A new type of quick exhaust valve used in large foaming machines

Abstract

A new type of quick exhaust valve used in a large foaming machine, the pressure oil enters the oil chamber 1 and the oil chamber 2 of the pilot valve body through the pilot pressure channel, the pilot valve piston moves upward under the pushing action of the pressure oil until the channel between the oil groove and the valve core hole 1 is completely blocked and separated, at this time, the hydraulic oil quick exhaust channel is in a closed state; when the hydraulic oil quick exhaust channel is opened, the pressure oil in the oil chamber 1 and the oil chamber 2 is first discharged through the pilot pressure channel, at this time, the pilot valve piston moves downward under the action of the first spring, the channel between the oil groove and the valve core hole 1 is quickly opened, and the hydraulic oil above the main piston mechanism in the vertical oil chamber is quickly discharged through the hydraulic oil quick exhaust channel, thereby effectively accelerating the rising speed of the main piston mechanism. The present invention has the characteristics of novel structure, faster pressure relief speed and stronger practicality.

Description

Technical Field

[0001] The invention belongs to the field of large foaming machine accessories, in particular to an EVA foaming machine, and relates to a novel quick exhaust valve applied to the large foaming machine. Background Art

[0002] The quick exhaust valve in the existing large foaming machine has the problem of slow pressure relief speed, which not only affects the working efficiency of the hydraulic system of the large foaming machine, but also affects the foaming quality of the large foaming machine. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a new quick exhaust valve applied to a large foaming machine, which has the characteristics of novel structure, faster pressure relief speed and stronger practicality.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following specific technical measures: a new type of quick exhaust valve used in a large foaming machine, which is composed of a vertical main valve body, a main piston mechanism, a pilot valve body, a pilot valve piston, a valve cover, a main valve pressure flange, a spring, a three-way flange, an oil return pipe, and a vertical core pipe, characterized in that:

[0005] A first oil port connected to the main oil cylinder is integrally formed at the lower end of the front side of the vertical main valve body, a second oil port is integrally formed at the lower end of the right side of the vertical main valve body, one end of the transverse oil pipe is connected to the second oil port, and the other end of the transverse oil pipe is connected to the oil tank;

[0006] A vertical oil chamber is integrally formed inside the vertical main valve body, and the first oil port and the second oil port are both connected to the vertical oil chamber. A main piston mechanism is built into the vertical oil chamber, and the main piston mechanism can move up and down along the vertical oil chamber;

[0007] The main piston mechanism includes a piston body, a valve core, a fixed guide sleeve, a second spring, a movable guide sleeve, a wire retaining ring, and a screw. A second valve core hole recessed upward is integrally formed in the middle of the bottom surface of the piston body. The second valve core hole can be connected to the first oil port. A vertical guide hole is drilled upward from the middle of the second valve core hole.

[0008] The valve core is composed of a vertical rod and a transverse valve body, the middle part of the top surface of the transverse valve body protrudes upward and is fastened to the bottom rod end of the vertical rod by welding;

[0009] The fixed guide sleeve is inserted downward from the top of the vertical rod of the valve core, the second spring is inserted downward from the top of the vertical rod of the valve core, the lower end of the second spring is sleeved on the outer periphery of the upper section of the fixed guide sleeve, the movable guide sleeve is also inserted downward from the top of the vertical rod of the valve core, a wire retaining ring is provided at the connection between the movable guide sleeve and the vertical rod of the valve core, the upper end of the second spring is sleeved on the outer periphery of the lower section, and a positioning nut is screwed into the top of the vertical rod of the valve core, and the bottom surface of the positioning nut can press the top surface of the movable guide sleeve;

[0010] The vertical rod of the valve core connected with the positioning nut, the movable guide sleeve and the second spring is placed upward into the vertical guide hole, and the fixed guide sleeve is fixedly connected to the second valve core hole by screws;

[0011] The top surface of the transverse valve block of the valve core can press upward on the edge of the second valve core hole, and a plurality of oblique oil holes are arranged on the side circumference of the piston body, and the second valve core hole is connected with the second oil port through the oblique oil holes;

[0012] A valve is integrally formed at the lower end of the vertical oil chamber. When the main piston mechanism is at the lowest position, the bottom of the piston body can press downward on the upper part of the valve. At this time, the main piston mechanism can block the vertical oil chamber from the first oil port. At the same time, the lower section of the side wall of the main piston mechanism can block the second oil port from the vertical oil chamber.

[0013] A valve cover is fastened with bolts at the top entrance of the vertical main valve body. A vertical oil hole is drilled downward from the middle of the top surface of the valve cover, a valve core hole 1 is drilled upward from the middle of the bottom surface of the valve cover, and an upwardly concave oil groove is milled on the bottom surface of the valve cover. The oil groove is arranged on the side of the valve core hole 1, the oil groove is connected with the valve core hole 1, and the valve core hole 1 is connected with the vertical oil hole;

[0014] An oil chamber 1 which is concave downwards is integrally formed in the middle of the top surface of the pilot valve body, and the pilot valve piston can be downwardly placed in the oil chamber 1. A spring groove which is concave downwards is integrally formed in the middle of the top surface of the pilot valve piston, and an oil chamber 2 which is concave upwards is integrally formed in the middle of the bottom surface of the pilot valve piston. The pilot valve body with the built-in pilot valve piston is fastened in the valve core hole 1 by bolts.

[0015] A transverse pressure-guiding hole 1 is drilled from the side of the valve cover, and a vertical pressure-guiding hole is drilled upward from the upper hole wall of the valve core hole 1 until it is connected with the transverse pressure-guiding hole 1;

[0016] A second vertical pressure guide hole is drilled downward from one side of the top surface of the pilot valve body, and the second vertical pressure guide hole is connected to the first vertical pressure guide hole. A second transverse pressure guide hole is drilled from one side of the pilot valve body until it is connected to the second vertical pressure guide hole. The entrance of the second transverse pressure guide hole is blocked. A convection hole is drilled downward from the middle of the bottom surface of the first oil chamber until it is connected to the second transverse pressure guide hole.

[0017] The first transverse pressure-guiding hole, the first vertical pressure-guiding hole, the second vertical pressure-guiding hole, the second transverse pressure-guiding hole, and the convection hole are combined to form a pilot pressure-guiding channel;

[0018] The three-way flange is vertically placed on the middle of the top surface of the valve cover by bolts, the bottom opening of the three-way flange is connected to the vertical oil hole, the side opening of the three-way flange is connected to the upper pipe end of the oil return pipe, and the lower pipe end of the oil return pipe is connected to the horizontal oil pipe;

[0019] A horizontal fixing seat is integrally formed in the middle of the bottom opening of the three-way flange, a vertical fixing hole is drilled in the middle of the horizontal fixing seat, the upper shaft end of the vertical core tube is fastened in the vertical fixing hole, the hollow tube cavity of the vertical core tube serves as the first oil passage cavity, a plurality of side oil ports are cut at the lower end of the tube wall of the vertical core tube, the lower end of the vertical core tube can be placed in the vertical oil hole, and the gap between the outer periphery of the vertical core tube and the vertical oil hole serves as the second oil passage cavity;

[0020] The pilot valve piston is located directly below the vertical core tube;

[0021] A first spring is sleeved on the periphery of the vertical core tube, the upper end of the first spring presses upward on the bottom surface of the horizontal fixed seat, and the lower end of the first spring can press downward in the spring groove on the top surface of the pilot valve piston;

[0022] A vertical pressure oil hole is drilled downward from the top side of the valve cover to the bottom of the valve cover, and a main valve pressure flange is installed on the top side of the valve cover, and the main valve pressure flange is connected to the vertical pressure oil hole;

[0023] The oil groove, valve core hole 1, oil chamber 1, oil chamber 2, three-way flange and oil return pipe are combined to form a hydraulic oil rapid discharge channel;

[0024] The pressure oil enters the oil chamber 1 and the oil chamber 2 of the pilot valve body through the pilot pressure channel. The pilot valve piston moves upward under the pushing action of the pressure oil until the channel between the oil groove and the valve core hole 1 is completely blocked and isolated. At this time, the hydraulic oil quick discharge channel is in a closed state.

[0025] When the hydraulic oil quick discharge channel is opened, the pressure oil in the oil chamber one and the oil chamber two is first discharged through the pilot pressure channel. At this time, the pilot valve piston moves downward under the action of the first spring, and the channel between the oil groove and the valve core hole one is quickly opened. The hydraulic oil above the main piston mechanism in the vertical oil chamber is quickly discharged through the hydraulic oil quick discharge channel, thereby effectively accelerating the rising speed of the main piston mechanism.

[0026] The beneficial effects of the present invention are that it has the characteristics of novel structure, faster pressure relief speed and stronger practicality.

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a top view of the overall combined connection structure of the present invention;

[0029] Figure 2 for Figure 1 Sectional view in the middle AA direction;

[0030] Figure 3 for Figure 2Cross-sectional view in the BB direction when the hydraulic oil quick discharge channel is in the closed state;

[0031] Figure 4 for Figure 2 Cross-sectional view in the BB direction when the hydraulic oil quick discharge channel is in the open state.

[0032] In the figure: 1-vertical main valve body, 2-main piston mechanism, 3-pilot valve body, 4-pilot valve piston, 5-valve cover, 6-main valve pressure flange, 7-first spring, 8-vertical core tube, 9-tee flange, 10-return oil pipe, 11-first oil port, 12-second oil port, 13-lateral oil pipe, 14-oil groove, 15-pilot pressure channel. DETAILED DESCRIPTION

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a new type of quick exhaust valve used in a large foaming machine is composed of a vertical main valve body 1, a main piston mechanism 2, a pilot valve body 3, a pilot valve piston 4, a valve cover 5, a main valve pressure flange 6, a spring, a three-way flange 9, an oil return pipe 10, and a vertical core pipe 8. It is characterized in that:

[0034] A first oil port 11 connected to the main oil cylinder is integrally formed at the lower end of the front side of the vertical main valve body 1, and a second oil port 12 is integrally formed at the lower end of the right side of the vertical main valve body 1. One end of a transverse oil pipe 13 is connected to the second oil port 12, and the other end of the transverse oil pipe 13 is connected to the oil tank.

[0035] A vertical oil chamber is integrally formed inside the vertical main valve body 1, and the first oil port 11 and the second oil port 12 are both connected to the vertical oil chamber. A main piston mechanism 2 is built in the vertical oil chamber, and the main piston mechanism 2 can move up and down along the vertical oil chamber;

[0036] The main piston mechanism 2 includes a piston body, a valve core, a fixed guide sleeve, a second spring, a movable guide sleeve, a wire retaining ring, and a screw. A valve core hole 2 which is recessed upward is formed in the middle of the bottom surface of the piston body. The valve core hole 2 can be connected to the first oil port 11. A vertical guide hole is drilled upward from the middle of the valve core hole 2.

[0037] The valve core is composed of a vertical rod and a transverse valve body, the middle part of the top surface of the transverse valve body protrudes upward and is fastened to the bottom rod end of the vertical rod by welding;

[0038] The fixed guide sleeve is inserted downward from the top of the vertical rod of the valve core, the second spring is inserted downward from the top of the vertical rod of the valve core, the lower end of the second spring is sleeved on the outer periphery of the upper section of the fixed guide sleeve, the movable guide sleeve is also inserted downward from the top of the vertical rod of the valve core, a wire retaining ring is provided at the connection between the movable guide sleeve and the vertical rod of the valve core, the upper end of the second spring is sleeved on the outer periphery of the lower section, and a positioning nut is screwed into the top of the vertical rod of the valve core, and the bottom surface of the positioning nut can press the top surface of the movable guide sleeve;

[0039] The vertical rod of the valve core connected with the positioning nut, the movable guide sleeve and the second spring is placed upward into the vertical guide hole, and the fixed guide sleeve is fixedly connected to the second valve core hole by screws;

[0040] The top surface of the transverse valve block of the valve core can press upward on the edge of the second valve core hole. A plurality of oblique oil holes are arranged on the side circumference of the piston body. The second valve core hole is connected with the second oil port 12 through the oblique oil holes.

[0041] A valve is integrally formed at the lower end of the vertical oil chamber. When the main piston mechanism 2 is at the lowest position, the bottom of the piston body can press downward on the upper part of the valve. At this time, the main piston mechanism 2 can block the vertical oil chamber from the first oil port 11. At the same time, the lower section of the side wall of the main piston mechanism 2 can block the second oil port 12 from the vertical oil chamber.

[0042] A valve cover 5 is fastened with bolts at the top entrance of the vertical main valve body 1. A vertical oil hole is drilled downward from the middle of the top surface of the valve cover 5. A valve core hole 1 is drilled upward from the middle of the bottom surface of the valve cover 5. The bottom surface of the valve cover 5 is also milled with an upwardly concave oil groove 14. The oil groove 14 is arranged on the side of the valve core hole 1. The oil groove 14 is connected with the valve core hole 1, and the valve core hole 1 is connected with the vertical oil hole.

[0043] An oil chamber 1 which is concave downwards is integrally formed in the middle of the top surface of the pilot valve body 3, and the pilot valve piston 4 can be downwardly inserted into the oil chamber 1. A spring groove which is concave downwards is integrally formed in the middle of the top surface of the pilot valve piston 4, and an oil chamber 2 which is concave upwards is integrally formed in the middle of the bottom surface of the pilot valve piston 4. The pilot valve body 3 with the built-in pilot valve piston 4 is fastened to the valve core hole 1 by bolts;

[0044] A transverse pressure-conducting hole 1 is drilled from the side of the valve cover 5, and a vertical pressure-conducting hole is drilled upward from the upper hole wall of the valve core hole 1 until it is connected with the transverse pressure-conducting hole 1;

[0045] A vertical pressure-guiding hole 2 is drilled downward from one side of the top surface of the pilot valve body 3, and the vertical pressure-guiding hole 2 is connected to the vertical pressure-guiding hole 1. A horizontal pressure-guiding hole 2 is drilled from one side of the pilot valve body 3 until it is connected to the vertical pressure-guiding hole 2, and the entrance of the horizontal pressure-guiding hole 2 is blocked. A convection hole is drilled downward from the middle of the bottom surface of the oil chamber 1 until it is connected to the horizontal pressure-guiding hole 2.

[0046] The first transverse pressure-conducting hole, the first vertical pressure-conducting hole, the second vertical pressure-conducting hole, the second transverse pressure-conducting hole, and the convection hole are combined to form a pilot pressure-conducting channel 15;

[0047] The three-way flange 9 is vertically placed on the middle of the top surface of the valve cover 5 by bolts, the bottom opening of the three-way flange 9 is connected to the vertical oil hole, the side opening of the three-way flange 9 is connected to the upper pipe end of the oil return pipe 10, and the lower pipe end of the oil return pipe 10 is connected to the horizontal oil pipe 13;

[0048] A horizontal fixing seat is integrally formed in the middle of the bottom opening of the three-way flange 9, a vertical fixing hole is drilled in the middle of the horizontal fixing seat, the upper shaft end of the vertical core tube 8 is fastened in the vertical fixing hole, the hollow tube cavity of the vertical core tube 8 is used as the first oil passage cavity, the lower end of the tube wall of the vertical core tube 8 is cut with a plurality of side oil ports, the lower end of the vertical core tube 8 can be placed in the vertical oil hole, and the gap between the outer periphery of the vertical core tube 8 and the vertical oil hole is used as the second oil passage cavity;

[0049] The pilot valve piston 4 is located directly below the vertical core tube 8;

[0050] A first spring 7 is sleeved on the periphery of the vertical core tube 8, the upper end of the first spring 7 presses upward on the bottom surface of the horizontal fixed seat, and the lower end of the first spring 7 can press downward in the spring groove on the top surface of the pilot valve piston 4;

[0051] A vertical oil pressure hole is drilled downward from the top side of the valve cover 5 to the bottom side of the valve cover 5, and a main valve pressure flange 6 is installed on the top side of the valve cover 5, and the main valve pressure flange 6 is connected to the vertical oil pressure hole;

[0052] The oil groove 14, the valve core hole 1, the oil chamber 1, the oil chamber 2, the three-way flange 9, and the oil return pipe 10 are combined to form a hydraulic oil rapid discharge channel.

[0053] The pressure oil enters the oil chamber 1 and the oil chamber 2 of the pilot valve body 3 through the pilot pressure channel 15. The pilot valve piston 4 moves upward under the pushing action of the pressure oil until the channel between the oil groove 14 and the valve core hole 1 is completely blocked. At this time, the hydraulic oil quick discharge channel is in a closed state.

[0054] When the hydraulic oil quick discharge channel is opened, the pressure oil in the oil chamber 1 and the oil chamber 2 is first discharged through the pilot pressure channel 15. At this time, the pilot valve piston 4 moves downward under the action of the first spring 7, and the channel between the oil groove 14 and the valve core hole 1 is quickly opened. The hydraulic oil in the vertical oil chamber above the main piston mechanism 2 is quickly discharged through the hydraulic oil quick discharge channel, thereby effectively accelerating the rising speed of the main piston mechanism 2.

Claims

1. A new type of quick exhaust valve used in a large foaming machine, which is composed of a vertical main valve body (1), a main piston mechanism (2), a pilot valve body (3), a pilot valve piston (4), a valve cover (5), a main valve pressure flange (6), a spring, a three-way flange (9), an oil return pipe (10), and a vertical core pipe (8), and is characterized in that: A first oil port (11) connected to a main oil cylinder is integrally formed at the lower end of the front side of the vertical main valve body (1), a second oil port (12) is integrally formed at the lower end of the right side of the vertical main valve body (1), one end of a transverse oil pipe (13) is connected to the second oil port (12), and the other end of the transverse oil pipe (13) is connected to the oil tank; A vertical oil chamber is integrally formed inside the vertical main valve body (1); the first oil port (11) and the second oil port (12) are both connected to the vertical oil chamber; a main piston mechanism (2) is built into the vertical oil chamber; the main piston mechanism (2) can move up and down along the vertical oil chamber; A valve is integrally formed at the lower end of the vertical oil chamber. When the main piston mechanism (2) is at the lowest position, the bottom of the piston body can press downward on the upper part of the valve. At this time, the main piston mechanism (2) can block the vertical oil chamber from the first oil port (11). At the same time, the lower section of the side wall of the main piston mechanism (2) can block the second oil port (12) from the vertical oil chamber. A valve cover (5) is fastened with bolts at the top entrance of the vertical main valve body (1); a vertical oil hole is drilled downward from the middle of the top surface of the valve cover (5); a valve core hole 1 is drilled upward from the middle of the bottom surface of the valve cover (5); an upwardly recessed oil groove (14) is milled on the bottom surface of the valve cover (5); the oil groove (14) is arranged on the side of the valve core hole 1; the oil groove (14) is connected to the valve core hole 1; and the valve core hole 1 is connected to the vertical oil hole; An oil chamber 1 which is concave downwards is integrally formed in the middle of the top surface of the pilot valve body (3), and the pilot valve piston (4) can be inserted downwards into the oil chamber 1. A spring groove which is concave downwards is integrally formed in the middle of the top surface of the pilot valve piston (4), and an oil chamber 2 which is concave upwards is integrally formed in the middle of the bottom surface of the pilot valve piston (4). The pilot valve body (3) with the pilot valve piston (4) built therein is fastened to the valve core hole 1 by bolts. A transverse pressure guide hole 1 is drilled from the side of the valve cover (5), and a vertical pressure guide hole is drilled upward from the upper hole wall of the valve core hole 1 until it is connected to the transverse pressure guide hole 1; A second vertical pressure guide hole is drilled downward from one side of the top surface of the pilot valve body (3), the second vertical pressure guide hole is connected to the first vertical pressure guide hole, a second transverse pressure guide hole is drilled from one side surface of the pilot valve body (3) until it is connected to the second vertical pressure guide hole, the entrance of the second transverse pressure guide hole is blocked, and a convection hole is drilled downward from the middle of the bottom surface of the first oil chamber until it is connected to the second transverse pressure guide hole; The first transverse pressure-conducting hole, the first vertical pressure-conducting hole, the second vertical pressure-conducting hole, the second transverse pressure-conducting hole, and the convection hole are combined to form a pilot pressure-conducting channel (15); The three-way flange (9) is vertically placed on the middle of the top surface of the valve cover (5) by bolts, the bottom opening of the three-way flange (9) is connected to the vertical oil hole, the side opening of the three-way flange (9) is connected to the upper pipe end of the oil return pipe (10), and the lower pipe end of the oil return pipe (10) is connected to the horizontal oil pipe (13); A horizontal fixing seat is integrally formed in the middle of the bottom opening of the three-way flange (9), a vertical fixing hole is drilled in the middle of the horizontal fixing seat, the upper shaft end of the vertical core tube (8) is fastened in the vertical fixing hole, the hollow tube cavity of the vertical core tube (8) serves as the first oil passage cavity, a plurality of side oil ports are cut at the lower end of the tube wall of the vertical core tube (8), the lower end of the vertical core tube (8) can be placed in the vertical oil hole, and the gap between the outer periphery of the vertical core tube (8) and the vertical oil hole serves as the second oil passage cavity; The pilot valve piston (4) is located directly below the vertical core tube (8); A first spring (7) is sleeved on the periphery of the vertical core tube (8), the upper end of the first spring (7) presses upward against the bottom surface of the horizontal fixed seat, and the lower end of the first spring (7) can press downward into a spring groove on the top surface of the pilot valve piston (4); A vertical oil pressure hole is drilled downward from the top side of the valve cover (5) to the bottom side of the valve cover (5), and a main valve pressure flange (6) is installed on the top side of the valve cover (5), and the main valve pressure flange (6) is connected to the vertical oil pressure hole; The oil groove (14), the first valve core hole, the first oil chamber, the second oil chamber, the three-way flange (9), and the oil return pipe (10) are combined to form a hydraulic oil rapid discharge channel.

2. According to claim 1, a new type of quick exhaust valve used in a large foaming machine is characterized in that: The main piston mechanism (2) comprises a piston body, a valve core, a fixed guide sleeve, a second spring, a movable guide sleeve, a wire retaining ring, and screws. A second valve core hole recessed upward is integrally formed in the middle of the bottom surface of the piston body. The second valve core hole can be connected to the first oil port (11). A vertical guide hole is drilled upward from the middle of the second valve core hole. The valve core is composed of a vertical rod and a transverse valve body, the middle part of the top surface of the transverse valve body protrudes upward and is fastened to the bottom rod end of the vertical rod by welding; The fixed guide sleeve is inserted downward from the top of the vertical rod of the valve core, the second spring is inserted downward from the top of the vertical rod of the valve core, the lower end of the second spring is sleeved on the outer periphery of the upper section of the fixed guide sleeve, the movable guide sleeve is also inserted downward from the top of the vertical rod of the valve core, a wire retaining ring is provided at the connection between the movable guide sleeve and the vertical rod of the valve core, the upper end of the second spring is sleeved on the outer periphery of the lower section, and a positioning nut is screwed into the top of the vertical rod of the valve core, and the bottom surface of the positioning nut can press the top surface of the movable guide sleeve; The vertical rod of the valve core connected with the positioning nut, the movable guide sleeve and the second spring is placed upward into the vertical guide hole, and the fixed guide sleeve is fixedly connected to the second valve core hole by screws; The top surface of the transverse valve block of the valve core can press upward on the edge of the second valve core hole. The side circumference of the piston body is provided with a plurality of oblique oil holes. The second valve core hole is connected to the second oil port (12) through the oblique oil holes.

3. According to claim 1, a new type of quick exhaust valve used in a large foaming machine is characterized in that: The pressure oil enters the oil chamber 1 and the oil chamber 2 of the pilot valve body (3) through the pilot pressure channel (15). The pilot valve piston (4) moves upward under the pushing action of the pressure oil until the channel between the oil groove (14) and the valve core hole 1 is completely blocked and isolated. At this time, the hydraulic oil quick discharge channel is in a closed state.

4. According to claim 1, a new type of quick exhaust valve used in a large foaming machine is characterized in that: When the hydraulic oil quick discharge channel is opened, the pressure oil in the oil chamber 1 and the oil chamber 2 is first discharged through the pilot pressure channel (15). At this time, the pilot valve piston (4) moves downward under the action of the first spring (7), and the channel between the oil groove (14) and the valve core hole 1 is quickly opened. The hydraulic oil in the vertical oil chamber above the main piston mechanism (2) is quickly discharged through the hydraulic oil quick discharge channel, thereby effectively accelerating the rising speed of the main piston mechanism (2).

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