CN215334637U

CN215334637U - Reversing plug valve

Info

Publication number: CN215334637U
Application number: CN202120537134.2U
Authority: CN
Inventors: 李满然
Original assignee: Wenzhou Nuomeng Technology Co ltd
Current assignee: Wenzhou Nuomeng Technology Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-12-28
Anticipated expiration: 2031-03-15

Abstract

The utility model relates to a reversing plug valve which is characterized in that a three-surface communicated section of a runner port on a valve core is in a U shape, so that at least one medium inlet and/or at least one medium outlet are communicated with each other, the inner side of the runner port is in an arc shape, and the radian of the arc is the same as the inner diameter of the medium inlet and/or the medium outlet; the valve core is positioned on the peripheral side wall of the valve core at the inner side of the runner port under the action of external force, and can block one medium inlet or one medium outlet. The valve core is provided with the U-shaped flow passage port with three communicated sides, so that the medium inlets and/or the medium outlets in different directions in the valve core can be communicated and reversed by the three communicated flow passage ports when the valve is used; and because the three sides of the runner port are communicated and the radian of the inner side of the runner port is the same as the inner diameter of the medium inlet or the medium outlet, the pressure balance in the valve body is ensured, thereby effectively avoiding the leakage of the joint of the valve body and the valve core and also effectively avoiding the loss of medium flow.

Description

Reversing plug valve

Technical Field

The utility model relates to a valve, in particular to a reversing plug valve which is mainly applied to the field of pipeline engineering.

Background

The plug valve is a plunger-shaped rotary valve, and when the plug valve is used, a runner port on the plug valve is communicated or closed with an inlet and an outlet on the valve body by rotating 90 degrees, so that the opening or the closing of the valve is realized.

The existing plug valve has the following defects, which are specifically shown as follows:

firstly, the valve core runner port of plug valve is for guaranteeing the intensity of case, sets up in the centre of case basically, and its cross-section is the rectangle mostly, and its sectional area is less than the flow cross-section area of the business turn over of valve body, when the case is in the open mode, receives the influence that the rectangular runner port cross-section reduces, and the medium pressure of valve body import one side can grow in the twinkling of an eye and keep higher pressure for a long time at the valve opening in-process, and this risk that takes place to reveal after not only can leading to the increase of valve internal pressure. Moreover, when the medium pressure is high after the cock valve is opened, the valve core can float upwards under the action of the medium pressure, so that the sealing performance of the cock valve is influenced;

and secondly, the flow at one side of the outlet of the valve body is correspondingly reduced under the influence of the reduction of the sectional area of the flow passage opening, so that the loss of the medium flow is caused. And moreover, the rectangular runner port is adopted, so dead corners in the valve body are more, and the valve body is not easy to clean.

Third, because current plug valve is by the dead weight of case to fill up the clearance in the valve body, case and valve body realize the cooperation of sealing firmly, when the valve rod drives the rotatory opening or the closure of cock, the friction that is hard material case and valve body simultaneously is great relatively, has not only improved the operating torque of plug valve, still can produce the powder piece during the rotation to pollute the medium, make the valve can't be applied to food, medicine field.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the reversing plug valve which can not only solve the technical problems that the leakage of the valve is easy to occur, the torque is large and the like caused by the fact that the medium pressure is increased and maintained for a long time when the valve core is opened, but also effectively reduce the loss of medium flow, avoid the generation of powder scraps and avoid the pollution of the medium.

In order to solve the technical problems, the utility model adopts the technical scheme that the reversing plug valve comprises a valve body and a valve core arranged in the valve body, wherein the valve body is provided with a medium inlet and a medium outlet; the valve body is provided with at least one medium inlet and at least one medium outlet, three surfaces of a runner port on the valve core are communicated with each other to form a U-shaped cross section, so that the at least one medium inlet and/or the at least one medium outlet are communicated with each other, the inner side of the runner port is arc-shaped, and the arc radian of the runner port is the same as the inner diameter of the medium inlet and/or the medium outlet; the valve core is positioned on the peripheral side wall of the valve core at the inner side of the runner port under the action of external force, and can block one medium inlet or one medium outlet.

Preferably, a plastic bushing matched with the valve core in shape is arranged outside the valve core, and the bushing is fixedly connected with the valve core and synchronously linked with the valve core.

Preferably, two ends of the bushing are provided with sealing grooves, sealing rings are respectively arranged in the sealing grooves, and each sealing ring is respectively attached and sealed with the wall of the inner cavity of the valve body; and the flow passage port on the valve core is positioned between the two sealing rings.

Preferably, a butterfly spring is arranged at the bottom of the valve core, one end of the butterfly spring is attached to the bottom of the valve core, and the other end of the butterfly spring is abutted and press-fitted with the valve body.

Preferably, a needle bearing is arranged at the bottom end of the valve core, and the needle bearing is sleeved outside the valve core and fixedly connected with the valve body.

Preferably, the bottom end of the valve core is provided with a lower rotating shaft, the lower rotating shaft is inserted into the valve body, the needle bearing is sleeved outside the lower rotating shaft, and the belleville spring is sleeved outside the lower rotating shaft and is arranged between the bottom of the valve core and the needle bearing to press the needle bearing against the valve body to be fixed.

Preferably, the valve body further comprises an upper valve cover and a lower valve cover, the upper valve cover is fixedly connected with the valve body through bolts, and the lower valve cover is connected with the valve body into a whole through threads; the upper end of the valve core is provided with an upper rotating shaft which penetrates through the upper valve cover to be fixedly connected with the driving mechanism, the lower rotating shaft is inserted into a positioning hole formed in the lower valve cover, one end of the belleville spring is abutted against the bottom end face of the valve core, the other end of the belleville spring drives the needle bearing to be abutted against and fixed with the lower valve cover, and the tensity of the belleville spring can be adjusted by the lower valve cover under the action of external force.

Preferably, the lower valve cover comprises a cover body and an adjusting cap, the cover body is in threaded connection with the valve body, a screw hole is formed in the center of the cover body, the positioning hole is formed in the center of the adjusting cap, the adjusting cap is in threaded connection with the screw hole, and the butterfly spring drives the needle bearing to be in abutting connection with the end face of the positioning hole in the adjusting cap.

Preferably, the valve body is provided with three medium pipelines, wherein at least one of the three medium pipelines is a medium inlet or a medium outlet.

Preferably, the driving mechanism is one of a pneumatic, electric or hydraulic driving mechanism.

The valve has the advantages that at least one medium inlet or medium outlet is arranged on the valve body, and the valve core is provided with the U-shaped channel port with three communicated surfaces, so that the medium inlets and/or the medium outlets in different directions in the valve can be communicated and reversed by utilizing the channel ports with three communicated surfaces when in use; and because the three sides of the runner port are communicated and the radian of the inner side of the runner port is the same as the inner diameter of the medium inlet or the medium outlet, when the valve core is rotated to communicate the medium inlet and the medium outlet, the sectional area of the runner port is larger than the sectional areas of the medium inlet and the medium outlet, so that the medium in the valve body can stably enter the medium outlet through the runner port, the medium pressure in the valve body can not be increased instantly, the pressure balance in the valve body is ensured, the leakage at the joint of the valve body and the valve core is effectively avoided, and the loss of medium flow can also be effectively avoided.

Drawings

FIG. 1 is a perspective view of a reversing plug valve according to an embodiment of the present invention

FIG. 2 is a cross-sectional structural diagram of a reversing plug valve according to an embodiment of the present invention

FIG. 3 is a front perspective view of the valve core in the embodiment of the present invention

FIG. 4 is a bottom perspective view of the valve core in the embodiment of the present invention

FIG. 5 is a front perspective view of a bushing according to an embodiment of the present invention

FIG. 6 is a bottom perspective view of the bushing in an embodiment of the present invention

Detailed Description

The embodiments of the utility model will be further explained with reference to the drawings in which:

as shown in fig. 1-6, the utility model is a reversing plug valve, comprising a valve body 1 and a valve core 2 arranged in the valve body 1, wherein the valve body 1 is provided with a medium inlet 11 and a medium outlet 12, the valve core 2 is provided with a flow passage port 21, and the valve core 2 can rotate to enable the flow passage port 21 to be communicated with the closed medium inlet 11 and the closed medium outlet 12; the valve body 1 is provided with at least one medium inlet 11 and at least one medium outlet 12, three surfaces of a flow passage port 21 on the valve core 2 are communicated with each other in a U-shaped section, so that the at least one medium inlet 11 and/or the at least one medium outlet 12 are communicated with each other, the inner side of the flow passage port 21 is arc-shaped, and the arc-shaped radian of the flow passage port is the same as the inner diameter of the medium inlet 11 and/or the medium outlet 12; the valve core 2 is positioned at the peripheral side wall of the valve core 2 at the inner side of the flow passage opening 21 under the action of external force, and can block one medium inlet 11 or one medium outlet 12. By arranging at least one medium inlet 11 or medium outlet 12 on the valve body 1 and arranging the U-shaped channel port 21 with three sides communicated with each other on the valve core 2, the medium inlet 11 and/or the medium outlet 12 in different directions in the valve body can be communicated and reversed by utilizing the channel port 21 with three sides communicated with each other when in use; and because the three sides of the runner port 21 are communicated and the radian of the inner side of the runner port is the same as the inner diameter of the medium inlet 11 or the medium outlet 12, when the valve core 2 is rotationally communicated with the medium inlet 11 and the medium outlet 12, the sectional area of the runner port 21 is larger than the sectional areas of the medium inlet 11 and the medium outlet 12, so that the medium in the valve body 1 can stably enter the medium outlet 12 through the runner port 21, the medium pressure in the valve body 1 cannot be instantly increased, the pressure balance in the valve body 1 is ensured, the leakage at the joint of the valve body 1 and the valve core 2 is effectively avoided, and the loss of the medium flow can also be effectively avoided.

In order to solve the problem that the friction force is larger when the valve core 2 is rotationally opened or closed, so that the operation torque of the valve is increased and powder scraps are generated in the valve body 1 to pollute a medium, a plastic bush 3 matched with the valve core 2 in shape is arranged outside the valve core 2, and the bush 3 is fixedly connected with the valve core 2 and synchronously linked with the valve core 2. Through set up the plastic bush 3 that case 2 and valve body 1 keep apart outside case 2, like this the characteristic of usable plastics material reduces case 2 and opens and closed frictional force, when reducing the operating torque of valve, can also effectively avoid producing powder piece pollution medium between case 2 and the valve body 1, guarantees the use health nature of valve, can satisfy the trade use of different sanitary grades, has promoted the application range of valve. In the actual production process, the plastic lining 3 is made of Polytetrafluoroethylene (PTFE) and is wrapped outside the valve core 2 and the flow passage opening 21. Because the upper and lower both ends of case 2 are sealed with valve body 1 inner chamber mutually and keep apart, consequently, in order to practice thrift manufacturing cost and be convenient for production assembly, the upper and lower both ends of case 2 need not wrap up bush 3. Of course, the bushing 3 can be made of other plastic materials, such as Fluorinated Ethylene Propylene (FEP) and the like, and can also serve the same purpose of reducing friction and operating torque, and the specific material can be determined according to the requirements of users or market demands.

In order to ensure the sealing performance of the valve body 1 and avoid leakage between the valve body 1 and the bushing 3, sealing grooves 31 are formed at two ends of the bushing 3, sealing rings 32 are respectively arranged in the sealing grooves 31, and the sealing rings 32 are respectively attached and sealed with the inner cavity wall of the valve body 1; the flow passage port 21 on the valve core 2 is positioned between the two sealing rings 32. Through setting up seal groove 31 at 3 both ends of bush to install sealing washer 32 additional in seal groove 31, thereby form sealed the isolation between 3 both ends of bush and the valve body 1, when case 2 drives 3 rotatory openings and the closure of bush, the medium gets into between bush 3 and the valve body 1, receives the packing of the sealing washer 32 at the upper and lower both ends of bush 3 to separate, just can guarantee the sealing performance of valve body 1. Of course, the sealing of the valve body 1 can also be arranged at the joint of the valve body 1 and the valve cover, and the specific arrangement can be determined according to the situation or the requirement of a user.

Because the valve body 1 cross-section of plug valve is trapezoidal, and the little lower extreme in upper end of case 2 is big, for the sealing performance who guarantees between bush 3 and the valve body 1 case 2 bottom be equipped with disc spring 4, this disc spring 4 one end is laminated with case 2 bottom, the other end and valve body 1 counterbalance press fit. By arranging the belleville spring 4 at the bottom of the valve core 2, the valve body 1 can extrude the sealing ring 32 sleeved outside the bushing 3 by utilizing the elasticity of the belleville spring 4, so that the sealing ring 32 is attached to the inner peripheral side wall of the valve body 1 more tightly, and the sealing performance between the valve body 1 and the valve core 2 is ensured.

In order to reduce the operating torque of the valve, a needle bearing 5 is arranged at the bottom end of the valve core 2, and the needle bearing 5 is sleeved outside the valve core 2 and fixedly connected with the valve body 1. By arranging the needle bearing 5 at the bottom of the valve core 2, the operating torque of the valve core 2 can be greatly reduced when the valve core is used, the power of the driving mechanism 6 can be reduced, and the production cost is reduced. In the practical use process, other bearings can be adopted instead, such as ball bearings and the like, and the specific structure can be determined according to the structure of the valve body 1 or the requirements of users.

In order to facilitate the assembly and fixation of the needle bearing 5, the bottom end of the valve core 2 is provided with a lower rotating shaft 22, the lower rotating shaft 22 is inserted into the valve body 1, the needle bearing 5 is sleeved outside the lower rotating shaft 22, and the belleville spring 4 is sleeved outside the lower rotating shaft 22 and is arranged between the bottom of the valve core 2 and the needle bearing 5 to press the needle bearing 5 against the valve body 1 so as to be fixed. By arranging the lower rotating shaft 22 at the bottom of the valve core 2, the valve core 2 can be conveniently positioned, dislocation during assembly is prevented, assembly benefit is improved, and meanwhile, the needle bearing 5 can be conveniently installed and fixed. Of course, the same requirements can be achieved without arranging the lower rotating shaft 22, for example, by directly installing the needle bearing 5 outside the valve core 2, but the arrangement of the lower rotating shaft 22 can greatly facilitate production and processing, save materials and effectively reduce production cost.

For example, in the production, assembly, disassembly and cleaning of the plug valve, the valve body 1 further comprises an upper valve cover 7 and a lower valve cover 8, the upper valve cover 7 is fixedly connected with the valve body 1 through bolts, and the lower valve cover 8 is connected with the valve body 1 into a whole through threads; the upper end of the valve core 2 is provided with an upper rotating shaft 23, the upper rotating shaft 23 penetrates through the upper valve cover 7 to be fixedly connected with the driving mechanism 6, the lower rotating shaft 22 is inserted into a positioning hole formed in the lower valve cover 8, one end of the belleville spring 4 is abutted against the bottom end face of the valve core 2, the other end of the belleville spring drives the needle bearing 5 to be abutted against and fixed with the lower valve cover 8, and the tension degree of the belleville spring 4 can be adjusted by the lower valve cover 8 under the external force. Through adding respectively in the upper and lower both ends of valve body 1 and establishing valve gap 7 and lower valve gap 8, when making things convenient for the equipment of case 2, still can dismantle at any time and wash in the use like this, guarantee the cleanness in the valve body 1, effectively prevent the mixed pollution of different media. And set up lower valve gap 8, still can adjust the plug valve according to the pressure of different medium, make the plug valve be suitable for different operating mode environment. If in use, the tension of the belleville spring 4 can be adjusted by only screwing or unscrewing the lower valve cover 8, so that the pressure of the valve body 1 is adjusted. Secondly, the belleville spring 4 is arranged between the bottom of the valve core 2 and the lower valve cover 8, when the pressure in the valve body 1 is abnormal, the belleville spring 4 can also play a role in buffering to enable the valve core 2 to float along the valve body 1, the sealing ring 32 is effectively prevented from being damaged due to overhigh medium pressure, and the sealing performance of the valve body 1 is ensured.

In order to facilitate the assembly and positioning of the valve element 2 and the adjustment of the pressure in the valve, and ensure the sealing performance of the valve body 1, the lower valve cover 8 includes a cover body 81 and an adjusting cap 82, the cover body 81 is in threaded connection with the valve body 1, a screw hole is arranged at the center of the cover body 81, a positioning hole is arranged at the center of the adjusting cap 82, the adjusting cap 82 is in threaded connection with the screw hole, and the butterfly spring 4 drives the needle bearing 5 to be in abutting connection with the end face of the positioning hole on the adjusting cap 82. The lower valve cover 8 is designed to be a split body and consists of a cover body 81 and an adjusting cap 82, so that when the valve needs to be cleaned, the cover body 81 can be rotated to separate the cover body 81 from the valve body 1, and the valve core 2 is conveniently detached to clean the valve. Different media can lead to the difference of medium pressure in the pipeline, in order to make and avoid case 2 and bush 3 impaired, influence the sealing performance of valve, in the use, can go to screw or unscrew according to the medium pressure of difference and adjust the rate of tension that belleville spring 4 is adjusted to effectively avoid too big at medium pressure, extrude case 2 and damage the outer sealing washer 32 of bush 3, guarantee the sealing performance of valve body 1.

In order to facilitate the mixing and proportioning of different media in the production process, three media pipe heads are arranged on the valve body 1, wherein at least one of the three media pipe heads is a media inlet 11 or a media outlet 12. By arranging the three medium pipe heads on the valve body 1, one or two of the medium pipe heads can be used as the medium inlet 11, so that different media are mixed and proportioned in the valve body 1 or one medium respectively enters different medium outlets 12 to be dispersed and proportioned. In the use process, the intercommunication or the reversing of different medium inlets 11 and medium outlets 12 in the valve body 1 can be realized through the rotation of the valve core 2.

In order to realize the automatic control of the reversing plug valve, the driving mechanism 6 is one of pneumatic, electric or hydraulic driving mechanisms 6.

The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A reversing plug valve comprises a valve body and a valve core arranged in the valve body, wherein a medium inlet and a medium outlet are arranged on the valve body; the valve is characterized in that the valve body is provided with at least one medium inlet and at least one medium outlet, three surfaces of a runner port on the valve core are communicated with each other in a U-shaped way, so that the at least one medium inlet and/or the at least one medium outlet are communicated with each other, the inner side of the runner port is arc-shaped, and the arc radian of the runner port is the same as the inner diameter of the medium inlet and/or the medium outlet; the valve core is positioned on the peripheral side wall of the valve core at the inner side of the runner port under the action of external force, and can block one medium inlet or one medium outlet.

2. The reversing plug valve of claim 1, wherein a plastic bushing matching the shape of the valve plug is disposed outside the valve plug, and the bushing is fixedly connected to the valve plug and synchronously coupled to the valve plug.

3. The reversing plug valve according to claim 2, wherein seal grooves are formed at two ends of the bushing, seal rings are respectively arranged in the seal grooves, and each seal ring is respectively attached and sealed with the wall of the inner cavity of the valve body; and the flow passage port on the valve core is positioned between the two sealing rings.

4. The reversing plug valve according to claim 1, wherein a belleville spring is disposed at the bottom of the valve body, one end of the belleville spring is attached to the bottom of the valve body, and the other end of the belleville spring is in press fit with the valve body.

5. The reversing plug valve of claim 1, wherein a needle bearing is disposed at a bottom end of the valve core, and the needle bearing is sleeved outside the valve core and fixedly connected with the valve body.

6. The reversing plug valve according to any one of claims 1-5, wherein the lower end of the valve body is provided with a lower rotating shaft, the lower rotating shaft is inserted into the valve body, the needle bearing is sleeved outside the lower rotating shaft, and the belleville spring is sleeved outside the lower rotating shaft and is arranged between the bottom of the valve body and the needle bearing to press the needle bearing against the valve body to fix the needle bearing.

7. The reversing plug valve according to claim 6, wherein the valve body further comprises an upper valve cover and a lower valve cover, the upper valve cover is fixedly connected with the valve body through a bolt, and the lower valve cover is connected with the valve body into a whole through a thread; the upper end of the valve core is provided with an upper rotating shaft which passes through the upper valve cover and is fixedly connected with the driving mechanism, the lower rotating shaft is inserted into a positioning hole formed in the lower valve cover, one end of the belleville spring is abutted against the bottom end face of the valve core, the other end of the belleville spring drives the needle bearing to be abutted against and fixed with the lower valve cover, and the tension force of the belleville spring can be adjusted by the lower valve cover under the action of external force.

8. The reversing plug valve according to claim 7, wherein the lower valve cover comprises a cover body and an adjusting cap, the cover body is in threaded connection with the valve body, a screw hole is formed in the center of the cover body, the positioning hole is formed in the center of the adjusting cap, the adjusting cap is in threaded connection with the screw hole, and the butterfly spring drives the needle bearing to be in abutting connection with the end face of the positioning hole in the adjusting cap.

9. The reversing plug valve of claim 8, wherein the valve body is provided with three media conduits, at least one of which is a media inlet or a media outlet.

10. A reversing plug valve according to claim 9 wherein said drive mechanism is one of a pneumatic, electric or hydraulic drive mechanism.