CN214617864U

CN214617864U - Floating type piston structure for high-temperature pneumatic control valve and high-temperature pneumatic control valve

Info

Publication number: CN214617864U
Application number: CN202120645296.8U
Authority: CN
Inventors: 贺锐; 李朝晖
Original assignee: Qingdao High Flyer Air Valve Co ltd
Current assignee: Qingdao High Flyer Air Valve Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-11-05
Anticipated expiration: 2031-03-30

Abstract

The utility model relates to a gas accuse valve technical field, in particular to a floating piston structure and high temperature gas accuse valve for high temperature gas accuse valve. The valve rod is fixedly connected with the center of the spring cover, and the spring is sleeved on the spring cover and stretches along with the movement of the valve rod; the piston and the spring cover are connected in an abutting mode. The high-temperature pneumatic control valve with the floating piston structure further comprises a cylinder body used for containing the piston structure, a valve body arranged at the lower end of the cylinder body and used for controlling the circulation of a medium, and a connecting part arranged between the cylinder body and the valve body. The utility model discloses simple structure, use and easy maintenance, low in manufacturing cost, life is longer.

Description

Floating type piston structure for high-temperature pneumatic control valve and high-temperature pneumatic control valve

Technical Field

The utility model relates to a gas accuse valve technical field, in particular to a floating piston structure and high temperature gas accuse valve for high temperature gas accuse valve.

Background

In a control system for the vulcanization of rubber tires by nitrogen and steam, a pneumatic control valve is required in the pipe to control the flow of the medium. The medium in the rubber tire industry has the characteristic of high temperature, so the used pneumatic control valve needs to have the characteristic of high temperature resistance, and various high temperature resistant designs need to be made for the pneumatic control valve.

At present, many pneumatic control valves on the market have the defects of short service life, high manufacturing cost, difficult maintenance and the like, and one important reason is the current fixed piston structure. The characteristics of long valve rod, large number of parts and the like of the pneumatic control valve lead the coaxiality of the pneumatic control valve to be difficult to control, thus leading the sealing ring of the cylinder body to be easy to skew and aggravating abrasion. In order to ensure the whole coaxiality of the pneumatic control valve, the coaxiality of the valve rod needs to be strictly controlled, the valve rod of the pneumatic control valve is long, and the cost is high by controlling the coaxiality. If the cylinder body sealing ring of the pneumatic control valve is damaged and needs to be replaced, the cylinder body sealing ring is difficult to maintain under the existing fixed piston structure, the whole piston needs to be dismounted, the replacement of the cylinder body sealing ring can be completed, and the shutdown time is long.

Therefore, a piston structure and a high-temperature pneumatic control valve which have long service life, low cost and easily replaced sealing rings are needed.

Disclosure of Invention

Not enough to prior art exists, the utility model provides a floating piston structure and high temperature gas accuse valve for high temperature gas accuse valve to solve the technical problem who mentions in the background art.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a floating type piston structure for a high-temperature pneumatic control valve comprises a piston arranged in an airtight container, a spring cover arranged at the lower end of the piston, a valve rod fixedly connected with the center of the spring cover, and a spring sleeved on the spring cover and stretching along with the movement of the valve rod;

the piston and the spring cover are connected in an abutting mode.

Furthermore, one side of the spring cover, which is in contact with the piston, is provided with a first groove, and one end of the valve rod penetrates through the spring cover and extends into the first groove.

Furthermore, a second groove is formed in one side, which is in contact with the spring cover, of the piston.

Further, a seal ring is provided on the outer peripheral side of the piston for increasing the sealing property between the piston and the airtight container.

Furthermore, an extension part for clamping and fixing the spring is arranged on the outer peripheral side of the spring cover.

Furthermore, the valve rod and the spring cover are fixed through a self-locking nut.

The utility model discloses still include a high temperature gas accuse valve that has floating piston structure, still including the cylinder body that is used for holding piston structure, locate the valve body that the cylinder body lower extreme is used for the control medium circulation to and locate the connecting portion between cylinder body and the valve body.

Further, one end of the valve rod extends out of the cylinder body and extends into the valve body.

Furthermore, the cylinder body is provided with an air inlet and outlet hole which is connected with an external air source.

Furthermore, a medium channel is arranged in the valve body, and a valve ball for opening and closing the medium channel is arranged on the valve rod.

The utility model discloses a floating piston structure and high temperature gas accuse valve for high temperature gas accuse valve's beneficial effect is:

the utility model discloses a butt between piston and the spring housing makes the piston structure floating, and the sealing washer is difficult crooked, can alleviate the wearing and tearing of sealing washer in the cylinder body, and the while is because of not direct contact between valve rod and the piston again, consequently can reduce the heat on the sealing washer in the medium transmission cylinder body in the valve body, can prolong valve life, and the setting of floating piston structure need not the axiality of accurate control valve rod, and is not high to the machining precision requirement of valve rod, reduces manufacturing cost. In case the sealing washer needs to be changed, need not dismantle the nut on the valve rod and also can change, convenient maintenance.

The utility model discloses simple structure, use and easy maintenance, low in manufacturing cost, life is longer.

Drawings

Fig. 1 is a schematic sectional structure diagram of embodiment 1 of the present invention;

fig. 2 is a schematic sectional structure diagram of embodiment 2 of the present invention;

FIG. 3 is a schematic cross-sectional view of the prior art of the present invention;

the components in the drawings are numbered as follows:

the valve comprises a cylinder body 1, a valve body 2, a connecting part 3, an air inlet and outlet hole 4, a medium channel 5, a piston 6, a sealing ring 7, a spring cover 8, a first groove 9, a second groove 10, a valve rod 11, a self-locking nut 12, a spring 13, an extending part 14, a valve ball 15, a mounting hole 16, a valve rod sleeve 17 and a circulating part 20.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments;

example 1:

as shown in fig. 1 and 3, the high-temperature pneumatic control valve with the floating piston structure comprises the floating piston structure, a cylinder body 1 for accommodating the piston structure, a valve body 2 arranged at the lower end of the cylinder body 1 and used for controlling the circulation of a medium, and a connecting part 3 arranged between the cylinder body 1 and the valve body 2. And the cylinder body 1 is provided with an air inlet and outlet hole 4 which is connected with an external air source. A medium channel 5 is arranged in the valve body 2.

The floating piston structure comprises a piston 6 arranged in a cylinder body 1, wherein a sealing ring 7 is arranged on the outer peripheral side of the piston 6 and used for increasing the sealing property between the piston 6 and the cylinder body 1. The lower end of the piston 6 is provided with a spring cover 8, the piston 6 and the spring cover 8 are connected in an abutting mode, and a first groove 9 is formed in one side, in contact with the piston 6, of the spring cover 8. And a second groove 10 is formed in one side of the piston 6, which is in contact with the spring cover 8. The center of the spring cover 8 is fixedly connected with a valve rod 11, and the valve rod 11 and the spring cover 8 are fixed through a self-locking nut 12. One end of the valve rod 11 penetrates through the spring cover 8 and extends into the first groove 9. The other end of the valve rod 11 extends out of the cylinder body 1 and extends into the valve body 2. The spring cover 8 is sleeved with a spring 13 which stretches along with the movement of the valve rod 11; the outer peripheral side of the spring cover 8 is provided with an extension portion 14 for retaining the spring 13. The valve rod 11 is provided with a valve ball 15 for opening and closing the medium channel 5.

Traditional high temperature gas accuse valve among the prior art at present is as shown in fig. 3, what adopt is fixed piston, and valve rod 11 passes through the nut with piston 6 and fixes as an organic whole, when changing sealing washer 7, need to part valve rod 11 and piston 6, just removable, in addition because of valve rod 11 is fixed as an organic whole with piston 6 again, consequently to valve rod 11 and other parts's fineness requirement height, just can guarantee the higher axiality of valve rod 11, and then guarantee that piston 6 does not take place crooked, reduce the wearing and tearing of sealing washer.

The structure of the utility model is as shown in figure 1:

the spring cover 8 is fixed on the valve rod 11 through the self-locking nut 12, the sealing ring 7 is assembled on the piston 6, the piston 6 and the spring cover 8 are only in contact connection and are not fixedly connected, and therefore the piston 6 has a degree of freedom in the vertical direction. When the external air source is inflated, the piston 6 moves downwards under the action of air pressure, when the external air source is deflated, the piston 6 returns under the elastic force of the spring 13, once the parts such as the spring cover 8, the valve rod 11 and the like are inclined, the piston 6 is not fixed on the valve rod 11, so that the piston 6 cannot be inclined in the action process, and can be automatically aligned under the thrust of the external air source, and the abrasion of the sealing ring 7 is small.

The working condition temperature of the high-temperature pneumatic control valve is higher, and due to the arrangement of the first groove 9 and the second groove 10, the piston 6 is not in direct contact with the valve rod 11, the heat of the medium in the valve body 2 is less transferred to the sealing ring 7, the service life of the sealing ring 7 is prolonged, and the service life of the whole valve is prolonged. Valve rod 11 is longer in the high temperature gas accuse valve in fig. 3, and the degree of difficulty of control axiality is got up in processing is very big, and the cost is higher, and the utility model discloses in, because piston 6 can automatic alignment, do not need valve rod 11 to have very high axiality to the cost is reduced.

Because the operating mode of high temperature gas accuse valve is comparatively abominable, and the maintenance is comparatively frequent, and wherein sealing washer 7 is changed very frequently, the utility model discloses well change sealing washer 7 need not be like fixed piston, need unscrew the nut from valve rod 11, only need unscrew cylinder body 1 and let the back take out piston 6 and just can change sealing washer 7.

Example 2:

as shown in fig. 2, the same parts of this embodiment as those of embodiment 1 are not described again, but the differences are:

the valve rod 11 is provided with a mounting hole 16 penetrating through the valve rod 11, the direction of the mounting hole 16 is vertical to the axial direction of the valve rod 11, and the connecting part comprises a valve rod sleeve 17 which is sleeved outside the valve rod 11 and fixed between the valve rod 11 and the cylinder body 1; is fixed between the cylinder body 1 and the valve body 2, and the valve rod sleeve 17 is arranged inside the fixed sleeve. Two round holes corresponding to the two ends of the mounting hole 16 are arranged on the side wall of the valve rod sleeve 17. The fixed sleeve is provided with a window for observing the mounting hole 16 and the round hole.

The valve stem 11 is provided with a flow passage 20 having a reduced diameter. The flow part 20 is provided in the medium passage 5 to increase the medium flow rate.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a floating piston structure for high temperature gas accuse valve which characterized in that: the valve rod is fixedly connected with the center of the spring cover, and the spring is sleeved on the spring cover and stretches along with the movement of the valve rod;

the piston and the spring cover are connected in an abutting mode.

2. A floating piston structure for a high temperature pneumatic controlled valve as claimed in claim 1, characterized by: one side of the spring cover contacting with the piston is provided with a first groove, and one end of the valve rod penetrates through the spring cover and extends into the first groove.

3. A floating piston structure for a high temperature pneumatic controlled valve as claimed in claim 1, characterized by: and a second groove is formed in one side of the piston, which is in contact with the spring cover.

4. A floating piston structure for a high temperature pneumatic controlled valve as claimed in claim 1, characterized by: and a sealing ring is arranged on the outer peripheral side of the piston and used for increasing the sealing property between the piston and the airtight container.

5. A floating piston structure for a high temperature pneumatic controlled valve as claimed in claim 1, characterized by: and an extension part for clamping and fixing the spring is arranged on the peripheral side of the spring cover.

6. A floating piston structure for a high temperature pneumatic controlled valve as claimed in claim 1, characterized by: the valve rod and the spring cover are fixed through a self-locking nut.

7. A high temperature pneumatic control valve comprising a floating piston structure as claimed in any one of claims 1 to 6, characterized in that: the piston valve further comprises a cylinder body used for accommodating the piston structure, a valve body arranged at the lower end of the cylinder body and used for controlling the circulation of a medium, and a connecting part arranged between the cylinder body and the valve body.

8. A high temperature pneumatic control valve according to claim 7, wherein: one end of the valve rod extends out of the cylinder body and extends into the valve body.

9. A high temperature pneumatic control valve according to claim 7, wherein: and the cylinder body is provided with an air inlet and outlet hole which is connected with an external air source.

10. A high temperature pneumatic control valve according to claim 7, wherein: the valve body is internally provided with a medium channel, and the valve rod is provided with a valve ball for opening and closing the medium channel.