Piston type wind pressure adjusting device

Abstract

A piston type wind pressure adjusting device relates to the technical field of wind pressure balance and comprises a driving motor arranged outside a pipeline, the pipeline comprises a section of reducer pipe, a telescopic push rod is fixedly mounted in the reducer pipe, and the driving motor is connected with the telescopic push rod through a transmission mechanism. One end of the telescopic push rod is connected with a conical valve element used for being matched with the reducer pipe, and when the telescopic push rod drives the conical valve element to move, the overflowing area between the conical valve element and the reducer pipe can be changed. According to the wind pressure balancing device, a mechanism needing displacement is arranged in the pipeline, so that the problems of frequent faults, difficulty in processing and manufacturing, high sealing material cost, high maintenance cost and the like caused by a complicated dynamic sealing structure in an original wind pressure balancing device are solved, and the wind pressure balancing device is stable and reliable in practical application; and the sealing device can also be applied to various occasions where moving parts need to be arranged in fluid and reliable sealing is needed, and has very high popularization value.

Description

Technical Field

[0001] The utility model relates to the technical field of wind pressure balance, in particular to a piston type wind pressure regulating device. Background Art

[0002] In the dust removal system of cigarette making machines in cigarette factories, the air pressure balancer plays the role of regulating the negative pressure inside the cigarette making machine, so that the negative pressure remains stable within a certain range. Currently, the air pressure balancers used in the dust removal system of cigarette making machines use butterfly valve structures or reducer with conical valve core structures. The two structures use different driving methods. The butterfly valve is directly driven by a servo motor with a reducer, or driven by a servo motor with a synchronous belt and synchronous wheel. The adjustment performance of the butterfly valve structure is limited. The more commonly used is the reducer with a conical valve core structure, which is driven by a servo motor with a screw guide rail. This type of structure is Figure 1 shown.

[0003] In this structure, a drive motor drives the guide rod through the drive screw nut. The guide rod is connected to the guide rod by a nut-guide rod connector. The conical valve core is further connected to the guide rod by a valve core connector rod. This electrically actuated conical valve core performs linear motion within the reducer valve body within a certain range of travel. By varying the flow area between the conical head of the conical valve core and the conical surface of the reducer valve body, the flow rate within the pipeline is adjusted, achieving a stable negative pressure at the working end. This structure requires a dynamic seal between the valve core connector rod and the outer shell of the reducer valve body to ensure a seal between the valve core connector rod and the external environment while the valve core connector rod moves linearly. Because this seal has a large sealing area and the moving parts move relative to the valve body over a relatively long travel range, it places high demands on the seal's precision and material wear resistance. Because the airflow within the valve body contains a certain amount of dust, seal resistance increases and even becomes stuck in actual use. Therefore, the device requires regular cleaning after a period of operation, increasing manufacturing and maintenance costs. Utility Model Content

[0004] The purpose of the utility model is to provide a piston-type air pressure regulating device, so that the mechanism that needs to be displaced is arranged inside the pipeline, thereby avoiding a complex dynamic sealing structure and making the equipment run more reliably.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a piston-type air pressure regulating device, comprising a driving motor arranged outside a pipeline, the pipeline comprising a section of a reducer, a telescopic push rod fixedly installed inside the reducer, the driving motor being connected to the telescopic push rod through a transmission mechanism, one end of the telescopic push rod being connected to a conical valve core for cooperating with the reducer, and when the telescopic push rod drives the conical valve core to move, it can change the flow area between the conical valve core and the reducer.

[0006] Preferably, a fixed sleeve is coaxially installed inside the reducer, and the upper and lower ends of the fixed sleeve are respectively connected to the inner wall of the reducer through support seats. The telescopic push rod is coaxially arranged in the fixed sleeve, and the fixed sleeve is provided with a movable sleeve. The conical valve core is fixed to one end of the movable sleeve, and a guide mechanism for limiting the rotation of the movable sleeve is also provided between the movable sleeve and the fixed sleeve.

[0007] More preferably, the transmission mechanism includes a first right-angle reduction motor connected to the drive motor, a transmission connecting rod transmission-connected to the first right-angle reduction motor, a second right-angle reduction motor transmission-connected to the transmission connecting rod, and the second right-angle reduction motor transmission-connected to the telescopic push rod.

[0008] More preferably, the first right-angle reduction motor is located outside the reducer, the transmission connecting rod extends into the reducer and passes through the support seat at the upper end of the fixed sleeve, and the second right-angle reduction motor is fixedly installed between the upper and lower support seats.

[0009] More preferably, a reducing tube extends upward from the top of the support seat located at the upper end of the fixed sleeve, the first right-angle reduction motor is installed at the top of the support seat, and sealing structures are provided between the outer periphery of the support seat and the reducing tube, and between the support seat and the right-angle reduction motor.

[0010] More preferably, an O-ring is further installed on the inner wall of the movable sleeve.

[0011] More preferably, a dust-blocking felt is installed at one end of the movable sleeve and the dust-blocking felt is located at the front end of the O-ring.

[0012] Compared with the existing technology, the utility model avoids the problems of frequent failures, difficult processing and manufacturing, high cost of sealing materials, high maintenance costs, etc. caused by the complex dynamic sealing structure in the original wind pressure balancing device. It is stable and reliable in actual application and can also be used in various occasions where moving parts need to be set inside the fluid and reliable sealing is required. It has very great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of an existing wind pressure regulating device;

[0014] Figure 2 Schematic diagram of the overall structure in the embodiment.

[0015] In the picture:

[0016] 1——Drive motor 2——Transmission connecting rod 3——First right angle reduction motor

[0017] 4——Dustproof felt 5——O-ring 6——Fixed sleeve

[0018] 7——Telescopic push rod 8——Conical valve core 9——Support seat

[0019] 10——Second right-angle reduction motor 11——Reducing pipe 12——Pipeline DETAILED DESCRIPTION

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0021] It should be noted in advance that, in this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, in this utility model, unless otherwise expressly specified or limited, a first feature "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not being in direct contact but through another feature between them.

[0022] like Figures 1 to 2 As shown, a piston-type air pressure regulating device includes a drive motor 1 disposed outside a pipe 12. The pipe 12 includes a reducer 11. A telescopic push rod 7 is fixedly installed inside the reducer 11. The drive motor 1 is connected to the telescopic push rod 7 via a transmission mechanism. One end of the telescopic push rod 7 is connected to a conical valve core 8 for mating with the reducer 11. When the telescopic push rod 7 drives the conical valve core 8 to move, it can change the flow area between the conical valve core 8 and the reducer 11. By changing the flow area, the air pressure in the pipe can be regulated.

[0023] In the above structure, a fixed sleeve 6 is coaxially mounted inside the reducer 11. The upper and lower ends of the fixed sleeve 6 are connected to the inner wall of the reducer 11 via support seats 9, respectively. A telescopic push rod 7 is coaxially disposed in the fixed sleeve 6. A movable sleeve is sleeved on the fixed sleeve 6. A conical valve core 8 is fixed to one end of the movable sleeve. A guide mechanism for limiting the rotation of the movable sleeve is also provided between the movable sleeve and the fixed sleeve 6. Those skilled in the art should know that the guide mechanism can adopt a conventional structure, for example, a guide protrusion is fixedly provided on the outer wall of the fixed sleeve 6, and a groove-shaped slide rail is correspondingly provided along the axial direction on the inner wall surface of the movable sleeve to cooperate with the guide protrusion. This can both limit the self-rotation of the movable sleeve and improve the movement stability of the movable sleeve.

[0024] The transmission mechanism in this embodiment includes a first right-angle reduction motor 3 connected to the drive motor 1, a transmission link 2 transmission-connected to the first right-angle reduction motor 3, and a second right-angle reduction motor 10 transmission-connected to the transmission link 2. The second right-angle reduction motor 10 is transmission-connected to the telescopic push rod 7. The first right-angle reduction motor 3 is located outside the reducer 11, the transmission link 2 extends into the reducer 11 and passes through the support seat 9 at the upper end of the fixed sleeve 6, and the second right-angle reduction motor 10 is fixedly mounted between the upper and lower support seats 9.

[0025] To ensure airtightness, in this embodiment, a reducing tube 11 extends upward from the top of the support base 9 located at the upper end of the fixed sleeve 6. The first right-angle reduction motor 3 is mounted on the top of the support base 9. Sealing structures are provided between the outer periphery of the support base 9 and the reducing tube 11, and between the support base 9 and the right-angle reduction motor 3. The sealing structures herein can also use sealing rings or other structures commonly used in the prior art, and those skilled in the art will not encounter any technical obstacles in achieving the sealing herein.

[0026] In addition, the inner wall of the movable sleeve is also equipped with an O-type sealing ring 5. One end of the movable sleeve is also equipped with a dust-proof felt 4 and the dust-proof felt 4 is located at the front end of the O-type sealing ring 5, which can effectively prevent dust from entering and can be used for a long time in a dusty working environment.

[0027] The piston-type air pressure regulating device provided in the above embodiment utilizes a multi-stage transmission and piston rod design to transmit power to the interior of the valve core. This design replaces the irregular sealing structure and sealing material with a reliable sliding seal with a sealing ring. Furthermore, a dust-blocking felt 4 is added to the front end of the O-ring 5, significantly extending the seal life. This structural air pressure balancing device is extremely stable and reliable in practical applications. This design completely avoids the problems of frequent failures, difficult manufacturing, high sealing material costs, and high maintenance costs associated with the complex dynamic sealing structure of existing air pressure balancing devices, and thus has great potential for promotion.

[0028] In order to make it easier for ordinary technicians in this field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and the above-mentioned embodiments are better implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A piston-type air pressure regulating device, comprising a drive motor (1) arranged outside a pipe (12), wherein the pipe (12) comprises a section of a reducing pipe (11), characterized in that: A telescopic push rod (7) is fixedly installed inside the reducing tube (11), and the driving motor (1) is connected to the telescopic push rod (7) through a transmission mechanism. One end of the telescopic push rod (7) is connected to a conical valve core (8) for matching the reducing tube (11). When the telescopic push rod (7) drives the conical valve core (8) to move, the flow area between the conical valve core (8) and the reducing tube (11) can be changed.

2. The piston-type air pressure regulating device according to claim 1, characterized in that: A fixed sleeve (6) is coaxially mounted inside the reducer (11), and the upper and lower ends of the fixed sleeve (6) are connected to the inner wall of the reducer (11) through support seats (9), respectively. The telescopic push rod (7) is coaxially arranged in the fixed sleeve (6), and the fixed sleeve (6) is provided with a movable sleeve. The conical valve core (8) is fixed to one end of the movable sleeve, and a guide mechanism for limiting the rotation of the movable sleeve is also provided between the movable sleeve and the fixed sleeve (6).

3. The piston-type air pressure regulating device according to claim 2, characterized in that: The transmission mechanism comprises a first right-angle reduction motor (3) connected to the drive motor (1), a transmission link (2) transmission-connected to the first right-angle reduction motor (3), a second right-angle reduction motor (10) transmission-connected to the transmission link (2), and the second right-angle reduction motor (10) transmission-connected to the telescopic push rod (7).

4. The piston-type air pressure regulating device according to claim 3, characterized in that: The first right-angle reduction motor (3) is located outside the reducer (11), the transmission link (2) extends into the reducer (11) and passes through the support seat (9) at the upper end of the fixed sleeve (6), and the second right-angle reduction motor (10) is fixedly installed between the upper and lower support seats (9).

5. The piston-type air pressure regulating device according to claim 4, characterized in that: The top end of the support seat (9) located at the upper end of the fixed sleeve (6) extends upward through a reducer (11), the first right-angle reduction motor (3) is mounted on the top end of the support seat (9), and sealing structures are provided between the outer periphery of the support seat (9) and the reducer (11), and between the support seat (9) and the right-angle reduction motor (3).

6. The piston-type air pressure regulating device according to claim 2, characterized in that: An O-type sealing ring (5) is also installed on the inner wall of the movable sleeve.

7. The piston-type air pressure regulating device according to claim 6, characterized in that: A dust-blocking felt (4) is also installed at one end of the movable sleeve, and the dust-blocking felt (4) is located at the front end of the O-type sealing ring (5).

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