CN115839423B

CN115839423B - Steel pipe welding floating ball valve for heating power

Info

Publication number: CN115839423B
Application number: CN202310051596.7A
Authority: CN
Inventors: 夏福民; 辜宝宏; 孔令涛; 夏之琨; 孙占江; 曹二帅; 范志河
Original assignee: Zhonghong Valve Co ltd
Current assignee: Zhonghong Valve Co ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-08-08
Anticipated expiration: 2043-02-02
Also published as: CN115839423A

Abstract

The invention relates to the technical field of ball valves, in particular to a steel pipe welded floating ball valve for heating power. The utility model provides a steel pipe welding floating ball valve for heating power, includes valve body, casing and spheroid etc. casing fixed mounting is equipped with the spheroid on the valve body in the casing, all opens on casing and the spheroid and has circular through-hole, and the spheroid can rotate relative to the casing, and valve rod fixed connection is on the spheroid, and the connecting pipe has all been welded to the valve body both sides, and the fender bracket is installed to the one end that the connecting pipe stretches into the valve body, installs the disk seat between casing and the fender bracket. According to the invention, by adopting the structural design of the double sealing rings, the two groups of sealing rings are fixed in the stepped valve seat, so that the upper limit of bearing pressure of the sealing rings is effectively enhanced, the loss rate of the sealing rings is reduced, the service life of the floating ball valve in normal operation can be effectively prolonged, and the problem of frequent replacement and maintenance of components is avoided.

Description

Steel pipe welding floating ball valve for heating power

Technical Field

The invention relates to the technical field of ball valves, in particular to a steel pipe welded floating ball valve for heating power.

Background

The thermodynamic pipeline is also called as thermodynamic pipeline network, and the thermodynamic pipeline is a heat supply pipeline which is conveyed from a heat supply center to a building, has multiple performances of strong corrosion resistance, leakage resistance, heat resistance and the like, and when the pipeline is leaked, the consequences can be large or small, and because the thermodynamic pipeline is an ideal high-temperature liquid or high-temperature gas conveying pipeline, the quality and the quality of the thermodynamic pipeline are greatly related to economic benefit and energy consumption, and the main materials of the thermodynamic pipeline are the same and are steel pipes.

The valve is an indispensable accessory in the heating power pipeline, the existing heating power pipeline mostly uses a floating ball valve to control the cut-off and the cut-on of the two-phase coexistence medium of hot water and steam, and the ball valve is mainly characterized by compact structure, reliable sealing, simple structure, convenient maintenance, normal closed state of the sealing surface and the spherical surface, difficult erosion of the medium, easy operation and maintenance, and suitability for common working mediums such as water, solvent, acid, natural gas and the like.

In the working process of the floating ball valve, as the ball body of the ball valve floats, under the action of medium pressure, the ball body can generate certain displacement and is tightly pressed on the sealing surface of the outlet end, so that the sealing of the outlet end is ensured, but the load of the ball body bearing working medium is fully transferred to the outlet sealing ring, the sealing ring is seriously worn, the sealing ring is possibly damaged when the ball body is impacted by higher pressure, and further the ball body is not tightly closed to leak, so that the service life of the ball valve is limited, and the assembly is required to be frequently replaced for maintenance. In order to solve the problems, it is necessary to design a thermal steel pipe welding floating ball valve with a double-sealing ring structure.

Disclosure of Invention

In order to overcome the defects that when the existing floating ball valve works, the sealing ring is under high pressure impact for a long time, the loss rate is too high, the service life of the ball valve is limited, and components are required to be frequently replaced for maintenance, the invention provides the thermal steel pipe welding floating ball valve with a double sealing ring structure.

The technical proposal is as follows: the utility model provides a steel pipe welding floating ball valve for heating power, includes valve body, casing, spheroid, valve rod, fender bracket, disk seat and connecting pipe, casing fixed mounting is on the valve body, is equipped with the spheroid in the casing, all opens circular through-hole on casing and the spheroid, and the spheroid can rotate relative to the casing, and valve rod fixed connection is on the spheroid, and the valve body both sides all weld the connecting pipe, and the fender bracket is installed to the one end that the connecting pipe stretches into the valve body, installs the disk seat between casing and the fender bracket, still including first sealing washer and second sealing washer, the disk seat is echelonment, and the nearly spheroid end of disk seat is protruding along circumference, installs first sealing washer and second sealing washer on the disk seat.

As the improvement of above-mentioned scheme, the valve rod is including pole portion, fixed part and handle portion, and pole portion adopts flat head structure in order to avoid dislocation, and fixed part fixed mounting is on the valve body, and the handle portion end is equipped with bellied anti-skidding structure.

As an improvement of the scheme, the side face of the shell is provided with a through hole, and the spiral cover is detachably arranged at the through hole of the side face of the shell.

As the improvement of above-mentioned scheme, still including guide block, dead lever, annular frame and elastic component, be equipped with the guide block that extends to inboard in the spheroid passageway, slide on the guide block and be equipped with the dead lever, dead lever end-to-end connection has annular frame, is connected with elastic component between guide block and the annular frame.

As an improvement of the scheme, the outer side of the annular frame is provided with a chamfer, and the angle of the chamfer is between 37 degrees and 53 degrees.

As an improvement of the above proposal, a spring washer is arranged between the protection frame and the connecting pipe.

1. According to the invention, by adopting the structural design of the double sealing rings, the two groups of sealing rings are fixed in the stepped valve seat, so that the upper limit of bearing pressure of the sealing rings is effectively enhanced, the loss rate of the sealing rings is reduced, the service life of the floating ball valve in normal operation can be effectively prolonged, and the problem of frequent replacement and maintenance of components is avoided;

2. according to the invention, the side surface of the shell is provided with the detachable spiral cover, so that the inner side of the sphere channel can be cleaned rapidly when the valve is closed, and impurities in the medium are prevented from accumulating in the sphere to influence medium transmission;

3. according to the invention, through the matching of parts such as the guide block, the fixed rod, the annular frame and the like, the covering protection of the connection surface of the protection frame and the shell is realized, and the annular frame can scrape impurities on the protection frame when rotating along with the ball body, so that the smooth transmission of the medium in the channel is effectively ensured.

Drawings

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

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a schematic perspective view of the structure of the present invention a.

Fig. 4 is a schematic perspective view of a valve stem according to the present invention.

Fig. 5 is a schematic perspective view of the housing and the screw cap of the present invention.

Fig. 6 is a schematic perspective view of the guide block, the fixing rod and the ring frame of the present invention.

Fig. 7 is an enlarged view of a portion of the ring frame of the present invention.

Reference numerals in the figures: 1. valve body, 2, casing, 3, spheroid, 4, valve rod, 41, pole portion, 42, fixed part, 43, handle portion, 5, fender bracket, 6, disk seat, 7, connecting pipe, 8, first sealing washer, 9, second sealing washer, 10, spiral cover, 11, guide block, 12, dead lever, 13, ring frame, 14, elastic component, 15, spring washer.

Detailed Description

The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present application and are not limiting the scope of the present application. The implementation conditions used in the examples may be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are generally those in routine experiments.

Example 1

A steel tube welded floating ball valve for heating power is shown in figures 1-4, which comprises a valve body 1, a housing 2, a ball 3, a valve rod 4, a protection frame 5, a valve seat 6 and a connecting tube 7, wherein the spherical housing 2 is welded on the valve body 1, the ball 3 is movably installed in the housing 2, circular through holes are formed in the housing 2 and the ball 3, the ball 3 can rotate relative to the housing 2, a limit seat for limiting the ball 3 to slide downwards is welded at the bottom of the valve body 1, the valve rod 4 is fixedly connected to the top end of the ball 3 in an inserted mode, the connecting tube 7 is welded on two sides of the valve body 1, the pipe diameters of a housing 2 channel, the ball 3 channel and the connecting tube 7 are equal and can be communicated to form a diameter, one end of the connecting tube 7 extending into the valve body 1 is welded with the protection frame 5, the protection frame 5 is fixedly connected with the housing 2, the valve seat 6 is installed between the housing 2 and the protection frame 5, the valve seat 6 is made of polytetrafluoroethylene, the valve seat 6 is made of high polymer materials such as para-position polystyrene, the valve seat 6 is in a stepped shape, the valve seat 6 is provided with a first sealing ring 8, a second sealing ring 9 and a spring 15, the valve seat 6 is close to the ball 3 end protrudes along the circumferential direction, the ball seat 6 is fixedly connected to the top end of the ball 3, the first sealing ring 8 and the second sealing ring 9 is provided with a spring seat 9, the first sealing ring 8 and the second sealing ring 9 is provided with a spring seat 15, the valve seat 15, and the valve seat is provided with a spring seat 15, and the valve seat 15 is made of an automatic sealing ring and a valve seat 5.

When the floating ball valve is used for controlling the cutting-off and switching-on of a hot water and steam two-phase coexisting medium, the valve body 1, the shell 2 and the connecting pipe 7 are formed by welding steel pipes serving as main materials, so that the sealing connection among the valve body 1, the shell 2 and the connecting pipe 7 is ensured, the valve rod 4 drives the ball body 3 to rotate 90 degrees around the center of the valve rod 4, the channel of the ball body 3, the channel of the shell 2 and the diameter of the connecting pipe 7 are communicated, the medium can flow through the ball body without loss, and then the valve can be turned 90 degrees again, so that the valve can be closed to cut off the pipeline medium, at the moment, the ball body 3 generates certain displacement under the action of the medium pressure and is tightly pressed on the sealing surface of the outlet end of the shell 2, the sealing of the outlet end is ensured, the valve seat 6 made of elastic materials is tightly pressed on the protection frame 5, the contact area of the first sealing ring 8 and the second sealing ring 9 is increased, the contact area of the sealing ring and the valve seat 6 can bear larger medium thrust without damage, and the sealing connection between the valve seat 6 and the valve body 1 and the connecting pipe 7 is ensured.

Example 2

On the basis of embodiment 1, as shown in fig. 4, the valve rod 4 includes a rod portion 41, a fixing portion 42 and a handle portion 43, the rod portion 41 adopts a flat head structure to avoid dislocation, the rod portion 41 is vertically installed upwards, the fixing portion 42 is fixedly installed at the top end of the valve body 1 through bolts, protruding anti-slip structures are arranged on two sides of the tail end of the handle portion 43, and the handle portion 43 can rotate to drive the rod portion 41 to rotate so as to drive the ball body 3 to rotate.

As shown in fig. 5, a circular through hole is formed in the side surface of the housing 2, a screw cap 10 is detachably mounted at the through hole of the side surface of the housing 2 in a screw-fit manner, and the inner channel is aligned with the screw cap 10 when the ball 3 is rotated to a closed state.

When the ball valve is controlled to be opened and closed by the valve rod 4, the rod part 41 of the flat head structure is connected with the handle part 43 so as not to be misplaced, so that the opening and closing states indicated by the handle part 43 are consistent with the valve, the anti-slip structure of the handle part 43 can effectively avoid misoperation caused by hand slip, and meanwhile, when the ball valve is in a closed state, the rotary cover 10 on the side face of the shell 2 can be unscrewed and taken down, and at the moment, the circular through holes in the ball body 3 are aligned with the through holes on the side face of the shell 2, so that the internal channel of the ball body 3 can be conveniently cleaned, and impurities in a medium are prevented from being accumulated in the ball body 3, and the medium transmission is influenced.

As shown in fig. 6 and 7, the device further comprises a guide block 11, a fixing rod 12, an annular frame 13 and an elastic piece 14, wherein the guide block 11 extending inwards is welded in the channel of the sphere 3, the guide block 11 is provided with four guide blocks and is arranged symmetrically up and down, the fixing rod 12 is arranged on the guide block 11 in a sliding manner, the fixing rod 12 can horizontally move along the guide block 11, the annular frame 13 is welded at the tail end of the outer side of the fixing rod 12, an annular protruding part is arranged on the outer side of the annular frame 13, the elastic piece 14 is connected between the guide block 11 and the annular frame 13, the elastic piece 14 is a stainless steel compression spring or a rubber elastic sleeve, a chamfer is arranged on the outer side of the annular frame 13, and the angle of the chamfer is 45 degrees.

When the ball valve is in an open state, the annular frame 13 slides outwards along the channel relative to the ball body 3 under the reset action of the elastic piece 14, the fixed rod 12 is driven to move outwards along the guide block 11, the elastic piece 14 stretches, the annular frame 13 covers the connecting surface between the shell 2 and the protection frame 5, impurities are prevented from flowing into gaps, when the rotating valve rod 4 drives the ball body 3 to rotate, the annular frame 13 is pressed inwards along the chamfer inclined surface along with rotation, the elastic piece 14 is compressed under the stress, and the annular frame 13 can scrape the impurities on the protection frame 5 in the rotation process.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The utility model provides a steel pipe welding floating ball valve for heating power, including valve body (1), casing (2), spheroid (3), valve rod (4), fender bracket (5), disk seat (6) and connecting pipe (7), casing (2) fixed mounting is on valve body (1), be equipped with spheroid (3) in casing (2), all open circular through-hole on casing (2) and spheroid (3), and spheroid (3) can rotate relative casing (2), valve rod (4) fixed connection is on spheroid (3), connecting pipe (7) have all been welded to valve body (1) both sides, fender bracket (5) are installed to the one end that connecting pipe (7) stretched into valve body (1), install disk seat (6) between casing (2) and fender bracket (5);

the novel valve seat is characterized by further comprising a first sealing ring (8) and a second sealing ring (9), wherein the valve seat (6) is in a ladder shape, the end, close to the ball body (3), of the valve seat (6) protrudes along the circumferential direction, and the first sealing ring (8) and the second sealing ring (9) are arranged on the valve seat (6).

2. The steel tube welded floating ball valve for heating power according to claim 1, wherein the valve rod (4) comprises a rod portion (41), a fixing portion (42) and a handle portion (43), the rod portion (41) adopts a flat head structure to avoid dislocation, the fixing portion (42) is fixedly installed on the valve body (1), and a protruding anti-slip structure is arranged at the tail end of the handle portion (43).

3. A welded steel tube float ball valve as claimed in claim 1 wherein the side of the housing (2) is provided with a through hole and the screw cap (10) is detachably mounted at the through hole in the side of the housing (2).

4. The steel tube welded floating ball valve for heating power according to claim 1, further comprising a guide block (11), a fixing rod (12), an annular frame (13) and an elastic piece (14), wherein the guide block (11) extending inwards is fixedly connected in a channel of the ball body (3), the fixing rod (12) is arranged on the guide block (11) in a sliding mode, the annular frame (13) is connected to the tail end of the fixing rod (12), and the elastic piece (14) is connected between the guide block (11) and the annular frame (13).

5. A welded floating ball valve for a thermodynamic steel pipe as claimed in claim 4, characterized in that said annular shelf (13) is externally provided with a chamfer having an angle comprised between 37 ° and 53 °.

6. A welded steel float ball valve according to claim 1, characterized in that a spring washer (15) is mounted between the protective bracket (5) and the connecting pipe (7).