Check valve capable of being installed in any direction

Abstract

The invention belongs to the technical field of check valves, particularly relates to a check valve capable of being mounted in any direction, and aims to solve the problem that a transmission mechanism for controlling a valve core to rotate is bent due to pressure difference of a valve body in the same direction for a long time. An annular flushing groove is formed in the middle of the circumferential inner wall of the valve body shell; a first round hole and a stepped through hole which are coaxial are formed in the two ends of the valve body shell correspondingly, and a driving abutting ring is detachably and fixedly connected into the stepped through hole. According to the valve, it can be guaranteed that the space of one end of the valve body shell is large enough before the hollow spherical shell is installed so that installation can be carried out conveniently, the two melon rind core petals, distributed in a central symmetry mode, of the hollow spherical shell play a role in balancing the pressure difference, and the hollow spherical shell can be kept stable all the time; and the non-return mechanism which can be detached and reversely mounted enables the device to be more flexible to mount and convenient to overhaul and maintain.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, and in particular to a check valve that can be installed in any direction. Background Art

[0002] The check valve belongs to the category of automatic valves, which are mainly used in pipes where fluid media flows in one direction. Its function is to allow the fluid media to flow in one direction only. For example, in sewage treatment system applications, it is necessary to prevent water from flowing back into the water supply pipe. It is also necessary to ensure that the fluid in the pipe will not flow back due to changes in system pressure, causing pollution or damage to the equipment to prevent accidents. The check valve in the prior art needs to be installed strictly according to the direction instructions because its internal check system and valve body are integrally formed. In addition, in some cases where the internal pressure difference is large, the pressure difference on both sides of the valve core is too large for a long time, which can easily cause the transmission mechanism used to control the rotation of the valve core to bend, thereby affecting the sealing effect. Therefore, we propose a check valve that can be installed in any direction to solve the problem that the transmission mechanism that controls the rotation of the valve core will bend due to the pressure difference in the same direction for a long time. Summary of the invention

[0003] In order to solve the technical problem that the pressure difference in the same direction in the valve body for a long time may cause bending of the transmission mechanism controlling the rotation of the valve core, the present invention adopts the following technical solution: A check valve that can be installed in any direction, comprising a valve body shell of a horizontally placed cylindrical tubular structure, wherein the circumferential inner wall of the valve body shell is provided with an annular flushing groove in the middle; and the two ends of the valve body shell are respectively provided with a coaxial circular hole 1 and a stepped through hole, wherein an active collar is detachably and fixedly connected in the stepped through hole, and the inner diameter of the active collar is the same as the aperture of the circular hole 1; the active collar and the circular hole 1 are respectively provided with spherical grooves 1 that are centrally symmetrical and concentric with each other at one end opposite to the other, and the same hollow spherical shell is rotatably connected between the two spherical grooves 1; the hollow spherical shell comprises two melon peel core petals that are centrally symmetrically distributed with each other and a single-sided spherical surface fixed at both ends of the two melon peel core petals. Connecting plate, the two single-sided spherical connecting plates are distributed symmetrically with each other in the center; a control extension tube connected to the inside of the annular flushing groove is reserved near the rear side of the circumferential outer wall of the valve body shell, and a transmission mechanism is arranged in the control extension tube to control the rotation of the hollow spherical shell, and then to open and close the valve; a non-return mechanism is fixed by bolts at the pipe mouth of the end of the active abutment ring away from the hollow spherical shell, and the non-return mechanism includes a two-way mounting ring fixed at the pipe mouth of the active abutment ring in an annular structure, a conical spring is fixed near the middle of the circumferential inner wall of the two-way mounting ring, and a sealing cover is fixed at one end of the conical spring close to the hollow spherical shell, and the diameter of the sealing cover is larger than the inner diameter of the two-way mounting ring.

[0004] A further configuration of the present invention is that eight symmetrical external protruding column heads are reserved on the circumferential outer wall of the valve body shell, and the center lines of all the external protruding column heads are parallel to each other, and the axis lines of the external protruding column heads are skewed and perpendicular to the axis line of the control extension tube; threaded lock holes are opened at the ends of the external protruding column heads away from the valve body shell, and the top ends of the four external protruding column heads near the top are screwed with lifting rings; the other four external protruding column heads constitute the supporting feet of the device; by setting the external protruding column heads, the device can be easier to hoist and assist in centering during installation and transportation, thereby making the installation more labor-saving.

[0005] A further configuration of the present invention is that a discharge hole is opened near the middle of the bottom of the circumferential outer wall of the valve body shell, and an externally threaded cylindrical plug is screwed in the discharge hole; a gap is left between the circumferential inner wall of the discharge hole and the outer wall of the hollow spherical shell, and when the hollow spherical shell is in the valve-open state, the interior of the hollow spherical shell, that is, the fluid cavity that normally passes through, is isolated from the inner cavity of the discharge hole.

[0006] A further configuration of the present invention is that the center angle of the melon peel core petal is equal to 105 degrees; and a centripetally distributed self-locking screw hole is opened in the middle of the single-sided spherical connecting plate away from one end of the control extension tube, and a telescopic shaft is screwed in the self-locking screw hole; and the bottom of the annular flushing groove is located at the end of the telescopic shaft and has a coaxial limit hole; the telescopic shaft includes an external threaded sleeve that is screwed in the self-locking screw hole and has an opening toward the coaxial limit hole and is an overall barrel-shaped structure, and an inner sliding shaft is slidably inserted into the inner wall of the opening of the external threaded sleeve, and a tightening spring is fixed between the inner sliding shaft and the barrel bottom.

[0007] A further configuration of the present invention is that a stepped annular groove 1 connected to the spherical groove 1 is formed at one end opposite to the active abutting ring and the circular hole 1, and spring countersunk holes equidistantly distributed are formed on the vertical annular surfaces of the two stepped annular grooves 1, and compression springs capable of freely contracting are slidably clamped in the spring countersunk holes; a symmetrical clamping ring 1 and a clamping ring 2 are respectively slidably connected in the two stepped annular grooves 1; a spherical groove 2 which is concentric and has the same radius as the spherical groove is formed at one end of the clamping ring 1 and the clamping ring 2 which is close to the hollow spherical shell; a trapezoidal clamping groove is formed on the circumferential outer wall of the clamping ring 1 and the clamping ring 2, and flexible graphite rings of annular structure are sleeved in the two trapezoidal clamping grooves; the outer surface of the melon peel core petal can be always pressed with pressure during the frequent rotation of the hollow spherical shell, thereby improving the effect of scraping impurities on its surface.

[0008] A further configuration of the present invention is that an annular convex edge is reserved on the circumferential outer wall of the end of the active resisting ring away from the hollow spherical shell, and a plurality of bolt through holes symmetrically distributed in the center are opened on the annular convex edge, and the axial line of the bolt through holes is parallel to the axial line of the active resisting ring; an anti-slip annular groove is opened on the annular vertical surface of the stepped through hole, and a stud which is adapted to the position and diameter of the bolt through hole is fixed on the bottom of the groove of the anti-slip annular groove; an anti-slip gasket is clamped in the anti-slip annular groove; the cross-section of the anti-slip gasket is a trapezoidal structure; the active resisting ring can be tightly sealed and fixed in the stepped through hole, and the hollow spherical shell can be tightly clamped inside the valve body shell in cooperation with the spherical groove on one side of the circular hole; thereby achieving the dual advantages of convenient installation and stable operation.

[0009] A further configuration of the present invention is that an annular burr is reserved at the circumferential edge of the bidirectional mounting ring, and a through hole is opened on the annular burr and is centrally symmetrically distributed, and the aperture of the through hole is the same as the aperture of the bolt through hole; the bidirectional mounting ring in the anti-return mechanism can be installed while the active counter ring is fixed.

[0010] The present invention is further configured in that an anti-twisting pin hole is provided at one end of the hollow spherical shell close to the control extension tube; sealing ring grooves are provided on the inner walls of the openings at both ends of the control extension tube, and the transmission mechanism includes a docking shaft inserted in the anti-twisting pin hole, a prism insert is reserved at one end of the docking shaft away from the hollow spherical shell, and a tension spring is fixed at the end of the prism insert, a locking disc is fixed at one end of the tension spring away from the prism insert, and two rectangular pins are reserved on the outer wall of one end of the docking shaft close to the anti-twisting pin hole and are symmetrically distributed with respect to the center; and the end of the docking shaft close to the prism insert slides A tightening and clamping sleeve is inserted; an anti-twist square hole that forms a sliding fit with the prismatic insert is opened at one end of the tightening and clamping sleeve close to the docking shaft, and a backstop tooth that is compatible with the locking disc is reserved on the inner wall of the other end of the tightening and clamping sleeve; the backstop teeth are distributed in an interval manner on the inner wall of the tightening and clamping sleeve; annular ridges 1 and 2 are reserved on the circumferential outer walls of the docking shaft and the tightening and clamping sleeve near the corresponding sealing ring grooves; and tightening sealing rings are slidably clamped in the two sealing ring grooves; the two tightening sealing rings are respectively located between the annular ridges 1 and 2.

[0011] A further configuration of the present invention is that a self-locking internal thread II is formed on the circumferential inner wall of one end of the clamping sleeve away from the anti-twist square hole; and a sealing cover is screwed internally on the second self-locking internal thread; the backstop teeth are divided into two gears, and a hook is fixed on the side of the locking disc close to the sealing cover; when the sealing effect needs to be improved to cope with greater internal pressure, the hook can be pulled outward to increase the gear, that is, the tensioning spring can be further lengthened to increase the extrusion force on the two clamping sealing rings, thereby improving the sealing effect.

[0012] A further configuration of the present invention is that a dustproof fixing box with an opening facing outward and an overall strip-shaped barrel structure is fixed to one end of the control extension tube away from the inner part of the valve body shell, and the surface where the barrel bottom of the dustproof fixing box is located is perpendicular to the center line of the hole of the control extension tube; a side cover is fixed to the opening of the dustproof fixing box; and a driving mechanism is arranged in the dustproof fixing box; and the driving mechanism includes a driving gear key-connected to the circumferential outer wall of the abutment sleeve; and the inner wall of the dustproof fixing box is provided with a side surface close to the driving gear that is abutted against the abutment sleeve. A shaft parallel to the axis line of the valve, and a small gear meshing with the driving gear is sleeved on the shaft; a driven worm gear is fixed to the end of the shaft away from the valve body shell; a bearing seat is embedded in the top of the dustproof fixed box, and a transmission rod extending vertically upward is fixed in the bearing seat, and a worm sleeve meshing with the driven worm gear is fixed to the bottom end of the transmission rod; a turntable is fixed to the top of the transmission rod; it can not only have a reverse self-locking effect, but also save effort when opening the valve, and it is easier to control a small opening and closing degree.

[0013] The beneficial effects of the present invention are: 1. By providing an active retaining ring fixed in the stepped through hole and a non-return mechanism fixed at the end of the active retaining ring, not only can the space at one end of the valve body shell be ensured to be large enough for installation before installing the hollow spherical shell, but also the two melon-skin core petals of the hollow spherical shell distributed symmetrically at the center play a role in balancing the pressure difference, so that the hollow spherical shell always remains stable; and the non-return mechanism that can be disassembled and reversely installed makes the installation of the device more flexible and convenient for inspection and maintenance.

[0014] 2. By setting up a hollow spherical shell that can isolate the annular flushing groove, not only can the threat posed by the fluid pressure to the sealing effect of the transmission mechanism under normal conditions be reduced, but also the internal waste residue can be cleaned by opening the external threaded cylindrical plug in both the normally open state and the normally closed state, which brings convenience to the maintenance of the equipment.

[0015] 3. By setting the tension spring between the docking shaft and the clamping sleeve, the outer wall of the transmission mechanism can be well sealed during rotation, thereby preventing the fluid inside the valve body from overflowing through the control extension pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a check valve that can be installed in any direction proposed by the present invention; Figure 2 A top view of a check valve that can be installed in any direction proposed by the present invention; Figure 3 A check valve that can be installed in any direction proposed by the present invention Figure 2 Schematic diagram of the cross-sectional structure along line AA; Figure 4 A top perspective view of a check valve that can be installed in any direction proposed by the present invention; Figure 5 A side view of a check valve that can be installed in any direction in a closed state proposed by the present invention; Figure 6 A check valve that can be installed in any direction proposed by the present invention Figure 5 The schematic diagram of the cross-sectional structure along the BB line; Figure 7 A schematic diagram of a partial cross-sectional structure of a check valve that can be installed in any direction in an open state proposed by the present invention; Figure 8 This is a schematic diagram of a longitudinal cross-sectional structure of a check valve that can be installed in any direction proposed by the present invention; Fig. 9 This is a schematic diagram of the assembly structure of a clamping ring and a driving mechanism in a check valve that can be installed in any direction proposed by the present invention; Fig.10 This is a schematic diagram of the exploded structure of a hollow spherical shell and a transmission mechanism in a check valve that can be installed in any direction proposed by the present invention; Fig.11 A 1 / 4 cross-sectional view of a clamping sleeve in a check valve that can be installed in any direction proposed by the present invention; Fig.12 This is a schematic diagram of the three-dimensional structure of a docking shaft in a check valve that can be installed in any direction proposed by the present invention; Fig.13 The half-section structure schematic diagram of the non-return mechanism of a non-return valve which can be installed in any direction proposed by the present invention.

[0017] In the figure: 1. Valve body shell; 101. External protruding column head; 102. Round hole 1; 103. Annular flushing groove; 104. Step through hole; 105. Control extension tube; 106. Anti-drop annular groove; 107. Stud; 108. Step annular groove 1; 109. Discharge hole; 110. Coaxial limit hole; 111. Sealing ring groove; 2. Externally threaded cylindrical plug; 3. Active abutment ring; 301. Bidirectional mounting ring; 302. Conical spring; 303. Cover; 4. Lifting ring; 5. Transmission rod; 6. Turntable; 7. Dustproof fixing box; 701. Side cover; 8. Tightening ring 1; 9. Telescopic shaft; 901. Externally threaded sleeve; 902. Inner sliding shaft; 10. Tightening ring Ring 2; 11. Compression spring; 12. Hollow spherical shell; 121. Self-locking screw hole; 122. Anti-twist pin hole; 13. Docking shaft; 131. Annular ridge 1; 132. Rectangular pin strip; 133. Prismatic insert strip; 134. Tension spring; 135. Locking disc; 14. Driving mechanism; 141. Worm sleeve; 142. Driven worm wheel; 143. Shaft; 144. Driving gear; 145. Pinion 1; 15. Tightening sleeve; 151. Annular ridge 2; 152. Backstop gear; 153. Self-locking internal thread 2; 154. Anti-twist square hole; 16. Anti-slip gasket; 17. Flexible graphite ring; 18. Sealing cover; 19. Tightening sealing ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] In the present invention, reference is made to Figure 1-13A check valve that can be installed in any direction includes a valve body shell 1 that is a horizontal cylindrical tubular structure as a whole, and an annular flushing groove 103 is opened in the middle of the circumferential inner wall of the valve body shell 1; and the two ends of the valve body shell 1 are respectively opened with a coaxial circular hole 102 and a stepped through hole 104, and an active ring 3 is fixed in the stepped through hole 104 by bolts, and the inner diameter of the active ring 3 is the same as the aperture of the circular hole 102; the active ring 3 and the circular hole 102 are respectively opened at the opposite ends thereof, and the ball holes 102 are symmetrical and concentric with each other. The hollow spherical shell 12 comprises two melon peel core petals which are centrally symmetrically distributed to each other and a single-sided spherical connecting plate fixed to the two ends of the two melon peel core petals, and the two single-sided spherical connecting plates are centrally symmetrically distributed to each other; one melon peel core petal can completely block the opening of one spherical groove; the outer circumferential wall of the valve body shell 1 is reserved near the rear side with a control extension pipe 105 which is connected to the inside of the annular flushing groove 103, and the control extension pipe 105 is provided with The transmission mechanism is used to control the rotation of the hollow spherical shell 12, and then to open and close the valve. The active ring 3 is fixed with a non-return mechanism at the pipe mouth of the end away from the hollow spherical shell 12 by bolts, and the non-return mechanism includes a two-way mounting ring 301 in an annular structure fixed at the pipe mouth of the active ring 3, a conical spring 302 is fixed near the middle of the circumferential inner wall of the two-way mounting ring 301, and a sealing cover 303 is fixed at one end of the conical spring 302 close to the hollow spherical shell 12, and the diameter of the sealing cover 303 is larger than that of the two-way mounting ring 30 1, by providing an active collar 3 inserted and fixed in the stepped through hole 104 and a non-return mechanism fixed to the end of the active collar 3, not only can the space at one end of the valve body housing 1 be ensured to be large enough for installation before the hollow spherical shell 12 is installed, but also the two melon-skin core petals of the hollow spherical shell 12 which are symmetrically distributed at the center play a role in balancing the pressure difference, so that the hollow spherical shell 12 always remains stable; and the non-return mechanism which can be disassembled and reversely installed makes the installation of the device more flexible and convenient for inspection and maintenance.

[0020] In the present invention, eight mutually symmetrical external protruding column heads 101 are reserved on the circumferential outer wall of the valve body shell 1, and the center lines of all the external protruding column heads 101 are parallel to each other, and the axis line of the external protruding column head 101 is perpendicular to the axis line of the control extension tube 105; the end of the external protruding column head 101 away from the valve body shell 1 is provided with a threaded lock hole, and the top ends of the four external protruding column heads 101 near the top are screwed with lifting rings 4; the other four external protruding column heads 101 constitute the supporting feet of the device; by setting the external protruding column heads 101, the device can be easier to hoist and assist in centering during installation and transportation, thereby making the installation more labor-saving.

[0021] Reference Fig.10A discharge hole 109 is opened on the circumferential outer wall of the valve body shell 1 near the middle of the bottom, and an externally threaded cylindrical plug 2 is screwed into the discharge hole 109; a gap is left between the circumferential inner wall of the discharge hole 109 and the outer wall of the hollow spherical shell 12. When the hollow spherical shell 12 is in the valve-open state, the interior of the hollow spherical shell 12, that is, the fluid cavity that normally passes through, is isolated from the inner cavity of the discharge hole 109. Through this arrangement, not only can the threat of fluid pressure to the sealing effect of the transmission mechanism under normal conditions be reduced, but also the internal waste residue can be cleaned by opening the externally threaded cylindrical plug 2 in both the normally open state and the normally closed state, which brings convenience to the maintenance of the equipment.

[0022] Reference Figure 7-Figure 8 , Fig.10 , the center angle of the melon peel core petal is equal to 105 degrees; and a self-locking screw hole 121 distributed centripetally is opened in the middle of the unilateral spherical connecting plate away from one end of the control extension tube 105, and a telescopic shaft rod 9 is screwed in the self-locking screw hole 121; and the bottom of the annular flushing groove 103 is located at the end of the telescopic shaft rod 9 and is provided with a coaxial limiting hole 110; the telescopic shaft rod 9 includes an external threaded sleeve 901 which is screwed in the self-locking screw hole 121 and has an opening facing the coaxial limiting hole 110 and is in a barrel-shaped structure as a whole, and an inner sliding shaft 902 is slidably inserted into the inner wall of the opening of the external threaded sleeve 901, and a tightening spring is fixed between the inner sliding shaft 902 and the bottom of the barrel; by setting the telescopic shaft rod 9, the stability of the hollow spherical shell 12 during rotation can be enhanced.

[0023] Reference Figure 7 and Fig.10 The active collar 3 and the circular hole 102 have a stepped annular groove 108 connected to the spherical groove 1 at one end opposite to the circular hole 102, and the vertical annular surfaces of the two stepped annular grooves 108 have spring countersunk holes distributed at equal distances, and the spring countersunk holes are slidably connected with a compression spring 11 that can shrink freely; the two stepped annular grooves 108 are respectively slidably connected with a symmetrical tightening ring 18 and a tightening ring 2 10; the tightening ring 18 and the tightening ring 2 10 are close to the hollow spherical shell 12. One end of each of the two balls is provided with a spherical groove 2 which is concentric and has the same radius as the spherical groove; the circumferential outer walls of the tightening ring 1 8 and the tightening ring 2 10 are provided with a trapezoidal groove, and the two trapezoidal grooves are both sleeved with a flexible graphite ring 17 of an annular structure; by providing the tightening ring 1 8 and the tightening ring 2 10 with the flexible graphite ring 17, the outer surface of the melon peel core petal can be always pressed with pressure during the frequent rotation of the hollow spherical shell 12, thereby improving the effect of scraping impurities on its surface.

[0024] Reference Figure 7 and Fig. 9, an annular convex edge is reserved on the circumferential outer wall of one end of the active collar 3 away from the hollow spherical shell 12, and a plurality of bolt through holes symmetrically distributed in the center are opened on the annular convex edge, and the axis line of the bolt through hole is parallel to the axis line of the active collar 3; an anti-slip annular groove 106 is opened on the annular vertical surface of the stepped through hole 104, and a stud 107 which is adapted to the position and diameter of the bolt through hole is fixed to the bottom of the anti-slip annular groove 106; an anti-slip gasket 16 is clamped in the anti-slip annular groove 106; the cross-section of the anti-slip gasket 16 is a trapezoidal structure; through such an arrangement, the active collar 3 can be tightly sealed and fixed in the stepped through hole 104, and the hollow spherical shell 12 can be tightly clamped in the inside of the valve body shell 1 in cooperation with the spherical groove on one side of the circular hole 102; thereby achieving the dual advantages of convenient installation and stable operation.

[0025] Reference Fig.13 A circular burr is reserved at the circumferential edge of the bidirectional mounting ring 301, and a through hole is opened on the circular burr in a centrally symmetrical distribution, and the aperture of the through hole is the same as the aperture of the bolt through hole; through such an arrangement, the bidirectional mounting ring 301 in the anti-return mechanism can be installed while the active anti-ring 3 is fixed.

[0026] Reference Figure 3 , Figure 8 , Figure 10-12, an anti-twist pin hole 122 is formed at one end of the hollow spherical shell 12 close to the control extension tube 105; sealing ring grooves 111 are formed on the inner walls of the orifices at both ends of the control extension tube 105, and the transmission mechanism includes a docking shaft 13 inserted in the anti-twist pin hole 122, and a prism insert 133 is reserved at one end of the docking shaft 13 away from the hollow spherical shell 12, and a tensioning spring 134 is fixed at the end of the prism insert 133, and a locking disc 135 is fixed at one end of the tensioning spring 134 away from the prism insert 133, and two rectangular pins 132 are reserved on the outer wall of one end of the docking shaft 13 close to the anti-twist pin hole 122 and are symmetrically distributed with each other; and a clamping sleeve 15 is slidably inserted at one end of the docking shaft 13 close to the prism insert 133; a clamping sleeve 15 is formed at one end close to the docking shaft 13 to form a sliding connection with the prism insert 133 The anti-twist square hole 154 is matched, and the inner wall of the other end of the tight-fitting sleeve 15 is reserved with a back-stop tooth 152 which is compatible with the locking disc 135; the back-stop tooth 152 is distributed in an interval manner on the inner wall of the tight-fitting sleeve 15; the circumferential outer walls of the docking shaft 13 and the tight-fitting sleeve 15 are respectively reserved with an annular ridge 131 and an annular ridge 2 151 near the corresponding sealing ring groove 111; and the two sealing ring grooves 111 are both slidably clamped with a back-tightening ring 19; the two back-tightening rings 19 are respectively located between the annular ridge 131 and the annular ridge 2 151, and cooperate with the tensioning spring 134 arranged between the docking shaft 13 and the tight-fitting sleeve 15, so that the outer wall of the transmission mechanism can also form a good seal when rotating; thereby preventing the fluid inside the valve body from overflowing through the control extension tube 105.

[0027] Reference Fig. 9 and Fig.11 A self-locking internal thread 153 is formed on the inner circumference of one end of the clamping sleeve 15 away from the anti-twist square hole 154; and a sealing cover 18 is threadedly connected to the self-locking internal thread 153; the back-stopping tooth 152 is divided into two gears, and a hook is fixed on the side of the locking disc 135 close to the sealing cover 18; when the sealing effect needs to be improved to cope with a greater internal pressure, the hook can be pulled outward to increase the gear, that is, the tensioning spring 134 can be further lengthened to increase the extrusion force on the two sealing rings 19, thereby improving the sealing effect.

[0028] Reference Figure 3 , Figure 8 and Fig. 9A dustproof fixed box 7 with an opening facing outward and an overall strip-shaped barrel structure is fixed to the end of the control extension tube 105 away from the inner part of the valve body shell 1, and the bottom of the dustproof fixed box 7 is perpendicular to the center line of the hole of the control extension tube 105; a side cover 701 is fixed to the opening of the dustproof fixed box 7; and a driving mechanism 14 is arranged in the dustproof fixed box 7; and the driving mechanism 14 includes a driving gear 144 key-connected to the outer wall of the circumference of the clamping sleeve 15; the inner wall of the dustproof fixed box 7 is close to the side of the driving gear 144 and is parallel to the axis of the clamping sleeve 15. 3, and a small gear 145 meshing with a driving gear 144 is sleeved on the shaft 143; a driven worm wheel 142 is fixed to the end of the shaft 143 away from the valve body housing 1; a bearing seat is embedded at the top of the dustproof fixing box 7, and a transmission rod 5 extending vertically upward is fixed in the bearing seat, and a worm sleeve 141 meshing with the driven worm wheel 142 is fixed to the bottom end of the transmission rod 5; a turntable 6 is fixed to the top of the transmission rod 5; through such an arrangement, not only can a reverse self-locking effect be achieved, but also it can save more effort when opening the valve, and it is easier to control a small opening and closing degree.

[0029] Working principle: When installing the device, first install the tightening ring 8 and the flexible graphite ring 17 near the circular hole 102, then sleeve one of the tightening sealing rings 19 on the docking shaft 13, and insert the end of the docking shaft 13 with the rectangular pin 132 on the hollow spherical shell 12, and then insert the hollow spherical shell 12 together with the docking shaft 13 from one end of the stepped through hole 14; and adjust the position of the docking shaft 13; then install the telescopic shaft 9; finally, install the active buckling ring 3 and the anti-return mechanism in place; by setting the stepped through hole 104 with a hole diameter larger than the outer diameter of the hollow spherical shell 12, and fixing it at the end of the active buckling ring 3 The non-return mechanism of the valve body ensures that the space at one end of the valve body shell 1 is large enough for installation before installing the hollow spherical shell 12, and the two melon-skin core petals of the hollow spherical shell 12, which are symmetrically distributed at the center, play a role in balancing the pressure difference, so that the hollow spherical shell 12 always remains stable; and the non-return mechanism that can be disassembled and reversely installed makes the installation of the device more flexible and convenient for inspection and maintenance; if the fluid pressure in the device becomes larger and forces the sealing effect in the control extension tube 105 to be improved to cope with the greater internal pressure, the hook is pulled outward to increase the gear position, that is, the tension spring 134 is further lengthened to increase the squeezing force on the two tight sealing rings 19; In both the normally open state and the normally closed state, the internal waste residue can be cleaned by opening the external thread cylindrical plug 2.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A check valve that can be installed in any direction, comprising a valve body shell (1) that is an overall horizontal cylindrical tubular structure, wherein the circumferential inner wall of the valve body shell (1) is provided with an annular flushing groove (103) in the middle; characterized in that: The two ends of the valve body shell (1) are respectively provided with a coaxial circular hole (102) and a stepped through hole (104); an active collar (3) is detachably fixedly connected in the stepped through hole (104); the inner diameter of the active collar (3) is the same as the aperture of the circular hole (102); the opposite ends of the active collar (3) and the circular hole (102) are respectively provided with spherical grooves (1) which are centrally symmetrical and concentric with each other; and a same hollow spherical shell (12) is rotatably connected between the two spherical grooves (1); the hollow spherical shell (12) comprises two melon peel core petals which are centrally symmetrically distributed with respect to each other and a single-sided spherical connecting plate fixed to the two ends of the two melon peel core petals, and the two single-sided spherical connecting plates are centrally symmetrically distributed with respect to each other; A control extension tube (105) connected to the inside of the annular flushing groove (103) is reserved near the rear side of the circumferential outer wall of the valve body shell (1), and a transmission mechanism is arranged in the control extension tube (105). A non-return mechanism is fixed to the pipe opening of one end of the active retaining ring (3) away from the hollow spherical shell (12) by bolts, and the non-return mechanism comprises a bidirectional mounting ring (301) in an annular structure fixed to the pipe opening of the active retaining ring (3). A conical spring (302) is fixed to the circumferential inner wall of the bidirectional mounting ring (301) near the middle, and a sealing cover (303) is fixed to one end of the conical spring (302) close to the hollow spherical shell (12), and the diameter of the sealing cover (303) is larger than the inner diameter of the bidirectional mounting ring (301).

2. A check valve that can be installed in any direction according to claim 1, characterized in that: The circumferential outer wall of the valve body shell (1) is reserved with eight symmetrical external protruding column heads (101), and the center lines of all the external protruding column heads (101) are parallel to each other, and the axis line of the external protruding column heads (101) is skewed and perpendicular to the axis line of the control extension tube (105); the end of the external protruding column heads (101) away from the valve body shell (1) is provided with a threaded lock hole, and the top ends of the four external protruding column heads (101) near the top are screwed with lifting rings (4); the other four external protruding column heads (101) constitute the support feet of the device.

3. A check valve that can be installed in any direction according to claim 2, characterized in that: A discharge hole (109) is formed in the middle of the circumferential outer wall of the valve body shell (1) near the bottom, and an externally threaded cylindrical plug (2) is screwed into the discharge hole (109); a gap is left between the circumferential inner wall of the discharge hole (109) and the outer wall of the hollow spherical shell (12); when the hollow spherical shell (12) is in an open valve state, the interior of the hollow spherical shell (12), i.e., the cavity through which the fluid normally passes, is isolated from the inner cavity of the discharge hole (109).

4. A check valve that can be installed in any direction according to claim 1, characterized in that: The center angle of the melon peel core petal is equal to 105 degrees; a self-locking screw hole (121) distributed centripetally is opened in the middle of the single-sided spherical connecting plate away from one end of the control extension tube (105), and a telescopic shaft (9) is screwed into the self-locking screw hole (121); and a coaxial limiting hole (110) is opened at the end of the telescopic shaft (9) at the bottom of the annular flushing groove (103); the telescopic shaft (9) comprises an external threaded sleeve (901) screwed into the self-locking screw hole (121) and opening toward the coaxial limiting hole (110) and forming an overall barrel-shaped structure, and an inner sliding shaft (902) is slidably inserted into the inner wall of the opening of the external threaded sleeve (901), and a tightening spring is fixed between the inner sliding shaft (902) and the barrel bottom.

5. A check valve that can be installed in any direction according to claim 1, characterized in that: The active collar (3) and the circular hole (102) are each provided with a stepped annular groove (108) connected to the spherical groove (1), and the vertical annular surfaces of the two stepped annular grooves (108) are each provided with spring countersunk holes distributed at equal distances, and the spring countersunk holes are each slidably engaged with a compression spring (11) capable of freely contracting; a clamping ring (8) and a clamping ring (10) are respectively slidably engaged in the two stepped annular grooves (108); the clamping ring (8) and the clamping ring (10) are each provided with a spherical groove (2) having the same center and radius as the spherical groove at one end close to the hollow spherical shell (12); the circumferential outer walls of the clamping ring (8) and the clamping ring (10) are each provided with a trapezoidal groove, and the two trapezoidal grooves are each sleeved with a flexible graphite ring (17) of an annular structure.

6. A check valve that can be installed in any direction according to claim 1, characterized in that: An annular convex edge is reserved on the circumferential outer wall of one end of the active collar (3) away from the hollow spherical shell (12), and a plurality of bolt through holes are provided on the annular convex edge and are centrally symmetrically distributed, and the axis of the bolt through holes is parallel to the axis of the active collar (3); an anti-slip annular groove (106) is provided on the annular vertical surface of the stepped through hole (104), and a stud (107) that is compatible with the position and diameter of the bolt through holes is fixed to the bottom of the groove of the anti-slip annular groove (106); an anti-slip washer (16) is clamped in the anti-slip annular groove (106); and the cross section of the anti-slip washer (16) is a trapezoidal structure.

7. A check valve that can be installed in any direction according to claim 1, characterized in that: An annular burr is reserved at the circumferential edge of the bidirectional mounting ring (301), and perforations are opened on the annular burr in a centrally symmetrical distribution, and the diameter of the perforations is the same as the diameter of the bolt perforations.

8. A check valve that can be installed in any direction according to claim 1, characterized in that: An anti-twist pin hole (122) is formed at one end of the hollow spherical shell (12) close to the control extension tube (105); sealing ring grooves (111) are formed on the inner walls of both end openings of the control extension tube (105); and the transmission mechanism comprises a docking shaft (13) inserted into the anti-twist pin hole (122); a prism insert (133) is reserved at one end of the docking shaft (13) away from the hollow spherical shell (12); a tension spring (134) is fixed at the end of the prism insert (133); a locking disc (135) is fixed at one end of the tension spring (134) away from the prism insert (133); two rectangular pins (132) are reserved on the outer wall of one end of the docking shaft (13) close to the anti-twist pin hole (122); and a resistance pin (132) is slidably inserted at one end of the docking shaft (13) close to the prism insert (133). A clamping sleeve (15); an anti-twist square hole (154) is opened at one end of the clamping sleeve (15) close to the docking shaft (13) to form a sliding fit with the prism insert (133), and a stop tooth (152) matching the locking disc (135) is reserved on the inner wall of the other end of the clamping sleeve (15); the stop tooth (152) is distributed in an interval manner on the inner wall of the clamping sleeve (15); an annular ridge 1 (131) and an annular ridge 2 (151) are reserved on the circumferential outer walls of the docking shaft (13) and the clamping sleeve (15) close to the corresponding sealing ring groove (111); and a clamping sealing ring (19) is slidably clamped in the two sealing ring grooves (111); the two clamping sealing rings (19) are respectively located between the annular ridge 1 (131) and the annular ridge 2 (151).

9. A check valve that can be installed in any direction according to claim 8, characterized in that: A second self-locking internal thread (153) is formed on the inner wall of the circumference of one end of the clamping sleeve (15) away from the anti-twist square hole (154); a sealing cover (18) is screwed into the second self-locking internal thread (153); the stop gear (152) is divided into two gears, and a hook is fixed on one side of the locking disc (135) close to the sealing cover (18).

10. A check valve that can be installed in any direction according to claim 1, characterized in that: A dustproof fixing box (7) with an opening facing outward and having a strip-shaped barrel structure as a whole is fixed to one end of the control extension tube (105) away from the inner part of the valve body housing (1), and the bottom surface of the dustproof fixing box (7) is perpendicular to the center line of the hole of the control extension tube (105); a side cover (701) is fixed to the opening of the dustproof fixing box (7); a driving mechanism (14) is arranged in the dustproof fixing box (7); the driving mechanism (14) comprises a driving gear (144) key-connected to the outer circumferential wall of the clamping sleeve (15); the inner wall of the dustproof fixing box (7) near the side of the driving gear (144) A shaft (143) parallel to the axis of the abutting and clamping sleeve (15) is provided on the surface, and a small gear (145) meshing with the driving gear (144) is sleeved on the shaft (143); a driven worm wheel (142) is fixed to the end of the shaft (143) away from the valve body housing (1); a bearing seat is embedded in the top of the dustproof fixing box (7), and a transmission rod (5) extending vertically upward is fixed in the bearing seat, and a worm sleeve (141) meshing with the driven worm wheel (142) is fixed to the bottom end of the transmission rod (5); a rotating disk (6) is fixed to the top of the transmission rod (5).

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