CN113431920B

CN113431920B - Diaphragm valve

Info

Publication number: CN113431920B
Application number: CN202110808306.XA
Authority: CN
Inventors: 朱常有; 张乾峰; 张继; 梁天峰
Original assignee: Qili Holding Group Co ltd
Current assignee: Qili Holding Group Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-06-17
Anticipated expiration: 2041-07-16
Also published as: CN113431920A

Abstract

The application discloses diaphragm valve, it includes valve gap, valve body and diaphragm, the valve gap includes the first connecting portion of being connected with the valve body, the valve body includes inlet pipe, discharging pipe, the second connecting portion of connecting sealed ridge between inlet pipe and discharging pipe and being connected with first connecting portion, first connecting portion have seted up the mounting groove on the terminal surface of second connecting portion, the diaphragm inlays to be established in the mounting groove, be provided with the sealing ring on the cell wall of second connecting portion is kept away from to the mounting groove, set up the conducting hole with inlet pipe inner chamber and discharging pipe inner chamber homogeneous phase intercommunication on the second connecting portion, second connecting portion are fixed with sealed boss on the terminal surface of mounting groove, the diaphragm is elastic, be fixed with the sealing washer on the diaphragm on the terminal surface of conducting hole, the sealing washer is located the conducting hole. The diaphragm valve has the effect of improving the sealing performance of the diaphragm valve.

Description

Diaphragm valve

Technical Field

The application relates to the field of valves, in particular to a diaphragm valve.

Background

The sanitary diaphragm valve has the advantages of simple structure, attractive appearance, quick assembly and disassembly, flexible operation, small liquid resistance, safe and reliable use and the like. It is suitable for controlling water, gas, oil and corrosive medium in chemical, petroleum, metallurgical, water heating, food and medicine industries.

In the related art, the sanitary-grade diaphragm valve comprises a valve body and a diaphragm, a gap exists between the diaphragm and the valve body, liquid in the diaphragm valve easily flows out of the diaphragm valve from the gap between the valve body and the diaphragm, and the sealing performance is poor and needs to be improved.

Disclosure of Invention

In order to improve the sealing performance of the diaphragm valve, the application provides the diaphragm valve.

The diaphragm valve provided by the application adopts the following technical scheme:

the utility model provides a diaphragm valve, includes valve gap, valve body and diaphragm, the valve gap includes the first connecting portion of being connected with the valve body, the valve body includes inlet pipe, discharging pipe, connects sealed ridge between inlet pipe and discharging pipe and the second connecting portion of being connected with first connecting portion, the mounting groove has been seted up on the terminal surface of first connecting portion orientation second connecting portion, the diaphragm inlays to be established in the mounting groove, the mounting groove is kept away from and is provided with the sealing ring on the cell wall of second connecting portion, set up the conducting hole with inlet pipe inner chamber and discharging pipe inner chamber homogeneous phase intercommunication on the second connecting portion, second connecting portion are fixed with sealed boss on the terminal surface of mounting groove, the diaphragm piece is flexible, be fixed with the sealing washer on the diaphragm piece on the terminal surface of conducting hole, the sealing washer is located the conducting hole.

Through adopting above-mentioned technical scheme, sealed boss blocks that liquid flows out the diaphragm valve from the clearance between second connecting portion and the diaphragm piece, and the sealing washer has blockked during liquid flows in the gap between second connecting portion and the diaphragm piece, and the sealing ring has promoted the compactness that diaphragm piece and second connecting portion are connected, has further reduced liquid and has flowed out the diaphragm valve from the clearance between second connecting portion and the diaphragm piece. Through sealed boss, sealing ring and sealing washer, promoted the leakproofness of diaphragm valve for liquid is difficult for flowing out the diaphragm valve from the clearance between diaphragm and the valve body.

Optionally, the diaphragm piece includes the installation department and connects the separation portion that is close to sealed spine one side at the installation department, the interval that the terminal surface of installation department and installation department were kept away from to the separation portion increases progressively along being close to the sealing washer to keeping away from the direction of sealing washer, the terminal surface of sealed spine orientation conducting hole is the concave cambered surface.

Through adopting above-mentioned technical scheme, the terminal surface shape that the installation department was kept away from to separation portion and sealed ridge are towards the terminal surface shape phase-match of diaphragm piece, have improved the tight closeness of being connected between separation portion and the sealed ridge when the diaphragm valve closes for liquid is difficult to get into the inner chamber of discharging pipe from the inner chamber of inlet pipe.

Optionally, a valve flap is slidably disposed in the valve cover, a sealing rib is fixed on the blocking portion, and the sealing rib abuts against the sealing ridge when the valve flap presses the diaphragm to block the inner cavity of the feeding pipe and the inner cavity of the discharging pipe.

By adopting the technical scheme, when the diaphragm valve is closed, the valve clack extrudes the diaphragm to separate the inner cavity of the feeding pipe from the inner cavity of the discharging pipe, and the sealing rib is abutted to the sealing ridge, so that liquid in the inner cavity of the feeding pipe is prevented from entering the inner cavity of the discharging pipe, and the sealing performance of the diaphragm valve when the diaphragm valve is closed is further improved.

Optionally, the diaphragm further comprises a positioning portion connected to the mounting portion, the first connecting portion is provided with a positioning groove for the positioning portion to extend into, and the positioning groove is communicated with the mounting groove.

Through adopting above-mentioned technical scheme, thereby location portion stretches into the constant head tank and plays the positioning action to the diaphragm for when the diaphragm packs into the valve gap and covers valve gap and valve body, sealed muscle is aimed at sealed ridge, the staff of being convenient for installs the diaphragm.

Optionally, the valve cover is provided with a positioning hole, the valve flap is provided with a limiting hole, and when the valve flap extrudes the diaphragm to the position where the diaphragm obstructs the inner cavity of the feed pipe and the inner cavity of the discharge pipe, the positioning hole is aligned with the limiting hole.

By adopting the technical scheme, when the valve clack extrudes the diaphragm to the position where the diaphragm obstructs the inner cavity of the feeding pipe and the inner cavity of the discharging pipe, the positioning hole is aligned with the limiting hole, and any strip-shaped block such as a rod or a pin is inserted into the positioning hole and the limiting hole, so that the valve clack is limited to move towards the direction far away from the diaphragm, and the stability of the diaphragm and the sealing ridge in fitting is improved.

Optionally, a sampling tube communicated with the inner cavity of the discharge tube is connected to the discharge tube, and a sampling valve for opening and closing the inner cavity of the sampling tube is arranged on the sampling tube.

By adopting the technical scheme, when sampling, the sampling valve is opened, and the liquid in the discharge pipe flows out of the sampling pipe; and after sampling is finished, closing the sampling valve to close the inner cavity of the sampling pipe, so that the liquid in the discharge pipe is limited to flow out of the sampling pipe. Through above-mentioned structure, the staff of being convenient for carries out sample detection to the liquid in the discharging pipe.

Optionally, a hand wheel cover used for driving the valve clack to move is rotatably connected to the valve cover, a fixing hole penetrates through the hand wheel cover, a stop block is fixed to the valve cover, a plurality of stop holes are formed in the stop block, and the stop block can rotate until the fixing hole is aligned with any stop hole.

Through adopting above-mentioned technical scheme, rotate the hand wheel lid and close to the diaphragm valve and the fixed orifices that the hand wheel was covered is aligned with arbitrary locking hole, then insert arbitrary strip piece such as pole or round pin and establish in fixed orifices and above-mentioned locking hole to the restriction hand wheel lid rotates, and then is difficult for touching because of the staff mistake when making the diaphragm valve close and lead to the diaphragm valve to open.

Optionally, a sampling tube communicated with an inner cavity of the discharge tube is connected to the discharge tube, a sampling seat is connected to the sampling tube, a rotating cavity communicated with the inner cavity of the sampling tube and a plurality of sampling channels communicated with the rotating cavity are formed in the sampling seat, a rotating block is arranged in the rotating cavity in a rotating mode, a rotating motor used for driving the rotating block to rotate is arranged on the sampling seat, a communicating channel communicated with the inner cavity of the sampling tube is formed in the rotating block, the rotating block can rotate to communicate with any sampling channel through the communicating channel, a sliding cavity consistent with the number of the sampling channels is formed in the sampling seat, the sliding cavity is located below the sampling channel, communicating holes communicated with adjacent sliding cavities are formed in each sampling channel, and a liquid storage tube is arranged in the sliding cavity.

By adopting the technical scheme, the rotating motor is started once at intervals, the rotating block is driven to rotate to the conduction channel to be communicated with one sampling channel at each time, so that liquid in the discharging pipe flows into the liquid storage pipe in the sliding cavity through the sampling pipe, the conduction channel, the sampling channel and the communication hole in sequence. And the liquid in the discharge pipes at different time is respectively filled in each liquid storage pipe along with the rotation of the rotating block to the conduction channel to be aligned with different sampling channels.

Through above-mentioned structure to the automatic sample of liquid in the discharging pipe to different times, the staff only need the interval longer time change the test tube can.

Optionally, the sliding cavity is located below the sampling channel, a supporting block sliding in the vertical direction is arranged in the sliding cavity, a supporting spring for driving the supporting block to move towards the direction close to the communicating hole is connected to the supporting block, the liquid storage pipe is detachably connected to the supporting block, unlocking channels with the same number as the sampling channels are arranged on the sampling seat, each unlocking channel is respectively communicated with different sliding cavities and is communicated with a rotating cavity, an unlocking block is slidably arranged in each unlocking channel, an unlocking inclined surface is arranged at the end, away from the rotating block, of each unlocking block, faces to the adjacent communicating hole, a locking groove is arranged on each rotating block, each rotating block can rotate to be communicated with any unlocking channel, a locking block is slidably arranged in each locking groove, and a locking spring for driving the end of each locking block to extend out of the locking groove is connected to the locking block, the unlocking channel is used for inserting the end part of the locking block, and when the rotating block rotates to the state that the communication channel is communicated with one sampling channel, the locking groove is communicated with one unlocking channel.

Through adopting above-mentioned technical scheme, the turning block rotates when switching on the passageway and being linked together with one of them sample passageway, and locking groove is linked together with one of them unblock passageway, and under the effect of locking spring, the tip of locking block stretches out the locking groove and inserts in above-mentioned unblock passageway, has played the locking effect to the rotation of turning block, helps keeping switching on passageway and sample passageway intercommunication. The end part of the locking block is inserted into the unlocking channel, and meanwhile, the unlocking block in the unlocking channel is pushed to move towards the direction far away from the rotating block.

Along with the liquid that is sampled flows into the liquid storage pipe gradually, the weight of liquid storage pipe increases gradually to drive the supporting shoe and move down. The supporting block supports and presses on the unlocking inclined plane while moving, so that the unlocking block is pushed to move towards the direction close to the rotating block, and the unlocking block supports and presses on the locking block and pushes the locking block to move towards the direction close to the locking groove until the locking block is received in the locking groove. Through the structure, after a certain amount of sampled liquid is stored in the liquid storage pipe, the rotating block can continue to rotate, and the unlocking effect is achieved on the rotation of the rotating block.

Optionally, set up on the turning block and switch on the liquid groove that hinders that passageway and locking groove homogeneous phase communicate, it is provided with and hinders the liquid piece to hinder to slide in the liquid groove, hinder and seted up logical liquid hole on the liquid piece, hinder to be connected with on the liquid piece and be used for the drive to hinder the liquid spring that hinders that the liquid piece removed to being close to locking groove direction, hinder when liquid spring is in the natural state, lead to the liquid hole and switch on the passageway dislocation, hinder when the roof looks butt of liquid piece and unblock piece, lead to the liquid hole intercommunication and switch on the passageway, the locking piece is kept away from between the terminal surface of locking groove tank bottom and the terminal surface that the locking piece kept away from the sample seat diapire and has been seted up and has been hindered the liquid inclined plane.

Through adopting above-mentioned technical scheme, when the locking piece was in the locking groove of income under the effect of unblock piece, hinder the liquid piece and remove to the direction that is close to the locking groove under the effect of hindering liquid spring and gravity, the tip that hinders the liquid piece and hinder liquid inclined plane looks butt, lead to the liquid hole and lead to the passageway dislocation to liquid in the restriction sampling tube continues to flow into sampling channel through leading to the passageway, and then has restricted the liquid in the sampling tube and has continued to flow out and cause the waste.

When the rotating block rotates to the conduction channel to be communicated with one sampling channel, the locking block is inserted into one unlocking channel, the liquid blocking block moves upwards under the action of the liquid blocking inclined surface until the liquid blocking block is abutted to the top wall of the locking block, so that the liquid through hole is communicated with the conduction channel, and liquid in the discharge pipe can flow into the sampling channel through the sampling pipe, the sampling through pipe and the liquid through hole.

In summary, the present application includes at least one of the following advantages:

1. the sealing ring, the sealing boss and the sealing ring have multiple sealing effects, so that liquid in the valve body is prevented from flowing out of the diaphragm valve from a gap between the second connecting part and the diaphragm sheet, and the sealing performance of the diaphragm valve is improved;

2. when the diaphragm separates the inner cavity of the feed pipe from the inner cavity of the discharge pipe, the sealing rib is abutted against the sealing ridge, and the shape of the end surface of the separating part far away from the mounting part is matched with the shape of the sealing ridge facing the diaphragm, so that the sealing property of the diaphragm valve when the diaphragm valve is closed is further improved;

3. when the diaphragm valve is closed and the fixing hole on the hand wheel cover is aligned with any stop hole, any strip-shaped block such as a rod or a pin is inserted into the fixing hole and the stop hole, so that a worker is not easy to open the diaphragm valve due to mistaken touch of the hand wheel cover, the positioning hole is aligned with the limiting hole at the moment, any strip-shaped block such as a rod or a pin is inserted into the positioning hole and the limiting hole, the diaphragm valve is limited to move towards the direction far away from the diaphragm, and the stability of the diaphragm and the sealing ridge in the closing process of the diaphragm valve is improved through the structure.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present application.

Fig. 2 is a partial cross-sectional view taken along line a-a of fig. 1.

FIG. 3 is a schematic view showing the structure of a diaphragm in example 1 of the present application.

Fig. 4 is a schematic structural view of a valve body in embodiment 1 of the present application.

Fig. 5 is an exploded view of the cam cover, valve cover, and valve flap shown in example 1 of the present application.

Fig. 6 is a schematic structural diagram of embodiment 2 of the present application.

FIG. 7 is a partial cross-sectional view of a salient rotor block in example 2 of the present application.

FIG. 8 is a partial cross-sectional view of a highlighted liquid-resistant spring in example 2 of this application.

Description of reference numerals:

1. a valve body; 11. a feed pipe; 12. a sealing ridge; 13. a discharge pipe; 131. a shunt tube; 132. a connecting pipe; 133. a sampling tube; 134. a sampling valve; 14. a second connecting portion; 141. a via hole; 142. sealing the boss; 2. a valve cover; 21. a sliding part; 211. positioning holes; 212. a stopper block; 213. a stop hole; 22. a first connection portion; 221. mounting grooves; 222. a seal ring; 223. positioning a groove; 3. a diaphragm sheet; 31. an installation part; 311. a seal ring; 32. a blocking section; 321. sealing the rib; 33. a positioning part; 4. a valve clack; 41. a limiting hole; 5. a hand wheel cover; 51. a grip portion; 511. an anti-drop block; 512. a fixing hole; 52. a rotating part; 53. a fixed part; 6. a connecting assembly; 61. a switch pin; 62. a connecting rod; 63. a pushing block; 64. a connecting pin; 7. a sampling seat; 71. a rotation chamber; 72. rotating the motor; 73. a sampling channel; 731. a communicating hole; 74. an unlocking channel; 741. unlocking the block; 742. unlocking the inclined plane; 75. a sliding cavity; 8. rotating the block; 81. a locking groove; 811. a locking block; 812. a liquid blocking inclined plane; 813. a locking spring; 82. conducting a channel; 83. a liquid blocking groove; 831. a liquid blocking block; 832. a liquid through hole; 833. a liquid-resistant spring; 9. a support block; 91. a support spring; 92. a liquid storage pipe; 921. a limiting ring; 93. a limiting groove; 94. a first mounting hole; 95. and a second mounting hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses a diaphragm valve.

Example 1

Referring to fig. 1 and 2, the diaphragm valve includes a valve body 1, a valve cover 2 connected to the valve body 1, a diaphragm 3 disposed between the valve body 1 and the valve cover 2, a valve flap 4 for pushing the diaphragm 3, and a hand wheel cover 5 for driving the valve flap 4 to move, wherein the valve flap 4 is slidably disposed in the valve body 1, and the hand wheel cover 5 is rotatably connected to the valve cover 2.

Referring to fig. 2 and 3, the diaphragm 3 is a rubber sheet having elasticity, the diaphragm 3 includes a mounting portion 31, a blocking portion 32 connected to the mounting portion 31, and a positioning portion 33 connected to the mounting portion 31, and the mounting portion 31, the blocking portion 32, and the positioning portion 33 are integrally molded. A seal ring 311 is fixed to the mounting portion 31, and the seal ring 311 is provided along the blocking portion 32. The distance between the end surface of the blocking portion 32 away from the mounting portion 31 and the mounting portion 31 increases gradually in the direction from the sealing ring 311 to the sealing ring 311. A sealing rib 321 is fixed on one side of the blocking portion 32 away from the mounting portion 31, and the sealing rib 321 extends along the direction from the positioning portion 33 to the mounting portion 31.

Referring to fig. 2 and 4, the valve body 1 includes a feed pipe 11, a sealing ridge 12, a discharge pipe 13, and a second connection portion 14. The sealing ridge 12 is fixed between the feeding pipe 11 and the discharging pipe 13, and the second connecting portion 14 is fixedly connected with the feeding pipe 11, the sealing ridge 12 and the discharging pipe 13. The end face of the second connecting part 14 far away from the sealing ridge 12 is provided with a via hole 141, the via hole 141 is communicated with the inner cavity of the feeding pipe 11 and the inner cavity of the discharging pipe 13, and the end face of the via hole 141 facing the sealing ridge 12 is a concave cambered surface. When the valve flap 4 pushes the diaphragm 3 until the blocking portion 32 abuts against the sealing ridge 12, the sealing rib 321 abuts against the sealing ridge 12. A sealing boss 142 is fixed on the second connecting portion 14, the sealing boss 142 is an annular boss, and the sealing boss 142 is disposed along the through hole 141 and faces away from the opening of the sealing ridge 12.

Referring to fig. 4, the tapping pipe 13 includes a shunt tube 131 for shunting and a connection tube 132 connecting the shunt tube 131 to the sealing ridge 12. The connection tube 132 is fixed with a sampling tube 133, and the inner cavity of the sampling tube 133 is communicated with the inner cavity of the connection tube 132. The sampling pipe 133 is provided with a sampling valve 134, the sampling valve 134 is used for opening and closing the inner cavity of the sampling pipe 133, the sampling valve 134 can be a ball valve, a butterfly valve, a diaphragm valve and the like, and the diaphragm valve is adopted in the embodiment of the application. During sampling, the sampling valve 134 is opened to open the inner cavity of the sampling tube 133, and the liquid flows out of the sampling tube 133 through the connecting tube 132; after the sampling is finished, the sampling valve 134 is closed, so that the inner cavity of the sampling tube 133 is closed to block the liquid from flowing out of the sampling tube 133.

Referring to fig. 2 and 5, the bonnet 2 includes a sliding portion 21 and a first connecting portion 22 fixedly connected to the sliding portion 21, and the first connecting portion 22 is connected to the second connecting portion 14 by a bolt. An installation groove 221 is formed in the end surface of the first connection portion 22 away from the sliding portion 21, the installation groove 221 is used for embedding the installation portion 31, and a sealing ring 222 is fixed on the groove wall of the installation groove 221 close to the sliding portion 21.

Referring to fig. 3 and 5, a positioning groove 223 is formed on a groove wall of one side of the mounting groove 221, the positioning groove 223 is used for the positioning portion 33 to extend into, and the positioning portion 33 and the positioning groove 223 play a role in positioning the sealing rib 321. When the positioning portion 33 is inserted into the positioning groove 223, the seal rib 321 is aligned with the seal ridge 12.

Referring to fig. 2 and 5, when the diaphragm 3 is mounted, the mounting portion 31 is first fitted into the mounting groove 221, the first connecting portion 22 and the second connecting portion 14 are then closed, and finally the first connecting portion 22 and the second connecting portion 14 are connected by bolts. After the installation, the blocking portion 32 is located on one side of the installation portion 31 close to the sealing ridge 12, the sealing rib 321 faces the sealing ridge 12, the sealing ring 311 is located in the through hole 141, and the sealing ring 311, the sealing boss 142 and the sealing ring 222 are sequentially the sealing ring 311, the sealing boss 142 and the sealing ring 222 along the direction from the closing of the blocking portion 32 to the direction away from the blocking portion 32.

Referring to fig. 5, a positioning hole 211 is formed in a side wall of the sliding portion 21, a limiting hole 41 is formed in the valve flap 4, and when the valve flap 4 presses the diaphragm 3 to block an inner cavity of the inlet pipe 11 and an inner cavity of the outlet pipe 13, the positioning hole 211 is aligned with the limiting hole 41, and a bar-shaped block such as a rod or a pin is inserted into the limiting hole 41 through the positioning hole 211, so that the valve flap 4 is limited from moving in a direction away from the diaphragm 3.

Referring to fig. 2, the sliding portion 21 is connected to the connecting assembly 6, the connecting assembly 6 includes a switch pin 61 penetrating and rotatably connected to the handwheel cover 5, a connecting rod 62 penetrating and screwed into the handwheel cover 5, and a pushing block 63 fixedly connected to a side of the connecting rod 62 away from the switch pin 61, and the switch pin 61 is fixedly connected to the connecting rod 62. The pushing block 63 is used for pushing the valve clack 4, and a connecting pin 64 is connected to the pushing block 63 through a pin.

Referring to fig. 5, the handwheel cover 5 includes a grip 51, a rotating portion 52, and a fixing portion 53, six retaining blocks 511 are fixed to an outer wall of the grip 51, and the retaining blocks 511 are uniformly distributed along an axial center line of the grip 51 in a circumferential direction. The anti-drop block 511 increases the contact area with the hand wheel cover 5 when the worker rotates the hand wheel cover 5, and helps the worker rotate the hand wheel cover 5.

Referring to fig. 5, the rotating portion 52 and the fixing portion 53 are fixed to the inner wall of the grip portion 51, and one end of the rotating portion 52 is fixedly connected to one end of the fixing portion 53. The end surface of the grip portion 51 away from the rotating portion 52 is opened with a fixing hole 512 penetrating the grip portion 51 and the fixing portion 53. A stop block 212 is fixed on the outer wall of the sliding part 21, eight stop holes 213 are formed in the stop block 212, the stop holes 213 are uniformly distributed along the circumferential outer wall of the stop block 212, and the hand wheel cover 5 can rotate until the fixing hole 512 is aligned with any stop hole 213. When the diaphragm valve is closed and the fixing hole 512 rotates to be aligned with one of the stop holes 213, a strip-shaped block such as a band rod or a pin is inserted into the fixing hole 512 and the stop hole 213, so that the rotation of the handwheel cover 5 is limited, and the diaphragm valve is not easy to open due to the fact that a worker mistakenly touches the handwheel cover 5.

The implementation principle of the embodiment 1 is as follows: when the diaphragm valve is closed, the hand wheel cover 5 is rotated to drive the connecting assembly 6 and the connecting pin 64 to push the valve flap 4, the valve flap 4 pushes the diaphragm 3 to deform in a direction close to the sealing ridge 12 until the blocking portion 32 and the sealing rib 321 tightly abut against the sealing ridge 12, then strip-shaped blocks such as a rod or a pin are inserted into the fixing hole 512 and the stop hole 213, and then the strip-shaped blocks such as a rod or a pin are inserted into the positioning hole 211 and the limiting hole 41. The sealing rib 321 further prevents liquid in the feeding pipe 11 from entering the discharging pipe 13, and the sealing ring 311, the sealing boss 142 and the sealing ring 222 achieve multiple sealing effects, so that the sealing performance of the diaphragm valve is improved, and liquid is prevented from flowing out of the diaphragm valve from a gap between the second connecting portion 14 and the diaphragm 3.

Example 2

Referring to fig. 6 and 7, the present embodiment is different from embodiment 1 in that: the sampling tube 133 is fixedly connected with a sampling seat 7, the sampling seat 7 is provided with a rotating cavity 71 communicated with the inner cavity of the sampling tube 133, and a rotating block 8 is rotatably connected in the rotating cavity 71. A rotating motor 72 is fixed on the bottom wall of the sampling seat 7, an output shaft of the rotating motor 72 penetrates through the rotating cavity 71 and is fixedly connected with the rotating block 8, and the rotating motor 72 is used for driving the rotating block 8 to rotate.

Referring to fig. 7, a locking groove 81 is formed in the circumferential outer wall of the rotating block 8, a locking block 811 is slidably disposed in the locking groove 81, and a liquid blocking inclined plane 812 is formed between an end face of the locking block 811 away from the groove bottom of the locking groove 81 and an end face of the locking block 811 away from the bottom wall of the sampling seat 7. The locking block 811 is connected with a locking spring 813, the locking spring 813 expands and contracts along the sliding direction of the locking block 811, two ends of the locking spring 813 are fixedly connected with the groove bottom of the locking groove 81 and one side of the locking block 811 facing the locking groove 81, respectively, and the locking spring 813 is used for driving the end of the locking block 811 to extend out of the locking groove 81.

Referring to fig. 7 and 8, the turning block 8 is provided with a conduction channel 82, the cross section of the conduction channel 82 is L-shaped, the conduction channel 82 is communicated with the top wall and the circumferential side wall of the turning block 8, and the conduction channel 82 is communicated with the inner cavity of the sampling tube 133. The liquid blocking groove 83 communicated with the conduction channel 82 and the locking groove 81 is formed in the bottom wall of the rotating block 8, a liquid blocking block 831 is arranged in the liquid blocking groove 83 in a sliding mode, and the liquid blocking block 831 is used for blocking the conduction channel 82. A liquid through hole 832 is formed in the liquid blocking block 831, and the liquid through hole 832 is used for communicating the communication channel 82. Two liquid blocking springs 833 are fixed on the liquid blocking block 831, the other ends of the liquid blocking springs 833 are fixedly connected with the top wall of the liquid blocking groove 83, the liquid blocking springs 833 stretch along the sliding direction of the liquid blocking block 831, and the liquid blocking springs 833 are used for driving the liquid blocking block 831 to move towards the direction close to the locking groove 81. When the liquid blocking spring 833 is in a natural state, the liquid through hole 832 is dislocated with the conducting channel 82, and the liquid blocking block 831 blocks the conducting channel 82. When the liquid blocking block 831 abuts against the top wall of the locking block 811, the liquid through hole 832 communicates with the communication channel 82.

Referring to fig. 7, four sampling passages 73, four unlocking passages 74 and four sliding cavities 75 are formed in the sampling seat 7, and each sampling passage 73 and each unlocking passage 74 are communicated with the rotating cavity 71. Each sampling channel 73 extends along the direction from the position close to the rotating cavity 71 to the position far away from the rotating cavity 71, and each sampling channel 73 is uniformly distributed along the circumferential direction of the axial lead of the rotating seat.

Referring to fig. 7, the unlocking channel 74 is aligned with the extending direction of the adjacent sampling channel 73, and each unlocking channel 74 is located below the adjacent sampling channel 73, and the unlocking channel 74 is used for the end of the locking block 811 to extend into. An unlocking block 741 is slidably disposed in the unlocking passage 74, and an unlocking inclined plane 742 is disposed between an end surface of the unlocking block 741 away from the rotation cavity 71 and an end surface of the unlocking block 741 away from the bottom wall of the sampling seat 7. The turning block 8 can be turned to the communicating channel 82 to communicate with any one of the sampling channels 73, the locking groove 81 to communicate with any one of the unlocking channels 74, and when the turning block 8 is turned to the communicating channel 82 to communicate with one of the sampling channels 73, the unlocking channel 74 adjacent to the sampling channel 73 communicates with the locking groove 81.

Referring to fig. 6 and 7, the sliding cavities 75 extend in the vertical direction, each sliding cavity 75 is respectively communicated with a different unlocking channel 74, and each sliding cavity 75 is respectively located at one end of the adjacent unlocking channel 74 far away from the rotating cavity 71 and is communicated with the side wall of the sampling seat 7. The sliding cavity 75 is located below the sampling channels 73, a communication hole 731 communicated with the sliding cavity 75 is formed in the bottom wall of each sampling channel 73, and the communication hole 731 is located at one end, far away from the rotating cavity 71, of each sampling channel 73. The supporting block 9 which slides along the vertical direction is arranged in the sliding cavity 75, the two ends of the supporting block 9 are both provided with supporting springs 91, the supporting springs 91 stretch along the sliding direction of the supporting block 9, the two ends of the supporting springs 91 are fixedly connected with the supporting block 9 and the bottom wall of the sliding cavity 75 respectively, and the supporting block 9 is abutted to the top wall of the sliding cavity 75 when the supporting springs 91 are in a natural state.

Referring to fig. 7, a liquid storage tube 92 is connected to the support block 9, and a limit ring 921 is connected to a side wall of the liquid storage tube 92. The top wall of the supporting block 9 is provided with a limiting groove 93 for the limiting ring 921 to extend into, the bottom of the limiting groove 93 is penetrated with a first mounting hole 94 for the liquid storage tube 92 to insert, and the limiting groove 93 and the first mounting hole 94 are both communicated with the side wall of the supporting block 9 far away from the rotating cavity 71. The bottom wall of the sliding cavity 75 is penetrated with a second mounting hole 95 for the liquid storage tube 92 to extend into, and the side wall of the sampling seat 7 of the second mounting hole 95 is communicated. When the reservoir 92 is inserted into the first mounting hole 94, the orifice of the reservoir 92 is aligned with the communication hole 731.

The implementation principle of the embodiment 2 is as follows: when the liquid in the discharging pipe 13 is sampled, the rotating motor 72 is started to rotate the output shaft of the motor by 90 °, the output shaft of the rotating motor 72 drives the rotating block 8 to rotate, at this time, the rotating block 8 rotates until the locking groove 81 is aligned with one unlocking channel 74, the sampling channel 73 adjacent to the unlocking channel 74 is aligned with the conducting channel 82, and the end of the locking block 811 is inserted into the unlocking channel 74 under the action of the locking spring 813, so that the rotating block 8 is limited from further rotating. At the same time, the locking block 811 also pushes the unlocking block 741 to move away from the turning block 8. In the moving process of the locking block 811, the liquid blocking block 831 abutting against the liquid blocking inclined surface 812 moves upwards along the liquid blocking inclined surface 812 until the liquid blocking block 831 abuts against the top wall of the locking block 811, so that the liquid through hole 832 is communicated with the conducting channel 82, and thus the liquid in the discharging pipe 13 finally flows into the liquid storage pipe 92 in the sliding chamber 75 through the sampling pipe 133, the conducting channel 82, the liquid through hole 832, the sampling channel 73 and the communicating hole 731.

With the continuous accumulation of the liquid in the liquid storage tube 92, the liquid storage tube 92 drives the supporting block 9 to move downwards under the action of gravity, the supporting spring 91 is gradually compressed, and the supporting block 9 is pressed against the unlocking inclined plane 742 and pushes the unlocking block 741 to move towards the direction close to the rotating block 8. The unlocking piece 741 pushes the locking piece 811 to move toward the locking spring 813 until the locking piece 811 is received in the locking groove 81. In the process that the locking block 811 moves into the locking groove 81, the liquid blocking inclined surface 812 moves into the position below the liquid blocking block 831, the liquid blocking block 831 moves towards the direction close to the locking groove 81 under the action of the liquid blocking spring 833 and the gravity until the locking block 811 is completely accommodated in the locking groove 81, at the moment, the liquid through hole 832 is dislocated with the conducting channel 82, and the liquid blocking block 831 blocks the conducting channel 82, so that liquid is limited from continuously entering the sampling channel 73 through the conducting channel 82.

After a certain time, the rotation motor 72 is started again to rotate the rotation block 8 by 90 ° again, so that the second liquid storage tube 92 is filled with the liquid in the discharge tube 13. And so on until the four liquid storage pipes 92 are filled with the liquid in the discharge pipe 13. Through the structure, under the condition that a worker is not needed, the diaphragm valve can automatically sample at regular time by setting the time interval of starting the rotating motor 72 every time. And after sampling, taking out the liquid storage pipe 92 filled with the liquid, and then replacing the liquid storage pipe 92 with a new one.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A diaphragm valve, includes valve gap (2), valve body (1) and diaphragm (3), its characterized in that: valve gap (2) include first connecting portion (22) be connected with valve body (1), valve body (1) include inlet pipe (11), discharging pipe (13), connect sealed spine (12) between inlet pipe (11) and discharging pipe (13) and second connecting portion (14) be connected with first connecting portion (22), mounting groove (221) have been seted up on the terminal surface of first connecting portion (22) orientation second connecting portion (14), diaphragm (3) are inlayed and are established in mounting groove (221), be provided with sealing ring (222) on the cell wall that second connecting portion (14) were kept away from in mounting groove (221), set up on second connecting portion (14) with inlet pipe (11) inner chamber and discharging pipe (13) inner chamber homogeneous phase intercommunication conducting hole (141), be fixed with sealed boss (142) on the terminal surface of second connecting portion (14) orientation mounting groove (221), the diaphragm (3) has elasticity, a sealing ring (311) is fixed on the end face of the diaphragm (3) facing to the through hole (141), and the sealing ring (311) is positioned in the through hole (141);

the device is characterized in that a sampling tube (133) communicated with the inner cavity of the discharge tube (13) is connected onto the discharge tube (13), a sampling seat (7) is connected onto the sampling tube (133), a rotating cavity (71) communicated with the inner cavity of the sampling tube (133) and a plurality of sampling channels (73) communicated with the rotating cavity (71) are formed in the sampling seat (7), a rotating block (8) is rotatably arranged in the rotating cavity (71), a rotating motor (72) used for driving the rotating block (8) to rotate is arranged on the sampling seat (7), a conduction channel (82) communicated with the inner cavity of the sampling tube (133) is formed in the rotating block (8), the rotating block (8) can rotate to the conduction channel (82) to be communicated with any sampling channel (73), and sliding cavities (75) with the same number as the sampling channels (73) are formed in the sampling seat (7), the sliding cavities (75) are positioned below the sampling channels (73), each sampling channel (73) is provided with a communicating hole (731) communicated with the adjacent sliding cavity (75), and a liquid storage pipe (92) is arranged in each sliding cavity (75);

the sliding cavity (75) is located below the sampling channel (73), a supporting block (9) which slides along the vertical direction is arranged in the sliding cavity (75), a supporting spring (91) which is used for driving the supporting block (9) to move towards the direction close to the communication hole (731) is connected onto the supporting block (9) in a connecting mode, the liquid storage pipe (92) is detachably connected onto the supporting block (9), unlocking channels (74) which are consistent with the sampling channel (73) in number are formed in the sampling seat (7), each unlocking channel (74) is respectively communicated with different sliding cavities (75), each unlocking channel (74) is communicated with the rotating cavity (71), an unlocking block (741) is arranged in each unlocking channel (74) in a sliding mode, an unlocking inclined surface (742) is formed in the end portion, far away from the rotating block (8), of each unlocking block (741), and the unlocking inclined surface (742) faces to the adjacent communication hole (731), locking groove (81) has been seted up on turning block (8), turning block (8) can rotate locking groove (81) and to be linked together with arbitrary unblock passageway (74), it is provided with locking block (811) to slide in locking groove (81), be connected with locking spring (813) that are used for driving the locking piece tip and stretch out locking groove (81) on locking block (811), the tip that is used for supplying locking block (811) in unblock passageway (74) is inserted and is established, turning block (8) rotate to switch on when passageway (82) is linked together with one of them sample passageway (73), locking groove (81) are linked together with one of them unblock passageway (74).

2. A diaphragm valve according to claim 1, wherein: diaphragm (3) include installation department (31) and connect separation portion (32) that installation department (31) is close to seal ridge (12) one side, the interval that installation department (31) was kept away from in separation portion (32) is followed and is close to sealing washer (311) to keeping away from the direction of sealing washer (311) and increase progressively with installation department's (31) interval, seal ridge (12) are the concave arc face towards the terminal surface of conducting hole (141).

3. A diaphragm valve according to claim 2, wherein: the valve cover (2) is internally provided with a valve clack (4) in a sliding manner, a sealing rib (321) is fixed on the separation part (32), and when the valve clack (4) extrudes the diaphragm (3) to separate the inner cavity of the feeding pipe (11) from the inner cavity of the discharging pipe (13) through the diaphragm (3), the sealing rib (321) is abutted to the sealing ridge (12).

4. A diaphragm valve according to claim 3, wherein: the diaphragm (3) further comprises a positioning part (33) connected to the mounting part (31), the first connecting part (22) is provided with a positioning groove (223) for the positioning part (33) to extend into, and the positioning groove (223) is communicated with the mounting groove (221).

5. A diaphragm valve according to claim 3, wherein: the valve cover (2) is provided with a positioning hole (211), the valve clack (4) is provided with a limiting hole (41), and when the valve clack (4) extrudes the diaphragm (3) to a position where the diaphragm (3) separates the inner cavity of the feeding pipe (11) from the inner cavity of the discharging pipe (13), the positioning hole (211) is aligned with the limiting hole (41).

6. A diaphragm valve according to claim 1, wherein: the discharging pipe (13) is connected with a sampling pipe (133) communicated with the inner cavity of the discharging pipe (13), and the sampling pipe (133) is provided with a sampling valve (134) for opening and closing the inner cavity of the sampling pipe (133).

7. A diaphragm valve according to claim 1, wherein: the valve cover (2) is rotatably connected with a hand wheel cover (5) used for driving the valve clack (4) to move, a fixing hole (512) penetrates through the hand wheel cover (5), a stop block (212) is fixed on the valve cover (2), a plurality of stop holes (213) are formed in the stop block (212), and the stop block (212) can be rotated to the fixing hole (512) to be aligned with any stop hole (213).

8. A diaphragm valve according to claim 1, wherein: the turning block (8) is provided with a liquid resistance groove (83) which is communicated with the conduction channel (82) and the locking groove (81), a liquid blocking block (831) is slidably arranged in the liquid blocking groove (83), a liquid through hole (832) is formed in the liquid blocking block (831), the liquid blocking block (831) is connected with a liquid blocking spring (833) which is used for driving the liquid blocking block (831) to move towards the direction close to the locking groove (81), when the liquid blocking spring (833) is in a natural state, the liquid through hole (832) and the conducting channel (82) are staggered, when the liquid blocking block (831) is abutted against the top wall of the unlocking block (741), the liquid through hole (832) is communicated with the conducting channel (82), and a liquid blocking inclined plane (812) is arranged between the end surface of the locking block (811) far away from the groove bottom of the locking groove (81) and the end surface of the locking block (811) far away from the bottom wall of the sampling seat (7).