A multifunctional pre-meter valve

Abstract

The present invention relates to the technical field of valves, and particularly relates to a multifunctional pre-meter valve, comprising: a valve body, a fluid passage opened on the valve body, a ball valve stem rotatably arranged on the valve body, and a valve ball arranged in the valve body. One end of the ball valve stem located in the valve body is engaged with the valve ball, and a telescopic check device is further arranged on the valve body for positioning the valve ball and preventing the reverse flow of fluid from affecting the meter.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a multi-functional pre-meter valve. Background Art

[0002] At present, in a pipeline system, it is usually necessary to install various valves with diverse functions in front of the meter, such as ball valves, filter valves, pressure reducing valves, check valves, etc., so as to endow it with functions such as opening and closing, check, etc., thereby playing a role in protecting the meter and improving accuracy. However, if so many single-function valves are installed in series in front of the meter, there will be a problem of excessive pipeline length, which not only brings inconvenience to installation and maintenance, but also easily increases leakage points, and will also occupy a large installation space and take more installation time. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention proposes a multi-functional pre-meter valve.

[0004] To achieve the above object, the technical solution of the present invention provides a multi-functional pre-meter valve, including: a valve body, a fluid passage opened on the valve body, a ball valve stem rotatably arranged on the valve body, and a valve ball arranged in the valve body, one end of the ball valve stem located in the valve body is engaged with the valve ball, and it is characterized in that: a telescopic check device is further arranged on the valve body for positioning the valve ball and preventing the reverse flow of fluid from affecting the meter.

[0005] Further improvement is: the telescopic check device includes: two symmetrically arranged arc-shaped plates, a sealing combination device arranged between the arc-shaped plates, a telescopic tube telescopically arranged in the arc-shaped plates through a limit sliding device, and a check device arranged in the arc-shaped plates, and the arc-shaped plates can be spliced into a cylinder.

[0006] Further improvement is: the sealing combination device includes: an extension plate arranged on the arc-shaped plate, a connection thread opened on the extension plate for threaded connection with the valve body, and a sealing layer arranged at the butt joint of the two arc-shaped plates.

[0007] Further improvement is: the limit sliding device includes: a first limit ring platform arranged on the telescopic tube, the first limit ring platform is matched with the inner diameter of the arc-shaped plate, and a second limit ring platform for engaging with the first limit ring platform is further arranged on the arc-shaped plate.

[0008] Further improvement is: a snap spring groove is further opened on the telescopic tube, a snap spring is arranged in the snap spring groove, a nut is sleeved on the telescopic tube, and a third limit ring platform for engaging with the snap spring is arranged on the nut.

[0009] Further improvements are as follows: The check valve device includes a first limiting ring groove formed on the arc-shaped plate, a second limiting ring groove formed on the arc-shaped plate, a valve seat ring disposed in the second limiting ring groove, and a mounting ring disposed in the first limiting ring groove through a compression resistance device. A sliding sleeve is provided on the mounting ring, a check valve stem is slidably disposed in the sliding sleeve, and a valve plate is provided on the check valve stem.

[0010] Further improvements are as follows: The compression resistance device includes an inclined plate disposed in the first limiting ring groove, a sliding groove formed on the mounting ring corresponding to the inclined plate, pressing blocks disposed on both sides of the sliding groove and matching with the inclined plate, and inclined bars disposed on both sides of the inclined plate for engaging with the pressing blocks. The inclined bars are gradually inclined downward from the direction of fluid backflow. A positioning ring platform is provided on the arc-shaped plate, and a first spring is provided between the positioning ring platform and the mounting ring. One end of the first spring abuts against the positioning ring platform, and the other end abuts against the mounting ring.

[0011] Further improvements are as follows: A third limiting ring groove is further provided on the arc-shaped plate, a filter net ring is disposed in the third limiting ring groove, and a filter net is disposed in the filter net ring.

[0012] Further improvements are as follows: A locking device for preventing unauthorized personnel from rotating the valve stem is further provided between the valve body and the ball valve stem.

[0013] Further improvements are as follows: The locking device includes four first locking holes evenly formed on the valve body, a protective cover fixedly connected to the ball valve stem, second locking holes formed on the protective cover corresponding to the first locking holes, locking magnetic blocks slidably disposed up and down in the first locking holes and the second locking holes, and a second spring disposed in the first locking holes. One end of the second spring abuts against the locking magnetic block, and the other end abuts against the bottom of the first locking hole.

[0014] The advantages and beneficial effects of the present invention are as follows:

[0015] It has diverse functions and reduces space. The cylinder body is composed of two separated arc-shaped plates, and a telescopic pipe, a check valve device, and a filter net are disposed in the cylinder body, greatly reducing the space occupied by the valve and greatly improving the use convenience. Further, each component disposed on the arc-shaped plate can be replaced, greatly reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view cross-sectional schematic diagram of a multifunctional meter front valve of the present invention;

[0017] Figure 2 It is a cross-sectional schematic diagram after the arc-shaped plates of a multifunctional meter front valve of the present invention are combined;

[0018] Figure 3Schematic diagram of the telescopic pipe of a multi-functional meter front valve of the present invention;

[0019] Figure 4 Schematic diagram of the arc plate of a multi-functional meter front valve of the present invention;

[0020] Figure 5 Schematic diagram of the mounting ring of a multi-functional meter front valve of the present invention;

[0021] Figure 6 is Figure 2 Enlarged schematic diagram of part A in

[0022] In the figure: 101, valve body; 102, fluid passage; 103, ball valve stem; 104, valve ball; 105, arc plate; 106, telescopic pipe; 107, extension plate; 108, sealing layer; 109, first limiting ring platform; 110, second limiting ring platform; 111, snap ring groove; 112, snap ring; 113, nut; 114, third limiting ring platform; 115, first limiting ring groove; 116, second limiting ring groove; 117, valve seat ring; 118, mounting ring; 119, sliding sleeve; 120, check valve stem; 121, valve plate; 122, rubber pad; 123, third spring; 124, inclined plate; 125, chute; 126, pressing block; 127, inclined strip; 128, positioning ring platform; 129, first spring; 130, third limiting ring groove; 131, filter screen ring; 132, filter screen; 133, first locking hole; 134, protective cover; 135, second locking hole; 136, locking magnet; 137, second spring; 138, rounded corner. Detailed implementation manners

[0023] The following combines the drawings and embodiments to further describe the detailed implementation manners of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0024] As Figures 1-6 shown, a multi-functional meter front valve includes: a valve body 101, a fluid passage 102 opened on the valve body 101, a ball valve stem 103 rotatably arranged on the valve body 101, and a valve ball 104 arranged in the valve body 101. One end of the ball valve stem 103 located in the valve body 101 is engaged with the valve ball 104. It is characterized in that: a telescopic check device is further arranged on the valve body 101 for positioning the valve ball 104 and preventing the reverse flow of fluid from affecting the meter.

[0025] In order to facilitate the improvement of the functionality of the valve and reduce the length, the telescopic check device includes: two symmetrically arranged arc-shaped plates 105, a sealing combination device arranged between the arc-shaped plates 105, a telescopic pipe 106 telescopically arranged in the arc-shaped plates 105 through a limit sliding device, and a check device arranged in the arc-shaped plates 105. The arc-shaped plates 105 can be spliced into a cylinder.

[0026] In order to prevent water leakage after the combination of the arc-shaped plates 105, the sealing combination device includes: an extension plate 107 arranged on the arc-shaped plates 105, a connection thread (not shown in the figure) opened on the extension plate 107 for threaded connection with the valve body 101, and a sealing layer 108 arranged at the butt joint of the two arc-shaped plates 105. The sealing layer 108 is a rubber layer.

[0027] In order to facilitate the installation of the telescopic pipe 106, the limit sliding device includes: a first limit ring platform 109 arranged on the telescopic pipe 106. The first limit ring platform 109 matches the inner diameter of the arc-shaped plates 105, and a second limit ring platform 110 for engaging with the first limit ring platform 109 is also arranged on the arc-shaped plates 105.

[0028] In order to facilitate the connection between the telescopic pipe 106 and the water delivery pipe, a circlip groove 111 is also opened on the telescopic pipe 106. A circlip 112 is arranged in the circlip groove 111. A nut 113 is sleeved on the telescopic pipe 106, and a third limit ring platform 114 for engaging with the circlip 112 is arranged on the nut 113.

[0029] In order to prevent the reverse flow of the fluid from affecting the meter, the check device includes: a first limit ring groove 115 opened on the arc-shaped plates 105, a second limit ring groove 116 opened on the arc-shaped plates 105, a valve seat ring 117 arranged in the second limit ring groove 116, and an installation ring 118 arranged in the first limit ring groove 115 through a compression-resistant device. A sliding sleeve 119 is arranged on the installation ring 118, a check valve rod 120 is slidably arranged in the sliding sleeve 119, and a valve plate 121 is arranged on the check valve rod 120.

[0030] In order to further improve the check effect, a rubber pad 122 is arranged on the valve plate 121, a third spring 123 is sleeved on the check valve rod 120, and one end of the third spring 123 abuts against the valve plate 121 and the other end abuts against the sliding sleeve 119.

[0031] In order to prevent the cylinder composed of the arc plate 105 from being stretched when the reverse water pressure is too large, the pressure-resistant device includes: an inclined plate 124 arranged in the first limiting ring groove 115, a slide groove 125 corresponding to the inclined plate 124 opened on the mounting ring 118, a clamping block 126 arranged on both sides of the slide groove 125 and matching the inclined plate 124, and an inclined bar 127 arranged on both sides of the inclined plate 124 for engaging with the clamping block 126, the inclined bar 127 gradually tilts downward from the direction of fluid reflux, a positioning ring platform 128 is provided on the arc plate 105, a first spring 129 is provided between the positioning ring platform 128 and the mounting ring 118, one end of the first spring 129 abuts against the positioning ring platform 128, and the other end abuts against the mounting ring 118, and a rounded corner 138 is provided on the clamping block 126.

[0032] In order to prevent impurities from flowing into the meter and enhance the stability of the arc plate 105 after assembly, a third limiting ring groove 130 is further provided on the arc plate 105, a filter ring 131 is provided in the third limiting ring groove 130, and a filter 132 is provided in the filter ring 131.

[0033] In order to prevent unauthorized personnel from opening and closing the ball valve and affecting the meter, a locking device is further provided between the valve body 101 and the ball valve stem 103 to prevent unauthorized personnel from rotating the ball valve stem. The locking device includes: four first locking holes 133 evenly distributed on the valve body 101, a protective cover 134 fixedly connected to the ball valve stem 103, a second locking hole 135 corresponding to the first locking hole 133 provided on the protective cover 134, a locking magnet 136 that can slide up and down and is arranged in the first locking hole 133 and the second locking hole 135, and a second spring 137 arranged in the first locking hole 133, one end of the second spring 137 abuts against the locking magnet 136 and the other end abuts against the bottom of the first locking hole 133.

[0034] Working principle: During assembly, the filter screen 132, ring 131, valve seat ring 117, mounting ring 118, first spring 129 and telescopic tube 106 are placed in any curved plate 105 in sequence. After placement, the components are aligned and the other curved plate 105 is docked with the curved plate 105. Then, the cylindrical body formed by the curved plates 105 can be locked on the valve body 101 through the connecting threads on the extension plate 107, thereby completing the combined installation of the curved plates 105.

[0035] During installation, the user first installs one end of the valve body 101 on the water pipe, then pulls out the telescopic tube 106 and installs the other end on the water pipe through the nut 113 to complete the installation.

[0036] In use, the user turns the protective cover 134 and the ball valve stem 103 with the opening and closing key, causing the valve ball 104 to rotate. The fluid flows towards the filter screen 132, and then pushes the valve plate 121 to move and open the valve seat, so as to flow into the water delivery pipeline. When the user closes the valve ball 104 and causes the fluid to flow back, the flowing-back fluid will generate a certain impact force on the cylinder body composed of the valve plate 121, the mounting ring 118 and the arc-shaped plate 105. At this time, the mounting ring 118 will move towards one end close to the valve body 101 under the action of the impact force and the first spring 129, so that the pressing block 126 cooperates with the inclined strip 127, thereby tightening the two arc-shaped plates 105 and further enhancing the sealing performance to prevent fluid leakage.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A multi-functional pre-meter valve, comprising: Valve body, fluid passage opened on the valve body, ball valve stem rotatably arranged on the valve body, valve ball arranged in the valve body, one end of the ball valve stem located in the valve body is engaged with the valve ball, and it is characterized in that: an expansion check device is further arranged on the valve body for positioning the valve ball and preventing the reverse flow of fluid from affecting the meter; The expansion check device includes: two symmetrically arranged arc-shaped plates, a sealing combination device arranged between the arc-shaped plates, a telescopic tube telescopically arranged in the arc-shaped plates through a limit sliding device, and a check device arranged in the arc-shaped plates, and the arc-shaped plates can be spliced into a cylinder; The check device includes: a first limit ring groove opened on the arc-shaped plate, a second limit ring groove opened on the arc-shaped plate, a valve seat ring arranged in the second limit ring groove, an installation ring arranged in the first limit ring groove through a compression resistance device, a sliding sleeve arranged on the installation ring, a check valve stem slidably arranged in the sliding sleeve, and a valve plate arranged on the check valve stem; The compression resistance device includes: an inclined plate arranged in the first limit ring groove, a sliding groove opened on the installation ring corresponding to the inclined plate, pressing blocks arranged on both sides of the sliding groove and matching with the inclined plate, inclined strips arranged on both sides of the inclined plate for engaging with the pressing blocks, the inclined strips are gradually inclined downward from the direction of fluid backflow, a positioning ring platform is arranged on the arc-shaped plate, and a first spring is arranged between the positioning ring platform and the installation ring, one end of the first spring abuts against the positioning ring platform, and the other end abuts against the installation ring.

2. The multi-functional valve before meter according to claim 1, characterized in that: The sealing combination device includes: an extension plate arranged on the arc-shaped plate, connection threads opened on the extension plate for threadedly connecting with the valve body, and a sealing layer arranged at the butt joint of the two arc-shaped plates.

3. The multi-functional pre-meter valve according to claim 1, characterized in that: The limit sliding device includes: a first limit ring platform arranged on the telescopic tube, the first limit ring platform matches the inner diameter of the arc-shaped plate, and a second limit ring platform for engaging with the first limit ring platform is further arranged on the arc-shaped plate.

4. The multi-functional pre-meter valve according to claim 3, wherein: A circlip groove is further opened on the telescopic tube, a circlip is arranged in the circlip groove, a nut is sleeved on the telescopic tube, and a third limit ring platform for engaging with the circlip is arranged on the nut.

5. The multifunctional valve before the meter according to claim 1, characterized in that: A third limit ring groove is further arranged on the arc-shaped plate, a filter screen ring is arranged in the third limit ring groove, and a filter screen is arranged in the filter screen ring.

6. The multifunctional pre-meter valve according to claim 1, characterized in that: A locking device for preventing unauthorized personnel from rotating the valve stem is further arranged between the valve body and the ball valve stem.

7. The multi-functional valve in front of the meter according to claim 6, characterized in that: The locking device includes: four first locking holes evenly opened on the valve body, a protective cover fixedly connected with the ball valve stem, second locking holes opened on the protective cover corresponding to the first locking holes, locking magnets slidably arranged up and down in the first locking holes and the second locking holes, and a second spring arranged in the first locking holes, one end of the second spring abuts against the locking magnet and the other end abuts against the bottom of the first locking hole.

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