Inflation and deflation valve suitable for plug-in type inflation gun head

Abstract

The utility model discloses an inflation and deflation valve suitable for an insertion type inflation gun head. The inflation and deflation valve comprises a valve body and a valve clack assembly. The valve body comprises a valve pipe and a cross-shaped support. The upper portion of the valve pipe is in a straight pipe shape, and the lower portion of the valve pipe is provided with a horn-shaped valve edge extending towards the periphery. The cross support is fixed to the center of a lower pipe opening of the valve pipe, and the four end points of the cross support are connected with the valve pipe into a whole. A mounting hole is formed in the center of the cross-shaped bracket; the valve clack assembly comprises a spherical-crown-shaped valve clack and an installation column, the installation column is perpendicularly fixed to the top point of the top face of the spherical-crown-shaped valve clack, a column body of the installation column penetrates into the installation hole upwards from the bottom of the cross-shaped support and is fixed, and the spherical-crown-shaped valve clack covers a lower pipe opening of the valve pipe. Through the innovatively designed linkage structure of the spherical crown-shaped valve clack assembly and the cross-shaped support, on the basis that the compatibility of a traditional insertion type inflation gun is kept, a triple sealing system with the dynamic response characteristic is constructed, and the zero leakage performance under the compressive strength of 0.5 MPa is achieved in laboratory testing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a charge and discharge valve technology field, especially to a charge and discharge valve suitable for plug-in type air charging gun head. BACKGROUND

[0002] The buffer air bag widely used in the field of logistics transportation is provided with a charge and discharge valve structure on the bag body, and needs to be matched with special air charging equipment to realize gas infusion. The current mainstream push piece type air charging valve is usually composed of a valve body, a valve cover and an internal single / dual valve piece assembly. Although this structure can realize basic sealing function, it exposes significant defects in actual working conditions: the valve cover is easy to be not closed or not screwed in place by the operator, causing gas leakage when the air bag is extruded by external force. This structural defect directly leads to the failure of the buffer protection function, and further causes the risk of goods damage.

[0003] In view of this technical pain point, the industry has considered using a thimble type air valve to replace the structure. However, it is found in actual promotion that the existing plug-in type air charging gun and the thimble type valve body have interface incompatibility problems. If the air valve is upgraded, a large number of air charging equipment at the user end will be forced to be eliminated, which not only causes resource waste but also significantly increases the use cost. This technical contradiction forms a prominent contradiction between "valve body improvement demand and air charging equipment compatibility" in the logistics industry, and an innovative solution is urgently needed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a charge and discharge valve suitable for plug-in type air charging gun head, which not only has simple structure, but also can improve the sealing effect of the valve body and adapt to the existing plug-in type air charging gun head of the user.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A charge and discharge valve suitable for plug-in type air charging gun head, characterized in that it comprises a valve body and a valve flap assembly; the valve body comprises a valve pipe and a cross support; the upper part of the valve pipe is in a straight pipe shape, and the lower part is provided with a horn-shaped valve edge extending to the periphery; the cross support is fixed to the center of the lower pipe opening of the valve pipe, and four end points thereof are integrated with the valve pipe; the center of the cross support is provided with a mounting hole; the valve flap assembly comprises a spherical crown-shaped valve flap and a mounting column, the mounting column is vertically fixed to the top point of the top surface of the spherical crown-shaped valve flap, the column body penetrates into the mounting hole from the bottom of the cross support and is fixed upward, and the spherical crown-shaped valve flap covers the lower pipe opening of the valve pipe.

[0007] Further preferably, the upper part of the valve pipe is provided with external threads.

[0008] Further preferably, the air charging and discharging valve further comprises a valve cover, which is detachably connected with the valve pipe through external threads on the upper part of the valve pipe, and the inside of the valve cover is provided with a sealing gasket in close contact with the upper pipe opening of the valve pipe.

[0009] Further preferably, the outer surface of the valve cover is provided with anti-skid lines, which are distributed in a ring shape or a spiral shape.

[0010] Further preferably, the top of the valve cover is provided with a handle, which is connected with the valve body through a connecting rope.

[0011] Further preferably, the lower surface of the cross-shaped support is an arc surface matched with the spherical cap-shaped valve flap.

[0012] Further preferably, the mounting column and the mounting hole are in interference fit or snap connection.

[0013] Further preferably, the valve flap is made of silicone rubber or ethylene propylene diene rubber.

[0014] Further preferably, the valve pipe outer wall of the horn-shaped valve edge is provided with a mounting groove along the circumferential direction, which is a ring groove or a dovetail groove, for fixing the connection between the valve pipe and the buffer air bag.

[0015] Further preferably, the lower pipe of the valve pipe protrudes from the cross-shaped support, and the spherical cap-shaped valve flap is closely attached to the lower pipe.

[0016] The beneficial effects of the present application are as follows:

[0017] The spherical cap-shaped valve flap assembly and the cross-shaped support linkage structure designed in the present application have the following advantages: on the basis of maintaining the compatibility of the traditional plug-in type air charging gun, a three-seal system with dynamic response characteristics is constructed, including the initial seal formed by the self-elastic force of the valve flap and the lower pipe, the directional opening and closing control driven by the air charging pressure, and the reinforced seal of the air bag internal pressure; in combination with the valve cover assembly with a sealing gasket, zero leakage performance under 0.5 MPa pressure resistance is achieved in laboratory tests. The present application relies on the seamless adaptation of the straight pipe valve body and the existing air charging equipment, reduces the equipment update cost by 85%, and fundamentally solves the equipment compatibility contradiction and the risk control problem of goods damage in the air charging valve upgrading process of the logistics industry. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic diagram of the present application.

[0019] Figure 2 is the structure schematic diagram of the valve pipe.

[0020] Figure 3 is the structure schematic diagram of the cross-shaped support.

[0021] Figure 4 This is a schematic diagram of the valve disc assembly.

[0022] In the diagram: 1-valve body, 2-valve disc assembly, 3-valve cover; 11-valve pipe, 12-cross bracket, 111-flare-shaped valve edge, 112-mounting groove, 113-lower pipe edge, 121-mounting hole, 21-spherical crown valve disc, 22-mounting post, 31-valve cover body, 32-sealing gasket, 33-handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] like Figures 1-3 As shown, this inflation / deflation valve, applicable to insert-type inflation nozzles, includes: valve body 1, valve disc assembly 2, and valve cover 3. The specific structure and connection relationships of each part are as follows:

[0026] Valve body 1 includes valve pipe 11 and cross bracket 12.

[0027] Valve tube 11: The upper part is a straight tube structure with an inner wall surface roughness Ra≤0.8μm; the lower part extends to form a trumpet-shaped valve edge 111 (expansion angle α=135°±5°). The upper part of the valve tube is provided with external threads.

[0028] A mounting groove 112 is provided on the outer wall of the valve tube next to the horn-shaped valve along its circumference. The mounting groove 112 is an annular groove or a dovetail groove, which is used to fix the connection between the valve tube 11 and the buffer air bag.

[0029] Cross bracket 12: integrally formed at the lower opening of the valve tube, the bracket arm thickness t = 1.5mm, with a Φ2.5mm mounting hole 121 in the center, and the lower surface is an arc surface matching the spherical valve disc. The lower pipe edge 113 of the valve tube 11 protrudes from the cross bracket 12.

[0030] Valve disc assembly 2 includes: a spherical crown valve disc 21 and a mounting post 22.

[0031] The spherical crown valve disc 21 is made of silicone rubber, with a spherical crown radius R = 12 mm and an edge thickness δ = 0.8 mm. The spherical crown valve disc 21 covers the lower opening of the valve tube 11 and fits tightly against the lower edge 113 of the valve tube.

[0032] Mounting post 22: ABS cylinder with diameter Φ2.45mm (interference fit tolerance -0.05~0mm), vertically fixed at the top of the valve disc 21, the mounting post 22 penetrates the mounting hole 121 from the bottom of the cross bracket 12 to form a barb type snap connection.

[0033] Valve cover 3:

[0034] Valve cover body 31: PP material screw cover with outer diameter Φ18mm, the inner wall is provided with M8x1mm thread matched with the outer thread of the upper part of the valve pipe 11. The outer surface of the valve cover 3 is provided with anti-skid lines in the form of ring or spiral.

[0035] Sealing washer 32: EPDM ring gasket with thickness of 2mm, compression deformation rate of 18%±2%.

[0036] Handle 33: can be connected with the valve body 1 through nylon connecting rope, which can prevent the valve cover from being lost.

[0037] The working principle is as follows:

[0038] After unscrewing the valve cover 3, the plug-in type inflator gun head is inserted along the axial direction of the valve pipe 11. During the inflation stage, the airflow impact makes the spherical crown-shaped valve disc 21 produce elastic deformation downward, and the airflow enters the inflation bag cavity through the expanded valve disc edge. When the inflation is stopped, the spherical crown-shaped valve disc 21 is reset under the action of its own rebound force and the gas pressure in the bag, its edge is closely separated from the lower pipe edge 113, its disc body is in surface contact sealing with the arc surface of the cross bracket 12, and the cross bracket 12 provides support for it to inhibit further deformation of the valve disc. When the inflation bag is pressed, the reverse air pressure enhances the adhesion pressure of the spherical crown-shaped valve disc 21 and the lower pipe edge 113 of the valve pipe. Finally, the valve cover 3 is tightened, the sealing washer 32 of the valve cover 3 generates a contact pressure of 0.25-0.35MPa with the upper end surface of the valve pipe, forming a secondary sealing guarantee. The handle 33 can prevent the valve cover 3 from being lost, ensuring the integrity of the airtight system.

[0039] When deflating, one corner of the spherical crown-shaped valve disc 21 is inserted from the outside to open it, so that the deflation operation can be quickly completed.

[0040] Inflation valve pressure resistance performance comparison test table:

[0041]

[0042] It has to be noted that, as used herein, such terms as "including", "including a", "having", "comprising", "containing", or any other similar term are intended to be encompassing for a passage, a method, an article, or an apparatus that fails to explicitly disclose separate instances of the listed elements. In other words, such terms are to be interpreted in the context as specifying instances of the listed elements but do not preclude the presence of additional elements in the passage, the method, the article, or the apparatus that are either listed elements or additional elements inherent to such passage, method, article, or apparatus.

[0043] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An inflation / deflation valve suitable for insert-type inflation nozzles, characterized in that, The device includes a valve body and a valve disc assembly. The valve body includes a valve tube and a cross-shaped support. The upper part of the valve tube is straight, and the lower part has a flared valve edge extending in all directions. The cross-shaped support is fixed to the center of the lower opening of the valve tube, and its four ends are integrated with the valve tube. The center of the cross-shaped support has a mounting hole. The valve disc assembly includes a spherical crown-shaped valve disc and a mounting post. The mounting post is vertically fixed to the top apex of the spherical crown-shaped valve disc, and its column extends upward from the bottom of the cross-shaped support into the mounting hole and is fixed thereto. The spherical crown-shaped valve disc covers the lower opening of the valve tube.

2. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 1, characterized in that, The valve tube has an external thread on its upper part.

3. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 2, characterized in that, The inflation / deflation valve also includes a valve cover, which is detachably connected to the valve tube via an external thread on the upper part of the valve tube. The valve cover has a sealing gasket inside that is in close contact with the upper opening of the valve tube.

4. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 3, characterized in that, The outer surface of the valve cover is provided with anti-slip texture, which is distributed in a ring or spiral shape.

5. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 3, characterized in that, The valve cover is provided with a handle on the top, and the handle is connected to the valve body by a connecting rope.

6. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 1, characterized in that, The lower surface of the cross-shaped support is an arc surface that matches the spherical valve disc.

7. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 1, characterized in that, The mounting post and the mounting hole are either interference fit or snap-fit ​​connected.

8. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 1, characterized in that, The spherical valve disc is made of silicone rubber or EPDM rubber.

9. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 1, characterized in that, A mounting groove is provided on the outer wall of the valve tube next to the horn-shaped valve along its circumference. The mounting groove is an annular groove or a dovetail groove, which is used to fix the connection between the valve tube and the cushioning air bag.

10. The inflation / deflation valve for an insert-type inflation nozzle as described in claim 1, characterized in that, The lower edge of the valve tube protrudes from the cross-shaped support, and the spherical valve disc fits tightly against it.

Images