Conventional rubber sleeve piston explosion-proof cover structure

Abstract

The invention relates to the field of explosion prevention in dispensing production, in particular to a conventional rubber barrel piston explosion-proof cover structure which comprises an explosion-proof cover and a pressing piston, the pressing piston is slidably mounted in the explosion-proof cover, a movable disc, a sealing assembly and a pressure relief assembly are mounted in the pressing piston, the movable disc is mounted in the pressing piston, the sealing assembly comprises two sets of sealing arc covers, and the sealing arc covers are arranged in the sealing arc covers. And the pressure relief assembly comprises a pressure relief ring and pressure relief holes, the pressure relief ring is slidably installed in the pressing piston and seals the multiple groups of pressure relief holes in the wall surface of the pressing piston, after the air pressure in the pressing piston exceeds a preset value, the movable disc is stressed to slide by a preset stroke, the two groups of sealing arc covers are unlocked to slide close to each other, and the pressure relief ring is locked to seal the pressure relief holes in the wall surface of the pressing piston. After the bottom of the air guide pipe in the pressing piston is sealed, the pressure relief ring is unlocked to slide to enable the multiple groups of pressure relief holes to leak out to realize pressure relief, so that the problem that glue in the glue barrel is possibly splashed during pressure relief operation and enters the pneumatic connector to pollute or block the pneumatic connector is solved.

Description

Technical Field

[0001] The invention relates to the field of explosion-proof glue dispensing production, in particular to a conventional glue cylinder piston explosion-proof cover structure. Background Art

[0002] In the dispensing industry, the explosion-proof cover structure of the rubber cylinder piston is mainly used to fix the rubber cylinder and provide a closed environment, so that the glue and other fluids in the rubber cylinder can be continuously and stably supplied under the control of external air pressure, which is crucial to protecting the safety of workers and stable production of equipment.

[0003] In actual production, since the heating temperature of the rubber cylinder is high and the internal wall of the tube is subjected to a certain air pressure, when the dispensing production is abnormal, the pressure inside the rubber cylinder may increase abnormally. In order to avoid the risk of explosion of the dispensing cylinder, technicians need to design an explosion-proof cover structure to provide explosion-proof protection for the upper opening of the dispensing cylinder.

[0004] When the explosion-proof cover structure used in the existing dispensing cylinder is in use, in order to avoid the situation where the pressure in the installed dispensing cylinder exceeds the critical value and causes the cylinder to rupture, a safety pressure value is often set. When the pressure in the dispensing cylinder exceeds the safety pressure value, the pneumatic joint connected to the explosion-proof cover structure is controlled to be closed, and the explosion-proof cover structure is operated by personnel to perform pressure relief operations. Although the above method can complete the explosion-proof protection of conventional rubber cartridges, when the pressure relief operation is actually performed, the glue in the rubber cartridge may splash, and the splashed glue will enter the pneumatic joint, causing pollution or blockage to the pneumatic joint. Summary of the invention

[0005] The object of the present invention is to provide a conventional rubber cylinder piston explosion-proof cover structure for solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides a conventional rubber cylinder piston explosion-proof cover structure, including a structure installed on the upper side of a rubber cylinder heating module, characterized in that it includes an explosion-proof cover and a pressing piston, the explosion-proof cover is fixedly installed on the upper end of the rubber cylinder heating module, the pressing piston is slidably installed in the explosion-proof cover, and is linearly moved by a driving member installed on the explosion-proof cover to seal and fix the rubber cylinder placed on the upper edge of the rubber cylinder in the rubber cylinder heating module, an air guide tube is coaxially fixedly installed in the pressing piston, one end of which extends out of the upper end of the explosion-proof cover and is connected to a pneumatic quick-connect joint, and a movable disk, a sealing assembly and a pressure relief assembly are installed in the pressing piston;

[0007] The movable disk is seal-slidably mounted in the pressing piston, and a connecting hole is provided on the movable disk for seal-slidably mounting with the air guide pipe. The movable disk is elastically mounted in the pressing piston through a No. 1 elastic member, and a set of limit plates are respectively mounted on both sides of the bottom end surface of the movable disk. When the air pressure in the pressing piston increases, the movable disk is forced to slide;

[0008] The sealing assembly includes two groups of sealing arc covers, which are slidably mounted on a fixed bracket at the bottom of the pressing piston, and the distal ends of the two groups of sealing arc covers are elastically connected to the two ends of the fixed bracket through a No. 2 elastic member, respectively. The elastic force of the two groups of No. 2 elastic members supports the two groups of sealing arc covers to abut against each other, thereby sealing the bottom of the air guide pipe. The two groups of sealing arc covers are locked and connected with the two groups of limit plates through a No. 1 locking assembly, and the bottom of the two groups of sealing arc covers is provided with a power assembly for driving them to move away from each other in a mirror image;

[0009] The pressure relief assembly includes a pressure relief ring and pressure relief holes, and multiple groups of pressure relief holes are evenly opened on the wall surface of the pressing piston. The pressure relief ring is slidably installed in the pressing piston and seals the multiple groups of pressure relief holes. The pressure relief ring is elastically connected to the inner wall of the pressing piston through a No. 3 elastic member, and the pressure relief ring is locked and connected with two groups of sealing arc covers through a No. 2 locking assembly;

[0010] When the air pressure in the pressing piston exceeds the preset value, the movable disk is forced to slide the preset stroke, and the No. 1 locking component unlocks the two sets of sealing arc covers to slide close to each other. When the two sets of sealing arc covers are in abutment and contact, the No. 2 locking component unlocks the pressure relief ring to slide, allowing multiple sets of pressure relief holes to leak out to achieve pressure relief.

[0011] As a further solution of the present invention, the explosion-proof cover and the rubber cartridge heating module are fixed by a slot.

[0012] As a further solution of the present invention, a group of guide columns are fixedly installed on both sides of the pressing piston, and the two groups of guide columns are slidably installed in the guide grooves arranged on both sides of the explosion-proof cover.

[0013] As a further solution of the present invention, the driving member is a rotary internal thread sleeve, which is rotatably installed at the installation opening at the upper end of the explosion-proof cover, and the outer wall of the pressing piston is provided with an external thread for threaded connection with the rotary internal thread sleeve.

[0014] As a further solution of the present invention, the upper end surface of the movable disk is elastically connected to the fixed ring in the pressing piston through a No. 1 elastic member.

[0015] As a further solution of the present invention, the No. 1 locking assembly includes a fixed plate and a movable wedge block, the fixed plate is fixedly mounted on the sealing arc cover, the movable wedge block is slidably mounted on the fixed plate, and is elastically connected to the fixed plate through a No. 4 elastic member, the inclined surface of the movable wedge block is directed toward the inner wall of the pressing piston, and the limiting plate at the bottom of the movable disk can abut against the vertical side of the movable wedge block to limit the movement of the fixed plate and the movable wedge block.

[0016] As a further solution of the present invention, the No. 2 locking assembly includes a locking plate and a fixed wedge block. The locking plate is horizontally slidably installed in a guide groove opened on the fixed plate, and is elastically connected to the fixed plate through a No. 5 elastic member. The fixed wedge block is fixedly installed on the pressure relief ring, with its inclined side facing the upper side of the downward piston. The bottom of the inclined side of the fixed wedge block is provided with a locking groove for inserting the end of the locking plate.

[0017] As a further solution of the present invention, the power assembly includes a pressure plate and two sets of transmission connecting rods, one end of the two sets of transmission connecting rods are respectively hinged on both sides of the pressure plate, and the other end is fixedly mounted on the bottom of the two sets of sealing arc covers in a mirror-like manner.

[0018] As a further solution of the present invention, a limiting ring is provided between the movable disk and the pressure relief ring, and the limiting ring is fixedly mounted on the inner wall of the pressing piston to limit the sliding stroke of the movable disk and the pressure relief ring.

[0019] Compared with the prior art, the present invention improves the design of the pressing piston in the explosion-proof cover, and installs a movable disk, a sealing component and a pressure relief component in the pressing piston, so that when the explosion-proof operation is realized;

[0020] 1. By arranging a slidably mounted movable disk in the pressing piston, when the air pipe is inflated and the rubber cylinder is heated, the pressure in the connection between the pressing piston and the rubber cylinder increases, and the movable disk is acted upon by the pressure to move inward along the axial direction of the pressing piston. When the limit plate at the bottom of the pressing piston moves to the top of the movable wedge block until it is separated from the movable wedge block, the No. 1 locking assembly is unlocked, and the two sets of sealing arc covers move toward the middle through the elastic support of the corresponding No. 2 connecting spring, and after the abutment is completed, the bottom of the air pipe is sealed;

[0021] 2. When the two sets of sealing arc covers move to both sides, the locking plug plate is kept inserted into the locking groove at the bottom of the fixed wedge block under the elastic force of the No. 5 connecting spring. When the sealing arc cover completes the sealing, the corresponding locking plug plate is separated from the locking groove. At this time, the pressure relief ring can be pressed downward by the elastic force of the No. 3 connecting spring to move the outside of the piston and leak the pressure relief hole to realize the pressure relief operation;

[0022] 3. The present invention provides a power assembly at the bottom of the sealing arc cover, and designs movable wedges and fixed wedges in the No. 1 locking assembly and the No. 2 locking assembly so that the operator can manually reset the present invention after the pressure relief operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The figure is a schematic diagram of the installation of a conventional rubber cylinder piston explosion-proof cover structure in the present invention.

[0024] Figure 2The figure is a schematic structural diagram of a conventional rubber cylinder piston explosion-proof cover structure in the present invention.

[0025] Figure 3 It is an internal schematic diagram of the downward pressing piston in the present invention.

[0026] Figure 4 For the present invention Figure 3 Schematic diagram of the bottom side.

[0027] Figure 5 For the present invention Figure 3 A magnified schematic diagram of center A.

[0028] In the attached figure: 1, rubber cartridge heating module; 2, explosion-proof cover; 201, guide groove; 3, pressing piston; 301, pressure relief hole; 4, rubber cartridge; 5, rotating inner screw sleeve; 6, air guide tube; 7, pneumatic quick connector; 8, guide column; 9, elastic retaining ring; 10, fixing ring; 11, movable plate; 1101, limiting rod; 1102, limiting plate; 12, pressure spring; 13, limiting ring; 14, pressure relief ring; 15, sealing Arc sealing cover; 16. Fixed bracket; 17. Power assembly; 1701. Pressure plate; 1702. Transmission connecting rod; 18. Locking assembly No. 1; 1801. Fixed plate; 1802. Movable wedge; 1803. Connecting spring No. 4; 19. Locking assembly No. 2; 1901. Locking plug plate; 1902. Connecting spring No. 5; 1903. Fixed wedge; 20. Connecting spring No. 2; 21. Connecting spring No. 3. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0030] like Figures 1 to 3 As shown, in an embodiment of the present invention, a conventional rubber cylinder piston explosion-proof cover structure includes a structure installed on the upper side of a rubber cylinder heating module 1, characterized in that it includes an explosion-proof cover 2 and a pressing piston 3, the explosion-proof cover 2 is fixedly installed on the upper end of the rubber cylinder heating module 1, the pressing piston 3 is slidably installed in the explosion-proof cover 2, and is linearly moved by a driving member installed on the explosion-proof cover 2, and the rubber cylinder 4 placed in the rubber cylinder heating module 1 is sealed and fixed, and an air guide tube 6 is coaxially fixedly installed in the pressing piston 3, one end of which extends out of the upper end of the explosion-proof cover 2 and is connected to a pneumatic quick-connect joint 7, and a movable disk 11, a sealing component and a pressure relief component are installed in the pressing piston 3;

[0031] The movable disk 11 is sealed and slidably installed in the pressing piston 3, and a connecting hole for sealing and sliding installation with the air guide pipe 6 is provided on the movable disk 11. The movable disk 11 is elastically installed in the pressing piston 3 through a No. 1 elastic member. A set of limit plates 1102 are respectively installed on both sides of the bottom end surface of the movable disk 11. When the air pressure in the pressing piston 3 increases, the movable disk 11 is forced to slide;

[0032] The sealing assembly includes two groups of sealing arc covers 15, which are slidably mounted on a fixed bracket 16 at the bottom of the pressing piston 3. The distal ends of the two groups of sealing arc covers 15 are elastically connected to the two ends of the fixed bracket 16 through a No. 2 elastic member, respectively. The elastic force of the two groups of No. 2 elastic members supports the two groups of sealing arc covers 15 to abut against each other, thereby sealing the bottom of the air guide pipe 6. The two groups of sealing arc covers 15 are locked and connected with the two groups of limit plates 1102 through a No. 1 locking assembly 18. The bottom of the two groups of sealing arc covers 15 is provided with a power assembly 17 for driving the mirror image thereof to move away.

[0033] The pressure relief assembly includes a pressure relief ring 14 and pressure relief holes 301. A plurality of groups of pressure relief holes 301 are evenly arranged on the wall surface of the pressing piston 3. The pressure relief ring 14 is slidably installed in the pressing piston 3 and seals the plurality of groups of pressure relief holes 301. The pressure relief ring 14 is elastically connected to the inner wall of the pressing piston 3 through a No. 3 elastic member. The pressure relief ring 14 is locked and connected to two groups of sealing arc covers 15 through a No. 2 locking assembly 19.

[0034] When the air pressure in the pressing piston 3 exceeds a preset value, the movable disk 11 is forced to slide a preset stroke, and the first locking assembly 18 unlocks the two sets of sealing arc covers 15 to slide close to each other. When the two sets of sealing arc covers 15 are in contact, the second locking assembly 19 unlocks the pressure relief ring 14 to slide, and the multiple sets of pressure relief holes 301 leak out to achieve pressure relief;

[0035] Specifically, in the present invention, when performing explosion-proof installation of the rubber cylinder 4, after placing the rubber cylinder 4 in the rubber cylinder heating module 1, the explosion-proof cover 2 is fixed on the top of the rubber cylinder heating module 1, and the driving member is controlled to drive the pressing piston 3 to slide down linearly, and the bottom end face of the pressing piston 3 is pressed and fixed to the upper end of the rubber cylinder 4. In the present invention, an elastic retaining ring 9 and a gasket are arranged between the rubber cylinder 4 and the rubber cylinder heating module 1, and the elastic retaining ring 9 and the gasket assist the pressing piston 3 to seal and press the port of the rubber cylinder 4;

[0036] Furthermore, in the present invention, a slidably mounted movable disk 11 is provided in the pressing piston 3. When the air duct 6 is inflated and the rubber cylinder 4 is heated, the pressure connecting the pressing piston 3 and the rubber cylinder 4 increases, and the movable disk 11 is acted upon by the pressure and moves along the axial direction of the pressing piston 3. The present invention provides a No. 1 locking assembly 18 and a No. 2 locking assembly 19, and the corresponding two groups of sealing arc covers 15 are transmission-connected with the movable disk 11, and the sealing arc covers 15 are transmission-connected with the pressure relief ring 14, so that after the air pressure in the pressing piston 3 exceeds a preset value, the movable disk 11 moves and cooperates with the No. 1 locking assembly 18 to unlock the two groups of sealing arc covers 15 and slide them close to each other, thereby sealing the bottom of the air duct 6 in the pressing piston 3. When the two groups of sealing arc covers 15 move to the position, the No. 2 locking assembly 19 unlocks the pressure relief ring 14 to slide and leak multiple groups of pressure relief holes 301 to achieve pressure relief, thereby achieving the operation of first sealing the bottom of the air duct 6 and then releasing the pressure during the pressure relief operation.

[0037] like Figure 1 and Figure 2 As shown, in the embodiment of the present invention, the explosion-proof cover 2 and the rubber cartridge heating module 1 are fixed by a slot. When the present invention is installed, the explosion-proof cover 2 can be directly slid into the slot to fix the explosion-proof cover 2, thereby realizing the quick loading and unloading operation of the present invention. Of course, in actual design, the explosion-proof cover 2 can also be preferably installed with other structures with quick loading and unloading capabilities, such as a latch fixing method, etc.

[0038] like Figure 2 As shown, in the embodiment of the present invention, a group of guide columns 8 are fixedly installed on both sides of the pressing piston 3, and the two groups of guide columns 8 are slidably installed in the guide grooves 201 set on both sides of the explosion-proof cover 2. When the pressing piston 3 is driven downward by the driving member, the two groups of guide columns 8 slide along the corresponding guide grooves 201 to limit the pressing piston 3 to prevent it from rotating during movement;

[0039] Specifically, in the present invention, the driving member is preferably a rotary internal thread sleeve 5, which is rotatably installed at the installation port at the upper end of the explosion-proof cover 2. The outer wall of the pressing piston 3 is provided with an external thread for threaded connection with the rotary internal thread sleeve 5. The operator can directly rotate the rotary internal thread sleeve 5, and the pressing piston 3 is driven to move linearly downward through the threaded transmission between the rotary internal thread sleeve 5 and the outer wall of the pressing piston 3, as well as the guidance of two groups of guide columns 8. Of course, in actual design, the rotary internal thread sleeve 5 and the two groups of guide columns 8 can also be replaced by other structures with linear driving capabilities, such as a screw transmission structure, etc. The present invention does not impose rigid requirements on the selection of the driving member.

[0040] like Figure 3 and Figure 4As shown, in the embodiment of the present invention, the upper end surface of the movable disk 11 is elastically connected to the fixed ring 10 in the pressing piston 3 through a No. 1 elastic member, wherein the No. 1 elastic member is a pressure spring 12, and the pressure spring 12 is wound around the outside of the air guide tube 6. The present invention fixes two groups of limit rods 1101 on the upper end surface of the movable disk 11, and the two groups of limit rods 1101 are slidably installed in the limit through holes opened on the fixed ring 10. When the pressure in the rubber cylinder 4 increases, the air pressure acts on the movable disk 11, driving the movable disk 11 to move, and the pressure spring 12 is deformed. The two groups of limit rods 1101 slide along the limit through holes to guide the movement of the limit disk, thereby improving the stability of the limit disk when moving;

[0041] Furthermore, in order to improve the sealing ability of the movable disk 11 during the sliding process, the present invention provides a plurality of installation grooves for installing sealing rings at the inner ring and the outer ring of the movable disk 11, and the sealing rings at the inner ring and the outer ring are used to ensure the sealing state of the movable disk 11 during sliding, thereby avoiding the problem of air leakage.

[0042] like Figure 3 , Figure 4 as well as Figure 5 As shown, in the embodiment of the present invention, the No. 1 locking assembly 18 includes a fixed plate 1801 and a movable wedge 1802, wherein the fixed plate 1801 is fixedly mounted on the sealing arc cover 15, and the movable wedge 1802 is slidably mounted on the fixed plate 1801 and elastically connected to the fixed plate 1801 through a No. 4 elastic member, and the inclined surface direction of the movable wedge 1802 faces the inner wall direction of the pressing piston 3, and the limiting plate 1102 at the bottom of the movable disk 11 can abut against the vertical surface side of the movable wedge 1802 to limit the movement of the fixed plate 1801 and the movable wedge 1802, wherein the No. 2 elastic member and the No. 4 elastic member correspond to the No. 2 connecting spring 20 and the No. 4 connecting spring 1803;

[0043] In the present invention, when the pressure in the rubber cylinder 4 increases and drives the movable disk 11 to move, when the limit plate 1102 moves to the top of the movable wedge block 1802 and separates from the movable wedge block 1802, the two sets of sealing arc covers 15 move toward the middle through the elastic support of the corresponding No. 2 connecting spring 20, and after the abutment is completed, the bottom of the air guide pipe 6 is sealed;

[0044] Furthermore, in the present invention, when the pressure relief is completed and the sealing arc cover 15 is moved away and reset, the two sets of sealing arc covers 15 can be driven by the power assembly 17 to move away from each other in a mirror image, so that the bottom of the air guide tube 6 leaks out. At the same time, during the movement of the two sets of sealing arc covers 15, the No. 2 connecting spring 20 is in a compressed state, and the No. 1 locking assembly 18 on the sealing arc cover 15 moves close to the limit plate 1102 at the bottom of the movable disk 11. When the No. 1 locking assembly 18 is wrapped in contact with the limit plate 1102, the inclined side of the movable wedge block 1802 is in contact with the limit plate 1102. 02, the bottom of the movable wedge 1802 is pressed and moved downward, at this time, the fourth connecting spring 1803 is in a compressed state, when the bottom of the limit plate 1102 passes over the upper part of the movable wedge 1802, the movable wedge 1802 is supported and reset by the fourth connecting spring 1803, and after the power component 17 is relaxed, the first locking component 18 can automatically abut against the rear side of the limit plate 1102 under the support of the second connecting spring 20, and the sealing arc cover 15 is limited and fixed, thereby realizing the reset of the sealing arc cover 15;

[0045] Among them, the power assembly 17 includes a pressure plate 1701 and two groups of transmission connecting rods 1702. One end of the two groups of transmission connecting rods 1702 are respectively hinged on both sides of the pressure plate 1701, and the other end is fixedly installed at the bottom of the two groups of sealing arc covers 15 in a mirror-like manner. When the two groups of sealing arc covers 15 are driven to move away from each other in a mirror-like manner, the pressure plate 1701 can be pressed to move in the inner direction of the downward pressing piston 3, and the two groups of transmission connecting rods 1702 are rotated to drive the two groups of sealing arc covers 15 to move to both sides.

[0046] like Figure 3 , Figure 4 as well as Figure 5 As shown, the second locking assembly 19 includes a locking plug plate 1901 and a fixed wedge block 1903. The locking plug plate 1901 is horizontally slidably installed in the guide groove 201 provided on the fixed plate 1801, and is elastically connected to the fixed plate 1801 through a fifth elastic member. The fixed wedge block 1903 is fixedly installed on the pressure relief ring 14, with its inclined side facing the upper side of the downward piston 3. The bottom of the inclined side of the fixed wedge block 1903 is provided with a locking groove for the end of the locking plug plate 1901 to be inserted, wherein the preferred fifth elastic member and the third elastic member correspond to the fifth connecting spring 1902 and the third connecting spring 21;

[0047] In the present invention, when the two sets of sealing arc covers 15 move to both sides, the locking plug plate 1901 is subjected to the elastic force of the No. 5 connecting spring 1902, and remains inserted into the locking groove at the bottom of the fixed wedge block 1903, so as to prevent the pressure relief ring 14 from releasing pressure before the sealing arc cover 15 completes the sealing of the bottom of the air guide pipe 6. When the sealing arc cover 15 completes the sealing, the corresponding locking plug plate 1901 is separated from the locking groove. At this time, the pressure relief ring 14 can be pressed downward by the elastic force of the No. 3 connecting spring 21 to move outside the piston 3 and leak the pressure relief hole 301.

[0048] In the present invention, after the sealing arc cover 15 is reset, the sealing arc cover 15 is mirror-detached and close to the inner wall of the downward piston 3. At this time, the pressure relief ring 14 can be pushed to move in the inner direction of the downward piston 3. At this time, the No. 3 connecting spring 21 is in a compressed state, and the inclined surface of the fixed wedge block 1903 on the pressure relief ring 14 contacts the end of the locking plug plate 1901 elastically installed on the fixed plate 1801, and squeezes the locking plug plate 1901 to insert into the guide groove 201 on the fixed plate 1801. At this time, the No. 5 connecting spring 1902 is in a compressed state. When the pressure relief ring 14 slides up and moves into place, the locking plug plate 1901 is correspondingly inserted into the locking groove at the bottom of the inclined surface side of the fixed wedge block 1903, and the locking plug plate 1901 locks the pressure relief ring 14;

[0049] like Figure 3 and Figure 4 As shown, in an embodiment of the present invention, a limiting ring 13 is arranged between the movable disk 11 and the pressure relief ring 14, and the limiting ring 13 is fixedly mounted on the inner wall of the pressing piston 3, and is used to limit the sliding stroke of the movable disk 11 and the pressure relief ring 14, and the limiting ring 13 can be used to install a No. 3 connecting spring 21.

[0050] In summary, the present invention improves the design of the pressing piston 3 in the explosion-proof cover 2, and installs a movable disk 11, a sealing component and a pressure relief component in the pressing piston 3, so as to realize the explosion-proof operation;

[0051] 1. By arranging a slidably mounted movable disk 11 in the pressing piston 3, when the air pipe 6 is inflated and the rubber cylinder 4 is heated, the pressure in the communication between the pressing piston 3 and the rubber cylinder 4 increases, and the movable disk 11 is acted upon by the pressure and moves inward along the axial direction of the pressing piston 3. When the limit plate 1102 at the bottom of the pressing piston 3 moves to the top of the movable wedge block 1802 until it is separated from the movable wedge block 1802, the No. 1 locking assembly 18 is unlocked, and the two sets of sealing arc covers 15 are supported by the elastic force of the corresponding No. 2 connecting spring 20, move toward the middle, and after the abutment is completed, the bottom of the air pipe 6 is sealed;

[0052] 2. When the two sets of sealing arc covers 15 move to both sides, the locking plug plate 1901 is kept inserted into the locking groove at the bottom of the fixed wedge block 1903 under the elastic force of the No. 5 connecting spring 1902. When the sealing arc cover 15 completes the sealing, the corresponding locking plug plate 1901 is separated from the locking groove. At this time, the pressure relief ring 14 can be pressed downward by the elastic force of the No. 3 connecting spring 21 to move outside the piston 3 and leak the pressure relief hole 301 to achieve pressure relief operation;

[0053] 3. The present invention provides a power assembly 17 at the bottom of the sealing arc cover 15, and designs a movable wedge 1802 and a fixed wedge 1903 in the No. 1 locking assembly 18 and the No. 2 locking assembly 19 so that the operator can manually reset the present invention after the pressure relief operation.

[0054] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A conventional rubber cylinder piston explosion-proof cover structure, characterized in that: The invention comprises an explosion-proof cover (2) and a pressing piston (3), wherein the explosion-proof cover (2) is fixedly mounted on the upper end of the rubber cylinder heating module (1), the pressing piston (3) is slidably mounted in the explosion-proof cover (2), and is linearly moved by a driving member mounted on the explosion-proof cover (2) to seal and fix the rubber cylinder heating module (1) placed on the upper edge of the rubber cylinder (4), an air guide pipe (6) is coaxially fixedly mounted in the pressing piston (3), and a movable disk (11), a sealing component and a pressure relief component are mounted in the pressing piston (3); The movable disk (11) is sealingly and slidably mounted in the pressing piston (3), and a communicating hole is provided on the movable disk for sealingly and slidably mounting with the air guide pipe (6). The movable disk (11) is elastically mounted in the pressing piston (3) through a first elastic member, and a group of limit plates (1102) are respectively mounted on both sides of the bottom end surface of the movable disk (11). When the air pressure in the pressing piston (3) increases, the movable disk (11) is forced to slide; The sealing assembly comprises two groups of sealing arc covers (15), the two groups of sealing arc covers (15) are slidably mounted on a fixed bracket (16) at the bottom of the pressing piston (3), the distal ends of the two groups of sealing arc covers (15) are elastically connected to the two ends of the fixed bracket (16) through a No. 2 elastic member, respectively, and are supported by the elastic force of the two groups of No. 2 elastic members to drive the two groups of sealing arc covers (15) to abut against the bottom of the air guide tube (6) to seal, the two groups of sealing arc covers (15) are locked and connected with the two groups of limit plates (1102) through a No. 1 locking assembly (18), and the bottoms of the two groups of sealing arc covers (15) are provided with a power assembly (17) for driving them to move away from each other in a mirror image; The pressure relief assembly comprises a pressure relief ring (14) and pressure relief holes (301), a plurality of groups of the pressure relief holes (301) are evenly arranged on the wall surface of the pressing piston (3), the pressure relief ring (14) is slidably installed in the pressing piston (3), and seals the plurality of groups of pressure relief holes (301), the pressure relief ring (14) is elastically connected to the inner wall of the pressing piston (3) through a No. 3 elastic member, and the pressure relief ring (14) is locked and connected to the two groups of sealing arc covers (15) through a No. 2 locking assembly (19); When the air pressure in the pressing piston (3) exceeds a preset value, the movable disk (11) is forced to slide a preset stroke, and the No. 1 locking component (18) unlocks the two sets of sealing arc covers (15) to slide close to each other. When the two sets of sealing arc covers (15) are in abutment and contact, the No. 2 locking component (19) unlocks the pressure relief ring (14) to slide, and multiple sets of pressure relief holes (301) are leaked to achieve pressure relief.

2. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: The explosion-proof cover (2) and the rubber cartridge heating module (1) are fixed by means of a slot.

3. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: A group of guide columns (8) are fixedly mounted on both sides of the pressing piston (3), and the two groups of guide columns (8) are slidably mounted in guide grooves (201) arranged on both sides of the explosion-proof cover (2).

4. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: The driving member is a rotary inner thread sleeve (5), which is rotatably mounted at a mounting opening at the upper end of the explosion-proof cover (2), and the outer wall of the pressing piston (3) is provided with an external thread for threaded connection with the rotary inner thread sleeve (5).

5. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: The upper end surface of the movable disk (11) is elastically connected to the fixed ring (10) in the pressing piston (3) via a first elastic member.

6. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: The No. 1 locking assembly (18) includes a fixed plate (1801) and a movable wedge (1802), wherein the fixed plate (1801) is fixedly mounted on the sealing arc cover (15), and the movable wedge (1802) is slidably mounted on the fixed plate (1801) and elastically connected to the fixed plate (1801) via a No. 4 elastic member, and the inclined surface of the movable wedge (1802) is directed toward the inner wall of the downward-pressing piston (3), and the limiting plate (1102) at the bottom of the movable disk (11) can abut against the vertical surface of the movable wedge (1802) to limit the movement of the fixed plate (1801) and the movable wedge (1802).

7. A conventional rubber cylinder piston explosion-proof cover structure according to claim 6, characterized in that: The second locking assembly (19) comprises a locking plug plate (1901) and a fixed wedge block (1903). The locking plug plate (1901) is slidably installed in a horizontal direction in a guide groove (201) provided on the fixed plate (1801), and is elastically connected to the fixed plate (1801) via a fifth elastic member. The fixed wedge block (1903) is fixedly installed on the pressure relief ring (14), with its inclined side facing the upper side of the downward pressure piston (3). The bottom of the inclined side of the fixed wedge block (1903) is provided with a locking groove for inserting the end of the locking plug plate (1901).

8. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: The power assembly (17) comprises a pressure plate (1701) and two sets of transmission connecting rods (1702), one end of the two sets of transmission connecting rods (1702) are respectively hinged on both sides of the pressure plate (1701), and the other end is fixedly mounted on the bottom of the two sets of sealing arc covers (15) in a mirror-like manner.

9. A conventional rubber cylinder piston explosion-proof cover structure according to claim 1, characterized in that: A limit ring (13) is provided between the movable disk (11) and the pressure relief ring (14); the limit ring (13) is fixedly mounted on the inner wall of the pressing piston (3) and is used to limit the sliding stroke of the movable disk (11) and the pressure relief ring (14).

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