CN202302013U

CN202302013U - Throttle valve

Info

Publication number: CN202302013U
Application number: CN201120380884XU
Authority: CN
Inventors: 孙敬东
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-08
Filing date: 2011-10-08
Publication date: 2012-07-04
Anticipated expiration: 2021-10-08

Abstract

The utility model relates to a throttle valve, which comprises a valve body, a valve cap, a valve rod and a valve core, wherein the valve cap is connected and fixed with the valve body, the center of the valve cap is provided with the valve rod, the lower end of the valve rod is provided with the valve core, the valve core upwards and downwards moves along with the rotation of the valve rod and forms the sealed connection with an inner cavity of the valve body, a valve cover is arranged at the upper end of the valve rod, the valve cover is sheathed on the valve rod and can drive the valve rod to rotate, the end part of the valve core is in a spherical surface structure, the inner cavity of the valve body is correspondingly provided with a concave surface structure matched with the end part of the valve core, wear resistance nitriding layers are arranged on the surfaces of the concave surface structure and the end part of the valve core, and the lower end of the valve cover is near the upper surface of the valve cap. Compared with the prior art, the throttle valve has the advantages that the upper end of the valve rod is provided with the valve cover, impurities and the like cannot easily enter screw threads of the valve rod, the wear resistance nitriding layers are arranged on the contact surface of the inner cavity of the valve body and the valve core, and the abrasion is not easy to occur after long time use, so the service life of the throttle valve is prolonged. The throttle valve has the advantages that the structure is compact, the service life is long, and the sealing effect is good.

Description

A kind of throttle valve

Technical field

The utility model relates to throttle valve, the throttle valve of especially a kind of good sealing effect, long service life.

Background technique

Existing throttle valve generally is made up of valve body, valve gap, valve rod, handwheel and spool; Said valve gap is connected with valve seal and fixes; The valve gap center is equipped with valve rod, and the lower end of valve rod is equipped with spool, and spool is located between the import and outlet of valve body; Spool can rotate with valve rod and move up and down, and is tightly connected with body cavity formation.At present, outside the valve rod of existing throttle valve and the surface of contact of valve gap often are exposed to, there is impurity to get in the screw thread of valve rod easily, influences the sealing of valve rod; On the other hand, the surface of contact of spool and body cavity also weares and teares because of long-term the use easily, thereby influences the working life of throttle valve.

The model utility content

To the deficiency of above existing throttle valve, the purpose of the utility model provides a kind of valve rod upper end and has valve bonnet, the throttle valve of long service life, good sealing effect.

The purpose of the utility model realizes through adopting following technological scheme:

Throttle valve comprises valve body, valve gap, valve rod and spool, and said valve gap is connected with valve body and fixes; The valve gap center is provided with valve rod, and the lower end of valve rod is provided with spool, and spool is located between the import and outlet of valve body; Spool can rotate to move up and down and to form with body cavity and be tightly connected with valve rod; Said valve rod and valve gap flexibly connect through screw thread, and the valve rod upper end is provided with valve bonnet, and valve bonnet is set on the valve rod and can drives valve rod and rotates.

As the optimal technical scheme of the utility model, said valve body import and valve outlet coaxial line.

As the optimal technical scheme of the utility model, the end of said spool is made as spheric structure, and body cavity is corresponding to be provided with and the suitable concave structure in spool end.

As the optimal technical scheme of the utility model, the end of said spool and the surface of said concave structure are provided with wear-resisting carburized case.

As the optimal technical scheme of the utility model, the lower end of said valve bonnet is near the upper surface of valve gap.

As the optimal technical scheme of the utility model, the import of said valve body and outlet are respectively equipped with the flange fillet.

The beneficial effect of the utility model is: with respect to existing technology; The upper end of the utility model valve rod has valve bonnet, and in the screw thread of difficult entering valve rod such as impurity, the surface of contact of spool and body cavity is provided with wear-resisting carburized case; Long-term use is not easy to wear yet, thus the working life of having improved throttle valve.The utility model compact structure, long service life, good sealing effect.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further:

Fig. 1 is the structural representation of the utility model.

Embodiment

As shown in Figure 1, throttle valve comprises valve body 1, valve gap 2, valve rod 3 and spool 5; Said valve gap 2 is tightly connected with valve body 1 and fixes, and valve gap 2 centers are provided with valve rod 3, and the lower end of valve rod 3 is provided with spool 5; Spool 5 is located at the import 11 of valve body and exports between 12, and spool 5 can rotate to move up and down and form with body cavity and be tightly connected with valve rod 5, and said valve rod 3 flexibly connects through screw thread with valve gap 2; Valve rod 3 upper ends are provided with valve bonnet 4, and valve bonnet 4 is set on the valve rod 3 and can drives valve rod 3 and rotates.

In the present embodiment; Said valve body import 11 and valve outlet 12 coaxial lines; The end of said spool 5 is made as spheric structure, and body cavity is corresponding to be provided with the concave structure 6 suitable with the spool end, and the surface of the end of spool 5 and said concave structure 6 is provided with wear-resisting carburized case.The lower end of the said valve bonnet 4 of present embodiment is near the upper surface of valve gap 2, and the import 11 of said valve body is respectively equipped with flange fillet 13 with outlet 12.

Claims

1. a throttle valve comprises valve body, valve gap, valve rod and spool, and said valve gap is connected with valve body and fixes; The valve gap center is provided with valve rod, and the lower end of valve rod is provided with spool, and spool is located between the import and outlet of valve body; Spool can rotate to move up and down and to form with body cavity and be tightly connected with valve rod; It is characterized in that: said valve rod and valve gap flexibly connect through screw thread, and the valve rod upper end is provided with valve bonnet, and valve bonnet is set on the valve rod and can drives valve rod and rotates.

2. throttle valve according to claim 1 is characterized in that: said valve body import and valve outlet coaxial line.

3. throttle valve according to claim 2 is characterized in that: the end of said spool is made as spheric structure, and body cavity is corresponding to be provided with and the suitable concave structure in spool end.

4. throttle valve according to claim 3 is characterized in that: the end of said spool and the surface of said concave structure are provided with wear-resisting carburized case.

5. throttle valve according to claim 1 is characterized in that: the lower end of said valve bonnet is near the upper surface of valve gap.

6. throttle valve according to claim 1 is characterized in that: the import of said valve body and outlet are respectively equipped with the flange fillet.