WO2021120343A1

WO2021120343A1 - Valve core and charging valve

Info

Publication number: WO2021120343A1
Application number: PCT/CN2020/070380
Authority: WO
Inventors: 孙鹏; 钟礼宝; 赵文青; 邱得恩
Original assignee: 高密同创气门芯有限公司
Priority date: 2019-12-20
Filing date: 2020-01-06
Publication date: 2021-06-24
Also published as: CN211693660U

Abstract

Disclosed are a valve core and a charging valve. The valve core comprises a core body (1), wherein the core body (1) is provided with a through hole inner cavity for supplying air circulation; a core rod (3), wherein the core rod (3) is arranged in the through hole inner cavity, and is capable of moving in an axial direction of the through hole inner cavity; a sealing step (31), which is arranged at a first end of the core rod (3) extending out of the core body (1), wherein the sealing step (3) is configured to open or close the through hole inner cavity; and a sealing ring (5), wherein the sealing ring (5) is arranged between an end surface of a first end of the core body (1) and the sealing step (31), a plurality of sealing parts are arranged on a stressed surface, directly opposite the sealing step (31) at an interval, of the sealing ring (5), and the plurality of sealing parts are configured to abut against the sealing step (31) when the sealing step (31) closes the through hole inner cavity, such that the through hole inner cavity is sealed.

Description

Valve core and filling valve

This application claims the priority of the Chinese patent application whose application date is December 20, 2019 and the application number is 201922314572.8. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the technical field of valve cores, for example, to a valve core and a filling valve.

Background technique

The valve core is a component used for fluid charging and needs to withstand high pressure during operation. Take the _{valve core for CO 2} refrigerant charging in an air conditioning system as an example. The CO ₂ refrigerant requires a higher working pressure and is a refrigerant in related technologies. 6-8 times, this requires the air-conditioning system to work stably in a high-pressure environment. In terms of parts and components, as a key component for refrigerant charging and sealing in air conditioning systems, the valve core of the charging valve must undoubtedly meet this requirement.

However, in the related art, due to the limitation of structural design, during high-pressure inflation, the gasket at the bottom of the valve core of the filling valve is easily blown or blown off, causing the valve core to fail. In the high-pressure airtight process, because the gas pressure is relatively high and the force-receiving surface of the sealing end is not easy to be elastically deformed, the gasket is susceptible to excessive compression and loses its elasticity, resulting in failure of the sealing structure. Therefore, the valve core and charging valve in the related art are difficult to operate reliably under high pressure conditions, which limits the application of CO ₂ refrigerant in air conditioning systems.

Summary of the invention

The application provides a valve core and a filling valve, which can operate reliably under high pressure conditions.

An embodiment provides a valve core, including:

A core body, the core body is provided with a through hole inner cavity for gas circulation;

A core rod, the core rod is arranged in the inner cavity of the through hole and can move along the axial direction of the inner cavity of the through hole;

A sealing step is arranged at the first end of the core rod extending from the core body, and the sealing step is arranged to open or close the inner cavity of the through hole;

The sealing ring is arranged between the end surface of the first end of the core and the sealing step, and a plurality of seals are arranged at intervals on the force receiving surface directly opposite to the sealing step A plurality of the sealing parts are configured to abut against the sealing step when the sealing step closes the inner cavity of the through hole, so as to seal the inner cavity of the through hole.

An embodiment provides a filling valve including the valve core as described above.

The application provides a valve core and a filling valve. In the valve core, a core rod that moves axially along the inner cavity of the through hole is arranged in the inner cavity of the through hole of the core body. A sealing step is arranged on the core rod, and the sealing step is arranged to open or close the inner cavity of the through hole to control the circulation and blocking of the gas. The valve core is also provided with a sealing ring, and a sealing portion is provided on the force-receiving surface of the sealing ring facing the sealing step for abutting against the sealing step when the inner cavity of the through hole is closed, so as to seal the inner cavity of the through hole. When the inner cavity of the through hole is opened, since the sealing ring is arranged between the end surface of the first end of the core and the sealing step, it will not directly face the air flow out of the inner cavity of the through hole, so the sealing ring is less impacted and difficult to It can be blown off or broken to ensure the reliability of the sealing structure during high-pressure inflation. When the inner cavity of the through hole is closed, since the sealing part of the sealing ring is provided in multiples, multiple seals can be formed, and the multiple sealing parts can support each other, which enhances the sealing performance and can prevent the sealing ring from being excessively compressed. The loss of elasticity leads to the failure of the sealing structure, which ensures the reliability of the sealing structure during high-pressure sealing. At the same time, a plurality of sealing parts are arranged at intervals, and a predetermined volume of space can be formed between two adjacent sealing parts to accommodate the deformation of the sealing part, which can avoid the occurrence of excessively large transverse area of the sealing ring and the inability to transmit the compression deformation, resulting in sealing The raised or wrinkled end of the ring reduces the sealing performance of the sealing ring, which ensures the reliability of the sealing structure.

Description of the drawings

Fig. 1 is a schematic structural diagram of a valve core provided by an embodiment;

Figure 2 is a partial structural diagram of a valve core provided by an embodiment;

Fig. 3 is a structural schematic diagram of a valve core provided by an embodiment in an inflated state;

Fig. 4 is a schematic structural diagram of a valve core provided in an embodiment in a closed state.

In the picture:

1. Core body; 11. Positioning step; 12. Limit groove; 2. Core cap; 3. Core rod; 31. Sealing step; 4. Elastic part; 5. Seal ring; 51. First sealing edge; 511. 512, the second sealing part; 52, the second sealing edge; 53, the installation step; 54, the protrusion; 6. the valve body.

Detailed ways

In the description of this application, unless expressly stipulated and limited otherwise, the terms "connected", "connected", and "fixed" shall be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrated. ; It can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in this application can be understood under specific circumstances.

In this application, unless expressly stipulated and defined otherwise, the "on" or "under" of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them. Moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature directly above and obliquely above the second feature, or it simply means that the first feature is higher in level than the second feature. The “below”, “below” and “below” of the second feature of the first feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this embodiment, the terms "upper", "lower", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for ease of description and simplified operations. It does not indicate or imply that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only used to distinguish them in description, and have no special meaning.

This embodiment provides a valve core. As shown in FIG. 1, the valve core includes a core body 1, a core rod 3 and a sealing ring 5. Wherein, the core 1 is provided with a through-hole cavity for gas circulation. The core rod 3 is arranged in the cavity of the through hole and can move along the axial direction of the cavity of the through hole. A sealing step 31 is provided at one end of the core rod 3. The sealing step 31 is arranged to extend out of the first end of the core 1 and is arranged to open or close the inner cavity of the through hole to control the circulation and blocking of the gas. The sealing ring 5 is arranged between the end surface of the first end of the core 1 and the sealing step 31, and a plurality of sealing parts are arranged at intervals on the force receiving surface of the sealing ring 5 that is directly opposite to the sealing step 31. It is arranged to abut against the sealing step 31 when the sealing step 31 closes the inner cavity of the through hole to seal the inner cavity of the through hole.

In the high-pressure inflation state, since the air flow flows out through the cavity of the through hole, and the sealing ring 5 does not face the cavity of the through hole, when the cavity of the through hole is opened, the sealing ring 5 will not face the air flow and will not be affected by the air flow. The impact. Therefore, the sealing ring 5 is not easily blown or blown off, and the reliability of the sealing structure can be ensured. When the inner cavity of the through hole is closed and the valve core is in a high-pressure airtight state, since the sealing ring 5 is pressed, the multiple sealing parts all abut the sealing step 31, so the multiple sealing parts can form multiple seals. The parts can support each other, which enhances the sealing performance, and can prevent the sealing ring 5 from being excessively compressed and losing elasticity to cause the sealing structure to fail, ensuring the reliability of the sealing structure. At the same time, a plurality of sealing parts are arranged at intervals, and a predetermined volume of space can be formed between two adjacent sealing parts to accommodate the deformation of the sealing part, so as to avoid the occurrence of excessively large lateral area of the sealing ring 5 and the inability to transmit the compression deformation, resulting in sealing The bulge or wrinkle at the end of the ring 5 reduces the sealing performance of the sealing ring 5, which ensures the reliability of the sealing structure. In this embodiment, a plurality of sealing parts are arranged at intervals, and the space formed between two adjacent sealing parts is a groove structure.

Since the core rod 3 occupies the space of the through hole cavity, as shown in Figure 1, the radial dimension of the through hole cavity in this embodiment is larger than the rod diameter of the core rod 3, so that the through hole cavity and the core rod There is a preset gap between 3, so that the gas can still circulate through the cavity of the through hole.

Optionally, the size of the sealing step 31 on the core rod 3 is larger than the size of the inner cavity of the through hole, thereby facilitating the capping of the inner cavity of the through hole from the end of the core body 1 to realize the closure of the inner cavity of the through hole.

Optionally, the sealing ring 5 is sleeved on the first end of the core 1. In this embodiment, as shown in Figure 2, the sealing ring 5 is an L-shaped sealing ring, including a first sealing edge 51 and a second sealing edge 52. The first sealing edge 51 is arranged on the end face of the first end of the core 1 and Between the sealing steps 31, a plurality of sealing parts are arranged on the first sealing edge 51, and the second sealing edge 52 is arranged along the circumferential direction of the first end of the core 1. According to this arrangement, the sealing ring 5 can be conveniently sleeved and installed on the first end of the core body 1, and a good seal can be ensured. A positioning step 11 is provided at one end of the core 1, and the sealing ring 5 can be sleeved on the positioning step 11. At the same time, a mounting step 53 is formed at the corner of the L-shaped sealing ring 5, and the sealing ring 5 can be clamped with the core 1 by the cooperation of the mounting step 53 and the positioning step 11 to form a good positioning.

In this embodiment, two sealing parts are provided on the first sealing edge 51, namely, a first sealing part 511 and a second sealing part 512. Both the first sealing portion 511 and the second sealing portion 512 are configured as annular sealing portions. When the sealing step 31 is in contact with the core 1 through the sealing ring 5 to seal the inner cavity of the through hole, the first sealing portion 511 and the second sealing portion 512 both abut the sealing step 31, and the two sealing portions can not only be mutually Support, and can form a double-layer seal to enhance the sealing effect. In this embodiment, the sealing ring 5 is set as a rubber sealing ring, which has good elasticity and is easy to process.

Optionally, the end of each sealing part of the sealing ring 5 that is in contact with the sealing step 31 is set in a circular arc structure, so as to avoid that the initial contact area between the sealing part and the sealing step 31 is too large and the amount of compression deformation cannot be transmitted. , Resulting in bulging or wrinkles at the end of the sealing ring 5, which reduces the sealing performance of the sealing ring 5. As shown in FIG. 2, in this embodiment, the end portions of the first sealing portion 511 and the second sealing portion 512 that are in contact with the sealing step 31 are set in this structure. In addition, compared with a flat structure, when the sealing step 31 seals the through hole cavity by squeezing the sealing ring 5, the arc-shaped structure is easier to maintain good contact with the sealing step 31 after deformation, thereby improving the reliability of the seal. Sex.

Exemplarily, as shown in FIG. 2, a limiting groove 12 is provided on the end surface of the first end of the core body 1, and the sealing ring 5 is provided with a protrusion 54 that cooperates with the limiting groove 12. In this embodiment, the protrusion 54 is disposed on the side of the first sealing portion 511 close to the positioning step 11 and can be embedded in the limiting groove 12. According to this arrangement, precise positioning of the sealing ring 5 on the core 1 can be realized. At the same time, due to the restriction of the restricted groove 12, the first sealing portion 511 will not move randomly along the radial direction of the sealing ring 5 when it is squeezed, thereby making the overall structure more stable.

Optionally, as shown in FIG. 1, the valve core further includes a core cap 2 which is buckled on the second end of the core body 1 to prevent foreign matter from falling into the cavity of the through hole. In this embodiment, the core cap 2 is provided with a through hole communicating with the inner cavity of the through hole, and the core rod 3 passes through the through hole of the core cap 2 and is installed in the through hole inner cavity.

Optionally, as shown in FIG. 1, the valve core further includes an elastic member 4 that drives the core rod 3 to reset. In this embodiment, the elastic member 4 is a spring. The upper end of the core rod 3 is provided with a limit ring, and the elastic member 4 is sleeved on the core rod 3 and is located between the limit ring on the core rod 3 and the upper end surface of the core cap 2. When the valve core is sealed, the inner cavity of the through hole is closed, the sealing step 31 abuts the sealing ring 5, and the core rod 3 is in the initial position as shown in FIG. 4. When the valve core is inflated, the inner cavity of the through hole opens. As shown in FIG. 3, the core rod 3 moves along the axial direction of the inner cavity of the through hole and leaves the starting position, and the elastic member 4 is compressed. After the inflation is completed, since the elastic member 4 will stretch, the elastic member 4 will drive the core rod 3 back to the initial position.

This embodiment also provides a filling valve including the valve core as described above, which can operate reliably under high pressure conditions.

Optionally, as shown in FIGS. 3 and 4, the filling valve further includes a valve body 6, on which a stepped hole is provided, and the valve core is installed in the stepped hole. In this embodiment, the step hole of the valve body 6 includes a threaded hole and a light hole. A thread is provided on the outside of the core cap 2 of the valve core to cooperate with the threaded hole, thereby facilitating the installation of the valve core into the stepped hole. The second sealing edge 52 of the sealing ring 5 closely fits with the light hole, so as to ensure the sealing between the valve core and the valve body 6.

The following takes the inflation and closing state of the valve core as an example to describe the operation of the valve core in the filling valve in this embodiment.

As shown in Figure 3, when the valve core is in an inflated state, under the action of the gas pressure P1, the core rod 3 will move downward along the axial direction of the inner cavity of the through hole, so that the sealing step 31 is away from the end of the core body 1. Thereby, the cavity of the through hole is opened, and the gas flows into the gas system along the cavity of the through hole. At this time, since the sealing ring 5 is sleeved on the end of the core 1, the sealing ring 5 will not directly face the air flow out of the cavity of the through hole, and the impact is relatively small, and it is difficult to be blown off or broken. It can ensure the reliability of valve core operation. At the same time, during the inflation process, the second sealing edge 52 in the sealing ring 5 always closely adheres to the inner wall of the light hole in the valve body 6 to ensure a good seal between the valve core and the valve body 6.

After the inflation is completed, as shown in Figure 4, under the action of the elastic member 4, the core rod 3 will move upward along the axial direction of the inner cavity of the through hole, so that the sealing step 31 is close to the end of the core 1 and is connected to the sealing ring 5. The multiple sealing parts abut against each other, so that the valve core enters a closed state and maintains a good seal.

When the valve core is in the closed state, as shown in FIG. 4, under the action of the internal pressure P2 of the air consumption system, the sealing step 31 will squeeze the sealing ring 5, causing the sealing ring 5 to be elastically deformed. Since the first sealing part 511 and the second sealing part 512 of the sealing ring 5 are in contact with the sealing step 31, multiple seals can be formed, and the two sealing parts can support each other, which enhances the sealing performance and can avoid The sealing ring 5 is over-compressed and loses its elasticity, resulting in failure of the sealing structure, which ensures the reliability of the sealing structure. At the same time, the two sealing parts are arranged at intervals, and a groove is formed between the two sealing parts, which can provide space for the elastic deformation of the two sealing parts, and can avoid the occurrence of excessively large lateral area of the sealing ring 5, and the compression deformation cannot be transmitted. , Resulting in the problem of protrusions or wrinkles at the end of the sealing ring 5, which reduces the sealing performance of the sealing ring 5, and ensures the reliability of the sealing structure. In addition, due to the restriction of the restricted groove 12, the first sealing portion 511 will not move randomly along the radial direction of the sealing ring 5, and the overall structure is relatively stable.

In this embodiment, when the valve core is in the closed state, the second sealing edge 52 in the sealing ring 5 will also be compressed and expand along the radial direction of the valve core, so as to be closer to the inner wall of the light hole in the valve body 6 Ground fit to ensure the sealing effect.

To sum up, this embodiment, by reasonably designing the structure of the valve core, ensures that the valve core and the filling valve including the valve core can operate reliably under high pressure conditions.

Claims

A valve core, including:

A core body (1), the core body (1) is provided with a through-hole cavity for air flow;

A core rod (3), the core rod (3) is arranged in the inner cavity of the through hole and can move along the axial direction of the inner cavity of the through hole;

A sealing step (31) is arranged at the first end of the core rod (3) protruding from the core body (1), and the sealing step (31) is arranged to open or close the inner cavity of the through hole;

The sealing ring (5), the sealing ring (5) is arranged between the end surface of the first end of the core body (1) and the sealing step (31), and the sealing ring (5) is connected to the A plurality of sealing parts are arranged on the force-receiving surface of the sealing step (31) at intervals, and the plurality of sealing parts are configured to interact with the sealing step when the sealing step (31) closes the inner cavity of the through hole. (31) Abutting to seal the inner cavity of the through hole.
The valve core according to claim 1, wherein the end of each of the sealing portions that contacts the sealing step (31) is provided in a circular arc structure.
The valve core according to claim 1, wherein the size of the sealing step (31) is larger than the size of the inner cavity of the through hole.
The valve core according to claim 1, wherein a limiting groove (12) is provided on the end surface of the first end of the core body (1), and the sealing ring (5) is provided with the limiting groove (12) Mating protrusions (54).
The valve core according to claim 1, wherein the sealing ring (5) is sleeved on the first end of the core body (1).
The valve core according to claim 5, wherein the sealing ring (5) is an L-shaped sealing ring, comprising a first sealing edge (51) and a second sealing edge (52), the first sealing edge (51) ) Is arranged between the end surface of the first end of the core (1) and the sealing step (31), a plurality of the sealing parts are arranged on the first sealing edge (51), and the second The sealing edge (52) is arranged along the circumferential direction of the first end of the core body (1).
The valve core according to claim 1, further comprising a core cap (2), and the core cap (2) is buckled on the second end of the core body (1).
The valve core according to claim 1, further comprising an elastic member (4) configured to drive the core rod (3) to reset.
A filling valve comprising the valve core according to any one of claims 1-8.
The filling valve according to claim 9, further comprising a valve body (6) provided with a stepped hole, and the valve core is installed in the stepped hole.