow closing function, which solves the problems of the lack of back-seating buffer function and slow opening function in the prior art. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a novel bidirectional damping anti-jamming check valve with slow opening and slow closing according to one embodiment.

[0020] In the above diagram, 1 is the valve body, 2 is the cavity, 3 is the connecting seat, 4 is the valve stem, 5 is the damping device, 6 is the damping cavity, 7 is the unblocking hole, 8 is the sealing sleeve, 9 is the valve seat, and 10 is the valve disc. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1 As shown, a novel bidirectional damping anti-jamming slow-opening and slow-closing check valve includes a valve body 1 with an internal cavity 2. The valve body 1 serves as the main structure of the check valve, providing strength support, forming a fluid channel and installation space. The internal cavity 2 accommodates the movement of the valve disc 10. The standardized design of the valve body 1 facilitates integration into a piping system. A valve seat 9 is provided on the top wall of the valve body 1, which, in conjunction with a sealing sleeve 8, forms a sealing interface in the closed state. A connecting seat 3 is provided on the bottom wall of the valve body 1, supporting and guiding the movement of the valve stem 4. The valve stem 4 is mounted on the connecting seat 3, and the valve disc 10 is mounted on the valve stem 4. The valve stem 4 transmits fluid pressure to drive the valve disc 10 to move. The valve disc 10 is opened and closed by the medium pressure. The valve disc 10 features a lightweight design, preferably using POM engineering plastic, to reduce inertia and achieve precise slow movement.

[0024] A damping device 5 is installed on the outside of the valve stem 4. The damping device 5 resists instantaneous impact when the valve is opened, preventing pipeline vibration, and delays the return to seat when the valve is closed, eliminating water hammer effect. A damping cavity 6 is provided inside the connecting seat 3, and a clearing hole 7 is provided through the valve stem 4 from top to bottom. A sealing sleeve 8 is provided at the top of the valve stem 4. When the valve is opened, the valve stem 4 moves from top to bottom, and the internal lubricating oil or pure water enters the clearing hole 7 through the lower damping cavity 6. When the valve is closed, the internal damping medium flows back into the damping cavity 6.

[0025] The damping device 5 includes a damping spring sleeved on the valve stem 4 and a damping sealing ring disposed on the inner wall of the damping cavity 6. The damping sealing ring and the damping cavity 6 form a sliding seal fit. The damping spring sleeved on the valve stem 4 provides bidirectional elastic resistance, eliminating the risk of leakage and simplifying the structure. The damping sealing ring and the damping cavity 6 form a sliding seal for dust prevention. The compression and extension of the spring, combined with the guidance of the sealing ring, achieves a purely mechanical bidirectional buffering mechanism. When the valve is opened, the damping spring is compressed to store energy, and when the valve is closed, the damping spring is released for a gentle push.

[0026] The valve disc 10 is located within the cavity 2 of the valve body 1. The lower end of the valve stem 4 is fixedly connected to the valve disc 10. The connection between the valve disc 10 and the valve stem 4 is rigid, such as by threaded locking or welding, to prevent loosening that could lead to sealing failure. The sealing sleeve 8 forms a seal with the valve seat 9. The damping cavity 6 is filled with a damping medium. The damping medium has a stable viscosity, isolates the process medium from corrosion, and ensures the damping effect.

[0027] The connecting seat 3 and the valve body 1 are separate structures connected by a sealing element. The separate structure facilitates maintenance and replacement of the damping medium. Alternatively, the connecting seat 3 and the valve body 1 can be an integral cast structure, which eliminates the risk of seal failure.

[0028] The damping medium is either pure water or hydraulic oil. Pure water is environmentally friendly and low-cost, suitable for operating conditions of 0-80℃, while hydraulic oil has a wide temperature range of -30 to 120℃, covering all industrial scenarios.

[0029] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A new check valve of bidirectional damping anti-stuck slow opening and slow closing, comprising a valve body, a cavity is arranged in the valve body, characterized in that, The valve body has a valve seat on its top wall and a connecting seat on its bottom wall. A valve stem is mounted on the connecting seat, and a valve disc is mounted on the valve stem. A damping device is mounted on the outside of the valve stem, and a damping cavity is mounted inside the connecting seat. A clearing hole is provided through the valve stem from top to bottom, and a sealing sleeve is mounted on the top of the valve stem.

2. The bidirectional damping non-stuck slow opening and closing new type check valve according to claim 1, characterized in that, The damping device includes a damping spring sleeved on the valve stem and a damping sealing ring disposed on the inner wall of the damping cavity, wherein the damping sealing ring and the damping cavity form a sliding sealing fit.

3. The bidirectional damping non-stuck slow opening and closing new type check valve according to claim 1, characterized in that, The valve disc is located inside the cavity of the valve body, the lower end of the valve stem is fixedly connected to the valve disc, and the sealing sleeve forms a seal with the valve seat.

4. The bidirectional damping non-stuck slow opening and closing new type check valve according to claim 1, characterized in that, The damping cavity is filled with a damping medium.

5. The bidirectional, damped, non-stuck, slow-opening, slow-closing, new-type check valve according to claim 1, characterized in that, The connecting seat and the valve body are either separate structures connected by a sealing element, or the connecting seat and the valve body are an integral cast structure.

6. The novel bidirectional damping anti-jamming slow-opening and slow-closing check valve according to claim 4, characterized in that, The damping medium is pure water or hydraulic oil.

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