Safety valve with limiting device

Abstract

The utility model provides a safety valve with a limiting device. The safety valve with the limiting device comprises a connector; the threaded sleeve is installed at the position, located at the top, in the connector, the valve element sleeve is installed at the position, close to the bottom end, in the threaded sleeve, the valve element is installed in the valve element sleeve, the rectangular sealing ring is arranged at the top end of the valve element sleeve, and the ejector rod sleeve is installed at the position, close to the top end, in the threaded sleeve. An ejector rod is mounted in the ejector rod sleeve; and the valve shell is installed at the position, close to the top end, of the outer surface of the threaded sleeve, a spring seat is installed at the position, close to the bottom end, of the interior of the valve shell, a spring is installed at the top of the spring seat, and the top of the inner wall of the valve shell is in threaded connection with an adjusting screw. According to the safety valve with the limiting device, through the design, the moving stability of the valve element in the valve shell is improved, and impact on the valve element when the safety valve works is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a safety valve with a limiting device. Background Art

[0002] A safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium outside the system.

[0003] The main structural components of the safety valve include valve body, valve cover, valve spring, guide device, adjusting ring, sealing surface and other parts. Their different structures and designs will directly affect the performance and working effect of the safety valve.

[0004] However, the traditional safety valve lacks a built-in limit device, which causes the safety valve to be impacted during use and easily shake, thereby causing internal damage to the safety valve and reducing the reciprocating performance of the valve core.

[0005] Therefore, it is necessary to provide a safety valve with a limit device to solve the above technical problems. Utility Model Content

[0006] The utility model provides a safety valve with a limit device, which solves the problem that the traditional safety valve lacks a built-in limit device, causing the safety valve to shake easily when impacted during use, thereby causing internal damage to the safety valve and reducing the reciprocating performance of the valve core.

[0007] In order to solve the above technical problems, the safety valve with a limit device provided by the utility model comprises: a connector;

[0008] A screw sleeve, the screw sleeve is installed at the top position inside the joint, a valve core sleeve is installed near the bottom end inside the screw sleeve, a valve core is installed inside the valve core sleeve, a rectangular sealing ring is arranged at the top end of the valve core sleeve, a push rod sleeve is installed near the top end inside the screw sleeve, and a push rod is installed inside the push rod sleeve;

[0009] A valve housing, wherein the valve housing is mounted on the outer surface of the screw sleeve near the top end, a spring seat is mounted on the inner portion of the valve housing near the bottom end, a spring is mounted on the top of the spring seat, and an adjusting screw is threadedly connected to the top of the inner wall of the valve housing;

[0010] The screw sleeve is installed from the top of the joint. The diameter of the inner surface of the screw sleeve at the bottom and top is different. Please refer to Figure 4 , the position reference of the rectangular sealing ring Figure 4 The bottom end of the spring seat contacts the top end of the screw sleeve, the bottom end of the adjusting screw is connected to the other end of the spring, and a thread is provided on the inner surface of the valve housing near the upper part to facilitate the adjustment of the position of the adjusting screw.

[0011] Preferably, the bottom end of the screw sleeve is fixedly connected with a mounting pipe, and the bottom end of the mounting pipe is mounted with a second flange;

[0012] The installation pipe and the joint are connected, and the second flange is convenient for installing the safety valve.

[0013] Preferably, a connecting pipe is installed on the outer surface of the installation pipe, and the other end of the connecting pipe is fixedly connected to a first flange;

[0014] The connecting pipe and the installation pipe are interconnected.

[0015] Preferably, the outer surface of the screw sleeve is provided with a mounting groove, a circular sealing ring is installed inside the mounting groove, and the outer surface of the screw sleeve is provided with a clamping groove;

[0016] The circular sealing ring is located inside the joint.

[0017] Preferably, a mounting ring is provided on the outer surface of the joint, and bolts are threadedly connected on opposite sides of the outer surface of the mounting ring;

[0018] The mounting ring may be mounted on the outer surface of the fitting while the bolt is in contact with the outer surface of the fitting.

[0019] Preferably, a protective sleeve is fixedly connected to the top of the mounting ring, and an air hole is provided on the outer surface of the protective sleeve;

[0020] The air vents can play a certain role in preventing dust, and the protective cover can play a certain role in protecting the valve housing.

[0021] Compared with the related art, the safety valve with a limit device provided by the utility model has the following beneficial effects:

[0022] The utility model provides a safety valve with a limiting device. In order to increase the stability of the safety valve during operation and reduce damage to the valve core, the valve core is first installed in the interior of the screw sleeve through the valve core sleeve, and then the push rod is installed in the inner wall of the screw sleeve through the push rod sleeve, and the screw sleeve is installed in the interior of the valve shell and connected with a spring seat with a spring, and then it is only necessary to install the screw sleeve with a circular sealing ring in the interior of the joint. A limiting device is built-in inside the screw sleeve, which is nested inside to avoid valve core vibration. The split structure reduces the price difficulty. The double-end face seal effectively reduces the impact of the safety valve and improves the reciprocating performance of the valve core. The design improves the stability of the valve core in the valve shell and reduces the impact on the valve core when the safety valve is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of a preferred embodiment of a safety valve with a limit device provided by the utility model;

[0024] Figure 2 A structural schematic diagram of a screw sleeve is provided for the utility model;

[0025] Figure 3 A structural schematic diagram of a spring is provided for the utility model;

[0026] Figure 4 Provided for the utility model Figure 3 An enlarged view of point A is shown.

[0027] Numbers in the figure: 1. joint, 2. bolt, 3. mounting ring, 4. protective cover, 5. air vent, 6. first flange, 7. connecting pipe, 8. mounting pipe, 9. second flange, 10. valve housing, 11. screw sleeve, 12. adjusting screw, 13. valve core, 14. spring, 15. valve core sleeve, 16. mounting groove, 17. slot, 18. spring seat, 19. push rod sleeve, 20. rectangular sealing ring, 21. circular sealing ring, 22. push rod. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a safety valve with a limit device provided by the utility model; Figure 2 A structural schematic diagram of a screw sleeve is provided for the utility model; Figure 3 A structural schematic diagram of a spring is provided for the utility model; Figure 4 Provided for the utility model Figure 3 The enlarged view of point A is shown. The safety valve with limit device includes: connector 1;

[0030] A screw sleeve 11, the screw sleeve 11 is installed at the top position inside the joint 1, a valve core sleeve 15 is installed near the bottom end inside the screw sleeve 11, a valve core 13 is installed inside the valve core sleeve 15, a rectangular sealing ring 20 is arranged at the top end of the valve core sleeve 15, a push rod sleeve 19 is installed near the top end inside the screw sleeve 11, and a push rod 22 is installed inside the push rod sleeve 19;

[0031] A valve housing 10, wherein the valve housing 10 is mounted on the outer surface of the screw sleeve 11 near the top end, a spring seat 18 is mounted inside the valve housing 10 near the bottom end, a spring 14 is mounted on the top of the spring seat 18, and an adjusting screw 12 is threadedly connected to the top of the inner wall of the valve housing 10;

[0032] The screw sleeve 11 is installed from the top of the joint 1. The diameters of the inner surface of the screw sleeve 11 at the bottom and top are different. Figure 4 , the position of the rectangular sealing ring 20 is referenced Figure 4 The bottom end of the spring seat 18 contacts the top end of the screw sleeve 11, the bottom end of the adjusting screw 12 is connected to the other end of the spring 14, and a thread is provided on the inner surface of the valve housing 10 near the upper half to facilitate the adjustment of the position of the adjusting screw 12.

[0033] The bottom end of the screw sleeve 11 is fixedly connected with a mounting pipe 8, and the bottom end of the mounting pipe 8 is mounted with a second flange 9;

[0034] The installation pipe 8 and the joint 1 are connected, and the second flange 9 is convenient for installing the safety valve.

[0035] A connecting pipe 7 is installed on the outer surface of the installation pipe 8, and the other end of the connecting pipe 7 is fixedly connected to a first flange 6;

[0036] The connecting pipe 7 and the mounting pipe 8 are interconnected, and the connecting pipe 7, the mounting pipe 8 and the joint 1 are made of the same material.

[0037] The outer surface of the screw sleeve 11 is provided with a mounting groove 16, a circular sealing ring 21 is installed inside the mounting groove 16, and the outer surface of the screw sleeve 11 is provided with a clamping groove 17;

[0038] The circular sealing ring 21 is located inside the joint 1 and plays a sealing role.

[0039] The outer surface of the joint 1 is provided with a mounting ring 3, and the opposite side of the outer surface of the mounting ring 3 is threadedly connected with a bolt 2;

[0040] The bolt 2 and the mounting ring 3 are threadedly connected, and the mounting ring 3 can be mounted on the outer surface of the joint 1 when the bolt 2 is in contact with the outer surface of the joint 1 .

[0041] The top of the mounting ring 3 is fixedly connected with a protective sleeve 4, and the outer surface of the protective sleeve 4 is provided with a vent hole 5;

[0042] The air vent 5 can play a certain dust-proof role, and the protective sleeve 4 plays a certain protective role on the valve housing 10.

[0043] The working principle of the safety valve with limit device provided by the utility model is as follows:

[0044] First, install the valve core 13 inside the screw sleeve 11 through the valve core sleeve 15, then install the push rod 22 on the inner wall of the screw sleeve 11 through the push rod sleeve 19, and install the screw sleeve 11 inside the valve housing 10 and dock with the spring seat 18 with the spring 14, then only need to install the screw sleeve 11 with the circular sealing ring 21 inside the joint 1, and build a limit device inside the screw sleeve 11, which is nested inside to avoid the vibration of the valve core 13, split structure, reduce price difficulty, and double-end face sealing effectively reduce the impact of the safety valve and improve the reciprocating performance of the valve core 13.

[0045] Compared with the related art, the safety valve with a limit device provided by the utility model has the following beneficial effects:

[0046] In order to increase the stability of the safety valve during operation and reduce damage to the valve core 13, the valve core 13 is first installed inside the screw sleeve 11 through the valve core sleeve 15, and then the push rod 22 is installed on the inner wall of the screw sleeve 11 through the push rod sleeve 19, and the screw sleeve 11 is installed inside the valve housing 10 and docked with the spring seat 18 with the spring 14. Then, it is only necessary to install the screw sleeve 11 with the circular sealing ring 21 inside the joint 1. A limit device is built into the screw sleeve 11, which is nested inside to avoid vibration of the valve core 13. The split structure reduces the price difficulty. The double-end face seal effectively reduces the impact of the safety valve and improves the reciprocating performance of the valve core 13. The design improves the stability of the valve core 13 in the valve housing 10 and reduces the impact on the valve core 13 when the safety valve is working.

[0047] 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. A safety valve with a limit device, characterized in that: include: Connectors; A screw sleeve, the screw sleeve is installed at the top position inside the joint, a valve core sleeve is installed near the bottom end inside the screw sleeve, a valve core is installed inside the valve core sleeve, a rectangular sealing ring is arranged at the top end of the valve core sleeve, a push rod sleeve is installed near the top end inside the screw sleeve, and a push rod is installed inside the push rod sleeve; A valve housing is installed on the outer surface of the screw sleeve near the top, a spring seat is installed inside the valve housing near the bottom, a spring is installed on the top of the spring seat, and an adjusting screw is threadedly connected to the top of the inner wall of the valve housing.

2. The safety valve with a limit device according to claim 1, characterized in that: The bottom end of the screw sleeve is fixedly connected with a mounting pipe, and the bottom end of the mounting pipe is mounted with a second flange.

3. The safety valve with a limit device according to claim 2, characterized in that: A connecting pipe is installed on the outer surface of the installation pipe, and the other end of the connecting pipe is fixedly connected to a first flange.

4. The safety valve with a limit device according to claim 1, characterized in that: The outer surface of the screw sleeve is provided with a mounting groove, a circular sealing ring is installed inside the mounting groove, and the outer surface of the screw sleeve is provided with a clamping groove.

5. The safety valve with a limit device according to claim 1, characterized in that: The outer surface of the joint is provided with a mounting ring, and the opposite side of the outer surface of the mounting ring is threadedly connected with bolts.

6. The safety valve with a limit device according to claim 5, characterized in that: A protective sleeve is fixedly connected to the top of the mounting ring, and an air hole is provided on the outer surface of the protective sleeve.

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