Adjustable double-stroke speed regulating valve

Abstract

The invention relates to the technical field of speed regulating valves, in particular to an adjustable double-stroke speed regulating valve which comprises a valve seat and an air cylinder assembly installed on the valve seat, and the air cylinder assembly comprises a first air cylinder sleeve, a second air cylinder sleeve and piston assemblies installed in the first air cylinder sleeve and the second air cylinder sleeve. A connecting block is arranged between the first cylinder sleeve and the second cylinder sleeve, and a through hole is formed in the connecting block; the piston assembly comprises a piston rod and a sealing support installed at one end of the piston rod. An adjusting sleeve is arranged on the first cylinder sleeve, a positioning nut is mounted on the adjusting sleeve, and a ventilation plug is arranged at the front end of the adjusting sleeve; the adjusting sleeve extends into the first air cylinder sleeve and makes contact with the sealing support, and one end of the piston rod is located in the adjusting sleeve. Through positioning of the positioning nut, the action range distance of the piston is adjustable; the valve is simple to adjust, the stroke is adjustable due to the double-cylinder design, automatic fast filling or slow filling can be realized without frequent disassembly and assembly, and the filling device is flexible, practical and convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of speed control valves, and particularly to an adjustable double-stroke speed control valve. Background Art

[0002] In general filling situations, the effect of current limiting can be achieved by adding a current limiting plate to the front-end pipeline of filling. However, the current limiting plate adjusts the effect by the size of the throttle hole and does not have an adjustable effect. In actual applications, it is necessary to match different liquid flow rates for different usage scenarios. During the filling process of carbonated beverages and beer, when the flow rate is too fast, the gas in the carbonated beverages and beer will be released, resulting in the phenomenon of anti-foaming in the bottle after filling. In order to prevent anti-foaming during the filling process, the prior art uses a speed control valve to reduce the filling speed. However, for different types of carbonated beverages and beer, the prior art speed control valves need to adjust the distance of the piston inside the valve, and adjusting the distance of the piston inside the valve requires disassembling and reinstalling the speed control valve, which is time-consuming and laborious. Most speed control valves set the flow rate according to the thickness of the buffer pad, and there are inconveniences in adjustment. Each time the adjustment stroke is made, it is necessary to disassemble the fastening screws to replace the buffer pads with different thicknesses and then conduct debugging. Frequently disassembling the speed control valve will also cause the sealing ring to wear and affect the sealing performance. In addition, most of some speed control valves are controlled by a single cylinder and require precise stroke control technology to achieve the fast or slow passage of the controlled flow rate. The method of using a gas-driven diaphragm to push the piston rod has problems of being not durable and leaking air after aging. Therefore, the current speed control valves for filling are not suitable for high-speed filling scenarios. Summary of the Invention

[0003] In order to overcome the above deficiencies in the prior art, the object of the present invention is to provide an adjustable double-stroke speed control valve, which is positioned by a positioning nut, and the movement amplitude distance of the piston is adjustable; the speed control valve is simple, with a double-cylinder design and adjustable stroke, and can achieve automatic fast filling or slow filling without frequent disassembly and reinstallation. At the same time, the driving diaphragm structure is abandoned, and a sealing bracket etc. is used to replace the original diaphragm to improve durability.

[0004] To achieve the above object, a technical solution of the present invention provides an adjustable double-stroke speed control valve, which includes a valve seat and a cylinder assembly installed on the valve seat. The cylinder seat assembly includes a first cylinder sleeve, a second cylinder sleeve, and a piston assembly installed in the first cylinder sleeve and the second cylinder sleeve. A connecting block is provided between the first cylinder sleeve and the second cylinder sleeve, and a through hole is provided on the connecting block. The piston assembly includes a piston rod and a sealing bracket installed at one end of the piston rod. An adjusting sleeve is provided on the first cylinder sleeve, a positioning nut is installed on the adjusting sleeve, and an air vent plug is provided at the front end of the adjusting sleeve. The adjusting sleeve extends into the first cylinder sleeve and contacts the sealing bracket, and one end of the piston rod is located inside the adjusting sleeve. The first cylinder sleeve is hermetically connected to the connecting block to form a first cylinder chamber. The second cylinder sleeve is hermetically connected to the connecting block to form a second cylinder chamber. One end of the piston rod with the sealing bracket passes through the through hole and is located in the first cylinder chamber, and the other end of the piston rod passes through the second cylinder chamber and extends into the valve seat.

[0005] Further, to ensure the sealing performance inside the valve, a sealing ring is provided between the piston rod passing through the connecting block and the connecting block. A nut is provided on the piston rod passing through the sealing bracket, and a gasket is provided on the piston rod between the sealing bracket and the nut.

[0006] Further, to ensure multi-stroke adjustment, a first air pipe joint is provided outside the connecting block, and an air passage communicating with the first cylinder chamber is provided inside the connecting block, and the air passage is communicated with the first air pipe joint.

[0007] Further, to ensure multi-stroke adjustment, a second air pipe joint is provided on the second cylinder sleeve, and an air passage communicating with the second cylinder chamber is also provided inside the second cylinder sleeve, and the second air pipe joint is communicated with the air passage.

[0008] Further, to ensure good sealing for controlling the flow rate of the speed control valve, a sealing diaphragm is provided at one end of the piston rod located inside the valve seat. One end of the sealing diaphragm is fixed at the connection between the second cylinder sleeve and the valve seat and is sealed by an O-ring.

[0009] Further, to ensure smooth movement of the piston rod, a sleeve is provided between the piston rod extending out of the second cylinder sleeve and the second cylinder sleeve.

[0010] Further, the valve seat is provided with a fluid inlet and a fluid outlet.

[0011] Further, to ensure that the piston can achieve multi-stroke control, a sealing stop block is provided on the piston rod inside the second cylinder chamber, and a Gleitring is provided between the sealing stop block and the inner wall of the second cylinder sleeve. A spring is provided between the sealing stop block and the connecting block.

[0012] Further, the piston assembly can perform radial movement in the first cylinder sleeve, the connecting block, and the second cylinder sleeve.

[0013] The beneficial effects of the present invention are as follows: An adjustable double-stroke speed control valve includes a valve seat and a cylinder assembly installed on the valve seat. A piston assembly is provided inside the cylinder assembly. The cylinder assembly is composed of two sets of cylinder sleeves and a connecting block. After the first cylinder sleeve is hermetically connected to the connecting block, a first cylinder chamber is formed. After the second cylinder sleeve is hermetically connected to the connecting block, a second cylinder chamber is formed. The piston assembly includes a piston rod and a sealing bracket installed at one end of the piston rod. By providing an adjusting sleeve at one end of the first cylinder sleeve, a positioning nut for adjusting the adjusting sleeve is installed on the adjusting sleeve. The adjusted adjusting sleeve can be fixed through the positioning nut. The adjusting sleeve is screwed into the first cylinder sleeve through threads and contacts the sealing bracket located inside the first cylinder sleeve. When there is no air in both cylinder chambers, under the action of a spring, the end of the piston rod with a sealing diaphragm is pressed against the fluid inlet at the front end of the valve seat to reach the valve-closed state. When high-pressure gas is filled into the first cylinder chamber, it will drive the sealing bracket to move, thereby driving the piston rod to move. At this time, the valve state is slow. During use, the displacement stroke of the sealing bracket can be limited through the adjusting sleeve to control the slow filling stroke of the speed control valve to achieve precise control. A sealing block is provided on the piston rod inside the second cylinder chamber. When high-pressure gas is filled into the second cylinder chamber, it will push the sealing block to move, thereby driving the piston rod to move. At this time, the valve state is fast. The present invention positions the adjusting sleeve through the positioning nut, making the movement amplitude distance of the piston adjustable. Only by simply adjusting the adjusting sleeve can the fast and slow filling be selected. The valve adjustment is simple. With a double-cylinder design and adjustable stroke, automatic fast filling or slow filling can be achieved without frequent disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present invention will be described in detail by the following preferred embodiments and accompanying drawings.

[0015] Figure 1 is a schematic diagram of the overall structure of an adjustable double-stroke speed control valve of the present invention; Figure 2 is a schematic diagram of the structure of an adjustable double-stroke speed control valve of the present invention in the slow state; Figure 3 is a schematic diagram of the structure of an adjustable double-stroke speed control valve of the present invention in the fast state; Figure 4 is a schematic diagram of the structure of an adjustable double-stroke speed control valve of the present invention in the valve-closed state.

[0016] In the figure: valve seat 1, cylinder assembly 2, first cylinder sleeve 3, second cylinder sleeve 4, piston assembly 5, connecting block 6, through hole 61, piston rod 51, sealing bracket 52, adjusting sleeve 7, positioning nut 71, vent plug 72, first cylinder chamber 31, second cylinder chamber 41, sealing ring 8, nut 53, gasket 54, first air pipe joint 62, air passage 63, second air pipe joint 42, air channel 43, sealing diaphragm 511, O-ring 9, sleeve 44, fluid inlet 11, fluid outlet 12, sealing block 55, Gleitring 551, spring 552, long screw 10. Embodiment

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, hermetically connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0019] The following further describes a kind of adjustable double-stroke speed control valve of the present invention with reference to the accompanying drawings: As Figures 1-4 shown, a kind of adjustable double-stroke speed control valve includes a valve seat 1 and a cylinder assembly 2 installed on the valve seat 1. The valve seat 1 and the cylinder assembly 2 are fixedly connected by a long screw 10. The cylinder seat assembly 2 includes a first cylinder sleeve 3, a second cylinder sleeve 4, and a piston assembly 5 installed in the first cylinder sleeve 3 and the second cylinder sleeve 4. A connecting block 6 is provided between the first cylinder sleeve 3 and the second cylinder sleeve 4. The first cylinder sleeve 3, the second cylinder sleeve 4, and the connecting block 6 are fixedly connected by a long screw 10. A through hole 61 is provided on the connecting block 6. The piston assembly 5 can move within the first cylinder sleeve 3, the connecting block 6, and the second cylinder sleeve 4. The first cylinder sleeve 3 and the connecting block 6 are hermetically connected to form a first cylinder chamber 31; the second cylinder sleeve 4 and the connecting block 6 are hermetically connected to form a second cylinder chamber 41, wherein the maximum stroke distance in the first cylinder chamber 31 is less than the maximum stroke distance in the second cylinder chamber 41. The maximum stroke distance is the effective stroke distance of the sealing bracket in the first cylinder chamber and the effective stroke distance of the sealing block in the second cylinder chamber; In this embodiment, a first air pipe joint 62 is further provided outside the connecting block 6, and an air passage 63 communicating with the first cylinder cavity 31 is provided inside. The air passage 63 is communicated with the first air pipe joint 62. High-pressure gas can be injected into the first cylinder cavity through the first air pipe joint to drive the piston to move. A second air pipe joint 42 is provided on the second cylinder sleeve 4, and an air passage 43 communicating with the second cylinder cavity 41 is further provided inside the second cylinder sleeve 4. The second air pipe joint 42 is communicated with the air passage 43. High-pressure gas can be injected into the second cylinder cavity through the second air pipe joint to realize the multi-stroke movement of the piston assembly.

[0020] In this embodiment, the piston assembly 5 includes a piston rod 51 and a sealing bracket 52 installed at one end of the piston rod 51. A seal (not marked) is used for sealing between the sealing bracket 52 and the piston rod 51. A nut 53 is provided on the piston rod 51 passing through the sealing bracket 52. A gasket 54 with an adjustable stroke is provided on the piston rod between the sealing bracket 52 and the nut 53. The sealing bracket can move on the piston rod, and a seal is used for sealing between the sealing bracket and the piston rod. The distance between the gasket and the sealing bracket can be pre-adjusted through the nut for fine adjustment. The stroke of the piston rod is fine-tuned through the gasket. The stroke is adjusted before leaving the factory and cannot be fine-tuned on site. One end of the piston rod 51 with the sealing bracket 52 passes through the through hole 61 and is located in the first cylinder cavity 31, and the other end passes through the second cylinder cavity 41 and extends into the valve seat 1. The piston rod 51 extends out of the second cylinder sleeve 4 and a sleeve 44 that can reduce friction is provided between the piston rod 51 and the second cylinder sleeve 4. At the same time, the position where the piston rod 51 passes through the second cylinder sleeve 4 is sealed by a seal ring 8, and the sealing bracket and the inner wall of the first cylinder sleeve are sealed by a seal ring 8. One end of the piston rod 51 located in the valve seat 1 is provided with a sealing diaphragm 511. One end of the sealing diaphragm 511 is fixed at the connection between the second cylinder sleeve 3 and the valve seat 1 and is sealed by an O-ring 9 to improve the sealing performance. An adjusting sleeve 7 is provided on one side of the first cylinder sleeve 3. A positioning nut 71 is installed on the adjusting sleeve 7. The front end of the adjusting sleeve 7 is provided with a vent plug 72. The adjusting sleeve 7 extends into the first cylinder sleeve 3 and contacts the sealing bracket 52 to hold the sealing bracket, thereby realizing the limiting effect on the piston rod. One end of the piston rod 51 is located inside the adjusting sleeve 7. Since the adjusting sleeve is hollow in the middle, the piston rod will not be blocked inside the adjusting sleeve. The movement amplitude of the piston assembly is adjusted through the adjusting sleeve, and the positioning nut positions the adjusting sleeve. The distance of the adjusting sleeve is adjustable, so the stroke of the piston can be controlled, and the valve adjustment method is simple and convenient. In this embodiment, a seal ring 8 is provided between the piston rod 51 passing through the connecting block 6 and the connecting block 61 to enhance the sealing performance. A fluid inlet 11 and a fluid outlet 12 are provided on the valve seat 1. The sealing diaphragm can close the fluid inlet 11 when the valve is closed, thereby realizing the opening and closing of the valve.

[0021] In this embodiment, a sealing block 55 is provided on the piston rod 51 in the second cylinder cavity 41. A Gleitring 551 is provided between the sealing block 55 and the inner wall of the second cylinder sleeve 4 to form a sealed space; a spring 552 is provided between the sealing block 55 and the connecting block 6. When the first cylinder cavity and the second cylinder cavity are not ventilated, the piston extends in the normal state, and the piston rod is pressed by the spring to the valve closing state.

[0022] Working principle: Slow filling state: As Figure 2 shown, the first cylinder cavity is ventilated, and the second cylinder cavity is not ventilated. The movement amplitude of the piston rod is positioned by the positioning nut. By adjusting the adjusting sleeve, its stroke distance is adjustable. When the adjusting sleeve rotates inward and is positioned, the distance between the adjusting sleeve and the sealing bracket is reduced, so that the effective movement stroke of the piston rod is reduced. After the adjusting sleeve rotates outward and is positioned, the distance between the adjusting sleeve and the sealing bracket is increased, and the effective movement stroke of the piston rod is increased, thereby realizing the adjustment of the stroke and enabling the valve to be adjusted in the slow state. The positioning nut on the adjusting sleeve plays a role in fixing the adjustment distance of the adjusting sleeve; Fast filling state: As Figure 3 shown, first, the adjusting sleeve can be selected to be adjusted to the lowest end and the sealing bracket is fixed. Then, the second cylinder cavity is ventilated. The sealing block and the second cylinder cavity are airtight. Driven by the air pressure, after the piston rod exceeds the elastic limit of the spring, it displaces to the left, and the displacement amplitude of the piston rod reaches the maximum stroke. The distance between the sealing diaphragm and the junctions of the fluid inlet 11 and the fluid outlet 12 is the largest, realizing fast filling; Valve closing state: As Figure 4 shown, neither the first cylinder cavity nor the second cylinder cavity is ventilated. The piston rod is pressed by the spring to the valve closing state, and the sealing diaphragm at the front end of the piston rod extends out to block the fluid inlet 11, realizing valve closing.

[0023] The present invention discloses an adjustable double-stroke speed regulating valve, comprising a valve seat, a cylinder assembly mounted on the valve seat, a piston assembly arranged in the cylinder assembly, the cylinder assembly consisting of two groups of cylinder sleeves and a connecting block, a first cylinder sleeve and a connecting block are sealed and connected to form a first cylinder cavity, a second cylinder sleeve and a connecting block are sealed and connected to form a second cylinder cavity, the piston assembly comprises a piston rod and a sealing bracket arranged at one end of the piston rod; an adjusting sleeve is arranged at one end of the first cylinder sleeve, a positioning nut for adjusting the adjusting sleeve is arranged on the adjusting sleeve, the adjusted adjusting sleeve can be fixed by the positioning nut, the adjusting sleeve is screwed into the first cylinder sleeve through a thread and is located in the first cylinder sleeve The sealing bracket contacts the valve seat, and when there is no ventilation in the two cylinder chambers, the end of the piston rod with the sealing diaphragm is squeezed to the fluid inlet at the front end of the valve seat under the action of the spring to achieve the valve closing state; when the first cylinder chamber is filled with high-pressure gas, it will drive the sealing bracket to move and thus drive the piston rod to move. At this time, the valve state is slow. During use, the displacement stroke of the sealing bracket can be limited by the adjustment sleeve to control the slow filling stroke of the speed regulating valve to achieve precise control; a sealing block is provided on the piston rod in the second cylinder chamber. When the second cylinder chamber is filled with high-pressure gas, the sealing block will be pushed to move, thereby driving the piston rod to move. At this time, the valve state is fast. The present invention positions the adjustment sleeve by a positioning nut, so that the piston action amplitude distance is adjustable. Only the adjustment sleeve needs to be simply adjusted to achieve the selection of fast or slow filling. The valve adjustment is simple, the double cylinder design has an adjustable stroke, and automatic fast filling or slow filling can be achieved without frequent disassembly and assembly. It is smart, practical and easy to use.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable double-stroke speed control valve, characterized in that, It includes a valve seat and a cylinder assembly mounted on the valve seat. The cylinder seat assembly includes a first cylinder sleeve, a second cylinder sleeve, and a piston assembly installed in the first and second cylinder sleeves. A connecting block is provided between the first cylinder sleeve and the second cylinder sleeve, and a through hole is provided on the connecting block. The piston assembly includes a piston rod and a sealing bracket installed at one end of the piston rod. An adjusting sleeve is provided on the first cylinder sleeve, a positioning nut is installed on the adjusting sleeve, and an air vent plug is provided at the front end of the adjusting sleeve. The adjusting sleeve extends into the first cylinder sleeve and contacts the sealing bracket, and one end of the piston rod is located inside the adjusting sleeve. The first cylinder sleeve is hermetically connected to the connecting block to form a first cylinder chamber. The second cylinder sleeve is hermetically connected to the connecting block to form a second cylinder chamber. One end of the piston rod with the sealing bracket passes through the through hole and is located in the first cylinder chamber, and the other end of the piston rod passes through the second cylinder chamber and extends into the valve seat.

2. The adjustable double-stroke speed control valve according to claim 1, wherein: The piston rod passes through the connecting block and a sealing ring is provided between the piston rod and the connecting block. A nut is provided on the piston rod passing through the sealing bracket, and a gasket is provided on the piston rod between the sealing bracket and the nut.

3. An adjustable double-stroke speed control valve according to claim 1, characterized in that: A first air pipe joint is provided outside the connecting block, and an air passage communicating with the first cylinder chamber is provided inside the connecting block, and the air passage is communicated with the first air pipe joint.

4. The adjustable double-stroke speed control valve according to claim 1, wherein: A second air pipe joint is provided on the second cylinder sleeve, and an air passage communicating with the second cylinder chamber is also provided inside the second cylinder sleeve, and the second air pipe joint is communicated with the air passage.

5. An adjustable double-stroke speed control valve according to claim 1, characterized in that: One end of the piston rod located in the valve seat is provided with a sealing diaphragm, and one end of the sealing diaphragm is fixed at the connection between the second cylinder sleeve and the valve seat and is sealed by an O-ring.

6. The adjustable double-stroke speed control valve according to claim 1, wherein: The piston rod extends out of the second cylinder sleeve and a sleeve is provided between the piston rod and the second cylinder sleeve.

7. An adjustable double-stroke speed control valve according to claim 5, characterized in that: The valve seat is provided with a fluid inlet and a fluid outlet.

8. An adjustable double-stroke speed control valve according to claim 1, characterized in that: A sealing block is provided on the piston rod in the second cylinder chamber, and a Gleitring is provided between the sealing block and the inner wall of the second cylinder sleeve. A spring is provided between the sealing block and the connecting block.

9. The adjustable double-stroke speed control valve according to claim 8, characterized in that: The sealing bracket is located in the first cylinder chamber, and the sealing block is located in the second cylinder chamber, and the maximum effective stroke distance of the sealing bracket in the first cylinder chamber is less than the maximum stroke distance of the sealing block in the second cylinder chamber.

10. The adjustable double-stroke speed control valve according to claim 1, characterized in that: The piston assembly can move radially in the first cylinder sleeve, the connecting block, and the second cylinder sleeve.

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