Double-acting side burr beating structure of stamping die

Abstract

The invention relates to the technical field of stamping die structures, in particular to a stamping die double-acting side burr beating structure which comprises a double-acting driving part and a double-acting moving assembly which are arranged in a stamping die, the double-acting driving part is arranged below an upper die of the stamping die, and the double-acting moving assembly is arranged above a lower die of the stamping die. The double-acting driving piece and the double-acting moving assembly are used for removing burrs on the side face of the part product; the first forming male is in contact with a pressing material, namely a part product, in sequence through the pneumatic assembly, then the second forming male is in contact with the pressing material through the pneumatic assembly, and the lower sliding block and the sliding block base are promoted to drive the part product located between the first forming male and the second forming male to conduct burr beating treatment. And meanwhile, the working efficiency of the double-acting side burr beating structure of the stamping die is high, material machining is stable, simple maintenance of the die can be facilitated, and the cost can be conveniently controlled.

Description

Technical Field

[0001] The invention relates to the technical field of stamping die structures, and in particular to a double-action side-slapping burr structure of a stamping die. Background Art

[0002] Usually, for precision parts, burrs are not allowed on the mounting surface of the parts during progressive die stamping processing. However, many parts are difficult to meet the burr-free requirements during the arrangement of the progressive die stamping process: Since the design of the progressive die must consider high material utilization and small step size, but the mounting surface area of ​​some products requires zero burrs, it is necessary to implement the burr removal process; since the zero burr surface of some parts is on the side wall of the product, for example, the mounting surface of the door lock parts requires zero burrs, so relatively speaking, the processing is difficult and the burrs need to be removed after forming, bending and punching.

[0003] In the prior art, for example, the patent with publication number CN217990645U discloses a novel burr-free continuous blanking die, comprising: a lower die and an upper die arranged above the lower die and capable of being raised and lowered, a half-shearing station and a burr-beating station distributed along the advancing direction of the material strip are arranged between the upper die and the lower die, and half-shearing and burr-beating are performed simultaneously when the upper die descends; wherein, the half-shearing station comprises: a half-shearing mechanism for half-shearing parts from the material strip; and a pushing mechanism for pushing the parts into the notch on the material strip after the half-shearing is completed. Although the two-step processes of stamping and burr-beating of the parts of the patent only require one set of dies, and the two-step processes can be performed simultaneously, there is still a problem that it is difficult to perform burr-beating on the side of the door lock during the stamping process, thereby affecting the installation requirements of the mounting surface of the door lock parts. Therefore, the prior art still has the problem that it is difficult to perform synchronous burr-beating on the side of the parts during the stamping process. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a double-action side deburring structure of a stamping die to solve the problem that it is difficult to perform synchronous deburring treatment on the side surfaces of parts during the stamping process.

[0005] Based on the above purpose, the present invention provides a double-action side burr-shooting structure of a stamping die, comprising: a double-action driving member and a double-action motion assembly arranged in the stamping die, the double-action driving member is arranged below the upper die of the stamping die, the double-action motion assembly is arranged above the lower die of the stamping die, the double-action driving member and the double-action motion assembly are used to shoot burrs on the side of the part product; the double-action motion assembly comprises: a lower slider and a slider seat which are laterally slidably connected above the lower die, the lower slider and the slider seat are arranged in a linear position, a first molding male is detachably installed at one end of the upper middle portion of the lower slider, and the upper middle portion of the slider seat is close to the first molding male. A second molding pin is detachably mounted on one end of the lower slider, and the second molding pin is aligned with the adjacent side of the first molding pin. The double-action motion assembly also includes: a pneumatic assembly arranged in the lower mold cavity, and the pneumatic assembly sequentially adjusts the movement of the lower slider and the slider seat; the double-action driving member includes: a first upper driving block and a second upper driving block fixedly mounted below the upper mold, the first upper driving block is located above the slider seat, and the second upper driving block is located above the lower slider. When the mold is closed, the upper mold drives the first upper driving block and the second upper driving block to move downward synchronously to drive the first molding pin and the second molding pin to remove burrs on the parts product.

[0006] Preferably, second guide fixing blocks are slidably installed on both sides of the periphery of the lower slider, and the two second guide fixing blocks are fixedly installed on the lower mold. First guide fixing blocks are slidably installed on both sides of the periphery of the slider seat, and the two first guide fixing blocks are fixedly installed on the lower mold.

[0007] Preferably, an anti-side seat is fixedly installed above the lower mold near the slider seat, and a slider insert is detachably installed on one side of the slider seat near the anti-side seat. A chamfer matching the bottom end of the first upper driving block is provided at one end of the top of the slider insert. During the downward movement of the first upper driving block, the slider seat is pushed to move toward one side of the lower slider through the slider insert.

[0008] Preferably, a second wear-resistant plate is detachably mounted on a side of the anti-side seat close to the slider seat, and the second wear-resistant plate is arranged parallel to the slider insert.

[0009] Preferably, guide blocks adapted to the second upper driving block extend from both sides of the upper middle portion of the lower sliding block, and a section is provided on one side of the guide block, which is adapted to the bottom end of the second upper driving block. During the downward movement of the second upper driving block, the section pushes the guide block to move laterally through the section to drive the lower sliding block to move toward one side of the sliding block seat.

[0010] Preferably, a first wear-resistant plate slidably connected to the lower slider and the slider seat is arranged above the lower die, and the first wear-resistant plate is fixedly mounted on the lower die.

[0011] Preferably, the pneumatic assembly includes: two nitrogen springs fixedly installed in the lower model cavity, the output ends of the two nitrogen springs are respectively fixedly installed with a connecting block and a positioning block, the top of the connecting block is fixedly connected to the lower slider, the top of the positioning block is fixedly connected to the slider seat, and the nitrogen spring first drives the connecting block to move and then drives the positioning block to move.

[0012] Preferably, a bracket is fixedly installed on the upper side of the lower mold, and a sensing device is detachably installed on the bracket. A sensing pin is fixedly installed on the side of the lower slider close to the sensing device, and the sensing pin is connected to the sensing device through a photoelectric signal.

[0013] Preferably, an installation groove is provided on one side of the first molding male close to the second molding male, and sliding grooves are provided on both sides of the installation groove, and protrusions are slidably connected in the two sliding grooves, and pressure plates are fixedly installed on adjacent sides of the two protrusions, and one side of the pressure plate is arranged in a plane, and multiple sleeves are fixedly installed on one side of the interior of the installation groove, and a solid block is slidably inserted in the sleeve, and one end of the solid block is affixed to one side of the pressure plate, and a connecting pipe is fixedly installed between the multiple sleeves, and the connecting pipe is communicated with the interior of the sleeve, and a sealing gasket is provided at one end of the solid block located inside the sleeve, and a liquid inlet pipe is fixedly inserted on one side of the outer periphery of the first molding male, and one end of the liquid inlet pipe penetrates into the first molding male and is communicated with the sleeve, and a liquid extraction pipe is fixedly inserted on the other side of the outer periphery of the first molding male, and one end of the liquid extraction pipe penetrates into the first molding male and is communicated with the sleeve, and an electromagnetic one-way valve is fixedly installed on one end of the liquid inlet pipe and one end of the liquid extraction pipe.

[0014] The beneficial effects of the present invention are as follows: the upper die of the progressive die drives the first upper driving block and the second upper driving block to move downward synchronously, thereby extruding the slider seat and the lower slider located on the lower die; during the extrusion process, the first forming pin is contacted with the pressing material, i.e., the part product, in sequence with the help of the pneumatic component, and then the second forming pin is contacted with the pressing material with the help of the pneumatic component, so that the lower slider and the slider seat drive the part product between the first forming pin and the second forming pin to perform burr removal processing, thereby completing the burr removal processing on the side of the part product, solving the problem that it is difficult to perform synchronous burr removal processing on the side of the part during the stamping process; at the same time, the double-action side burr removal structure of the stamping die has high working efficiency and stable high-pressure material processing, and can facilitate simple maintenance of the die and control costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the top view of the double-action motion assembly of the present invention; Figure 3 It is a left-side structural schematic diagram of the present invention; Figure 4 It is a bottom view structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the position structure of the induction pin of the present invention; Figure 6 It is a right view structural schematic diagram of the present invention; Figure 7 This is a schematic cross-sectional view of the first molding structure of the present invention; Figure 8 This is a schematic diagram of the solid block distribution position structure of the present invention.

[0017] The markings in the figure are: 1. Parts; 2. Lower slider; 3. First wear-resistant plate; 4. Slider insert; 5. Nitrogen spring; 6. Second wear-resistant plate; 7. First upper drive block; 8. First guide fixing block; 9. Second guide fixing block; 10. Second upper drive block; 11. Anti-side seat; 12. Connecting block; 13. Induction device; 14. Bracket; 15. First forming male; 16. Second forming male; 17. Induction pin; 20. Slider seat; 21. Guide block; 22. Positioning block; 23. Mounting groove; 24. Slide groove; 25. Bump; 26. Pressure plate; 27. Sleeve; 28. Solid block; 29. ​​Connecting pipe; 30. Liquid inlet pipe; 31. Liquid extraction pipe; 32. Solenoid one-way valve. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. Example

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a double-action side burr-shooting structure of a stamping die comprises: a double-action driving member and a double-action motion assembly arranged in the stamping die, the double-action driving member is arranged below the upper die of the stamping die, the double-action motion assembly is arranged above the lower die of the stamping die, the double-action driving member and the double-action motion assembly are used to shoot burrs on the side of a part product 1; the double-action motion assembly comprises: a lower slider 2 and a slider seat 20 which are laterally slidably connected to the upper part of the lower die, the lower slider 2 and the slider seat 20 are arranged in a linear position, a first molding male 15 is detachably installed at one end of the upper middle part of the lower slider 2, and a first molding male 15 is detachably installed at one end of the upper middle part of the slider seat 20 close to the lower slider 2 A second molding pin 16, the second molding pin 16 is aligned with the adjacent side of the first molding pin 15, the double-action motion assembly also includes: a pneumatic assembly arranged in the lower mold cavity, the pneumatic assembly sequentially adjusts the movement of the lower slider 2 and the slider seat 20; the double-action driving member includes: a first upper driving block 7 and a second upper driving block 10 fixedly installed below the upper mold by bolts, the first upper driving block 7 is located above the slider seat 20, and the second upper driving block 10 is located above the lower slider 2. When the mold is closed, the upper mold drives the first upper driving block 7 and the second upper driving block 10 to move downward synchronously to drive the first molding pin 15 and the second molding pin 16 to remove burrs on the part product 1.

[0020] Among them, when the progressive die is stamping the product, for example, when stamping the component product 1 of a car door lock, the side of the component product 1 needs to be deburred. During the processing, the first upper drive block 7 and the second upper drive block 10 are driven downward synchronously by the mold, so as to extrude the slider seat 20 and the lower slider 2 located on the lower die. During the extrusion process, the first molding pin 15 is contacted with the pressing material, that is, the component product 1, with the help of the pneumatic component, and then the second molding pin 16 is contacted with the pressing material with the help of the pneumatic component, so that the lower slider 2 and the slider seat 20 drive the component product 1 between the first molding pin 15 and the second molding pin 16 to perform deburring treatment, thereby completing the deburring processing on the side of the component product 1.

[0021] Furthermore, in order to limit the stability of the lower slider 2 and the slider seat 20 during the lateral sliding process, second guide fixing blocks 9 are slidably installed on both sides of the outer periphery of the lower slider 2, and the two second guide fixing blocks 9 are fixedly installed on the lower mold by bolts, and first guide fixing blocks 8 are slidably installed on both sides of the outer periphery of the slider seat 20, and the two first guide fixing blocks 8 are fixedly installed on the lower mold by bolts. The guiding and limiting function of the first guide fixing block 8 and the second guide fixing block 9 can effectively improve the stability of the lower slider 2 and the slider seat 20 during the movement on the lower mold, thereby reducing the operating error during the processing process.

[0022] Furthermore, in order to guide the first upper driving block 7 to effectively drive the slider seat 20 to move to implement extrusion during the downward pressing process, an anti-side seat 11 is fixedly installed above the lower mold near the slider seat 20 by bolts, and a slider insert 4 is detachably installed on the side of the slider seat 20 close to the anti-side seat 11. A chamfer matching the bottom end of the first upper driving block 7 is opened at one end of the top of the slider insert 4. During the downward movement of the first upper driving block 7, the slider seat 20 is pushed to move toward one side of the lower slider 2 through the slider insert 4; a second wear-resistant plate 6 is detachably installed on the side of the anti-side seat 11 close to the slider seat 20, and the second wear-resistant plate 6 is arranged parallel to the slider insert 4. The anti-side seat 11 can use the lower mold to offset the lateral force, and at the same time, the wear resistance of the anti-side seat 11 can be improved with the help of the second wear-resistant plate 6, thereby improving the service life.

[0023] Furthermore, in order to guide the second upper driving block 10 to effectively drive the lower slider 2 to move to implement extrusion during the downward pressing process, guide blocks 21 adapted to the second upper driving block 10 are extended on both sides of the upper middle part of the lower slider 2. A cut surface is opened on one side of the guide block 21, and the cut surface is adapted to the bottom end of the second upper driving block 10. During the downward movement of the second upper driving block 10, the cut surface pushes the guide block 21 to move horizontally to drive the lower slider 2 to move toward one side of the slider seat 20. The cut surface on the guide block 21 can be used to transfer the vertical pressure applied by the second upper driving block 10 to the lower slider 2. It is converted into a lateral driving force, thereby prompting the lower slider 2 to move laterally on the lower mold to complete the lateral pressure on the part product 1, and then the part product 1 is subjected to lateral burr removal processing through the first molding pin 15 and the second molding pin 16; a first wear-resistant plate 3 is provided above the lower mold, which is slidably connected to the lower slider 2 and the slider seat 20, and the first wear-resistant plate 3 is fixedly installed on the lower mold by bolts. During the movement of the lower slider 2 and the slider seat 20, the first wear-resistant plate 3 can effectively improve the wear-resistant protection effect, thereby further extending the service life of the lower slider 2 and the slider seat 20.

[0024] Furthermore, in order to facilitate the control of the movement of the lower slider 2 and the slider seat 20, the pneumatic assembly includes: two nitrogen springs 5 ​​fixedly installed in the lower model cavity by bolts, the output ends of the two nitrogen springs 5 ​​are respectively fixedly installed with a connecting block 12 and a positioning block 22 by bolts, the top of the connecting block 12 is fixedly connected to the lower slider 2 by bolts, and the top of the positioning block 22 is fixedly connected to the slider seat 20 by bolts. The nitrogen spring 5 first drives the connecting block 12 to move and then drives the positioning block 22 to move. Since the lower slider 2 and the slider seat 20 have a sequence in the process of contacting the part product 1, it is necessary to let the first molding male 15 contact the pressing material first, that is, the part product 1, and then the second molding male 16 on the opposite side completes the process of removing the burrs through the driving force of the nitrogen spring 5.

[0025] Furthermore, in order to facilitate the detection of the moving state of the lower slider 2, a bracket 14 is fixedly installed on the upper side of the lower mold by bolts, and the bracket 14 is detachably installed with a sensing device 13. A sensing pin 17 is fixedly installed on the side of the lower slider 2 close to the sensing device 13 by bolts, and the sensing pin 17 is connected to the sensing device 13 through a photoelectric signal; the above-mentioned entire processing process requires the sensing pin 17 to project rays onto the sensing device 13 during the movement of the lower slider 2, and the sensing device 13 will take action after receiving the signal, such as stopping or starting, and the sensing device 13 can be fixed on the bracket 14 at the same time, and the height and movement distance of the sensing device 13 can be adjusted through the waist round hole of the bracket 14, so that it can adapt to various stroke movements of the lower slider 2, and effectively cope with the side burr processing effect under different pressing specifications. Example

[0026] like Figure 7 and Figure 8As shown, the difference from the previous embodiment is that a mounting groove 23 is provided on the side of the first forming male 15 close to the second forming male 16, and the mounting groove 23 is a virtual cubic structure. Slide grooves 24 are provided on both sides of the mounting groove 23, and protrusions 25 are slidably connected in the two slide grooves 24. A pressing plate 26 is fixedly installed on the adjacent sides of the two protrusions 25 by bolts, and one side of the pressing plate 26 is a plane setting, and one side of the pressing plate 26 blocks the opening of the mounting groove 23, so that the side of the first forming male 15 close to the second forming male 16 constitutes a complete plane, and a plurality of sleeves 27 are fixedly installed on one side of the interior of the mounting groove 23 by bolts. 7 is a long cylindrical structure with one end open, and a solid block 28 is slidably inserted in the sleeve 27. The side of the solid block 28 close to the pressure plate 26 is a hemispherical structure, and one end of the solid block 28 located in the sleeve 27 is a cylindrical structure. One end of the solid block 28 is attached to one side of the pressure plate 26, so that the impact force of the solid block 28 can be effectively transmitted to the pressure plate 26, so that the pressure plate 26 can transmit the impact force received to the first forming male 15, so as to further cooperate with the second forming male 16 to implement burr processing on the component product 1. In order to facilitate the provision of driving force to the solid block 28, a plurality of sleeves 27 are fixedly installed by bolts. A connecting pipe 29 is connected to the inside of the sleeve 27. A sealing gasket is provided at one end of the solid block 28 inside the sleeve 27. A liquid inlet pipe 30 is fixedly connected to one side of the outer periphery of the first molded male 15. One end of the liquid inlet pipe 30 penetrates into the first molded male 15 and communicates with the sleeve 27. The liquid inlet pipe 30 can be connected to an external drainage pipe to fill the sleeve 27 with liquid to increase the pressure strength of the solid block 28. A liquid extraction pipe 31 is fixedly connected to the other side of the outer periphery of the first molded male 15. One end of the liquid extraction pipe 31 penetrates into the first molded male 15 and communicates with the sleeve 27. The liquid extraction pipe 31 can be connected to external equipment such as a water pump. In order to quickly flush out the liquid inside the sleeve 27 and form a negative pressure in the sleeve 27, each solid block 28 is detached from the side of the pressure plate 26, and then liquid can be filled into the sleeve 27 again through the liquid inlet pipe 30, and the solid block 28 is quickly impacted onto the pressure plate 26 by hydraulic action to further implement the effect of applying pressure to remove burrs. One end of the liquid inlet pipe 30 and one end of the liquid extraction pipe 31 are both fixed with an electromagnetic one-way valve 32 by bolts. The electromagnetic one-way valve 32 can limit the hydraulic pressure in the sleeve 27, so that the pressure plate 26 can form a complete integrated structure with the first molding male 15, which is convenient for users to switch and use.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A double-action side-shooting burr structure for a stamping die, characterized in that: include: A double-acting drive member and a double-acting motion assembly are arranged in a stamping die, wherein the double-acting drive member is arranged below the upper die of the stamping die, and the double-acting motion assembly is arranged above the lower die of the stamping die, and the double-acting drive member and the double-acting motion assembly are used to remove burrs from the side of a part product (1); the double-acting motion assembly comprises: a lower slider (2) and a slider seat (20) which are laterally slidably connected to the upper side of the lower die, wherein the lower slider (2) and the slider seat (20) are arranged in a linear position, a first forming male (15) is detachably mounted on one end of the upper middle portion of the lower slider (2), and a second forming male (16) is detachably mounted on one end of the upper middle portion of the slider seat (20) close to the lower slider (2), and the second forming male (16) is detachably mounted on one end of the upper middle portion of the slider seat (20) close to the lower slider (2). The male (16) is aligned with the adjacent side of the first molding male (15), and the double-action motion component also includes: a pneumatic component arranged in the lower mold cavity, and the pneumatic component sequentially adjusts the movement of the lower slider (2) and the movement of the slider seat (20); the double-action driving member includes: a first upper driving block (7) and a second upper driving block (10) fixedly installed below the upper mold, the first upper driving block (7) is located above the slider seat (20), and the second upper driving block (10) is located above the lower slider (2). When the mold is closed, the upper mold drives the first upper driving block (7) and the second upper driving block (10) to move downward synchronously to drive the first molding male (15) and the second molding male (16) to remove burrs from the component product (1).

2. A stamping die double-action side burr structure according to claim 1, characterized in that: Second guide fixing blocks (9) are slidably mounted on both sides of the outer periphery of the lower slider (2), and the two second guide fixing blocks (9) are fixedly mounted on the lower die. First guide fixing blocks (8) are slidably mounted on both sides of the outer periphery of the slider seat (20), and the two first guide fixing blocks (8) are fixedly mounted on the lower die.

3. A stamping die double-action side burr structure according to claim 1, characterized in that: An anti-side seat (11) is fixedly installed above the lower mold near the slider seat (20), and a slider insert (4) is detachably installed on one side of the slider seat (20) near the anti-side seat (11). A chamfer matching the bottom end of the first upper driving block (7) is provided at one end of the top of the slider insert (4). During the downward movement of the first upper driving block (7), the slider seat (20) is pushed by the slider insert (4) to move toward one side of the lower slider (2).

4. A stamping die double-action side burr structure according to claim 3, characterized in that: A second wear-resistant plate (6) is detachably mounted on one side of the anti-side seat (11) close to the slider seat (20), and the second wear-resistant plate (6) is arranged parallel to the slider insert (4).

5. The double-action side burr structure of a stamping die according to claim 1, characterized in that: Guide blocks (21) adapted to the second upper driving block (10) are extended from both sides of the upper middle portion of the lower sliding block (2); a cut surface is provided on one side of the guide block (21), the cut surface being adapted to the bottom end of the second upper driving block (10); and during the downward movement of the second upper driving block (10), the cut surface pushes the guide block (21) to move laterally, thereby driving the lower sliding block (2) to move toward one side of the sliding block seat (20).

6. A stamping die double-action side burr structure according to claim 1, characterized in that: A first wear-resistant plate (3) is provided above the lower die and is slidably connected to the lower slider (2) and the slider seat (20); the first wear-resistant plate (3) is fixedly mounted on the lower die.

7. A stamping die double-action side burr structure according to claim 1, characterized in that: The pneumatic assembly comprises: two nitrogen springs (5) fixedly mounted in the lower mold cavity; the output ends of the two nitrogen springs (5) are respectively fixedly mounted with a connecting block (12) and a positioning block (22); the top of the connecting block (12) is fixedly connected to the lower slider (2); the top of the positioning block (22) is fixedly connected to the slider seat (20); the nitrogen spring (5) first drives the connecting block (12) to move and then drives the positioning block (22) to move.

8. The double-action side burr structure of a stamping die according to claim 1, characterized in that: A bracket (14) is fixedly mounted on the upper side of the lower die, and a sensing device (13) is detachably mounted on the bracket (14). A sensing pin (17) is fixedly mounted on a side of the lower slider (2) close to the sensing device (13), and the sensing pin (17) is connected to the sensing device (13) via a photoelectric signal.

9. A stamping die double-action side burr structure according to claim 1, characterized in that: A mounting groove (23) is provided on one side of the first forming male (15) close to the second forming male (16), and slide grooves (24) are provided on both sides of the mounting groove (23). Both slide grooves (24) are slidably connected with protrusions (25), and a pressure plate (26) is fixedly installed on the adjacent sides of the two protrusions (25). One side of the pressure plate (26) is flat, and a plurality of sleeves (27) are fixedly installed on one side of the mounting groove (23). A solid block (28) is slidably inserted in the sleeve (27), and one end of the solid block (28) is attached to one side of the pressure plate (26). A connecting pipe (26) is fixedly installed between the plurality of sleeves (27). 9), the connecting pipe (29) is connected to the interior of the sleeve (27), a sealing gasket is provided at one end of the solid block (28) located inside the sleeve (27), a liquid inlet pipe (30) is fixedly connected to one side of the outer periphery of the first molded male (15), one end of the liquid inlet pipe (30) penetrates into the first molded male (15) and is connected to the sleeve (27), a liquid extraction pipe (31) is fixedly connected to the other side of the outer periphery of the first molded male (15), one end of the liquid extraction pipe (31) penetrates into the first molded male (15) and is connected to the sleeve (27), and an electromagnetic one-way valve (32) is fixedly installed at one end of the liquid inlet pipe (30) and one end of the liquid extraction pipe (31).

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