Safety valve with anti-rotation structure

Abstract

The utility model relates to the field of safety valves, and discloses a safety valve with an anti-rotation structure, which comprises a flow-out pipe, an inlet pipe is fixedly connected in the flow-out pipe, a sealing assembly is arranged at the top of the inlet pipe, a connecting rod is slidably connected in the flow-out pipe, a sealing pipe is fixedly connected at the top of the flow-out pipe, and the sealing assembly is arranged at the top of the sealing pipe. A first fixing ring is fixedly connected to the outer wall of the connecting rod, a second fixing ring is fixedly connected to the interior of the sealing pipe, an extrusion assembly is arranged at one end of the second fixing ring, a sealing shell is fixedly connected to the top of the sealing pipe, and the sealing assembly comprises a sealing cover and a plurality of fixing columns. According to the utility model, after the water pressure is reduced, the sealing cover rebounds under the action of the spring, so that the sealing cover moves along the fixed column, the effect that the sealing cover returns to the original position after the water pressure is reduced is achieved, and the problem that the sealing cover rotates when the water pressure does not meet the condition is avoided; and therefore, the high efficiency of the safety valve with the anti-rotation structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of safety valve especially, relate to a safety valve with anti -rotation structure. BACKGROUND

[0002] Safety valve is a kind of safety protection class valve that automatically opens and releases pressure when the pressure in equipment or pipeline exceeds the specified value, and automatically closes when the pressure returns to normal, works based on the principle of force balance, is widely used in many industrial fields and building related systems, uses safety valve with anti -rotation structure, because it can guarantee the adjustment accuracy, prevent the parameter change caused by the accidental rotation of adjusting ring, ensure accurate work at set pressure, and stable opening and closing performance for multiple times, can improve sealing performance, maintain the correct cooperation of valve clack and valve seat, reduce medium leakage and sealing surface wear, prolong service life, also can enhance system stability, avoid abnormal action, adapt to complex working conditions such as large vibration and complex medium flow, guarantee system pressure stability and process continuity.

[0003] The existing safety valve with anti -rotation structure, when the medium pressure in equipment or pipeline exceeds the set opening pressure, the medium pressure overcomes the spring force to push the valve clack away from the valve seat to open, through mechanical limiting such as the cooperation of lower tooth groove of lower adjusting ring and lower stop screw and the cooperation of upper tooth groove of upper adjusting ring and upper stop screw, and the anti -rotation of existing friction force, prevent the rotation of key components such as adjusting ring, as the medium discharge pressure drops, to the spring force of the valve clack back to the seat when the seat pressure, and in the process of adjusting the position of valve stem by adjusting nut to adjust opening pressure and other parameters, the anti -rotation structure can guarantee the stability of adjusting component, maintain the adjustment accuracy and safety valve performance.

[0004] In the actual use process of safety valve with anti -rotation structure, there is a more tricky problem, although safety valve has anti -rotation design, aims to ensure the stable operation of key components, however, during equipment operation, when water pressure does not reach the specified condition, the sealing cover will still rotate, once the sealing cover rotates, it cannot tightly fit the interface, causing a part of water flow to flow out from the outlet pipe, this situation seriously interferes the normal function of safety valve, greatly affects the efficiency of safety valve with anti -rotation structure in system, not only causes water resource waste, but also has negative chain reaction on the operation stability of the whole equipment and subsequent process. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a safety valve with anti -rotation structure, aims to improve the problem that the sealing cover will rotate when water pressure does not meet the condition in equipment use process, causing a part of water flow to flow out from the outlet pipe.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a safety valve with anti -rotation structure, including the outflow pipe, the outflow pipe inside fixedly connected with the inlet pipe, the inlet pipe top is provided with sealing assembly, the outflow pipe inside slidingly connected with connecting rod, the outflow pipe top fixedly connected with sealing tube, the connecting rod outer wall fixedly connected with fixed ring no.

[0007] The sealing assembly includes a sealing cover and a plurality of fixed columns, the sealing cover is slidably connected to the top of the inlet pipe, and the bottom of each fixed column is fixedly connected to the top of the inlet pipe.

[0008] Further description of the above technical scheme:

[0009] The extrusion assembly includes an extrusion ring one, a spring one and an extrusion ring two, the extrusion ring one is slidably connected to the inner wall of the sealing tube, the spring one is arranged in the sealing tube, one end of the spring one is fixedly connected to the top of the extrusion ring one, the other end of the spring one is fixedly connected to the bottom of the extrusion ring two, and the top of the extrusion ring two is fixedly connected to the bottom of the fixed ring two.

[0010] Further description of the above technical scheme:

[0011] The bottom of the outflow pipe is fixedly connected with the inflow pipe, and the bottom of the inflow pipe is fixedly connected with the flange.

[0012] Further description of the above technical scheme:

[0013] The flange is internally provided with a plurality of fixed holes, and the bottom of the flange is fixedly connected with a plurality of connecting columns.

[0014] Further description of the above technical scheme:

[0015] The outer wall of each connecting column is provided with a fixed groove, and the inner wall of the flange is slidably connected with a plurality of connecting rings.

[0016] Further description of the above technical scheme:

[0017] The flange is internally provided with a plurality of spring two, one end of each spring two is fixedly connected to the inner wall of the flange, and the other end of each spring two is fixedly connected to one side of the connecting ring.

[0018] Further description of the above technical scheme:

[0019] The bottom of the flange is provided with a plurality of connecting grooves, and the connecting grooves are arranged in an annular array on the bottom of the flange.

[0020] As a further description of the above technical solutions:

[0021] The fixing holes are arranged in a ring array inside the flange, and the connecting columns are fixedly connected in a ring array at the bottom of the flange.

[0022] The utility model has the advantages of the following:

[0023] 1. In the utility model, when the internal pressure of the pipeline is too large, the water flow will impact the sealing cover to lift it along the outer wall of the fixed column, and when the internal pressure of the pipeline decreases, the sealing cover will move downward along the outer wall of the fixed column, thereby resealing the inlet pipe, so that the sealing cover can return to the original position without rotating after the water pressure decreases during equipment use, avoiding the problem that the sealing cover will rotate to cause part of the water flow to flow out of the outlet pipe when the water pressure does not meet the conditions during equipment use, thereby improving the efficiency of the safety valve with the anti-rotation structure.

[0024] 2. In the utility model, first align the connecting columns at the top of the water pipe with the connecting grooves at the bottom of the flange, then move them closer to each other so that the connecting columns enter the inside of the connecting grooves, and then the connecting columns extrude the connecting ring to enter the inside of the flange, and when reaching the deepest part, the connecting ring is ejected into the fixed groove under the action of spring two, thereby achieving the effect of easily positioning the position of the equipment and the water pipe during equipment use to make the connection more convenient and fast, avoiding the problem that the position between the equipment and the water pipe is easily displaced during equipment use, affecting the connection of the two by the operating personnel, thereby improving the convenience of the safety valve with the anti-rotation structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A perspective view of a safety valve with an anti-rotation structure is proposed for the utility model;

[0026] Figure 2 A sealing pipe internal structure diagram of a safety valve with an anti-rotation structure is proposed for the utility model;

[0027] Figure 3 A flange internal structure diagram of a safety valve with an anti-rotation structure is proposed for the utility model.

[0028] LEGEND:

[0029] 1. Outlet pipe; 2. Inlet pipe; 3. Sealing cover; 4. Fixed column; 5. Connecting rod; 6. Sealing pipe; 7. Fixed ring one; 8. Extrusion ring one; 9. Spring one; 10. Extrusion ring two; 11. Fixed ring two; 12. Sealing shell; 13. Inflow pipe; 14. Flange; 15. Fixing hole; 16. Connecting column; 17. Fixed groove; 18. Connecting ring; 19. Spring two; 20. Connecting groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0031] With reference to Figure 1 And Figure 2 An embodiment provided by the utility model: a safety valve with anti-rotation structure, including outflow pipe 1, the inside fixedly connected with inlet pipe 2 of outflow pipe 1 is used for guiding water flow, the top of inlet pipe 2 is provided with sealing assembly and is used for sealing inlet pipe 2, the inside slidingly connected with connecting rod 5 of outflow pipe 1 is used for connecting sealing cover 3, the top fixedly connected with sealing pipe 6 of outflow pipe 1 is used for accommodating extrusion assembly, the outer wall of connecting rod 5 is fixedly connected with fixed ring one 7 and is used for lifting extrusion ring one 8, the inside fixedly connected with fixed ring two 11 of sealing pipe 6 is used for connecting extrusion ring two 10, one end of fixed ring two 11 is provided with extrusion assembly, the top fixedly connected with sealing shell 12 of sealing pipe 6 is used for accommodating connecting rod 5;

[0032] Sealing assembly includes sealing cover 3 and multiple fixed columns 4, the bottom slidingly connected with inlet pipe 2 top of sealing cover 3 is used for sealing inlet pipe 2, the bottom of each fixed column 4 is fixedly connected with inlet pipe 2 top and is used for limiting the rotation of sealing cover 3, the outer wall of each fixed column 4 is penetrated in sealing cover 3 inside, extrusion assembly includes extrusion ring one 8, spring one 9 and extrusion ring two 10, the outer wall slidingly connected with sealing pipe 6 inner wall of extrusion ring one 8 is used for extruding spring one 9, spring one 9 is arranged in sealing pipe 6 inside and provides support force for sealing cover 3, one end of spring one 9 is fixedly connected with extrusion ring one 8 top, the other end of spring one 9 is fixedly connected with extrusion ring two 10 bottom, the top of extrusion ring two 10 is fixedly connected with fixed ring two 11 bottom and is used for fixing spring one 9.

[0033] Specifically, when the pressure inside the pipeline increases sharply, the water flow hits the sealing cover 3, under the impact of this strong water pressure, the sealing cover 3 is forced to lift up, then the lifting action of the sealing cover 3 drives the extrusion ring one 8 connected thereto to move upward synchronously, the upward movement of the extrusion ring one 8 causes the spring one 9 to be strongly extruded, and in the elastic deformation process of the spring one 9, the water flow finds a path for export, thereby realizing the reduction of water pressure, and then, when the water pressure gradually stabilizes, the spring one 9 plays its role of elastic recovery, and the sealing cover 3 is bounced back to the top of the inlet pipe 2, and during this period, the fixed column 4 at the top of the inlet pipe 2 has been limiting the rotation of the sealing cover 3, ensuring that the entire system returns to a stable state.

[0034] Refer to Figure 3 The bottom of the outflow pipe 1 is fixedly connected with an inflow pipe 13 for guiding water flow. The bottom of the inflow pipe 13 is fixedly connected with a flange 14 for connecting with a water pipe. A plurality of fixing holes 15 are formed in the flange 14 for accommodating screws. A plurality of connecting columns 16 are fixedly connected to the bottom of the flange 14 for abutting the flange 14 and the water pipe. A fixing groove 17 is formed in the outer wall of each connecting column 16 for accommodating a connecting ring 18. A plurality of connecting rings 18 are slidably connected in the flange 14 for fixing the connecting columns 16. A plurality of springs 19 are arranged in the flange 14 for providing elastic force to the connecting rings 18. One end of each spring 19 is fixedly connected to the flange 14, and the other end of each spring 19 is fixedly connected to one side of the connecting ring 18. A plurality of connecting grooves 20 are formed in the bottom of the flange 14 for accommodating the connecting columns 16. The connecting grooves 20 are arranged in a ring array in the bottom of the flange 14. The fixing holes 15 are arranged in a ring array in the flange 14. The connecting columns 16 are fixedly connected to the bottom of the flange 14 in a ring array.

[0035] Specifically, when installing the device, the operator first aligns the connecting column 16 at the top of the water pipe with the connecting groove 20 at the bottom of the flange 14, and then the operator moves them closer to each other. In this process, the connecting column 16 gradually enters the connecting groove 20, and as the connecting column 16 penetrates deeper, it begins to squeeze the connecting ring 18, forcing the connecting ring 18 into the flange 14. When the connecting column 16 reaches the deepest part of the connecting groove 20, the connecting ring 18 enters the fixing groove 17 under the elastic action of the spring 19. In this way, the device and the water pipe are tightly connected and firmly fixed, laying a solid foundation for the normal operation of the subsequent device.

[0036] Working principle: In the process of using the safety valve with the anti-rotation structure, first align the connecting column 16 at the top of the water pipe with the connecting groove 20 at the bottom of the flange 14, and then move them closer to each other so that the connecting column 16 enters the connecting groove 20, and then the connecting column 16 squeezes the connecting ring 18 to make it enter the flange 14. When it reaches the deepest part, the connecting ring 18 is ejected into the fixing groove 17 under the action of the spring 19, thereby connecting and fixing the device and the water pipe to put the device into normal use. When the internal pressure of the pipeline is too large, the water flow will impact the sealing cover 3, causing it to lift, and then drive the squeezing ring 8 to move upward, causing the spring 9 to be squeezed and then guiding the water flow out to reduce the water pressure. Then, when the water pressure decreases, the sealing cover 3 will rebound under the action of the spring 9 to enter the top of the inlet pipe 2, so that the sealing cover 3 reseals the inlet pipe 2 along the outer wall of the fixed column 4, thereby limiting the rotation of the sealing cover 3.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A safety valve with anti-rotation structure, comprising an outflow pipe (1), characterized in that: The outflow pipe (1) is internally and fixedly connected with an inlet pipe (2), the top of the inlet pipe (2) is provided with a sealing assembly, the inside of the outflow pipe (1) is slidably connected with a connecting rod (5), the top of the outflow pipe (1) is fixedly connected with a sealing pipe (6), the outer wall of the connecting rod (5) is fixedly connected with a fixed ring one (7), the inside of the sealing pipe (6) is fixedly connected with a fixed ring two (11), one end of the fixed ring two (11) is provided with an extrusion assembly, the top of the sealing pipe (6) is fixedly connected with a sealing shell (12). The sealing assembly comprises a sealing cover (3) and a plurality of fixed columns (4), the bottom of the sealing cover (3) is slidably connected to the top of the inlet pipe (2), and the bottom of each fixed column (4) is fixedly connected to the top of the inlet pipe (2).

2. A safety valve with anti-rotation structure according to claim 1, characterized in that: The extrusion assembly comprises an extrusion ring one (8), a spring one (9) and an extrusion ring two (10), the outer wall of the extrusion ring one (8) is slidably connected to the inner wall of the sealing pipe (6), the spring one (9) is arranged in the sealing pipe (6), one end of the spring one (9) is fixedly connected to the top of the extrusion ring one (8), the other end of the spring one (9) is fixedly connected to the bottom of the extrusion ring two (10), and the top of the extrusion ring two (10) is fixedly connected to the bottom of the fixed ring two (11).

3. The safety valve with anti-rotation structure according to claim 1, characterized in that: The bottom of the outflow pipe (1) is fixedly connected with an inflow pipe (13), and the bottom of the inflow pipe (13) is fixedly connected with a flange (14).

4. A relief valve having a rotation preventing structure according to claim 3, characterized in that: A plurality of fixed holes (15) are formed in the inside of the flange (14), and a plurality of connecting columns (16) are fixedly connected to the bottom of the flange (14).

5. A relief valve having a rotation preventing structure according to claim 4, characterized in that: A fixed groove (17) is formed in the outer wall of each connecting column (16), and a plurality of connecting rings (18) are slidably connected to the inside of the flange (14).

6. A relief valve having a rotation preventing structure according to claim 3, characterized in that: A plurality of spring twos (19) are arranged in the inside of the flange (14), one end of each spring two (19) is fixedly connected to the inside of the flange (14), and the other end of each spring two (19) is fixedly connected to one side of the connecting ring (18).

7. A relief valve having a rotation preventing structure according to claim 3, characterized in that: A plurality of connecting grooves (20) are formed in the bottom of the flange (14), and the connecting grooves (20) are arranged in an annular array in the bottom of the flange (14).

8. A relief valve having a rotation preventing structure according to claim 4, characterized in that: The fixed holes (15) are arranged in an annular array in the inside of the flange (14), and the connecting columns (16) are fixedly connected in an annular array to the bottom of the flange (14).

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