CN114992334B

CN114992334B - Diaphragm type mud valve

Info

Publication number: CN114992334B
Application number: CN202210923652.7A
Authority: CN
Inventors: 斯武君; 尹彤
Original assignee: Ningbo Valve Manufacturing Co ltd
Current assignee: Ningbo Valve Manufacturing Co ltd
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-12-20
Anticipated expiration: 2042-08-02
Also published as: CN114992334A

Abstract

The invention relates to the technical field of mud discharge valves, and discloses a diaphragm type mud discharge valve which comprises a valve body and a valve cover, wherein a flow cavity is formed in the valve body, an inlet is formed in one side of the valve body, an outlet is formed in the bottom of the valve body, a valve diaphragm seat is fixedly connected to the top of the valve body, an elastic diaphragm is arranged between the top of the valve diaphragm seat and the bottom of the valve cover, an upper pressing plate and a lower pressing plate are respectively and fixedly connected to the top and the bottom of the elastic diaphragm, a water pressure cavity is formed between the elastic diaphragm and the valve diaphragm seat, a water inlet pipe is fixedly connected to one side of the valve diaphragm seat, a water outlet valve is further arranged on the valve diaphragm seat, and one end, far away from the valve diaphragm seat, of the water inlet pipe is fixedly connected with a connecting pipe connected with an external water discharge tank.

Description

Diaphragm type mud valve

Technical Field

The invention relates to the technical field of mud valves, in particular to a diaphragm type mud valve.

Background

The sludge discharge valve is also called a cover valve and is commonly used for discharging sludge at the bottom of a sedimentation tank of a municipal water plant and a sewage treatment plant. The suitable medium of the sludge discharge valve is primary sewage, the temperature of the medium is generally less than 50 ℃, and the working water depth is less than 10 meters. The mud valve is also used in water treatment plants for discharging sludge and wastewater in a basin.

Chinese utility model with patent publication No. CN113280137A discloses a diaphragm type mud valve, which comprises a valve body, a valve rod, valve clack and sealing ring, still include a quick detach section of thick bamboo, sealed inclined plane has been seted up to the inboard border department of one end of quick detach section of thick bamboo, the bottom of sealing ring is equipped with the extension that can match with sealed inclined plane outline, sealed ladder groove has been seted up to the tip outside border of quick detach section of thick bamboo, sealed ladder groove and sealed inclined plane have the bearing arch that is used for bearing the sealing ring between, the sealing ring outside has the ladder layer of outside extension, the ladder layer can be in sealed ladder inslot, ladder layer top has sealed notch, the upper portion border of valve body output inner wall has the pressure to compress tightly the arch, the pressure equipment that quick detach section of thick bamboo can be dismantled is in the output, compress tightly protruding border bottom can laminate with bearing arch top face, compress tightly protruding bottom still has the extrusion annular plate that can correspond sealed notch, and can extrude into, the quick replacement of the sealing ring of valve body of the later stage of being convenient for this invention, do benefit to the maintenance.

However, the above patents have the following disadvantages: filths such as silt stop in valve body water outlet department, so when the valve plate contradicts with the delivery port is sealed, the valve plate can take place wearing and tearing under the extrusion of silt, and the leakproofness can receive the influence, and when the valve body was opened, debris such as silt in the water source can adsorb on valve body inner wall and valve plate, and after the valve body was opened, debris such as these silt also can not discharge, arouses the corruption of valve body easily, reduction life.

Disclosure of Invention

The invention aims to provide a diaphragm type mud valve to solve the problems in the background technology.

The invention provides a diaphragm type mud valve which comprises a valve body and a valve cover, wherein a flow cavity is formed in the valve body, an inlet is formed in one side of the valve body, an outlet is formed in the bottom of the valve body, a valve diaphragm seat is fixedly connected to the top of the valve body, an elastic diaphragm is arranged between the top of the valve diaphragm seat and the bottom of the valve cover, the top and the bottom of the elastic diaphragm are respectively and fixedly connected with an upper pressing plate and a lower pressing plate, a hydraulic pressure cavity is formed between the elastic diaphragm and the valve diaphragm seat, a water inlet pipe is fixedly connected to one side of the valve diaphragm seat, a water outlet valve is further arranged on the valve diaphragm seat, one end, far away from the valve diaphragm seat, of the water inlet pipe is fixedly connected with a connecting pipe connected with an external drainage pool, a spring is fixedly connected to the upper pressing plate, the spring is fixedly connected with the inner wall of the valve cover, a valve rod is fixedly connected to the lower pressing plate, the valve rod is inserted into the flow cavity, one end, of the valve rod, which is inserted into the flow cavity, a valve plate, the top surface of the valve plate is arc-shaped, and a cleaning assembly is arranged at the bottom of the valve plate.

Preferably, a filter screen is arranged at the position where the connecting pipe is connected with the drainage pool.

Preferably, export top inner wall is the inclined plane, valve plate bottom avris for the inclined plane and with the inclination on the inclined plane in the export is the same.

Preferably, clean subassembly include the installation cover and with set up the drive gear in the installation cover, the installation cover is fixed the bottom of valve plate, the drive gear top with the installation cover inner wall rotates to be connected, drive gear bottom through elasticity reset assembly with the installation cover links to each other, through connection has two at least rack plates, every in the installation cover the rack plate all with drive gear meshes the connection, the rack plate is kept away from the clean cover of the one end fixedly connected with of installation cover, every the equal fixedly connected with curved atress board in clean cover bottom.

Preferably, the mounting sleeve is made of a colloid material.

Preferably, the elastic reset assembly comprises a coil spring arranged at the bottom of the inner wall of the mounting sleeve, one end of the side of the coil spring is fixedly connected with the mounting sleeve, one end of the coil spring is fixedly connected with a vertical rod, and the vertical rod is fixedly connected with the bottom of the transmission gear.

Preferably, the rack plate is in fixedly connected with connecting rod on the outside outer wall of installation cover, fixedly connected with slider on the connecting rod, two at least spouts have been seted up to the valve plate bottom, the slider with spout slip joint.

Preferably, the water outlet valve is arranged at the bottom of the valve membrane seat, and a high-pressure nozzle is fixedly connected to the water outlet valve and communicated with the flow cavity.

Preferably, the inner diameter of the connection pipe is at least twice as large as the inner diameter of the water inlet pipe.

Preferably, the valve diaphragm seat is connected with the valve cover through a screw in a penetrating manner, and a pressing ring is arranged at the position where the screw penetrates through the elastic diaphragm.

Compared with the prior art, the invention has the beneficial effects that:

(1) When sewage is required to be discharged, water in the drainage pool enters the water pressure cavity through the connecting pipe and the water inlet pipe, the elastic diaphragm deforms upwards under the action of water pressure, so that the valve rod and the valve plate are driven to move upwards through the lower pressing plate, the outlet is opened, the sewage discharge work is carried out at the moment, the water outlet valve is opened after the sewage discharge is finished, the water in the water pressure cavity is discharged, the pressure is recovered at the moment, the reset is realized under the action of the spring, the outlet is closed again by the valve plate, the top surface of the valve plate is arc-shaped, and when the sewage is discharged, sewage is not easily adsorbed on the top surface of the valve plate, so that the residue of the sewage on the valve plate is reduced, the service life of the valve plate is prolonged, and the corrosion of the valve plate caused by the long-term residue of the sewage is avoided.

(2) The inclined surface on the outlet is convenient for the flowing discharge of dirt such as silt and the like, and the dirt such as silt and the like is prevented from staying at the opening at the top of the outlet.

(3) The cleaning sleeve cannot abut against the inner wall of the valve body in the ascending process of the valve plate, and can realize cleaning only in the descending process, so that the residues of dirt such as silt are avoided, the integral sealing performance is improved, and the service life is prolonged.

(4) In the fourth, fifth and sixth processes of the invention, the water outlet valve is required to be opened at this time, the pressure in the water pressure cavity is removed, and in the pressure release process, because the inner diameter of the connecting pipe is far larger than that of the water inlet pipe, the accumulated water source in the connecting pipe is larger, and the main source of the water pressure comes from the amount of water and the height of the water, the height is inconvenient to adjust due to the problem of construction and installation, but the water amount can be increased by increasing the inner diameter, so that the water pressure release can not be completed immediately, at this time, under the action of the water pressure, the water can be sprayed out through the high-pressure nozzle, the water of the nozzle can wash the cambered surface at the top of the valve plate, the cleaning effect is further improved, the residue of dirt is avoided, the sprayed water can enhance the cleaning of the inner wall of the valve body, and the sprayed water finally flows out from the gap between the two cleaning sleeves.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

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

FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;

FIG. 3 is a partial schematic view of the structure of FIG. 2;

FIG. 4 is a schematic view of a bottom perspective structure of a valve plate according to the present invention;

FIG. 5 is a schematic cross-sectional view of the mounting sleeve of the present invention;

FIG. 6 is an enlarged view taken at A in FIG. 3;

FIG. 7 is a schematic view of the valve plate sealing with the outlet prior to rising in the present invention;

FIG. 8 is a schematic view of the valve plate of the present invention raised;

FIG. 9 is a schematic view of the present invention after the valve plate has fully risen;

FIG. 10 is a schematic view of the rack plate being expanded when the valve plate is ready to be lowered in accordance with the present invention;

FIG. 11 is a schematic view of the valve plate descending in the present invention;

FIG. 12 is a schematic view of the valve plate sealing against the outlet after full descent in accordance with the present invention;

fig. 13 is an enlarged view of fig. 2 at B.

In the figure: 1. a valve body; 101. a flow chamber; 102. an inlet; 103. an outlet; 2. a valve cover; 3. a valve diaphragm seat; 4. an elastic diaphragm; 401. an upper pressure plate; 402. pressing the plate downwards; 403. a hydraulic pressure chamber; 404. a water inlet pipe; 405. a water outlet valve; 406. a connecting pipe; 407. a spring; 408. a valve stem; 409. a valve plate; 5. installing a sleeve; 501. a transmission gear; 502. a rack plate; 503. cleaning the sleeve; 504. a stress plate; 6. a coil spring; 601. a vertical rod; 7. a connecting rod; 701. a slider; 702. a chute; 8. a high pressure nozzle; 9. a screw; 901. and (5) pressing a ring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 to 13, an embodiment of the invention provides a diaphragm type mud valve, which includes a valve body 1 and a valve cover 2, a flow chamber 101 is formed inside the valve body 1, an inlet 102 is formed in one side of the valve body 1, an outlet 103 is formed in the bottom of the valve body 1, a valve diaphragm seat 3 is fixedly connected to the top of the valve body 1, an elastic diaphragm 4 is arranged between the top of the valve diaphragm seat 3 and the bottom of the valve cover 2, an upper pressing plate 401 and a lower pressing plate 402 are respectively and fixedly connected to the top and the bottom of the elastic diaphragm 4, a water pressure chamber 403 is formed between the elastic diaphragm 4 and the valve diaphragm seat 3, a water inlet pipe 404 is fixedly connected to one side of the valve diaphragm seat 3, a water outlet valve 405 is further arranged on the valve diaphragm seat 3, a connecting pipe 406 connected to an external drainage tank is fixedly connected to one end of the water inlet pipe 404 far away from the valve diaphragm seat 3, a spring 407 is fixedly connected to the upper pressing plate 401, the spring 407 is fixedly connected to the inner wall of the valve cover 2, a valve rod 408 is fixedly connected to the lower pressing plate 402, the valve rod 408 is inserted into the flow chamber 101, a valve plate 409 is fixedly connected to one end of the valve rod 408 inserted into the flow chamber 101, the valve plate 409 is arc-shaped top surface, and a cleaning assembly is arranged at the bottom of the valve plate.

Specifically, the method comprises the following steps: when sewage drainage is needed, water in a drainage pool enters a water pressure cavity 403 through a connecting pipe 406 and a water inlet pipe 404, under the action of water pressure, the elastic diaphragm 4 deforms upwards, so that the valve rod 408 and the valve plate 409 are driven to move upwards through the lower pressing plate 402, the outlet 103 is opened, at the moment, sewage drainage work is performed, after sewage drainage is completed, the water outlet valve 405 is opened, water in the water pressure cavity 403 is drained, at the moment, pressure is recovered, resetting is realized under the action of the spring 407, the outlet 103 is re-closed by the valve plate 409, wherein the top surface of the valve plate 409 is arc-shaped, when sewage drainage is performed, sewage is not easily adsorbed on the top surface of the valve plate 409, so that the residue of the sewage on the valve plate 409 is reduced, the service life of the valve plate 409 is prolonged, and the corrosion of the valve plate 409 caused by the long-term residue of the sewage is avoided;

and the clean subassembly on the valve plate 409 is used for cleaning the inner wall of valve body 1, avoids remaining of filth, improves the life of valve body 1.

The position department that connecting pipe 406 links to each other with the drainage pond is provided with the filter screen, and in this setting, the one end that links to each other with the drainage pond through connecting pipe 406 is intake and is located to set up the filter screen and can effectually block the filth and enter into water pressure chamber 403, avoids filths such as silt to cause wearing and tearing to elastic diaphragm 4.

Export 103 top inner wall is the inclined plane, and valve plate 409 bottom avris is the inclined plane and the same with the inclination of the inclined plane on the export 103, and the setting of inclined plane is convenient for the mobile of filths such as silt to discharge on export 103 in this setting, avoids filths such as silt to stop at export 103 top opening part, because if filths such as silt stop at the opening part of export 103, so when valve plate 409 and export 103 are sealed contradicted, valve plate 409 can take place wearing and tearing under the extrusion of silt, and the leakproofness can receive the influence.

The cleaning assembly comprises an installation sleeve 5 and a transmission gear 501 arranged in the installation sleeve 5, the installation sleeve 5 is fixed at the bottom of the valve plate 409, the top of the transmission gear 501 is rotatably connected with the inner wall of the installation sleeve 5, the bottom of the transmission gear 501 is connected with the installation sleeve 5 through an elastic resetting assembly, at least two rack plates 502 are connected in the installation sleeve 5 in a penetrating manner, each rack plate 502 is meshed with the transmission gear 501 and is connected with one end of the rack plate 502, which is far away from the installation sleeve 5, of the cleaning sleeve 503, and the bottom of each cleaning sleeve 503 is fixedly connected with an arc stress plate 504.

The mounting sleeve 5 is made of colloid material.

The elastic reset assembly comprises a coil spring 6 arranged at the bottom of the inner wall of the mounting sleeve 5, one end of the side of the coil spring 6 is fixedly connected with the mounting sleeve 5, one end of the middle of the coil spring 6 is fixedly connected with a vertical rod 601, and the vertical rod 601 is fixedly connected with the bottom of the transmission gear 501.

Specifically, the method comprises the following steps: the cleaning process of the cleaning assembly is divided into the following cases:

referring first to fig. 7, at this time, the valve plate 409 is in sealing contact with the outlet 103, and the flow chamber 101 is filled with liquid;

secondly, referring to fig. 8, at this time, the outlet 103 is opened, the valve plate 409 moves upwards, the liquid flowing in the flow chamber 101 extrudes the stress plate 504, and the stress plate 504 generates a transverse thrust after being stressed, so that the rack plate 502 is driven to move transversely, the transmission gear 501 rotates, and the other rack plate 502 is driven to move transversely, so that the two rack plates 502 are gathered in opposite directions, and the cleaning sleeve 503 does not collide with the outlet 103 and the inner wall of the valve body 1 all the time in the upward moving process of the valve plate 409, so that the silt and other dirt in the liquid can be discharged normally;

referring to fig. 9, the valve plate 409 moves to the top of the flow chamber 101, and the valve plate 409 does not move downward until the liquid is completely discharged, so as to perform a cleaning operation;

referring to fig. 10, when the liquid is completely discharged, the valve plate 409 is ready to move downwards, and after the liquid is completely discharged, the pushing force on the force bearing plate 504 cannot be generated any more, so that under the action of the coil spring 6, the transmission gear 501 rotates and resets, and is unfolded outwards through the rack plate 502, so that the cleaning sleeve 503 is abutted against the inner wall of the valve body 1;

referring to fig. 11, at this time, the valve plate 409 moves downwards, so that in the process of moving downwards, dirt such as silt and the like remained on the inner wall of the valve body 1 can be cleaned through the cleaning sleeve 503 and finally pushed into the outlet 103 to be discharged, and the smoothness of the inner wall of the valve body 1 and the opening at the top of the outlet 103 is guaranteed;

referring to fig. 12, at this time, the valve plate 409 abuts against the outlet 103, and the smoothness of the outlet 103 is increased in the fifth process, so that the sealing performance of the valve plate 409 and the outlet 103 is improved, the valve plate 409 can be prevented from being abraded by solid impurities of silt, and the abutting effect of the cleaning sleeve 503 and the inner peripheral wall of the outlet 103 can further improve the sealing performance;

above-mentioned in-process, can understand that valve plate 409 rises that clean cover 503 of in-process is unable conflict valve body 1 inner wall, only can realize clean work at the clean cover 503 of in-process that moves down to avoid the residue of filths such as silt, improve holistic leakproofness and life.

Rack plate 502 is in fixedly connected with connecting rod 7 on the outside outer wall of installation cover 5, fixedly connected with slider 701 on connecting rod 7, and two at least spout 702 have been seted up to valve plate 409 bottom, and slider 701 and spout 702 slip joint pass through connecting rod 7 and slider 701 in this setting, support rack plate 502, improve the stability that rack plate 502 removed.

The outlet valve 405 is arranged at the bottom of the valve diaphragm seat 3, and the outlet valve 405 is fixedly connected with a high-pressure nozzle 8, and the high-pressure nozzle 8 is communicated with the flow cavity 101.

The inner diameter of the connecting pipe 406 is at least twice the inner diameter of the inlet pipe 404.

Specifically, the method comprises the following steps: in the fourth, fifth and sixth processes, the outlet valve 405 needs to be opened at this time to remove the pressure in the hydraulic pressure chamber 403, and in the pressure releasing process, because the inner diameter of the connecting pipe 406 is much larger than the inner diameter of the inlet pipe 404, the water source accumulated in the connecting pipe 406 is larger, and the main source of the hydraulic pressure comes from the amount of water and the height of the water, which is not convenient to adjust due to the problem of construction and installation, but the water amount can be increased by increasing the inner diameter, so that the hydraulic pressure releasing cannot be completed immediately, at this time, under the action of the hydraulic pressure, the water can be ejected through the high-pressure nozzle 8, the water of the nozzle flushes the arc surface at the top of the valve plate 409, the cleaning effect is further improved, the residue of dirt is avoided, the ejected water can enhance the cleaning of the inner wall of the valve body 1, and the ejected water finally flows out from the gap between the two cleaning sleeves 503.

Valve diaphragm seat 3 passes through screw 9 through connection with valve gap 2, and the position that screw 9 runs through elastic diaphragm 4 is provided with clamping ring 901, improves the stability and the leakproofness that elastic diaphragm 4 connects through clamping ring 901.

The working principle is as follows: when needing blowdown, the water in the drainage pond enters into water pressure chamber 403 through connecting pipe 406 and inlet tube 404, under hydraulic effect, elastic diaphragm 4 upwards takes place deformation, thereby drive valve rod 408 and valve plate 409 rebound through holding down plate 402, thereby open export 103, carry out blowdown work this moment, after the blowdown is accomplished, open outlet valve 405, the water in the water pressure chamber 403 discharges, pressure recovery this moment, thereby realize restoring to the throne under the effect of spring 407, thereby valve plate 409 is with export 103 reclosing, wherein the top face of valve plate 409 is the arc, when the blowdown, the filth is difficult to adsorb on the top face of valve plate 409, thereby reduce the residue of filth on valve plate 409, improve the life of valve plate 409, avoid long-term residue of filth to cause the corruption to valve plate 409, and the cleaning assembly on the valve plate 409 is used for cleaning the valve body 1 inner wall, avoid the residue of filth, improve the life of valve body 1.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a diaphragm formula mud valve, includes valve body (1) and valve gap (2), its characterized in that: the valve comprises a valve body (1), a flow cavity (101) is formed in the valve body (1), an inlet (102) is formed in one side of the valve body (1), an outlet (103) is formed in the bottom of the valve body (1), a valve membrane seat (3) is fixedly connected to the top of the valve body (1), an elastic membrane (4) is arranged between the top of the valve membrane seat (3) and the bottom of the valve cover (2), an upper pressure plate (401) and a lower pressure plate (402) are fixedly connected to the top and the bottom of the elastic membrane (4) respectively, a water pressure cavity (403) is formed between the elastic membrane (4) and the valve membrane seat (3), a water inlet pipe (404) is fixedly connected to one side of the valve membrane seat (3), a water outlet valve (405) is further arranged on the valve membrane seat (3), a connecting pipe (406) connected with an external drainage pool is fixedly connected to one end of the water inlet pipe (404) far away from the valve membrane seat (3), a spring (407) is fixedly connected to the upper pressure plate (401), the spring (407) is fixedly connected to the inner wall of the valve cover (2), a valve rod (408) is fixedly connected to the lower pressure plate (402), a valve rod (408) is inserted into the flow cavity (101), and a valve plate (409) is fixedly connected to the top of the valve plate (408), the valve plate (409) bottom is provided with clean subassembly, clean subassembly including installation cover (5) and with set up drive gear (501) in installation cover (5), installation cover (5) are fixed the bottom of valve plate (409), drive gear (501) top with installation cover (5) inner wall rotates and is connected, drive gear (501) bottom through elasticity reset subassembly with installation cover (5) link to each other, through connection has two at least rack board (502) in installation cover (5), every rack board (502) all with drive gear (501) meshing is connected, rack board (502) are kept away from the clean cover of one end fixedly connected with (503) of installation cover (5), every clean cover (503) bottom equal fixedly connected with curved atress board (504), installation cover (5) are made for the colloid material, elasticity reset subassembly is including setting up wind spring (6) of installation cover (5) inner wall bottom, the one end of wind spring (6) avris with installation cover (5) fixed connection, the one end of wind spring (6) middle fixed connection has the montant (601), montant (501) outer wall fixed connection has the montant (601), montant (601) outer wall fixed connection has the montant (601), fixedly connected with slider (701) on connecting rod (7), at least two spout (702) have been seted up to valve plate (409) bottom, slider (701) with spout (702) slip joint.

2. The diaphragm mud valve according to claim 1, wherein: a filter screen is arranged at the position where the connecting pipe (406) is connected with the drainage pool.

3. The diaphragm type mud valve according to claim 1, wherein: the inner wall of the top of the outlet (103) is an inclined plane, and the bottom edge side of the valve plate (409) is an inclined plane and has the same inclination angle as the inclined plane on the outlet (103).

4. The diaphragm mud valve according to claim 1, wherein: the water outlet valve (405) is arranged at the bottom of the valve membrane seat (3), a high-pressure nozzle (8) is fixedly connected to the water outlet valve (405), and the high-pressure nozzle (8) is communicated with the flow cavity (101).

5. The diaphragm mud valve according to claim 1, wherein: the connecting tube (406) has an inner diameter at least twice the inner diameter of the inlet tube (404).

6. The diaphragm mud valve according to claim 1, wherein: the valve diaphragm seat (3) is connected with the valve cover (2) through a screw (9), and a pressing ring (901) is arranged at a position where the screw (9) penetrates through the elastic diaphragm (4).