CN211715835U - Three-way rotary cylinder angle valve - Google Patents
Three-way rotary cylinder angle valve Download PDFInfo
- Publication number
- CN211715835U CN211715835U CN202020018723.5U CN202020018723U CN211715835U CN 211715835 U CN211715835 U CN 211715835U CN 202020018723 U CN202020018723 U CN 202020018723U CN 211715835 U CN211715835 U CN 211715835U
- Authority
- CN
- China
- Prior art keywords
- valve
- inlet channel
- rotary cylinder
- core
- way rotary
- 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
Images
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses a three-way rotary cylinder angle valve, which relates to the technical field of pipeline valves and comprises a valve body, wherein a valve cavity, a first inlet channel, a second inlet channel and an outlet channel are arranged in the valve body, a diffusion pipe is sleeved in the outlet channel, and the valve body is connected with a valve cover; the bushing is arranged in the valve cavity, and the side wall of the bushing is provided with through holes corresponding to the first inlet channel and the second inlet channel respectively; the valve core is arranged in the bushing, a throttling window is formed in the side wall of the valve core, one end, not opened, of the valve core is connected with the valve rod, and the end part of the valve rod is connected with the pneumatic actuator; and two valve seats are arranged and are respectively positioned in the first inlet channel and the second inlet channel, and the end surfaces of the valve seats in the through holes are contacted with the side wall of the valve core to form sealing surfaces. The utility model can avoid the jam of the valve core while ensuring the sealing effect; meanwhile, the bush and the diffusion pipe arranged in the valve body can reduce the scouring of high-flow-rate medium to the valve body and prolong the service life of the valve.
Description
Technical Field
The utility model relates to a pipeline valve technical field, concretely relates to tee bend revolves a section of thick bamboo angle valve.
Background
The special valve for the coal chemical industry is an indispensable part in a coal chemical industry control system. The rotary cylinder type angle valve is used as a key valve in the technical processes of raw material pressurized conveying, gasifier feeding reaction and the like on coal chemical equipment, and plays a role in adjusting the pressure and the flow of a medium.
In the existing coal chemical industry pipeline, a two-way eccentric rotary valve is mostly adopted. When the medium containing a large amount of cinder flows through, the medium is corrosive, the pressure difference is large, the flow rate is high, the valve body, the valve core and the valve seat are greatly scoured, flash evaporation and cavitation phenomena are easily generated, the valve core is easily blocked, the valve is difficult to open and close, and the service life of the valve is short. In addition, the two-way eccentric rotary valve can not realize the switching of the flow direction of the pipeline, and the application range is greatly limited.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the prior art, the utility model aims to provide a tee bend revolves a section of thick bamboo angle valve when guaranteeing sealed effect, can avoid the case bite, extension valve life.
In order to achieve the above purpose, the utility model adopts the technical proposal that: a three-way rotary barrel angle valve comprising:
the valve comprises a valve body, a valve cavity, a first inlet channel, a second inlet channel and an outlet channel, wherein the first inlet channel, the second inlet channel and the outlet channel are respectively communicated with the valve cavity;
the bushing is a hollow cylinder with two open ends, and the side wall of the bushing is provided with through holes corresponding to the first inlet channel and the second inlet channel respectively;
the valve core is arranged in the bushing, the valve core is in a hollow cylinder shape with one open end, the side wall of the valve core is provided with a throttling window, one unopened end of the valve core is connected with a valve rod, the other end of the valve rod penetrates out of the valve cover, and the end part of the valve rod is connected with a pneumatic actuator;
and two valve seats are arranged and are respectively positioned in the first inlet channel and the second inlet channel, each valve seat is arranged in one through hole in a penetrating manner, and the end surface positioned in the through hole is contacted with the side wall of the valve core to form a sealing surface.
On the basis of the technical scheme, the side wall of the opening end of the valve core is circumferentially provided with a slag discharge hole.
On the basis of the technical scheme, a circle of flange is integrally formed at the end part of the diffusion pipe close to the valve cavity, the flange is attached to the inner wall of the valve cavity, and one end, far away from the diffusion pipe, of the flange is abutted to the lining.
On the basis of the technical scheme, the valve rod comprises a rod body and a fixing part which are connected, and an internal threaded hole is formed in the end face, facing the valve core, of the fixing part;
the non-opening end of the valve core is provided with a connecting part, and the connecting part is provided with an external thread hole matched with the internal thread.
On the basis of the technical scheme, the side wall of the fixing part is provided with a threaded hole for the anti-rotation pin to penetrate through, and the anti-rotation pin penetrates through the threaded hole to be connected with the connecting part.
On the basis of the above technical solution, the fixing portion is disposed in the valve chamber, and an outer diameter of the fixing portion is the same as an outer diameter of the valve element.
On the basis of the technical scheme, the outer wall of the valve seat is provided with a step surface, and the valve seat filler pressing sleeve are sequentially sleeved on the step surface.
On the basis of the technical scheme, a valve seat gland is further arranged in the first inlet channel and the second inlet channel, the valve seat gland is sleeved and pressed on the valve seat packing pressing sleeve, and one end, far away from the valve seat packing pressing sleeve, of the valve seat gland is fixed to the valve body through an inner hexagonal screw.
On the basis of the technical scheme, the first inlet channel, the second inlet channel and the outlet channel are distributed in a T shape, and the first inlet channel and the second inlet channel are positioned on the same straight line.
On the basis of the technical scheme, the valve rod packing is arranged between the valve rod and the valve cover, the valve rod packing pressing sleeve pressed on the valve rod packing and the valve rod packing pressing plate pressed on the valve rod packing pressing sleeve are sleeved on the valve rod, and the valve rod packing pressing plate is fixed on the valve cover through the adjusting screw.
Compared with the prior art, the utility model has the advantages of:
(1) the three-way rotary cylinder angle valve in the utility model utilizes the end face of the valve seat penetrating through the through hole to contact with the side wall of the valve core and form a sealing surface, when a high-flow-rate medium flows through, the sealing surface is hidden in the valve seat, the medium does not scour the sealing surface, and the valve core rotates relative to the valve seat to generate shearing force, thereby ensuring the sealing effect and avoiding the jamming of the valve core; meanwhile, the bush and the diffusion pipe arranged in the valve body can reduce the scouring of high-flow-rate medium to the valve body and prolong the service life of the valve.
(2) The utility model provides a tee bend revolves a section of thick bamboo angle valve, because two sides about the case are directly acted on to the semicircle face of two disk seats, not only sealed face is great, and two disk seat interact forces are balanced, under the medium of high pressure differential washes away the brush, can not produce the shock of case, the stability of case is good on the one hand, avoids case and valve rod junction not hard up, on the other hand has reduced the noise when medium circulates.
(3) The utility model provides a tee bend revolves a section of thick bamboo angle valve, the slag discharge hole has been seted up along circumference to the lateral wall of case open end, can discharge outlet channel with the long-pending cinder that stays between case and the bush through the slag discharge hole, prevents the case bite.
(4) The utility model provides a tee bend revolves a section of thick bamboo angle valve, through the cooperation of diffusion tube with the bush, but furthest's protection valve body avoids valve pocket and outlet passage inner wall to receive the washing away of high velocity of flow medium.
(5) The utility model provides a tee bend revolves a section of thick bamboo angle valve through setting up first inlet channel and second inlet channel, can realize the controllability of medium flow direction.
(6) The utility model provides a tee bend revolves a section of thick bamboo angle valve, the connecting portion of case and the fixed part of valve rod pass through threaded connection to carry on spacingly through preventing changeing the pin, make valve rod and case dismouting and change convenient, and strengthened case and the stability of being connected of valve rod through preventing changeing the pin, prevent that the two relative case that leads to of rotating is not hard up, and then avoid leading to the valve rod and case junction fracture because of the case is not hard up, lead to the valve inefficacy.
Drawings
FIG. 1 is a schematic structural view of a three-way rotary cylinder angle valve according to an embodiment of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
FIG. 3 is an enlarged view of B in FIG. 1;
fig. 4 is a schematic structural diagram of a valve body in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a diffuser in an embodiment of the present invention;
FIG. 6 is a schematic view of the connection of the valve spool to the valve stem.
Reference numerals:
1-a valve body, 11-a valve chamber, 12-a first inlet passage, 13-a second inlet passage, 14-an outlet passage;
2-diffuser, 21-flange;
3-valve cover;
4-bushing, 41-through hole;
5-valve core, 51-throttling window, 52-slag discharge hole and 53-connecting part;
6-valve rod, 61-rod body, 62-fixing part, 63-anti-rotation pin, 64-valve rod packing, 65-valve rod packing pressing sleeve, 66-valve rod packing pressing plate and 661-first stud;
7-valve seat, 71-valve seat filler, 72-valve seat filler pressing sleeve, 73-valve seat pressing cover, 731-socket head cap screw;
8-pneumatic actuator, 9-support.
Detailed Description
The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1-3, the present invention provides an embodiment of a three-way rotary cylinder angle valve, which includes a valve body 1, a bushing 4, a valve core 5, and a valve seat 7.
Referring to fig. 4, a valve chamber 11, a first inlet passage 12, a second inlet passage 13 and an outlet passage 14 are arranged in the valve body 1, and the first inlet passage 12, the second inlet passage 13 and the outlet passage 14 are respectively communicated with the valve chamber 11. In this embodiment, the first inlet channel 12, the second inlet channel 13 and the outlet channel 14 are distributed in a T shape, and the first inlet channel 12 and the second inlet channel 13 are located on the same straight line. In this embodiment, the adjustability of the medium flow direction is achieved by the first inlet channel 12, the second inlet channel 13 and the outlet channel 14 of the valve body 1.
The outlet channel 14 is also internally sleeved with a diffusion pipe 2, and the diffusion pipe 2 is cylindrical. The valve body 1 is connected with a valve cover 3, and the valve cover 3 is buckled above the valve cavity 11.
The bush 4 is disposed in the valve cavity 11, the bush 4 is a hollow cylinder with two open ends, and the sidewall of the bush 4 is provided with through holes 41 respectively corresponding to and communicating with the first inlet channel 12 and the second inlet channel 13. The axes of the two through holes 41 coincide.
The valve body 5 is provided in the bush 4, and the valve body 5 has a hollow cylindrical shape with one end opened, and the opening is provided corresponding to the outlet passage 14. The side wall of the valve core 5 is provided with a throttle window 51, wherein the throttle window 51 is circular or elliptical, and the area is smaller than the cross-sectional area of the first inlet channel 12 and the second inlet channel 13. Preferably, there are two throttle windows 51, and the axes of the two throttle windows 51 are perpendicular to each other.
The non-open end of the valve core 5 is connected with a valve rod 6, the other end of the valve rod 6 penetrates out of the valve cover 3, and the end part of the valve rod 6 is connected with a pneumatic actuator 8. The valve rod 6 can be controlled to rotate through the pneumatic actuator 8, and then the valve core 5 is driven to rotate.
The valve seats 7 are two and are of saddle-shaped ring structures. Each valve seat 7 is respectively positioned inside the first inlet channel 12 and the second inlet channel 13, each valve seat 7 is arranged in one through hole 41 in a penetrating way, and the end part of the valve seat 7 positioned in the through hole 41 is in sealing contact with the side wall of the valve core 5 to form a sealing surface.
In the three-way rotary cylinder angle valve of the embodiment, the valve seat 7 penetrates through the end face of the through hole 41 to be in contact with the side wall of the valve core 5 and form a sealing surface, when a high-flow-rate medium flows through, the sealing surface is hidden in the valve seat 7, the medium does not scour the sealing surface, the sealing effect during closing cannot be influenced, the valve core 5 and the valve seat 7 rotate relatively to generate shearing force, the sealing effect is ensured, and the valve core 5 can be prevented from being jammed; meanwhile, the bush 4 and the diffusion pipe 2 arranged in the valve body 1 can reduce the scouring of the high-flow-rate medium on the valve body 1 and prolong the service life of the valve.
Preferably, the valve core 5 and the valve seat 7 are integrally made of tungsten carbide materials, the valve core 5 and the valve seat 7 are high in hardness, the HRA is larger than or equal to 90, and the valve core is extremely wear-resistant and scouring-resistant.
In this embodiment, since the throttling window 51 is located on the side wall of the valve core 5, the cavitation zone is mainly located inside the valve core 5, that is, most of the energy is released when inside the valve core 5, the outlet passage 14 is far away from the throttling window 51, the diffusion pipe 2 in the outlet passage 14 is made of tungsten carbide material, and has high hardness, high wear resistance and erosion resistance, and therefore, the degree of cavitation damage at the outlet passage 14 is small.
The semicircular arc surfaces of the two valve seats 7 directly act on the left side surface and the right side surface of the valve core 5, so that the sealing surface is large, the interaction force of the two valve seats 7 is balanced, the vibration of the valve core 5 cannot be generated under the medium flushing of high pressure difference, on one hand, the stability of the valve core is good, the connection part of the valve core 5 and the valve rod 6 is prevented from being loosened, and on the other hand, the noise generated when the medium circulates is reduced.
On the basis of the above embodiments, in the present embodiment, the sidewall of the opening end of the valve core 5 is provided with the slag discharge hole 52 along the circumferential direction. Optionally, there are 4 slag discharge holes 52, and the holes are evenly spaced.
The coal slag accumulated between the valve core 5 and the liner 4 can be discharged to the outlet passage 14 through the slag discharge hole 52. In addition, when the valve core 5 and the valve seat 7 rotate relatively, the valve seat 7 can cut off the medium which is attached to the outer wall of the valve core 5 and is positioned at the sealing surface in a circle, and the medium is discharged to the outlet channel 14 through the slag discharge hole 52, so that the valve core 5 is prevented from being jammed.
As shown in fig. 5, a ring of flange 21 is integrally formed at an end of the diffuser 2 close to the valve chamber 11, the flange 21 is attached to an inner wall of the valve chamber 11, and an end of the flange 21 remote from the diffuser 2 abuts against the bushing 4. The valve body 1 can be protected to the maximum extent by matching the diffusion pipe 2 with the lining 4, and the inner walls of the valve cavity 11 and the outlet passage 14 are prevented from being washed by high-flow-rate media. Optionally, the diffuser tube 2 and the liner 4 are both made of tungsten carbide material.
Referring to fig. 6, in the second embodiment, the valve rod 6 includes a rod 61 and a fixing portion 62 connected to each other, and optionally, the rod 61 and the fixing portion 62 are integrally formed. The fixing portion 62 has an internally threaded hole formed in an end surface thereof facing the valve body 5.
A connection portion 53 is provided at the non-open end of the valve body 5, and the connection portion 53 is provided with a male screw hole that engages with a female screw. The valve body 5 is fixed to the valve stem 6 by screwing the connecting portion 53 into the female screw hole of the fixing portion 62.
Furthermore, a threaded hole for passing a rotation-preventing pin 63 is formed in the side wall of the fixing portion 62, and the rotation-preventing pin 63 passes through the threaded hole to be connected with the connecting portion 53. Can further strengthen case 5 and valve rod 6's stability of being connected through preventing changeing pin 63 to prevent that the two from rotating relatively and leading to case 5 not hard up, and then avoid leading to the valve inefficacy because of the case 5 is not hard up to cause valve rod 6 and case 5 junction fracture.
In this embodiment, the fixing portion 62 is disposed in the valve chamber 11, and the outer diameter of the fixing portion 62 is the same as the outer diameter of the valve element 5.
In addition to the above embodiments, in the present embodiment, the outer wall of the valve seat 7 is provided with a step surface, and the valve seat packing 71 and the valve seat packing pressing sleeve 72 are sequentially sleeved on the step surface.
Further, a valve seat pressing cover 73 is further disposed in the first inlet channel 12 and the second inlet channel 13, the valve seat pressing cover 73 is sleeved on and pressed on the valve seat packing pressing sleeve 72, and one end of the valve seat pressing cover 73, which is far away from the valve seat packing pressing sleeve 72, is fixed to the valve body 1 through a socket head cap screw 731, so as to press the valve seat packing pressing sleeve 72 and the valve seat packing 71, and ensure that the valve seat 7 is sealed.
Optionally, an O-ring is disposed between the outer ring of the valve seat gland 73 and the valve body 1, and the sealing effect between the valve seat gland 73 and the valve body 1 is achieved through the O-ring.
Referring to fig. 3, in the present embodiment, a valve stem packing 64 is disposed between the valve stem 6 and the bonnet 3, a valve stem packing pressing sleeve 65 pressed on the valve stem packing 64 and a valve stem packing pressing plate 66 pressed above the valve stem packing pressing sleeve 65 are further sleeved on the valve stem 6, and the valve stem packing pressing plate 66 is fixed to the bonnet 3 by an adjusting screw. The valve rod packing pressing plate 66 is fixedly connected with the valve cover 3 through a first hexagon nut and a first stud 661, so as to compress the valve rod packing 64 and ensure the sealing of the valve rod 6.
In this embodiment, the valve cover 3 is fixedly connected with the valve body 1 through a second hexagon nut and a second stud, and a metal winding pad is arranged between the valve cover 3 and the valve body 1 to ensure sealing between the two.
In this embodiment, the pneumatic actuator 8 is fixedly connected to the support 9 through a third hexagon nut and a third stud, and the support 9 is fixed to the bonnet 3 through a fourth hexagon nut and a fourth stud.
The first inlet channel 12 is opened, the second inlet channel 13 is closed to be in an initial state, when the valve core 5 is driven by the pneumatic actuator 8 to rotate clockwise by 90 degrees from the initial state, the first inlet channel 12 is closed, the second inlet channel 13 is opened, and a medium flows from the second inlet channel 13 to the outlet channel 14. Then, when the valve core 5 is driven by the pneumatic actuator 8 to rotate 90 degrees counterclockwise, the first inlet channel 12 is opened again, the second inlet channel 13 is closed again, and the medium flows from the first inlet channel 12 to the outlet channel 14.
The three-way rotary cylinder angle valve of the embodiment can be used for regulating the flow and the liquid level of black water and grey water in a gasification device, has long service life, reduces the risk of equipment parking, and improves the economic benefit.
The present invention is not limited to the above preferred embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is within the scope of protection.
Claims (10)
1. A three-way rotary cylinder angle valve is characterized by comprising:
the valve comprises a valve body (1), a valve cavity (11), a first inlet channel (12), a second inlet channel (13) and an outlet channel (14), wherein the first inlet channel, the second inlet channel and the outlet channel are respectively communicated with the valve cavity (11), a diffusion pipe (2) is sleeved in the outlet channel (14), the valve body (1) is connected with a valve cover (3), and the valve cover (3) is buckled above the valve cavity (11);
the bushing (4) is arranged in the valve cavity (11), the bushing (4) is a hollow cylinder with two open ends, and the side wall of the bushing is provided with through holes (41) corresponding to the first inlet channel (12) and the second inlet channel (13) respectively;
the valve core (5) is arranged in the bushing (4), the valve core (5) is in a hollow cylinder shape with one open end, the side wall of the valve core is provided with a throttling window (51), one end, which is not open, of the valve core (5) is connected with the valve rod (6), the other end of the valve rod (6) penetrates out of the valve cover (3), and the end part of the valve rod is connected with the pneumatic actuator (8);
and two valve seats (7) are arranged and are respectively positioned in the first inlet channel (12) and the second inlet channel (13), each valve seat (7) is arranged in one through hole (41) in a penetrating way, and the end surface positioned in the through hole (41) is contacted with the side wall of the valve core (5) to form a sealing surface.
2. The three-way rotary cylinder angle valve of claim 1, wherein: and a slag discharge hole (52) is formed in the side wall of the opening end of the valve core (5) along the circumferential direction.
3. The three-way rotary cylinder angle valve of claim 2, wherein: the end part, close to the valve cavity (11), of the diffusion pipe (2) is integrally provided with a circle of flange (21), the flange (21) is attached to the inner wall of the valve cavity (11), and one end, far away from the diffusion pipe (2), of the flange (21) is abutted to the lining (4).
4. The three-way rotary cylinder angle valve of claim 1 or 3, wherein:
the valve rod (6) comprises a rod body (61) and a fixing part (62) which are connected, and an internal threaded hole is formed in the end face, facing the valve core (5), of the fixing part (62);
the non-opening end of the valve core (5) is provided with a connecting part (53), and the connecting part (53) is provided with an external thread hole matched with the internal thread.
5. The three-way rotary cylinder angle valve of claim 4, wherein: the side wall of the fixing part (62) is provided with a threaded hole for the anti-rotation pin (63) to penetrate through, and the anti-rotation pin (63) penetrates through the threaded hole to be connected with the connecting part (53).
6. The three-way rotary cylinder angle valve of claim 4, wherein: the fixing part (62) is arranged in the valve cavity (11), and the outer diameter of the fixing part (62) is the same as that of the valve core (5).
7. The three-way rotary cylinder angle valve of claim 1, wherein: the outer wall of the valve seat (7) is provided with a step surface, and a valve seat filler (71) and a valve seat filler pressing sleeve (72) are sequentially sleeved on the step surface.
8. The three-way rotary cylinder angle valve of claim 7, wherein: the valve seat pressing cover (73) is further arranged in the first inlet channel (12) and the second inlet channel (13), the valve seat pressing cover (73) is sleeved and pressed on the valve seat packing pressing sleeve (72), and one end, far away from the valve seat packing pressing sleeve (72), of the valve seat pressing cover (73) is fixed to the valve body (1) through a hexagon socket head cap screw.
9. The three-way rotary cylinder angle valve of claim 1, wherein: the first inlet channel (12), the second inlet channel (13) and the outlet channel (14) are distributed in a T shape, and the first inlet channel (12) and the second inlet channel (13) are located on the same straight line.
10. The three-way rotary cylinder angle valve of claim 1, wherein: the valve rod packing pressing device is characterized in that a valve rod packing (64) is arranged between the valve rod (6) and the valve cover (3), a valve rod packing pressing sleeve (65) which is pressed on the valve rod packing (64) and a valve rod packing pressing plate (66) which is pressed above the valve rod packing pressing sleeve (65) are further sleeved on the valve rod (6), and the valve rod packing pressing plate (66) is fixed on the valve cover (3) through an adjusting screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020018723.5U CN211715835U (en) | 2020-01-06 | 2020-01-06 | Three-way rotary cylinder angle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020018723.5U CN211715835U (en) | 2020-01-06 | 2020-01-06 | Three-way rotary cylinder angle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211715835U true CN211715835U (en) | 2020-10-20 |
Family
ID=72820699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020018723.5U Active CN211715835U (en) | 2020-01-06 | 2020-01-06 | Three-way rotary cylinder angle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211715835U (en) |
-
2020
- 2020-01-06 CN CN202020018723.5U patent/CN211715835U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201236974Y (en) | Non-return valve | |
| WO2010121286A1 (en) | Domestic water tap or faucet with floating buoyant ball valve and activation rod | |
| CN211715835U (en) | Three-way rotary cylinder angle valve | |
| CN202484345U (en) | Slag locking valve | |
| CN208474627U (en) | Anti-theft ball valve | |
| CN102537464A (en) | Erosion-resistant slag-water high-pressure angle type regulating valve | |
| CN214743592U (en) | Slurry regulating valve core assembly and slurry regulating valve | |
| CN212718121U (en) | High-temperature high-pressure hard sealing ball valve | |
| CN210218759U (en) | Ball valve special for coal chemical industry | |
| CN202360791U (en) | Novel arc cut-off and control valve | |
| CN208793706U (en) | A kind of lining fire safe type high temperature tee joint butterfly valve | |
| RU2485375C2 (en) | Valve | |
| CN111734835A (en) | Axial-flow type cut-off valve | |
| CN112413165A (en) | Pressure-stabilizing ball valve | |
| CN214999448U (en) | Spiral center line butterfly valve without pin lining rubber | |
| CN201232765Y (en) | Blowoff ball valve | |
| CN220956861U (en) | Hard sealing butterfly valve | |
| CN210739401U (en) | Three-eccentric bidirectional hard seal butterfly valve | |
| CN217003183U (en) | Super-wear-resistant ball valve with wear-resistant coating | |
| CN216200627U (en) | Adjusting butterfly valve | |
| CN217808930U (en) | Regular back-flushing device for sludge discharge pipe of anaerobic tower | |
| CN216242390U (en) | Thread hydraulic double-sealing water tap | |
| CN2589767Y (en) | Screw bolt pushing type parallel sealing angle valve | |
| CN218718948U (en) | Ball valve with anti-blocking function | |
| CN217842737U (en) | Angle-shaped slurry valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |