CN108730562B - A self-priming damping vacuum diaphragm valve - Google Patents

Abstract

A self-guiding damping vacuum diaphragm valve belongs to the technical field of vacuum diaphragm valves. Including the diaphragm cavity, the upper membrane cavity, and the middle membrane cavity, the top of the upper shell is connected to the atmospheric pressure or vacuum system; the bottom of the middle shell is provided with a vacuum channel, a damping channel and at least one atmospheric channel, and the upper outlet of the damping channel is covered with a damping block. The damping block presses the middle diaphragm against the inner wall of the bottom of the middle casing, and the middle diaphragm and the port of the air passage are covered and matched. The damping block is provided with a damping hole to communicate with the damping passage. A connecting rod is arranged in the middle of the middle casing. The upper diaphragm is fixedly connected, the connecting rod is connected with the through hole in the middle of the damping block, the valve plate is fixedly installed at the bottom of the connecting rod, and the valve plate is covered with the outlet of the vacuum channel, and the other end of the vacuum channel is connected to the check valve. Connect one end to the vacuum end. The above-mentioned self-guiding damping vacuum diaphragm valve has a delay in opening and closing, which ensures thorough and clean pumping, and is stable and reliable in use.

Description

A self-priming damping vacuum diaphragm valve

technical field

The invention belongs to the technical field of vacuum blowdown, in particular to a self-leading damping vacuum diaphragm valve.

Background technique

In the field of vacuum sewage, the flow speed of the medium is fast, and the response speed of the diaphragm greatly affects the sealing performance of the pipeline and the control of flow noise. The diaphragm valve is used in the vacuum field, which is a relatively new application. There is no diaphragm valve specially used in the vacuum field. The valve opens too fast, the noise is loud, and the valve closes too fast to ensure that the pumping is completely clean. There is an urgent need for a diaphragm valve with controllable opening and closing delay functions.

Contents of the invention

In view of the above-mentioned problems existing in the prior art, the object of the present invention is to design and provide a technical solution for a self-guided damping vacuum diaphragm valve, whose opening and closing are time-delayed to ensure thorough and clean pumping; Good performance, good use effect, pumping gas or liquid medium, suitable for vacuuming toilets, sinks and other vacuum fields.

The self-guided damping vacuum diaphragm valve is composed of a valve body and a diaphragm to form a working chamber. One end of the working chamber is a vacuum end and the other end is a suction end. It is characterized in that a middle shell is arranged above the diaphragm to form a diaphragm cavity. The upper shell is arranged above the shell, and the upper diaphragm is arranged between the middle shell and the upper shell to form the upper membrane cavity and the middle membrane cavity. The joint is arranged on the top of the upper shell, and the joint is connected to the atmospheric pressure or vacuum system; the bottom of the middle shell The housing is provided with a vacuum channel, a damping channel and at least one atmospheric channel. The upper end of the damping channel is covered with a damping block. The damping block presses the middle diaphragm against the inner wall of the bottom of the middle shell, and the middle diaphragm and the port of the atmospheric channel cover the block The damping hole is set on the damping block to communicate with the damping channel. The connecting rod is set in the middle of the middle shell. The valve plate is matched with the cover block of the outlet of the vacuum channel, the other end of the vacuum channel is connected to the check valve, and the other end of the check valve is connected to the vacuum end of the working chamber.

The self-guided damping vacuum diaphragm valve is characterized in that a raised portion is arranged at the bottom of the valve body, at least one barrier rib is arranged on the top of the raised portion, the bottom of the diaphragm is spaced or connected with the barrier rib, and the height of the barrier rib is 3.5-5.5mm, width 5.5-7.5mm.

The self-guided damping vacuum diaphragm valve is characterized in that a spring is arranged in the middle of the diaphragm cavity, the top of the spring is fixedly connected with the bottom of the middle housing, and the bottom of the spring is elastically contacted with the diaphragm.

The self-guided damping vacuum diaphragm valve is characterized in that the valve body and the edge connection part of the diaphragm are arranged in a back-shaped sealing connection structure, and are locked and fixedly matched with the edge connection part of the middle casing by screws; the upper casing, The edge connecting portion of the upper diaphragm is arranged in a groove-shaped sealing connection structure, and is locked and fixedly matched with the edge connecting portion of the middle housing through screws.

The self-guided damping vacuum diaphragm valve is characterized in that the vacuum channel, the damping channel, and the atmospheric channel are all L-shaped channels, the check valve is connected to the vacuum channel through a right-angled pipe, and the check valve is connected to the vacuum channel through a drainage tube. Vacuum end mating connection.

The self-guided damping vacuum diaphragm valve is characterized in that 2-4 air passages are arranged on the bottom shell of the middle shell.

The self-guided damping vacuum diaphragm valve is characterized in that the top of the connecting rod is fixedly connected to the upper diaphragm by screws through the upper connecting piece and the lower connecting piece.

The self-guiding damping vacuum diaphragm valve is characterized in that the diameter of the damping hole is 0.2-0.35mm.

The self-guided damping vacuum diaphragm valve is characterized in that a concave membrane cavity is set in the middle of the top of the upper membrane cavity.

The self-guided damping vacuum diaphragm valve is characterized in that a diaphragm protrusion is arranged on the upper diaphragm between the upper diaphragm chamber and the middle diaphragm chamber.

The above-mentioned self-guiding damping vacuum diaphragm valve has a delay in opening and closing, which can be extended by 0.5 seconds to 1.5 seconds to ensure thorough and clean pumping; it has large flux, good sealing performance, and good use effect. It is suitable for pumping gas or liquid media. , suitable for vacuuming toilets, sinks and other vacuum fields, because all of them adopt mechanical structures, the use is stable and reliable.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the valve body of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in the figure, the self-guided damping vacuum diaphragm valve consists of a valve body 1 and a diaphragm 2 to form a working chamber. One end of the working chamber is a vacuum end 6, and the other end is a suction end 27. A middle housing 10 is arranged above the diaphragm 2. Diaphragm cavity 26, an upper casing 14 is arranged above the middle casing 10, an upper diaphragm 19 is arranged between the middle casing 10 and the upper casing 14 to form an upper membrane cavity 18 and a middle membrane cavity 20, and a joint is arranged on the top of the upper casing 14 16. The joint 16 is connected to the atmospheric pressure or vacuum system; the bottom shell of the middle shell 10 is provided with a vacuum channel 9, a damping channel 25 and at least one atmospheric channel 22, and the upper end of the damping channel 9 is covered with a damping block 23, and the damping block 23 The middle diaphragm 21 is pressed against the inner wall of the bottom of the middle casing 10, the middle diaphragm 21 and the port of the air passage 22 are covered and engaged, the damping block 23 is provided with a damping hole 24 to communicate with the damping passage 25, and the middle of the middle casing 10 is provided with a connection The rod 17, the top of the connecting rod 17 is fixedly connected with the upper diaphragm 19, the connecting rod 17 is connected with the through hole in the middle of the damping block 23, and the bottom of the connecting rod 17 is fixed with a valve plate 11, and the valve plate 11 is covered and blocked with the outlet of the vacuum channel 9 Coordinated, the other end of the vacuum channel 9 is connected to the check valve 8, and the other end of the check valve 8 is connected to the vacuum end 6 of the working chamber. Suction end 27 is connected with equipment such as toilet, sink. If the valve plate 11 is broken, due to the setting of the check valve 8, it is prevented that the atmosphere goes to the vacuum passage 9.

Preferably, the bottom of the valve body 1 is provided with a raised portion, and the top of the raised portion is provided with at least one barrier rib 3 , and the bottom of the diaphragm 2 is spaced or engaged with the barrier rib 3 . Diaphragm 2 is made of natural rubber. The height of the barrier rib 3 is 3.5-5.5mm, the width is 5.5-7.5mm, and the pressure deformation range of the diaphragm 2 is 3.5-5.5mm; if it is not on the valve body 1, the service life will be increased; if it is on the valve body 1 , it is also easy to form a local high pressure, the diaphragm 2 is easy to break, and it is easy to fatigue. The barrier ribs 3 and the valve body 1 are integrally cast and formed, and there are 1-3 bars, which increases the service life.

Preferably, a spring 4 is arranged in the middle of the diaphragm cavity 26 , the top of the spring 4 is fixedly connected to the bottom of the middle housing 10 , and the bottom of the spring 4 is elastically contacted with the diaphragm 2 .

Preferably, the valve body 1 and the edge connection of the diaphragm 2 are arranged in a back-shaped sealing connection structure, and are locked and fixedly matched with the edge connection of the middle housing 10; the upper casing 14 and the upper diaphragm 19 are arranged in a The groove-shaped sealing connection structure is fixedly matched with the edge connection part of the middle housing 10 through screw locking.

Preferably, the vacuum channel 9, the damping channel 25, and the atmospheric channel 22 are all L-shaped channels, the check valve 8 is connected to the vacuum channel 9 through the right-angle connecting pipe 5, and the check valve 8 is connected to the vacuum port 6 through the drainage tube 7. .

Preferably, 2-4 air channels 22 are arranged on the bottom shell of the middle shell 10 .

Preferably, the top of the connecting rod 17 is fixedly connected to the upper diaphragm 19 by screws through the upper connecting piece 13 and the lower connecting piece 12 .

Preferably, the diameter of the damping hole 24 is 0.2-0.35mm.

Preferably, the concave film cavity 15 is arranged in the middle of the top of the upper film cavity 18 .

Preferably, a membrane protrusion 19 a is provided on the upper membrane 19 between the upper membrane cavity 18 and the middle membrane cavity 20 .

In this paper, specific examples are used to illustrate the principles and implementation modes of the present invention, and the descriptions of the above embodiments are only used to help understand the core idea of the present invention. It should be pointed out that those skilled in the art to which the present invention belongs can make various modifications, supplements, and substitutes in similar ways to the described specific embodiments, but they will not deviate from the gist of the present invention or go beyond the definition of the claims range.

The working principle is as follows: when the joint 16 is connected to the atmospheric pressure, the atmospheric pressure on the valve plate 11 presses the valve plate 11, and the vacuum will not go to the diaphragm chamber 26; when the joint 16 is connected to the vacuum system, the upper membrane chamber 18 becomes a vacuum chamber, and the middle membrane The cavity is 20 atmospheres, and a pressure difference is generated. The upper diaphragm 19 is pressed by the middle housing 10 and the upper housing 14, and the upper diaphragm 19 pushes upwards, driving the connecting rod 17 and the valve plate 11 to move upward as a whole, and the valve plate 11 is opened. The channel 9 and the damping channel 25 are connected. The connection between the connection 16 and the atmospheric pressure and the vacuum system is switched by a three-way valve. When the joint 16 is connected to the vacuum system and switched to atmospheric pressure, the diaphragm cavity 26 is still a vacuum, because the atmospheric pressure balances the pressure inside through the damping hole 24 and the damping channel 25, and the damping hole 24 has a small aperture and has a delay function, so that the diaphragm cavity 26 can reach atmospheric pressure , generally extended by 0.5 seconds -1.5 seconds. Advantages of time delay: opening and closing at the same time, the impact load is large; the time delay is flexible, the opening time is long, and the pumping is completely clean. The required delay time is achieved through the size and number of the apertures of the damping holes 24 and the size of the diaphragm cavity 26 .

Claims (10)

1. it is a kind of from damping vacuum diaphragm valve is drawn, operating room is made of valve body (1) and diaphragm (2), operating room one end is vacuum It holds (6), the other end is suction side (27), it is characterised in that shell (10) constitutes diaphragm cavity (26) in setting above diaphragm (2), Upper housing (14) are set above middle shell (10), upper diaphragm (19) composition is equipped between middle shell (10), upper housing (14) Connector (16) are arranged in upper membrane cavity (18), middle membrane cavity (20), upper housing (14) top, and connector (16) and atmospheric pressure or vacuum system connect It connects；Vacuum passage (9), damp channel (25) and at least one plasmas channel (22), resistance are set on middle shell (10) bottom shell (25) upper end outlet covering gear in Buddhist nun channel connects setting damping block (23), and middle diaphragm (21) is pressed on middle shell by damping block (23) (10) bottom interior wall, middle diaphragm (21) and plasmas channel (22) port covering gear connect cooperation, and damping hole is arranged on (23) in damping block (24) it is connected to damp channel (25), connecting rod (17) is set among middle shell (10), it is solid with upper diaphragm (19) at the top of connecting rod (17) Fixed connection, connecting rod (17) and damping block (23) middle through-hole are worn and connect cooperation, and valve block (11) are fixedly installed in connecting rod (17) bottom, valve block (11) cooperation is connect with vacuum passage (9) outlet covering gear, vacuum passage (9) other end connects check-valves (8), and check-valves (8) is another The vacuum end (6) of one end connection operating room.

2. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that valve body (1) bottom setting protrusion At least one barrier rib (3) are arranged in portion, lug boss top, and diaphragm (2) bottom and barrier rib (3) are spaced or keep off and connect cooperation, resistance The height of muscle (3) is 3.5-5.5mm, width 5.5-7.5mm.

3. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that bullet is arranged among diaphragm cavity (26) Spring (4), spring (4) top are fixedly connected with middle shell (10) bottom, and spring (4) bottom and diaphragm (2) elasticity contact cooperation.

4. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that valve body (1), diaphragm (2) edge Interconnecting piece is arranged to rectangular-ambulatory-plane Hermetical connecting structure, and passes through screw locking secure fit with middle shell (10) edge joins； Upper housing (14), upper diaphragm (19) edge joins are arranged to groove seals connection structure, and connect with middle shell (10) edge Socket part passes through screw locking secure fit.

5. as described in claim 1 a kind of from drawing damping vacuum diaphragm valve, it is characterised in that the vacuum passage (9), resistance Buddhist nun channel (25), plasmas channel (22) are L shape channel, and check-valves (8) is connect by right angle adapter tube (5) with vacuum passage (9), Check-valves (8) is cooperatively connected by drainage tube (7) and vacuum end (6).

6. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that on middle shell (10) bottom shell 2-4 plasmas channel (22) is set.

7. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that pass through upper company at the top of connecting rod (17) Fitting (13), lower connector (12) are fixedly connected with upper diaphragm (19) screw.

8. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that the aperture of damping hole (24) is 0.2-0.35mm。

9. one kind as described in claim 1 draws damping vacuum diaphragm valve certainly, it is characterised in that upper membrane cavity (18) top center is set Set recessed membrane cavity (15).

10. one kind as claimed in claim 7 draws damping vacuum diaphragm valve certainly, it is characterised in that upper membrane cavity (18), middle membrane cavity (20) diaphragm lug boss (19a) is set on the upper diaphragm (19) between.