CN204239798U - A kind of high temperature resistant upper-mounting type ball valve - Google Patents

Abstract

The utility model discloses a high-temperature-resistant top-loading ball valve, which comprises a valve body, a valve cover, a sphere and a valve stem. The sphere is composed of two sealing hemispheres and a wedge-shaped ball core arranged between the two sealing hemispheres. The wedge-shaped ball core and the sealing hemisphere are connected by an anti-off mechanism, and the wedge-shaped ball core is provided with a medium passage for the medium to pass through, and a compression device is installed between the bottom end of the wedge-shaped ball core and the inner cavity of the valve. Spring, the top of the wedge-shaped ball core is provided with a connection port that can be connected and fixed with the valve stem, and each sealing hemisphere in the valve body is provided with a sealing valve seat that can form a sealing fit with it. There is also a sealing device between the sealing valve seat and the valve body. The sealing device includes a spring, a spring seat and a U-shaped elastic metal ring with a U-shaped cross section. With the above structure, the utility model provides a It is a high temperature resistant top entry ball valve that is easy to disassemble and is suitable for high temperature working conditions.

Description

A high temperature resistant top entry ball valve

technical field

The utility model relates to a ball valve.

Background technique

The ball valve is a commonly used valve, and its structure usually includes a valve body, a bonnet, a ball, and a valve stem. However, since the ball of the existing ball valve is mostly an integrated structure, it is inconvenient to install, maintain and disassemble the ball valve. At the same time, the sealing between the ball and the valve body of the existing ball valve is realized by the sealing valve seat, and the sealing valve seat and the valve body are usually sealed by an O-shaped sealing ring, because the O-shaped sealing ring is made of rubber material. , so it is not resistant to high temperature, which makes the existing ball valve unable to work under high temperature conditions.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a high-temperature-resistant top-loading ball valve which is not only convenient for disassembly and assembly but also suitable for high-temperature working conditions.

In order to achieve the above purpose, the utility model provides a high-temperature-resistant top-loading ball valve, including a valve body, a valve cover, a ball, and a valve stem. The valve body is provided with a top-loading port for the ball to be loaded into. The valve The detachable cover is installed on the upper loading port of the valve body, the valve stem is pierced in the valve cover, and the ball is composed of two sealing hemispheres and a wedge-shaped core between the two sealing hemispheres , the wedge-shaped ball core and the sealing hemisphere are connected by an anti-loosening mechanism, and the wedge-shaped ball core is provided with a medium channel for the medium to pass through, and the bottom end of the wedge-shaped ball core is pressed into the inner cavity of the valve. Compression spring, the top of the wedge-shaped ball core is provided with a connection port that can be connected and fixed with the valve stem, the top of the wedge-shaped ball core is also provided with an annular limit groove, the inner end surface of the valve cover Correspondingly, there is an inserting projection that can form an inserting and limiting fit with the annular limiting groove, and each sealing hemisphere in the valve body is provided with a sealing valve seat that can form a sealing fit with it. There is also a sealing device between the sealing valve seat and the valve body. The sealing device includes a spring, a spring seat and a U-shaped elastic metal ring with a U-shaped cross section. The spring seat is installed between the valve body and the sealing valve seat. Between, the spring is press-fitted between the outer end surface of the spring seat facing the valve body and the valve body, and the U-shaped elastic metal ring is press-fitted between the inner end surface of the spring seat facing the sealing valve seat and the sealing Between the valve seats, the end of the U-shaped elastic metal ring that is in contact with the sealing seat is fixed on the sealing seat by welding, and the end of the U-shaped elastic metal ring that is in contact with the spring seat extends to the inner cavity of the valve. Fitted together, and pressed and fixed by a pressing and fixing device.

The beneficial effects of the utility model are: adopting the above structure, firstly, the sphere in the utility model is composed of two sealed hemispheres and a wedge-shaped core arranged between the two sealed hemispheres, so compared with the one-piece ball in the prior art The sphere is more convenient for disassembly and maintenance, and meets the needs of online assembly. Secondly, the sealing device between the sealing valve seat and the valve body is composed of a spring, a spring seat and a U-shaped elastic metal ring with a U-shaped cross section. Since the U-shaped elastic metal ring itself is made of metal material, it can It is suitable for high temperature working conditions, and at the same time, the U-shaped elastic metal ring also has a certain degree of elasticity, so it can compensate the thermal expansion and contraction between various parts through elastic deformation when the temperature changes, thereby effectively avoiding the There is a stuck phenomenon between them, and the sealing effect is greatly improved.

The utility model can be further configured such that the compression fixing device includes a compression ring, a support ring, a compression screw and four open rings, the support ring is sleeved on the sealing valve seat, and one axial end of the support ring passes through four The open ring is fixed to the valve body, the compression ring is located between the other axial end of the support ring and the U-shaped elastic metal ring, the compression screw is passed through the support ring, and is connected with the compression ring One end face of the pressing ring is connected, and the other end face of the pressing ring is pressed against the end of the U-shaped elastic metal ring and the spring seat.

With a further arrangement, the compression fixing device is composed of a compression ring, a support ring, a compression screw and four open-loop connections, which has a simple structure and is convenient for assembly and disassembly. At the same time, the pressing force of the pressing ring on the U-shaped spring metal ring can be effectively adjusted by rotating the pressing screw.

The utility model can further be configured that the anti-off mechanism provided between the wedge-shaped ball core and the sealing hemisphere is composed of a dovetail groove and a dovetail key that cooperate with each other. The dovetail groove is opened on the sealing hemisphere, and the dovetail The key is integrally formed on the wedge-shaped ball core, and the bottom end of the wedge-shaped ball core is also provided with a lug capable of contacting and limiting the sealing hemisphere.

With a further configuration, through the cooperation of the anti-loosening mechanism, it can effectively prevent the wedge-shaped ball core from being loosened from the sealing hemisphere when the sphere rotates.

Description of drawings

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

Fig. 2 is the top view of the sphere in the utility model;

Fig. 3 is an enlarged view of part I of Fig. 1 .

Detailed ways

As shown in Figures 1, 2, and 3, a high-temperature-resistant top entry ball valve is provided, including a valve body 1, a valve cover 2, a ball 3, and a valve stem 4. The valve body 1 is provided with a The upper loading port of the valve body 2 is mounted on the upper loading port of the valve body 1 through a detachable screw cover, the valve stem 4 is penetrated in the valve cover 2, and the ball 3 is composed of two sealing hemispheres. 31 and a wedge-shaped ball core 32 arranged between two sealing hemispheres 31, the wedge-shaped ball core 32 and the sealing hemisphere 31 are connected by an anti-off mechanism 5, and the anti-off mechanism 5 is composed of dovetail grooves 51 that cooperate with each other Composed of dovetail key 52, the dovetail groove 51 is opened on the sealing hemisphere 31, the dovetail key 52 is integrally formed on the wedge-shaped ball core 32, of course the dovetail groove 51 can also be opened on the wedge-shaped ball core 32, The dovetail key 52 is integrally formed on the sealing hemisphere 31 , and the bottom end of the wedge-shaped ball core 32 is also provided with a lug 321 which can form abutting and limiting position with the sealing hemisphere 31 . The wedge-shaped ball core 32 is provided with a medium channel 322 through which the medium can pass, and a compression spring 6 is pressed between the bottom end of the wedge-shaped ball core 32 and the inner cavity of the valve body 1, and the wedge-shaped ball core 32 The top end is provided with a connecting port 323 that can be connected and fixed with the valve stem 4, and an annular limiting groove 324 is also provided on the top end of the wedge-shaped ball core 32. The inner end surface of the valve cover 2 is correspondingly provided with The inserting protrusion 21 that can form an inserting and limiting fit with the annular limiting groove 324, and a sealing valve seat 7 that can form a sealing fit with it is provided in the valve body 1 corresponding to each sealing hemisphere 31. A sealing device 8 is also provided between the sealing valve seat 7 and the valve body 1. The sealing device 8 includes a spring 81, a spring seat 82 and a U-shaped elastic metal ring 83 with a U-shaped cross section. The spring The seat 82 is installed between the valve body 1 and the sealing valve seat 7. The spring 81 is pressed between the outer end surface 821 of the spring seat 82 facing the valve body 1 and the valve body 1. The U-shaped elastic metal The ring 83 is press-fitted between the inner end surface 822 of the spring seat 82 facing the sealing valve seat 7 and the sealing valve seat 7, and the end of the U-shaped elastic metal ring 83 abutting against the sealing valve seat 7 is fixed on the sealing surface by welding. On the valve seat 7, the end of the U-shaped elastic metal ring 83 that abuts against the spring seat 82 extends to fit the inner cavity of the valve body 1, and is fixed by a compression fixing device 9. The compression The fixing device 9 includes a compression ring 91, a support ring 92, a compression screw 93 and a four-open ring 94. The support ring 92 is sleeved on the sealing valve seat 7, and one axial end of the support ring 92 passes through the four-open ring 94 and The valve body 1 is fixed, the compression ring 91 is located between the other axial end of the support ring 92 and the U-shaped elastic metal ring 83, the compression screw 93 is passed through the support ring 92, and is connected with the One end face of the pressing ring 91 is connected, and the other end face of the pressing ring 91 is pressed against the end of the U-shaped elastic metal ring 83 abutting against the spring seat 82 . By adopting the above structure, the utility model provides a high temperature resistant top entry ball valve which is not only convenient for disassembly and assembly but also suitable for high temperature working conditions.

Claims (3)

1. a high temperature resistant upper-mounting type ball valve, comprise valve body, valve gap, spheroid, valve rod, it is characterized in that: described valve body is provided with the upper dress mouth loaded for spheroid, described valve gap detachable cover is loaded on the upper dress mouth of described valve body, described valve rod is arranged in valve gap, described spheroid is located at two interhemispheric wedge shape ball cores of sealing by two sealing hemisphere and one and is formed, be connected by escapement between wedge shape ball core with sealing hemisphere, and described wedge shape ball core offers the medium channel that can pass through for medium, Compress Spring is pressed with between the bottom of described wedge shape ball core and body cavity, the top of described wedge shape ball core is provided with the connection mouth that can be connected to a fixed with described valve rod, the top of described wedge shape ball core is also provided with an annular spacing groove, on the interior edge face of described valve gap, correspondence is provided with and can forms the spacing grafting projection coordinated of grafting with described annular spacing groove, in described valve body, corresponding each sealing hemisphere is equipped with a seal valve seat that can be sealed and matched with its formation, also seal arrangement is provided with between described seal valve seat and valve body, described seal arrangement includes spring, spring seat and cross section are the U-shaped elastic metallic ring of U-shaped, described spring seat is loaded between valve body and seal valve seat, described pressure mounting of the spring is in described spring seat towards between the exterior edge face of valve body and valve body, described U-shaped elastic metallic ring press-fits between interior edge face in described spring seat towards seal valve seat and seal valve seat, and this end that U-shaped elastic metallic ring abuts with seal valve seat is by being fixedly welded on seal valve seat, this end that U-shaped elastic metallic ring abuts with spring seat extends to and fits with body cavity, and be fixed by a clamping fixture.

2. the high temperature resistant upper-mounting type ball valve of one according to claim 1, it is characterized in that: described clamping fixture comprises hold-down ring, support ring, housing screw and pendant collet, described support ring is set on seal valve seat, axial one end of support ring is fixed by pendant collet and valve body, described hold-down ring is between the axial the other end and U-shaped elastic metallic ring of described support ring, described housing screw is arranged on support ring, and be connected with one end end face of hold-down ring, the other end end face of described hold-down ring presses on this end that U-shaped elastic metallic ring abuts with spring seat.

3. the high temperature resistant upper-mounting type ball valve of one according to claim 1, it is characterized in that: the escapement be provided with between described wedge shape ball core and sealing hemisphere is made up of the dovetail groove cooperatively interacted and dovetail key, described dovetail groove is opened on sealing hemisphere, described dovetail key is shaped on wedge shape ball core, the bottom of described wedge shape ball core is also provided with to form with described sealing hemisphere to abut spacing lug.