Large-drift-diameter valve special for gas

Abstract

The utility model discloses a large-drift-diameter valve special for gas, which comprises a valve body, a valve core and a spring seat are arranged in the valve body, a pressure spring is arranged in the spring seat, and the valve core is sleeved in the pressure spring; the upper end of the valve element is limited through the valve body, and the lower end is limited through the spring seat. The spring and the valve element are arranged in the valve body, and the valve element and the valve body can be sealed through the elastic force of the pressure spring; when external force is applied to the valve element, the compression spring is compressed, the sealing function of the valve element and the valve body is eliminated, a gas channel is formed in the valve body, the gas inflation or gas supplementation function of power equipment is achieved, and when the external force is removed, the compression spring is reset, so that the valve element and the valve body are sealed, gas is sealed in the equipment and the gas channel, and the self-sealing function is achieved. The large-drift-diameter valve special for the gas can be applied to gas inflation and gas supplementation of electrical equipment, and compared with an existing valve, the valve is reliable in sealing, large in ventilation capacity and high in gas inflation speed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage electrical equipment, in particular to a large-diameter special valve for gas. Background Art

[0002] Sulfur hexafluoride (SF6) gas or a SF6 / nitrogen mixture is a safe and effective insulating and arc-extinguishing medium that is increasingly being used in various high-voltage electrical equipment and gas-insulated transmission lines (GIL). GIL enables the relocation of overhead lines underground, aligning with the direction of urban transformation and development. With the future explosion of 5G and new energy vehicles, higher requirements are being placed on urban power transmission technology. Traditional transmission technologies are unable to meet urban electricity demand. GIL offers advantages such as greater safety and greater capacity, and holds promising industry development prospects. In addition to its application in urban underground pipeline corridors, GIL is also being used in hydropower stations and nuclear power plants.

[0003] The valves used for inflation and air replenishment of existing high-voltage electrical equipment are all small-diameter valves. Inflation, air replenishment and air release are time-consuming and labor-intensive. In order to improve the efficiency of inflation and discharge, equipment manufacturers increase the number of valves, but at the same time increase the number of leakage points in the equipment, resulting in reduced sealing reliability. Utility Model Content

[0004] In view of the above-mentioned defects or shortcomings, the purpose of the present utility model is to provide a large-diameter gas-specific valve.

[0005] In order to achieve the above objectives, the technical solution of the utility model is:

[0006] A large-diameter gas-specific valve comprises: a valve body, a valve core and a spring seat installed in the valve body, a compression spring installed in the spring seat, and the valve core sleeved in the compression spring; the upper end of the valve core is limited by the valve body, and the lower end is limited by the spring seat, an air flow channel is provided at the end of the valve core, and a vent is correspondingly provided on the spring seat.

[0007] The valve core includes: a skeleton, an upper guide column is provided at the upper end of the skeleton; a shoulder shaft is provided in the middle of the skeleton, and the shoulder shaft is engaged and limited with the inner table surface of the valve body; an upper limit platform is provided at the bottom of the skeleton, and a lower guide column is provided on the upper limit platform, and the upper limit platform is engaged and limited with the spring seat, and the lower guide column passes through the center of the spring seat.

[0008] A rubber ring for sealing is installed on the shoulder shaft of the skeleton.

[0009] The shoulder shaft is provided with a rubber-wrapped area, the rubber ring is clamped and installed in the rubber-wrapped area, and the rubber-wrapped area is provided with a Farr line.

[0010] The spring seat is provided with a compression spring placement groove, the top of the spring seat is provided with a lower guide platform matched with the upper guide column, and the bottom of the spring seat is provided with a retaining ring limiting platform engaged with the valve body.

[0011] The spring seat is circumferentially provided with a plurality of large vent holes and small vent holes.

[0012] The number of the large vent holes and the number of the small vent holes are both 4.

[0013] An air flow channel is provided on the top of the frame, and the number of the air flow channels is three fan-shaped holes with a radius of 30 mm.

[0014] A retaining ring is provided between the valve body and the spring seat.

[0015] An O-type sealing ring is provided at the bottom of the valve body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model provides a large-diameter gas-only valve, in which a spring and a valve core are provided in the valve body, and the elastic force of the compression spring can be used to seal the valve core and the valve body; when an external force is applied to the valve core, the compression spring is compressed, the sealing function of the valve core and the valve body is eliminated, and a gas channel is formed inside the valve body, thereby realizing the inflation or air replenishment function of the power equipment; when the external force is removed, the compression spring is reset, thereby sealing between the valve core and the valve body, and sealing the gas in the equipment and the gas channel, thereby realizing the self-sealing function. The large-diameter gas-only valve of the utility model can be used for inflation and air replenishment of power equipment, can be used for quick connection and disconnection between SF6 inflation equipment, and can also be used for other similar occasions and pressure systems of non-corrosive gas media. Compared with existing valves, the valve has reliable sealing, larger ventilation volume, and faster inflation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model large-diameter gas-specific valve;

[0019] Figure 2 This is the structure diagram of the valve core of the utility model's large-diameter gas-specific valve;

[0020] Figure 3 This is a top view of the valve core of the utility model's large-diameter gas-specific valve;

[0021] Figure 4 This is an enlarged view of the valve core A of the utility model's large-diameter gas-specific valve;

[0022] Figure 5 This is a structural diagram of the spring seat of the utility model's large-diameter gas-specific valve;

[0023] Figure 6It is a bottom view of the utility model large-diameter gas-specific valve.

[0024] In the figure, 1 is the valve body; 2 is the valve core; 3 is the compression spring; 4 is the spring seat; 5 is the retaining ring; 6 is the O-ring; 7 is the frame; 8 is the rubber ring; 9 is the upper limit platform; 10 is the lower guide column; 11 is the upper guide column; 12 is the Far line; 13 is the lower guide platform; 14 is the compression spring placement groove; 15 is the retaining ring limit platform; 16 is the large vent hole; 17 is the small vent hole; 18 is the shoulder shaft; 19 is the air flow channel. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0026] like Figure 1 As shown, the utility model provides a large-diameter gas-specific valve, including: a valve body 1, a valve core 2 and a spring seat 4 are installed in the valve body 1, a compression spring 3 is installed in the spring seat 4, and the valve core 2 is sleeved in the compression spring 3; the upper end of the valve core 2 is limited by the valve body 1, and the lower end is limited by the spring seat 4, a retaining ring 5 is provided between the valve body 1 and the spring seat 4, an O-ring 6 is provided at the bottom of the valve body 1, an air flow channel 19 is provided at the upper end of the valve core 2, and a vent hole is correspondingly provided on the spring seat 4.

[0027] like Figure 2 、 3 As shown, the valve core 2 comprises a skeleton 7, with an upper guide post 11 disposed at its upper end; a shoulder shaft 18 disposed in the middle of the skeleton 7, which engages with the inner surface of the valve body 1 for position limiting; an upper limit platform 9 disposed at the bottom of the skeleton 7, on which a lower guide post 10 is disposed, which engages with the spring seat 4 for position limiting, and the lower guide post 10 passes through the center of the spring seat 4. During the opening and closing process, the upper and lower guide posts 11 and 10 cooperate with the spring seat 4 and the valve body 1 to ensure that they remain coaxial with the valve body during the valve opening and closing process, thereby improving the sealing reliability of the valve.

[0028] like Figure 4As shown, a rubber ring 8 for sealing is installed on the shoulder shaft 18 of the skeleton 7. The shoulder shaft 18 is provided with a rubber-enclosed area, and the rubber ring 8 is mounted in the rubber-enclosed area. The rubber-enclosed area is provided with a Far line 12 to enhance the bonding effect between the rubber ring 8 and the skeleton 7 in this area and improve the sealing effect of the valve. Exemplarily, the rubber ring 8 is bonded to the skeleton 7 using a vulcanization process. The rubber parameters are specified by the technical requirements. After the rubber ring 8 is formed, its surface is a bevel that meets the requirements. It contacts the conical sealing surface of the valve body to form a line seal, ensuring the airtightness of the valve.

[0029] like Figure 5 As shown, the spring seat 4 is provided with a compression spring placement groove 14. The top of the spring seat 4 is provided with a lower guide platform 13 that cooperates with the upper guide column 11. The bottom of the spring seat 4 is provided with a retaining ring limit platform 15 that engages with the valve body 1. The upper limit platform 9 and the lower limit platform 13 provided on the spring seat 4 control the maximum stroke of the valve core 2. The compression spring 3 has reasonable performance parameters. After assembly and compression, it ensures that a certain force is applied to the valve core 2 to ensure a reliable seal between the valve core 2 and the valve body 1, ensuring the airtightness of the valve requires an SF6 gas leakage rate of ≤1×10 -15 MPa·m 3 / s.

[0030] like Figure 6 As shown, the spring seat 4 is circumferentially provided with a plurality of large vent holes 16 and small vent holes 17. For example, the number of the large vent holes 16 and the number of the small vent holes 17 are both 4.

[0031] Furthermore, an air flow channel 19 is provided on the top of the skeleton 7. The number of the air flow channels 19 is three fan-shaped holes with a radius of 30 mm, that is, 3-R30 is provided on the skeleton 1, which is an air flow channel.

[0032] The working process and principle of this utility model are as follows:

[0033] The valve core 2 is installed in the hole of the valve body 1. One end of the compression spring 3 is stuck in the compression spring placement groove 14, and the other end is stuck on the outer diameter of the valve core 2. The spring seat 4 is fixed by the retaining ring 5 stuck in the retaining ring groove of the valve body 1. When the compression spring 3 is compressed, it exerts an upward thrust on the valve core 2. The rubber 8 on the valve core 2 contacts and compresses the conical sealing surface of the valve body 2, and the valve self-seals. The lower guide post 10 of the valve core 2 is always inserted into the hole of the spring seat 4. The outer diameter of the lower guide post 10 and the inner hole of the spring seat 4 are designed with reasonable matching parameters. The upper guide post 11 of the valve core 2 always matches the inner hole of the upper end of the valve body 1, and reasonable and standardized matching parameters are selected to ensure that the valve core 2 does not deviate when moving up and down. The utility model utilizes the elastic force of the compression spring 3 to seal the valve core 2 and the valve body 1; when an external force is applied to the valve core 2, the compression spring is compressed, the sealing function of the valve core 2 and the valve body 1 is eliminated, and a gas channel is formed inside the valve body 1, thereby realizing the function of inflating or replenishing air for the power equipment; when the external force is removed, the compression spring 3 is reset, thereby sealing between the valve core 2 and the valve body 1, and sealing the gas in the equipment and the gas channel, thereby realizing the self-sealing function.

[0034] When the equipment is inflated or deflated through the valve, the valve is connected to the conversion joint (or inflation connector), and the valve core 2 moves downward relative to the valve body 1 under the action of external force. The rubber 8 separates from the conical surface of the inner hole of the valve body 1, that is, the valve is opened, the gas channel is connected, the upper limit platform 9 contacts the lower limit platform 13, the valve core 2 is mechanically limited and cannot move further downward, and the compression spring 3 is protected to avoid affecting its elastic coefficient due to excessive compression. Moreover, it greatly reduces the occurrence of inflation difficulties caused by valves produced by different manufacturers and the mismatch of spring parameters at both ends of the self-sealing inflation connector.

[0035] When the inflation or air replenishment is completed, the conversion joint (or inflation connector) is removed, the valve core 2 is reset under the action of the rebound force of the compression spring 3, and the valve is sealed.

[0036] The valve of the utility model has a large flow area and reasonable design parameters of each component, so that the maximum stroke of the valve, the coaxiality during the switching process, and the maximum opening force of the valve are all reasonably standardized; in addition, the valve core is designed with a Farnell line and a reasonable cone angle difference, and the sealing is reliable; the new valve core adopts a rubber vulcanization process, so that the rubber and the valve core frame are tightly and reliably combined and will not fall off; the assembly efficiency is improved, and the influence of differences in operator skills on the valve sealing performance is avoided.

[0037] For those skilled in the art, it is obvious that the above-mentioned specific examples are only preferred embodiments of the present invention. Therefore, any improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and still achieve the purpose of the present invention, and all fall within the scope of protection of the present invention.

Claims

1. A large-diameter gas-specific valve, characterized in that: include: A valve body (1), wherein a valve core (2) and a spring seat (4) are installed in the valve body (1), a compression spring (3) is installed in the spring seat (4), and the valve core (2) is sleeved in the compression spring (3); the upper end of the valve core (2) is limited by the valve body (1), and the lower end is limited by the spring seat (4); an air flow channel (19) is provided at the upper end of the valve core (2), and a vent hole is correspondingly provided on the spring seat (4); the valve core (2) comprises: a skeleton (7), wherein an upper guide column (11) is provided at the upper end of the skeleton (7); a shoulder shaft (18) is provided in the middle of the skeleton (7), and the shoulder shaft (18) is engaged with the inner surface of the valve body (1) for limiting position; an upper limit table is provided at the bottom of the skeleton (7) (9), a lower guide column (10) is provided on the upper limit platform (9), the upper limit platform (9) is engaged with the spring seat (4) for limiting, and the lower guide column (10) passes through the center of the spring seat (4); a rubber ring (8) for sealing is installed on the shoulder shaft (18); a compression spring placement groove (14) is provided on the spring seat (4), a lower guide platform (13) matched with the upper guide column (11) is provided on the top of the spring seat (4), and a retaining ring limiting platform (15) engaged with the valve body (1) for limiting is provided at the bottom of the spring seat (4); a rubber-wrapped area is provided on the shoulder shaft (18), the rubber ring (8) is engaged and installed in the rubber-wrapped area, and the rubber-wrapped area is provided with a Far line (12).

2. The large-diameter gas-specific valve according to claim 1, characterized in that: The vent holes include: a plurality of large vent holes (16) and small vent holes (17) circumferentially arranged on the spring seat (4).

3. The large-diameter gas-specific valve according to claim 2, characterized in that: The number of the large vent holes (16) and the number of the small vent holes (17) are both 4.

4. The large-diameter gas-specific valve according to claim 1, characterized in that: The air flow channel (19) is arranged at the top of the frame (7), and the number of the air flow channel (19) is three fan-shaped holes with a radius of 30 mm.

5. The large-diameter gas-only valve according to claim 1, characterized in that: A retaining ring (5) is provided between the valve body (1) and the spring seat (4).

6. The large-diameter gas-only valve according to claim 1, characterized in that: An O-type sealing ring (6) is provided at the bottom of the valve body (1).

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