Sealing valve seat and air tightness testing tool thereof

Abstract

The utility model discloses a sealing valve seat and air tightness test tool, including PEEK material's main part, said main part is hollow and constitutes the flow passage, and the periphery of main part constitutes the sealing area and the rebound area, the sealing area is embedded with the seal ring, the rebound area is sleeved with the elastic ring.

Description

Technical Field

[0001] This utility model relates to the field of sealing valve equipment technology, specifically to a sealing valve seat and its airtightness testing fixture. Background Technology

[0002] The sealing valve seat is the core component of a sealed valve. It is mainly responsible for tightly fitting with the valve core (or valve disc) to form a reliable seal and prevent media leakage. Its material must be resistant to high temperature, corrosion and wear to adapt to different working conditions (such as high pressure, vacuum or corrosive fluids). The machining accuracy of the valve seat directly affects the sealing performance and ensures zero leakage when the valve is closed. In aerospace, chemical and other fields, the reliability of the sealing valve seat is directly related to the safety and efficiency of the system and is the key guarantee for the long service life and high sealing performance of the valve.

[0003] During use, the sealing valve seat undergoes a tight fit with the valve core, leading to wear on the sealing valve seat and affecting its sealing performance. Therefore, existing sealing valve seats are generally made of wear-resistant materials, resulting in a lack of elastic deformation capability. This can cause the spherical valve core to be unable to rotate or have difficulty rotating when the sealing valve seat comes into contact with the spherical valve core, potentially leading to decreased adjustment accuracy or failure of the sealing valve. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a sealing valve seat and its airtightness testing fixture.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A sealing valve seat includes a body made of PEEK material, the body being hollow and forming a flow channel, and the outer periphery of the body forming a sealing area and a rebound area, a sealing ring being embedded in the sealing area, and an elastic ring being sleeved on the rebound area.

[0007] Preferably, the elastic ring includes an engaging elastic contraction portion and a sealing portion, wherein the sealing portion extends radially along the main body and the elastic contraction portion extends axially along the main body. Through the above improvements, the sealing portion can abut against the inner wall of the sealing valve body and cooperate with the sealing ring to achieve secondary sealing, thereby further improving the sealing performance. Furthermore, the elastic contraction portion can abut against the sealing valve body, thereby giving the sealing valve seat a certain elastic force to avoid excessively tight contact with the spherical valve core, which would prevent the spherical valve core from rotating.

[0008] Preferably, a reinforcing ring is embedded in the elastic ring. The reinforcing ring includes a ring body and a reinforcing protrusion extending along the main body axis. The ring body is embedded in the sealing part, and the reinforcing protrusion is embedded in the elastic contraction part. With the above improvements, as the elastic ring is continuously compressed, conventional elastic rings are prone to cracking at the joint between the elastic contraction part and the sealing part, which leads to the failure of the elastic ring. The reinforcing ring can increase the structural strength of the joint between the elastic contraction part and the sealing part, thereby significantly improving the service life of the elastic ring.

[0009] Preferably, a positioning protrusion is formed on the rebound area, and a positioning groove is formed on the inner wall of the elastic ring for the positioning protrusion to be inserted. With the above improvements, when the elastic ring is sleeved on the main body, the positioning protrusion will be inserted into the positioning groove, thereby ensuring the reliability of the elastic ring installation and preventing the elastic ring from detaching from the main body.

[0010] Preferably, the outer diameter of the sealing part is larger than the outer diameter of the sealing ring. Through the above improvements, the sealing between the sealing part and the valve body is guaranteed. If leakage occurs between the sealing ring and the valve body, the sealing part abuts against the valve body to perform a second seal, thereby ensuring the sealing performance.

[0011] Preferably, a positioning post is provided on the rebound area, and an insertion groove for inserting the positioning post is formed on the reinforcing ring. Through the above improvements, the positioning post is inserted into the insertion groove, thereby achieving rapid positioning of the reinforcing ring and preventing the reinforcing ring from rotating.

[0012] Preferably, the output end of the flow channel forms an arc-shaped rotating surface. Through the above improvements, the smoothness of the spherical valve core during rotation is enhanced.

[0013] An airtightness testing fixture includes a machine base, a sealing test seat disposed on the machine base, and a sealing abutment block that is lifted and lowered on the machine base. An air inlet groove is formed on the sealing test seat, and a sealing valve seat is inserted into the air inlet groove. A spherical sealing valve core is disposed on the sealing abutment block. When the sealing abutment block abuts against the sealing test seat, the spherical sealing valve core abuts against the sealing valve seat. A sealing test space is formed between the sealing abutment block and the sealing test seat. An air outlet channel is formed within the sealing test seat, connecting to the sealing test space. An airtightness testing unit is connected to the air outlet channel.

[0014] Preferably, the sealing abutment block has an insertion groove, the spherical sealing valve core is inserted into the insertion groove, and an elastic element is provided in the insertion groove. The elastic element abuts against the spherical sealing valve core so that the spherical sealing valve core always has a downward movement tendency. Through the above improvement, the elastic element acts on the spherical sealing valve core, so that it has a downward movement tendency, avoiding excessive force when the spherical sealing valve core squeezes the sealing valve seat, which would cause damage to the sealing valve seat.

[0015] Preferably, the sealing test seat is provided with a sealing groove, and a sealing ring is provided in the sealing groove, and the sealing abutment block abuts against the sealing ring. Through the above improvements, the sealing performance when the sealing abutment block abuts against the sealing test seat is improved, and air leakage in the sealing test space is avoided.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] The main body is made of PEEK material to improve the wear resistance of the entire sealing valve seat, thereby preventing wear of the sealing valve seat when the ball valve core rotates in contact with it. A sealing area and a rebound area are formed on the outer periphery of the main body. A sealing ring is embedded in the sealing area, and an elastic ring is fitted on the rebound area. The sealing ring can ensure the sealing between the sealing valve seat and the valve body, and the elastic ring can give the entire sealing valve seat a certain elasticity to prevent the sealing valve seat from abutting too tightly with the ball valve core, which would prevent the ball valve core from rotating and thus reduce the adjustment accuracy of the sealing valve or cause it to fail. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is a schematic diagram of the integral sealing valve seat of this utility model;

[0020] Figure 3 This is a cross-sectional view of the integral sealing valve seat of this utility model;

[0021] Figure 4 This is an exploded view of the integral sealing valve seat of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the airtightness testing fixture of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of the sealing abutment block of this utility model;

[0024] Figure 7 This is a cross-sectional view of the overall structure of the sealing test seat of this utility model;

[0025] In the diagram: 1. Main body; 2. Flow channel; 3. Sealing area; 4. Rebound area; 5. Sealing ring; 6. Elastic ring; 1.1 Elastic contraction part; 1.2 Sealing part; 1.3 Reinforcing ring; 2.1 Ring body; 2.2 Reinforcing protrusion; 3.1 Positioning post; 3.2 Positioning groove; 3.3 Insertion groove; 3.4 Arc-shaped rotating surface; 3.5 Positioning protrusion; 4.1 Machine base; 4.2 Sealing test seat; 4.3 Sealing abutment block; 4.4 Air inlet groove; 4.5 Spherical sealing valve core; 4.6 Air outlet channel; 4.7 Air tightness test unit; 5.1 Insertion groove; 5.2 Elastic element; 5.3 Sealing groove; 5.4 Sealing ring; 5.5 Pressure regulating block; Detailed Implementation

[0026] 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.

[0027] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0028] like Figure 1-4 As shown, a sealing valve seat includes a body 1 made of PEEK material. The body 1 is hollow and forms a flow channel 2. The outer periphery of the body 1 forms a sealing area 3 and a rebound area 4. A sealing ring 5 is embedded in the sealing area 3, and an elastic ring 6 is sleeved on the rebound area 4.

[0029] The main body 1 is made of PEEK material. PEEK (polyether ether ketone) material is known for its excellent wear resistance, especially in high temperature, high load and harsh environment. This improves the wear resistance of the entire sealing seat, thereby avoiding wear of the sealing seat when the ball valve core and the sealing seat are in contact and rotate.

[0030] In addition, a sealing area 3 and a rebound area 4 are provided on the outer periphery of the main body 1. A sealing ring 5 is embedded in the sealing area 3, and an elastic ring 6 is fitted on the rebound area 4. The sealing ring 5 can ensure the sealing between the sealing valve seat and the valve body, and the elastic ring 6 can make the entire sealing valve seat have a certain elastic force to avoid the sealing valve seat and the ball valve core being too tightly pressed together, causing the ball valve core to be unable to rotate, thereby causing the sealing valve adjustment accuracy to decrease or fail.

[0031] As a further explanation of the specific structure of the elastic ring 6, the elastic ring 6 includes an engaging elastic contraction portion 1.1 and a sealing portion 1.2, with the sealing portion 1.2 extending radially along the body 1 and the elastic contraction portion 1.1 extending axially along the body 1.

[0032] Specifically, when the sealing valve seat is installed in the valve body of the sealing valve, the sealing part 1.2 can abut against the inner wall of the sealing valve body and cooperate with the sealing ring 5 to achieve secondary sealing, thereby further improving the sealing performance of the sealing valve. In addition, the elastic contraction part 1.1 can abut against the valve body of the sealing valve, so that the sealing valve seat has a certain elastic force to avoid abutting the ball valve core too tightly, which would prevent the ball valve core from rotating.

[0033] Furthermore, a reinforcing ring 1.3 is embedded in the elastic ring 6. The reinforcing ring 1.3 includes a ring body 2.1 and a reinforcing protrusion 2.2 extending along the axial direction of the main body 1. The ring body 2.1 is embedded in the sealing part 1.2, and the reinforcing protrusion 2.2 is embedded in the elastic contraction part 1.1.

[0034] During the use of the sealing valve seat, as the elastic ring 6 is continuously compressed, the conventional elastic ring 6 is prone to cracking at the joint between the elastic contraction part 1.1 and the sealing part 1.2, which leads to the failure of the elastic ring 6. The reinforcing ring 1.3 can increase the structural strength of the joint between the elastic contraction part 1.1 and the sealing part 1.2, thereby significantly improving the service life of the elastic ring 6.

[0035] Among them, the elastic ring 6 is made of silicone rubber or TPU material, which not only ensures the sealing performance of the sealing part 1.2, but also ensures the elasticity of the elastic contraction part 1.1.

[0036] Preferably, a positioning protrusion is formed on the rebound area 4, and a positioning groove 3.2 is formed on the inner wall of the elastic ring 6 for the positioning protrusion to be inserted. When installing the elastic ring 6, the positioning protrusion can be inserted into the positioning groove 3.2 to achieve quick installation of the elastic ring 6 and ensure the reliability of the installation of the elastic ring 6, and prevent the elastic ring 6 from detaching from the main body 1.

[0037] Preferably, the outer diameter of the sealing part 1.2 is larger than the outer diameter of the sealing ring 5 to ensure the seal between the sealing part 1.2 and the valve body. If leakage occurs between the sealing ring 5.4 and the valve body, the sealing part 1.2 abuts against the valve body to perform a second seal, thereby ensuring the sealing performance.

[0038] Preferably, a positioning post 3.1 is provided on the rebound area 4, and an insertion groove 3.3 is formed on the reinforcing ring 1.3 for the positioning post 3.1 to be inserted. The positioning post 3.1 is inserted into the insertion groove 3.3, thereby realizing the rapid positioning of the reinforcing ring 1.3 and preventing the reinforcing ring 1.3 from rotating.

[0039] In some other embodiments, the output end of the flow channel 2 forms an arc-shaped rotating surface 3.4 to improve the smoothness of the spherical valve core when it rotates.

[0040] like Figures 5 to 7 As shown, an airtightness testing fixture includes a machine base 4.1, a sealing test seat 4.2 mounted on the machine base 4.1, and a sealing abutment block 4.3 lifted and mounted on the machine base 4.1. An air inlet groove 4.4 is formed on the sealing test seat 4.2, and a sealing valve seat is inserted into the air inlet groove 4.4. A spherical sealing valve core 4.5 is mounted on the sealing abutment block 4.3. When the sealing abutment block 4.3 abuts against the sealing test seat 4.2, the spherical sealing valve core 4.5 abuts against the sealing valve seat. A sealing test space is formed between the sealing abutment block 4.3 and the sealing test seat 4.2. An air outlet channel 4.6 is formed within the sealing test seat 4.2, connecting to the sealing test space. An airtightness testing unit 4.7 is connected to the air outlet channel 4.6.

[0041] Throughout the test, the air inlet slot 4.4 is connected to an air inlet pipe, which allows air to pass through the air inlet slot 4.4. When the sealing block 4.3 abuts against the sealing test seat 4.2, the spherical sealing valve core 4.5 abuts against the sealing valve seat, and a sealing test space is formed between the sealing block 4.3 and the sealing test seat 4.2. If an air gap occurs between the spherical sealing valve core 4.5 and the sealing valve seat, or between the sealing valve seat and the air inlet slot 4.4, gas will enter the sealing test space through the gap and be discharged through the air outlet channel 4.6. At this time, the air tightness test unit 4.7 can detect the leakage to determine the sealing condition of the sealing valve seat.

[0042] Furthermore, a insertion groove 5.1 is formed on the sealing abutment block 4.3, and the spherical sealing valve core 4.5 is inserted into the insertion groove 5.1. An elastic element 5.2 is provided in the insertion groove 5.1. The elastic element 5.2 abuts against the spherical sealing valve core 4.5. The elastic element 5.2 acts on the spherical sealing valve core 4.5, so that it has a downward movement tendency, avoiding excessive force when the spherical sealing valve core 4.5 squeezes the sealing valve seat, which would cause damage to the sealing valve seat.

[0043] Preferably, the sealing test seat 4.2 is provided with a sealing groove 5.3, and a sealing ring 5.4 is provided in the sealing groove 5.3. The sealing abutment block 4.3 abuts against the sealing ring 5.4, which improves the sealing performance when the sealing abutment block 4.3 abuts against the sealing test seat 4.2 and avoids air leakage in the sealing test space.

[0044] Preferably, a pressure regulating block is screwed onto the insertion slot 5.1. The pressure regulating block can be rotated to adjust its up and down position, thereby controlling the elastic force of the elastic element 5.2 and changing the contact force of the spherical sealing valve core 4.5 to test the sealing performance under different pressures.

[0045] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A sealing valve seat, characterized in that, The body (1) is made of PEEK material. The body (1) is hollow and forms a flow channel (2). The outer periphery of the body (1) forms a sealing area (3) and a rebound area (4). A sealing ring (5) is embedded in the sealing area (3). An elastic ring (6) is fitted on the rebound area (4).

2. A sealing valve seat according to claim 1, characterized in that: The elastic ring (6) includes an engaged elastic contraction portion (1.1) and a sealing portion (1.2), wherein the sealing portion (1.2) extends radially along the body (1) and the elastic contraction portion (1.1) extends axially along the body (1).

3. A sealing valve seat according to claim 2, characterized in that: The elastic ring (6) is fitted with a reinforcing ring (1.3), which includes a ring body (2.1) and a reinforcing protrusion (2.2) extending along the axial direction of the main body (1). The ring body (2.1) is embedded in the sealing part (1.2), and the reinforcing protrusion (2.2) is embedded in the elastic contraction part (1.1).

4. A sealing valve seat according to claim 1, characterized in that: A positioning protrusion (3.5) is formed on the rebound area (4), and a positioning groove (3.2) for the positioning protrusion (3.5) to be inserted is formed on the inner wall of the elastic ring (6).

5. A sealing valve seat according to claim 2, characterized in that: The outer diameter of the sealing part (1.2) is larger than the outer diameter of the sealing ring (5).

6. A sealing valve seat according to claim 3, characterized in that: The rebound area (4) is provided with a positioning post (3.1), and the reinforcing ring (1.3) is provided with an insertion groove (3.3) for the positioning post (3.1) to be inserted.

7. A sealing valve seat according to claim 1, characterized in that: The output end of the flow channel (2) forms an arc-shaped rotating surface (3.4).

8. An airtightness testing fixture, comprising the sealing valve seat as described in any one of claims 1 to 7, characterized in that, The system includes a machine base (4.1), on which a sealing test seat (4.2) is provided, and a sealing abutment block (4.3) is lifted and mounted on the machine base (4.1). An air inlet groove (4.4) is formed on the sealing test seat (4.2), and a sealing valve seat is inserted into the air inlet groove (4.4). A spherical sealing valve core (4.5) is provided on the sealing abutment block (4.3). When the sealing abutment block (4.3) abuts against the sealing test seat (4.2), the spherical sealing valve core (4.5) abuts against the sealing valve seat. A sealing test space is formed between the sealing abutment block (4.3) and the sealing test seat (4.2). An air outlet channel (4.6) is formed in the sealing test seat (4.2) to connect the sealing test space. An airtightness test unit (4.7) is connected to the air outlet channel (4.6).

9. The airtightness testing fixture according to claim 8, characterized in that, The sealing abutment block (4.3) has an insertion groove (5.1) formed therein, the spherical sealing valve core (4.5) is inserted into the insertion groove (5.1), and an elastic element (5.2) is provided in the insertion groove (5.1). The elastic element (5.2) abuts against the spherical sealing valve core (4.5) so that the spherical sealing valve core (4.5) always has a downward movement tendency.

10. The airtightness testing fixture according to claim 8, characterized in that, The sealing test seat (4.2) is provided with a sealing groove (5.3), and a sealing ring (5.4) is provided in the sealing groove (5.3), and the sealing abutment block (4.3) abuts against the sealing ring (5.4).

Images