Throttle outer sleeve sealing structure

Abstract

The utility model discloses throttle valve outer slide sleeve sealing structure, including outer slide sleeve, valve cover, disc spring, packing ring no.

Description

Technical Field

[0001] This utility model relates to a throttle valve, specifically to a throttle valve outer sliding sleeve sealing structure. Background Technology

[0002] Throttling valves, as a type of control valve, are widely used in various industries such as petroleum, natural gas, chemical, and oil refining due to their wide flow regulation range, high throttling accuracy, and low pressure loss. However, in practical applications, such as special working conditions requiring corrosion resistance, heat resistance, or cold resistance, PTFE material is often chosen as the sealing element. But PTFE is a plastic with poor wear resistance. In the practical application of external sliding sleeve throttling valves, we have found that the PTFE seals are prone to wear after a period of valve operation, affecting the valve's sealing effect. Regular replacement of the PTFE seals is necessary to ensure continued normal valve operation, which wastes considerable manpower and resources. Therefore, we propose an external sliding sleeve sealing structure for throttling valves. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an external sliding sleeve sealing structure for throttle valves. This solves the problem that in practical applications of external sliding sleeve throttle valves, the PTFE seals are easily worn after a period of opening and closing, which affects the valve's sealing effect. Regular replacement of the PTFE seals is necessary to ensure the valve continues to function normally, which wastes a lot of manpower and resources.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a throttle valve outer sliding sleeve sealing structure, including an outer sliding sleeve, a valve cover, a disc spring, a first packing ring, a PTFE packing group, graphite packing, a second packing ring, and a fourth open ring. The outer sliding sleeve is movably installed inside the valve cover. The disc spring, the first packing ring, the PTFE packing group, the graphite packing, the second packing ring, and the fourth open ring are installed sequentially from top to bottom between the outer sliding sleeve and the inner wall of the valve cover.

[0005] Based on the above scheme, the valve cover and the outer sliding sleeve are in sliding fit.

[0006] Based on the above scheme, the PTFE packing assembly consists of multiple V-shaped polytetrafluoroethylene sealing rings.

[0007] Based on the above scheme, the graphite filler is made of graphite material.

[0008] Compared with the prior art, the advantages of this utility model are: the external sliding sleeve sealing structure of the throttle valve is very convenient to install and disassemble, which can not only ensure the sealing performance of the packing, but also reduce the valve torque by a lot, effectively improve the service life of the valve, and eliminate the need to replace the PTFE packing regularly, thereby improving the maintenance cost and efficiency of the valve, enhancing market competitiveness, and reducing the waste of manpower and material resources. This utility model has a simple and reasonable structure, low manufacturing cost, and strong practicality. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the sealing structure of the outer sliding sleeve of the throttle valve of this utility model;

[0010] Figure 2 This is a partial structural diagram of point A of the sealing structure of the outer sliding sleeve of the throttle valve of this utility model.

[0011] The numbers in the diagram are: 1-outer sliding sleeve, 2-valve cover, 3-disc spring, 4-packing ring one, 5-PTFE packing group, 6-graphite packing, 7-packing ring two, 8-four-open ring. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0014] Reference Figures 1 to 2 It can be seen that the outer sliding sleeve sealing structure of the throttle valve includes an outer sliding sleeve 1, a valve cover 2, a disc spring 3, a first packing ring 4, a PTFE packing assembly 5, a graphite packing 6, a second packing ring 7, and a four-ring 8. The outer sliding sleeve 1 is movably installed inside the valve cover 2. The disc spring 3, the first packing ring 4, the PTFE packing assembly 5, the graphite packing 6, the second packing ring 7, and the four-ring 8 are installed sequentially from top to bottom between the outer sliding sleeve 1 and the inner wall of the valve cover 2. The four-ring 8 can press the disc spring 3, the first packing ring 4, the PTFE packing assembly 5, the graphite packing 6, and the second packing ring 7 into the stuffing box of the valve cover.

[0015] The valve cover 2 is slidably fitted with the outer sliding sleeve 1, which facilitates installation, disassembly and use; the PTFE packing group 5 is composed of multiple V-shaped polytetrafluoroethylene sealing rings, which have compressible properties, can store force and have better sealing performance; the graphite packing 6 is made of graphite material, which has good sealing performance and wear resistance.

[0016] The principle and advantages of this utility model: The throttle valve outer sliding sleeve sealing structure involves sequentially installing the disc spring 3, packing ring 4, PTFE packing assembly 5, graphite packing 6, and packing ring 7 into the packing cavity of the valve cover 2. The four-opening ring 8 is then used to press the components together until it fits into the groove of the valve cover 2. Finally, the outer sliding sleeve 1 is inserted from the bottom of the valve cover 2, slowly passing through the bottom of the packing cavity. The disc spring 3, packing ring 1, and packing ring 2 are added to the packing cavity at the outer sliding sleeve 1 of the throttle valve. The disc spring 3 is initially compressed during valve installation. After a period of use, the PTFE packing assembly 5 wears and loosens. The disc spring 3 automatically releases its force, allowing the PTFE packing assembly 5 to be compressed again to achieve the pre-tightening force for sealing. This eliminates the need for periodic replacement of the PTFE seals. This utility model has a simple and reasonable structure, low manufacturing cost, and is suitable for widespread use.

[0017] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A throttle valve outer sliding sleeve sealing structure, comprising an outer sliding sleeve (1), a valve cover (2), a disc spring (3), a first packing ring (4), a PTFE packing assembly (5), graphite packing (6), a second packing ring (7), and a four-open ring (8), characterized in that: An outer sliding sleeve (1) is movably installed inside the valve cover (2). A disc spring (3), a first packing ring (4), a PTFE packing group (5), a graphite packing (6), a second packing ring (7), and a four-open ring (8) are installed between the outer sliding sleeve (1) and the inner wall of the valve cover (2) from top to bottom.

2. The throttle valve outer sliding sleeve sealing structure according to claim 1, characterized in that, The valve cover (2) is in sliding fit with the outer sliding sleeve (1).

3. The throttle valve outer sliding sleeve sealing structure according to claim 1, characterized in that, The PTFE packing assembly (5) consists of multiple V-shaped polytetrafluoroethylene sealing rings.

4. The throttle valve outer sliding sleeve sealing structure according to claim 1, characterized in that, The graphite filler (6) is made of graphite material.

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