Straight-flow safety valve

Abstract

The utility model discloses a straight flow type safety valve which comprises a safety valve body, the upper surface of the safety valve body is fixedly connected with an installation cover body through a flange, the upper surface of the installation cover body is provided with an annular sliding groove, and the inner wall of the annular sliding groove is slidably connected with arc-shaped sliding blocks distributed in an annular array in a sleeved mode. The upper surfaces of the multiple arc-shaped sliding blocks are fixedly connected with threaded rings, the lower surfaces of the threaded rings make contact with the upper surface of the mounting cover body, the upper surfaces of the threaded rings are fixedly connected with connecting rods distributed in an annular array, and one ends of the multiple connecting rods are fixedly connected with adjusting rotary discs. The effects that the limit value of the medium is accurately adjusted by the safety valve body, the stability of the safety valve body in use is improved, and the use safety of the safety valve body is improved by stably adjusting the pressure of the supporting spring are achieved.

Description

Technical Field

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

[0002] A safety valve is a valve that discharges medium to the outside when the medium pressure in a pipeline or equipment rises to a specified value to prevent damage to the equipment or pipeline caused by excessive internal pressure. It balances the fluid and the external atmosphere by sealing liquid. The safety valve is a special valve that is normally closed under the action of external force. When the medium pressure in the equipment or pipeline rises to more than the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. The safety valve belongs to the automatic valve category and is mainly used in boilers, pressure vessels and pipelines to control the pressure not to exceed the specified value, playing an important protective role in personal safety and equipment operation.

[0003] For example, a distributed photovoltaic array DC side safety valve disclosed in a Chinese patent document (Announcement No.: CN218761648U) facilitates the circulation of the medium that needs to be regulated through a connecting rod, and uses a sealing plate to fit the top of the connecting rod to seal it, and adjusts the leaking medium upward after being over-pressurized. At the same time, several reinforcing rods are used to support and stabilize the connecting rod to avoid damage caused by excessive pressure that affects its use. At the same time, a reinforcing plate is used to support the reinforcing rod, and at the same time, the reinforcing rod is supported and stabilized in conjunction with a reinforcing spring, which fully improves the compressive stability effect of the connecting rod, and a stabilizing rod is used to limit and stabilize the reinforcing spring and the reinforcing rod.

[0004] However, there are still the following shortcomings:

[0005] When adjusting the elastic force of the safety spring, the rotation of the adjusting rod will drive the adjusting plate to rotate, and the threaded connection will drive the adjusting plate to move downward for adjustment. However, the rotation of the adjusting plate will cause one end of the safety spring to come into contact with the adjusting plate. Without fixing the two ends of the safety spring, the squeezing force applied by the adjusting disk to one end of the safety spring may easily cause one end of the safety spring to tilt and deviate, thereby failing to ensure the stable operation of the safety valve. Utility Model Content

[0006] In view of the defects in the prior art, the utility model provides a direct current safety valve, which can accurately adjust the limit value of the medium through the safety valve body, thereby improving the stability of the safety valve body during use, and can stably adjust the pressure of the support spring, thereby improving the safety effect of the safety valve body during use.

[0007] The utility model provides a direct-flow safety valve, comprising a safety valve body, the upper surface of the safety valve body is fixedly connected to a mounting cover body through a flange, the upper surface of the mounting cover body is provided with an annular slide groove, the inner wall of the annular slide groove is slidably sleeved with arc-shaped sliders distributed in an annular array, the upper surfaces of a plurality of the arc-shaped sliders are fixedly connected to threaded rings, the lower surfaces of the threaded rings are in contact with the upper surface of the mounting cover body, the upper surface of the threaded rings are fixedly connected to connecting rods distributed in an annular array, and one end of the plurality of connecting rods is fixedly connected to an adjusting dial;

[0008] The inner wall of the threaded ring is provided with a precision adjustment device, and the precision adjustment device comprises an external threaded tube, and the outer surface of the external threaded tube is threadedly connected to the inner wall of the threaded ring.

[0009] Preferably, one end of the externally threaded tube passes through and extends to the interior of the installation cover body, and one end of the externally threaded tube is fixedly connected to an annular adjustment plate.

[0010] Preferably, symmetrically distributed pressure sensors are fixedly mounted on the lower surface of the annular adjustment plate, an annular sealing gasket is fixedly mounted on the inner bottom wall of the safety valve body, and a sealing block is movably sleeved on the inner wall of the safety valve body.

[0011] Preferably, the lower surface of the sealing block contacts the upper surface of the annular sealing gasket, the upper surface of the sealing block is fixedly connected with a movable rod, and the outer surface of the movable rod is movably sleeved with the inner wall of the externally threaded tube.

[0012] Preferably, one end of the movable rod passes through and extends to the upper surface of the installation cover, one end of the movable rod is fixedly connected to an emergency pull ring, and the upper surface of the sealing block is fixedly connected to a support spring.

[0013] Preferably, one end of the support spring is fixedly connected to a positioning pressure plate, the outer surface of the positioning pressure plate is movably sleeved with the inner wall of the mounting cover, and the inner wall of the positioning pressure plate is movably sleeved with the outer surface of the movable rod.

[0014] Preferably, the upper surface of the positioning pressure plate contacts the lower surfaces of the two pressure sensors, a pressure display is fixedly installed on the outer surface of the mounting cover, a medium inlet pipe is fixedly connected to the lower surface of the safety valve body, and a medium outlet pipe is fixedly connected to the outer surface of the safety valve body.

[0015] The beneficial effects of the utility model are embodied in:

[0016] By setting up a precise adjustment device, the safety valve body can be precisely adjusted to the limit value of the medium, thereby improving the stability of the safety valve body during use, and by stably adjusting the pressure of the support spring, the safety of the safety valve body can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0018] Figure 1 This is a front view of a direct-flow safety valve provided by the utility model;

[0019] Figure 2 for Figure 1 A three-dimensional diagram of the safety valve body structure of a direct-flow safety valve is shown;

[0020] Figure 3 for Figure 1 An exploded view of the installation cover structure of a direct-flow safety valve is shown;

[0021] Figure 4 for Figure 1 An exploded view of the sealing block structure of a direct-flow safety valve is shown.

[0022] In the attached drawings, 1. safety valve body; 2. mounting cover; 3. annular slide groove; 4. arc-shaped slider; 5. threaded ring; 6. connecting rod; 7. adjusting dial; 8. external threaded pipe; 81. annular adjustment plate; 82. pressure sensor; 83. annular sealing gasket; 84. sealing block; 85. movable rod; 86. emergency pull ring; 87. supporting spring; 88. positioning pressure plate; 89. pressure display; 810. medium inlet pipe; 811. medium outlet pipe. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0024] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0025] Reference Figure 1-4A direct current safety valve comprises a safety valve body 1, the upper surface of the safety valve body 1 is fixedly connected with a mounting cover body 2 through a flange, an annular groove 3 is provided on the upper surface of the mounting cover body 2, an arc-shaped slider 4 distributed in an annular array is slidably sleeved on the inner wall of the annular groove 3, a plurality of arc-shaped sliders 4 are fixedly connected with threaded rings 5 ​​on the upper surfaces, the rotation of the threaded rings 5 ​​is performed by the cooperation of the arc-shaped slider 4 and the annular groove 3 to perform the positioning and rotation, the lower surface of the threaded ring 5 is in contact with the upper surface of the mounting cover body 2, the upper surface of the threaded ring 5 is fixedly connected with connecting rods 6 distributed in an annular array, and one end of the plurality of connecting rods 6 is fixedly connected with an adjusting dial 7;

[0026] The inner wall of the threaded ring 5 is provided with a precision adjustment device, and the precision adjustment device includes an external threaded tube 8 , and the outer surface of the external threaded tube 8 is threadedly connected to the inner wall of the threaded ring 5 .

[0027] One end of the external threaded tube 8 passes through and extends to the interior of the mounting cover body 2, and one end of the external threaded tube 8 is fixedly connected to an annular adjustment plate 81, and the external threaded tube 8 plays a role in driving the annular adjustment plate 81 to be raised and lowered. The lower surface of the annular adjustment plate 81 is fixedly installed with symmetrically distributed pressure sensors 82, and the inner bottom wall of the safety valve body 1 is fixedly installed with an annular sealing gasket 83. The inner wall of the safety valve body 1 is movably sleeved with a sealing block 84, and the lower surface of the sealing block 84 contacts the upper surface of the annular sealing gasket 83. The sealing block 84 and the annular sealing gasket 83 play a role of cooperative sealing, and the upper surface of the sealing block 84 is fixedly connected with a movable rod 85, and the outer surface of the movable rod 85 is movably sleeved with the inner wall of the external threaded tube 8.

[0028] One end of the movable rod 85 passes through and extends to the upper surface of the mounting cover body 2, and one end of the movable rod 85 is fixedly connected to an emergency pull ring 86, which serves to facilitate the movable rod 85 to perform emergency lifting and lifting. The upper surface of the sealing block 84 is fixedly connected to a support spring 87, and one end of the support spring 87 is fixedly connected to a positioning pressure plate 88, the outer surface of the positioning pressure plate 88 is movably sleeved with the inner wall of the mounting cover body 2, and the inner wall of the positioning pressure plate 88 is movably sleeved with the outer surface of the movable rod 85, and the upper surfaces of the positioning pressure plate 88 are in contact with the lower surfaces of the two pressure sensors 82, and a pressure display 89 is fixedly installed on the outer surface of the mounting cover body 2. The elastic force of the support spring 87 squeezes the positioning pressure plate 88 through the cooperation with the pressure sensor 82, so as to display the pressure value through the pressure display 89, thereby facilitating the staff to perform precise adjustment, and the lower surface of the safety valve body 1 is fixedly connected to a medium inlet pipe 810, and the outer surface of the safety valve body 1 is fixedly connected to a medium outlet pipe 811.

[0029] By providing a precise adjustment device, the safety valve body 1 can precisely adjust the limit value of the medium, thereby improving the stability of the safety valve body 1 during use, and by stably adjusting the pressure of the support spring 87, the safety of the safety valve body 1 can be improved.

[0030] Working principle: Step 1, the threaded ring 5 is driven to rotate by adjusting the rotation of the turntable 7 in coordination with the connecting rod 6. The rotation of the threaded ring 5 is positioned and rotated through the coordination of the arc-shaped slider 4 and the annular slide groove 3, thereby driving the external threaded tube 8 to move downward. The downward movement of the external threaded tube 8 squeezes the positioning pressure plate 88 through the annular adjustment plate 81, so that the positioning pressure plate 88 squeezes the support spring 87. The pressure sensor 82 transmits the value to the pressure display 89 through the squeezing force between the positioning pressure plate 88 and the annular adjustment plate 81, so that the staff can accurately adjust the limit value of the medium in the safety valve body 1;

[0031] Step 2. When the pressure of the medium flowing through the medium inlet pipe 810 is greater than the set value, the sealing block 84 is driven by the pressure of the medium to drive the support spring 87 to contract, thereby separating the sealing block 84 from the annular sealing gasket 83. At this time, the medium flows into the medium discharge pipe 811 through the safety valve body 1. When part of the medium flows away, the medium pressure is reduced, and the elastic force of the support spring 87 drives the sealing block 84 to move downward, thereby cooperating with the annular sealing gasket 83 to continue sealing. When an emergency occurs and the medium flowing through the pipe needs to be opened for circulation, the movable rod 85 is driven to move upward through the emergency pull ring 86, thereby driving the sealing block 84 to move upward, completing the emergency manual opening.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A direct-flow safety valve, comprising a safety valve body (1), characterized in that: The upper surface of the safety valve body (1) is fixedly connected to a mounting cover body (2) via a flange, an annular groove (3) is provided on the upper surface of the mounting cover body (2), an arc-shaped sliding block (4) distributed in an annular array is slidably sleeved on the inner wall of the annular groove (3), a plurality of arc-shaped sliding blocks (4) are fixedly connected to the upper surfaces of the plurality of arc-shaped sliding blocks (4), the lower surfaces of the threaded rings (5) are in contact with the upper surface of the mounting cover body (2), the upper surface of the threaded rings (5) are fixedly connected to connecting rods (6) distributed in an annular array, and one end of the plurality of connecting rods (6) is fixedly connected to an adjusting dial (7); The inner wall of the threaded ring (5) is provided with a precision adjustment device, and the precision adjustment device comprises an external threaded tube (8), the outer surface of the external threaded tube (8) being threadably connected to the inner wall of the threaded ring (5); One end of the externally threaded tube (8) penetrates through and extends into the interior of the mounting cover (2), and one end of the externally threaded tube (8) is fixedly connected to an annular adjustment plate (81); A symmetrically distributed pressure sensor (82) is fixedly mounted on the lower surface of the annular adjustment plate (81), an annular sealing gasket (83) is fixedly mounted on the inner bottom wall of the safety valve body (1), and a sealing block (84) is movably sleeved on the inner wall of the safety valve body (1); The lower surface of the sealing block (84) contacts the upper surface of the annular sealing gasket (83), the upper surface of the sealing block (84) is fixedly connected to a movable rod (85), and the outer surface of the movable rod (85) is movably sleeved with the inner wall of the externally threaded tube (8); One end of the movable rod (85) penetrates and extends to the upper surface of the installation cover (2), one end of the movable rod (85) is fixedly connected to an emergency pull ring (86), and the upper surface of the sealing block (84) is fixedly connected to a support spring (87); One end of the support spring (87) is fixedly connected to a positioning pressure plate (88), the outer surface of the positioning pressure plate (88) is movably sleeved with the inner wall of the mounting cover (2), and the inner wall of the positioning pressure plate (88) is movably sleeved with the outer surface of the movable rod (85).

2. A straight-through safety valve according to claim 1, characterized in that: The upper surface of the positioning pressure plate (88) contacts the lower surfaces of the two pressure sensors (82); a pressure display (89) is fixedly mounted on the outer surface of the mounting cover (2); a medium inlet pipe (810) is fixedly connected to the lower surface of the safety valve body (1); and a medium outlet pipe (811) is fixedly connected to the outer surface of the safety valve body (1).

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