CN213017852U

CN213017852U - Diaphragm valve capable of being opened pneumatically or manually

Info

Publication number: CN213017852U
Application number: CN202021513291.1U
Authority: CN
Inventors: 高健
Original assignee: Jiangsu Chnv Instrument Control Engineering Co ltd
Current assignee: Jiangsu Chnv Instrument Control Engineering Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-04-20
Anticipated expiration: 2030-07-27

Abstract

The utility model discloses a diaphragm valve that can pneumatics or manually open, including the valve body, a valve pocket has in the valve body, an inlet channel and exit channel have been seted up respectively to the both sides of valve body, inlet channel and exit channel communicate the valve pocket in the valve body jointly, the valve pocket is embedded to have the valve seat, the top of valve seat is provided with the diaphragm with valve seat matched with, the top of diaphragm supports and has leaned on fore-set and diaphragm clamping ring, the fore-set is located directly over the valve seat, and this fore-set slides upwards vertically and passes the diaphragm clamping ring, and the air that lets in acts on the bottom of piston, and the clearance between the bottom of piston and the piston chamber is less, and gas filling is fast, and pressure increase is rapid, and can make the piston rise with the liquid pressure combined action in the valve body, opens the valve body; when air is decompressed, the piston can return quickly under the action of the spring to recover the initial state, so that the overall action sensitivity is relatively high.

Description

Diaphragm valve capable of being opened pneumatically or manually

Technical Field

The utility model relates to a diaphragm valve field, concretely relates to diaphragm valve that can pneumatics or manually open.

Background

The diaphragm valve is a stop valve which uses a diaphragm as an opening and closing piece to close a flow passage, cut off fluid and separate an inner cavity of a valve body from an inner cavity of a valve cover. The diaphragm is made of elastic, corrosion-resistant and impermeable materials such as rubber and plastics.

Patent application No. CN94247844.4 discloses a both manually, but manual, pneumatic diaphragm valve of pneumatic operation again, this diaphragm valve comprises components such as valve body, valve gap, case, through adopting the interior diaphragm that is provided with of valve gap, and set up technical measure such as compressed air entry on the valve gap, the shortcoming such as the easy emergence seepage of current valve has been solved, its sealing performance is good, have and can accomplish two control and through the degree of opening of manual preset valve through pneumatics, or only with the degree of opening of manual regulation valve as required.

When the diaphragm valve is pneumatically closed in the actual use process, due to the structural design, the space of the air chamber is relatively large, the whole air chamber needs to be filled with air, and the diaphragm can be tightly pressed and attached to the valve seat in the valve body to close the diaphragm valve when the air in the air chamber generates enough pressure, so that the air introduced into the diaphragm valve is relatively long in time, and the action sensitivity is low;

besides the high requirement on gas pressure when the diaphragm valve is closed, a corresponding locking mechanism is lacked between the valve rod and the valve body of the diaphragm valve, and the valve rod can shake in the working process.

Therefore, how to solve the defects of the prior art is a subject of the present invention.

Disclosure of Invention

In order to solve the problem, the utility model discloses a diaphragm valve that can open pneumatically or manually.

In order to achieve the above purpose, the utility model provides a following technical scheme: the diaphragm valve capable of being opened pneumatically or manually comprises a valve body, wherein a valve cavity is arranged in the valve body, an inlet passage and an outlet passage are respectively arranged on two sides of the valve body, the inlet passage and the outlet passage are jointly communicated with the valve cavity in the valve body, a valve seat is embedded in the valve cavity, a diaphragm matched with the valve seat is arranged at the top of the valve seat, the top of the diaphragm is abutted against a top post and a diaphragm pressing ring, the top post is positioned right above the valve seat and vertically and upwards slides to penetrate through the diaphragm pressing ring, the diaphragm valve further comprises a piston seat and a valve rod, the piston seat is vertically fixed on the valve body, a piston cavity is arranged in the piston seat along the direction vertical to the diaphragm, a piston is slidably mounted in the piston cavity, a gland is fixed at the bottom of the piston seat and downwards extends into the valve cavity and abuts against the diaphragm pressing ring, a through hole is formed in the gland corresponding to the top pillar, the top end of the top pillar extends into the through hole in a sliding mode, the through hole penetrates through the piston cavity upwards, a sliding pillar is fixed at the bottom of the piston and extends into the through hole in a sliding mode downwards and abuts against the top of the top pillar, and the outer wall of the sliding pillar is in sealing fit with the inner wall of the through hole;

a spring is arranged between the top of the piston and the top wall of the piston cavity, and the bottom end of the spring acts on the piston;

the valve rod is vertically arranged, the valve rod is inserted into the piston seat in a sliding mode and is in sealing fit with the piston seat, the bottom end of the valve rod extends into the piston cavity, the top of the piston is provided with an insertion hole corresponding to the valve rod, the bottom end of the valve rod is fixedly inserted into the insertion hole, a first gap is reserved between the bottom end of the valve rod and the bottom surface of the insertion hole, and the outer wall of the bottom end of the valve rod is in sealing fit with the inner wall of the insertion hole;

an air inlet channel is horizontally formed in the side portion of the piston seat, a first air channel is formed in the valve rod in the vertical direction, the top end of the first air channel is communicated with the air inlet channel, the bottom end of the first air channel is communicated with the first gap, a second gap is reserved between the bottom surface of the piston and the bottom surface of the inner cavity of the piston cavity, a second air channel is formed in the piston, and the second gap is communicated with the first gap through the second air channel;

the top of valve rod rotates and is connected with a screw rod, the top of screw rod runs through the piston seat and stretches out to the outside of piston seat, the top cover of screw rod is equipped with a fixation nut and lock nut, fixation nut's bottom surface is fixed in the top of piston seat, lock nut locking supports and leans on fixation nut's top.

As an improvement of the utility model, a rotating handle is fixedly connected with the top of screw rod, the rotating handle level sets up.

As an improvement of the utility model, the two sides of the valve body correspond the inlet channel and the outlet channel are respectively connected with a cutting sleeve type pipe joint which is communicated with the inlet channel and the outlet channel.

As an improvement of the utility model, the piston seat comprises an upper shell and a lower shell, the upper shell is in sealing fit with the lower shell, and the upper shell and the lower shell are connected together through a bolt detachable.

Compared with the prior art, the utility model has the advantages of as follows: the diaphragm valve of the utility model comprises a piston seat, a piston is arranged in the piston cavity in a sliding way, a spring is arranged between the top of the piston and the top wall of the piston cavity, and the spring acts on the piston to press a sliding column at the bottom of the piston against a diaphragm so as to seal the valve body; when the diaphragm valve is opened by ventilation, the introduced air acts on the bottom of the piston, the gap between the bottom of the piston and the piston cavity is small, the air is filled quickly, the pressure is increased quickly, and the air and the liquid pressure in the valve body can act together to lift the piston to open the valve body; when air is decompressed, the piston can return quickly under the action of the spring to recover the initial state, so that the overall action sensitivity is relatively high; the top of valve rod is rotated and is connected with the screw rod, connects fixedly through a fixation nut and a lock nut between screw rod and the piston seat, can prevent that it from producing not hard up in the use, and the fastness is better.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of the piston.

List of reference numerals: 100 valve body, 101 valve cavity, 102 valve seat, 103 diaphragm, 104 top column, 105 press ring, 106 ferrule type pipe joint, 200 piston seat, 201 piston cavity, 202 piston, 203 gland, 204 sliding column, 205 spring, 206 jack, 207 first gap, 208 air inlet channel, 209 second gap, 210 second air channel, 300 valve rod, 301 first air channel, 400 screw rod, 401 fixed nut, 402 lock nut and 403 rotating handle.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example (b): referring to fig. 1-2, a diaphragm valve capable of being pneumatically or manually opened includes a valve body 100, a valve cavity 101 is provided in the valve body 100, an inlet passage and an outlet passage are respectively provided at two sides of the valve body 100, the inlet passage and the outlet passage are commonly communicated with the valve cavity 101 in the valve body 100, a valve seat 102 is embedded in the valve cavity 101, a diaphragm 103 matched with the valve seat 102 is provided at the top of the valve seat 102, a top post 104 and a diaphragm press ring 105 are abutted against the top of the diaphragm 103, the top post 104 is located right above the valve seat 102, and the top post 104 vertically slides upwards to pass through the diaphragm press ring 105; the above is the existing structure of the diaphragm valve;

the diaphragm valve further comprises a piston seat 200 and a valve rod 300, the piston seat 200 is vertically fixed on the valve body 100, a piston cavity 201 is formed in the piston seat 200 along the direction perpendicular to the diaphragm 103, a piston 202 is slidably mounted in the piston cavity 201, a gland 203 is integrally formed at the bottom of the piston seat 200, the gland 203 downwardly extends into the valve cavity 101 and abuts against the diaphragm pressing ring 105, a through hole is formed in the gland 203 corresponding to the top pillar 104, the top end of the top pillar 104 slidably extends into the through hole, the through hole upwardly penetrates through the piston cavity 201, a sliding pillar 204 is integrally formed at the bottom of the piston 202, the sliding pillar 204 downwardly slidably extends into the through hole and abuts against the top of the top pillar 104, and the outer wall of the sliding pillar 204 is in sealing fit with the inner wall of the through hole through an O-ring;

a spring 205 is arranged between the top of the piston 202 and the top wall of the piston cavity 201, and the bottom end of the spring 205 acts on the piston 202; the spring 205 is a compression spring, the sliding column 204 at the bottom of the piston 202 acts on the top column 104 through the spring 205, and the diaphragm 103 is pressed and attached to the valve seat 102 through the top column 104;

the valve rod 300 is vertically arranged, the valve rod 300 is inserted into the piston seat 200 in a sliding manner and is in sealing fit with the piston seat 200, specifically, an accommodating cavity is formed in the piston seat 200 along the vertical direction, the valve rod 300 is arranged in the accommodating cavity, a plurality of O-shaped rings are sleeved on the outer wall of the valve rod 300 and are in sealing fit with the inner wall of the accommodating cavity of the piston seat 200 through the O-shaped rings, the bottom end of the valve rod 300 extends into the piston cavity 201, the top of the piston 202 is provided with an insertion hole 206 corresponding to the valve rod 300, the bottom end of the valve rod 300 is fixedly inserted into the insertion hole 206 through a hole check ring, a first gap 207 is reserved between the bottom surface of the valve rod 300 and the hole bottom surface of the insertion hole 206, and the outer wall of the;

an air inlet channel 208 is horizontally formed in the side portion of the piston seat 200, a first air channel 301 is formed in the valve rod 300 along the vertical direction, the top end of the first air channel 301 is communicated with the air inlet channel 208, the bottom end of the first air channel 301 is communicated with the first gap 207, a second gap 209 is reserved between the bottom surface of the piston 202 and the bottom surface of the inner cavity of the piston cavity 201, a second air channel 210 is formed in the piston 202, and the second gap 209 is communicated with the first gap 207 through the second air channel 210;

the top end of the valve rod 300 is rotatably connected with a screw 400 through a bearing, the top of the screw 400 penetrates through the piston seat 200 and extends out of the piston seat 200, the top end of the screw 400 is sleeved with a fixing nut 401 and a locking nut 402, the bottom surface of the fixing nut 401 is welded and fixed on the top of the piston seat 200, and the locking nut 402 is locked and abutted against the top of the fixing nut 401;

the utility model discloses a diaphragm valve is normal close formula valve, and when pneumatic opening, with inlet channel 208 intercommunication outside air supply pipe (install the relief valve on the air supply pipe and can use when exhausting), gas loops through this moment: the air inlet channel 208, the first air channel 301, the first gap 207 and the second air channel 210 enter a second gap 209 between the bottom surface of the piston 202 and the bottom surface of the inner cavity of the piston cavity 201, the gap between the bottom of the piston 202 and the piston cavity 201 is small, air is filled quickly, pressure is increased quickly, the piston 202 is pushed to move upwards, the top of the diaphragm 103 loses acting force, the diaphragm 103 is recovered to be separated from the valve seat 102, at the moment, the inlet channel and the outlet channel of the valve body 100 are communicated, and the valve body 100 is in an open state; besides the acting force of the introduced gas, the inlet channel of the valve body 100 can be connected with an external liquid pipeline in the use process of the diaphragm valve, and the liquid introduced into the inlet channel of the valve body 100 has an upward acting force on the diaphragm 103;

when the diaphragm valve is manually opened, after the locking nut 402 is rotated upwards and loosened, the screw rod 400 is rotated upwards, the bottom end of the screw rod 400 drives the valve rod 300 to ascend, the piston 202 is driven to move upwards through the valve rod 300, so that the acting force of the top of the diaphragm 103 is lost, the diaphragm 103 is separated from the valve seat 102 in a restored state, and at the moment, the inlet channel and the outlet channel of the valve body 100 are communicated; on the contrary, when the diaphragm valve is closed, the screw rod 400 is rotated downwards, the valve rod 300 presses and attaches the diaphragm 103 to the valve seat 102 again to seal the valve body 100, then the locking nut 402 is screwed and abuts against the fixing nut 401, and the fixing nut 401 and the locking nut 402 form a double-nut locking mechanism (after the two nuts are screwed, the axial force generated between the nuts increases the friction force between the nut teeth and the bolt teeth to prevent the nuts from loosening automatically), so that the screw rod 400 is prevented from loosening;

the top of the screw 400 is fixedly connected with a rotating handle 403, the rotating handle 403 is horizontally arranged, and the handle 403 can facilitate manual rotation of the screw 400.

The inlet channel and the outlet channel on both sides of the valve body 100 are respectively connected with a ferrule type pipe joint 106 communicated with the inlet channel and the outlet channel, and the ferrule type pipe joint 106 is used for being connected with an external infusion pipeline.

Piston seat 200 includes casing and lower casing, goes up the sealed cooperation of rubber seal between casing and the lower casing to link together through bolt detachable, go up and connect through bolt detachable between casing and the lower casing, can be convenient separate the two and overhaul it.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a diaphragm valve that can pneumatics or manual open, includes valve body (100), a valve pocket (101) has in valve body (100), an inlet channel and exit channel have been seted up respectively to the both sides of valve body (100), inlet channel and exit channel communicate valve pocket (101) in valve body (100) jointly, valve pocket (101) are embedded to have a disk seat (102), the top of disk seat (102) is provided with and disk seat (102) matched with diaphragm (103), the top of diaphragm (103) is supported and is leaned on fore-set (104) and diaphragm clamping ring (105), fore-set (104) are located directly over disk seat (102), and this fore-set (104) are vertical upwards to slide and pass diaphragm clamping ring (105), its characterized in that: the diaphragm valve further comprises a piston seat (200) and a valve rod (300), the piston seat (200) is vertically fixed on the valve body (100), a piston cavity (201) is formed in the piston seat (200) in the direction perpendicular to the diaphragm (103), a piston (202) is installed in the piston cavity (201) in a sliding mode, a gland (203) is fixed at the bottom of the piston seat (200), the gland (203) extends downwards into the valve cavity (101) and abuts against the diaphragm pressing ring (105), a through hole is formed in the gland (203) corresponding to the top pillar (104), the top end of the top pillar (104) slides and extends into the through hole, the through hole penetrates through the piston cavity (201) upwards, a sliding pillar (204) is fixed at the bottom of the piston (202), and the sliding pillar (204) slides downwards and extends into the through hole and abuts against the top of the top pillar (104), the outer wall of the sliding column (204) is in sealing fit with the inner wall of the through hole;

a spring (205) is arranged between the top of the piston (202) and the top wall of the piston cavity (201), and the bottom end of the spring (205) acts on the piston (202);

the valve rod (300) is vertically arranged, the valve rod (300) is inserted into the piston seat (200) in a sliding mode and is in sealing fit with the piston seat (200), the bottom end of the valve rod (300) extends into the piston cavity (201), the top of the piston (202) is provided with an insertion hole (206) corresponding to the valve rod (300), the bottom end of the valve rod (300) is fixedly inserted into the insertion hole (206), a first gap (207) is reserved between the bottom end of the valve rod (300) and the bottom surface of the insertion hole (206), and the outer wall of the bottom end of the valve rod (300) is in sealing fit with the inner wall of the insertion hole (206);

an air inlet channel (208) is horizontally formed in the side portion of the piston seat (200), a first air channel (301) is formed in the valve rod (300) along the vertical direction, the top end of the first air channel (301) is communicated with the air inlet channel (208), the bottom end of the first air channel (301) is communicated with the first gap (207), a second gap (209) is reserved between the bottom surface of the piston (202) and the bottom surface of the inner cavity of the piston cavity (201), a second air channel (210) is formed in the piston (202), and the second gap (209) is communicated with the first gap (207) through the second air channel (210);

the top of valve rod (300) is rotated and is connected with a screw rod (400), the top of screw rod (400) is run through piston seat (200) and is stretched out to the outside of piston seat (200), the top cover of screw rod (400) is equipped with a fixation nut (401) and lock nut (402), the bottom surface of fixation nut (401) is fixed in the top of piston seat (200), lock nut (402) locking is supported and is leaned on the top of fixation nut (401).

2. A pneumatically or manually openable diaphragm valve according to claim 1, wherein: the top of the screw rod (400) is fixedly connected with a rotating handle (403), and the rotating handle (403) is horizontally arranged.

3. A pneumatically or manually openable diaphragm valve according to claim 1, wherein: and the two sides of the valve body (100) corresponding to the inlet channel and the outlet channel are respectively connected with a ferrule type pipe joint (106) communicated with the inlet channel and the outlet channel.

4. A pneumatically or manually openable diaphragm valve according to claim 1, wherein: the piston seat (200) comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are in sealing fit and detachably connected together through bolts.