A throttling protection shut-off valve system for pipelines

Abstract

The present invention relates to the technical field of cut-off valves, in particular to a throttling protection cut-off valve system for a pipeline, comprising a water inlet pipe, a water outlet pipe and a hollow valve core; further comprising a tapered piston body, an outer tapered sealing surface, a tapered seal and a spring sheet, the middle portion of the hollow valve core is slidingly and sealingly connected to the right end of the water inlet pipe, the left end of the hollow valve core is provided with a tapered piston body, the right side wall of the tapered piston body is provided with an outer tapered sealing surface, the right part of the water inlet pipe is installed with a tapered seal, an inner tapered sealing surface matching the tapered piston body is provided on the inner wall of the tapered seal, the right ends of multiple spring sheets are connected to the right inner wall of the water inlet pipe, the left ends of multiple spring sheets are connected to the tapered piston body, the multiple spring sheets elastically support the tapered piston body and the hollow valve core, so that a liquid gap is provided between the outer tapered sealing surface of the tapered piston body and the tapered seal; the system can automatically make adjustments as the water pressure or water flow changes on the basis of automatically cutting off the water flow, so that the water flow remains stable and has good functionality.

Description

Technical Field

[0001] The present invention relates to the technical field of cut-off valves, in particular to a throttling protection cut-off valve system for a pipeline. Background Art

[0002] In order to enable emergency shutoff of the pipeline in the event of bursting and pressure loss, thereby protecting the pipeline safety, a throttling protection shut-off valve system needs to be installed. Various shut-off valves are disclosed in the prior art, such as the waterway shut-off valve proposed in the Chinese invention patent application with publication number CN116146722A. The waterway shut-off valve comprises: a valve body assembly, a valve core mounting cavity and a connecting rod moving space located on the outer peripheral side of the valve core mounting cavity are formed in the valve body assembly, and the valve core of the valve body assembly is movably arranged in the valve core mounting cavity; a pushing assembly, comprising a driving member and a pushing connecting member, the pushing connecting member is sleeved on the valve core and has a connecting rod portion extending outwardly into the connecting rod moving space, and the driving member and the connecting rod portion are drivingly connected; the waterway shut-off valve has the advantage of conveniently knowing its working status.

[0003] However, the valve core of the above-mentioned water shut-off valve is fixed by the rigid support of the push assembly during operation, so it cannot automatically make corresponding adjustments when the water pressure or water flow changes, and therefore cannot keep the water flow through the shut-off valve stable. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a throttling protection shut-off valve system for pipelines with good functionality, which can automatically cut off the water flow and automatically adjust with changes in water pressure or water flow to keep the water flow stable.

[0005] The throttling protection shut-off valve system of the present invention comprises an inlet pipe, an outlet pipe and a hollow valve core, the inlet pipe and the outlet pipe are concentrically connected, a fluid channel is arranged inside the inlet pipe and the outlet pipe, and the hollow valve core is movably installed in the fluid channel of the inlet pipe and the outlet pipe; the system also comprises a conical piston body, an outer conical sealing surface, a conical seal and a spring sheet, the inlet pipe is the water inlet end, the outlet pipe is the water outlet end, the outlet pipe is installed at the right end of the inlet pipe, the right end side wall of the hollow valve core is provided with a water outlet hole connected with the interior, the middle part of the hollow valve core is slidingly sealed with the right end of the inlet pipe, the left end of the hollow valve core is provided with a conical piston body, the right side wall of the conical piston body is provided with an outer conical sealing surface, and the conical sealing surface is provided with an inlet hole connected with the interior of the hollow valve core. Water hole, a conical seal is installed on the right part of the water inlet pipe, an inner conical sealing surface matching the outer conical sealing surface is provided on the inner wall of the conical seal, the inner conical sealing surface of the conical seal is used to close the water inlet hole of the outer conical sealing surface, the right ends of multiple spring sheets are connected to the right part of the water inlet pipe, the left ends of multiple spring sheets are connected to the conical piston body, the multiple spring sheets elastically support the conical piston body and the hollow valve core, so that a liquid gap is provided between the outer conical sealing surface of the conical piston body and the conical seal; when working, the water inlet pipe is connected to the large water end of the pipeline, and the water outlet pipe is connected to the water outlet end of the pipeline, and the stable water of the pipeline enters the water inlet pipe and then passes through the liquid gap between the conical piston body and the conical seal and input into the hollow valve core through the water inlet hole of the conical piston body. When the pressure and flow of the incoming water decrease, the water flow pressure and impact force on the left end of the conical piston body decrease, and the stored force of the multiple spring sheets is released, causing the conical piston body and the hollow valve core to move to the left under the elastic support of the multiple spring sheets, so that the conical piston body and the hollow valve core move to the right. The liquid gap between the conical piston body and the conical seal increases, which increases the water flow input into the hollow valve core through the water inlet hole, thereby maintaining the water flow input into the outlet pipe stable when the incoming water pressure and flow rate decrease; when the pipeline behind the outlet pipe bursts and loses pressure or the incoming water pressure in front of the water inlet pipe increases sharply, causing the water pressure difference between the water inlet pipe and the outlet pipe to exceed the threshold value, the water flow pressure and impact force exerted on the conical piston body increase sharply, pressing the outer conical sealing surface of the conical piston body to the inner conical sealing surface of the conical seal, thereby cutting off the water flow and achieving the purpose of protecting the pipeline; when the pressure difference between the water inlet pipe and the outlet pipe returns to normal, the elastic force of the multiple spring leaves pushes the conical piston body and the hollow valve core to reset, so that the water inlet pipe and the outlet pipe are restored to communication;Compared with the existing technology, the hollow valve core and conical piston body can automatically make corresponding adjustments when the water pressure or water flow changes, so that the water flow through the cut-off valve remains stable, and can automatically cut off the water flow when the pressure difference is large, with good functionality.

[0006] Preferably, it also includes a left conical surface, a left conical surface is set at the left end of the outer wall of the conical piston body, and a conical surface matching the left conical surface is set on the middle inner wall of the water inlet pipe; when there is no water in the water inlet pipe, the elastic force of multiple spring sheets pushes the conical piston body and the hollow valve core to the left, so that the left conical surface is in sealing contact with the conical surface of the water inlet pipe. At this time, the water pressure in the water outlet pipe pushes the hollow valve core to the left, so that the left conical surface is pressed tightly against the conical surface of the water inlet pipe, thereby reducing the backflow of water from the drain end behind the water outlet pipe to the water inlet pipe and the water inlet end, thereby achieving a cut-off effect.

[0007] Preferably, it also includes a spring seat and a spring, the spring seat is installed at the inner left end of the water inlet pipe, the left end of the spring is connected to the spring seat, and the right end of the spring is connected to the middle part of the conical piston body; the spring elastically connects the conical piston body and the water inlet pipe, and the elastic force of the spring pushes the conical piston body and the hollow valve core to the right, and cooperates with the elastic force of multiple spring sheets to support the conical piston body and the hollow valve core, thereby adjusting the stability of the conical piston body and the hollow valve core when the water pressure and flow rate change.

[0008] Preferably, it also includes a push ring, a screw, a driven gear and a gear ring, the push ring is located inside the water inlet pipe, the gear ring is arranged on the outside of the conical piston body, the right ends of the multiple spring sheets are installed on the push ring, the left ends of the multiple screws are threadedly connected to the push ring, the right ends of the multiple screws are rotatably connected to the outer wall of the water inlet pipe, wear-resistant sealing rings are arranged between the multiple screws and the outer wall of the water inlet pipe, the right ends of the multiple screws are concentrically installed with driven gears, the gear ring is concentrically rotatably installed on the outer wall of the water inlet pipe, and the gear ring is meshed with the multiple driven gears; the gear ring is rotated, and the gear ring meshes with the multiple driven gears The wheel drives multiple screws to rotate synchronously, and the threaded connection between the multiple screws and the push ring drives the push ring to move left and right. When the push ring moves to the left, the push ring drives multiple spring sheets to push the conical piston body to the left, so that the initial liquid gap between the conical piston body and the conical seal increases; when the push ring moves to the right, the push ring drives multiple spring sheets to push the conical piston body to the right, so that the initial liquid gap between the conical piston body and the conical seal decreases; the adjustment of the initial liquid gap is realized, and then the adjustable stroke size of the conical piston body and the hollow valve core is adjusted.

[0009] Preferably, it also includes multiple push blocks, multiple springs II, multiple levers and multiple guide blocks, multiple slots are provided on the circumference of the outer wall of the tapered piston body, the multiple push blocks are slidably inserted in the multiple slots of the tapered piston body, the two ends of the multiple springs II are respectively connected to the tapered piston body and the multiple push blocks, the left ends of the multiple spring sheets are respectively inserted in the multiple slots of the tapered piston body and rest on the multiple push blocks, the outer walls of the multiple push blocks are all equipped with levers, the multiple guide blocks are installed on the push ring, the multiple guide blocks are respectively aligned with the multiple levers, and the multiple guide blocks are used to guide the multiple levers and the multiple push blocks to the outside of the tapered piston body; when the pressure difference between the water inlet pipe and the water outlet pipe is large When the camming member is in the closed position, the spring member moves forward and the spring member moves out of the closed position, and the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction, so that the cam member moves in a forward direction

[0010] Preferably, it also includes multiple guide grooves, multiple guide grooves are arranged on the outer wall of the conical piston body, and the multiple guide grooves are respectively located on the left outer wall of the multiple slots of the conical piston body, and the multiple guide grooves are used to guide the left ends of the multiple spring sheets; by setting multiple guide grooves to guide the left ends of the multiple spring sheets that are separated from the multiple slots of the conical piston body, the left ends of the multiple spring sheets are easier to separate from or reset from the slots.

[0011] Preferably, it also includes a sealing sleeve and an inner sealing ring. The sealing sleeve is concentrically installed inside the right end of the water inlet pipe, and the inner wall of the sealing sleeve is in sliding contact with the right outer wall of the hollow valve core. An annular sealing groove is provided in the middle of the sealing sleeve, and the inner sealing ring is installed in the annular sealing groove of the sealing sleeve. The inner sealing ring is in sliding and sealing contact with the right outer wall of the hollow valve core; by arranging the sealing sleeve and the inner sealing ring, the sealing between the hollow valve core and the water inlet pipe is improved, and the reliability of the cut-off is improved.

[0012] Preferably, it also includes a water pressure pipe, the left end of the water pressure pipe is connected to the inside of the left end of the water inlet pipe, and the right end of the water pressure pipe is connected to the annular sealing groove of the sealing sleeve; the high-pressure water at the left end of the water inlet pipe is input into the annular sealing groove of the sealing sleeve through the water pressure pipe to form a water ring, and the pressure of the water ring presses the inner sealing ring against the outer wall of the hollow valve core, thereby improving the sealing performance of the hollow valve core and the water inlet pipe. At the same time, the water ring lubricates the inner sealing ring to reduce wear.

[0013] Preferably, it also includes pressure sensor 1 and pressure sensor 2, pressure sensor 1 is installed at the left end of the water inlet pipe, and the probe of pressure sensor 1 extends into the left end of the water inlet pipe, and pressure sensor 2 is installed on the water outlet pipe, and the probe of pressure sensor 2 extends into the inside of the water outlet pipe; pressure sensor 1 is used to detect the water pressure inside the left end of the water inlet pipe, and pressure sensor 2 is used to detect the water pressure inside the water outlet pipe, thereby detecting the pressure difference between the water inlet pipe and the water outlet pipe, and detecting the working status.

[0014] Preferably, the water outlet pipe includes a left flange sleeve, an internal threaded sleeve, a right flange sleeve, a movable threaded ring, a spline sleeve and a spline rod, the left flange sleeve is concentrically connected to the right end of the water inlet pipe, the left end of the internal threaded sleeve is rotatably connected to the right end of the left flange sleeve, a wear-resistant seal is provided between the internal threaded sleeve and the left flange sleeve, the inner wall of the internal threaded sleeve is provided with a thread, the right end of the internal threaded sleeve is rotatably connected to the left end of the right flange sleeve, a wear-resistant seal is provided between the internal threaded sleeve and the right flange sleeve, the outer wall of the movable threaded ring is provided with an external thread, the movable threaded ring is threadedly connected to the internal threaded sleeve, the spline sleeve is installed inside the movable threaded ring through a bracket, the spline sleeve and the spline rod are slidably connected through a spline pair, and the spline rod is concentrically installed in the middle of the right end of the hollow valve core; the left flange sleeve, the internal threaded sleeve and the right flange sleeve constitute an output pipeline, and the right flange sleeve is connected to the drain pipeline; rotate the internal threaded sleeve The threaded action of the internal threaded sleeve and the movable threaded ring causes the movable threaded ring to move left and right, and the movable threaded ring drives the spline sleeve to move left and right; when the water flow in the pipeline is restored, the internal threaded sleeve is rotated to cause the spline sleeve to move left along the spline rod until it contacts the right end of the hollow valve core. The internal threaded sleeve is further rotated to cause the spline sleeve to push the hollow valve core and the tapered piston body to the left and reset, so that the liquid gap between the tapered piston body and the tapered seal is restored. When the multiple levers are disengaged from the multiple guide blocks, the elastic force of the multiple springs causes the multiple push blocks to retract and reset to the multiple slots of the tapered piston body. The internal threaded sleeve is further rotated to cause the left ends of the multiple spring sheets to be reinserted into the multiple slots of the tapered piston body. At this time, the hollow valve core and the tapered piston body are reset, and the internal threaded sleeve is reversed to cause the movable threaded ring and the spline sleeve to move right, so that the spline sleeve is disengaged from the hollow valve core. At this time, the entire system is reset.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the hollow valve core and the conical piston body can automatically make corresponding adjustments when the water pressure or water flow changes, so that the water flow through the cut-off valve remains stable, and can automatically cut off the water flow when the pressure difference is large, with good functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic side cross-sectional view of the present invention in a connected state;

[0017] Figure 2 is an axonometric schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of an axonometric partial cross-sectional structure of the present invention in a cut state;

[0019] Figure 4 It is a side cross-sectional structural schematic diagram of the present invention in a cut state;

[0020] Figure 5 This is a schematic structural diagram of the present invention in a cut-off reflux state;

[0021] Figure 6 This is a schematic side cross-sectional view of the present invention in a cut-off reflux state;

[0022] Figure 7 It is a structural diagram of the conical seal, sealing sleeve, inner sealing ring and hydraulic pipe;

[0023] Figure 8 It is a structural diagram of the hollow valve core, tapered piston body, spring sheet, spring, push ring, screw and gear ring;

[0024] Figure 9 yes Figure 8 Schematic diagram of the local enlarged structure at A in the middle;

[0025] Figure 10 It is a structural diagram of the hollow valve core, tapered piston body and water outlet pipe in the exploded state.

[0026] Markings in the accompanying drawings: 1. Water inlet pipe; 2. Water outlet pipe; 3. Hollow valve core; 4. Conical piston body; 5. Outer conical sealing surface; 6. Conical seal; 7. Spring sheet; 8. Left conical surface; 9. Spring seat; 10. Spring; 11. Push ring; 12. Screw; 13. Driven gear; 14. Ring gear; 15. Push block; 16. Spring 2; 17. Push rod; 18. Guide block; 19. Sealing sleeve; 20. Inner sealing ring; 21. Water pressure pipe; 22. Pressure sensor 1; 23. Pressure sensor 2; 24. Left flange sleeve; 25. Internally threaded sleeve; 26. Right flange sleeve; 27. Movable threaded ring; 28. Spline sleeve; 29. Spline rod; 30. Guide groove. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] Example 1, as Figures 1 to 7As shown, a throttling protection shut-off valve system for a pipeline includes a water inlet pipe 1, a water outlet pipe 2 and a hollow valve core 3. The water inlet pipe 1 and the water outlet pipe 2 are concentrically connected, and a fluid channel is provided inside the water inlet pipe 1 and the water outlet pipe 2. The hollow valve core 3 is movably installed in the fluid channel of the water inlet pipe 1 and the water outlet pipe 2; it also includes a conical piston body 4, an outer conical sealing surface 5, a conical sealing member 6 and a spring sheet 7. The water inlet pipe 1 is the water inlet end, the water outlet pipe 2 is the water outlet end, the water outlet pipe 2 is installed at the right end of the water inlet pipe 1, and the hollow valve core The right end side wall of the hollow valve core 3 is provided with a water outlet hole connected to the interior, the middle part of the hollow valve core 3 is connected to the right end of the water inlet pipe 1 in a sliding and sealing manner, the left end of the hollow valve core 3 is provided with a conical piston body 4, the right side wall of the conical piston body 4 is provided with an outer conical sealing surface 5, and a water inlet hole connected to the interior of the hollow valve core 3 is provided on the conical sealing surface. A conical seal 6 is installed on the right part of the water inlet pipe 1, and an inner conical sealing surface matching the outer conical sealing surface 5 is provided on the inner wall of the conical seal 6. The inner conical sealing surface of the conical seal 6 is used In order to close the water inlet hole of the outer conical sealing surface 5, the right end of the multiple spring sheets 7 is connected to the right part of the water inlet pipe 1, and the left end of the multiple spring sheets 7 is connected to the conical piston body 4. The multiple spring sheets 7 elastically support the conical piston body 4 and the hollow valve core 3, so that a liquid gap is set between the outer conical sealing surface 5 of the conical piston body 4 and the conical seal 6; it also includes a left conical surface 8, the left end of the outer wall of the conical piston body 4 is provided with a left conical surface 8, and the middle inner wall of the water inlet pipe 1 is provided with a conical surface matching the left conical surface 8; it also includes an elastic Spring seat 9 and spring 10, spring seat 9 is installed at the left end of the interior of water inlet pipe 1, the left end of spring 10 is connected to spring seat 9, and the right end of spring 10 is connected to the middle part of tapered piston body 4; it also includes pressure sensor 1 22 and pressure sensor 2 23, pressure sensor 1 22 is installed at the left end of water inlet pipe 1, and the probe of pressure sensor 1 22 extends into the left end of water inlet pipe 1, pressure sensor 2 23 is installed on water outlet pipe 2, and the probe of pressure sensor 2 23 extends into the interior of water outlet pipe 2.

[0029] During operation, the water inlet pipe 1 is connected to the large water inlet end of the pipeline, and the water outlet pipe 2 is connected to the water outlet end of the pipeline. The pressure sensor 1 22 is used to detect the water pressure inside the left end of the water inlet pipe 1, and the pressure sensor 2 23 is used to detect the water pressure inside the water outlet pipe 2, thereby detecting the pressure difference between the water inlet pipe 1 and the water outlet pipe 2, and detecting the working state; the stable water in the pipeline enters the water inlet pipe 1, passes through the liquid gap between the conical piston body 4 and the conical seal 6, and is input into the hollow valve core 3 through the water inlet hole of the conical piston body 4, and then enters the water outlet pipe 2 through the water outlet hole of the hollow valve core 3. When the pressure and flow of the incoming water increase, the water pressure and impact force on the left end of the conical piston body 4 increase, causing the conical piston body 4 and the hollow valve core 3 to move to the right, and compressing and deforming the multiple spring sheets 7 to store force, so that the liquid gap between the conical piston body 4 and the conical seal 6 is reduced, so that the water flow input to the hollow valve core 3 through the water inlet hole is reduced, thereby maintaining the water flow input to the water outlet pipe 2 stable when the pressure and flow of the incoming water increase; when the pressure and flow of the incoming water decrease, the water pressure and impact force on the left end of the conical piston body 4 decrease, and multiple spring sheets 7 are compressed and deformed, so that the liquid gap between the conical piston body 4 and the conical seal 6 is reduced, and the water flow input to the hollow valve core 3 through the water inlet hole is reduced, thereby maintaining the water flow input to the water outlet pipe 2 stable when the pressure and flow of the incoming water decrease. The spring sheets 7 store and release the force, causing the conical piston body 4 and the hollow valve core 3 to move to the left under the elastic support of the multiple spring sheets 7, so that the liquid gap between the conical piston body 4 and the conical seal 6 increases, so that the water flow input into the hollow valve core 3 through the water inlet hole increases, thereby maintaining the water flow input into the outlet pipe 2 stable when the incoming water pressure and flow decrease; when the pipeline behind the outlet pipe 2 bursts and loses pressure or the incoming water pressure in front of the water inlet pipe 1 increases sharply, causing the water pressure difference between the water inlet pipe 1 and the outlet pipe 2 to exceed the threshold, the water flow pressure and impact force on the conical piston body 4 increase sharply, The outer conical sealing surface 5 of the conical piston body 4 is pressed against the inner conical sealing surface of the conical seal 6, thereby cutting off the water flow and achieving the purpose of protecting the pipeline. When the pressure difference between the water inlet pipe 1 and the water outlet pipe 2 returns to normal, the elastic force of the multiple spring leaves 7 pushes the conical piston body 4 and the hollow valve core 3 to reset, so that the water inlet pipe 1 and the water outlet pipe 2 are restored to communication. Compared with the prior art, the hollow valve core 3 and the conical piston body 4 can automatically make corresponding adjustments when the water pressure or water flow changes, so that the water flow through the cut-off valve remains stable and can automatically cut off the water flow when the pressure difference is large, with good functionality.

[0030] When there is no water in the water inlet pipe 1, the elastic force of multiple spring sheets 7 pushes the conical piston body 4 and the hollow valve core 3 to the left, so that the left conical surface 8 is in sealing contact with the conical surface of the water inlet pipe 1. At this time, the water pressure in the outlet pipe 2 pushes the hollow valve core 3 to the left, so that the left conical surface 8 is pressed tightly against the conical surface of the water inlet pipe 1, thereby reducing the backflow of water from the outlet end behind the outlet pipe 2 to the water inlet pipe 1 and the water inlet end, thereby achieving a cut-off effect; the spring 10 elastically connects the conical piston body 4 and the water inlet pipe 1, and the elastic force of the spring 10 pushes the conical piston body 4 and the hollow valve core 3 to the right, and cooperates with the elastic force of multiple spring sheets 7 to support the conical piston body 4 and the hollow valve core 3, thereby adjusting the stability of the conical piston body 4 and the hollow valve core 3 when the water pressure and flow rate change.

[0031] It also includes a sealing sleeve 19 and an inner sealing ring 20. The sealing sleeve 19 is concentrically installed inside the right end of the water inlet pipe 1. The inner wall of the sealing sleeve 19 is in sliding contact with the right outer wall of the hollow valve core 3. An annular sealing groove is provided in the middle of the sealing sleeve 19. The inner sealing ring 20 is installed in the annular sealing groove of the sealing sleeve 19. The inner sealing ring 20 is in sliding and sealing contact with the right outer wall of the hollow valve core 3; it also includes a water pressure pipe 21. The left end of the water pressure pipe 21 is connected to the inside of the left end of the water inlet pipe 1, and the right end of the water pressure pipe 21 is connected to the annular sealing groove of the sealing sleeve 19.

[0032] By providing a sealing sleeve 19 and an inner sealing ring 20, the sealing between the hollow valve core 3 and the water inlet pipe 1 is improved. The high-pressure water at the left end of the water inlet pipe 1 is input into the annular sealing groove of the sealing sleeve 19 through the hydraulic pipe 21 to form a water ring. The pressure of the water ring presses the inner sealing ring 20 against the outer wall of the hollow valve core 3, thereby improving the sealing between the hollow valve core 3 and the water inlet pipe 1 and improving the reliability of the cut-off. At the same time, the water ring lubricates the inner sealing ring 20 to reduce wear.

[0033] Example 2, as Figures 1 to 6 、 Figure 8 and Figure 9As shown, on the basis of Example 1, it also includes a push ring 11, a screw 12, a driven gear 13 and a ring gear 14, the push ring 11 is located inside the water inlet pipe 1, the ring gear 14 is arranged on the outside of the conical piston body 4, the right ends of the multiple spring sheets 7 are installed on the push ring 11, the left ends of the multiple screws 12 are threadedly connected to the push ring 11, the right ends of the multiple screws 12 are rotatably connected to the outer wall of the water inlet pipe 1, and wear-resistant sealing rings are arranged between the multiple screws 12 and the outer wall of the water inlet pipe 1. The right ends of the multiple screws 12 are concentrically mounted with the driven gear 13, and the ring gear 14 is concentrically rotatably mounted on the outer wall of the water inlet pipe 1, and the ring gear 14 is meshed with the multiple driven gears 13; it also includes multiple push blocks 15, multiple springs 16, multiple levers 17 and multiple guide blocks 18, and multiple slots are arranged on the circumference of the outer wall of the conical piston body 4. Multiple push blocks 15 are respectively slidably inserted into multiple slots of the tapered piston body 4, and the two ends of multiple springs 16 are respectively connected to the tapered piston body 4 and the multiple push blocks 15. The left ends of the multiple spring sheets 7 are respectively inserted into the multiple slots of the tapered piston body 4 and rest on the multiple push blocks 15. The outer walls of the multiple push blocks 15 are all equipped with shift rods 17, and multiple guide blocks 18 are installed on the push ring 11. The multiple guide blocks 18 are respectively aligned with the multiple shift rods 17. The multiple guide blocks 18 are used to guide the multiple shift rods 17 and the multiple push blocks 15 to the outside of the tapered piston body 4; it also includes multiple guide grooves 30. Multiple guide grooves 30 are set on the outer wall of the tapered piston body 4. The multiple guide grooves 30 are respectively located on the left outer walls of the multiple slots of the tapered piston body 4. The multiple guide grooves 30 are used to guide the left ends of the multiple spring sheets 7.

[0034] The ring gear 14 is rotated, and the ring gear 14 engages with multiple driven gears 13 to drive multiple screws 12 to rotate synchronously. The threaded connection between the multiple screws 12 and the push ring 11 drives the push ring 11 to move left and right. When the push ring 11 moves to the left, the push ring 11 drives the multiple spring sheets 7 to push the conical piston body 4 to the left, so that the initial liquid gap between the conical piston body 4 and the conical seal 6 increases; when the push ring 11 moves to the right, the push ring 11 drives the multiple spring sheets 7 to push the conical piston body 4 to the right, so that the initial liquid gap between the conical piston body 4 and the conical seal 6 decreases; the initial liquid gap is adjusted, and then the adjustable stroke size of the conical piston body 4 and the hollow valve core 3 is adjusted.

[0035] When the pressure difference between the water inlet pipe 1 and the water outlet pipe 2 is greater than the threshold value, the conical piston body 4 drives the multiple push blocks 15 and the multiple shift rods 17 to move toward the push ring 11. When the multiple shift rods 17 contact the multiple guide blocks 18, the conical piston body 4 continues to move right, so that the multiple guide blocks 18 guide the multiple shift rods 17 and the multiple push blocks 15 toward the outside of the conical piston body 4, thereby causing the multiple push blocks 15 to push the left ends of the multiple spring plates 7 out of the slots of the conical piston body 4, so that the multiple spring plates 7 are disengaged from the conical piston body 4. The multiple guide grooves 30 guide the left ends of the multiple spring plates 7 that are disengaged from the multiple slots of the conical piston body 4, making it easier for the left ends of the multiple spring plates 7 to disengage from the slots. At this time, the conical piston body 4 loses the elastic support of the multiple spring plates 7, and the elastic force of the spring 10 pushes the conical piston body 4 and the hollow valve core 3 to the right, so that the outer conical sealing surface 5 of the conical piston body 4 is tightly pressed against the inner conical sealing surface of the conical seal 6, thereby improving the reliability of cutting.

[0036] Example 3, as Figures 1 to 6 、 Figure 10 As shown, on the basis of Example 1, the water outlet pipe 2 includes a left flange sleeve 24, an internally threaded sleeve 25, a right flange sleeve 26, a movable threaded ring 27, a spline sleeve 28 and a spline rod 29. The left flange sleeve 24 is concentrically connected to the right end of the water inlet pipe 1, and the left end of the internally threaded sleeve 25 is rotatably connected to the right end of the left flange sleeve 24. A wear-resistant seal is provided between the internally threaded sleeve 25 and the left flange sleeve 24. The inner wall of the internally threaded sleeve 25 is provided with a thread. The internal thread ring 27 is provided with a spline sleeve 28 and a spline rod 29. The right end of the grooved sleeve 25 is rotatably connected to the left end of the right flange sleeve 26. A wear-resistant seal is provided between the internally threaded sleeve 25 and the right flange sleeve 26. An external thread is provided on the outer wall of the movable threaded ring 27. The movable threaded ring 27 is threadedly connected to the internally threaded sleeve 25. The spline sleeve 28 is installed inside the movable threaded ring 27 through a bracket. The spline sleeve 28 is slidably connected to the spline rod 29 through a spline pair. The spline rod 29 is concentrically installed in the middle of the right end of the hollow valve core 3.

[0037] The left flange sleeve 24, the internally threaded sleeve 25 and the right flange sleeve 26 constitute an output pipeline, and the right flange sleeve 26 is connected to the water drain pipeline; the internally threaded sleeve 25 is rotated, and the threaded action of the internally threaded sleeve 25 and the movable threaded ring 27 causes the movable threaded ring 27 to move left and right, and the movable threaded ring 27 drives the spline sleeve 28 to move left and right; when the water flow in the pipeline is restored, the internally threaded sleeve 25 is rotated to cause the spline sleeve 28 to move leftward along the spline rod 29 until it contacts the right end of the hollow valve core 3, and the internally threaded sleeve 25 is further rotated to cause the spline sleeve 28 to push the hollow valve core 3 and the tapered piston body 4 to the left and reset. The liquid gap between the tapered piston body 4 and the tapered seal 6 is restored. When the multiple levers 17 are disengaged from the multiple guide blocks 18, the elastic force of the multiple springs 16 causes the multiple push blocks 15 to shrink and reset to the multiple slots of the tapered piston body 4. The internal threaded sleeve 25 is continued to be rotated so that the left ends of the multiple spring sheets 7 are reinserted into the multiple slots of the tapered piston body 4. At this time, the hollow valve core 3 and the tapered piston body 4 are reset. The internal threaded sleeve 25 is reversed so that the movable threaded ring 27 and the spline sleeve 28 move to the right, so that the spline sleeve 28 is disengaged from the hollow valve core 3. At this time, the entire system is reset.

[0038] like Figures 1 to 10As shown, a throttling protection shut-off valve system for a pipeline of the present invention, when working, first the water inlet pipe 1 is connected to the large water inlet end of the pipeline, the right flange sleeve 26 is connected to the water outlet end of the pipeline, the gear ring 14 is rotated, the gear ring 14 engages with multiple driven gears 13 to drive multiple screws 12 to rotate synchronously, the multiple screws 12 are threadedly connected to the push ring 11 to drive the push ring 11 to move left and right, and the push ring 11 drives multiple spring sheets 7 to push the conical piston body 4 to the left and right to adjust the size of the initial liquid gap; then the stable water in the pipeline enters the water inlet pipe 1 and passes through the liquid gap between the conical piston body 4 and the conical seal 6 through the water inlet hole of the conical piston body 4 into the hollow valve core 3, and then enters the left flange sleeve 24, the internal threaded sleeve 25 and the right flange sleeve 26 through the water outlet hole of the hollow valve core 3 and is transported backward; when the pressure and flow of the water increase, The water flow pressure and impact force on the left end of the conical piston body 4 increase, causing the conical piston body 4 and the hollow valve core 3 to move to the right, and compressing the multiple spring sheets 7 to store force and deform, so that the liquid gap between the conical piston body 4 and the conical seal 6 is reduced, so that the water flow input into the hollow valve core 3 through the water inlet hole is reduced, thereby maintaining the water flow input into the water outlet pipe 2 stable when the incoming water pressure and flow rate increase; when the incoming water pressure and flow rate decrease, the water flow pressure and impact force on the left end of the conical piston body 4 decrease, and the multiple spring sheets 7 store force and release, causing the conical piston body 4 and the hollow valve core 3 to move to the left under the elastic support of the multiple spring sheets 7, so that the liquid gap between the conical piston body 4 and the conical seal 6 is increased, so that the water flow input into the hollow valve core 3 through the water inlet hole is increased, thereby maintaining the water flow input into the water outlet pipe 2 stable when the incoming water pressure and flow rate decrease;Then, when the pipe behind the outlet pipe 2 bursts and loses pressure or the water pressure in front of the inlet pipe 1 increases sharply, causing the water pressure difference between the inlet pipe 1 and the outlet pipe 2 to exceed the threshold, the water flow pressure and impact force on the conical piston body 4 increase sharply, and the conical piston body 4 drives the multiple push blocks 15 and the multiple levers 17 to move toward the push ring 11. When the multiple levers 17 come into contact with the multiple guide blocks 18, the conical piston body 4 continues to move to the right, causing the multiple guide blocks 18 to push the multiple levers 17 and the multiple push blocks 15 to move toward the push ring 11. 5 is toggled toward the outside of the conical piston body 4, so that the multiple push blocks 15 push the left ends of the multiple spring sheets 7 out of the slots of the conical piston body 4, so that the multiple spring sheets 7 are separated from the conical piston body 4. At this time, the conical piston body 4 loses the elastic support of the multiple spring sheets 7, and the elastic force of the spring 10 pushes the conical piston body 4 and the hollow valve core 3 to the right, so that the outer conical sealing surface 5 of the conical piston body 4 is tightly pressed against the inner conical sealing surface of the conical seal 6, thereby cutting off the water flow. The purpose of protecting the pipeline is achieved. Finally, when the pressure difference between the water inlet pipe 1 and the water outlet pipe 2 returns to normal, the internal threaded sleeve 25 is rotated to make the spline sleeve 28 move leftward along the spline rod 29 until it contacts the right end of the hollow valve core 3. The internal threaded sleeve 25 is further rotated to make the spline sleeve 28 push the hollow valve core 3 and the tapered piston body 4 to the left and reset, so that the liquid gap between the tapered piston body 4 and the tapered seal 6 is restored. When the multiple levers 17 are disengaged from the multiple guide blocks 18, the elastic force of the multiple springs 2 16 causes the multiple push blocks 15 to retract and reset to the multiple slots of the tapered piston body 4. The internal threaded sleeve 25 is further rotated to make the left ends of the multiple spring sheets 7 re-inserted into the multiple slots of the tapered piston body 4. At this time, the hollow valve core 3 and the tapered piston body 4 are reset. The internal threaded sleeve 25 is reversed to make the movable threaded ring 27 and the spline sleeve 28 move rightward, so that the spline sleeve 28 is disengaged from the hollow valve core 3. At this time, the entire system is reset and restored to communication. ;

[0039] The main functions achieved by the present invention are:

[0040] 1. It can automatically cut off the water flow to protect the pipeline;

[0041] 2. It can automatically make corresponding adjustments when the water pressure or water flow changes, so that the water flow through the cut-off valve remains stable;

[0042] 3. It can reduce the backflow of water from the outlet end behind the outlet pipe 2 to the inlet pipe 1 and the water inlet end, achieving a cut-off effect;

[0043] 4. The size of the initial liquid gap can be adjusted, thereby adjusting the adjustable stroke size of the conical piston body 4 and the hollow valve core 3;

[0044] 5. It is possible to separate the multiple spring pieces 7 from the tapered piston body 4, thereby improving the reliability of cutting.

[0045] The throttling protection shut-off valve system for a pipeline of the present invention has an installation method, a connection method or a setting method that are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the water inlet pipe 1, the water outlet pipe 2, the hollow valve core 3, the conical piston body 4, the conical seal 6, the spring sheet 7, the spring seat 9, the spring 10, the push ring 11, the screw 12, the driven gear 13, the gear ring 14, the spring 2 16, the shift rod 17, the guide block 18, the sealing sleeve 19, the inner sealing ring 20, the water pressure pipe 21, the pressure sensor 1 22, the pressure sensor 2 23, the internal threaded sleeve 25, the movable threaded ring 27, the spline sleeve 28, and the spline rod 29 of the throttling protection shut-off valve system for a pipeline of the present invention are purchased on the market, and technicians in this industry only need to install and operate them according to the accompanying instruction manual, without the need for technicians in this field to pay creative labor.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A throttling protection shut-off valve system for a pipeline, comprising a water inlet pipe (1), a water outlet pipe (2) and a hollow valve core (3), wherein the water inlet pipe (1) and the water outlet pipe (2) are concentrically connected, a fluid passage is provided inside the water inlet pipe (1) and the water outlet pipe (2), and the hollow valve core (3) is movably installed in the fluid passage of the water inlet pipe (1) and the water outlet pipe (2); characterized in that: The utility model also includes a conical piston body (4), an outer conical sealing surface (5), a conical sealing member (6), a spring sheet (7) and a push ring (11), wherein the water inlet pipe (1) is a water inlet end, the water outlet pipe (2) is a water outlet end, the water outlet pipe (2) is installed at the right end of the water inlet pipe (1), the right end side wall of the hollow valve core (3) is provided with a water outlet hole connected with the interior, the middle part of the hollow valve core (3) is connected with the right end of the water inlet pipe (1) in a sliding sealing manner, the left end of the hollow valve core (3) is provided with a conical piston body (4), the right side wall of the conical piston body (4) is provided with an outer conical sealing surface (5), and the conical sealing surface is provided with a water inlet hole connected with the interior of the hollow valve core (3). A conical seal (6) is installed on the right side of the water inlet pipe (1), an inner conical sealing surface matching the outer conical sealing surface (5) is provided on the inner wall of the conical seal (6), the inner conical sealing surface of the conical seal (6) is used to close the water inlet hole of the outer conical sealing surface (5), a push ring (11) is located inside the water inlet pipe (1) and close to the right end of the water inlet pipe (1), the right ends of a plurality of spring sheets (7) are installed on the push ring (11), and the plurality of spring sheets (7) elastically support the conical piston body (4) and the hollow valve core (3), so that a liquid gap is provided between the outer conical sealing surface (5) of the conical piston body (4) and the conical seal (6); The utility model also includes a plurality of push blocks (15), a plurality of springs (16), a plurality of shift rods (17) and a plurality of guide blocks (18). A plurality of slots are provided on the circumference of the outer wall of the conical piston body (4). The plurality of push blocks (15) are respectively slidably inserted into the plurality of slots of the conical piston body (4). The two ends of the plurality of springs (16) are respectively connected to the conical piston body (4) and the plurality of push blocks (15). The left ends of the plurality of spring sheets (7) are respectively inserted into the plurality of slots of the conical piston body (4) and abut against the plurality of push blocks (15). The outer walls of the plurality of push blocks (15) are all provided with shift rods (17). The plurality of guide blocks (18) are installed on the push ring (11). The plurality of guide blocks (18) are respectively aligned with the plurality of shift rods (17). The plurality of guide blocks (18) are used to guide the plurality of shift rods (17) and the plurality of push blocks (15) toward the outside of the conical piston body (4). The outlet pipe (2) includes a left flange sleeve (24), an internal threaded sleeve (25), a right flange sleeve (26), a movable threaded ring (27), a spline sleeve (28) and a spline rod (29). The left flange sleeve (24) is concentrically connected to the right end of the water inlet pipe (1). The left end of the internal threaded sleeve (25) is rotatably connected to the right end of the left flange sleeve (24). A wear-resistant seal is provided between the internal threaded sleeve (25) and the left flange sleeve (24). The inner wall of the internal threaded sleeve (25) is provided with a thread. The internal threaded sleeve (2 The right end of the inner threaded sleeve (25) is rotatably connected to the left end of the right flange sleeve (26), a wear-resistant seal is provided between the inner threaded sleeve (25) and the right flange sleeve (26), an outer thread is provided on the outer wall of the movable threaded ring (27), the movable threaded ring (27) is threadedly connected to the inner threaded sleeve (25), the spline sleeve (28) is installed inside the movable threaded ring (27) through a bracket, the spline sleeve (28) and the spline rod (29) are slidably connected through a spline pair, and the spline rod (29) is concentrically installed in the middle of the right end of the hollow valve core (3).

2. A pipeline throttling protection shut-off valve system according to claim 1, characterized in that: It also includes a left conical surface (8), the left conical surface (8) is provided on the left end of the outer wall of the conical piston body (4), and a conical surface matching the left conical surface (8) is provided on the middle inner wall of the water inlet pipe (1).

3. A pipeline throttling protection shut-off valve system according to claim 1, characterized in that: It also includes a spring seat (9) and a spring (10), wherein the spring seat (9) is installed at the inner left end of the water inlet pipe (1), the left end of the spring (10) is connected to the spring seat (9), and the right end of the spring (10) is connected to the middle part of the tapered piston body (4).

4. A pipeline throttling protection shut-off valve system according to claim 1, characterized in that: The invention also includes a screw (12), a driven gear (13) and a ring gear (14), wherein the ring gear (14) is arranged on the outside of the conical piston body (4), the left ends of the plurality of screws (12) are threadedly connected to the push ring (11), the right ends of the plurality of screws (12) are rotatably connected to the outer wall of the water inlet pipe (1), a wear-resistant sealing ring is arranged between the plurality of screws (12) and the outer wall of the water inlet pipe (1), the right ends of the plurality of screws (12) are concentrically mounted with the driven gear (13), the ring gear (14) is concentrically rotatably mounted on the outer wall of the water inlet pipe (1), and the ring gear (14) is meshed with the plurality of driven gears (13).

5. A pipeline throttling protection shut-off valve system according to claim 1, characterized in that: The conical piston body (4) further comprises a plurality of guide grooves (30), wherein the plurality of guide grooves (30) are provided on the outer wall of the conical piston body (4), and the plurality of guide grooves (30) are respectively located on the left outer wall of the plurality of slots of the conical piston body (4), and the plurality of guide grooves (30) are used to guide the left ends of the plurality of spring sheets (7).

6. A pipeline throttling protection shut-off valve system according to claim 1, characterized in that: The invention also includes a sealing sleeve (19) and an inner sealing ring (20), wherein the sealing sleeve (19) is concentrically mounted inside the right end of the water inlet pipe (1), and the inner wall of the sealing sleeve (19) is in sliding contact with the right outer wall of the hollow valve core (3). An annular sealing groove is provided in the middle of the sealing sleeve (19), and the inner sealing ring (20) is mounted in the annular sealing groove of the sealing sleeve (19), and the inner sealing ring (20) is in sliding sealing contact with the right outer wall of the hollow valve core (3).

7. A pipeline throttling protection shut-off valve system according to claim 6, characterized in that: It also includes a water pressure pipe (21), the left end of the water pressure pipe (21) is connected to the left end of the water inlet pipe (1), and the right end of the water pressure pipe (21) is connected to the annular sealing groove of the sealing sleeve (19).

8. A pipeline throttling protection shut-off valve system according to claim 1, characterized in that: The apparatus further comprises a pressure sensor 1 (22) and a pressure sensor 2 (23), wherein the pressure sensor 1 (22) is mounted on the left end of the water inlet pipe (1), and the probe of the pressure sensor 1 (22) extends into the left end of the water inlet pipe (1), and the pressure sensor 2 (23) is mounted on the water outlet pipe (2), and the probe of the pressure sensor 2 (23) extends into the interior of the water outlet pipe (2).

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