Ultralow-temperature soft seal stop valve
By adopting the fixed connection between the valve disc and the valve stem and the multi-group tab ring structure in the ultra-low temperature stop valve, the problem of poor sealing performance of the existing ultra-low temperature stop valve is solved, and higher sealing performance and longer use are achieved life.
Patent Information
- Application Number
- CN202421348390.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing ultra-low temperature shut-off valves have poor sealing performance, often leak problems, and have short service life and require frequent repairs.
An ultra-low temperature soft sealed shut-off valve is designed, which uses the valve flap structure to fix the tabs to the valve stem, the conical structure at the bottom end of the valve stem is fixed with the inner groove, and the bottom groove at the bottom end of the valve stem is stuck with the valve body structure. Tongue contact, combined with multiple sets of tab ring structures, reduce contact area and friction, and enhance sealing performance.
It effectively improves sealing performance, reduces media leakage, reduces maintenance frequency and service life, and saves more effort on operation.
Smart Images
Figure CN222502739U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stop valves, in particular to an ultra-low temperature soft-sealed stop valve. Background Art
[0002] The existing stop valve is mainly composed of a valve body, a valve cover, a valve stem, a valve disc, a valve seat and a hand wheel. The hand wheel is turned to drive the valve disc to contact or separate with the valve seat, thereby playing the role of opening or closing.
[0003] At present, in the storage and transportation process of ultra-low temperature media, the sealing is achieved by applying torque to the valve stem, which applies pressure to the valve disc in the axial direction, so that the sealing surface of the valve disc fits tightly with the sealing surface of the valve seat, preventing the media from leaking along the gap between the sealing surfaces;
[0004] However, the stop valves of current ultra-low temperature medium storage devices have poor sealing performance, often leak, and often require maintenance, resulting in a reduced service life. Utility Model Content
[0005] Technical issues solved
[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides an ultra-low temperature soft-sealed stop valve, which can effectively solve the problem of reduced service life of the stop valve in the prior art due to poor sealing performance.
[0007] Technical Solution
[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:
[0009] The utility model provides an ultra-low temperature soft-sealed stop valve, comprising a valve body; a valve cover is fixed on the top of the valve body, a valve stem is arranged on the valve cover and the valve body, the bottom end of the valve stem is fixedly connected to a valve disc, a packing is arranged in the middle of the valve stem, a packing pressing sleeve is arranged on the top of the packing, a hand wheel is fixed on the top of the valve stem, the valve cover is fixedly connected to a packing pressing plate through a nut and a pin shaft, the valve disc comprises a valve disc body, a tongue ring and a protrusion, a top groove is provided on the top of the valve disc body, an inner groove is provided in the middle part, the bottom end of the top groove is communicated with the inner groove, the tongue ring is fixed on the outer side wall of the valve disc body, a bottom groove is provided on the bottom end of the valve disc body, a protrusion is fixed on the middle part of the valve disc body, a bottom ring is arranged on the bottom end of the protrusion, a groove body is provided between the protrusion and the bottom ring to form a bottom groove.
[0010] Furthermore, the bottom ring is a hollow ring structure, and the inner diameter of the bottom ring is smaller than the inner diameter of the bottom groove.
[0011] Furthermore, a plurality of groups of the latch rings are fixed at equal intervals on the outer side of the valve flap body.
[0012] Furthermore, the bottom end of the valve stem is conical, and its size is matched with the inner size of the inner groove.
[0013] Furthermore, the outer sides of each group of the latch rings are arc-shaped rounded structures.
[0014] Furthermore, the valve cover is fixedly connected to the valve body by bolts.
[0015] Beneficial Effects
[0016] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:
[0017] 1. The utility model provides a valve flap structure, which is connected to the valve stem by a tongue-fixed connection. The conical structure at the bottom end of the valve stem can be fixed to the inner groove by a tongue-fixed connection. Then the valve stem is fixed in the top groove, and the bottom groove at the bottom end of the valve flap body can contact the valve body. When the bottom end of the valve stem contacts the valve body through the valve flap, the bottom groove at the bottom end of the valve flap can contact the structure in the valve body by a tongue-fixed connection, and the raised structure can be docked with the groove in the valve body to achieve a closed operation.
[0018] 2. In this device, the tongue ring structure is provided to reduce the contact area with the valve body and thus reduce the friction, making the operation more labor-saving. Multiple groups of tongue ring structures can form a maze-like structure with the trough body, which can reduce the upwelling of the circulating medium through the gap. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0020] Figure 1 It is a schematic diagram of the structure of the utility model;
[0021] Figure 2 It is a structural cross-sectional view of the utility model;
[0022] Figure 3 It is a structural entity diagram of the valve disc in the utility model;
[0023] Figure 4 It is a structural cross-sectional view of the valve disc in the utility model.
[0024] The numbers in the figure represent: 1, valve body; 2, valve cover; 3, bolt; 4, valve stem; 5, packing; 6, packing sleeve; 7, handwheel; 8, nut; 9, valve disc; 91, valve disc body; 92, top groove; 93, tongue ring; 94, inner groove; 95, bottom ring; 96, bottom groove; 97, protrusion. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] The utility model is further described below in conjunction with embodiments.
[0027] Example: Ultra-low temperature soft seal stop valve, refer to the attached Figure 1 -Attached Figure 4 , including a valve body 1; a valve cover 2 is fixed to the top of the valve body 1, a valve stem 4 is arranged in the valve cover 2 and the valve body 1, the bottom end of the valve stem 4 is fixedly connected to the valve disc 9, a packing 5 is arranged in the middle of the valve stem 4, a packing sleeve 6 is arranged at the top of the packing 5, a hand wheel 7 is fixed to the top of the valve stem 4, the valve cover 2 is fixedly connected to the packing pressure plate through a nut 8 and a pin shaft, the valve disc 9 includes a valve disc body 91, a tongue ring 93 and a protrusion 97, a top groove 92 is opened at the top of the valve disc body 91, an inner groove 94 is opened in the middle, the bottom end of the top groove 92 is connected with the inner groove 94, the tongue ring 93 is fixed on the outer side wall of the valve disc body 91, a bottom groove 96 is opened at the bottom end of the valve disc body 91, and PTFE material is embedded in the valve disc body 91. The annular structure can reduce the sealing specific pressure, improve the sealing performance and reduce the operating force.
[0028] A protrusion 97 is fixed to the middle part of the valve flap body 91, and a bottom ring 95 is provided at the bottom end of the protrusion 97. There is a groove body between the protrusion 97 and the bottom ring 95 to form a bottom groove 96; through the provided valve flap 9 structure, the valve flap 9 structure is sleeved and fixedly connected with the valve stem 4, and the conical structure at the bottom end of the valve stem 4 can be fixed with the inner groove 94 by a tongue, and then the valve stem 4 is fixed in the top groove 92, and the bottom groove 96 at the bottom end of the valve flap body 91 can contact with the inside of the valve body 1. When the bottom end of the valve stem 4 contacts with the valve body 1 through the valve flap 9, the bottom groove 96 at the bottom end of the valve flap 9 can contact with the structure in the valve body 1 by a tongue, and the protrusion 97 structure can be docked with the groove in the valve body 1 to achieve a closed operation.
[0029] The bottom ring 95 is a hollow ring structure, and the inner diameter of the bottom ring 95 is smaller than the inner diameter of the bottom groove 96; multiple groups of tongue rings 93 are fixed at equal intervals on the outer side of the valve disc body 91; the bottom end of the valve stem 4 is conical, and its size is adapted to the internal size of the inner groove 94; the outer side of each group of tongue rings 93 is an arc-shaped rounded structure; the valve cover 2 is fixedly connected to the valve body 1 by bolts 3; the tongue ring 93 structure is set to reduce the contact area with the valve body 1 and thus reduce the friction, making the operation more labor-saving, and multiple groups of tongue rings 93 structures can form a maze-like structure with the groove body, which can reduce the upwelling of the circulating medium through the gap.
[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.
Claims
1. Ultra-low temperature soft seal stop valve, characterized in that: The invention comprises a valve body (1); a valve cover (2) is fixed at the top of the valve body (1); a valve stem (4) is arranged inside the valve cover (2) and the valve body (1); the bottom end of the valve stem (4) is connected and fixed to the top end of a valve flap (9); a packing (5) is arranged in the middle of the valve stem (4); a packing sleeve (6) is arranged at the top end of the packing (5); a hand wheel (7) is fixed to the top end of the valve stem (4); the valve cover (2) is fixedly connected to the packing pressure plate via a nut (8) and a pin shaft; the valve flap (9) comprises a valve flap body (91), a tongue ring (93) and A protrusion (97) is provided at the top of the valve flap body (91), and an inner groove (94) is provided in the middle, the bottom end of the top groove (92) is connected to the inner groove (94), the tongue ring (93) is fixed on the outer wall of the valve flap body (91), a bottom groove (96) is provided at the bottom end of the valve flap body (91), a protrusion (97) is fixed in the middle of the valve flap body (91), a bottom ring (95) is provided at the bottom end of the protrusion (97), and a groove body is provided between the protrusion (97) and the bottom ring (95) to form a bottom groove (96).
2. The ultra-low temperature soft-sealed stop valve according to claim 1, characterized in that: The bottom ring (95) is a hollow ring structure, and the inner diameter of the bottom ring (95) is smaller than the inner diameter of the bottom groove (96).
3. The ultra-low temperature soft-sealed stop valve according to claim 1, characterized in that: The latch rings (93) are fixed in multiple groups at equal intervals on the outer side of the valve flap body (91).
4. The ultra-low temperature soft-sealed stop valve according to claim 1, characterized in that: The bottom end of the valve stem (4) is conical, and its size is matched with the inner size of the inner groove (94).
5. The ultra-low temperature soft-sealed stop valve according to claim 4, characterized in that: The outer sides of each group of the latch rings (93) are arc-shaped rounded structures.
6. The ultra-low temperature soft-sealed stop valve according to claim 1, characterized in that: The valve cover (2) is fixedly connected to the valve body (1) via bolts (3).