Safety valve with indicating function

Abstract

The utility model relates to a safety valve with indicating function, including valve main body, valve clapper subassembly, valve cover, valve rod, elastic component, adjusting assembly, protective cover, the safety valve still include indicating component, the indicating component include nameplate scale, indicating rod, the nameplate scale connection in the valve cover's outer surface, and / or the protective cover's outer surface, indicating rod one end be connected in the elastic component on, and / or the valve rod, indicating rod other end with the nameplate scale cooperation indicates. The utility model's elastic compression amount visualization, can accurate judgment elastic compression amount whether meet standard, can accurate, fast adjusting setting pressure of safety valve, reduce sealing surface wear and tear risk, can visual judgment whether safety valve opens, and opening height whether satisfies standard requirement, simple structure, reliable, have good economy.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a safety valve with an indicating function. Background Technology

[0002] Safety valves are special equipment, serving as the last line of defense for devices, pipelines, pressure vessels, and other equipment. The opening of a safety valve also signifies the occurrence of an accident. Therefore, accurately determining whether a safety valve is open is a crucial task in maintenance and inspection. Users with the necessary resources or in special operating conditions typically equip safety valves with position indicators to determine their open / closed status.

[0003] Spring-loaded safety valves adjust the set pressure by adjusting the compression of the spring. To determine whether the spring has been compressed to the predetermined position, the screw pitch and number of rotations are usually calculated. However, due to manufacturing errors and the difficulty in accurately measuring the rotation angle, the compression distance will also have errors. These errors will lead to multiple adjustments until the set pressure meets the user's requirements. Multiple adjustments may also cause wear on the sealing surface, resulting in substandard sealing performance.

[0004] Configuring a position indicator helps adjust the set pressure; however, on the one hand, the structure of the safety valve is relatively complex and difficult to configure; on the other hand, position indicators are expensive and can only determine whether the safety valve is open, but cannot determine the opening distance. Summary of the Invention

[0005] The purpose of this invention is to provide a safety valve with an indication function, particularly a safety valve with an adjustment indication or an opening indication.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A safety valve with an indicating function includes a valve body, a valve disc assembly, a valve cover, a valve stem, a resilient assembly, an adjusting assembly, and a protective cover. The valve disc assembly cooperates with the valve body to close the valve body. The valve cover is disposed on the valve body. The valve stem is disposed inside the valve cover, and its lower end cooperates with the valve disc assembly. The resilient assembly is disposed inside the valve cover, providing an elastic force to the valve stem to move and drive the valve disc assembly to close the valve body. The adjusting assembly is connected to the valve stem and is used to adjust the set pressure for valve opening. The protective cover is disposed on the valve cover.

[0008] The safety valve further includes an indicating component, which includes a nameplate scale and an indicating rod. The nameplate scale is connected to the outer surface of the valve cover and / or the outer surface of the protective cover. One end of the indicating rod is connected to the elastic component and / or the valve stem, and the other end of the indicating rod cooperates with the nameplate scale for indication.

[0009] Preferably, in the above technical solution, the indicating component includes a compression indicating component, which includes a compression nameplate scale and a compression indicating rod. The compression nameplate scale is connected to the outer surface of the valve cover, one end of the compression indicating rod is connected to the elastic component, and the other end of the compression indicating rod cooperates with the compression nameplate scale for indication. The compression indicating component enables rapid and accurate adjustment of the compression amount of the elastic component.

[0010] More preferably, the valve cover has a first groove extending vertically, and the other end of the compression indicator rod passes through the first groove to cooperate with the compression nameplate scale for indication. The first groove facilitates the vertical movement of the compression indicator rod.

[0011] More preferably, the other end of the compression indicator rod is connected to a compression pointer to facilitate better indication of the reading.

[0012] More preferably, the elastic component includes a lower elastic seat, an upper elastic seat, and an elastic element. The lower elastic seat and the upper elastic seat are sleeved on the valve stem, and the elastic element is connected between the lower elastic seat and the upper elastic seat. A limiting device is provided at the lower part of the valve stem to fix the lower elastic seat, and one end of the compression indicator rod is connected to the upper elastic seat.

[0013] Preferably, in the above technical solution, the indicating component includes an opening indicating component, which includes an opening nameplate scale, an opening indicating rod, and an opening pointer. The opening nameplate scale is connected to the outer surface of the protective cover. One end of the opening indicating rod is connected to a valve stem located inside the protective cover. The opening pointer is movably connected to the opening nameplate scale. The other end of the opening indicating rod is located below the opening pointer. The opening indicating rod can only move the opening pointer upwards. The opening indicating component can be used to determine whether the valve is open or to indicate the specific opening height.

[0014] More preferably, the activation pointer is configured such that when the activation indicator rod moves upward, it can move the activation pointer upward together, and when the activation indicator rod moves downward, the activation pointer remains stationary.

[0015] More preferably, the protective cover has a second groove extending vertically, and the other end of the opening indicator rod passes through the second groove to below the opening pointer, so that the opening indicator rod can be moved up and down easily through the second groove.

[0016] Preferably, in the above technical solution, the indicator rod is threadedly connected to the elastic component and / or the valve stem.

[0017] Preferably, in the above technical solution, the indicator component further includes a transparent cover that covers the other end of the nameplate scale and indicator rod to prevent human error from adjusting the indicator rod.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] 1. The elastic compression amount of the safety valve is visualized, which can accurately determine whether the elastic compression amount meets the standard;

[0020] 2. The safety valve can accurately and quickly adjust the set pressure of the safety valve, reducing the risk of wear on the sealing surface;

[0021] 3. It can be visually determined whether the safety valve has been opened and whether the opening height meets the standard requirements;

[0022] 4. The safety valve has a simple and reliable overall structure and good economic efficiency. Attached Figure Description

[0023] Appendix Figure 1 This is a cross-sectional schematic diagram of the safety valve of this utility model;

[0024] Appendix Figure 2 This is a schematic diagram of the compression indicator component in this utility model;

[0025] Appendix Figure 3 This is a schematic diagram of the activation indicator component in this utility model.

[0026] In the attached diagrams above:

[0027] 10. Valve body; 11. Valve seat; 12. Valve inlet; 13. Valve outlet;

[0028] 20. Guide sleeve; 21. Backflush disc; 22. Valve disc;

[0029] 3. Valve cover; 30. First tank body;

[0030] 4. Valve stem;

[0031] 50. Lower elastic seat; 51. Upper elastic seat; 52. Elastic element;

[0032] 70. Adjust the screw; 71. Tighten the nut;

[0033] 8. Protective cover; 80. Second tank;

[0034] 900, Compression nameplate scale; 9000, Scale; 9001, Oblong hole; 901, Compression indicator rod; 902, Compression pointer;

[0035] 910. Open the nameplate scale; 9100. Scale; 9101. Oblong hole; 911. Open the indicator rod; 912. Open the pointer. Detailed Implementation

[0036] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] like Figure 1 The safety valve shown includes a valve body, a valve disc assembly, a valve cover 3, a valve stem 4, a resilient assembly, an adjusting assembly, and a protective cover. Specifically:

[0039] The valve body includes a valve body 10 and a valve seat 11. The valve seat 11 is mounted on the valve body 10. The openings of the valve body 10 and the valve seat 11 overlap to form a valve inlet 12. The outlet of the valve seat 11 is connected to the outlet of the valve body 10, and the outlet of the valve body 10 forms a valve outlet 13.

[0040] The valve disc assembly includes a guide sleeve 20, a backflush disc 21, and a valve disc 22. The guide sleeve 20 is fixed on the valve body 10. The backflush disc 21 is disposed inside the guide sleeve 20 and can move under the guidance of the guide sleeve 20. The valve disc 22 is connected to the backflush disc 21 and covers the valve inlet 12 to close it during normal operation (the outlet of the valve seat 11).

[0041] The valve cover 3 is placed on the valve body 10. In the figure, the guide sleeve 20 is fixed between the valve body 10 and the valve cover 3.

[0042] The valve stem 4 is located inside the valve cover 3. The lower end of the valve stem 4 cooperates with the valve disc assembly. In the figure, the lower end of the valve stem 4 abuts against the backwash plate 21, and the upper end of the valve stem 4 protrudes out of the valve cover 3.

[0043] The elastic component is housed within the valve cover 3. This component provides the valve stem 4 with an elastic force that causes the valve disc assembly to close the valve body 10. The elastic component includes a lower elastic seat 50, an upper elastic seat 51, and an elastic element 52. The lower and upper elastic seats 50 and 51 are fitted onto the valve stem 4, and the elastic element 52 connects the lower and upper elastic seats 50 and 51. The elastic element 52 can be, for example, a spring. A limiting device is provided at the lower part of the valve stem 4 to fix the lower elastic seat 50.

[0044] The adjusting assembly includes an adjusting screw 70 and a locking nut 71. The adjusting screw 70 is sleeved on the valve stem 4 and threadedly connected to the valve cover 3. The lower end of the adjusting screw 70 extends into the valve cover 3 and abuts against the top of the upper elastic seat 51. The locking nut 71 is screwed onto the adjusting screw 70 to lock the adjusting screw 70 relative to the valve cover 3. During adjustment, by rotating the adjusting screw 70, the threaded connection between the adjusting screw 70 and the valve cover 3 allows the adjusting screw 70 to move up and down relative to the valve cover 3, thereby adjusting the distance between the lower elastic seat 50 and the upper elastic seat 51, thus adjusting the set pressure for valve opening. After adjusting the adjusting screw 70, the locking nut 71 is tightened.

[0045] The protective cover 8 is placed on top of the valve cover 3, covering the upper end of the valve stem 4, the adjusting screw 70, and the locking nut 71.

[0046] In this embodiment: the safety valve further includes an indicating component, which includes a nameplate scale and an indicating rod. The nameplate scale is connected to the outer surface of the valve cover 3 and / or the outer surface of the protective cover 8. One end of the indicating rod is connected to the elastic component and / or the valve stem 4, and the other end of the indicating rod cooperates with the nameplate scale for indication. The indicating component includes a compression indicating component and an opening indicating component. Specifically:

[0047] like Figure 2 As shown: The compression indicator assembly includes a compression nameplate scale 900 and a compression indicator rod 901. Wherein:

[0048] The compression nameplate scale 900 is connected to the outer surface of the valve cover 3, such as by rivets. The compression nameplate scale 900 is printed with a scale 9000. An elongated hole 9001 is provided on one side of the scale 9000. The compression indicator rod 901 can pass through the elongated hole 9001 and move up and down in the elongated hole 9001.

[0049] One end of the compression indicator rod 901 is connected to the upper elastic seat 51, such as by a threaded connection. The other end of the compression indicator rod 901 passes through the elongated hole 9001 and cooperates with the compression nameplate scale 900 for indication. In this embodiment, the other end of the compression indicator rod 901 is connected to a compression pointer 902. In the figure, the compression pointer 902 extends in the left and right direction to facilitate better indication of the reading.

[0050] The valve cover 3 has a first groove 30 extending vertically. The first groove 30 corresponds to the elongated hole 9001 of the compression nameplate scale 900. The other end of the compression indicator rod 301 passes through the first groove 30 and cooperates with the compression nameplate scale 900 for indication.

[0051] like Figure 3 As shown: The opening indicator assembly includes an opening nameplate scale 910, an opening indicator lever 911, and an opening pointer 912. Wherein:

[0052] The nameplate scale 910 is connected to the outer surface of the protective cover 8, such as by rivets. The nameplate scale 910 is printed with a scale 9100. An elongated hole 9101 is provided on one side of the scale 9100. The compression indicator rod 911 can pass through the elongated hole 9101 and move up and down in the elongated hole 9101. The scale 9100 is printed on both sides of the elongated hole 9101 in the figure.

[0053] One end of the opening indicator 911 is connected to the valve stem 4 (the part of the valve stem 4 that protrudes from the adjusting screw 70) located inside the protective cover 8. If connected by thread, the other end of the opening indicator 911 passes through the elongated hole 9001 to the bottom of the opening pointer 912.

[0054] The opening pointer 912 is movably connected to the opening nameplate scale 910. In the illustration, the opening pointer 912 extends in the left-right direction. In this embodiment, the opening pointer 912 is configured such that when the opening indicator lever 911 moves upward, it moves upward along with the opening pointer 912; when the opening indicator lever 911 moves downward, the opening pointer 912 remains stationary. That is, the opening indicator lever 911 can only move the opening pointer 912 upward. The opening pointer 912 can be implemented as a damped pointer, for example.

[0055] The protective cover 8 has a second groove 80 extending vertically. The second groove 80 corresponds to the elongated hole 9101 of the opening nameplate scale 910. The other end of the opening indicator rod 911 passes through the second groove 80 to below the opening pointer 912.

[0056] In addition, the indicator assembly also includes a transparent cover that covers the other end of the nameplate scale and indicator rod. To prevent human error from adjusting the indicator rod, the transparent cover can be made of glass or resin.

[0057] When assembling the safety valve: Before adjusting the compression of the elastic element 52, first install the compression nameplate scale 900, compression indicator rod 901, and compression pointer 902 to the set position. By rotating the adjusting screw 70, compress the elastic element 52 to the set position, and then confirm the set pressure. If the set pressure is inaccurate, the required adjustment amount can be calculated by measuring the stiffness of the elastic element 52, and the adjustment can be indicated by rotating the adjusting screw 70 and the compression pointer 902. After the safety valve performance is adjusted and the protective cover 8 and other parts are assembled, install the opening indicator rod 911 to the set position of the valve stem 4, and then fix the opening nameplate scale 910 on the protective cover 8. At this time, the opening pointer 912 is positioned at 0 (0 mark).

[0058] During normal operation of the safety valve, the compression of the elastic element 52 can be determined by the compression scale 900 on the nameplate, thereby determining whether the adjusting screw 70 is loose. Since the opening pointer 912 is a damped pointer, it will not automatically fall back after the valve is opened due to the damping effect. Therefore, the position indicated by the opening pointer 912 can be used to determine whether the safety valve has been opened and what the opening height is. After the inspector confirms, the opening pointer 912 is returned to the 0 position.

[0059] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A safety valve with an indicating function, comprising a valve body, a valve disc assembly, a valve cover, a valve stem, an elastic component, an adjusting component, and a protective cover, wherein the valve disc assembly cooperates with the valve body to close the valve body, the valve cover is disposed on the valve body, the valve stem is disposed within the valve cover, the lower end of the valve stem cooperates with the valve disc assembly, the elastic component is disposed within the valve cover to provide an elastic force for the valve stem to move and drive the valve disc assembly to close the valve body, the adjusting component is connected to the valve stem for adjusting the set pressure for valve opening, and the protective cover is disposed on the valve cover, characterized in that: The safety valve further includes an indicating component, which includes a nameplate scale and an indicating rod. The nameplate scale is connected to the outer surface of the valve cover and / or the outer surface of the protective cover. One end of the indicating rod is connected to the elastic component and / or the valve stem, and the other end of the indicating rod cooperates with the nameplate scale for indication.

2. The safety valve with indication function according to claim 1, characterized in that: The indicated component includes a compression indicated component, which includes a compression nameplate scale and a compression indicated rod. The compression nameplate scale is connected to the outer surface of the valve cover, one end of the compression indicated rod is connected to the elastic component, and the other end of the compression indicated rod cooperates with the compression nameplate scale for indication.

3. The safety valve with indicating function according to claim 2, characterized in that: The valve cover has a first groove extending vertically, and the other end of the compression indicator rod passes through the first groove to cooperate with the compression nameplate scale for indication.

4. The safety valve with indicating function according to claim 2, characterized in that: The other end of the compression indicator rod is connected to a compression pointer.

5. The safety valve with indicating function according to claim 2, characterized in that: The elastic component includes a lower elastic seat, an upper elastic seat, and an elastic element. The lower and upper elastic seats are sleeved on the valve stem, and the elastic element is connected between the lower and upper elastic seats. A limiter is provided at the lower part of the valve stem to fix the lower elastic seat, and one end of the compression indicator rod is connected to the upper elastic seat.

6. The safety valve with indicating function according to claim 1, characterized in that: The indicator assembly includes an opening indicator assembly, which includes an opening nameplate scale, an opening indicator rod, and an opening pointer. The opening nameplate scale is connected to the outer surface of the protective cover. One end of the opening indicator rod is connected to a valve stem located inside the protective cover. The opening pointer is movably connected to the opening nameplate scale. The other end of the opening indicator rod is located below the opening pointer. The opening indicator rod can only move the opening pointer upwards.

7. The safety valve with indicating function according to claim 6, characterized in that: The activation pointer is configured such that when the activation indicator rod moves upward, it can move the activation pointer upward as well, and when the activation indicator rod moves downward, the activation pointer remains stationary.

8. The safety valve with indicating function according to claim 6, characterized in that: The protective cover has a second groove extending vertically, and the other end of the opening indicator rod passes through the second groove to below the opening pointer.

9. The safety valve with indicating function according to claim 1, characterized in that: The indicator rod is threaded onto the elastic component and / or the valve stem.

10. The safety valve with indicating function according to claim 1, characterized in that: The indicator assembly also includes a transparent cover that covers the other end of the nameplate scale and indicator rod.

Images