Pneumatic valve for filling refrigerant cylinders

Abstract

The utility model discloses a pneumatic valve for filling a refrigerant cylinder, comprising a valve body connected to a refrigerant filling pipe through a flange, a fixed plate installed on the top of the valve body, a pneumatic control box arranged above the fixed plate, and a clamping assembly for realizing a detachable connection arranged between the pneumatic control box and the fixed plate. By rotating the stud, the screw sleeve and the arc rod can be driven to move in the axial direction of the stud, and the arc rod drives the L-shaped plate to move synchronously through the transmission member, so that the two L-shaped plates move synchronously toward or away from each other, and when the two L-shaped plates move toward each other, the unlocking operation of the shell and the docking plate can be realized; when the two L-shaped plates move away from each other, the locking operation of the shell and the docking plate can be realized, and the assembly is fast, and there is no need to use a spring, which eliminates the problem of spring fatigue under long-term use, effectively improves the stability of the clamping connection between the shell and the docking plate, and further ensures the installation firmness of the pneumatic control box.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigerant filling, and in particular relates to a pneumatic valve for filling a small refrigerant cylinder. Background Art

[0002] The patent document with announcement number CN208381745U discloses a refrigerant filling and sampling device, including a liquid phase feed pipe, a gas phase balance pipe and a gas phase recovery pipe. One end of the liquid phase feed pipe is a tank liquid phase interface. The liquid phase feed pipe is sequentially installed with a first pipeline, a second pipeline, a pneumatic valve and valve I from the tank liquid phase interface.

[0003] It can be seen from the above scheme that the pneumatic valve is an important component structure in the refrigerant filling process and is a valve that has a quick cut-off function.

[0004] The patent document with publication number CN220228009U discloses a pneumatic shut-off valve, comprising a valve body and a pneumatic control box, flanges are arranged on both sides of the valve body, a connecting pipe is arranged on the top of the valve body, a fixing plate is arranged above the connecting pipe, a vertical pipe is arranged on the upper end surface of the fixing plate, a docking plate is arranged on the top of the vertical pipe, a transmission rod is arranged above the docking plate, a positioning hole is arranged at the middle position of the lower end surface of the pneumatic control box corresponding to the transmission rod, a top block is arranged on the top of the pneumatic control box, a pair of limit plug-ins are arranged on the lower end surface of the pneumatic control box, limit slots are arranged on both sides of the upper end surface of the docking plate corresponding to the limit plug-in, a retractable and adjustable card block is arranged at the bottom position of the outer end surface of the limit plug-in, and the card block is located below the docking plate. By arranging a docking plate on the top of the vertical pipe and arranging a pair of limit plug-ins at the bottom of the pneumatic control box, the limit plug-in plate and the outer card block are used to cooperate with the docking plate for installation and fixing, so that the control box of the pneumatic shut-off valve can be quickly disassembled and assembled for later maintenance and replacement.

[0005] The above scheme realizes the resetting operation of the card block through a spring, but the spring has problems of elastic fatigue and deformation, which makes it difficult to reset the card block after long-term use, thereby reducing the connection stability between the limit plug plate and the docking plate, thereby affecting the installation firmness of the pneumatic control box. Utility Model Content

[0006] The utility model aims to provide a pneumatic valve for filling a small refrigerant cylinder, so as to solve the technical defects of elastic fatigue and deformation of the spring in the existing pneumatic cut-off valve, and reduced stability.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A pneumatic valve for filling small refrigerant cylinders comprises a valve body for filling small refrigerant cylinders, the valve body being connected to a refrigerant filling pipe via a flange, a fixed disk being installed on the top of the valve body, a pneumatic control box being arranged above the fixed disk, and a snap-on assembly for realizing a detachable connection being arranged between the pneumatic control box and the fixed disk.

[0009] The clamping assembly includes a docking plate fixedly connected to the top of the fixed plate, a transmission rod is provided at the center of the top of the docking plate, a shell is movably sleeved on the surface of the transmission rod, the top of the shell is fixedly connected to the bottom of the pneumatic control box, and the bottom of the shell is slidably connected to two L-shaped plates. The transmission rod is provided with a slot for the L-shaped plate to pass through, and the inner cavity of the shell is provided with an adjustment assembly for driving the two L-shaped plates to move synchronously.

[0010] The adjusting component comprises a stud which is rotatably connected to the inner cavity of the shell body, a threaded sleeve is threadedly sleeved on the surface of the stud, and a linking piece is arranged between the threaded sleeve and the L-shaped plate.

[0011] As a preferred solution of the utility model, the linkage includes an arc rod fixedly connected to both sides of the surface of the screw sleeve, the other end of the arc rod is fixedly connected to a frame with an arc structure, the inner cavity of the frame is slidably connected to a roller, and a sliding part is arranged between the bottom of the roller and the L-shaped plate.

[0012] As a further preferred solution of the present invention, the two frames are symmetrically arranged about the center of the shell.

[0013] As a further preferred embodiment of the present invention, the sliding member includes a slider rotatably connected to the bottom of the roller through a bearing, and a sliding hole for sliding the slider is opened at the bottom of the shell. The bottom of the slider passes through the sliding hole to the bottom of the shell and is fixedly connected to the corresponding L-shaped plate.

[0014] As a further solution of the utility model, the sliding block is in a T-shaped structure, and the width of the L-shaped plate is greater than the width of the sliding hole.

[0015] As a preferred solution of the utility model, one end of the stud movably penetrates to the outside of the shell and is fixedly connected with a knob, and the surface of the stud is rotatably connected to the penetration of the shell through a bearing.

[0016] As a preferred solution of the utility model, a through hole for the transmission rod to pass through is opened at the center of the shell.

[0017] As a further preferred embodiment of the present invention, a rubber ring pad is sleeved on the surface of the transmission rod, the rubber ring pad is located on the top of the docking plate, and a pressure ring for pressing the rubber ring pad is fixedly connected to the bottom of the shell, and the rubber ring pad, the pressure ring and the central axis of the through hole are in the same straight line.

[0018] Compared with the prior art, the pneumatic valve for filling refrigerant small cylinders provided by the utility model has the following beneficial effects: the utility model drives the threaded sleeve and the arc rod to move in the axial direction of the stud by rotating the stud, and the arc rod drives the L-shaped plate to move synchronously through the transmission member, so that the two L-shaped plates move synchronously toward or away from each other, and when the two L-shaped plates move toward each other, the shell and the docking plate are unlocked; when the two L-shaped plates move away from each other, the shell and the docking plate are locked, which not only achieves the effect of quick assembly, but also eliminates the need for a spring, eliminates the problem of spring fatigue under long-term use, effectively improves the stability of the connection between the shell and the docking plate, and further ensures the installation firmness of the pneumatic control box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only examples of the embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a fixed disk, a clamping assembly and an adjusting assembly in an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the exploded structure of the fixed disk, the clamping assembly and the adjusting assembly in the embodiment of the utility model;

[0023] Figure 4 It is a schematic cross-sectional structure diagram of the housing and the adjustment assembly in the embodiment of the utility model.

[0024] Reference numerals:

[0025] 1. Valve body; 2. Fixed plate; 3. Pneumatic control box;

[0026] 4. snap-fit ​​assembly; 41. docking plate; 42. transmission rod; 43. housing; 44. L-shaped plate; 45. slotted hole; 46. through hole;

[0027] 5. Adjustment assembly; 51. Stud; 52. Screw sleeve; 53. Curved rod; 54. Frame; 55. Roller; 56. Slider; 57. Sliding hole; 58. Knob;

[0028] 6. Rubber ring gasket; 7. Pressure ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0032] See attached Figure 1 As shown, the pneumatic valve for filling a refrigerant cylinder in the embodiment of the utility model comprises a valve body 1 connected to a refrigerant filling pipe through a flange. A fixed plate 2 is installed on the top of the valve body 1, a pneumatic control box 3 is arranged above the fixed plate 2, and a snap-on assembly 4 for realizing a detachable connection is arranged between the pneumatic control box 3 and the fixed plate 2.

[0033] See attached Figure 2-3 As shown, the clamping assembly 4 includes a docking plate 41 fixedly connected to the top of the fixed plate 2, a transmission rod 42 is provided at the center of the top of the docking plate 41, a shell 43 is movably sleeved on the surface of the transmission rod 42, the top of the shell 43 is fixedly connected to the bottom of the pneumatic control box 3, and two symmetrical L-shaped plates 44 are slidably connected to the bottom of the shell 43. A slot 45 for the L-shaped plate 44 to pass through is opened on the transmission rod 42, and an inner cavity of the shell 43 is provided with an adjustment assembly 5 for driving the two L-shaped plates 44 to move synchronously toward or away from each other.

[0034] The adjustment assembly 5 includes a stud 51 which is horizontally rotatably connected to the inner cavity of the housing 43 through a bearing. A threaded sleeve 52 is threadedly sleeved on the surface of the stud 51 , and a linkage is provided between the threaded sleeve 52 and the L-shaped plate 44 .

[0035] The pneumatic valve for filling refrigerant cylinders of the above technical solution is mainly composed of a valve body 1, a fixed plate 2, a pneumatic control box 3, a clamping assembly 4 and an adjusting assembly 5. By rotating the knob 58, the knob 58 drives the stud 51 to rotate. Under the action of the thread, the stud 51 drives the screw sleeve 52 to move horizontally along the axial direction of the stud 51. The screw sleeve 52 drives the arc rod 53 and the frame 54 to move synchronously in the direction of the knob 58. The inner wall surface of the frame 54 pushes the roller 55, so that the roller 55 rolls on the inner wall surface of the frame 54 and moves toward the center of the through hole 46. The roller 55 drives the slider 56 to slide in the inner cavity of the slide hole 57, and the slider 56 drives the L-shaped plate 44 to move synchronously, so that the two L-shaped plates 44 move synchronously toward each other to achieve the closing effect until the maximum limit. At this time, the pneumatic control box 3 can be moved upward to drive the shell 43, the L-shaped plate 44 and the adjustment component 5 to move upward synchronously, thereby completing the disassembly operation of the pneumatic control box 3, and the pneumatic control box 3 can be maintained or repaired; on the contrary, the above steps can be reversed to complete the assembly operation of the pneumatic control box 3.

[0036] See attached Figure 3-4 As shown, in order to drive the two frames 54 to move synchronously, the linkage includes an arc rod 53 fixedly connected to both sides of the surface of the screw sleeve 52, the other end of the arc rod 53 is fixedly connected to the frame 54 with an arc structure, the inner cavity of the frame 54 is slidably connected to a roller 55, and a sliding member is provided between the bottom of the roller 55 and the L-shaped plate 44. The stud 51 is rotated to make the screw sleeve 52 and the arc rod 53 move horizontally along the axis direction of the stud 51.

[0037] In order to achieve the closing or opening operation of the two L-shaped plates 44, the two frames 54 are symmetrically arranged about the center of the shell 43, so that when the two frames 54 move, they can correspondingly drive the two rollers 55 to move synchronously toward or away from each other.

[0038] In order to enable the roller 55 and the L-shaped plate 44 to move stably along the length direction of the sliding hole 57, the sliding member includes a slider 56 rotatably connected to the bottom of the roller 55 through a bearing, and a sliding hole 57 for the slider 56 to slide is provided at the bottom of the shell 43. The bottom of the slider 56 penetrates through the sliding hole 57 to the bottom of the shell 43 and is fixedly connected to the corresponding L-shaped plate 44, which can guide the roller 55 and the L-shaped plate 44.

[0039] In order to prevent the slider 56 and the L-shaped plate 44 from moving up and down, the slider 56 has a T-shaped structure, and the width of the L-shaped plate 44 is greater than the width of the sliding hole 57 , which can further improve the sliding stability of the slider 56 in the sliding hole 57 .

[0040] In order to facilitate the rotation of the stud 51 , one end of the stud 51 movably penetrates to the outside of the housing 43 and is fixedly connected to a knob 58 . The surface of the stud 51 is rotatably connected to the penetration of the housing 43 via a bearing.

[0041] In the embodiment of the utility model, a through hole 46 for the transmission rod 42 to pass through is opened at the center of the housing 43 .

[0042] In order to improve the friction and sealing between the shell 43 and the docking plate 41, a rubber ring gasket 6 is sleeved on the surface of the transmission rod 42, and the rubber ring gasket 6 is located on the top of the docking plate 41. The bottom of the shell 43 is fixedly connected with a pressing ring 7 for pressing the rubber ring gasket 6. The center axis of the rubber ring gasket 6, the pressing ring 7 and the through hole 46 are in the same straight line.

[0043] To sum up, the pneumatic valve for filling refrigerant small cylinders in the utility model embodiment drives the screw sleeve 52 and the arc rod 53 to move in the axial direction of the stud 51 by rotating the stud 51, and the arc rod 53 drives the L-shaped plate 44 to move synchronously through the transmission member, so that the two L-shaped plates 44 move synchronously toward or away from each other. When the two L-shaped plates 44 move toward each other, the shell 43 and the docking plate 41 can be unlocked; when the two L-shaped plates 44 move away from each other, the shell 43 and the docking plate 41 can be locked, which not only achieves the effect of rapid assembly, but also eliminates the need for a spring, eliminates the problem of spring fatigue under long-term use, effectively improves the stability of the connection between the shell 43 and the docking plate 41, and further ensures the installation firmness of the pneumatic control box 3.

[0044] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic valve for filling a small refrigerant steel cylinder, comprising a valve body (1) for filling a small refrigerant steel cylinder, wherein the valve body (1) is connected to a refrigerant filling pipe via a flange; Features: A fixed disk (2) is installed on the top of the valve body (1), a pneumatic control box (3) is arranged above the fixed disk (2), and a clamping assembly (4) for realizing a detachable connection is arranged between the pneumatic control box (3) and the fixed disk (2); The clamping assembly (4) comprises a docking plate (41) fixedly connected to the top of the fixed plate (2), a transmission rod (42) is provided at the center of the top of the docking plate (41), a shell (43) is movably sleeved on the surface of the transmission rod (42), the top of the shell (43) is fixedly connected to the bottom of the pneumatic control box (3), the bottom of the shell (43) is slidably connected to two L-shaped plates (44), the transmission rod (42) is provided with a slot (45) for the L-shaped plates (44) to pass through, and the inner cavity of the shell (43) is provided with an adjustment assembly (5) for driving the two L-shaped plates (44) to move synchronously; The adjustment assembly (5) comprises a stud (51) rotatably connected to the inner cavity of the housing (43); a threaded sleeve (52) is threadedly sleeved on the surface of the stud (51); and a linkage is provided between the threaded sleeve (52) and the L-shaped plate (44).

2. The pneumatic valve for filling refrigerant small cylinders according to claim 1 is characterized in that: The linkage comprises an arc-shaped rod (53) fixedly connected to both sides of the surface of the screw sleeve (52); the other end of the arc-shaped rod (53) is fixedly connected to a frame (54) having an arc-shaped structure; a roller (55) is slidably connected to the inner cavity of the frame (54); and a sliding member is provided between the bottom of the roller (55) and the L-shaped plate (44).

3. The pneumatic valve for filling refrigerant small cylinders according to claim 2 is characterized in that: The two frames (54) are symmetrically arranged about the center of the shell (43).

4. The pneumatic valve for filling refrigerant small cylinders according to claim 2 is characterized in that: The sliding member comprises a slider (56) rotatably connected to the bottom of the roller (55) via a bearing, a sliding hole (57) for the slider (56) to slide is provided at the bottom of the housing (43), and the bottom of the slider (56) passes through the sliding hole (57) to the bottom of the housing (43) and is fixedly connected to the corresponding L-shaped plate (44).

5. The pneumatic valve for filling refrigerant small cylinders according to claim 4 is characterized in that: The sliding block (56) has a T-shaped structure, and the width of the L-shaped plate (44) is greater than the width of the sliding hole (57).

6. The pneumatic valve for filling refrigerant small cylinders according to claim 1 is characterized in that: One end of the stud (51) movably penetrates the outside of the housing (43) and is fixedly connected to a knob (58), and the surface of the stud (51) is rotatably connected to the penetration point of the housing (43) via a bearing.

7. The pneumatic valve for filling refrigerant small cylinders according to claim 1, characterized in that: A through hole (46) for the transmission rod (42) to pass through is provided at the center of the housing (43).

8. The pneumatic valve for filling refrigerant small cylinders according to claim 7, characterized in that: A rubber ring gasket (6) is sleeved on the surface of the transmission rod (42), and the rubber ring gasket (6) is located on the top of the docking plate (41). A pressing ring (7) for pressing the rubber ring gasket (6) is fixedly connected to the bottom of the housing (43), and the rubber ring gasket (6), the pressing ring (7) and the central axis of the through hole (46) are on the same straight line.

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