Multifunctional meter front valve

Abstract

The invention relates to the technical field of valves, in particular to a multifunctional meter front valve which comprises a valve body, a fluid channel formed in the valve body, a ball valve rod rotatably arranged on the valve body and a valve ball arranged in the valve body. The valve body is further provided with a telescopic non-return device used for positioning the valve ball and preventing fluid from flowing reversely and affecting the meter.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a multifunctional pre-meter valve. Background Art

[0002] At present, it is usually necessary to install a wide variety of valves with various functions in front of the meter in the piping system, such as ball valves, filter valves, pressure reducing valves and check valves, so that it has the functions of opening and closing, non-return, etc., so as to protect the meter and improve the accuracy. However, if so many single-function valves are installed in series in front of the meter, the problem of too long pipeline length will arise, which not only brings inconvenience to installation and maintenance, but also easily increases leakage points, takes up a large installation space and spends more installation time. Summary of the invention

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

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is to provide a multifunctional pre-meter valve, including: a valve body, a fluid channel opened on the valve body, a ball valve stem rotatably arranged on the valve body, and a valve ball arranged in the valve body, wherein one end of the ball valve stem located in the valve body is engaged with the valve ball, and the characteristic is that a telescopic check device is also arranged on the valve body to position the valve ball and prevent the backflow of the fluid from affecting the meter.

[0005] A further improvement is that the telescopic check device includes: two symmetrical arc plates, a sealing assembly device arranged between the arc plates, a telescopic tube that can be telescopically arranged in the arc plates through a limiting sliding device, and a check device arranged in the arc plates. The arc plates can be spliced ​​into a cylinder.

[0006] A further improvement is that the sealing assembly comprises: an extension plate arranged on the arc plate, a connecting thread provided on the extension plate for threaded connection with the valve body, and a sealing layer arranged at the joint of the two arc plates.

[0007] A further improvement is that the limit sliding device includes a first limit ring set on the telescopic tube, the first limit ring matches the inner diameter of the arc plate, and the arc plate is also provided with a second limit ring for engaging with the first limit ring.

[0008] A further improvement is that: a retaining ring groove is provided on the telescopic tube, a retaining ring is arranged in the retaining ring groove, a nut is sleeved on the telescopic tube, and a third limiting ring platform engaged with the retaining ring is arranged on the nut.

[0009] Further improvement is that: the check device includes: a first limiting ring groove opened on the arc plate, a second limiting ring groove opened on the arc plate, a valve seat ring arranged in the second limiting ring groove, and an installation ring arranged in the first limiting ring groove through a pressure-resistant device, a sliding sleeve is arranged on the installation ring, a check valve stem is slidably arranged in the sliding sleeve, and a valve plate is arranged on the check valve stem.

[0010] A further improvement is that the pressure-resistant device includes: an inclined plate arranged in the first limiting ring groove, a slide groove opened on the mounting ring and corresponding to the inclined plate, clamping blocks arranged on both sides of the slide groove and matching the inclined plate, and inclined strips arranged on both sides of the inclined plate for engaging with the clamping blocks, wherein the inclined strips gradually tilt downward from the direction of fluid reflux, a positioning ring platform is arranged on the arc plate, a first spring is arranged 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] A further improvement is that: a third limiting ring groove is further provided on the arc-shaped plate, a filter mesh ring is provided in the third limiting ring groove, and a filter mesh is provided in the filter mesh ring.

[0012] A further improvement is that a locking device is provided between the valve body and the valve stem of the ball valve to prevent unauthorized persons from rotating the valve stem.

[0013] Further improvement is that: the locking device includes: four first locking holes evenly distributed on the valve body, a protective cover fixedly connected to the valve stem of the ball valve, a second locking hole opened on the protective cover and corresponding to the first locking hole, a locking magnet block that can slide up and down and is arranged in the first locking hole and the second locking hole, and a second spring arranged in the first locking hole, one end of the second spring abuts against the locking magnet 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: It has various functions and saves space. The cylinder is composed of two separate arc plates, and a telescopic tube, a check device and a filter are arranged in the cylinder, which greatly reduces the space occupied by the valve and greatly improves the convenience of use. Furthermore, each component arranged on the arc plate can be replaced, which greatly reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cross-sectional schematic diagram of a multifunctional meter front valve of the present invention; Figure 2 It is a cross-sectional schematic diagram of a multifunctional meter front valve arc plate assembly according to the present invention; Figure 3 This is a schematic diagram of a multifunctional meter front valve telescopic tube of the present invention; Figure 4This is a schematic diagram of a multifunctional meter front valve arc plate of the present invention; Figure 5 This is a schematic diagram of a multifunctional meter front valve installation ring of the present invention; Figure 6 for Figure 2 A magnified schematic diagram of the middle part; In the figure: 101, valve body; 102, fluid channel; 103, ball valve stem; 104, valve ball; 105, arc plate; 106, telescopic tube; 107, extension plate; 108, sealing layer; 109, first limiting ring platform; 110, second limiting ring platform; 111, retaining ring groove; 112, retaining 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 ring Movable sleeve; 120, check valve stem; 121, valve plate; 122, rubber pad; 123, third spring; 124, tilting plate; 125, slide groove; 126, clamping block; 127, tilting strip; 128, positioning ring platform; 129, first spring; 130, third limiting ring groove; 131, filter ring; 132, filter; 133, first locking hole; 134, protective cover; 135, second locking hole; 136, locking magnet; 137, second spring; 138, fillet. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0017] like Figure 1-Figure 6 As shown, a multifunctional pre-meter valve comprises: a valve body 101, a fluid channel 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, wherein one end of the ball valve stem 103 located in the valve body 101 is engaged with the valve ball 104, and the characteristic is that: a telescopic check device is also arranged on the valve body 101 for positioning the valve ball 104 and preventing the backflow of the fluid from affecting the meter.

[0018] In order to improve the functionality of the valve and reduce its length, the telescopic check device includes: two symmetrical arc plates 105, a sealing combination device arranged between the arc plates 105, a telescopic tube 106 that can be telescopically arranged in the arc plate 105 through a limiting sliding device, and a check device arranged in the arc plate 105. The arc plates 105 can be spliced ​​into a cylinder.

[0019] In order to prevent water leakage after the arc plates 105 are combined, the sealing assembly device includes: an extension plate 107 arranged on the arc plate 105, a connecting 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 joint of the two arc plates 105, and the sealing layer 108 is a rubber layer.

[0020] In order to facilitate the installation of the telescopic tube 106, the limiting sliding device includes: a first limiting ring 109 arranged on the telescopic tube 106, the first limiting ring 109 matches the inner diameter of the arc plate 105, and the arc plate 105 is also provided with a second limiting ring 110 for engaging with the first limiting ring 109.

[0021] In order to facilitate the connection of the telescopic tube 106 with the water pipeline, a retaining spring groove 111 is provided on the telescopic tube 106, a retaining spring 112 is arranged in the retaining spring groove 111, a nut 113 is sleeved on the telescopic tube 106, and a third limiting ring 114 engaged with the retaining spring 112 is arranged on the nut 113.

[0022] In order to prevent the fluid from flowing back and affecting the meter, the check device includes: a first limiting ring groove 115 opened on the arc plate 105, a second limiting ring groove 116 opened on the arc plate 105, a valve seat ring 117 arranged in the second limiting ring groove 116, and an installation ring 118 arranged in the first limiting ring groove 115 through a pressure-resistant device, a sliding sleeve 119 is arranged on the installation ring 118, a check valve stem 120 is slidably arranged in the sliding sleeve 119, and a valve plate 121 is arranged on the check valve stem 120.

[0023] In order to further improve the non-return effect, a rubber pad 122 is provided on the valve plate 121 , and a third spring 123 is sleeved on the non-return valve rod 120 . One end of the third spring 123 abuts against the valve plate 121 and the other end abuts against the sliding sleeve 119 .

[0024] In order to prevent the cylinder composed of the arc plate 105 from being stretched open when the backflow 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 opened on the mounting ring 118 and corresponding to the inclined plate 124, 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, wherein the inclined bar 127 gradually tilts downward from the direction of fluid reflux, a positioning ring platform 128 is arranged on the arc plate 105, and a first spring 129 is arranged 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 opened on the clamping block 126.

[0025] In order to prevent impurities from flowing to 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 mesh ring 131 is provided in the third limiting ring groove 130, and a filter mesh 132 is provided in the filter mesh ring 131.

[0026] In order to prevent unauthorized persons from opening and closing the ball valve and affecting the meter, a locking device is provided between the valve body 101 and the ball valve stem 103 to prevent unauthorized persons from rotating the ball valve stem. The locking device comprises: 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 and provided on the protective cover 134, a locking magnet 136 which can slide up and down and is provided in the first locking hole 133 and the second locking hole 135, and a second spring 137 provided in the first locking hole 133, wherein 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.

[0027] Working principle: During assembly, the filter screen 132 ring 131, the valve seat ring 117, the mounting ring 118, the first spring 129 and the telescopic tube 106 are placed in any arc plate 105 in sequence. After the placement is completed, the components are aligned to dock the other arc plate 105 with the arc plate 105. Then, the cylinder composed of the arc 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 arc plates 105; During installation, the user first installs one end of the valve body 101 on the water pipeline, then pulls out the telescopic tube 106 and installs the other end on the water pipeline through the nut 113, thereby completing the installation; When in use, the user uses the opening and closing key to rotate the protective cover 134 and the ball valve stem 103, so that the valve ball 104 rotates, the fluid flows to the filter screen 132, and then pushes the valve plate 121 to move and open the valve seat, so that it flows to the water supply pipeline. When the user closes the valve ball 104 and causes the fluid to flow back, the backflowing fluid will produce a certain impact force on the cylinder composed of the valve plate 121, the mounting ring 118 and the arc plate 105. At this time, the mounting ring 118 will move toward the end close to the valve body 101 under the action of the impact force and the first spring 129, so that the clamping block 126 cooperates with the inclined bar 127, thereby tightening the two arc plates 105, further enhancing the sealing performance and preventing fluid leakage.

[0028] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A multifunctional meter front valve, comprising: A valve body, a fluid channel opened on the valve body, a ball valve stem rotatably arranged on the valve body, and a valve ball arranged in the valve body, wherein one end of the ball valve stem located in the valve body is engaged with the valve ball, and the valve body is characterized in that: a telescopic check device is also arranged on the valve body for positioning the valve ball and preventing the backflow of the fluid from affecting the meter; The telescopic check device comprises: two symmetrical arc plates, a sealing assembly device arranged between the arc plates, a telescopic tube telescopically arranged in the arc plates through a limiting sliding device, and a check device arranged in the arc plates. The arc plates can be spliced ​​into a cylinder.

2. A multifunctional pre-meter valve according to claim 1, characterized in that: The sealing assembly device comprises: an extension plate arranged on the arc plate, a connecting thread opened on the extension plate for threaded connection with the valve body, and a sealing layer arranged at the joint of the two arc plates.

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

4. A multifunctional pre-meter valve according to claim 3, characterized in that: The telescopic tube is also provided with a retaining ring groove, in which a retaining ring is arranged, the telescopic tube is sleeved with a nut, and the nut is provided with a third limiting ring platform engaged with the retaining ring.

5. The multifunctional pre-meter valve according to claim 1, characterized in that: The check device includes: a first limiting ring groove opened on the arc plate, a second limiting ring groove opened on the arc plate, a valve seat ring arranged in the second limiting ring groove, and an installation ring arranged in the first limiting ring groove through a pressure-resistant device, a sliding sleeve is arranged on the installation ring, a check valve stem is slidably arranged in the sliding sleeve, and a valve plate is arranged on the check valve stem.

6. A multifunctional pre-meter valve according to claim 5, characterized in that: The pressure-resistant device includes: an inclined plate arranged in a first limiting ring groove, a slide groove opened on the mounting ring and corresponding to the inclined plate, clamping blocks arranged on both sides of the slide groove and matching the inclined plate, and inclined bars arranged on both sides of the inclined plate for engaging with the clamping blocks, wherein the inclined bars are gradually inclined downward from the direction of fluid reflux, a positioning ring platform is arranged on the arc-shaped plate, a first spring is arranged 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.

7. The multifunctional pre-meter valve according to claim 1, characterized in that: The arc-shaped plate is also provided with a third limiting ring groove, a filter mesh ring is provided in the third limiting ring groove, and a filter mesh is provided in the filter mesh ring.

8. The multifunctional pre-meter valve according to claim 1, characterized in that: A locking device is also provided between the valve body and the ball valve stem to prevent unauthorized persons from rotating the valve stem.

9. The multifunctional pre-meter valve according to claim 8, characterized in that: The locking device includes: four first locking holes evenly distributed on the valve body, a protective cover fixedly connected to the valve stem of the ball valve, a second locking hole corresponding to the first locking hole and opened on the protective cover, a locking magnet that can slide up and down and is arranged in the first locking hole and the second locking hole, and a second spring arranged in the first locking hole, wherein 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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