A TDD spray valve

Abstract

The present invention relates to the field of TDD spray valves, and specifically to a TDD spray valve, comprising a spray head, a spray structure, a supporting structure, a pneumatic structure, a sealing structure, a driving structure and a cleaning structure; a spray head for multi-angle spraying is provided on the spray structure for connecting a reactor and a water pipe, and the spray head and the spray structure are slidably connected, so that it is convenient to control the height of the spray head inside the reactor through the spray structure, so as to achieve a better cleaning effect on the reactor; a cleaning structure for flushing the spray head is provided on the spray structure, and the spray structure is connected to the cleaning structure, so that it is convenient to clean the spray head through the cleaning structure when the spray head is stored, effectively preventing waste from adhering to the spray head, making the connection between the spray head and the spray structure tighter, and at the same time reducing the water pressure between the spray head and the spray structure when the spray head is stored.

Description

Technical Field

[0001] The invention relates to the field of TDD spray valves, in particular to a TDD spray valve. Background Art

[0002] After the polymerization reaction in the PVC resin production process, a large amount of material residue is stained in the polymerization kettle. In order to ensure the next resin production, the polymerization kettle needs to be cleaned. The existing spray valve is mainly composed of a plunger tube, a water injection pipe arranged at the top of the plunger tube, and a nozzle arranged at the bottom of the plunger tube. When cleaning the polymerization kettle, the operator holds the plunger tube and drops the nozzle into the polymerization kettle, so that the nozzle slowly sprays from top to bottom in the polymerization kettle.

[0003] However, the speed of the manual hand-held falling nozzle is unstable, and the inner wall of the polymerization kettle is not cleaned thoroughly, which affects the cleanliness of the resin production again. In addition, the end cover of the reactor needs to be opened for each cleaning, which has poor operational flexibility and affects the efficiency and quality of the cleaning of the interior of the reactor. At the same time, the PVC resin polymer is easily adhered to the nozzle during the cleaning process, and improper operation can easily cause the spray valve to be blocked. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a TDD spray valve.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a TDD spray valve, including a nozzle, a spray structure, a supporting structure, a pneumatic structure, a sealing structure, a driving structure and a cleaning structure; the spray structure used to connect the reaction kettle and the water pipe is provided with the nozzle for multi-angle spraying, and the nozzle and the spray structure are slidably connected; the spray structure is provided with the supporting structure, and the end of the supporting structure is fixed to the pneumatic structure; the spray structure is connected to the pneumatic structure for pneumatic drive, and the driving structure is provided at one end of the pneumatic structure away from the supporting structure, and the driving structure is provided with the sealing structure for controlling the sealing of the pneumatic structure; the spray structure is provided with the cleaning structure for flushing the nozzle.

[0006] Specifically, the spray structure includes a valve stem, a valve seat, a transmission rod, a connecting pipe, a piston rod, a connecting rod and a through hole, the spray head is fixed to the piston rod, the piston rod and the valve stem are slidably connected, the spray head and the valve stem are slidably connected, the valve seat is provided at one end of the valve stem away from the spray head, the connecting rod is provided at one end of the piston rod away from the spray head, the transmission rod is provided at one end of the connecting rod away from the piston rod, the transmission rod is slidably connected to the valve seat, the piston rod and its connecting rod are both hollow cylindrical structures, two through holes are provided on the connecting rod, the through holes are communicated with the internal accommodating cavity of the connecting rod, the connecting pipe for fixing the water pipe is fixed on the valve stem, and the connecting pipe is communicated with the through hole.

[0007] Specifically, the cleaning structure includes a second sealing plug, a guide groove, a guide hole, a sealing block and a transmission block. The end of the valve stem facing the nozzle is provided with a circular guide groove, one end of the guide hole passes through the valve stem and is connected to the guide groove, and the other end of the guide hole is connected to the accommodating cavity between the connecting rod and the valve seat. A plurality of accommodating cavities connected to the guide groove are provided in a circumferential array on the valve stem, and a plurality of second sealing plugs are provided in a circumferential array on the nozzle. The cross-section of the second sealing plug along the axial direction of the valve stem is trapezoidal, and the cross-section of the second sealing plug along the axial direction perpendicular to the valve stem is semicircular. The transmission block with an L-shaped cross-section is fixed to the connecting rod, and the sealing block is fixed to the transmission block.

[0008] Specifically, the pneumatic structure includes a driving sleeve, a cover plate, a connecting port, a driving piston and a first return spring. The transmission rod is slidably connected to the driving sleeve, the driving piston is fixed to the end of the transmission rod, the driving piston is slidably connected to the driving sleeve, the transmission rod passes through the first return spring, the two ends of the first return spring respectively abut against the driving piston and the driving sleeve, the connecting port passes through the driving sleeve, and the cover plate and the driving sleeve are detachably connected.

[0009] Specifically, the support structure includes a reinforcement rod, two fixed rings and a first indicator plate, the two fixed rings are respectively fixed to the valve seat and the drive sleeve, the transmission rod is slidably connected to the fixed rings, a plurality of reinforcement rods are arranged between the two fixed rings, the first indicator plate is fixed to the transmission rod, and the first indicator plate is slidably connected to one of the reinforcement rods.

[0010] Specifically, the driving structure includes a driving rod, a handwheel and a transmission piston. The transmission piston is slidingly connected to the driving sleeve, the connecting port is connected to the accommodating cavity surrounded by the driving piston and the transmission piston, the driving rod is rotationally connected to the cover plate, the driving rod is threadedly connected to the transmission piston, and the handwheel is fixed to the driving rod.

[0011] Specifically, the sealing structure includes a fixed rod, a connecting block, a second indicator plate, a sliding sleeve, a first sealing plug, a second return spring and a sliding rod, one end of the fixed rod is fixed to the cover plate, the other end of the fixed rod is fixed to the connecting block, the driving rod is rotatably connected to the connecting block, the sliding rod is fixed to the end of the connecting block away from the fixed rod, the sliding sleeve is slidably connected to the sliding rod, the second return spring is arranged between the sliding sleeve and the sliding rod, the second indicator plate is arranged on the sliding sleeve, the second indicator plate is slidably connected to the driving rod, the end of the sliding sleeve is provided with the first truncated cone-shaped sealing plug, and the first sealing plug is in contact with the transmission piston.

[0012] Beneficial effects of the present invention:

[0013] (1) A TDD spray valve described in the present invention is provided with a spray head for multi-angle spraying on a spray structure for connecting the reactor and the water pipe, and the spray head is slidably connected to the spray structure, so that the height of the spray head inside the reactor can be controlled by the spray structure, thereby achieving a better cleaning effect on the reactor, that is, when cleaning the reactor, the water valve at the end of the connecting pipe is opened, and at the same time, the transmission rod slides between the valve seat, and the transmission rod drives the connecting rod and the valve stem to slide, so that the connecting rod drives the piston rod and the valve stem to slide, so that the spray head slides out of the valve stem, and hot water enters the connecting rod from the through hole through the connecting pipe, and then enters the interior of the spray head from the connecting rod through the piston rod. The spray head is provided with a plurality of spray slots, which can be In addition to ensuring high-precision spraying without dead angles, it can also spray and rinse up and down. The spray groove is narrow inside and wide outside, so that the nozzle is not easy to break. Hot water passes through the nozzle to spray without dead angles and spray up and down to rinse the inside of the reactor, thereby making the flushing efficiency higher and more stable. At the same time, the piston rod, connecting rod and transmission rod adopt three-section connection, and the dimensions with high processing precision are concentrated on the piston rod and transmission rod, which simplifies the middle section processing and can be changed quickly and at low cost. When the use is over, the transmission rod slides away from the valve seat, so that the transmission rod drives the connecting rod, the connecting rod drives the piston rod, and the piston rod drives the nozzle to be stored inside the valve stem, thereby avoiding damage to the nozzle during the PVC resin processing, making the operation more flexible and convenient.

[0014] (2) In the TDD spray valve described in the present invention, a cleaning structure for flushing the spray head is provided on the spray structure, and the spray structure and the cleaning structure are connected, so that when the spray head is stored, the spray head can be cleaned through the cleaning structure, which effectively prevents waste from adhering to the spray head, makes the connection between the spray head and the spray structure tighter, and reduces the water pressure between the spray head and the spray structure when the spray head is stored; that is, when the spray head slowly slides out of the valve stem, hot water enters the connecting rod from the through hole through the connecting pipe, and then enters the interior of the spray head from the connecting rod through the piston rod. The spray head is provided with a plurality of spray grooves, which can ensure that there is no dead angle spraying, and can also spray and flush up and down. At the same time, the water flow between the connecting rod and the valve seat passes through the guide hole and then enters the interior of the guide groove, and then sprays on the spray head from the accommodating cavity between the valve stem and the spray head, thereby reducing the impact force of the spray head on the valve stem, and facilitating flushing of the spray head. The nozzle is effectively prevented from adhering to the nozzle by the second sealing plug. When the nozzle completely slides out of the valve stem, the transmission block drives the sealing block to seal the guide hole, so that the water flow is completely sprayed from the nozzle to clean the reactor. After use, the transmission rod drives the connecting rod, and the connecting rod drives the transmission block, so that the sealing block on the transmission block does not seal the guide hole, so that the water flows through the guide hole, and then passes through the guide groove and is completely sprayed on the nozzle from the end of the valve stem, thereby effectively preventing the waste from adhering to the nozzle when the nozzle is stored, thereby making the use effect of the nozzle better. At the same time, the cross-section of the second sealing plug along the axial direction of the valve stem is trapezoidal, and the cross-section of the second sealing plug along the axial direction perpendicular to the valve stem is semicircular, thereby facilitating the guidance of the nozzle, making the sealing between the nozzle and the valve stem better, and effectively preventing the PVC resin from entering the gap between the nozzle and the valve stem when the reactor is used.

[0015] (3) A TDD spray valve described in the present invention has a support structure on the spray structure, and the end of the support structure is fixed to the pneumatic structure; the spray structure is connected to the pneumatic structure for pneumatic drive, and the end of the pneumatic structure away from the support structure is provided with a driving structure, and the driving structure is provided with a sealing structure for controlling the sealing of the pneumatic structure, so that it is convenient to drive the spray structure through the pneumatic structure to adjust the position of the nozzle, and at the same time, it is convenient to drive the pneumatic structure through the driving structure, and the spray structure is manually driven by the driving structure. The sealing structure provided on the driving structure is convenient for alternating use of the driving structure and the pneumatic structure, so that the operation is more convenient and flexible, that is: when the pneumatic structure is used for driving, the handwheel is held by hand, and the driving rod is driven by the handwheel to rotate the driving rod, so that the driving rod and the connecting block and its cover plate rotate, and the fixed rod cooperates with the setting of the connecting block, so that the driving of the driving rod is more stable, and the driving rod thread drives the transmission piston to slide toward the driving sleeve, so that the transmission piston abuts against the first sealing plug, and the first sealing plug abuts against the sliding connection between the sliding sleeve and the end cover, and the sliding sleeve When the first piston is in the airtight position, the piston rod is in the airtight position, and the piston rod is in the airtight position, so that ... so that the piston rod is in the airtight position, and the piston rod is in the airtight position, so that the piston rod is in the airtight position, so that the piston rod is in the airtight position, so that the piston rod is in the airtight position, so that the piston rod is in the airtight position, so that the piston rod is in the airtight position, so that the piston rod is in the airtight position, so that the piston rod is in the airt BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 A schematic diagram of the overall structure of a TDD spray valve provided by the present invention;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of part A is shown;

[0019] Figure 3 for Figure 2 A schematic diagram of the connection structure between the spray structure and the support structure shown;

[0020] Figure 4 for Figure 3An enlarged schematic diagram of part B is shown;

[0021] Figure 5 for Figure 3 An enlarged schematic diagram of part C is shown;

[0022] Figure 6 for Figure 3 An enlarged schematic diagram of the D portion shown;

[0023] Figure 7 for Figure 1 Schematic diagram of the connection structure between the sealing structure and the driving structure shown.

[0024] In the figure: 1. nozzle, 2. spray structure, 21. valve stem, 22. valve seat, 23. transmission rod, 24. connecting pipe, 25. piston rod, 26. connecting rod, 27. through hole, 3. supporting structure, 31. reinforcement rod, 32. fixing ring, 33. first indicator plate, 4. pneumatic structure, 41. driving sleeve, 42. cover plate, 43. connecting port, 44. driving piston, 45. first return spring, 5. sealing structure, 51. fixing rod, 52. connecting block, 53. second indicator plate, 54. sliding sleeve, 55. first sealing plug, 56. second return spring, 57. sliding rod, 6. driving structure, 61. driving rod, 62. hand wheel, 63. transmission piston, 7. cleaning structure, 71. second sealing plug, 72. guide groove, 73. guide hole, 74. sealing block, 75. transmission block. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figure 1-Figure 7 As shown, a TDD spray valve described in the present invention includes a nozzle 1, a spray structure 2, a supporting structure 3, a pneumatic structure 4, a sealing structure 5, a driving structure 6 and a cleaning structure 7; the spray structure 2 used for connecting the reactor and the water pipe is provided with the nozzle 1 for multi-angle spraying, and the nozzle 1 and the spray structure 2 are slidingly connected; the spray structure 2 is provided with the supporting structure 3, and the end of the supporting structure 3 is fixed to the pneumatic structure 4; the spray structure 2 is connected to the pneumatic structure 4 for pneumatic drive, and the driving structure 6 is provided at one end of the pneumatic structure 4 away from the supporting structure 3, and the driving structure 6 is provided with the sealing structure 5 for controlling the sealing of the pneumatic structure 4; the spray structure 2 is provided with the cleaning structure 7 for flushing the nozzle 1.

[0027] Specifically, the spray structure 2 includes a valve stem 21, a valve seat 22, a transmission rod 23, a connecting pipe 24, a piston rod 25, a connecting rod 26 and a through hole 27. The spray head 1 is fixed to the piston rod 25. The piston rod 25 is slidably connected to the valve stem 21. The spray head 1 is slidably connected to the valve stem 21. The valve seat 22 is provided at one end of the valve stem 21 away from the spray head 1. The connecting rod 26 is provided at one end of the piston rod 25 away from the spray head 1. The transmission rod 23 is provided at one end of the connecting rod 26 away from the piston rod 25. The transmission rod 23 is slidably connected to the valve seat 22. The piston rod 25 and its connecting rod 26 are both The hollow cylindrical structure, the connecting rod 26 is provided with two through holes 27, the through holes 27 are communicated with the internal accommodating cavity of the connecting rod 26, the connecting pipe 24 for fixing the water pipe is fixed on the valve stem 21, the connecting pipe 24 is communicated with the through hole 27; the spray structure 2 for connecting the reactor and the water pipe is provided with the spray head 1 for multi-angle spraying, and the spray head 1 is slidably connected with the spray structure 2, so that the height of the spray head 1 inside the reactor is controlled by the spray structure 2, so as to make the cleaning effect of the reactor better, that is: when cleaning the reactor, the water valve at the end of the connecting pipe 24 is opened, and at the same time the transmission The rod 23 slides between the valve seat 22, and the transmission rod 23 drives the connecting rod 26 to slide between the valve stem 21, so that the connecting rod 26 drives the piston rod 25 to slide between the valve stem 21, so that the nozzle 1 slides out of the valve stem 21, and the hot water enters the connecting rod 26 from the through hole 27 through the connecting pipe 24, and then enters the interior of the nozzle 1 from the connecting rod 26 through the piston rod 25. A plurality of spray slots are arranged on the nozzle, which can ensure 360-degree spraying without dead angles, and can also spray and flush 15 degrees up and down. The spray slot is narrow inside and wide outside, so that the nozzle 1 is not easy to break. The hot water passes through the nozzle 1 to spray 360 degrees without dead angles and spray 15 degrees up and down. The interior of the reactor is flushed, thereby making the flushing more efficient and more stable. At the same time, the piston rod 25, the connecting rod 26 and the transmission rod 23 are connected in three sections, and the dimensions with high processing precision are concentrated on the piston rod 25 and the transmission rod 23, simplifying the middle section processing, and can also be changed quickly and at low cost. After use, the transmission rod 23 slides away from the valve seat 22, so that the transmission rod 23 drives the connecting rod 26, and the connecting rod 26 drives the piston rod 25, so that the piston rod 25 drives the nozzle 1 to be stored in the interior of the valve stem 21, thereby avoiding damage to the nozzle 1 during the PVC resin processing process, making the operation more flexible and convenient.

[0028] Specifically, the cleaning structure 7 includes a second sealing plug 71, a guide groove 72, a guide hole 73, a sealing block 74 and a transmission block 75. The end of the valve stem 21 facing the nozzle 1 is provided with a circular guide groove 72, one end of the guide hole 73 passes through the valve stem 21 and is communicated with the guide groove 72, and the other end of the guide hole 73 is communicated with the accommodating cavity between the connecting rod 26 and the valve seat 22. A plurality of accommodating cavities communicated with the guide groove 72 are provided in a circumferential array on the valve stem 21, and a plurality of second sealing plugs 71 are provided in a circumferential array on the nozzle 1. The cross section of the second sealing plug 71 along the axial direction of the valve stem 21 is trapezoidal. The cross section of the second sealing plug 71 along the direction perpendicular to the axis of the valve stem 21 is semicircular, the transmission block 75 with an L-shaped cross section is fixed to the connecting rod 26, and the sealing block 74 is fixed to the transmission block 75; the spray structure 2 is provided with the cleaning structure 7 for flushing the spray head 1, and the spray structure 2 is connected with the cleaning structure 7, so that when the spray head 1 is stored, the spray head 1 can be cleaned by the cleaning structure 7, which effectively prevents waste from adhering to the spray head 1, making the connection between the spray head 1 and the spray structure 2 tighter, and at the same time reducing the water pressure between the spray head 1 and the spray structure 2 when the spray head 1 is stored;That is, when the nozzle 1 slowly slides out of the valve stem 21, hot water enters the connecting rod 26 from the through hole 27 through the connecting pipe 24, and then enters the interior of the nozzle 1 from the connecting rod 26 through the piston rod 25. The nozzle is provided with a plurality of spray slots, which can ensure 360-degree spraying without dead angles, and can also spray and flush 15 degrees up and down. At the same time, the water flow between the connecting rod 26 and the valve seat 22 passes through the guide hole 73 and then enters the interior of the guide slot 72, and then sprays on the nozzle 1 from the accommodating cavity between the valve stem 21 and the nozzle 1, thereby reducing the impact force of the nozzle 1 on the valve stem 21, and at the same time, it is convenient to flush the nozzle 1, and effectively prevent PVC resin from adhering to the nozzle 1. When the nozzle 1 completely slides out of the valve stem 21, the transmission block 75 drives the sealing block 74 to seal the guide hole 73, so that the water flow is completely sprayed from the nozzle 1. Clean the reactor. After use, the transmission rod 23 drives the connecting rod 26, and the connecting rod 26 drives the transmission block 75, so that the sealing block 74 on the transmission block 75 does not seal the diversion hole 73, so that the water flows through the diversion hole 73, and then passes through the diversion groove 72 to be completely sprayed on the nozzle 1 from the end of the valve stem 21, thereby effectively preventing the waste from adhering to the nozzle 1 when the nozzle 1 is stored, thereby making the use effect of the nozzle 1 better. At the same time, the cross-section of the second sealing plug 71 along the axial direction of the valve stem 21 is trapezoidal, and the cross-section of the second sealing plug 71 along the axial direction perpendicular to the valve stem 21 is semicircular, thereby facilitating the guidance of the nozzle 1, making the sealing between the nozzle 1 and the valve stem 21 better, and effectively preventing the PVC resin from entering the gap between the nozzle 1 and the valve stem 21 when the reactor is used. ;

[0029] Specifically, the pneumatic structure 4 includes a driving sleeve 41, a cover plate 42, a connecting port 43, a driving piston 44 and a first return spring 45. The transmission rod 23 is slidably connected to the driving sleeve 41. The driving piston 44 is fixed to the end of the transmission rod 23. The driving piston 44 is slidably connected to the driving sleeve 41. The transmission rod 23 passes through the first return spring 45. The two ends of the first return spring 45 respectively abut against the driving piston 44 and the driving sleeve 41. The connecting port 43 passes through the driving sleeve 41. The cover plate 42 and the driving sleeve 41 are detachably connected.

[0030] Specifically, the support structure 3 includes a reinforcement rod 31, two fixed rings 32 and a first indicator plate 33. The two fixed rings 32 are respectively fixed to the valve seat 22 and the drive sleeve 41. The transmission rod 23 is slidably connected to the fixed ring 32. A plurality of reinforcement rods 31 are arranged between the two fixed rings 32. The first indicator plate 33 is fixed to the transmission rod 23. The first indicator plate 33 is slidably connected to one of the reinforcement rods 31.

[0031] Specifically, the driving structure 6 includes a driving rod 61, a handwheel 62 and a transmission piston 63. The transmission piston 63 is slidingly connected to the driving sleeve 41, the connecting port 43 is connected to the accommodating cavity surrounded by the driving piston 44 and the transmission piston 63, the driving rod 61 is rotationally connected to the cover plate 42, the driving rod 61 and the transmission piston 63 are threadedly connected, and the handwheel 62 is fixed to the driving rod 61.

[0032] Specifically, the sealing structure 5 includes a fixed rod 51, a connecting block 52, a second indicating plate 53, a sliding sleeve 54, a first sealing plug 55, a second return spring 56 and a sliding rod 57. One end of the fixed rod 51 is fixed to the cover plate 42, and the other end of the fixed rod 51 is fixed to the connecting block 52. The driving rod 61 is rotatably connected to the connecting block 52. The sliding rod 57 is fixed to one end of the connecting block 52 away from the fixed rod 51. The sliding sleeve 54 is slidably connected to the sliding rod 57. The second return spring 56 is arranged between the sliding sleeve 54 and the sliding rod 57. The sliding sleeve 54 is provided with the second indicating plate 53. The second indicating plate 53 is slidably connected to the driving rod 61. The end of the sliding sleeve 54 is provided with the first truncated cone-shaped sealing plug 55, and the first sealing plug 55 is in conflict with the transmission piston 63. The support structure 3 is arranged on the spray structure 2, and the end of the support structure 3 is fixed to the pneumatic structure 4.The spray structure 2 is connected to the pneumatic structure 4 for pneumatic drive, and the driving structure 6 is provided at one end of the pneumatic structure 4 away from the supporting structure 3, and the sealing structure 5 for controlling the sealing of the pneumatic structure 4 is provided on the driving structure 6, so as to facilitate the adjustment of the position of the nozzle 1 by driving the spray structure 2 through the pneumatic structure 4, and facilitate the driving of the pneumatic structure 4 through the driving structure 6, and manually drive the spray structure 2 through the driving structure 6, and the setting of the sealing structure 5 provided on the driving structure 6 facilitates the alternating use of the driving structure 6 and the pneumatic structure 4, so as to make the operation more convenient and flexible, that is: when using the pneumatic structure When the mechanism 4 is driven, the hand wheel 62 is held by hand, and the driving rod 61 is driven by the hand wheel 62 to rotate, so that the driving rod 61 and the connecting block 52 and the cover plate 42 thereof rotate, and the fixing rod 51 cooperates with the setting of the connecting block 52, so that the driving of the driving rod 61 is more stable, and the driving rod 61 thread drives the transmission piston 63 to slide toward the driving sleeve 41, so that the transmission piston 63 contacts the first sealing plug 55, so that the first sealing plug 55 contacts the sliding sleeve 54 and the sliding connection between the end cover 42, and the sliding sleeve 54 slides with the sliding rod 57, so that the second return spring 56 is compressed, so that the The second indicator plate 53 slides on the driving rod 61, so that the position of the transmission piston 63 can be intuitively reflected through the second indicator plate 53. The first sealing plug 55 abuts against the transmission piston 63 to seal the transmission piston 63. When the first sealing plug 55 and the transmission piston 63 are not completely sealed, when the connecting port 43 is connected to the airflow, the airflow abuts against the first sealing plug 55, so that the gas is discharged from the transmission piston 63, so as to effectively prevent the pressure between the driving piston 44 and the transmission piston 63 from being too high when the transmission piston 63 is not reset, causing the pressure between the cover plate 42 and the driving sleeve 41 to be too high and damaged. When the end of the connecting port 43 is When the solenoid valve at the port is powered on, the gas drives the driving piston 44 to slide with the driving sleeve 41, so that the driving piston 44 drives the transmission rod 23 to slide with the driving sleeve 41, and the first indicator plate 33 on the transmission rod 23 slides with the reinforcement rod 31, so that the position of the transmission rod 23 can be intuitively reflected by the first indicator plate 33. When the driving piston 44 or the connecting port 43 is damaged, the hand wheel 62 is turned to drive the driving rod 61 through the hand wheel 62, so that the driving rod 61 drives the transmission piston 63 to contact the driving piston 44, so that the driving piston 44 is compressed by contacting the first return spring 45. ;

[0033] When in use, when cleaning the reactor, open the water valve at the end of the connecting pipe 24. When the pneumatic structure 4 is used for driving, the hand wheel 62 is held by hand, and the driving rod 61 is driven by the hand wheel 62 to rotate the driving rod 61, so that the driving rod 61 and the connecting block 52 and its cover plate 42 rotate. The fixing rod 51 cooperates with the setting of the connecting block 52, thereby making the driving of the driving rod 61 more stable. The driving rod 61 thread drives the transmission piston 63 to slide toward the driving sleeve 41, thereby making the transmission piston 63 contact the first sealing plug 55, so that the first sealing plug 55 contact the sliding sleeve 54 and the sliding connection between the end cover 42, and the sliding sleeve 54 slides with the sliding rod 57, so that the second return spring 56 is compressed, thereby making the second indicator plate 53 on the sliding sleeve 54 slide on the driving rod 61, so as to facilitate the intuitive reaction of the position of the transmission piston 63 through the second indicator plate 53. The first sealing plug 55 contacts the transmission piston 63, so that the transmission piston 63 is sealed. When the first sealing plug 55 and the transmission piston When 63 is not completely sealed, when the connection port 43 is connected to the airflow, the airflow hits the first sealing plug 55, so that the gas is discharged from the transmission piston 63, thereby effectively preventing the transmission piston 63 from being reset due to excessive pressure between the driving piston 44 and the driving piston 63, which causes the cover plate 42 and the driving sleeve 41 to be damaged due to excessive pressure. When the solenoid valve at the port of the connection port 43 is powered on, the gas drives the driving piston 44 to slide with the driving sleeve 41, so that the driving piston 44 drives the driving rod 23 to slide with the driving sleeve 41, and the first indicator plate 33 on the driving rod 23 slides with the reinforcement rod 31, so that the position of the driving rod 23 is intuitively reflected by the first indicator plate 33. When the driving piston 44 or the connection port 43 is damaged, the hand wheel 62 is turned, and the driving rod 61 is driven by the hand wheel 62, so that the driving rod 61 thread drives the transmission piston 63 to hit the driving piston 44, so that the driving piston 44 hits the first reset spring 45 for compression;At the same time, the transmission rod 23 slides with the valve seat 22, and the transmission rod 23 drives the connecting rod 26 to slide with the valve stem 21, so that the connecting rod 26 drives the piston rod 25 to slide with the valve stem 21, so that the nozzle 1 slides out of the valve stem 21, and the hot water enters the connecting rod 26 from the through hole 27 through the connecting pipe 24, and then enters the interior of the nozzle 1 from the connecting rod 26 through the piston rod 25. A plurality of spray slots are arranged on the nozzle, which can ensure 360-degree spraying without dead angles, and can also spray and flush 15 degrees up and down. The spray slot is narrow inside and wide outside, so that the nozzle 1 is not easy to break. The hot water passes through the nozzle 1 to spray 360 degrees without dead angles and spray 15 degrees up and down to flush the interior of the reactor, thereby making the flushing efficiency higher and more stable. At the same time, the piston rod 25, The connecting rod 26 and its transmission rod 23 are connected in three sections, and the dimensions with high processing precision are concentrated on the piston rod 25 and the transmission rod 23, which simplifies the processing of the middle section and can also be changed quickly and at low cost. When the use is over, the transmission rod 23 slides away from the valve seat 22, so that the transmission rod 23 drives the connecting rod 26, and the connecting rod 26 drives the piston rod 25, so that the piston rod 25 drives the nozzle 1 to be stored inside the valve stem 21, thereby avoiding damage to the nozzle 1 during the processing of the PVC resin, making the operation more flexible and convenient; when the nozzle 1 slowly slides out of the valve stem 21, the hot water enters the connecting rod 26 from the through hole 27 through the connecting pipe 24, and then enters the interior of the nozzle 1 from the connecting rod 26 through the piston rod 25, and the nozzle There are multiple spraying grooves on it, which can ensure 360-degree spraying without dead angles, and can also spray and flush 15 degrees up and down. At the same time, the water flow between the connecting rod 26 and the valve seat 22 passes through the guide hole 73 and then enters the inside of the guide groove 72, and then sprays on the nozzle 1 from the accommodating cavity between the valve stem 21 and the nozzle 1, thereby reducing the impact force of the nozzle 1 on the valve stem 21, and at the same time, it is convenient to flush the nozzle 1, effectively preventing the PVC resin from adhering to the nozzle 1. When the nozzle 1 completely slides out of the valve stem 21, the transmission block 75 drives the sealing block 74 to seal the guide hole 73, so that the water flow is completely sprayed from the nozzle 1 to clean the reactor. When the use is over, the transmission rod 23 drives the connecting rod 26, and the connecting rod 2 6 drives the transmission block 75, so that the sealing block 74 on the transmission block 75 does not seal the guide hole 73, so that the water flows through the guide hole 73, and then passes through the guide groove 72 to be completely sprayed on the nozzle 1 from the end of the valve stem 21, thereby effectively preventing the waste from adhering to the nozzle 1 when the nozzle 1 is stored, thereby making the use effect of the nozzle 1 better. At the same time, the cross section of the second sealing plug 71 along the axial direction of the valve stem 21 is trapezoidal, and the cross section of the second sealing plug 71 along the axial direction perpendicular to the valve stem 21 is semicircular, thereby facilitating the guidance of the nozzle 1, making the sealing between the nozzle 1 and the valve stem 21 better, and effectively preventing the PVC resin from entering the gap between the nozzle 1 and the valve stem 21 when the reactor is used. ;

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A TDD spray valve, characterized in that: The invention comprises a spray head (1), a spray structure (2), a support structure (3), a pneumatic structure (4), a sealing structure (5), a driving structure (6) and a cleaning structure (7); the spray structure (2) used for connecting the reaction kettle and the water pipe is provided with the spray head (1) used for multi-angle spraying, and the spray head (1) and the spray structure (2) are slidably connected; the spray structure (2) is provided with the support structure (3), and the end of the support structure (3) is fixed to the pneumatic structure (4); the spray structure (2) is connected to the pneumatic structure (4) used for pneumatic drive, and the pneumatic structure (4) is back-moved. The driving structure (6) is provided at one end away from the supporting structure (3), and the driving structure (6) is provided with the sealing structure (5) for controlling the sealing performance of the pneumatic structure (4), so as to facilitate the alternate use of the driving structure (6) and the pneumatic structure (4); the spray structure (2) is provided with the cleaning structure (7) for flushing the spray head (1), and the spray structure (2) comprises a valve stem (21), a valve seat (22), a transmission rod (23), a connecting pipe (24), a piston rod (25), a connecting rod (26) and a through hole (27); the spray head (1) is fixed to the piston rod (25), and the The piston rod (25) is slidably connected to the valve stem (21), the nozzle (1) is slidably connected to the valve stem (21), the valve seat (22) is provided at one end of the valve stem (21) facing away from the nozzle (1), the connecting rod (26) is provided at one end of the piston rod (25) facing away from the nozzle (1), the transmission rod (23) is provided at one end of the connecting rod (26) facing away from the piston rod (25), the transmission rod (23) is slidably connected to the valve seat (22), and the pneumatic structure (4) comprises a drive sleeve (41), a cover plate (42), a connection port (43), a drive piston (44) and a first return spring (45), the transmission rod (23) and the drive sleeve (41) are slidably connected, the end of the transmission rod (23) is fixed with the drive piston (44), the drive piston (44) and the drive sleeve (41) are slidably connected, the transmission rod (23) passes through the first return spring (45), the two ends of the first return spring (45) respectively abut against the drive piston (44) and the drive sleeve (41), the connection port (43) passes through the drive sleeve (41), and the cover plate (42) and the drive sleeve (41) are detachably connected.

2. A TDD spray valve according to claim 1, characterized in that: The piston rod (25) and its connecting rod (26) are both hollow cylindrical structures. The connecting rod (26) is provided with two through holes (27), and the through holes (27) are in communication with the internal accommodating cavity of the connecting rod (26). The connecting pipe (24) for fixing the water pipe is fixed on the valve stem (21), and the connecting pipe (24) is in communication with the through holes (27).

3. A TDD spray valve according to claim 1, characterized in that: The support structure (3) comprises a reinforcement rod (31), two fixing rings (32) and a first indicator plate (33); the two fixing rings (32) are respectively fixed to the valve seat (22) and the drive sleeve (41); the transmission rod (23) is slidably connected to the fixing ring (32); a plurality of reinforcement rods (31) are provided between the two fixing rings (32); the first indicator plate (33) is fixed to the transmission rod (23); and the first indicator plate (33) is slidably connected to one of the reinforcement rods (31).

4. A TDD spray valve according to claim 1, characterized in that: The driving structure (6) comprises a driving rod (61), a hand wheel (62) and a transmission piston (63); the transmission piston (63) is slidably connected to the driving sleeve (41); the connecting port (43) is connected to a receiving cavity formed between the driving piston (44) and the transmission piston (63); the driving rod (61) is rotationally connected to the cover plate (42); the driving rod (61) and the transmission piston (63) are threadedly connected; and the hand wheel (62) is fixed to the driving rod (61).

5. A TDD spray valve according to claim 1, characterized in that: The sealing structure (5) comprises a fixing rod (51), a connecting block (52), a second indicating plate (53), a sliding sleeve (54), a first sealing plug (55), a second return spring (56) and a sliding rod (57), one end of the fixing rod (51) is fixed to the cover plate (42), the other end of the fixing rod (51) is fixed to the connecting block (52), a driving rod (61) is rotationally connected to the connecting block (52), and the sliding rod (57) is fixed to the connecting block (52) away from the fixing rod. At one end of the fixed rod (51), the sliding sleeve (54) is slidably connected to the sliding rod (57), a second return spring (56) is provided between the sliding sleeve (54) and the sliding rod (57), a second indicator plate (53) is provided on the sliding sleeve (54), the second indicator plate (53) is slidably connected to the driving rod (61), and a truncated cone-shaped first sealing plug (55) is provided at the end of the sliding sleeve (54), and the first sealing plug (55) is in contact with the transmission piston (63).

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