Damping sealing type one-way valve

Abstract

The utility model provides a damping sealing type one-way valve which comprises an inlet valve body with an inflow cavity and an outlet valve body with an outflow cavity, an elastic valve element is arranged in a butt joint cavity of the inlet valve body and the outlet valve body, and an elastic telescopic interval for medium damping is formed between the elastic valve element and the butt joint cavity. The elastic valve element is provided with an inner channel communicated with the inflow cavity and the outflow cavity, and the elastic valve element and the inlet valve body can be matched to form a closed structure. The damping cavity is arranged between the valve element and the valve body, damping force is produced due to the fact that medium entering and exiting are blocked and the space of the damping cavity cannot be rapidly changed, high-frequency reciprocating motion of the valve element is restrained in cooperation with spring force, vibration of the valve element can be effectively overcome, damage to the one-way valve due to frequent impact is avoided, and the one-way circulation effect is ensured. The arrangement space of the spring is separated from the main channel, and the sealing block is arranged, so that filamentous substances in a medium are effectively prevented from being wound on the spring, the main channel is prevented from being blocked due to accumulation of the filamentous substances, and continuous smoothness of the one-way channel is kept.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a valve, in particular to a damping sealing type one-way valve. Background Art

[0002] A one-way valve allows fluid to flow only through its inlet, but not back through its outlet. Also known as a check valve or non-return valve, one-way valves are commonly used in hydraulic systems to prevent reverse flow of oil, or in pneumatic systems to prevent reverse flow of compressed air.

[0003] Existing one-way valves have the following disadvantages:

[0004] 1. When spring-return check valves are currently used in gas or liquid systems with large pressure or flow fluctuations, the valve core is prone to high-frequency back-and-forth vibration. This is especially true when used with low-flow gases, where the volume of the gas changes with pressure, making the valve core vibration more pronounced and at a high frequency. This high-frequency vibration and constant impact on the valve seat can quickly damage the valve core and even cause the spring to break.

[0005] 2. Currently, the spring-return one-way valves on the market generally place the spring in the main channel through which the medium flows. When there are fibrous or filamentous substances in the medium, it is easy to be entangled on the spring. After the one-way valve has been working for a long time, more and more debris will be entangled on the spring, which will cause the one-way valve channel to be blocked. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems in the existing technology and to propose a damping sealing type one-way valve.

[0007] The purpose of the utility model can be achieved through the following technical solutions: a damping sealed one-way valve, comprising an inlet valve body having an inflow cavity and an outlet valve body having an outflow cavity, an elastic valve core is arranged in the docking cavity between the inlet valve body and the outlet valve body, an elastic expansion and contraction interval with medium damping is formed between the elastic valve core and the docking cavity, the elastic valve core has an internal channel connecting the inflow cavity and the outflow cavity, and the elastic valve core and the inlet valve body can cooperate to form a closed structure.

[0008] In the above-mentioned damping sealing type one-way valve, the elastic valve core includes a valve core and a spring, the spring is sleeved on the outer periphery of the valve core, the head end of the valve core faces the inlet valve body, the middle part of the valve core is convexly provided with an expanded diameter step surface, and the tail end of the valve core faces the outlet valve body.

[0009] In the above-mentioned damping sealing type one-way valve, one end of the spring abuts against the expanded diameter step surface, and the other end of the spring abuts against the reduced diameter step surface of the outlet valve body, and a damping cavity is formed between the expanded diameter step surface and the reduced diameter step surface. A sealing ring 1 is embedded in the outer periphery of the expanded diameter step surface, and the sealing ring 1 slides and closely adheres to the inner wall of the inlet valve body. A narrow channel 1 connected to the damping cavity is provided on the sealing ring 1. A sealing ring 2 is embedded in the outer periphery of the tail end of the valve core, and the sealing ring 2 slides and closely adheres to the inner wall of the outlet valve body. A narrow channel 2 connected to the damping cavity is provided on the sealing ring 2.

[0010] In the damping seal type one-way valve mentioned above, a limiting step is convexly provided on the inner periphery of the outlet valve body, the inner diameter of the limiting step is smaller than the inner diameter of the reduced diameter step surface, and the tail end of the valve core contacts the limiting step to form a stop.

[0011] In the above-mentioned damping sealing type one-way valve, the head end of the valve core is a closed end, and the circumference of the closed end has a conical or spherical sealing surface. The inner circumference of the inlet valve body is provided with an inner conical valve seat, and the sealing surface is tightly attached to the valve seat to seal the inflow cavity.

[0012] In the above-mentioned damping sealing type one-way valve, the valve core has the internal channel, the head end of the internal channel is blocked by the closed end, the tail end of the internal channel is connected to the outflow cavity through the opening, and at least one flow inclined hole is opened on the wall surface between the closed end and the expanded diameter step surface, the outer end of the flow inclined hole is connected to the annular gap between the valve core and the inlet valve body, and the inner end of the flow inclined hole is connected to the internal channel.

[0013] In the above-mentioned damping sealing type one-way valve, the outlet end of the inlet valve body has an inner pipe section, and the outer peripheral wall of the inner pipe section is tapped with an external thread. The inlet end of the outlet valve body has an outer pipe section, and the inner peripheral wall of the outer pipe section is tapped with an internal thread. The inner pipe section penetrates into the outer pipe section so that the external thread and the internal thread form a threaded engagement connection.

[0014] In the damping seal type one-way valve, a sealing member is embedded on the end surface of the inner pipe section, and the inner pipe section is sleeved and matched with the outer pipe section so that the sealing member abuts against the sealing step surface of the outer pipe section.

[0015] In the damping seal type one-way valve, a first connecting thread is provided on the inner surface of the inlet chamber of the inlet valve body, and a second connecting thread is provided on the inner surface of the outlet chamber of the outlet valve body.

[0016] Compared with the existing technology, this damping seal type one-way valve has the following beneficial effects:

[0017] 1. By setting a damping chamber between the valve core and the valve body, the medium in the damping chamber is blocked and the space in the damping chamber cannot change rapidly, thereby generating a damping force. The spring force is combined with the spring force to suppress the high-frequency reciprocating motion of the valve core, thereby effectively overcoming the vibration of the valve core, avoiding damage to the one-way valve due to frequent impact, ensuring the effect of one-way flow, and extending the service life.

[0018] 2. Separate the spring layout space from the main channel and set a sealing barrier to effectively prevent the filamentous matter in the medium from being entangled on the spring, thereby avoiding the blockage of the main channel caused by the accumulation of filamentous matter, keeping the one-way channel continuously unobstructed, and improving the safety factor.

[0019] 3. A high-quality seal is formed between the closed end of the valve core and the valve seat to ensure that the medium does not leak when closed, thereby improving the safety and stability of the system.

[0020] 4. The design of internal channels and multiple oblique holes enables the medium to flow in evenly, with smooth channels and no sharp turns, thereby reducing flow resistance and improving the flow efficiency of the valve.

[0021] 5. The setting of the guide cavity ensures that the valve core always maintains good axis alignment during movement, avoids the deflection and sticking of the valve core, and improves the operation stability and reliability of the valve.

[0022] 6. The design of the limit step ensures that the valve core is protected within the maximum movement range, preventing the potential risk caused by excessive compression of the spring and improving the safety of operation.

[0023] In summary, this damping sealed one-way valve not only has superior performance in terms of sealing, fluidity and vibration control, but also can effectively reduce maintenance difficulty and improve safety, and is suitable for wide use in various industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the exploded planar structure diagram of the damping seal type one-way valve.

[0025] Figure 2 This is the internal structure diagram of the damping seal type one-way valve in the closed state.

[0026] Figure 3 This is the internal structure diagram of the damping seal type one-way valve in the open state.

[0027] Figure 4 This is a schematic diagram of the structure of the sealing ring in this damping sealing type one-way valve.

[0028] Figure 5 This is the exploded three-dimensional structure diagram of the damping seal type one-way valve.

[0029] Figure 6This is the assembly three-dimensional structure diagram of this damping seal type one-way valve.

[0030] In the figure, 1. inlet valve body; 1a. inflow chamber; 1b. valve seat; 2. outlet valve body; 2a. outflow chamber; 2b. reduced diameter step surface; 2c. limit step; 3. valve core; 3a. closed end; 3b. expanded diameter step surface; 3c. flow inclined hole; 3d. internal channel; 4. spring; 5. damping chamber; 6. sealing ring 1; 6a. narrow channel 1; 7. sealing ring 2; 7a. narrow channel 2; 8. sealing element. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figures 1 to 6 As shown, the damping sealing type one-way valve includes an inlet valve body 1 with an inflow chamber 1a and an outlet valve body 2 with an outflow chamber 2a. An elastic valve core is arranged in the docking chamber between the inlet valve body 1 and the outlet valve body 2. An elastic expansion and contraction zone with medium damping is formed between the elastic valve core and the docking chamber. The elastic valve core has an internal channel 3d connecting the inflow chamber 1a and the outflow chamber 2a. The elastic valve core and the inlet valve body 1 can cooperate to form a closed structure.

[0033] like Figure 1 and 5 As shown, the elastic valve core includes a valve core 3 and a spring 4. The spring 4 is sleeved around the outer periphery of the valve core 3. The leading end of the valve core 3 faces the inlet valve body 1. A stepped surface 3b with an enlarged diameter is provided in the middle of the valve core 3. The trailing end of the valve core 3 faces the outlet valve body 2. A guide cavity 1 is provided within the inlet valve body 1 to guide the slidable valve core 3. The inner wall of the guide cavity slides with the valve core 3, ensuring that the axis of the valve core 3 and the axis of the guide cavity 1 substantially coincide with each other during the back-and-forth movement of the valve core 3. A guide cavity 2 is provided within the outlet valve body 2 to guide the slidable valve core 3. The inner wall of the guide cavity 2 slides with the valve core 3, ensuring that the axis of the valve core 3 and the axis of the guide cavity 2 substantially coincide with each other during the back-and-forth movement of the valve core 3. The valve core 3 is guided by the valve body both forward and backward during its movement, preventing it from deflecting.

[0034] The fluid enters from the inlet valve body 1 through the inflow chamber 1 a, passes through the internal channel 3 d of the valve core 3 , and finally flows out from the outflow chamber 2 a of the outlet valve body 2 .

[0035] The leading end of the valve core 3 is a closed end 3a, which has a conical or spherical sealing surface around it. An inwardly tapered valve seat 1b is positioned on the inner circumference of the inlet valve body 1. This sealing surface abuts against the valve seat 1b, sealing the inflow chamber 1a. The taper and orientation of the valve seat 1b and the closed end 3a are identical. The inner circumference of the valve seat 1b and the sealing surface facing the closed end 3a are both smooth, forming a perfect seal and effectively shutting off the flow of the medium. When the valve is closed, the force of the spring 4 presses against the valve core 3, forcing the sealing surface of the closed end 3a into contact with the inner circumference of the valve seat 1b, thereby shutting off the flow.

[0036] The valve core 3 has an internal passage 3d, the leading end of which is blocked by the closed end 3a. The trailing end of the internal passage 3d is open and connected to the outflow chamber 2a. At least one inclined flow hole 3c is defined in the wall between the closed end 3a and the stepped surface 3b. The outer end of the inclined flow hole connects to the annular gap between the valve core 3 and the inlet valve body 1, while the inner end of the inclined flow hole connects to the internal passage 3d. Multiple inclined flow holes 3c are evenly distributed around the axis of the valve core 3, ensuring that the medium flows evenly from all sides into the internal passage 3d.

[0037] When the medium enters from the inlet chamber 1a of the valve body 1, the fluid pushes the valve core 3 to compress the spring 4 and move toward the outlet valve body 2. The sealing surface of the closed end 3a separates from the inner circumference of the valve seat 1b, thereby generating an annular gap. The medium flows to the oblique flow hole on the side wall of the valve core 3, enters the internal channel 3d through the oblique flow hole, and then enters the outflow chamber 2a for discharge, thus achieving the communication state between the inlet valve body 1 and the outlet valve body 2.

[0038] One end of the spring 4 abuts against the expanded step surface 3b, and the other end of the spring 4 abuts against the reduced step surface 2b of the outlet valve body 2. A damping cavity 5 is formed between the expanded step surface 3b and the reduced step surface 2b. A sealing ring 6 is embedded in the outer periphery of the expanded step surface 3b. The sealing ring 6 slides and tightly adheres to the inner wall of the inlet valve body 1. Figure 4 As shown, a narrow channel 6a is provided on the sealing ring 16 to communicate with the damping chamber 5, and a sealing ring 27 is embedded in the outer periphery of the tail end of the valve core 3. The sealing ring 27 is slidably attached to the inner wall of the outlet valve body 2, as shown in FIG. Figure 4 As shown, a narrow channel 7a is defined in the second sealing ring 7, communicating with the damping chamber 5. The damping chamber 5 acts as an elastic expansion and contraction zone. The spring 4 is disposed within the damping chamber 5, and the sealing ring forms a sliding seal on both sides of the damping chamber 5. The narrow channel ensures that the liquid or gas in the damping chamber 5 can only enter and exit the damping chamber 5 slowly.

[0039] When valve core 3 moves to connect inflow chamber 1a with outflow chamber 2a, seal ring 1 6 slides closely against the inner wall of inlet valve body 1, while seal ring 2 7 slides closely against the inner wall of outlet valve body 2. This prevents filamentous matter in the circulating medium from entering damping chamber 5 and entangled with spring 4, causing blockage. Furthermore, the combination of spring 4 and damping chamber 5 provides elastic cushioning, effectively absorbing high-frequency vibrations.

[0040] A stopper step 2c is convexly formed on the inner circumference of the outlet valve body 2. The inner diameter of the stopper step 2c is smaller than that of the reduced-diameter step surface 2b. The tail end of the valve core 3 contacts the stopper step 2c, forming a stop. By compressing the damping chamber 5 and simultaneously compressing the spring 4, the valve core 3 moves toward the outlet valve body 2. The maximum movement is achieved when the tail end of the valve core 3 abuts the stopper step 2c, stopping further compression of the spring 4. This ensures effective opening of the valve core 3 while protecting the spring 4. Furthermore, the stopper improves the stability of the valve core 3 in the fluid medium and reduces high-frequency vibrations.

[0041] The outlet end of inlet valve body 1 has an inner pipe section with external threads tapped on its outer circumference. The inlet end of outlet valve body 2 has an outer pipe section with internal threads tapped on its inner circumference. The inner pipe section penetrates the outer pipe section, forming a threaded connection with the internal threads. Threaded assembly is a common pipe installation method, offering convenient connection and ease of assembly and disassembly, improving assembly and disassembly efficiency and facilitating subsequent maintenance. Threaded assembly also offers high connection stability and strong sealing.

[0042] A seal 8 is embedded in the end face of the inner tube section. The inner and outer tube sections are sleeved together, with the seal 8 abutting the outer tube section's sealing step. The sealing step is a circumferential step at the inner end of the outer tube section. The inner tube section is inserted into the outer tube section and screwed continuously until the seal 8 presses against the sealing step and stops. This seal 8 establishes a sealed connection between the inlet valve body 1 and the outlet valve body 2, preventing leakage from the one-way valve.

[0043] The inner surface of the inflow chamber 1a of the inlet valve body 1 is provided with a first connecting thread, while the inner surface of the outflow chamber 2a of the outlet valve body 2 is provided with a second connecting thread. The first connecting thread connects the inlet valve body 1 to another pipe or fitting. The second connecting thread connects the outlet valve body 2 to another pipe or fitting.

[0044] The damping seal type one-way valve works in the following ways:

[0045] 1. The valve is in the closed state

[0046] like Figure 2As shown, the liquid or gas medium in the system flows from the outlet valve body 2 to the inlet valve body. The flow direction of the medium is opposite to the opening flow direction of the one-way valve. At this time, the spring 4 presses the valve core 3 against the valve seat 1b, and the force of the liquid or gas medium on the valve core 3 is also in the direction of pressing the valve core 3 against the valve seat 1b. At this time, the sealing surface of the valve core 3 and the inner circumferential surface of the valve seat 1b are completely stuck and effectively sealed. The one-way valve is in a closed state and the medium cannot flow through the one-way valve.

[0047] 2. The valve is in the open state

[0048] like Figure 3 As shown, in the system, liquid or gas medium flows from the inlet valve body 1 to the outlet valve body 2. When the pressure of the medium is greater than the elastic force of the spring 4, the medium pushes the valve core 3 away from the valve seat 1b, and the medium enters from the inlet chamber 1a, flows through the inclined flow hole 3c on the valve core 3 into the internal channel 3d, and then flows out of the one-way valve from the outflow chamber 2a. When the one-way valve is in the open state, under the combined action of the pressure fluctuation of the gas or liquid medium and the force of the spring 4, the valve core 3 and the spring 4 together form a high-frequency vibration system, and the valve core 3 will be subjected to the action of the reciprocating force. If the valve core 3 wants to reciprocate at high frequency and quickly, it must quickly alternately compress and expand the volume of the damping chamber 5. However, since sealing rings are provided on both sides of the damping chamber 5, only narrow channels are left. This prevents the liquid or gas medium in the damping chamber 5 from quickly entering and exiting the damping chamber 5, and the cavity volume of the damping chamber 5 cannot change quickly, thereby effectively suppressing the high-frequency vibration of the valve core 3 and avoiding premature damage to the one-way valve.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the present invention or exceed the defined scope. Although the present invention is described and described in detail in the drawings and the foregoing description, such illustrations and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the present invention covers additional embodiments having any combination of features from the different embodiments described above. Insofar as the expression "generally" or "substantially" is used, this patent application should be understood to disclose features and values ​​that are also fully satisfied, i.e., without the aforementioned characterization as "generally" or "substantially".

[0050] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A damping seal type one-way valve, comprising an inlet valve body having an inflow cavity and an outlet valve body having an outflow cavity, wherein an elastic valve core is provided in the docking cavity between the inlet valve body and the outlet valve body, characterized in that: An elastic expansion and contraction zone with medium damping is formed between the elastic valve core and the docking cavity. The elastic valve core has an internal channel connecting the inlet cavity and the outflow cavity. The elastic valve core and the inlet valve body can cooperate to form a closed structure.

2. The damping seal type one-way valve according to claim 1, characterized in that: The elastic valve core includes a valve core and a spring, the spring is sleeved on the outer periphery of the valve core, the head end of the valve core faces the inlet valve body, the middle part of the valve core is convexly provided with a diameter expansion step surface, and the tail end of the valve core faces the outlet valve body.

3. The damping seal type one-way valve according to claim 2, characterized in that: One end of the spring abuts against the expanded step surface, and the other end of the spring abuts against the reduced step surface of the outlet valve body, a damping cavity is formed between the expanded step surface and the reduced step surface, a sealing ring 1 is embedded in the outer periphery of the expanded step surface, the sealing ring 1 slides and closely adheres to the inner wall of the inlet valve body, a narrow channel 1 connected to the damping cavity is provided on the sealing ring 1, a sealing ring 2 is embedded in the outer periphery of the tail end of the valve core, the sealing ring 2 slides and closely adheres to the inner wall of the outlet valve body, a narrow channel 2 connected to the damping cavity is provided on the sealing ring 2.

4. The damping seal type one-way valve according to claim 3, characterized in that: A limiting step is convexly provided on the inner periphery of the outlet valve body, the inner diameter of the limiting step is smaller than the inner diameter of the diameter-reducing step surface, and the tail end of the valve core contacts the limiting step to form a stop.

5. The damping seal type one-way valve according to claim 2, characterized in that: The first end of the valve core is a closed end, and the circumference of the closed end has a conical or spherical sealing surface. The inner circumference of the inlet valve body is provided with an inner conical valve seat, and the sealing surface is tightly attached to the valve seat to seal the inflow cavity.

6. The damping seal type one-way valve according to claim 5, characterized in that: The valve core has an internal channel, the head end of the internal channel is blocked by the closed end, the tail end of the internal channel is connected to the outflow cavity through an opening, and at least one flow-through inclined hole is opened on the wall surface between the closed end and the expanded step surface. The outer end of the flow-through inclined hole is connected to the annular gap between the valve core and the inlet valve body, and the inner end of the flow-through inclined hole is connected to the internal channel.

7. The damping seal type one-way valve according to claim 1, characterized in that: The outlet end of the inlet valve body has an inner pipe section, and the outer peripheral wall of the inner pipe section is tapped with an external thread. The inlet end of the outlet valve body has an outer pipe section, and the inner peripheral wall of the outer pipe section is tapped with an internal thread. The inner pipe section penetrates into the outer pipe section so that the external thread and the internal thread form a threaded engagement connection.

8. The damping seal type one-way valve according to claim 7, characterized in that: A sealing member is embedded on the end surface of the inner pipe section, and the inner pipe section is sleeved and matched with the outer pipe section so that the sealing member abuts against the sealing step surface of the outer pipe section.

9. The damping seal type one-way valve according to claim 1, characterized in that: A first connecting thread is provided on the inner surface of the inlet cavity of the inlet valve body, and a second connecting thread is provided on the inner surface of the outlet cavity of the outlet valve body.

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