Natural gas station low-temperature stop valve
By introducing a power-assisted rotating assembly and thermal conduction mechanism into the low-temperature shut-off valve, the problem of inflexible valve operation in low-temperature environments is solved, and the valve is opened and adjusted easily under low-temperature conditions is achieved, ensuring the normal operation of the system.
Patent Information
- Application Number
- CN202421014205.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The existing low-temperature shut-off valves at natural gas stations are affected by the solidification of lubricant or the increase in viscosity and the thermal expansion and contraction of internal parts of the valve under low temperature environments, resulting in the operating performance of the valve being inflexible, which may cause the valve stem to be stuck. Difficult to open and close with handwheel.
A low-temperature shut-off valve including a power-assisted rotating assembly and a thermal conduction mechanism is designed. The power-assisted rotating assembly consists of a cross rod, a rotating ball, a push rod and a handle. The thermal conduction mechanism uses an insulating column, a conductive sheet, an elastic connecting sheet and an electric heating rod. It conducts thermal conduction and assists in rotating under low temperature environments to ensure normal operation of the valve.
Through the design of the power-assisted rotating assembly and thermal conduction mechanism, the problem of inflexible valve operation in low temperature environments is solved, and the valve is opened and adjusted easily under low temperature conditions is achieved, avoiding the occlusion caused by the freezing of valve components.
Smart Images
Figure CN222277642U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of natural gas low-temperature stop valves, in particular to a natural gas station low-temperature stop valve. Background Art
[0002] Cryogenic globe valve is a valve device used to control the flow of fluid media in low temperature environment. It is mainly used in cryogenic process systems, such as liquefied natural gas processing, refrigeration process, cryogenic chemical reaction and other applications to ensure fluid flow control and safe operation of the system.
[0003] However, the existing low-temperature stop valves for natural gas stations have the following problems during use: due to the solidification or increased viscosity of the lubricant caused by low temperature, as well as the thermal expansion and contraction of the internal parts of the valve, the operating performance of the valve may be affected, resulting in the inflexible opening and closing of the valve, the valve stem being stuck, etc., making it difficult for the staff to open and close the valve with the hand wheel. Therefore, it is necessary to design corresponding technical solutions to solve the existing technical problems. Utility Model Content
[0004] The purpose of the utility model is to provide a low-temperature stop valve for a natural gas station, which solves the technical problem that the operating performance of the valve may be affected due to the solidification or increased viscosity of the lubricant caused by low temperature, as well as the thermal expansion and contraction of the internal parts of the valve, which may lead to the inflexible opening and closing of the valve and the jamming of the valve stem, making it difficult for the staff to open and close the valve with a hand wheel.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-temperature stop valve for a natural gas station, comprising a stop valve body and a mounting plate installed in the middle of the stop valve body, a driving rod is longitudinally inserted in the mounting plate, a hand wheel is connected to the upper end of the driving rod, a power-assisted rotating assembly is fixed to one side of the driving rod, the power-assisted rotating assembly comprises a cross bar, a rotating ball, a push rod and a handle, the inner end of the cross bar is connected to the driving rod and the outer end is rotatably connected to the rotating ball, a through hole is opened in the middle of the rotating ball, the push rod is longitudinally inserted in the through hole, the handle is fixed to the upper end of the push rod, a plurality of groups of abutment blocks are evenly fixed on the surface of the mounting plate, and the plurality of groups of abutment blocks are distributed in a ring shape, a socket is opened on the top of the driving rod and a guide groove is opened inside, a heat conduction mechanism is arranged in the socket and the guide groove, the heat conduction mechanism comprises an opening and closing regulator arranged in the socket and an electric heating rod fixed in the guide groove, and a metal heat conduction column is connected to the lower end of the electric heating rod.
[0006] As a preferred embodiment of the utility model, the opening and closing regulator includes an insulating column, a conductive sheet 1, a conductive sheet 2, an elastic connecting sheet and a contact plate. The insulating column is inserted into the socket, the conductive sheet 1 and the conductive sheet 2 are symmetrically arranged on both sides of the insulating column and connected to the inner wall of the socket, the elastic connecting sheet is fixed to the outer side of the conductive sheet 1, and the contact plate is fixed to the lower end of the conductive sheet 2 and contacts the electric heating rod.
[0007] As a preferred embodiment of the present invention, the insulating column is made of insulating material and has a truncated cone structure, and the diameter of the upper end of the insulating column is smaller than the diameter of the lower end.
[0008] As a preferred embodiment of the present invention, the conductive sheet 1 and the conductive sheet 2 are both in an arc-shaped structure and a contact head is fixed at one end of both, wherein the conductive sheet 1 is externally connected to a circuit.
[0009] As a preferred embodiment of the utility model, the elastic connecting piece is made of rubber material and has a plurality of groups of extrusion grooves formed on its surface, and the plurality of groups of extrusion grooves are distributed in a stacked manner.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] 1. This scheme improves the existing low-temperature stop valve structure and is equipped with a power-assisted rotation component on the valve. When the valve needs to be rotated, the staff can use the power-assisted rotation component to assist in opening the handwheel of the valve. In addition, a heat-conducting mechanism is provided on the handwheel rod to deal with the freezing of the internal parts of the valve at the lower end of the handwheel rod, thereby facilitating the rotation and adjustment of the valve.
[0012] 2. The low-temperature stop valve structure designed in this scheme can conduct heat and assist rotation when the valve is blocked in a low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is the overall structure diagram of the utility model;
[0014] Figure 2 This is the internal structure diagram of the driving rod of the utility model;
[0015] Figure 3 This is a structural diagram of the opening and closing regulator described in the utility model.
[0016] In the figure: 1. stop valve body; 2. mounting plate; 3. drive rod; 4. hand wheel; 5. cross bar; 6. rotating ball; 7. push rod; 8. handle; 9. through-hole; 10. resistance block; 11. socket; 12. guide groove; 13. opening and closing regulator; 14. electric heating rod; 15. metal heat-conducting column; 16. insulating column; 17. conductive sheet 1; 18. conductive sheet 2; 19. elastic connecting sheet; 20. contact plate; 21. contact head; 22. extrusion groove. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.
[0018] See also Figure 1-3 The utility model provides a technical solution: a low-temperature stop valve for a natural gas station, comprising a stop valve body 1 and a mounting plate 2 installed in the middle of the stop valve body 1, a driving rod 3 is longitudinally inserted in the mounting plate 2, a hand wheel 4 is connected to the upper end of the driving rod 3, a power-assisted rotating assembly is fixed to one side of the driving rod 3, the power-assisted rotating assembly comprises a cross bar 5, a rotating ball 6, a push rod 7 and a handle 8, the inner end of the cross bar 5 is connected to the driving rod 3 and the outer end is rotatably connected to the rotating ball 6, and a through hole 9 is opened in the middle of the rotating ball 6, The push rod 7 is longitudinally inserted into the through opening 9, the handle 8 is fixed to the upper end of the push rod 7, and a plurality of groups of abutment blocks 10 are evenly fixed on the surface of the mounting plate 2, and the plurality of groups of abutment blocks 10 are distributed in a ring shape. A socket 11 is provided on the top of the driving rod 3 and a guide groove 12 is provided inside. A heat conduction mechanism is provided in the socket 11 and the guide groove 12. The heat conduction mechanism includes an opening and closing regulator 13 provided in the socket 11 and an electric heating rod 14 fixed in the guide groove 12, and a metal heat conduction column 15 is connected to the lower end of the electric heating rod 14.
[0019] Further improvement, such as Figure 3 As shown: the opening and closing regulator 13 includes an insulating column 16, a conductive sheet 1 17, a conductive sheet 2 18, an elastic connecting sheet 19 and a contact plate 20. The insulating column 16 is inserted into the socket 11, the conductive sheet 1 17 and the conductive sheet 2 18 are symmetrically arranged on both sides of the insulating column 16 and connected to the inner wall of the socket 11, the elastic connecting sheet 19 is fixed to the outer side of the conductive sheet 17, the contact plate 20 is fixed to the lower end of the conductive sheet 2 18 and contacts with the electric heating rod 14, and the contact heads 21 on the conductive sheet 17 and the conductive sheet 2 18 can achieve the purpose of conduction when they are in contact.
[0020] Further improvement, such as Figure 2As shown: the insulating column 16 is made of insulating material and has a truncated cone structure. The diameter of the upper end of the insulating column 16 is smaller than the diameter of the lower end, and is used to separate the conductive sheet 1 17 and the conductive sheet 2 18.
[0021] Further improvement, such as Figure 2 As shown: the conductive sheet 1 17 and the conductive sheet 2 18 are both in an arc-shaped structure and a contact head 21 is fixed at one end of both, wherein the conductive sheet 1 17 is externally connected to a circuit, and the two groups of contact heads 21 are in contact, so as to achieve the purpose of conduction.
[0022] Specifically, the elastic connecting sheet 19 is made of rubber material and has a plurality of groups of extrusion grooves 22 formed on its surface. The plurality of groups of extrusion grooves 22 are distributed in a stacked manner. Such a design can push the conductive sheet 17 to move inward.
[0023] During use: When the lower end of the driving rod 3 of the utility model is frozen and blocked, the staff can pull out the insulating column 16, and the insulating column 16 is separated from the socket 11. The elastic connecting piece 19 pushes the conductive sheet 17 inward so that the contact heads 21 on the conductive sheet 17 and the conductive sheet 2 18 are in contact with each other, thereby achieving the purpose of conduction. The current is conducted to the electric heating rod 14, and the electric heating rod 14 is energized to heat and generate heat. The heat is transferred to the metal heat-conducting column 15 to achieve the purpose of hot-melting the frozen part of the lower end of the driving rod 3. At the same time, one staff member holds the handwheel 4 and rotates it, and the other staff member can hold the handle 8 and rotate the push rod 7, so that the push rod 7 acts on the resistance block 10, and the reaction to drive the driving rod 3 to rotate can achieve the purpose of assisting the driving rod 3 and the handwheel 4 to rotate.
[0024] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0025] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.
[0026] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A low-temperature stop valve for a natural gas station, comprising a stop valve body (1) and a mounting plate (2) mounted in the middle of the stop valve body (1), a drive rod (3) longitudinally inserted into the mounting plate (2), and a hand wheel (4) connected to the upper end of the drive rod (3), characterized in that: A power-assisted rotating assembly is fixed on one side of the driving rod (3), and the power-assisted rotating assembly comprises a cross rod (5), a rotating ball (6), a push rod (7) and a handle (8). The inner end of the cross rod (5) is connected to the driving rod (3) and the outer end is rotatably connected to the rotating ball (6). A through hole (9) is opened in the middle of the rotating ball (6), and the push rod (7) is longitudinally inserted into the through hole (9). The handle (8) is fixed to the upper end of the push rod (7). The surface of the mounting plate (2) is evenly fixed. There are a plurality of groups of abutment blocks (10), which are distributed in a ring shape. A socket (11) is provided at the top of the driving rod (3) and a guide groove (12) is provided inside. A heat conduction mechanism is provided in the socket (11) and the guide groove (12). The heat conduction mechanism comprises an opening and closing regulator (13) provided in the socket (11) and an electric heating rod (14) fixed in the guide groove (12). The lower end of the electric heating rod (14) is connected to a metal heat conduction column (15).
2. A natural gas station low temperature stop valve according to claim 1, characterized in that: The opening and closing regulator (13) comprises an insulating column (16), a conductive sheet 1 (17), a conductive sheet 2 (18), an elastic connecting sheet (19) and a contact plate (20); the insulating column (16) is inserted into the socket (11); the conductive sheet 1 (17) and the conductive sheet 2 (18) are symmetrically arranged on both sides of the insulating column (16) and connected to the inner wall of the socket (11); the elastic connecting sheet (19) is fixed to the outer side of the conductive sheet 1 (17); and the contact plate (20) is fixed to the lower end of the conductive sheet 2 (18) and contacts the electric heating rod (14).
3. A natural gas station low temperature stop valve according to claim 2, characterized in that: The insulating column (16) is made of insulating material and has a truncated cone structure; the diameter of the upper end of the insulating column (16) is smaller than the diameter of the lower end.
4. A natural gas station low temperature stop valve according to claim 2, characterized in that: The conductive sheet 1 (17) and the conductive sheet 2 (18) are both in an arc-shaped structure and a contact head (21) is fixed at one end of both, wherein the conductive sheet 1 (17) is externally connected to a circuit.
5. A natural gas station low temperature stop valve according to claim 2, characterized in that: The elastic connecting piece (19) is made of rubber material and has a plurality of groups of extrusion grooves (22) formed on its surface, wherein the plurality of groups of extrusion grooves (22) are distributed in a stacked manner.