Adjustable double-stroke speed regulating valve

Abstract

The utility model 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. According to the utility model, through positioning of the positioning nut, the motion 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 utility model relates to the technical field of speed regulating valves, in particular to an adjustable double-stroke speed regulating valve. Background Art

[0002] Under normal filling conditions, the flow limiting effect can be achieved by adding a flow limiting plate to the front end of the filling pipeline. However, the flow limiting plate achieves the adjustment effect through the size of the throttle hole and has no regulating effect. In actual application, different liquid flow rates need to be matched 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, causing backbubbling in the bottle after filling. In order to prevent backbubbling during the filling process, the existing technology uses a speed regulating valve to reduce the filling speed. However, the existing speed regulating valve needs to adjust the piston distance in the valve for different types of carbonated beverages and beer. Adjusting the piston distance in the valve requires reassembling the speed regulating valve, which is time-consuming and labor-intensive. Most speed regulating valves set the flow rate according to the thickness of the buffer pad, which is inconvenient to adjust. Each time the stroke is adjusted, the fastening screws need to be removed to replace the buffer pad of different thicknesses and then debug. Frequent disassembly of the speed regulating valve will also cause wear of the sealing ring and affect the sealing performance. In addition, some speed regulating valves are mostly controlled by a cylinder, which requires precise stroke control technology to achieve fast or slow flow control. The method of using a gas-driven diaphragm to push the piston rod is not durable and leaks after aging. Therefore, the current speed regulating valve for filling is not suitable for high-speed filling scenarios. Summary of the Invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide an adjustable two-stroke speed control valve, which is positioned by a positioning nut and the piston movement amplitude and distance are adjustable; the valve is simple to adjust, has a dual-cylinder design, and has an adjustable stroke. It does not require frequent disassembly and assembly, and can achieve automated fast filling or slow filling. At the same time, the drive diaphragm structure is abandoned, and a sealing bracket is used instead of the original diaphragm to improve durability.

[0004] To achieve the above-mentioned objectives, the present technical solution provides an adjustable two-stroke speed control valve, comprising a valve seat and a cylinder assembly installed on the valve seat, the cylinder assembly comprising 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 comprises 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 a vent plug is provided at the front end of the adjusting sleeve; the adjusting sleeve extends into the first cylinder sleeve and contacts with the sealing bracket, and one end of the piston rod is located in the adjusting sleeve; the first cylinder sleeve is sealedly connected to the connecting block to form a first cylinder cavity; the second cylinder sleeve is sealedly connected to the connecting block to form a second cylinder cavity; one end of the piston rod with the sealing bracket passes through the through hole and is located in the first cylinder cavity, and the other end of the piston rod passes through the second cylinder cavity and extends into the valve seat.

[0005] Furthermore, to ensure the sealing inside the valve, the piston rod passes through the connecting block and a sealing ring is provided between the piston rod and the connecting block; the piston rod passes through a sealing bracket and a nut is provided, and a gasket is provided on the piston rod between the sealing bracket and the nut.

[0006] Furthermore, in order to ensure multi-stroke adjustment, a first air pipe joint is provided on the outside of the connecting block, and an air passage connected to the first cylinder cavity is provided on the inside, and the air passage is connected to the first air pipe joint.

[0007] Furthermore, 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 further provided in the second cylinder sleeve, and the second air pipe joint communicates with the air passage.

[0008] Furthermore, to ensure good sealing of the flow rate controlled by the speed regulating valve, a sealing diaphragm is provided at one end of the piston rod located in 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] Furthermore, in order to ensure smooth movement of the piston rod, the piston rod extends out of the second cylinder liner and a sleeve is provided between the piston rod and the second cylinder liner.

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

[0011] Furthermore, to ensure that the piston can achieve multi-stroke control, a sealing block is provided on the piston rod in the second cylinder chamber, and a grid ring 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.

[0012] Furthermore, the piston assembly can move radially in the first cylinder liner, the connecting block, and the second cylinder liner.

[0013] The beneficial effects of the utility model are as follows: an adjustable two-stroke speed regulating valve comprises a valve seat, a cylinder assembly mounted on the valve seat, a piston assembly is arranged in the cylinder assembly, the cylinder assembly is composed of two groups of cylinder sleeves and a connecting block, the first cylinder sleeve is sealed and connected to the connecting block to form a first cylinder cavity, the second cylinder sleeve is sealed and connected to the connecting block to form a second cylinder cavity, the piston assembly comprises a piston rod and a sealing bracket mounted on one end of the piston rod; an adjusting sleeve is provided 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 by the positioning nut, the adjusting sleeve is screwed into the first cylinder sleeve through a thread and is connected to the first cylinder sleeve through a thread. The sealing bracket in one cylinder sleeve is in contact with the other. When there is no ventilation in either cylinder chamber, the end of the piston rod with the sealing diaphragm is squeezed to the fluid inlet at the front end of the valve seat by the action of the spring to achieve the valve closing 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 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 high-pressure gas is filled into the second cylinder chamber, the sealing block is pushed to move, thereby driving the piston rod to move. At this time, the valve state is fast. The utility model positions the adjustment sleeve by a positioning nut, so that the piston movement amplitude distance is adjustable. Only by simply adjusting the adjustment sleeve can the fast or slow filling selection be realized. The valve adjustment is simple, the double-cylinder design has an adjustable stroke, and no frequent disassembly and assembly are required to realize automatic fast filling or slow filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] For ease of explanation, the present invention is described in detail with reference to the following preferred embodiments and accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of an adjustable two-stroke speed regulating valve of the utility model;

[0016] Figure 2 This is a structural diagram of an adjustable two-stroke speed regulating valve in a slow state according to the utility model;

[0017] Figure 3 This is a structural diagram of an adjustable two-stroke speed regulating valve in a fast state of the utility model;

[0018] Figure 4 The utility model is a structural schematic diagram of an adjustable double-stroke speed regulating valve in a closed valve state.

[0019] In the figure: valve seat 1, cylinder assembly 2, first cylinder liner 3, second cylinder liner 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 channel 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, grid ring 551, spring 552, long screw 10. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections, sealed connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0022] The adjustable two-stroke speed regulating valve of the utility model is further described below with reference to the accompanying drawings:

[0023] like Figure 1-4An adjustable two-stroke speed regulating valve is shown, comprising a valve seat 1, a cylinder assembly 2 mounted on the valve seat 1, the valve seat 1 and the cylinder assembly 2 being fixedly connected by a long screw 10, the cylinder assembly 2 comprising a first cylinder liner 3, a second cylinder liner 4 and a piston assembly 5 mounted in the first cylinder liner 3 and the second cylinder liner 4, a connecting block 6 being provided between the first cylinder liner 3 and the second cylinder liner 4, the first cylinder liner 3, the second cylinder liner 4 and the connecting block 6 being fixedly connected by a long screw 10, a through hole 61 being provided on the connecting block 6, the piston assembly 5 being movable in the first cylinder liner 3, the connecting block 6 and the second cylinder liner 4, the first cylinder liner 3 and the connecting block 6 being sealedly connected to form a first cylinder chamber 31; the second cylinder liner 4 and the connecting block 6 being sealedly connected to form a second cylinder chamber 41, wherein the maximum stroke distance in the first cylinder chamber 31 is smaller than the maximum stroke distance in the second cylinder chamber 41, and 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;

[0024] In this embodiment, a first air pipe joint 62 is further provided on the outside of the connecting block 6, and an air channel 63 connected to the first cylinder chamber 31 is provided inside. The air channel 63 is connected to the first air pipe joint 62, and high-pressure gas can be injected into the first cylinder chamber through the first air pipe joint to promote the movement of the piston; a second air pipe joint 42 is provided on the second cylinder sleeve 4, and an air channel 43 connected to the second cylinder chamber 41 is also provided in the second cylinder sleeve 4. The second air pipe joint 42 is connected to the air channel 43, and high-pressure gas can be injected into the second cylinder chamber through the second air pipe joint to realize multi-stroke movement of the piston assembly.

[0025] 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. The sealing bracket 52 and the piston rod 51 are sealed by a sealing ring (not shown). The piston rod 51 passes through the sealing bracket 52 and is provided with a nut 53. A stroke-adjustable gasket 54 is provided on the piston rod between the sealing bracket 52 and the nut 53. The sealing bracket can move on the piston rod. The sealing bracket and the piston rod are sealed by the sealing ring. The distance between the gasket and the sealing bracket can be pre-adjusted by the nut for fine-tuning. The stroke of the piston rod is fine-tuned by means of a gasket. The stroke is adjusted before leaving the factory and cannot be fine-tuned on site. The piston rod 51 is provided with a sealing bracket 52. One end of the sealing bracket passes through the through hole 61 and is located in the first cylinder chamber 31. The other end passes through the second cylinder chamber 41 and extends into the valve seat 1. The piston rod 51 extends out of the second cylinder liner 4 and a sleeve 44 is provided between the piston rod 51 and the second cylinder liner 4 to reduce friction. At the same time, the position where the piston rod 51 passes through the second cylinder liner 4 is sealed by a sealing ring 8. The sealing bracket and the inner wall of the first cylinder liner are also sealed by a sealing ring 8.

[0026] The end of the piston rod 51 located in the valve seat 1 is provided with a sealing diaphragm 511, one end of which 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;

[0027] An adjusting sleeve 7 is provided on one side of the first cylinder sleeve 3. A positioning nut 71 and an adjusting sleeve are installed on the adjusting sleeve 7. A vent plug 72 is provided at the front end of the adjusting sleeve 7. The adjusting sleeve 7 extends into the first cylinder sleeve 3 and contacts the sealing bracket 52, which supports the sealing bracket to limit the piston rod. One end of the piston rod 51 is located in the adjusting sleeve 7. Because the adjusting sleeve is centrally controlled, the piston rod will not be blocked in the adjusting sleeve. The action amplitude of the piston assembly can be adjusted by the adjusting sleeve. The positioning nut positions the adjusting sleeve. The distance of the adjusting sleeve is adjustable, so the stroke of the piston can be controlled. The valve adjustment method is simple and convenient.

[0028] In this embodiment, the piston rod 51 passes through the connecting block 6 and a sealing ring 8 is provided between the piston rod 51 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, and the sealing diaphragm can seal the fluid inlet 11 when the valve is closed, thereby realizing the opening and closing of the valve.

[0029] In this embodiment, a sealing block 55 is provided on the piston rod 51 in the second cylinder chamber 41, and a grid ring 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 chamber and the second cylinder chamber are not ventilated, the piston is extended in normal state, and the piston rod is squeezed to the valve closing state by the spring.

[0030] Working principle:

[0031] Slow filling state: Figure 2 As shown, the first cylinder chamber is ventilated, and the second cylinder chamber is not ventilated. The movement amplitude of the piston rod is positioned by the positioning nut. By adjusting the adjusting sleeve, the stroke distance is adjustable. When the adjusting sleeve is rotated inward to position, the distance between the adjusting sleeve and the sealing bracket is reduced, thereby reducing the effective movement stroke of the piston rod. When the adjusting sleeve is rotated outward to position, 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 adjustable stroke and adjusting the slow state of the valve. The positioning nut on the adjusting sleeve plays the role of fixing the adjustment sleeve to adjust the distance.

[0032] Fast filling status: Figure 3 As shown, first, the adjustment sleeve can be optionally adjusted to the lowest end and the sealing bracket is fixed. Then, the second cylinder chamber is ventilated. The sealing block and the second cylinder chamber are sealed with each other. Driven by the air pressure, the piston rod exceeds the elastic limit of the spring and moves to the left. The piston rod displacement amplitude reaches the maximum stroke. The distance between the sealing diaphragm and the intersection of the fluid inlet 11 and the fluid outlet 12 is maximized, achieving rapid filling.

[0033] Valve closing status: Figure 4 As shown, both the first cylinder chamber and the second cylinder chamber are airless, 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 to block the fluid inlet 11, thereby closing the valve.

[0034] The utility model discloses an adjustable two-stroke speed regulating valve, comprising a valve seat, a cylinder assembly mounted on the valve seat, a piston assembly provided in the cylinder assembly, the cylinder assembly consisting of two groups of cylinder sleeves and a connecting block, a first cylinder chamber is formed after the first cylinder sleeve is sealed and connected to the connecting block, and a second cylinder chamber is formed after the second cylinder sleeve is sealed and connected to the connecting block, the piston assembly comprises a piston rod and a sealing bracket mounted on one end of the piston rod; an adjusting sleeve is provided at one end of the first cylinder sleeve, a positioning nut for adjusting the adjusting sleeve is mounted 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 positioned at the first cylinder sleeve. When the two cylinder chambers are not ventilated, the end of the piston rod with the sealing diaphragm is squeezed to the fluid inlet at the front end of the valve seat by 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, it will push the sealing block to move, thereby driving the piston rod to move. At this time, the valve state is fast. The utility model positions the adjustment sleeve by a positioning nut, so that the piston movement amplitude distance can be adjusted. Only by simply adjusting the adjustment sleeve can the fast or slow filling selection be achieved. The valve adjustment is simple, the double-cylinder design has an adjustable stroke, and can achieve automatic fast filling or slow filling without frequent disassembly and assembly. It is smart, practical and easy to use.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An adjustable two-stroke speed regulating valve, characterized in that: It includes a valve seat and a cylinder assembly installed on the valve seat, the cylinder assembly includes a first cylinder liner, a second cylinder liner and a piston assembly installed in the first cylinder liner and the second cylinder liner, a connecting block is provided between the first cylinder liner and the second cylinder liner, 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 liner, a positioning nut is installed on the adjusting sleeve, and a vent plug is provided at the front end of the adjusting sleeve; the adjusting sleeve extends into the first cylinder liner and contacts with the sealing bracket, and one end of the piston rod is located in the adjusting sleeve; the first cylinder liner is sealed and connected to the connecting block to form a first cylinder cavity; the second cylinder liner is sealed and connected to the connecting block to form a second cylinder cavity; one end of the piston rod with the sealing bracket passes through the through hole and is located in the first cylinder cavity, and the other end of the piston rod passes through the second cylinder cavity and extends into the valve seat.

2. The adjustable two-stroke speed regulating valve according to claim 1, characterized in that: The piston rod passes through the connecting block and a sealing ring is provided between the piston rod and the connecting block; the piston rod passes through a sealing bracket and a nut is provided, and a gasket is provided on the piston rod between the sealing bracket and the nut.

3. The adjustable two-stroke speed regulating valve according to claim 1, characterized in that: The connecting block is provided with a first air pipe joint on the outside and an air passage communicating with the first cylinder cavity on the inside, and the air passage is communicated with the first air pipe joint.

4. The adjustable two-stroke speed regulating valve according to claim 1, characterized in that: 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 in the second cylinder sleeve, and the second air pipe joint is connected with the air passage.

5. The adjustable two-stroke speed regulating valve according to claim 1, characterized in that: A sealing diaphragm is provided at one end of the piston rod located in 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.

6. The adjustable two-stroke speed regulating valve according to claim 1, characterized in that: 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. The adjustable two-stroke speed regulating valve according to claim 5, characterized in that: The valve seat is provided with a fluid inlet and a fluid outlet.

8. The adjustable two-stroke speed regulating valve according to claim 1, characterized in that: A sealing block is provided on the piston rod in the second cylinder cavity, and a Gly ring 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 two-stroke speed regulating valve according to claim 8, characterized in that: The sealing bracket is located in the first cylinder cavity and the sealing block is located in the second cylinder cavity, wherein the maximum effective travel distance of the sealing bracket in the first cylinder cavity is smaller than the maximum travel distance of the sealing block in the second cylinder cavity.

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

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