CN112797217A - Plastic driving cylinder of pneumatic diaphragm valve - Google Patents

Plastic driving cylinder of pneumatic diaphragm valve Download PDF

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Publication number
CN112797217A
CN112797217A CN202110239423.9A CN202110239423A CN112797217A CN 112797217 A CN112797217 A CN 112797217A CN 202110239423 A CN202110239423 A CN 202110239423A CN 112797217 A CN112797217 A CN 112797217A
Authority
CN
China
Prior art keywords
cylinder
valve
pneumatic diaphragm
piston
cylinder body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110239423.9A
Other languages
Chinese (zh)
Inventor
徐家毛
李新顶
王德军
石红
洪诗聪
丁运博
李林
洪进元
江云富
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Eho Valve Co ltd
Original Assignee
Shanghai Eho Valve Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Eho Valve Co ltd filed Critical Shanghai Eho Valve Co ltd
Priority to CN202110239423.9A priority Critical patent/CN112797217A/en
Publication of CN112797217A publication Critical patent/CN112797217A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1433—End caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1438—Cylinder to end cap assemblies
    • F15B15/1442—End cap sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F15B15/1452—Piston sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods
    • F15B15/1461—Piston rod sealings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)

Abstract

The invention discloses a plastic driving cylinder of a pneumatic diaphragm valve, which comprises a cylinder body, wherein the cylinder body is sealed by a cylinder cover, a piston is arranged in the cylinder body, a valve rod is fixedly arranged in the center of the piston, one end of the valve rod penetrates through the cylinder body and is connected to a valve core, the other end of the valve rod is connected to an indicating rod, the indicating rod is connected to the cylinder cover in a sliding manner, and a spring is arranged between the piston and the cylinder cover; the cylinder cover is in threaded connection with the cylinder body, and the cylinder cover and the cylinder body are made of plastics. The cylinder cover and the cylinder body made of plastic are used for replacing the cylinder cover and the cylinder body made of common metal, so that the weight of the equipment is effectively reduced; the cylinder cover and the cylinder body are connected by threads, so that the structure is simple, the size of the cylinder and the overall size of the valve are effectively reduced, and the installation space required by the valve is reduced; the volume of the cylinder is reduced, the weight is reduced, and the cost is reduced.

Description

Plastic driving cylinder of pneumatic diaphragm valve
Technical Field
The invention relates to an air cylinder, in particular to a plastic driving air cylinder of a pneumatic diaphragm valve.
Background
The diaphragm valve is the biggest difference from other valves: a non-stuffing box structure is adopted; the membrane makes the corrosive medium in the flow passage and all the driving parts in a completely isolated state, thereby avoiding the defects of 'running, overflowing, dripping, leaking' and the like of the common valve. The diaphragm valve has smooth flow passage and small flow resistance, so that larger flow can be obtained. Because the sealing element is a rubber diaphragm with rich elasticity. Thus also having a better tightness and a minimum closing force. The diaphragm valve consists of a valve body, a valve cover, a valve core, a valve rod, a diaphragm and a driving part. The opening and closing of the pneumatic diaphragm valve are realized by supplying or cutting off air to the air cylinder by an air source. When air is supplied, the valve clack drives the diaphragm to ascend to open the passage; when the air is lost, the valve is closed.
However, the conventional pneumatic diaphragm valve has a disadvantage: because the cylinder body and the cylinder cover of the common pneumatic diaphragm valve are made of metal materials, the valve is heavy as a whole, and the cylinder body and the cylinder cover are connected through bolts, so that the valve is large in size, large in required installation space and not beneficial to field installation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a plastic driving cylinder of a pneumatic diaphragm valve, and the cylinder cover and the cylinder body made of plastic are used for replacing a cylinder cover and a cylinder body made of metal, so that the weight is effectively reduced.
The invention provides a plastic driving cylinder of a pneumatic diaphragm valve, which comprises a cylinder body, wherein the cylinder body is closed through a cylinder cover, a piston is arranged in the cylinder body, a valve rod is fixedly arranged at the center of the piston, one end of the valve rod penetrates through the cylinder body and is connected to a valve core, the other end of the valve rod is connected to an indicating rod, the indicating rod is connected to the cylinder cover in a sliding manner, and a spring is arranged between the piston and the cylinder cover; the cylinder cover is in threaded connection with the cylinder body, and the cylinder cover and the cylinder body are made of plastics.
Further, the side wall of the cylinder head, which is in contact with the cylinder block, is provided with an external thread, the side wall of the cylinder block, which is in contact with the cylinder head, is provided with an internal thread matched with the external thread, and the cylinder block and the cylinder head are in sealing connection with the external thread through the matched internal thread.
Furthermore, the outer side surface of the indicating rod is provided with a limiting protrusion, and the limiting protrusion limits the moving distance of the valve rod.
Further, a first sealing groove is formed in the circumferential direction of the side wall, in contact with the cylinder block, of the piston, and a first sealing ring is arranged in the first sealing groove.
Further, a second sealing groove is formed in the circumferential direction of the side wall, in contact with the valve rod, of the cylinder body, and a second sealing ring is arranged in the second sealing groove.
Further, the piston is provided with a third seal groove in the lateral wall of being connected with the valve rod, be provided with the third sealing washer in the third seal groove.
Further, the cylinder head is provided with a fourth sealing groove on the side wall connected with the indicating rod, and a fourth sealing ring is arranged in the fourth sealing groove.
Furthermore, the piston is made of plastic, and the first sealing ring is made of rubber.
Compared with the prior art, the invention has the following beneficial effects: according to the plastic driving cylinder of the pneumatic diaphragm valve, the cylinder cover and the cylinder body made of plastic materials are used for replacing the cylinder cover and the cylinder body made of common metal materials, so that the weight of equipment is effectively reduced; the cylinder cover and the cylinder body are connected by threads, so that the structure is simple, the size of the cylinder and the overall size of the valve are effectively reduced, and the installation space required by the valve is reduced; the volume of the cylinder is reduced, the weight is reduced, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a plastic driving cylinder of a pneumatic diaphragm valve in an embodiment of the invention.
In the figure:
1. a cylinder block; 2. a second seal ring; 3. a valve stem; 4. a piston; 5. a first seal ring; 6. a third seal ring; 7. a spring; 8. a cylinder head; 9. an indication lever; 10. and a fourth seal ring.
Detailed Description
The invention is further described below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of a plastic driving cylinder of a pneumatic diaphragm valve in an embodiment of the invention.
Referring to fig. 1, the plastic driving cylinder of the pneumatic diaphragm valve according to the embodiment of the present invention includes a cylinder block 1, the cylinder block 1 is closed by a cylinder head 8, a piston 4 is disposed in the cylinder block 1, a valve rod 3 is fixedly disposed at the center of the piston 4, one end of the valve rod 3 penetrates through the cylinder block 1 and is connected to a valve core, the other end of the valve rod 3 is connected to an indication rod 9, the indication rod 9 is slidably connected to the cylinder head 8, and a spring 7 is disposed between the piston 4 and the cylinder head 8; the cylinder head 8 is in threaded connection with the cylinder block 1, and the cylinder head 8 and the cylinder block 1 are made of plastics. The materials of the cylinder body 1 and the cylinder cover 8 are replaced by plastic materials from common metal materials, so that the weight is greatly reduced; and the cylinder body 1 and the cylinder cover 8 are in threaded connection, so that bolt connection is avoided, and the volume of the cylinder is effectively reduced.
Specifically, the side wall of the cylinder head 8 contacting the cylinder block 1 is provided with an external thread, the side wall of the cylinder block 1 contacting the cylinder head 8 is provided with an internal thread matching the external thread, and the cylinder block 1 and the cylinder head 8 are connected with the external thread in a sealing manner through the matching internal thread.
Specifically, the outer side surface of the indication rod 9 is provided with a limit protrusion which limits the movement distance of the valve rod 3, and further limits the movement displacement of the diaphragm of the pneumatic diaphragm valve.
Specifically, a first sealing groove is formed in the circumferential direction of the side wall of the piston 4, which is in contact with the cylinder block 1, and a first sealing ring 5 is arranged in the first sealing groove; a second sealing groove is formed in the circumferential direction of the side wall, in contact with the valve rod 3, of the cylinder body 1, and a second sealing ring 2 is arranged in the second sealing groove; a third sealing groove is formed in the side wall, connected with the valve rod 3, of the piston 4, and a third sealing ring 6 is arranged in the third sealing groove; the cylinder head 8 is provided with a fourth seal groove in a side wall connected to the indicator stem 9, and a fourth seal ring 10 is provided in the fourth seal groove. The sealing effect is ensured by the arrangement of the sealing ring 2, and the cleanness of the cavity where the spring 7 is arranged is ensured.
Preferably, the piston 4 is made of plastic, and the first sealing ring 5 is made of rubber.
In summary, the plastic driving cylinder of the pneumatic diaphragm valve in the embodiment of the present invention uses the cylinder head 8 and the cylinder block 1 made of plastic to replace the cylinder head and the cylinder block made of common metal materials, thereby effectively reducing the weight of the device; the cylinder cover 8 and the cylinder body 1 are connected by threads, the structure is simple, the size of the cylinder and the overall size of the valve are effectively reduced, and the installation space required by the valve is reduced; the volume of the cylinder is reduced, the weight is reduced, and the cost is reduced.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A plastic driving cylinder of a pneumatic diaphragm valve is characterized by comprising a cylinder body, wherein the cylinder body is closed through a cylinder cover, a piston is arranged in the cylinder body, a valve rod is fixedly arranged in the center of the piston, one end of the valve rod penetrates through the cylinder body to be connected to a valve core, the other end of the valve rod is connected to an indicating rod, the indicating rod is connected to the cylinder cover in a sliding mode, and a spring is arranged between the piston and the cylinder cover; the cylinder cover is in threaded connection with the cylinder body, and the cylinder cover and the cylinder body are made of plastics.
2. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein the side wall of the cylinder head in contact with the cylinder block is provided with an external thread, the side wall of the cylinder block in contact with the cylinder head is provided with an internal thread matching the external thread, and the cylinder block and the cylinder head are sealingly connected with the external thread through the matching internal thread.
3. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein an outer side surface of said indicator stem is provided with a limit projection, said limit projection defining a travel distance of the valve stem.
4. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein a first sealing groove is circumferentially provided in a sidewall of the piston contacting the cylinder block, and a first sealing ring is provided in the first sealing groove.
5. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein a second sealing groove is circumferentially provided in a sidewall of the cylinder block in contact with the valve stem, and a second sealing ring is provided in the second sealing groove.
6. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein said piston has a third seal groove in a sidewall connecting to said valve stem, said third seal groove having a third seal ring disposed therein.
7. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein said cylinder head is provided with a fourth seal groove in a sidewall connected to the guide rod, said fourth seal groove having a fourth seal ring disposed therein.
8. The plastic drive cylinder for a pneumatic diaphragm valve of claim 1, wherein said piston is made of plastic and said first seal ring is made of rubber.
CN202110239423.9A 2021-03-04 2021-03-04 Plastic driving cylinder of pneumatic diaphragm valve Pending CN112797217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110239423.9A CN112797217A (en) 2021-03-04 2021-03-04 Plastic driving cylinder of pneumatic diaphragm valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110239423.9A CN112797217A (en) 2021-03-04 2021-03-04 Plastic driving cylinder of pneumatic diaphragm valve

Publications (1)

Publication Number Publication Date
CN112797217A true CN112797217A (en) 2021-05-14

Family

ID=75816457

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110239423.9A Pending CN112797217A (en) 2021-03-04 2021-03-04 Plastic driving cylinder of pneumatic diaphragm valve

Country Status (1)

Country Link
CN (1) CN112797217A (en)

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