Valve head pressing device for a quantitative valve

Abstract

The utility model relates to a valve head pressing device of a quantitative valve. Including cylinder, fixed base, movable seat and pressing component, the cylinder sets up on fixed base, fixed base and movable seat do movable connection, movable seat lower extreme is equipped with movable mouth, the pressing component includes pushing and pushing rod and a plurality of pressing rods, a plurality of pressing rods are in movable mouth and are distributed in the circumference, the middle part of a plurality of pressing rods is rotatably connected in movable mouth, the output end of cylinder passes through fixed base and is connected with the upper end of pushing and pushing rod, the lower end of pushing and pushing rod does abuttable connection with pressing rod. The utility model drives through the cylinder, makes movable seat first down pressure close to the valve head of waiting to press tightly, then in the process that the second section of cylinder output end moves down, the pressure head of the lower end of pressing rod contracts simultaneously, and is pressed on the valve head, realizes the fastening of valve head.

Description

Technical Field

[0001] This utility model belongs to the technical field of quantitative valve production equipment, specifically relating to a valve head pressing device for a quantitative valve. Background Technology

[0002] Metering valves are widely used in sprays, aerosols, and spray bottles. Their function is to pump compressed gas or liquid out of the can by pressing down on the valve stem. In order to achieve single-press single-dispense, a metering valve is installed at the connection point so that only a fixed amount of aerosol or liquid is dispensed with each press, thus achieving metered use.

[0003] Since metering valves are frequently used structures, and whether gas or liquid can be ejected smoothly depends entirely on the lifespan of the metering valve, once the metering valve is damaged and the valve head falls off, the high-pressure gas or liquid in the tank will be ejected and released instantly, causing personal safety issues and material waste. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a valve head clamping device for a metering valve. Driven by a cylinder, the movable seat first presses down close to the valve head to be clamped. Then, during the two-stage downward movement of the cylinder output end, the lower end of the clamping rod simultaneously retracts and presses against the valve head, thereby achieving valve head fastening.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A valve head clamping device for a metering valve includes a cylinder, a fixed seat, a movable seat, and a clamping component. The cylinder is mounted on the fixed seat, and the fixed seat and the movable seat are movably connected. The lower end of the movable seat has a movable port. The clamping component includes a pushing rod and several clamping rods. The several clamping rods are circumferentially distributed within the movable port, and the middle parts of the several clamping rods are rotatably connected within the movable port. The output end of the cylinder passes through the fixed seat and is connected to the upper end of the pushing rod. The lower end of the pushing rod is abuttingly connected to the clamping rod.

[0007] The lower end of the push rod is provided with a conical head. Driven by the cylinder, the conical head abuts against the upper end of several circumferentially distributed clamping rods. As the conical head moves downward, it spreads the upper ends of the clamping rods apart.

[0008] The movable seat is provided with a limiting rod, and the fixed seat is provided with a limiting hole. The limiting rod fits into the limiting hole, and the limiting piece connected to the upper end of the limiting rod can abut against the upper end surface of the limiting hole. The movable seat is provided with a first crossbar, and the limiting rod is disposed on the first crossbar. The fixed seat is provided with a second crossbar, and the limiting hole is disposed on the second crossbar. The outer side wall of the fixed seat is provided with a through hole, and the second crossbar can be movably connected to the through hole. The limiting rod and the limiting hole each include two sets, and the two sets of the limiting rod and the limiting hole are symmetrical about the axis of the fixed seat.

[0009] The push rod passes through the first hole on the first crossbar, and the upper end face of the conical head can abut against the lower end face of the first crossbar.

[0010] The valve head clamping device of the quantitative valve with this structure has a fixed seat that is fixed on the frame. The valve head to be clamped is placed on the conveyor turntable and rotated to the bottom of the fixed seat according to the production sequence to clamp the valve head. Since the frame and conveyor turntable are existing technologies, they are simplified in the attached drawings, and their working principle will not be described in detail. To enable the cylinder on the fixed seat to drive the movable seat to move towards and press the valve head, several pressing rods are first installed in a circular pattern on the movable port at the lower end of the movable seat. The middle part of the pressing rod is rotatably connected inside the movable port. Therefore, when the upper end of the pressing rod is subjected to an external force and moves outward away from the axial direction of the movable port, the pressing head at the lower end of the pressing rod moves towards the axial direction of the movable port. Thus, when the upper ends of several pressing rods are subjected to an external force at the same time, the pressing head at the lower end of the pressing rod can achieve equal pressing force, thereby ensuring that the valve head to be pressed is pressed evenly. Therefore, a conical head is provided at the lower end of the push rod. When the tip of the conical head moves downward and its side abuts against the upper end of the pressing rod, it can provide a gradually increasing force away from the axis, thereby ensuring that the pressing head applies linear pressure during the pressing process. To achieve this technology, the output end of the cylinder is connected to the upper end of the push rod, so the downward pressure of the push rod can be achieved under the drive of the cylinder.

[0011] However, in the production line, the valve head to be pressed cannot touch the clamping rod before rotating to the lower end of the fixed seat. Otherwise, it will affect the assembly effect of the valve head to be pressed, and the displacement of the valve head to be pressed will cause the subsequent pressing of the valve head to fail, affecting the yield rate. Therefore, before the clamping rod applies pressure, the movable seat needs to be able to move towards the valve head to be pressed before further pressure is applied to the clamping rod to press the valve head to be pressed. Therefore, a first crossbar is set in the movable seat, and the push rod passes through the first hole on the first crossbar, so that the upper end face of the conical head abuts against the lower end face of the first crossbar. Therefore, when not working, after pulling up the push rod, the upper end face of the conical head abuts against the lower end face of the first crossbar and drives the movable seat to move upward until the movable seat abuts against the fixed seat. When working, the push rod is pushed down, and the movable seat moves upward. The cone head will remain in contact with the first crossbar due to its own weight. At this point, it needs to move down to a specific distance from the valve head to be pressed, and then the movable seat will remain fixed. The pushing rod will continue to move down until the cone head abuts against the pressing rod. If the distance is not limited, the pressing rod will abut against the valve head to be pressed and cause damage. To solve this problem, a limiting rod is set on the first crossbar, and a limiting hole is set on the second crossbar inside the fixed seat. In addition to the limiting rod cooperating with the limiting hole, the limiting piece at the upper end of the limiting rod can abut against the upper end face of the limiting hole. Therefore, adjusting the distance of the limiting piece can correct the distance to the valve head to be pressed. So when the limiting piece abuts against the limiting hole, the movable seat will no longer move down. Therefore, the cone head can disengage from the first crossbar and press down on the pressing rod, thus pressing the valve head to be pressed.

[0012] The fit between a single set of limit rods and limit holes is not stable enough. Therefore, two sets of limit rods and limit holes are set, symmetrically arranged with the axis of the fixed seat as the center of symmetry, thereby improving the stability during the up and down movement. Since the up and down movement of the movable seat depends on the fit between the limit rods and limit holes, this fit may lead to slight misalignment and jamming under long-term production operation. The cause is largely related to the initial assembly precision, but coaxial assembly is particularly difficult, and debugging is also difficult. To solve this problem, a through hole is set on the outer wall of the fixed seat, and the second crossbar is movably connected in the through hole. The size of the through hole is larger than the cross-section of the second crossbar. Therefore, even if the second crossbar is not fixedly connected, slight misalignment during production operation can be eliminated by the flexible fit between the second crossbar and the through hole.

[0013] Furthermore, the clamping component also includes a spring, the upper end of the push rod is provided with a limiting part, the push rod passes through the first hole on the first crossbar and the second hole on the second crossbar in sequence, the spring is sleeved on the push rod, the upper and lower ends of the spring abut against the limiting part and the upper end face of the first crossbar respectively, and the outer side wall of the spring does not contact the second hole.

[0014] Compared with the prior art, the advantages of this utility model are as follows: by setting the conical head so that its tip moves downward and its side abuts against the upper end of the clamping rod, it can provide a gradually increasing force away from the axis, thereby ensuring that the pressure head applies linear pressure during the clamping process, realizing the downward pressure of the push rod and retracting the pressure head at the lower end of the push rod, so that the valve head to be clamped is clamped evenly enough during the clamping process, realizing the fastening of the valve head. The two-stage downward pressure can make room for rotating the valve head and can also avoid contact with the valve head during production, ensuring the safe production of the valve head. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a top view of the present invention;

[0018] Figure 3 For the present utility model Figure 2 AA section view;

[0019] Figure 4 This is a schematic diagram of the movable seat pressing down in this utility model;

[0020] Figure 5 This is a schematic diagram of the downward pressing of the push rod of this utility model.

[0021] The components are: 1. Cylinder; 2. Fixed seat; 21. Limiting hole; 22. Second crossbar; 23. Through hole; 24. Second hole; 3. Movable seat; 31. Movable opening; 32. Limiting rod; 33. Limiting piece; 34. First crossbar; 35. First hole; 4. Pressing component; 41. Pushing rod; 411. Conical head; 412. Limiting part; 42. Pressing rod; 43. Spring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The specific embodiments of this utility model will now be described with reference to the accompanying drawings:

[0024] like Figure 1-5 As shown, a valve head clamping device for a metering valve includes a cylinder 1, a fixed seat 2, a movable seat 3, and a clamping component 4. The cylinder 1 is mounted on the fixed seat 2, and the fixed seat 2 and the movable seat 3 are movably connected. The lower end of the movable seat 3 is provided with a movable port 31. The clamping component 4 includes a pushing rod 41 and several clamping rods 42. The several clamping rods 42 are circumferentially distributed within the movable port 31, and the middle part of the several clamping rods 42 is rotatably connected within the movable port 31. The output end of the cylinder 1 passes through the fixed seat 2 and is connected to the upper end of the pushing rod 41. The lower end of the pushing rod 41 is abuttingly connected to the clamping rods 42.

[0025] The lower end of the push rod 41 is provided with a conical head 411. Under the drive of the cylinder 1, the conical head 411 abuts against the upper end of a plurality of circumferentially distributed pressing rods 42. During the downward movement of the conical head 411, the upper ends of the plurality of pressing rods 42 are opened.

[0026] The movable seat 3 is provided with a limiting rod 32, and the fixed seat 2 is provided with a limiting hole 21. The limiting rod 32 is fitted into the limiting hole 21, and the limiting piece 33 connected to the upper end of the limiting rod 32 can abut against the upper end surface of the limiting hole 21. The movable seat 3 is provided with a first crossbar 34, and the limiting rod 32 is disposed on the first crossbar 34. The fixed seat 2 is provided with a second crossbar 22, and the limiting hole 21 is disposed on the second crossbar 22. The outer side wall of the fixed seat 2 is provided with a through hole 23, and the second crossbar 22 can be movably connected into the through hole 23. The limiting rod 32 and the limiting hole 21 each include two sets, and the two sets of the limiting rod 32 and the limiting hole 21 are symmetrical about the axis of the fixed seat 2.

[0027] The push rod 41 passes through the first hole 35 on the first crossbar 34, and the upper end face of the conical head 411 can abut against the lower end face of the first crossbar 34.

[0028] Furthermore, the pressing component 4 also includes a spring 43, and the upper end of the pushing rod 41 is provided with a limiting part 412. The pushing rod 41 passes through the first hole 35 on the first crossbar 34 and the second hole 24 on the second crossbar 22 in sequence. The spring 43 is sleeved on the pushing rod 41. The upper and lower ends of the spring 43 abut against the limiting part 412 and the upper end face of the first crossbar 34, respectively. The outer side wall of the spring 43 does not contact the second hole 24.

[0029] Description of the working principle of this utility model:

[0030] The valve head clamping device of the quantitative valve using this structure has a fixed base 2 fixed on the machine frame. The valve head to be clamped is placed on the conveyor turntable and rotated to the bottom of the fixed base 2 according to the production sequence to be clamped. Since the machine frame and conveyor turntable are existing technologies, they are simplified in the attached drawings, and their working principle will not be described in detail. In order to realize that the cylinder 1 on the fixed base 2 drives the movable base 3 to move towards the valve head to be clamped and clamp the valve head, several clamping rods 42 are first set on the movable port 31 at the lower end of the movable base 3 in a circular arrangement. The middle part of the clamping rod 42 is rotatably connected to the movable port 31. Therefore, when the upper end of the clamping rod 42 is subjected to an external force and moves outward away from the movable port 31, the pressure head at the lower end of the clamping rod 42 moves towards the movable port 31. Therefore, when the upper ends of several clamping rods 42 are subjected to an external force at the same time, the pressure head at the lower end of the clamping rod 42 moves towards the movable port 31. The head can achieve the same pressing force, so that the valve head to be pressed is sufficiently uniform during the pressing process. Therefore, a conical head 411 is provided at the lower end of the push rod 41. When the tip of the conical head 411 moves downward and its side abuts against the upper end of the pressing rod 42, it can provide a gradually increasing force away from the axis, thereby ensuring that the pressing head applies pressure linearly during the pressing process. To achieve this technology, the output end of the cylinder 1 is connected to the upper end of the push rod 41. Therefore, under the drive of the cylinder 1, the downward pressure of the push rod 41 can be achieved.

[0031] However, in the production line, before the valve head to be pressed rotates to the lower end of the fixed seat 2, it cannot touch the clamping rod 42. Otherwise, it will affect the original assembly effect of the valve head to be pressed, and the displacement of the valve head to be pressed will cause the subsequent pressing of the valve head to fail, affecting the yield rate. Therefore, before the clamping rod 42 applies pressure, the movable seat 3 needs to be able to move towards the valve head to be pressed before further pressure is applied to the clamping rod 42 to press the valve head to be pressed. A first crossbar 34 is provided inside the movable seat 3. The pushing rod 41 passes through the first hole 35 on the first crossbar 34, so that the upper end face of the conical head 411 abuts against the lower end face of the first crossbar 34. Therefore, when not in operation, after pulling up the pushing rod 41, the upper end face of the conical head 411 abuts against the lower end face of the first crossbar 34 and drives the movable seat 3 to move upward until the movable seat 3 abuts against the fixed seat 2. When in operation, pushing down the pushing rod 41, the movable seat 3 moves upward under its own weight. The conical head 411 will remain in contact with the first crossbar 34. At this point, it needs to be moved down to a specific distance from the valve head to be pressed. The movable seat 3 then remains stationary, and the pushing rod 41 continues to move down until the conical head 411 abuts against the pressing rod 42. If the distance is not limited, the pressing rod 42 will abut against the valve head to be pressed, causing damage. To solve this problem, a limiting rod 32 is provided on the first crossbar 34, and a limiting hole is provided on the second crossbar 22 inside the fixed seat 2. 21. When the limiting rod 32 and the limiting hole 21 are engaged, the limiting piece 33 at the upper end of the limiting rod 32 can abut against the upper end face of the limiting hole 21. Therefore, by adjusting the distance of the limiting piece 33, the distance from the valve head to be pressed can be corrected. Therefore, when the limiting piece 33 abuts against the limiting hole 21, the movable seat 3 no longer moves downward. Therefore, the conical head 411 can disengage from the abutment of the first cross bar 34 and press down on the pressing rod 42 to achieve the pressing of the valve head to be pressed.

[0032] The fit between a single set of limiting rods 32 and limiting holes 21 is not stable enough. Therefore, two sets of limiting rods 32 and limiting holes 21 are provided, symmetrically arranged with the axis of the fixed seat 2 as the center of symmetry, thereby improving the stability during the up and down movement. Since the up and down movement of the movable seat 3 depends on the fit between the limiting rods 32 and limiting holes 21, this fit may lead to slight misalignment and jamming under long-term production operation. The cause is largely related to the accuracy at the beginning of assembly. However, coaxial assembly is particularly difficult, and debugging is also difficult. To solve this problem, a through hole 23 is provided on the outer wall of the fixed seat 2, and the second crossbar 22 is movably connected in the through hole 23. The size of the through hole 23 is larger than the cross-section of the second crossbar 22. Therefore, even if the second crossbar 22 is not fixedly connected, slight misalignment during production operation can be eliminated by the flexible fit between the second crossbar 22 and the through hole 23.

[0033] Relying solely on the gravity of the movable seat 3 for downward movement is inefficient, and the unit time of each feed is difficult to control, leading to many uncertainties in the overall production. To address this issue, a limiting part 412 is provided at the upper end of the push rod 41. A spring 43 is fitted onto the push rod 41 through the space between the limiting part 412 and the upper end of the first crossbar 34. Therefore, whether the push rod 41 moves upward or downward, the spring 43 increases the force, ensuring that the execution time of each action is consistent. Since the function of the second crossbar 22 is to flexibly cooperate, the outer wall of the spring 43 does not contact the second hole 24, preventing the extension and contraction of the spring 43 from affecting the second crossbar 22.

[0034] The beneficial effects of this utility model are as follows: by setting the conical head 411 so that its tip moves downward and its side abuts against the upper end of the clamping rod 42, it can provide a gradually increasing force away from the axis, thereby ensuring that the pressure head applies linear pressure during the clamping process, realizing the downward pressure of the pushing rod 41 and retracting the pressure head at the lower end of the pushing rod 41, so that the valve head to be clamped is clamped evenly enough during the clamping process, realizing the fastening of the valve head. The two-stage downward pressure can make room for rotating the valve head and can also avoid contact with the valve head during production, ensuring the safe production of the valve head.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A valve head clamping device for a metering valve, characterized in that: The device includes a cylinder, a fixed seat, a movable seat, and a clamping component. The cylinder is mounted on the fixed seat, and the fixed seat and the movable seat are movably connected. The lower end of the movable seat has a movable opening. The clamping component includes a pushing rod and several clamping rods. The clamping rods are circumferentially distributed within the movable opening, and the middle parts of the clamping rods are rotatably connected within the movable opening. The output end of the cylinder passes through the fixed seat and is connected to the upper end of the pushing rod. The lower end of the pushing rod is abuttingly connected to the clamping rods.

2. The valve head clamping device for the metering valve according to claim 1, characterized in that: The lower end of the push rod is provided with a conical head. Driven by the cylinder, the conical head abuts against the upper end of several circumferentially distributed clamping rods. As the conical head moves downward, it spreads the upper ends of the clamping rods apart.

3. The valve head clamping device for the metering valve according to claim 2, characterized in that: The movable seat is provided with a limiting rod, and the fixed seat is provided with a limiting hole. The limiting rod is fitted into the limiting hole, and the limiting piece connected to the upper end of the limiting rod can abut against the upper surface of the limiting hole.

4. The valve head clamping device for the metering valve according to claim 3, characterized in that: The movable seat is provided with a first crossbar, and the limiting rod is disposed on the first crossbar; the fixed seat is provided with a second crossbar, and the limiting hole is disposed on the second crossbar.

5. The valve head clamping device for the metering valve according to claim 4, characterized in that: The outer wall of the fixed base is provided with a through hole, and the second crossbar is movably connected in the through hole.

6. The valve head clamping device for the metering valve according to claim 5, characterized in that: The limiting rod and limiting hole each include two sets, and the two sets of limiting rod and limiting hole are symmetrical about the axis of the fixed seat.

7. The valve head clamping device for the metering valve according to claim 6, characterized in that: The clamping component also includes a spring. The upper end of the push rod is provided with a limiting part. The push rod passes through the first hole on the first crossbar and the second hole on the second crossbar in sequence. The upper end face of the conical head can abut against the lower end face of the first crossbar. The spring is sleeved on the push rod. The upper and lower ends of the spring abut against the limiting part and the upper end face of the first crossbar, respectively. The outer side wall of the spring does not contact the second hole.

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