Duplex spring safety valve

Abstract

The utility model relates to the technical field of safety valves, in particular to a duplex spring safety valve. Comprising a safety valve body and a butt joint pipe, lifters are arranged on the upper end surface of the safety valve body, an adjusting device is arranged at the position, corresponding to the butt joint pipe, of the arc face of a discharge pipe, the adjusting device comprises a plurality of fixing frames, one end of each fixing frame is fixedly connected with the arc face of the discharge pipe, and rotating rods are rotationally connected to the inner walls of the fixing frames; the arc surface of the rotating rod is in threaded connection with an extrusion ring, the arc surface of the butt joint pipe is fixedly connected with a connecting ring, clamping frames are fixedly connected to the positions, corresponding to the rotating rod, of the arc surface of the connecting ring, the section of each clamping frame is in a U shape, and the inner wall of each clamping frame is connected with the arc surface of the rotating rod in a clamped mode. The ends, close to each other, of the butt joint pipe and the discharge pipe are slidably connected with the same neck bush in an inserted mode. The duplex spring safety valve provided by the utility model has the advantage that the whole safety valve pipelines can be conveniently mounted and limited.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a double-connected spring safety valve. Background Art

[0002] A spring-loaded safety valve relies on the elastic pressure of a spring to lock the valve, plunger or other sealing parts of the valve. Once the pressure in the pressure vessel is abnormal, the high pressure generated will overcome the spring pressure of the safety valve, so the locking device will be pushed open, forming a pressure relief channel to release the high pressure. This is more common in safety valve equipment.

[0003] The prior art includes a utility model with a publication number of CN203146939U, which discloses a double spring safety valve, which includes a connected valve body and a valve seat, an adjusting nut is screwed on the upper end of the valve body, and corresponding upper spring guide pads and lower spring guide pads are fixedly installed on the top of the adjusting nut and in the valve body, respectively, and spring seats are respectively arranged in the upper and lower spring guide pads, and a compression spring is connected between the two spring seats, and a valve flap corresponding to the valve seat is installed at the lower end of the lower spring guide pad, and the valve flap is pressed against the upper end of the valve seat by the pressure of the compression spring, and an annular sealing protrusion protruding outward is arranged on the sealing surface where the valve flap and the valve seat meet. The utility model has a simple and reasonable structure, and adopts a design of arranging an annular sealing protrusion protruding outward on the sealing surface where the valve flap and the valve seat meet, which effectively improves the wear resistance of the valve flap, and can still maintain good sealing after being worn for a long time, thereby extending the service life of the safety valve and ensuring the normal use of the safety valve.

[0004] It was found in the use of safety valve equipment that during the operation of the double spring safety valve, due to the long-term operation of the safety valve, the installed pipes on one side of the safety valve are prone to aging and breaking, which makes it inconvenient to continue to operate the safety valve. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that, during the operation and use of the double-spring safety valve, the pipes installed on one side of the safety valve are prone to aging and fracture due to long-term operation and use of the safety valve, which makes it inconvenient to continue to operate the safety valve.

[0006] In order to solve the above technical problems, the utility model provides a double-linked spring safety valve, comprising: a safety valve body and a butt joint pipe, both end surfaces of the safety valve body are fixedly connected with a discharge pipe, the upper end surface of the safety valve body is provided with a lifter, the arc surface of the discharge pipe is provided with an adjustment device at the position of the butt joint pipe, the adjustment device comprises a plurality of fixing frames, one end of each of the fixing frames is fixedly connected with the arc surface of the discharge pipe, the inner wall of each of the fixing frames is rotatably connected with a rotating rod, the arc surface of the rotating rod is threadedly connected with an extrusion ring, the arc surface of the butt joint pipe is fixedly connected with a connecting ring, the arc surface of the connecting ring is fixedly connected with a clamping frame at the position corresponding to the rotating rod, the cross-section of the clamping frame is "U"-shaped, the inner wall of the clamping frame is clamped with the arc surface of the rotating rod, and the butt joint pipe and the discharge pipe are slidably connected with the same inner sleeve at one end close to each other.

[0007] The effect achieved by the above components is: during the operation and use of the double-link spring safety valve, the discharge pipe and the other docking pipe need to be installed and limited so that they can be used through. During this process, in order to facilitate the fixed limit of the discharge pipe and the docking pipe, the inner sleeve is first plugged into the docking pipe and the discharge pipe, and then the rotating rod on the surface of the discharge pipe is rotated with the help of a fixing frame, so that the rotating rod and the docking pipe surface are clamped with a clamping frame fixed with a connecting ring, and then the extrusion ring on the surface of the rotating rod is rotated and extruded, so that the entire docking pipe and the auxiliary pipe are docked and limited to avoid cumbersome fixation.

[0008] Preferably, a protective sleeve is fixedly connected to the arc surface of the rotating rod, and the protective sleeve is a silicone sleeve.

[0009] The effect achieved by the above components is that the protective sleeve made of silicone material fixed on the surface of the rotating rod can be effectively clamped with the inner wall of the clamping frame to prevent the rotating rod from loosening and falling off.

[0010] Preferably, both ends of the inner wall of the fixing frame are sleeved with coil springs, and both ends of the coil spring are fixedly connected to the rotating rod and the fixing frame respectively.

[0011] The effect achieved by the above components is that the torsional force generated by the coil spring can effectively assist in squeezing and limiting the position of the rotating rod.

[0012] Preferably, the arc surface of the rotating rod is movably connected with a positioning frame, and one end of the positioning frame is plugged into the side wall of the card frame.

[0013] The effect achieved by the above components is that during the process of clamping the rotating rod and the clamping frame, the positioning frame can be used for plugging and fixing to prevent the rotating rod from falling off.

[0014] Preferably, an auxiliary device is provided at a position of the lifter corresponding to the upper end surface of the safety valve body, and the auxiliary device includes a limit frame, one side of the limit frame is fixedly connected to the surface of the safety valve, and moving rods are threaded through the side walls at both ends of the limit frame, and an auxiliary block is fixedly connected to the end of the moving rod away from the lifter, and the end of the moving rod close to the lifter is rotatably connected to the limit frame, the cross-section of the limit frame is "U"-shaped, and the inner wall of the limit frame abuts against the surface of the lifter.

[0015] The effect achieved by the above components is: in the process of operating and using the double spring safety valve, it is necessary to use the lifter at the upper end of the safety valve for auxiliary operation. In order to avoid accidental touching of the lifter, the limit frame is used for protection at this time. The auxiliary blocks on both sides of the limit frame are rotated to allow the auxiliary blocks to drive the moving rod to move the position of the limit frame, so that the limit frame and the position of the lifter are squeezed and protected to avoid displacement of the lifter position.

[0016] Preferably, both side surfaces of the limiting frame slide through the limiting rods, and one end of the limiting rods is fixedly connected to the limiting frame.

[0017] The effect achieved by the above components is that during the process of moving and adjusting the position of the limit frame, the limit rods on both sides of the limit frame can be used to limit the moving position of the limit frame.

[0018] Preferably, the inner walls of the limiting frame are fixedly connected with friction pads, and the friction pads are rubber pads.

[0019] The effect achieved by the above components is: the friction can be increased by the friction pad made of rubber material, so as to facilitate better squeezing and fixing between the limit frame and the lifter.

[0020] Compared with the related art, the double spring safety valve provided by the utility model has the following beneficial effects:

[0021] The utility model provides a double-linked spring safety valve. During the operation and use of the double-linked spring safety valve, it is necessary to install and limit the discharge pipe and another docking pipe so as to use them through. During this process, in order to facilitate the fixed limit of the discharge pipe and the docking pipe, the inner sleeve is first plugged into the docking pipe and the discharge pipe, and then a rotating rod is used to rotate on the surface of the discharge pipe with the help of a fixing frame, so that the rotating rod and the docking pipe surface are clamped with a clamping frame fixed with a connecting ring, and then an extrusion ring on the surface of the rotating rod is rotated and extruded, so that the entire docking pipe and the auxiliary pipe are docked and limited, avoiding cumbersome fixation. During the clamping of the rotating rod and the clamping frame, a positioning frame can be used for plugging and fixing to avoid the position of the rotating rod from falling off. By operating the adjusting device, the installation limit between the discharge pipe and the docking pipe in the safety valve is achieved, which is convenient for replacing and limiting the pipelines after the safety valve is used for a long time.

[0022] During the operation and use of the double-spring safety valve, it is necessary to use the lifter on the upper end of the safety valve for auxiliary operation. In order to avoid accidental touching of the lifter, a limit frame is used for protection at this time. The auxiliary blocks on both sides of the limit frame are rotated to allow the auxiliary blocks to drive the moving rod to move the position of the limit frame, thereby allowing the limit frame and the position of the lifter to be squeezed and protected to avoid displacement of the lifter position. During the movement and adjustment of the position of the limit frame, the limit rods on both sides of the limit frame can be used to limit the moving position of the limit frame. By operating the auxiliary device, the position of the lifter on the upper end of the safety valve is limited to avoid accidental touching, which makes the safety valve unable to operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a double spring safety valve provided by the utility model;

[0024] Figure 2 for Figure 1 The structural schematic diagram of the regulating device shown;

[0025] Figure 3 for Figure 2 The schematic diagram of the split structure of the regulating device shown;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the auxiliary device shown.

[0027] Numbers in the figure: 1. Safety valve body; 2. Discharge pipe; 3. Lifter; 4. Adjusting device; 41. Fixed frame; 42. Rotating rod; 43. Coil spring; 44. Connecting ring; 45. Extrusion ring; 46. Card frame; 47. Protective sleeve; 48. Positioning frame; 49. Inner sleeve; 5. Auxiliary device; 51. Limiting frame; 52. Moving rod; 53. Auxiliary block; 54. Limiting frame; 55. Limiting rod; 56. Friction pad; 6. Butt pipe. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0030] See also Figures 1 to 4 The double spring safety valve provided by the embodiment of the utility model comprises: a safety valve body 1 and a butt joint 6, both end surfaces of the safety valve body 1 are fixedly connected with a discharge pipe 2, a lifter 3 is arranged on the upper end surface of the safety valve body 1, an adjusting device 4 is arranged at the position of the arc surface of the discharge pipe 2 facing the butt joint 6, and an auxiliary device 5 is arranged at the position of the lifter 3 on the upper end surface of the safety valve body 1.

[0031] In the embodiments of the present invention, please refer to Figure 2 and Figure 3 The adjusting device 4 includes a plurality of fixing frames 41, one end of each of the fixing frames 41 is fixedly connected to the arc surface of the discharge pipe 2, the inner wall of each fixing frame 41 is rotatably connected to a rotating rod 42, the arc surface of the rotating rod 42 is threadedly connected to an extrusion ring 45, the arc surface of the butt-joint pipe 6 is fixedly connected to a connecting ring 44, and the arc surface of the connecting ring 44 corresponding to the rotating rod 42 is fixedly connected to a clamping frame 46, the cross section of the clamping frame 46 is "U"-shaped, and the inner wall of the clamping frame 46 is connected to the rotating rod The arc surface of 42 is snapped together, and the end of the butt joint pipe 6 and the discharge pipe 2 close to each other is slidably connected with the same inner liner 49, the arc surface of the rotating rod 42 is fixedly connected with a protective sleeve 47, and the protective sleeve 47 is a silicone sleeve. The inner wall of the fixing frame 41 is sleeved with coil springs 43 at both ends, and the two ends of the coil spring 43 are respectively fixedly connected to the rotating rod 42 and the fixing frame 41, and the arc surface of the rotating rod 42 is movably connected with a positioning frame 48, and one end of the positioning frame 48 is plugged into the side wall of the card frame 46;

[0032] In the embodiments of the present invention, please refer to Figure 4The auxiliary device 5 includes a limit frame 51, one side of the limit frame 51 is fixedly connected to the surface of the safety valve, and the side walls at both ends of the limit frame 51 are threaded with a moving rod 52, and the end of the moving rod 52 away from the lifter 3 is fixedly connected to the auxiliary block 53, and the end of the moving rod 52 close to the lifter 3 is rotatably connected to the limit frame 54, and the cross-section of the limit frame 54 is "U"-shaped, and the inner wall of the limit frame 54 abuts against the surface of the lifter 3. The two side surfaces of the limit frame 51 are slidably penetrated by the limit rod 55, and one end of the limit rod 55 is fixedly connected to the limit frame 54, and the inner wall of the limit frame 54 is fixedly connected with a friction pad 56, which is a rubber pad;

[0033] The working principle of the double spring safety valve provided by the utility model is as follows: in the process of operating and using the double spring safety valve, the discharge pipe 2 and the other docking pipe 6 need to be installed and limited so as to be used through. In this process, in order to facilitate the fixed limit of the discharge pipe 2 and the docking pipe 6, the inner sleeve 49 is first plugged into the docking pipe 6 and the discharge pipe 2, and then the rotating rod 42 on the surface of the discharge pipe 2 is rotated by the fixing frame 41, so that the rotating rod 42 and the clamping frame 46 fixed by the connecting ring 44 on the surface of the docking pipe 6 are clamped, and then the extrusion ring 45 on the surface of the rotating rod 42 is rotated and extruded, so as to dock and limit the entire docking pipe 6 with the auxiliary pipe, avoiding cumbersome fixation, and in the process of clamping the rotating rod 42 and the clamping frame 46, the positioning frame 48 is plugged and fixed to the surface of the clamping frame 46 to avoid the position of the rotating rod 42 from falling off, thereby limiting the installation between the drain pipe and the docking pipe 6 in the safety valve, and facilitating the replacement and limiting of the pipelines after the safety valve is used for a long time.

[0034] When operating the double-spring safety valve, it is necessary to use the lifter 3 at the upper end of the safety valve for auxiliary operation. In order to avoid accidental touching of the lifter 3, the limit frame 54 is used for protection at this time. The auxiliary blocks 53 on both sides of the limit frame 51 are rotated to allow the auxiliary blocks 53 to drive the moving rod 52 to move the position of the limit frame 54, so that the limit frame 54 and the position of the lifter 3 are squeezed and protected to avoid the displacement of the position of the lifter 3. In the process of moving and adjusting the position of the limit frame 54, the limit rods 55 on both sides of the limit frame 51 slide along the surface of the limit frame 51 to drive the position of the limit frame 54 to limit, thereby effectively limiting the position of the lifter 3 at the upper end of the safety valve to avoid accidental touching, which makes the safety valve unable to be operated normally.

[0035] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Double spring safety valve, characterized in that: include: A safety valve body (1) and a butt joint (6), wherein both end surfaces of the safety valve body (1) are fixedly connected to a discharge pipe (2), and a lifter (3) is provided on the upper end surface of the safety valve body (1). An adjustment device (4) is provided at a position where the arc surface of the discharge pipe (2) faces the butt joint (6), and the adjustment device (4) comprises a plurality of fixing frames (41), one end of each of the fixing frames (41) is fixedly connected to the arc surface of the discharge pipe (2), and the inner wall of each of the fixing frames (41) is rotatably connected to a rotating member. The rotating rod (42) has an arc surface that is threadedly connected to an extrusion ring (45), the arc surface of the butt joint pipe (6) is fixedly connected to a connection ring (44), and the arc surface of the connection ring (44) is fixedly connected to a clamping frame (46) at a position corresponding to the rotating rod (42), the clamping frame (46) has a "U"-shaped cross section, and the inner wall of the clamping frame (46) is clamped to the arc surface of the rotating rod (42), and the butt joint pipe (6) and the discharge pipe (2) are slidably connected to one end that is close to each other and is plugged into a common inner sleeve (49).

2. The double spring safety valve according to claim 1, characterized in that: The arc surface of the rotating rod (42) is fixedly connected to a protective sleeve (47), and the protective sleeve (47) is a silicone sleeve.

3. The double spring safety valve according to claim 1, characterized in that: Both ends of the inner wall of the fixing frame (41) are sleeved with coil springs (43), and both ends of the coil spring (43) are fixedly connected to the rotating rod (42) and the fixing frame (41) respectively.

4. The double spring safety valve according to claim 1, characterized in that: The arc surface of the rotating rod (42) is movably connected to a positioning frame (48), and one end of the positioning frame (48) is plugged into a side wall of the clamping frame (46).

5. The double spring safety valve according to claim 1, characterized in that: An auxiliary device (5) is provided at a position of the upper end surface of the safety valve body (1) corresponding to the lifter (3), and the auxiliary device (5) comprises a limit frame (51), one side of the limit frame (51) is fixedly connected to the surface of the safety valve, and moving rods (52) are threadedly penetrated through the side walls at both ends of the limit frame (51), and the end of the moving rod (52) away from the lifter (3) is fixedly connected to an auxiliary block (53), and the end of the moving rod (52) close to the lifter (3) is rotatably connected to a limit frame (54), and the cross-section of the limit frame (54) is "U"-shaped, and the inner wall of the limit frame (54) is in contact with the surface of the lifter (3).

6. The double spring safety valve according to claim 5, characterized in that: The two side surfaces of the limiting frame (51) are slidably penetrated by limiting rods (55), and one end of the limiting rods (55) is fixedly connected to the limiting frame (54).

7. The double spring safety valve according to claim 5, characterized in that: The inner wall of the limiting frame (54) is fixedly connected with a friction pad (56), and the friction pad (56) is a rubber pad.

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