A porous seal structure and its installation method

Abstract

The present invention discloses a porous seal structure and an installation method thereof, comprising a hand-held handle and a seal cylinder, wherein a transfer cavity is provided in the seal cylinder, a liquid injection cavity is provided in the hand-held handle, the hand-held handle and the seal cylinder are arranged to slide relative to each other, a first through hole is provided at the lower end of the liquid injection cavity, which can be connected to the transfer cavity, an exhaust hole is provided at the upper end of the transfer cavity of the seal cylinder, a seal body is provided at the lower end of the seal cylinder, a printing cavity corresponding to the upper side of the seal body is provided in the seal cylinder, and a second through hole connected to the printing cavity is provided in the transfer cavity; a stretching reset member is provided between the lower end of the hand-held handle and the upper end of the printing cavity of the seal cylinder. The advantage of the present invention is that it does not require accessories such as an ink box, ink is easily added, and ink can be added once and used repeatedly in large quantities; it solves the problem that existing porous copper seals have a slow ink seepage speed and cannot meet the needs of large-scale stamping.

Description

Technical Field

[0001] The present invention relates to the technical field of porous seals, in particular to a porous seal structure and an installation method thereof. Background Art

[0002] Copper seals are cast from copper metal, known for their high hardness, resistance to deformation, long shelf life, and resistance to corrosion. However, due to their dense copper material, copper seals have two drawbacks: first, they require an ink pad box and other accessories, requiring the seal to be dipped in ink each time. Second, the seal can be unevenly applied, with excess or insufficient ink. To address these issues, a porous copper seal has emerged on the market. Its porous structure is similar to the pore size of the ultramicrobubble material in photosensitive seals—small and evenly distributed. During stamping, ink seeps through the tiny pores of the base. Due to its unique structure, this porous copper seal material combines many of the advantages of copper and photosensitive seals while addressing the shortcomings of dense copper seals. It also addresses the shortcomings of photosensitive seals, such as easy deformation, oil resistance, and a short service life. However, due to its unique structure and material, porous copper seals inherently have a slow ink absorption rate, making them unsuitable for large-scale stamping.

[0003] Patent No. CN2022110559577 in the Chinese patent literature discloses a porous metal seal that stores ink through an elastic ink reservoir to achieve control of the ink volume. However, its disadvantage is that although the elastic ink reservoir can have a certain ink storage capacity, the ink storage capacity is small and it is not easy to add ink later, and it still cannot meet the needs of large-scale stamping. Summary of the Invention

[0004] Based on the above-mentioned deficiencies in the prior art, the present invention provides a porous seal structure and an installation method thereof, which does not require accessories such as an ink box, is convenient for adding ink, and can be used repeatedly in large quantities after adding ink once; it solves the problem that the existing porous copper seal has a slow ink seepage speed and cannot meet the needs of large-scale stamping.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] A multi-porous seal structure is characterized in that it includes a hand-held handle and a seal tube, a transfer cavity is provided in the seal tube, a liquid injection cavity is provided in the hand-held handle, the hand-held handle and the seal tube are arranged to slide relative to each other, the lower end of the liquid injection cavity is provided with a No. 1 through hole that can be connected to the transfer cavity, the seal tube is provided with an exhaust hole at the upper end of the transfer cavity, the lower end of the seal tube is provided with a seal body, a printing cavity corresponding to the upper side of the seal body is provided in the seal tube, and a No. 2 through hole connected to the printing cavity is provided in the transfer cavity; a stretching and resetting component is provided between the lower end of the hand-held handle and the upper end of the printing cavity of the seal tube.

[0007] The present application injects ink into the liquid injection cavity. During the downward pressing of the hand-held handle, when the No. 1 through hole is connected to the transfer cavity, the ink flows from the liquid injection cavity into the transfer cavity. During the downward pressing of the hand-held handle, the ink in the printing cavity is partially squeezed into the seal body, and partially squeezed into the transfer cavity from the No. 2 through hole. The gas in the transfer cavity is discharged from the exhaust hole. After one stamping is completed, under the action of the stretching reset member, the seal cylinder and the hand-held handle move relative to each other, and a negative pressure is formed in the printing cavity, which can suck back the excess ink on the concave surface of the seal body and suck out part of the ink from the transfer cavity to replenish the ink in the printing cavity, which is convenient for the next stamping. By injecting a sufficient amount of ink into the liquid injection cavity through the present application, it can be used repeatedly, and can complete the continuous stamping of large quantities of documents, thereby improving the stamping efficiency. In addition, the ink seepage speed is fast, and the ink will not accumulate on the concave surface of the seal body to cause stamping defects, thereby ensuring the stamping quality.

[0008] Preferably, the flux of through hole No. 1 is equal to the flux of through hole No. 2. In the early stage of the handle being compressed, the internal cavity will not generate positive pressure, thereby preventing gas from being sucked back into the transfer cavity and affecting the ink filling effect.

[0009] Preferably, the upper end of the liquid injection cavity in the handle is provided with a liquid injection opening, and the upper end of the handle is provided with a terminal that can seal the liquid injection opening. The provision of the liquid injection opening facilitates liquid injection into the handle, and the provision of the terminal can prevent ink from flowing out of the liquid injection cavity and improve the convenience of the liquid injection operation.

[0010] Preferably, the seal cylinder comprises an outer seal cylinder and an inner seal cylinder, with a transfer cavity located between the outer and inner seal cylinders, and an exhaust hole located on the outer seal cylinder. The seal cylinder adopts a combined structure in which the outer and inner seal cylinders are nested. The transfer cavity is automatically formed by assembling the inner and outer seal cylinders. The transfer cavity is well sealed, easily formed, and the combined structure of the seal cylinder is stable.

[0011] Preferably, the exhaust holes include a vertically arranged No. 1 hole and a No. 2 hole arranged perpendicular to the No. 1 hole. The No. 1 hole is connected to the No. 2 hole. The No. 1 hole includes a gas gathering section located above the No. 2 hole. The gas gathering section is a blind hole structure. The lower end of the No. 1 hole is connected to the transfer cavity, and the outer end of the No. 2 hole is connected to the outside world. The connecting hole formed by the combination of the No. 1 and No. 2 holes enables the upper end of the transfer cavity to be connected to the outside atmosphere. Since the No. 1 hole and the No. 2 hole are provided with the gas gathering section at the upper end, when the gas flows out of the transfer cavity, the gas mixed with the evaporated ink will pass through the gas gathering section, condense in the gas gathering section, and then flow back out of the No. 2 hole. This can reduce the evaporation loss of the ink and improve the utilization efficiency of the ink.

[0012] Preferably, a seal cover covering the seal body is provided at the lower end of the seal outer cylinder, and the seal cover is threadedly connected to the seal outer cylinder. The seal cover plays a role in protecting the seal body and preventing the ink from drying and hardening. The seal cover is easy to connect and disassemble, and is convenient for the use of the seal.

[0013] Preferably, a sealing ring is provided in the inner hole of the upper end of the seal outer cylinder for contact and sealing with the hand-held handle. The sealing ring realizes sliding sealing between the seal cylinder and the hand-held handle, thereby ensuring the airtight performance of the upper end of the transfer cavity.

[0014] A method for installing the porous seal structure includes the following steps:

[0015] A. Install the stretch reset piece and the handle; one end of the handle and the stretch reset piece are fixed with a positioning pin;

[0016] B. A reserved through hole for the corresponding stretching and resetting member is provided on the outer end surface of the inner cylinder of the seal;

[0017] C. Install the stretch reset piece and the seal inner cylinder; assemble the hand handle and the stretch spring together into the seal inner cylinder, and rotate the hand handle so that the other end of the stretch spring extends out of the reserved through hole to limit;

[0018] D. Install the seal inner cylinder and the seal body; locally heat the inner diameter end of the seal inner cylinder and install the seal body into the seal inner cylinder by heat-fitting;

[0019] E. Install the seal inner cylinder and the seal outer cylinder; locally heat the end of the seal outer cylinder and install the seal inner cylinder into the seal outer cylinder by hot-fitting;

[0020] F. The retaining ring between the seal outer cylinder and the installation sealing ring and the limit sealing ring;

[0021] G. Place the end cap and seal cover on the corresponding positions of the handheld handle and the seal outer tube respectively and tighten them to complete the installation.

[0022] The seal can be reliably assembled and has high stability after assembly.

[0023] The beneficial effects of the present invention are as follows: by injecting a sufficient amount of ink into the liquid injection cavity, the ink can be used repeatedly, and continuous stamping of large quantities of documents can be completed, thereby improving the stamping efficiency; the ink seepage speed is fast, and the ink will not accumulate on the concave surface of the seal body to cause stamping defects, thereby ensuring the stamping quality; the overall structure has high stability, high reliability, and strong integrity after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural explosion diagram of the present invention.

[0025] Figure 2 It is a longitudinal sectional view of the present invention.

[0026] Figure 3 It is a schematic diagram of the definitions of various horizontal planes and chambers of the present invention.

[0027] Figure 4It is a schematic diagram of the overall structure of the present invention when the seal cover is removed and used.

[0028] In the figure: handle 1 liquid injection cavity 2 end 3 sealing gasket 4 No. 1 through hole 5 seal outer tube 6 sealing ring 7 retaining ring 8 seal inner tube 9 transfer cavity 10 No. 2 through hole 11 seal body 12 printing cavity 13 exhaust hole 14 No. 1 air hole 15 No. 2 air hole 16 gas gathering section 17 stretching reset part 18 seal cover 19. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1,

[0031] like Figure 1 and Figure 4 As shown, a porous seal structure includes a handheld handle 1 and a seal tube, and the handheld handle 1 and the seal tube are arranged to slide relative to each other. A transfer cavity 10 is provided in the seal tube, and a liquid injection cavity 2 is provided in the handheld handle 1. The upper end of the liquid injection cavity 2 in the handheld handle 1 is provided with a liquid injection opening, and the upper end of the handheld handle 1 is provided with an end cap 3 capable of sealing the liquid injection opening. The end cap 3 is threadedly connected to the outer end of the handheld handle 1, and a sealing gasket 4 corresponding to the liquid injection opening is provided in the end cap 3. The shape of the end cap 3 is an ellipsoid, and the shape of the handheld handle 1 is a stepped cylinder formed by combining two coaxial cylinders with a smaller upper part and a larger lower part. The length of the upper cylinder of the handheld handle 1 is greater than the diameter of the lower cylinder of the handheld handle 1, and the liquid injection cavity 2 is provided in the upper cylinder of the handheld handle 1.

[0032] The lower end of the liquid injection chamber 2 is provided with a first through hole 5 that connects to the transfer chamber 10. This through hole 5 is located on the bottom surface of the liquid injection chamber 2, i.e., above the surface S2, and its axis is perpendicular to the axis of the liquid injection chamber 2. The first through hole 5 comprises a plurality of unit holes arranged in a circular array around the axis of the liquid injection chamber 2. The seal cylinder comprises an outer seal cylinder 6 and an inner seal cylinder 9. The lower end of the seal cylinder comprises a seal body 12, which is made of a porous copper alloy and is permeable to liquids. Due to capillary action, this seal body 12 also has a certain liquid storage function. A printing cavity 13 is provided within the seal cylinder, corresponding to the upper side of the seal body 12. The transfer chamber 10 is provided with a second through hole 11 that connects to the printing cavity 13. The second through hole 11 comprises a plurality of unit holes arranged around the axis of the transfer chamber 10. The flux of the first through hole 5 is equal to that of the second through hole 11.

[0033] A sealing ring 7 is provided in the inner hole at the upper end of the seal outer cylinder 6, which contacts and seals the handle 1. The upper end of the sealing ring 7 abuts against a retaining ring 8 fixed to the seal outer cylinder 6. The retaining ring 8 secures the sealing ring 7 and provides a sliding seal between the handle 1 and the seal cylinder. The seal outer cylinder 6 is cylindrical, with a stepped hole in the center. The small diameter through hole is the same size as the outer diameter of the handle 1. An annular groove is provided on the outer side surface of the seal outer cylinder 6, i.e., surface S1, extending outward from the small diameter through hole. This groove is used to accommodate the sealing ring 7 and retaining ring 8, preventing leakage of the internal ink when the handle 1 reciprocates up and down. The seal cylinder is provided with an exhaust hole 14 at the upper end of a transfer cavity 10 located between the seal outer cylinder 6 and the seal inner cylinder 9. The exhaust hole 14 is located on the seal outer cylinder 6. The exhaust hole 14 includes a vertically arranged No. 1 air hole 15 and a No. 2 air hole 16 arranged perpendicular to the No. 1 air hole 15. The No. 1 air hole 15 is connected to the No. 2 air hole 16. The No. 1 air hole 15 includes a gas gathering section 17 located above the No. 2 air hole 16. The gas gathering section 17 is a blind hole structure. The lower end of the No. 1 air hole 15 is connected to the transfer cavity 10, and the outer end of the No. 2 air hole 16 is connected to the outside world.

[0034] The outer surface of the seal inner cylinder 9 is shaped like a stepped cylinder, with the larger diameter being shorter than the smaller diameter. The outer diameter of the larger cylinder is the same as the larger diameter of the inner wall of the seal outer cylinder 6. This creates a transit cavity 10 of volume V1 between the seal outer cylinder 6 and the seal inner cylinder 9. A stepped hole is located in the center of the seal inner cylinder 9. The larger diameter of the stepped hole is the same as the outer diameter of the lower cylinder of the handle 1, while the smaller diameter of the stepped hole is the same as the outer diameter of the upper cylinder of the handle 1. A plurality of secondary through-holes 11 are arranged along the stepped surface S7 of the seal inner cylinder 9, perpendicular to the axis of the stepped hole.

[0035] A tension reset member 18 is installed between the lower end of the handle 1 and the upper end of the printing cavity 13 of the stamp cylinder. This member 18 is a tension spring with an inner diameter larger than the outer diameter of the upper cylindrical portion of the handle 1. The spring is positioned so that it fits over the outer surface of the upper cylindrical portion of the handle 1. In its initial position, the spring is unloaded and unstretched. When subjected to an external force, it stretches and automatically returns to its initial position after the external force ceases.

[0036] The lower end of the seal outer cylinder 6 is provided with a seal cover 19 that covers the seal body 12. The seal cover 19 is a cylindrical structure with an outer diameter that is the same as the outer diameter of the seal outer cylinder 6. The seal cover 19 has a countersunk hole of a certain size in the center, and the diameter of the countersunk hole is larger than the size of the larger diameter of the inner wall of the seal outer cylinder 6. The seal countersunk hole has a partial thread inside, and the seal cover 19 is connected to the seal outer cylinder 6 through the thread.

[0037] Example 2,

[0038] A method for installing the porous seal structure includes the following steps:

[0039] A. Install the stretch reset member 18 and the handle 1; the handle 1 and one end of the stretch reset member 18 are fixed by a positioning pin;

[0040] B. A reserved through hole for corresponding stretching and resetting member 18 is opened on the outer end surface of the stamp inner cylinder 9, namely surface S4;

[0041] C. Install the stretch reset member 18 and the seal inner cylinder 9; assemble the hand handle 1 and the stretch spring together into the seal inner cylinder 9, and rotate the hand handle 1 so that the other end of the stretch spring extends out of the reserved through hole;

[0042] D. Install the seal inner cylinder 9 and the seal body 12; locally heat the inner diameter end of the seal inner cylinder 9 and install the seal body 12 to the seal inner cylinder 9 by heat-fitting;

[0043] E, install the seal inner cylinder 9 and the seal outer cylinder 6; locally heat the seal outer cylinder 6 port, and install the seal inner cylinder 9 in the seal outer cylinder 6 by heat-fitting;

[0044] F. Install the seal ring 7 and the retaining ring 8 of the limit seal ring 7 on the seal outer cylinder 6;

[0045] G. Tighten the end 3 and the seal cover 19 at the corresponding positions of the handheld handle 1 and the seal outer tube 6 respectively, and the installation is completed.

[0046] When the seal is in the initial position without any external force, the distance between the lowest point of the small hole K around the bottom surface S2 of the liquid injection cavity 2 in the handle 1 and the inner wall step surface S3 of the seal outer tube 6 is L1, and the distance between the end surface S6 of the cylinder at the lower end of the handle 1 and the step surface S7 of the seal inner tube 9 is L2, ensuring that L1>L2; the volume of the hollow chamber formed between the seal outer tube 6 and the seal inner tube 9 is V1, and the volume of the cylindrical chamber formed in the seal inner tube 9 from the step surface S7 to the end surface S8 of the seal body 12 is V2, ensuring that V1+V Q ≤V2(where V Q is the volume of the second through hole 11).

[0047] When using for the first time, first unscrew the handle end 3 and add ink to the injection chamber 2 of the handheld handle 1. Press the handle end 3 vertically, and the handheld handle 1 will move in the direction of the force, which will drive the tension spring to stretch. When the handheld handle 1 moves a distance L1, the ink will spray outward along the No. 1 through hole 5 at the bottom of the injection chamber 2 under the action of gravity, and the ink will be smoothly injected into the transfer cavity 10 formed between the outer cylinder 6 and the inner cylinder 9 of the seal. At this time, the end face S6 of the lower cylinder of the handheld handle 1 moves to a point below the stepped surface S7 of the inner cylinder 9 of the seal. Because the lower cylinder of the handheld handle 1 blocks all the No. 2 through holes 11. Therefore, the ink is retained in the transfer cavity 10 formed between the outer cylinder 6 and the inner cylinder 9 of the seal.

[0048] When the force acting on the end 3 of the handle 1 is removed, the tension spring generates a contraction force, which drives the handle 1 to move in the opposite direction of the applied force until the handle 1 as a whole moves back to its initial position. At this time, the ink in the inner chamber is injected into the cylindrical chamber formed from the step surface S7 to the end surface S8 of the seal body 12 in the seal inner cylinder 9 through the second through hole 11. Q ≤V2(where V Q For the volume of the second through hole 11), the ink is completely below the step surface S7 of the seal inner tube 9. After a short rest, the ink will seep into the porous copper seal body 12.

[0049] Press the end 3 of the hand-held handle 1 again, and there is a cavity above the step surface S7 of the inner cylinder 9 of the seal. During the compression process, part of the air goes along the No. 2 through hole 11 to the transfer cavity 10 formed between the outer cylinder 6 and the inner cylinder 9 of the seal, and then to the exhaust hole 14, and is finally discharged into the atmosphere; and some of the gas generates pressure on the ink liquid surface under the action of positive pressure.

[0050] When the seal moves to a point below the stepped surface S7 of the inner cylinder 9, the intermediate cavity 10 formed between the outer cylinder 6 and the inner cylinder 9 is once again filled with ink. At this point, the cylindrical cavity of the inner cylinder 9 is completely isolated from the outside atmosphere, and the liquid level is completely under positive pressure. Ultimately, the ink seeps into the paper along the convex surface (non-engraved surface) of the porous copper seal body 12. Small droplets may remain on the concave surface (engraved surface). When the force on the handle 1 is removed, the handle 1 automatically rebounds, creating a negative pressure within the cylindrical cavity formed between the stepped surface S7 of the inner cylinder 9 and the end surface S8 of the seal body 12. This absorbs any remaining droplets on the concave surface (engraved surface) back into the seal body 12 or the injection cavity 2. The ink in the intermediate cavity 10 formed between the outer cylinder 6 and the inner cylinder 9 is then re-injected into the printing cavity 13, where it comes into contact with the seal body 12.

[0051] Through the above operations, the seal can be stamped repeatedly multiple times.

[0052] By injecting a sufficient amount of ink into the injection chamber 2, the present invention can be used repeatedly, and can complete the continuous stamping of large quantities of documents, thereby improving the stamping efficiency; and the ink seepage speed is fast, and the ink will not accumulate on the concave surface of the seal body 12 to cause stamping defects, thereby ensuring the stamping quality.

Claims

1. A porous seal structure, characterized in that: The seal cylinder comprises a hand-held handle and a seal barrel, wherein a transfer cavity is provided in the seal barrel, a liquid injection cavity is provided in the hand-held handle, the hand-held handle and the seal barrel are arranged to slide relative to each other, a first through hole is provided at the lower end of the liquid injection cavity and can communicate with the transfer cavity, the seal barrel is provided with an exhaust hole at the upper end of the transfer cavity, a seal body is provided at the lower end of the seal barrel, a printing cavity corresponding to the upper side of the seal body is provided in the seal barrel, and a second through hole is provided in the transfer cavity and communicates with the printing cavity; a stretching and resetting member is provided between the lower end of the hand-held handle and the upper end of the printing cavity of the seal barrel; The seal cylinder comprises an outer seal cylinder and an inner seal cylinder, and the transfer cavity is located between the outer seal cylinder and the inner seal cylinder; The lower end of the seal outer cylinder is provided with a seal cover covering the seal body; The distance from the lowest point of the No. 1 through hole to the stepped surface of the inner wall of the seal outer tube is L1, and the distance from the end face of the cylindrical surface at the lower end of the handle to the stepped surface of the seal inner tube is L2, ensuring that L1>L2; The volume of the transfer cavity is V1, and the volume of the second through hole is V Q The volume of the cylindrical chamber formed from the step surface to the end face of the seal body in the printing cavity is V2, ensuring that V1+V Q ≤V2; The upper end of the liquid injection cavity in the hand-held handle is provided with a liquid injection opening, and the upper end of the hand-held handle is provided with an end head capable of sealing the liquid injection opening.

2. A porous seal structure according to claim 1, characterized in that: The flux of the No. 1 through hole is equal to the flux of the No. 2 through hole.

3. A porous seal structure according to claim 1, characterized in that: The exhaust hole is located on the outer cylinder of the seal.

4. A porous seal structure according to claim 1 or 3, characterized in that: The exhaust holes include a vertically arranged air hole No. 1 and an air hole No. 2 arranged perpendicular to the air hole No.

1. The air hole No. 1 is connected to the air hole No.

2. The air hole No. 1 includes an air gathering section located above the air hole No.

2. The air gathering section is a blind hole structure. The lower end of the air hole No. 1 is connected to the transfer cavity, and the outer end of the air hole No. 2 is connected to the outside world.

5. The porous seal structure according to claim 1, characterized in that: The seal cover is threadedly connected to the seal outer cylinder.

6. The porous seal structure according to claim 3, characterized in that: A sealing ring which contacts and seals with the hand-held handle is provided in the inner hole of the upper end of the seal outer cylinder.

7. A method for installing a porous seal structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: A. Install the stretch reset piece and the handle; one end of the handle and the stretch reset piece are fixed with a positioning pin; B. A reserved through hole for the corresponding stretching and resetting member is provided on the outer end surface of the inner cylinder of the seal; C. Install the stretch reset piece and the seal inner cylinder; assemble the hand handle and the stretch spring together into the seal inner cylinder, and rotate the hand handle so that the other end of the stretch spring extends out of the reserved through hole to limit; D. Install the seal inner cylinder and the seal body; locally heat the inner diameter end of the seal inner cylinder and install the seal body into the seal inner cylinder by heat-fitting; E. Install the seal inner cylinder and the seal outer cylinder; locally heat the end of the seal outer cylinder and install the seal inner cylinder into the seal outer cylinder by heat-fitting; F. Install the sealing ring and the retaining ring of the limit sealing ring at the port where the outer cylinder of the seal contacts the handle; G. Place the end cap and seal cover on the corresponding positions of the handheld handle and the seal outer tube respectively and tighten them to complete the installation.

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