CN116440804B - 3-Trifluoromethyl-4-nitrophenol hydrolysis system - Google Patents
3-Trifluoromethyl-4-nitrophenol hydrolysis system Download PDFInfo
- Publication number
- CN116440804B CN116440804B CN202310488575.1A CN202310488575A CN116440804B CN 116440804 B CN116440804 B CN 116440804B CN 202310488575 A CN202310488575 A CN 202310488575A CN 116440804 B CN116440804 B CN 116440804B
- Authority
- CN
- China
- Prior art keywords
- ball
- rack
- ball seat
- gear
- nitrophenol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- ZEFMBAFMCSYJOO-UHFFFAOYSA-N 4-nitro-3-(trifluoromethyl)phenol Chemical compound OC1=CC=C([N+]([O-])=O)C(C(F)(F)F)=C1 ZEFMBAFMCSYJOO-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 26
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 29
- 230000007246 mechanism Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 11
- 239000002390 adhesive tape Substances 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 229920001971 elastomer Polymers 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/04—Pressure vessels, e.g. autoclaves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/002—Component parts of these vessels not mentioned in B01J3/004, B01J3/006, B01J3/02 - B01J3/08; Measures taken in conjunction with the process to be carried out, e.g. safety measures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/02—Feed or outlet devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to the technical field of chemical industry, in particular to a 3-trifluoromethyl-4-nitrophenol hydrolysis system, which comprises the following components: the device comprises a diaphragm pump and a pressure kettle, wherein a pipeline is fixedly arranged on the pressure kettle, and the diaphragm pump is fixedly connected with the pipeline. According to the invention, the rotating shaft is arranged on the ball, the ball orderly rotates when moving up and down by utilizing the cooperation of the gear and the rack I on the rotating shaft, and the toothless area is arranged on the rack I, so that the gear is matched with the rack II after moving down to the toothless area, the rotating angle of the ball when moving up is larger than the rotating angle when moving down, each surface on the ball is in circular contact with the ball seat, the surface of the ball is fully utilized, the service life of the ball is prolonged, the phenomenon that the specific gravity of the raw material is not expected when the diaphragm pump is used for introducing the raw material is avoided, and the hydrolysis efficiency and effect of the 3-trifluoromethyl-4-nitrophenol are ensured.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a 3-trifluoromethyl-4-nitrophenol hydrolysis system.
Background
The product of 3-trifluoromethyl-4-nitrophenol after hydrolysis is an important chemical raw material, and the hydrolysis process is as follows: 3-trifluoromethyl-4-nitrophenol is put into a pressure kettle by a diaphragm pump, caustic soda and deep well water are sequentially put into the pressure kettle, the pressure is increased, the temperature is increased, materials react in the kettle, the step is called feeding reaction, and finally, the materials are returned to a 5000L enamel kettle by air pressure for suction filtration after being qualified in reaction.
When the diaphragm pump continuously works, the ball and the end surface of the ball seat are worn in repeated friction, so that gaps are formed between the ball and the ball seat, the pneumatic diaphragm pump quantity is reduced, and the ball wear is influenced by factors such as the manufacturing process and the outer film environment corrosion during long-term working.
In addition, in the process of continuous collision of the ball and the ball seat, the ball rotates under the scouring of materials, so that the collision surface of the ball and the ball seat is random, the height of the ball seat is limited, the rotation angle of the ball in the up-and-down motion process is limited, the contact surface of the ball in contact with the ball seat is limited, the effective use area of the ball is less than 50% when the ball is damaged, even if the height of the ball seat is increased, the whole surface of the ball is in contact with the ball seat, the contact surface of the ball and the ball seat is random finally, the unstable factor still exists, the service life of the ball is lower and unstable, and when the ball or the ball seat is worn, the specific gravity of the raw materials imported by the diaphragm pump is lower than expected when the 3-trifluoromethyl-4-nitrophenol is hydrolyzed, the hydrolysis effect of the 3-trifluoromethyl-4-nitrophenol is affected, and the cost of the hydrolysis procedure of the 3-trifluoromethyl-4-nitrophenol is increased.
Therefore, the 3-trifluoromethyl-4-nitrophenol hydrolysis system is provided, and the contact surface of the ball and the ball seat is orderly controlled, so that the surface of the ball is effectively utilized, and the service life and stability of the ball are further prolonged.
Disclosure of Invention
The invention aims to provide a 3-trifluoromethyl-4-nitrophenol hydrolysis system, which enables spheres to orderly rotate through a driving unit, makes the rotated angles of the spheres different when the spheres move upwards and downwards by utilizing a spacing mechanism, enables the contact surface of each sphere and the ball seat to continuously circulate each time, enables each surface on the spheres to circularly contact with the ball seat, fully utilizes the surfaces of the spheres, prolongs the service life of the spheres, avoids the situation that the specific gravity of raw materials is not as good as expected when a diaphragm pump is used for introducing raw materials, ensures the hydrolysis efficiency and effect of 3-trifluoromethyl-4-nitrophenol, and solves the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A 3-trifluoromethyl-4-nitrophenol hydrolysis system comprising:
The diaphragm pump, autoclave, fixed mounting has the pipeline on the autoclave, diaphragm pump and pipeline fixed connection, the diaphragm pump includes, the pump body, drive mechanism, the stand, the diaphragm, the both sides fixed mounting of the pump body has two stands, the equal fixed mounting in upper and lower both ends of stand has the check valve, fixed mounting has two diaphragms in the pump body, drive mechanism passes through inwards or outwards tensioning diaphragm transmission material, the check valve includes ball and ball seat.
Preferably, the ball is last fixed mounting has the pivot, the spout that is used for holding the pivot has been seted up to the both sides of ball seat, the surface symmetry fixed mounting of ball seat has the shell, the both ends of pivot are located the shell, be equipped with the drive unit who is used for rotating the pivot in the shell, drive unit utilizes the material to the ascending thrust of ball or the diaphragm to the suction drive pivot rotation of ball when inwards or outwards tensioning for the ball, the orderly rotation of ball in the ball seat, and the rotation angle when the ball upwards moves is different with the rotation angle when moving down, and then makes the ball all different with the contact surface of ball seat at every turn, and the ball has all rotated the settlement angle forward or backward before contacting with the ball seat.
The diaphragm pump pushes the diaphragm piston to move through the transmission mechanism, the suction and the discharge of materials are completed by utilizing the inward or outward tensioning of the diaphragm, the transmission of the materials is realized, when the transmission mechanism tightens the left diaphragm inwards, the air pressure can deform the diaphragm to be outwards sunken, the chamber volume of the diaphragm pump is gradually increased, the pressure is correspondingly reduced, at the moment, the upper ball of the left upright post is contacted with the ball seat, the lower ball is separated from the ball seat, the materials enter the chamber, the suction action is completed, the diaphragm of the other upright post is completed, and the materials are continuously guided into the pressure kettle in a circulating way.
The two ends of the ball are welded with rotating shafts, in the rising or falling process of the ball, the driving unit controls the rotating shafts to rotate, the rotating angle of the ball in rising is larger than that of the ball in falling, the contact surface of the ball and the ball seat is different each time, and the ball is orderly rotated forwards or backwards for a set angle before contacting the ball seat each time.
Preferably, the driving unit comprises a first rack fixedly installed on the inner wall of the shell, gears meshed with the first rack are fixedly installed at the end parts of two ends of the rotating shaft, and a spacing mechanism is arranged in the shell, so that the rotation angle of the gears is unequal to the rotation angle of the gears when the ball moves upwards and the rotation angle of the gears when the ball moves downwards.
The gear is installed at the both ends of pivot, when the ball rises or descends, the pivot is in the spout removal, epaxial gear and rack intermeshing for the pivot rotates, and then makes the ball in the ball seat rotate, whenever the diaphragm discharges the material, the ball upwards moves the distance of setting and clockwise rotation angle of setting, and when the diaphragm inhales the material, at ball decline and anticlockwise motion's in-process, the spacing mechanism has reduced ball anticlockwise rotation angle, when making ball and ball seat contact, rotation has taken place for the ball seat, and this rotation angle equals the angle that spacing mechanism reduced at ball decline in-process. That is, the ball rotates clockwise by a set angle before contacting with the ball seat each time, so that each surface on the ball is in circular contact with the ball seat, the surface of the ball is fully utilized, and the service life of the ball is prolonged.
And because the circulation of the surface of the ball contacts with the ball seat, when the surface of the ball is damaged, the strength on the rest surface also reaches the limit, and the replaced ball is not necessary to repair at the moment, so that a new ball can be directly replaced.
The water outlet pressure of the diaphragm pump is 10MPa, the diameter of the ball is 6cm, the surface area is 113cm 2, the material washed on the left side of the ball is about 1% -5% greater than that on the right side, or conversely, the force on one side of the ball is calculated according to that the thrust on the material on one side of the ball is 5% greater than that on the other side of the ballHere, F is the uniform load.
Therefore, the rotating shaft and the gear are made of common stainless steel materials, and the strength can be completely met.
Similarly, there are many structures for rotating the ball during the ball making process, such as a micro motor directly arranged at the end of the rotating shaft, and then the distance sensor is used to control the rotation of the motor, so that the ball automatically rotates by a set angle after approaching the ball seat each time. The precision and stability of the rotation are higher.
The reason for using the rack and pinion to drive the ball to rotate is that firstly, the advantage of this scheme lies in adopting pure mechanical structure, and simple structure, when facing the problem that the material invaded in the shell, only need the electroplating protective layer on the component can, life is longer, and low in manufacturing cost. While the electrical equipment needs to be well sealed when facing the invasion of materials so as to ensure the service life,
Secondly, most miniature motors are not provided with a reduction gear, when the diaphragm pump discharges materials, the ball is positioned at the top of the ball seat and is flushed by the materials, at the moment, the ball easily breaks through the resistance of the motor to rotate in situ, and when the ball descends to be in contact with the ball seat, the contact surface of the last time cannot be ensured not to be in contact with the ball seat in a short time. It is necessary to purchase a miniature motor with a reduction gear and there are four balls in the diaphragm pump, meaning that the cost will be four times higher, making the manufacturing cost of the motor high. The scheme has the advantages that the gear is matched with the rack, when the ball does not vertically displace, the ball has a natural self-locking effect, a braking device is not required to be additionally arranged, and the manufacturing cost is further reduced.
Preferably, the spacing mechanism comprises a rack II fixedly installed on the inner wall of the shell, the rack II and the rack I are oppositely arranged, a section of toothless area is arranged on the rack I, movable teeth are arranged on the rack II only in the same height area corresponding to the toothless area of the rack, when the gear is meshed with the movable teeth on the rack II, the gear is positioned in the toothless area on the rack I, a rubber strip I is arranged on the side wall corresponding to the toothless area in the sliding groove, a through groove is formed in the rack II, a sliding block is arranged in the through groove, the sliding block is fixedly connected with the movable teeth, oblique blocks are fixedly installed on two sides of the sliding block, a fixed cylinder is fixedly installed on the shell, a spring is fixedly installed in the fixed cylinder, two pushing plates matched with the oblique blocks are installed at the end parts of the rotating shaft, a sealing ring is arranged on the sliding block, and the first sliding block and the second sliding block are part of the shell.
Preferably, the toothless area on the first rack is positioned at the middle part of the first rack.
Further, the movable teeth are positioned in the middle part corresponding to the toothless zone.
The first rack and the second rack are arranged oppositely, a section of toothless area with a tooth width of 4 is arranged in the middle of the first rack, a movable tooth is arranged in the middle of the second rack, corresponding to the toothless area of the second rack, and can be meshed with the gear, the movable tooth can pass through the sliding block to enter and exit in the through groove, and the sealing ring between the sliding block and the through groove plays a damping role on the sliding block except that materials are placed inside and outside the fixed cylinder, so that the movable tooth cannot pop up immediately.
When the diaphragm pump discharges materials, the ball drives the rotating shaft and the push plate to move upwards, the gear is meshed with the first rack, the gear and the ball rotate clockwise, before the gear moves to the toothless area of the first gear, the push plate is contacted with the inclined blocks on two sides of the movable teeth, the movable teeth are pressed into the through groove, when the gear moves to the toothless area of the first rack, the push plate is separated from the inclined blocks, but the movable teeth cannot pop up immediately under the action of the sealing ring, at the moment, the rotating shaft moves to the first rubber strip in the middle of the sliding groove, the gear is not meshed with the first rack nor meshed with the second rack, the rotating shaft only moves upwards under the compression of the first rubber strip, even if the ball is impacted by the materials, the ball does not rotate until the gear moves out of the toothless area to be meshed with the first rack again, and the ball moves to the top of the ball seat.
When the diaphragm pump sucks materials, the ball moves downwards, the gear is meshed with the first rack, so that the ball rotates anticlockwise, the movable teeth are ejected from the through grooves before the gear moves to the toothless area of the first rack, when the gear moves to the toothless area of the first rack, the gear is meshed with the movable teeth firstly when the ball moves downwards due to the T-shaped push plate, the gear rotates clockwise by a specified angle, the clockwise rotated angle is larger than the anticlockwise rotated angle before the ball contacts with the bottom of the ball seat, namely the ball rotates clockwise by a set angle relative to the ball seat, the angle can be determined by controlling the tooth number of the gear, and the specific rotation angle can be correspondingly adjusted according to the size and the material of the ball.
It is worth to say that, because the suction force of the cavity to the ball is mostly resultant force in the vertical direction, even if the rotating shaft is located between the rubber strips, the suction force makes the torque of the movable teeth meshed with the gears larger than the resistance of the rubber strips.
The movable teeth and the toothless areas on the first rack are correspondingly arranged, the toothless areas are arranged in the middle of the first rack, the collision force between the movable teeth and the gears, which is borne by the inclined blocks at a single time, can be effectively reduced, the nearer the movable teeth are to the bottom of the second rack, the larger the inertial force and the attractive force are when the movable teeth are borne by the balls, and in order to ensure that the gears are not blocked by the suddenly ejected movable teeth on two sides, the movable teeth must be delayed to be ejected, so that the movable teeth cannot be arranged at the top of the second rack, and the inclined blocks collide with the movable teeth in the rising or falling process of the balls, if the movable teeth are arranged at the top or the bottom of the second rack, the upper sides and the lower sides of the inclined blocks are stressed unevenly, and therefore the inclined blocks and the movable teeth are arranged in the middle of the second rack. And the movable teeth are arranged in the middle part corresponding to the toothless zone, so that the gear does not collide with the gear on the first rack when being meshed with the movable teeth.
In addition, as an implementation mode of the invention, a sealing tube is fixedly arranged on the outer wall of the second rack, the movable teeth are slidably arranged in the bottom of the sealing tube, a movable block is slidably arranged at the top of the sealing tube, and a rotary locking structure matched with the movable block is fixedly arranged at the top of the sealing tube.
When the movable block is positioned outside the sealing tube, the movable teeth are positioned in the sealing tube, the movable teeth are not contacted with the gear when the ball moves upwards, the movable block is contacted with the movable block exposed outside the sealing tube after the ball moves to the top of the ball seat, the movable block is pressed into the sealing tube and is locked by the clamping block, the movable teeth are ejected out at the moment, the movable teeth are meshed with the gear when the ball moves downwards, the gear rotates clockwise by a certain angle, and the ball rotates clockwise relative to the ball seat when the ball contacts the ball seat. When the ball moves upwards again, the gear is contacted with the movable teeth, after moving to the top of the ball seat, the gear is contacted with the movable block, the movable block and the clamping block are unlocked, the movable teeth are sucked into the sealing tube, when the ball descends, the gear is not contacted with the movable teeth, after the ball contacts the ball seat, the ball rotates anticlockwise relative to the ball seat, and the rotating amplitude is equal to the last rotating amplitude. The ball seat is characterized in that the ball seat is provided with two contact surfaces, the two contact surfaces are in circular contact with the ball seat, the strength of the two contact surfaces contacted with the ball seat is correspondingly enhanced, the strength of the other surfaces is reduced, and the service life of the ball is relatively prolonged.
It should be noted that when the diaphragm is sucking material, because the ball separates cavity and ball seat, so the pressure in the ball seat is unchangeable, and when the diaphragm is discharging material, because ball seat and row material pipe intercommunication, it is lower to the ejecting and the withdrawal of movable tooth influence.
Preferably, when the ball contacts with the ball seat, the distance between the center of the ball and the center of the contact surface is equal to the diameter of the rotating shaft.
The surface of the ball is utilized as far as possible, the area on the spherical surface is contacted with the ball seat, the diameter of the ball is equal to the diameter of the opening of the ball seat as far as possible, but in order to prevent the rotating shaft from colliding with the ball seat, the rotating shaft needs to have a certain safety distance from the ball seat, and the safety distance is that the distance between the center of the ball and the center of the circle of the contact surface is equal to the diameter of the rotating shaft.
Preferably, the bottom of the sliding groove is provided with a second rubber strip, and the first rack is provided with no teeth at the bottom corresponding to the second rubber strip.
The suction pressure of the diaphragm pump is large, and after the ball is attached to the ball seat, the ball cannot rotate. The ball is arranged in such a way, before the ball contacts with the ball seat, the ball is rotated relative to the ball seat, and the rotating shaft is limited to rotate by the second adhesive tape, so that the situation that the ball is attached to the ball seat without rotating due to the fact that a fit gap exists between the first gear and the first rack is avoided.
Preferably, the first rack and the second rack are provided with buffer blocks matched with the pushing plate.
The diameter of gear is less than the diameter of ball, and the height of push pedal is less than the diameter of gear, when the ball removes to the ball seat top, the top of rack one is removed to the summit of gear, and the push pedal then in advance with buffer block contact, reduce the ball rise time with the impact force of ball seat, the same reason, when the ball contacts with the ball seat downwards, reduce the impact force of ball and ball seat through the cooperation of push pedal and buffer block, improve the life of ball, and the buffer block takes place certain deformation when contacting with the push pedal, guarantee that the ball normally adsorbs in the ball seat bottom.
The ball is subjected to a vertical upward force of f=p×s=10× 6N/m2*113*10-4m2＝56*103 N.
The buffer block is a cube with a side length of 2cm, and the pressure isTwo pushing plates are arranged at two ends of the rotating shaft and are in contact with the buffer blocks, namely 8 buffer blocks bear the pressure, and each buffer block is 17.5MPa on average. Conventional rubber is selected to meet the requirement.
Preferably, the housing is disposed on the flange bottom wall of the ball seat.
Utilize ball seat and pump body coupling's flange face for the shell only needs to set up three metal sheets, just can wrap up parts such as gear, rack one, rack completely, reduces materials, saves the cost, further improves the utilization ratio of original part.
Preferably, the arc through which the ball rotates relative to the ball seat each time is equal to the beveled chamfer of the ball seat-ball contact surface.
The radian of each rotation of the ball relative to the ball seat is equal to the inclined chamfer angle of the contact surface of the ball seat and the ball, and the rotation angle is thatWherein x is the inclined chamfer angle of the contact surface of the ball seat and the ball, and y is the radius of the ball. Everywhere the surface of the sphere is maximally utilized.
It should be noted that the most accurate value of x should correspond to the chord length of the sphere cross-section corresponding to the arc length equal to the chamfer angle, but since the chamfer angle is generally smaller, the arc length may be approximately equal to the chord length.
Compared with the prior art, the invention has the beneficial effects that:
1. The rotary shaft is arranged on the ball, the acting force on the ball when the material is extracted or discharged is utilized to provide power for the driving unit, the ball rotates the rotary shaft, the angle rotated in the process of moving the ball up and down is different by the aid of the spacing mechanism, each surface on the ball is in circular contact with the ball seat, the surface of the ball is fully utilized, the service life of the ball is prolonged, and the reduction of hydrolysis effect caused by the fact that the specific gravity of the raw material is not as high as expected when the raw material is led in by the diaphragm pump is avoided.
2. Through with pivot fixed mounting in drive unit, when ball contact ball seat, reduce the impact force when drive unit removes to the terminal point through the buffer block, and then reduce the contact impact of ball and ball seat. The service life of ball is prolonged to the buffer block takes place certain deformation when contacting with the push pedal, guarantees that the ball normally adsorbs in the ball seat bottom.
3. The arc of each revolution of the ball relative to the ball seat is equal to the oblique chamfer of the contact surface of the ball seat and the ball, and each place on the surface of the ball is utilized to the greatest extent.
Drawings
FIG. 1 is a diagram of the overall structure of the present invention;
FIG. 2 is a diagram of a diaphragm pump;
FIG. 3 is an internal structural view of the housing;
FIG. 4 is an enlarged view of the structure shown at A in FIG. 2;
FIG. 5 is an exploded view of the housing internals;
FIG. 6 is an enlarged view of the structure at B in FIG. 4;
FIG. 7 is a front view of FIG. 4;
fig. 8 is a structural view of a seal tube in the third embodiment.
In the figure: 1. a pump body; 2. a column; 3. a ball seat; 4. a flange; 5. a pressure kettle; 31. a second rack; 32. a fixed cylinder; 33. a first rack; 34. a first adhesive tape; 35. a rotating shaft; 36. a push plate; 37. a gear; 38. a buffer block; 39. a second adhesive tape; 321. a spring; 322. a slide block; 323. a through groove; 324. a sloping block; 325. a movable tooth; 326. sealing the tube; 327. a push switch; 328. a movable block.
Detailed Description
The aspects and features of the present disclosure and methods of accomplishing these aspects and features will be apparent, however, and the present disclosure is not limited to the embodiments disclosed hereinafter and may be embodied in various forms. The present embodiments are provided to assist those of ordinary skill in the art in a comprehensive understanding of the present disclosure, and the present disclosure is limited only by the scope of the appended claims.
Referring to fig. 1 to 7, the present invention provides a 3-trifluoromethyl-4-nitrophenol hydrolysis system, which comprises the following technical scheme:
The two shells are symmetrically arranged on the bottom wall of the ball seat 3 through bolts, the ball seat 3 is made of die steel, the top wall of the shell extends to the flange 4 of the ball seat 3, the first rack 33 is arranged on the side wall of the shell through bolts by means of waterproof glue, 20 teeth are arranged on the first rack 33, the bolts do not penetrate through the shell to prevent materials from leaking, the middle part of the first rack 33 is a toothless area without teeth, the length of the toothless area is 4mm, the second rack 31 is also arranged on the inner wall opposite to the first rack 33 through bolts, a through groove 323 is formed in the middle part of the second rack 31, the shell and the second rack 31 are penetrated through the through groove 323, a sliding block 322 is slidably arranged on the through groove 323, 1 movable tooth 325 is arranged on the sliding block 322 through bolts, 1 inclined block 324 is also embedded on two sides of the movable tooth 325, the size of the movable tooth 325 is the same as that of the teeth on the rack, the upper bolt of the shell is provided with a fixed cylinder 32, the fixed cylinder 32 wraps all the through grooves 323, 2 springs 321 are placed in the fixed cylinder 32, the springs 321 are made of stainless steel materials, when the springs 321 are in an original state, movable teeth 325 are located outside the through grooves 323, two rotating shafts 35 are welded on the surfaces of round balls, the end parts of the rotating shafts 35 are connected with 1 cylindrical gear 37 in a key mode, a sliding groove is formed in each ball seat 3, the rotating shafts 35 move in the sliding groove, the gear 37 and a first rack 33 are meshed with each other, the diameter of the gear 37 is 2.2cm, the number of teeth on the gear 37 is 60, zinc alloy plating layers are electroplated on the gear 37, the first rack 33 and the second rack 31, 2 pushing plates 36 are rotatably installed on two sides of the rotating shafts 35, the shape of each pushing plate 36 is T-shaped, 4 fluororubbers are inlaid at the top and the top of the first rack 33 and the top of the second rack 31, and 4 rubber strips are inlaid at the middle and bottom of the sliding groove.
Before starting hydrolysis, it was checked whether the components of the starting diaphragm pump were normal, the pressure valve was adjusted to the desired pressure, the diaphragm pump was run for 1 minute, and whether the sealing portion was normal was checked.
After the inspection is correct, an air inlet pipe of the pneumatic diaphragm pump is connected into a container for containing 3-trifluoromethyl-4-nitrophenol, the pneumatic diaphragm pump is started, a transmission mechanism pushes a diaphragm to do piston motion under the pushing of gas, the inward or outward tensioning of the diaphragm is utilized to finish the suction and discharge of materials, the transmission of the materials is realized, when the transmission mechanism tightens a left diaphragm inwards, air pressure can deform the diaphragm to be sunken outwards, the chamber volume of the diaphragm pump is gradually increased, the pressure is correspondingly reduced, at the moment, an upper ball of a left upright post 2 is contacted with a ball seat 3, a lower ball is separated from the ball seat 3, the materials enter the chamber, the suction action is finished, the diaphragm of the other upright post 2 is finished to discharge, and the materials are continuously guided into a pressure kettle 5 in a circulating manner.
When the diaphragm pump discharges materials, the ball drives the rotating shaft 35 and the push plate 36 to move upwards, the gear 37 is meshed with the first rack 33, the gear 37 and the ball rotate clockwise, before the gear 37 moves to a toothless area of the first gear 37, the push plate 36 is contacted with the inclined blocks 324 on two sides of the movable teeth 325, and the movable teeth 325 are pressed into the through grooves 323, so that the gear 37 cannot be contacted with the movable teeth 325; when the gear 37 moves to the toothless area of the first rack 33, the push plate 36 is separated from the inclined block 324, but the movable tooth 325 cannot pop up immediately under the action of the sealing ring, at this time, the rotating shaft 35 moves to the first rubber strip 34 in the middle of the chute, at this time, the gear 37 is not meshed with the first rack 33 nor the second rack 31, the rotating shaft 35 can only move upwards under the compression of the first rubber strip 34, even if the ball is impacted by the material, the ball cannot rotate until the gear 37 moves out of the toothless area and is meshed with the first rack 33 again, the ball directly moves to the top of the ball seat 3, and before the ball contacts with the top of the ball seat 3, the push plate 36 contacts with the buffer block 38 in advance, so that the impact force of the ball with the ball seat 3 when rising is reduced.
When the diaphragm pump sucks material, the ball moves downwards, the gear 37 is meshed with the first rack 33, so that the ball rotates anticlockwise, the gear 37 rotates clockwise by 30 degrees when moving to the top of the ball seat 3, the movable teeth 325 are ejected from the through grooves 323 before the gear 37 moves to the toothless area of the first rack 33, and when the gear 37 moves to the toothless area of the first rack 33, the push plate 36 is in a T shape, so that when the ball moves downwards, the gear 37 is meshed with the movable teeth 325 first, so that the gear 37 rotates clockwise by 2 degrees, the clockwise rotated angle is larger than the anticlockwise rotated angle before the ball contacts with the bottom of the ball seat 3, namely, the ball rotates clockwise by 2 degrees relative to the ball seat 3, each surface on the ball is in circular contact with the ball seat 3, and the surface of the ball is fully utilized.
In the second embodiment, the ball seat 3 is worn. The pressure detection device is arranged in the diaphragm pump, when the pressure change in the cavity of the diaphragm pump is found to exceed a set value by the detection device, and after the ball contacts the bottom of the ball seat 3 again, the pressure is recovered to be normal, so that the ball is indicated to be worn, if the pressure value is always unable to be recovered to be normal, the ball seat 3 is indicated to be worn, under the normal condition, after the ball is worn, the ball rotates orderly relative to the ball seat 3, under the emergency production condition, the ball can meet the total transmission requirement of the diaphragm pump, namely, the ball can be replaced after the production is finished, if the ball seat 3 is worn, errors can occur in materials sucked and discharged each time in the cavity, and finally, the material quantity in the pressure kettle 5 is led to be seriously insufficient, so that the material proportion in the hydrolysis of 3-trifluoromethyl-4-nitrophenol is far more than expected, and the hydrolysis efficiency of the 3-trifluoromethyl-4-nitrophenol is affected.
Referring to fig. 8, the spacing mechanism includes a sealing tube 326 fixedly mounted on the outer wall of the rack two 31, the movable teeth 325 are slidably mounted in the bottom of the sealing tube 326, a movable block 328 is slidably mounted on the top of the sealing tube 326, a push switch 327 matched with the movable block 328 is fixedly mounted on the top of the sealing tube 326, and the sealing tube 326 is filled with transmission oil. The rotary push switch 327 of the movable block 328, which is engaged with the snap, has the same structure as the push ball pen, or the push switch 327 is directly used. The push switch 327 is used here. The ball adopts Q235 steel, the surface mirror surface grade is A2, and the contact surface of ball and ball seat 3 then inlays nickel alloy, increases intensity.
When the movable block 328 is located outside the sealing tube 326, the movable tooth 325 is located inside the sealing tube 326, the movable tooth 325 is not in contact with the gear 37 when the ball moves upward, and is in contact with the movable block 328 exposed outside the sealing tube 326 after the ball moves to the top of the ball seat 3, the movable block 328 is pressed into the sealing tube 326 and is locked by the push switch 327, at this time the movable tooth 325 is pushed out, the movable tooth 325 is meshed with the gear 37 when the ball moves downward, so that the gear 37 rotates clockwise by 1 °, and the ball rotates clockwise by 1 ° with respect to the ball seat 3 when the ball contacts the ball seat 3. When the ball moves up again, the gear 37 contacts the movable tooth 325, and after moving to the top of the ball seat 3, contacts the movable block 328 again, the movable block 328 is unlocked with the push switch 327, the movable tooth 325 is sucked into the sealing tube 326, and when the ball descends, the gear 37 does not contact the movable tooth 325, and after the ball contacts the ball seat 3, the ball rotates counterclockwise relative to the ball seat 3 by an angle of 1 °. The ball seat is in circular contact with the ball seat 3, and the strength of the two contact surfaces contacted with the ball seat 3 is correspondingly enhanced, so that the strength of the other surfaces is reduced, and the service life of the ball is relatively prolonged.
Compared with the first embodiment, the service life of the ball is also prolonged, but the implementation mode is different, in the first embodiment, the strength of the ball is uniformly distributed on each part of the surface, the service life of the ball is prolonged by enabling each part of the surface of the ball to be in equal probability of being in contact with the ball seat 3, in the second embodiment, the strength of the rest part of the ball is reduced, the strength is concentrated on two surfaces in contact with the ball seat 3, and the service life of the ball is prolonged under the condition that the cost is similar to that of the first embodiment.
Finally, it should be noted that the above embodiments are only for illustrating and facilitating the skilled person to understand the technical solution of the present invention, and are not limiting; the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions.
Claims (8)
1. A 3-trifluoromethyl-4-nitrophenol hydrolysis system comprising: the device comprises a diaphragm pump and a pressure kettle (5), wherein a pipeline is fixedly arranged on the pressure kettle (5), the diaphragm pump is fixedly connected with the pipeline, the diaphragm pump comprises a pump body (1), a transmission mechanism, upright posts (2) and diaphragms, two upright posts (2) are fixedly arranged on two sides of the pump body (1), one-way valves are fixedly arranged at the upper end and the lower end of each upright post (2), two diaphragms are fixedly arranged in the pump body (1), the transmission mechanism deforms the diaphragms to transmit materials, and each one-way valve comprises a ball and a ball seat (3);
The method is characterized in that:
The ball is fixedly provided with a rotating shaft (35), two sides of the ball seat (3) are provided with sliding grooves for accommodating the rotating shaft (35), the surface of the ball seat (3) is symmetrically and fixedly provided with a shell, two ends of the rotating shaft (35) are positioned in the shell, a driving unit for rotating the rotating shaft (35) is arranged in the shell, and the driving unit drives the rotating shaft (35) to rotate by utilizing the suction force or the thrust of the ball when the diaphragm is deformed, so that the ball orderly rotates in the ball seat (3), the rotating angle of the ball when moving upwards is different from the rotating angle of the ball when moving downwards, the contact surface of the ball and the ball seat (3) is different each time, and the ball seat (3) are rotated forwards or backwards by a set angle before contacting;
The driving unit comprises a first rack (33) fixedly arranged on the inner wall of the shell, gears (37) meshed with the first rack (33) are fixedly arranged at the two ends of the rotating shaft (35), a spacing mechanism is arranged in the shell, and the spacing mechanism enables the rotation angle of the gears (37) to be unequal to the rotation angle of the gears (37) when the ball moves upwards and the rotation angle of the gears (37) when the ball moves downwards, so that the contact surface of the ball and the ball seat (3) is different each time;
The spacing mechanism comprises a second rack (31) fixedly arranged on the inner wall of the shell, the second rack (31) and a first rack (33) are oppositely arranged, a section of toothless area is arranged on the first rack (33), movable teeth (325) are arranged on the second rack (31) only in the same height area corresponding to the toothless area of the first rack (33), when the gear (37) is meshed with the movable teeth (325) on the second rack (31), the gear (37) is positioned in the toothless area on the first rack (33), a first adhesive tape (34) is arranged on the side wall, corresponding to the toothless area, in the sliding groove, of the second rack (31), a through groove (323) is formed, a sliding block (322) is arranged in the through groove (323), the sliding block (322) is fixedly connected with the movable teeth (325), oblique blocks (324) are fixedly arranged on two sides of the sliding block (322), a fixed cylinder (32) is fixedly arranged on the shell, a spring (321) is fixedly arranged in the fixed cylinder (32), the spring (321) is arranged on the side wall of the sliding block, and the sliding block (321) is fixedly connected with the end part (33) of the sliding block (33), and the sliding block (35) is matched with the end part (33);
The push plate (36) is of a specific T-shaped structure, so that when the ball moves upwards, the push plate (36) is firstly contacted with the inclined blocks (324) at two sides of the movable teeth (325), and the movable teeth (325) are pressed into the through grooves (323), so that the gear (37) cannot be contacted with the movable teeth (325); when the ball moves downwards, the gear (37) is meshed with the movable teeth (325) first, so that the gear (37) rotates clockwise by a specified angle, and the rotation angle of the ball when moving upwards is different from the rotation angle of the ball when moving downwards.
2. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: the toothless area on the first rack (33) is positioned at the middle part of the toothless area.
3. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: the movable teeth (325) are positioned at the middle part of the second rack (31) corresponding to the toothless area.
4. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: the bottom of the sliding groove is provided with a second adhesive tape (39), and the first rack (33) is provided with no teeth at the bottom corresponding to the second adhesive tape (39).
5. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: and buffer blocks (38) matched with the push plate (36) are arranged on the first rack (33) and the second rack (31).
6. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: when the ball contacts with the ball seat (3), the distance between the center of the ball and the center of the contact surface of the ball seat (3) is equal to the diameter of the rotating shaft (35).
7. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: the arc length of the ball which rotates relative to the ball seat (3) each time is equal to the inclined chamfer angle of the contact surface of the ball seat (3) and the ball.
8. A 3-trifluoromethyl-4-nitrophenol hydrolysis system according to claim 1, wherein: the spacing mechanism comprises a sealing tube (326) fixedly arranged on the outer wall of the rack II (31), the movable teeth (325) are slidably arranged in the bottom of the sealing tube (326), a movable block (328) is slidably arranged at the top of the sealing tube (326), and a push switch (327) matched with the movable block (328) is fixedly arranged at the top of the sealing tube (326).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310488575.1A CN116440804B (en) | 2023-05-04 | 2023-05-04 | 3-Trifluoromethyl-4-nitrophenol hydrolysis system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310488575.1A CN116440804B (en) | 2023-05-04 | 2023-05-04 | 3-Trifluoromethyl-4-nitrophenol hydrolysis system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116440804A CN116440804A (en) | 2023-07-18 |
| CN116440804B true CN116440804B (en) | 2024-07-05 |
Family
ID=87125636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310488575.1A Active CN116440804B (en) | 2023-05-04 | 2023-05-04 | 3-Trifluoromethyl-4-nitrophenol hydrolysis system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116440804B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113844081A (en) * | 2021-09-01 | 2021-12-28 | 无锡蠡湖增压技术股份有限公司 | Gravity machine push-and-pull system for aluminum alloy shell |
| CN218502047U (en) * | 2022-09-30 | 2023-02-21 | 青岛和兴精细化学有限公司 | Hydrolysis kettle for preparing 5-methoxy-1- [4- (trifluoromethyl) phenyl ] -1-pentanone |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06101632A (en) * | 1992-09-21 | 1994-04-12 | Takatsuki Denki Seisakusho:Kk | Eccentric wheel drive type diaphragm pump |
| US6325932B1 (en) * | 1999-11-30 | 2001-12-04 | Mykrolis Corporation | Apparatus and method for pumping high viscosity fluid |
| JP4958121B2 (en) * | 2001-10-24 | 2012-06-20 | 株式会社タクミナ | Reciprocating pump and check valve |
| US7654283B2 (en) * | 2003-10-21 | 2010-02-02 | Seiko Epson Corporation | Check valve and pump including check valve |
| CN211852119U (en) * | 2020-03-24 | 2020-11-03 | 温州永广泵阀有限公司 | Diaphragm pump for mobile material conveying |
| CN213032451U (en) * | 2020-07-10 | 2021-04-23 | 广东职业技术学院 | A remove airtight feeding device for reducing VOCs discharges |
| CN112944172A (en) * | 2021-01-25 | 2021-06-11 | 江西润蒽智能科技有限公司 | Fixing base of remote monitoring equipment capable of being monitored wirelessly and use method |
| CN214616957U (en) * | 2021-04-30 | 2021-11-05 | 深圳市品成电机有限公司 | Single-cylinder diaphragm pump with long service life |
| CN218266269U (en) * | 2022-08-25 | 2023-01-10 | 浙江展博隔膜泵制造有限公司 | Pneumatic diaphragm pump convenient to clean |
-
2023
- 2023-05-04 CN CN202310488575.1A patent/CN116440804B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113844081A (en) * | 2021-09-01 | 2021-12-28 | 无锡蠡湖增压技术股份有限公司 | Gravity machine push-and-pull system for aluminum alloy shell |
| CN218502047U (en) * | 2022-09-30 | 2023-02-21 | 青岛和兴精细化学有限公司 | Hydrolysis kettle for preparing 5-methoxy-1- [4- (trifluoromethyl) phenyl ] -1-pentanone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116440804A (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116440804B (en) | 3-Trifluoromethyl-4-nitrophenol hydrolysis system | |
| CN112429178B (en) | A life-saving airbag delivery device and method thereof | |
| CN218152358U (en) | Waterproof and air-proof shaft seal structure of fuel cell air compressor | |
| CN116622933B (en) | Oxygen rifle anti-falling device | |
| CN117680818B (en) | Multi-station laser welding device for tubular part | |
| CN109622742A (en) | Multi-functional pipe fitting through hole stamping device | |
| CN212251138U (en) | Floating oil seal abrasion compensation structure | |
| CN119425852B (en) | Energy-saving grinding device for ganciclovir crude product before impurity removal | |
| CN109707351A (en) | A kind of Novel pressure-resistant perforation through tubing bullet | |
| CN113044174B (en) | Marine life-saving equipment with ice crushing function | |
| CN220880131U (en) | Prevent five metals stamping die of waste material adhesion | |
| CN119288385A (en) | A dissolvable ball seat for setting a packer for a salt cavern energy storage injection and production well | |
| CN110714123A (en) | Recoverable metal extractor of abandonment lithium ion battery | |
| CN114013087B (en) | Forming device and control method for massive solid carbon dioxide | |
| CN220267937U (en) | Reversible cycloid pump with hydraulic valve | |
| CN220168181U (en) | Multifunctional centrifugal pump | |
| CN110093484B (en) | Rotary micro blind hole cavitation device | |
| CN109667754A (en) | Hydraulic pump head | |
| CN218644872U (en) | Check valve with ribs | |
| CN117140648A (en) | Forming device is used in car callus on sole production and processing | |
| CN116608406A (en) | A hydrogen storage tank capable of automatic pressure relief and alarm | |
| CN115030076A (en) | Fire-fighting access isolation railing | |
| CN214605346U (en) | Medicinal PVC/PVDC composite hard sheet simplified separation device | |
| CN118188568B (en) | Shaft end mechanical sealing device of chemical centrifugal pump and application method thereof | |
| CN116066355B (en) | A gear pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |