CN219452952U - High temperature resistant ball valve - Google Patents

Abstract

The utility model provides a high-temperature-resistant ball valve, and belongs to the technical field of ball valves. The ball valve solves the technical problem that the high-temperature sealing performance of the existing ball valve is insufficient. The utility model provides a high temperature resistant ball valve, includes spiro union complex valve body and valve cap, the valve body orientation the terminal surface of one end of valve cap is laminated with the terminal surface of valve cap and is supported, its characterized in that, this terminal surface of valve body still has around arranging around circumference and is annular step groove, have on the bottom surface of step groove around circumference and arrange annular bead, the terminal surface of valve cap has annular boss, the boss insert locate in the step inslot and with annular bead is supported mutually and is leaned on. The utility model is beneficial to ensuring the high-temperature tightness of the ball valve.

Description

High temperature resistant ball valve

Technical Field

The utility model belongs to the technical field of ball valves, and relates to a high-temperature-resistant ball valve.

Background

The ball valve is a valve which drives the opening and closing piece to rotate around the axis of the valve rod through the valve rod, is mainly used for cutting off or connecting a medium in a pipeline, can also be used for adjusting and controlling fluid, and is widely used in various control pipelines. The threaded connection between the bonnet of the ball valve and the valve body is often coated with a sealant for sealing the gap between the two. When the ball valve passes through a high-temperature medium, the sealing effect of the sealing glue is poor after the sealing glue is heated, and the sealing ring arranged at the valve core is made of plastic or rubber and other materials, so that the sealing glue is easy to expand when heated, and an acting force for outwards moving the valve cap is applied. At this time, the seal between the body and the valve cap on the ball valve is very easy to lose efficacy, the ball valve leaks, and normal use is affected

Therefore, the patent of the publication No. CN202992322U discloses a ball valve, which comprises a valve body, a valve core and a valve rod, wherein the valve core and the valve rod are arranged in the valve body, the inner end of the valve rod is fixedly connected with the valve core in the circumferential direction, the outer end of the valve rod extends out of the valve body and is fixedly connected with a handle, the valve body comprises a body with a water inlet and a cylindrical valve cap which is in threaded connection with the water outlet end of the body, the valve core is positioned at the inner side of the water outlet end of the body and the side wall of the valve core abuts against the inner end of the valve cap, a sealing glue is arranged at the threaded connection part between the valve cap and the body, an annular shoulder is further arranged on the side wall of the valve cap, and a sealing structure capable of forming a hard seal is arranged between the shoulder and the end of the water outlet end of the body.

The ball valve has high reliability in a high-temperature environment, but whether the shoulder and the end part of the water outlet end are assembled in place or not is difficult to accurately judge, and the sealing effect is also affected due to insufficient sealing performance caused by unsealing in place or damage of the shoulder caused by excessive extrusion.

Disclosure of Invention

The utility model aims at the problems existing in the prior art, and provides a high-temperature-resistant ball valve, which aims at solving the technical problems that: the existing ball valve has insufficient high-temperature sealing performance.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a high temperature resistant ball valve, includes spiro union complex valve body and valve cap, the valve body orientation the terminal surface laminating of one end terminal surface of valve cap is supported and is leaned on with the terminal surface laminating of valve cap, its characterized in that, this end terminal surface of valve body still has around arranging circumferentially and is annular step groove, have on the bottom surface of step groove around the annular bead that the circumference was arranged, the terminal surface of valve cap has annular boss, the boss insert locate in the step inslot and with annular bead is propped against mutually.

The valve body is a working main body of the ball valve, and the valve cap is in threaded fit with the valve body and tightly pushes up the components in the valve body, so that the assembly effect of the components in the valve body is ensured, and good tightness is realized; through set up annular step groove at the terminal surface of valve body towards the valve cap, set up around the annular bead of circumference arrangement at step tank bottom, make the boss insert locate the step inslot and with annular bead roof, like this when the valve body is with the partial terminal surface laminating of valve cap, the boss is propped mutually with annular bead, the annular bead of surface has produced certain deformation and is propped with the boss terminal surface and is formed hard seal this moment, and the valve body also forms certain sealedly with the partial terminal surface laminating of valve cap simultaneously, and guarantee that annular bead can not be pressed excessively, when whole ball valve receives high temperature to influence, even screw thread glue seal between valve cap and the valve body is inefficacy, hard seal department still can keep sufficient leakproofness, guarantee the high temperature leakproofness of ball valve.

In the high-temperature-resistant ball valve, the annular convex edges are arranged at intervals with the inner side walls of the step grooves along the radial direction. Thus, the annular convex edge can be smoothly deformed when the screw feeding is subjected to the pressure of the boss, and the sealing effect is ensured.

In the high-temperature-resistant ball valve, the annular convex edge is positioned at the edge of the bottom surface of the step groove. Thus, the annular rib is favorable for providing more sufficient deformation space for the annular rib, and the effect of propping and sealing the annular rib is ensured.

In the high-temperature-resistant ball valve, the edge of the annular convex edge propped against the boss is subjected to fillet transition treatment. Thus, the laminating degree of the annular convex edge and the boss surface is improved, and the surface structures of the valve body and the valve cover are protected while the hard sealing performance is ensured.

In the high-temperature-resistant ball valve, the valve body is provided with the valve hole, the valve rod for controlling the opening and closing of the ball valve is inserted in the valve hole, the periphery of the valve rod is sleeved with the sealing ring, the sealing ring is a PTFE material piece, and the periphery of the sealing ring is in sealing abutting connection with the inner wall of the valve hole. The PTFE material piece has excellent temperature resistance, can keep stable sealing characteristics in high-temperature and low-temperature environments, and further ensures the sealing effect between the valve rod and the valve body.

In the high-temperature-resistant ball valve, the outer periphery of the valve rod is provided with the annular groove which is arranged around the axis, the inner wall of the valve hole is provided with the annular edge which is in limiting abutting joint with the valve rod along the axial direction of the valve rod, the position of the annular groove is opposite to that of the annular edge, and the sealing ring is positioned in the annular groove and the outer periphery of the sealing ring is in abutting joint with the inner edge surface of the annular edge. The sealing ring is arranged in the annular groove and is in sealing fit with the inner edge of the annular edge, so that the friction torque of the sealing ring during rotation of the valve rod can be reduced while the sealing effect is guaranteed, and the ball valve is stable and convenient to operate.

Compared with the prior art, the utility model has the following advantages:

when the valve body is attached to the end face of the valve body, the boss abuts against the annular convex edge, at the moment, the annular convex edge on the surface abuts against the end face of the boss to form hard seal, and meanwhile, the valve body is attached to the end face of the valve body, at the same time, the valve body is attached to the end face of the valve body, the annular convex edge is prevented from being excessively pressed, when the whole ball valve is affected by high temperature, even if the seal of the threaded glue between the valve body and the valve body fails, the hard seal still can keep enough tightness, and the high-temperature tightness of the ball valve is guaranteed.

Drawings

Fig. 1 is a schematic perspective view of the present embodiment.

Fig. 2 is a schematic cross-sectional structure of the present embodiment.

Fig. 3 is an enlarged view of a portion a in fig. 2.

In the figure, 1, a valve body; 11. a step groove; 111. annular rib; 12. a valve hole; 121. a rim;

4. and (3) sealing rings.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-3, the high temperature resistant ball valve comprises a valve body 1 and a valve cap 2 which are in threaded connection and matched, wherein one end face of the valve body 1, facing the valve cap 2, is abutted against the end face of the valve cap 2, the end face of the valve body 1 is also provided with a step groove 11 which is annular in circumferential arrangement, the bottom surface of the step groove 11 is provided with an annular convex rib 111 which is annular in circumferential arrangement, the end face of the valve cap 2 is provided with an annular boss 21, and the boss 21 is inserted into the step groove 11 and abutted against the annular convex rib 111. The valve body 1 is a working main body of the ball valve, the valve cap 2 is in threaded fit with the valve body 1 and tightly pushes up parts in the valve body 1, so that the assembly effect of all the parts in the valve body 1 is ensured, and meanwhile, good tightness is realized; through setting up annular step groove 11 at the terminal surface of valve body 1 towards valve cap 2, set up around the annular bead 111 of circumference arrangement in step groove 11 bottom surface, make boss 21 insert locate in step groove 11 and with annular bead 111 roof-against, when valve body 1 and the partial terminal surface laminating of valve cap 2 like this, boss 21 and annular bead 111 roof-against mutually, surface annular bead 111 has produced certain deformation and boss 21 terminal surface roof-against and forms the hard seal this moment, and the partial terminal surface laminating of valve body 1 and valve cap 2 also forms certain seal simultaneously, and guarantee annular bead 111 can not be pressed excessively, when whole ball valve receives high temperature influence, even screw thread glue seal between valve cap 2 and the valve body 1 loses efficacy, the hard seal department still can keep sufficient leakproofness, guarantee the high temperature leakproofness of ball valve. Specifically, the annular rib 111 is disposed radially spaced from the inner side wall of the stepped groove 11. This is advantageous in ensuring that the annular rib 111 is smoothly deformed when the screw feed is pressed by the boss 21, and ensuring the sealing effect. Preferably, the annular rib 111 is located at the edge of the bottom surface of the stepped groove 11. This is advantageous in providing a more sufficient deformation space for the annular rib 111 and ensuring the sealing effect of the annular rib 111 against. The edge of the annular convex edge 111 propped against the boss 21 is subjected to fillet transition treatment. Thus, the fit degree of the annular convex edge 111 and the surface of the boss 21 is improved, and the surface structures of the valve body 1 and the valve cover are protected while the hard sealing performance is ensured.

As shown in fig. 2, the valve body 1 is provided with a valve hole 12, a valve rod 3 for controlling the opening and closing of the ball valve is inserted in the valve hole 12, a sealing ring 4 is sleeved on the periphery of the valve rod 3, the sealing ring 4 is a modified PTFE material piece, and the periphery of the sealing ring 4 is in sealing abutting joint with the inner wall of the valve hole 12. The PTFE material piece has excellent temperature resistance, can maintain stable sealing characteristics in high-temperature and low-temperature environments, and further ensures the sealing effect between the valve rod 3 and the valve body 1. The outer periphery of the valve rod 3 is provided with an annular groove 31 which is arranged around the axis, the inner wall of the valve hole 12 is provided with an annular edge 121 which is in limiting abutting joint with the valve rod 3 along the axial direction of the valve rod 3, the annular groove 31 is opposite to the annular edge 121, and the sealing ring 4 is positioned in the annular groove 31 and the outer periphery abuts against the inner edge surface of the annular edge 121. The sealing ring 4 is arranged in the annular groove 31 and is in sealing fit with the inner edge of the annular edge 121, so that the friction torque of the sealing ring 4 during rotation of the valve rod 3 can be reduced while the sealing effect is guaranteed, and the ball valve is stable and convenient to operate. The valve hole 12 is embedded with carbon fiber filler sleeved on the periphery of the valve rod 3.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (6)

1. The utility model provides a high temperature resistant ball valve, includes spiro union complex valve body (1) and valve cap (2), valve body (1) orientation the terminal surface laminating of one end terminal surface and valve cap (2) of valve cap (2) is supported, its characterized in that, this terminal surface of valve body (1) still has around circumference and arranges and be annular step groove (11), have on the bottom surface of step groove (11) around circumference annular bead (111) of arranging, the terminal surface of valve cap (2) has annular boss (21), boss (21) are inserted and are located in step groove (11) and with annular bead (111) are propped against mutually.

2. The high temperature resistant ball valve according to claim 1, wherein the annular rib (111) is arranged radially spaced from the inner side wall of the step groove (11).

3. The high temperature resistant ball valve according to claim 2, wherein the annular rib (111) is located at the edge of the bottom surface of the step groove (11).

4. A high temperature resistant ball valve according to claim 1, 2 or 3, characterized in that the edge of the annular bead (111) against the boss (21) is rounded.

5. A high temperature resistant ball valve according to claim 1, 2 or 3, wherein the valve body (1) is provided with a valve hole (12), a valve rod (3) for controlling the opening and closing of the ball valve is inserted in the valve hole (12), a sealing ring (4) is sleeved on the periphery of the valve rod (3), the sealing ring (4) is made of a PTFE material, and the periphery of the sealing ring (4) is in sealing abutting connection with the inner wall of the valve hole (12).

6. The high temperature resistant ball valve according to claim 5, wherein the outer periphery of the valve rod (3) is provided with a ring groove (31) which is arranged around an axis, the inner wall of the valve hole (12) is provided with a ring edge (121) which is in limit abutting with the valve rod (3) along the axial direction of the valve rod (3), the ring groove (31) is opposite to the ring edge (121), and the sealing ring (4) is positioned in the ring groove (31) and the outer periphery abuts against the inner edge surface of the ring edge (121).