CN113374882A - Purging type discharging plunger valve - Google Patents

Purging type discharging plunger valve Download PDF

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Publication number
CN113374882A
CN113374882A CN202110702838.5A CN202110702838A CN113374882A CN 113374882 A CN113374882 A CN 113374882A CN 202110702838 A CN202110702838 A CN 202110702838A CN 113374882 A CN113374882 A CN 113374882A
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CN
China
Prior art keywords
valve
plunger
piston
purge
cylinder
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.)
Pending
Application number
CN202110702838.5A
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Chinese (zh)
Inventor
杨军社
刘尧
韩前卫
李敏哲
江晓春
李珍珍
乔彦军
杨亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Aerospace Yuanzheng Fluid Control Co Ltd
Original Assignee
Xian Aerospace Yuanzheng Fluid Control Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Xian Aerospace Yuanzheng Fluid Control Co Ltd filed Critical Xian Aerospace Yuanzheng Fluid Control Co Ltd
Priority to CN202110702838.5A priority Critical patent/CN113374882A/en
Publication of CN113374882A publication Critical patent/CN113374882A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/243—Packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)

Abstract

The invention discloses a purging type discharging plunger valve. The main components of the plunger valve are a valve body, a plunger, a cylinder, a piston and a piston rod; wherein the plunger is movably arranged in the valve body; the piston is movably arranged in the cylinder, when the valve is in work, under the driving of air pressure on two sides of the piston in the cylinder, the piston drives the piston rod and the plunger to move axially to open and close the valve, when the valve is in a closed state, the plunger seals a material container discharge port, and when the valve is in an open state, one end of the plunger strides over the valve discharge port to open the valve. The plunger valve stroke of the invention can ensure that the plunger is completely separated from the valve discharge hole under the valve opening state, and ensure the smooth discharge channel; the tail end of the plunger piston is completely flush with the wall of the container in a closed state, so that no feed liquid crystal is formed on the plunger piston; the purging mechanism is arranged, after the valve is unloaded, the purging gas can purge residual solid particles attached to the inner wall of the cavity of the valve body and the plunger piston to a valve discharge port in the unloading process, and no residue is left in the valve.

Description

Purging type discharging plunger valve
Technical Field
The invention relates to a valve, in particular to a purging type discharging plunger valve for a chemical storage tank containing solid particles.
Background
The discharge valve is arranged at the bottom discharge hole of the solid particle chemical storage tank or the reaction tank (namely a material container), and is specially used for discharging the material liquid in the storage tank. The medium in the tank contains solid particles which are easy to crystallize, toxic gas and the like, and the discharge valve is required to have good sealing property, meet the zero leakage requirement and have long service life. There are three main types of currently common discharge valves, an upward-expanding discharge valve, a downward-expanding discharge valve, and a globe valve.
No matter the valve is an upward-expanding type valve, a downward-expanding type valve or a spherical valve, due to the structural reasons of a valve core and a valve body, solid particles in a storage tank are easy to crystallize on the surface of a valve seat and at the sealing position of a valve rod packing, and are accumulated for a long time to form large particles, so that the valve sealing packing and the sealing surface of the valve seat are abraded, and the valve leakage is caused; in addition, the motion condition of the valve core can only be observed on site in the opening and closing states of the existing valve, if toxic gas leaks, the damage is easily brought to site operators, and most importantly, the service temperature of the existing discharge valve cannot meet the requirement of more than 400 ℃.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the invention provides a purging type discharging plunger valve.
To this end, the invention provides a purge-type discharge plug valve comprising:
the valve body is internally provided with a working through hole along the axial direction, one axial end A of the valve body is used for being connected with the material container discharge hole, the other axial end of the valve body is an end B, the side wall of the working through hole of the valve body is provided with a valve discharge hole and a purge gas inlet, and the purge gas inlet is axially positioned in the area of the valve discharge hole in the axial direction;
the gas inlet and outlet are formed in the two axial ends of the cylinder, a first working hole is formed in one axial end of the cylinder, a guide piece is arranged in the cylinder, one end of the guide piece is connected with the first working hole, the other end of the guide piece extends into the cylinder along the axial direction, and a second working hole is formed in the other end of the guide piece;
a plunger; a piston and a piston rod;
the plunger is movably arranged in the working through hole, one end of the plunger extends out of the end B, a wiping ring is arranged between the plunger and the inner wall of the working through hole and is positioned between the purging gas inlet and the end B, and a sealing structure is arranged between the plunger and the working through hole;
the cylinder is arranged on the side of the end B of the valve body along the axial direction, a distance is reserved between the cylinder and the valve body, the piston is movably arranged in the cylinder to divide the cylinder into two axial cavities, one end of the piston rod is arranged on the piston, the other end of the piston rod penetrates through the second working hole, and the piston rod extends in the guide piece along the axial direction and is connected with the end part of the plunger extending end B;
the piston drives the piston rod and the piston to move axially under the driving of the air pressure difference of the cavities on the two sides, so that the plunger valve is closed and opened, in the closed state, the end A and the valve discharge port are closed by the plunger, in the process from closing to opening, one end of the plunger strides over the valve discharge port to open the valve discharge port, and the other end of the plunger penetrates through the first working hole and extends into the guide piece.
Further, the wiper ring is transition fitted with the plunger.
Further, the outer diameter of the plunger is larger than that of the piston rod.
Furthermore, a discharge barrel is arranged at the position of the valve discharge port outwards, the discharge barrel is installed in an axially inclined mode, and the outlet of the discharge barrel faces to the end B.
Further, the aperture of the purge gas inlet is smaller than the aperture of the valve material outlet, the purge gas inlet is radially opposite to the valve discharge port, and the purge gas inlet is located in the middle area of the valve discharge port in the axial direction.
Further, a valve body bushing is installed at the end A of the working through hole, and a conical surface sealing structure is arranged between the plunger and the valve seat bushing.
Furthermore, a guide shaft bushing is arranged between the inner wall of the working through hole and the plunger, and the guide shaft bushing is positioned between the wiping ring and the end B.
Further, the end B of the valve body is provided with a gland seal assembly, and the plunger penetrates through the gland seal assembly.
Further, the end B of the valve body is connected with the cylinder through a support bolt.
And the discharging valve is arranged at a discharging hole of the material container through the container connecting block.
Further, still include gas supply unit, gas supply unit with sweep the gas import with the gas exit on the cylinder is connected.
Further, the gas supply device comprises a gas source and a gas storage tank, the gas source is connected with the purging gas inlet through a valve, the gas source is connected with the gas storage tank through a one-way valve, and the gas storage tank is respectively connected with the two gas inlets and outlets through a valve group.
Furthermore, a position detection device is arranged on the motion stroke of the plunger, the piston rod and the piston.
The plunger valve stroke of the invention can ensure that the plunger is completely separated from the valve discharge port under the valve opening state, ensure the smooth discharge passage and have no dead zone; the tail end of the plunger piston is completely flush with the wall of the container in a closed state, so that no feed liquid crystal is formed on the plunger piston; the purging mechanism is arranged, after the valve is unloaded, the purging gas can purge the residual solid particles attached to the inner wall of the cavity of the valve body and the plunger piston in the unloading process to the discharge port of the valve, so that no residual solid particles are left in the valve; meanwhile, the plunger has a self-cleaning function, the plunger is provided with the wiping ring structure, the wiping ring and the plunger are in transition fit, the wiping ring scrapes the surface of the plunger in the movement process of the plunger, if solid particles are remained on the surface of the plunger, the solid particles in a medium cannot enter a sealing filler part, the filler cannot be abraded, and the valve outer seal is reliable.
In some schemes, the air path system is arranged on the valve body, and can adjust the movement speed of the plunger so as to adjust the opening and closing speeds of the valve, and in addition, the valve can be ensured to be in a closed position under the fault states of on-site power failure and air failure, so that the occurrence of safety accidents is avoided.
Drawings
FIG. 1 is a block diagram of a plunger valve according to an embodiment of the present invention in a fully closed state;
FIG. 2 is a block diagram of an embodiment of the present invention illustrating a fully open plunger valve;
the reference numbers in the figures illustrate: 1-a valve body; 2-a plunger; 3-a cylinder; 4-a piston; 5, a piston rod; 6-a guide; 7-a purge gas inlet; 8-valve discharge; 9-a wiping ring; 10-a gas source; 11-a gas storage tank; 12-gas inlet and outlet; 13-a guide bushing; 14-a sealing packing assembly; 15-a gland seal assembly; 16-a support bolt; 17-a valve body bushing; 18-a discharge cylinder; 19-a first position switch bracket; 20-a first position proximity switch; 21 cylinder end cover; 22-a second position indicator needle; 23-a second position switch bracket; 24-a second position proximity switch; 25-a speed regulating valve; 26-a speed regulating valve; 27-a two-position five-way solenoid valve; 28-filter pressure relief valve; 29-a one-way valve; 30-filter pressure relief valve; 31-container connecting block; 32-a material container; 33-purge gas inlet flange.
Detailed Description
Unless otherwise specified, the terminology herein is to be understood in accordance with the conventional knowledge of one of ordinary skill in the relevant art.
The axial, radial, etc. direction or orientation terms described herein are consistent with the corresponding directions or orientations in the drawings. It should be noted that these directions or orientations are used to explain the relative spatial relationship of the components or features of the present invention, and do not limit the relative spatial relationship of the components or features, and those skilled in the art should make any spatial or/and direction/orientation substitutions based on the technical concept of the present invention.
As shown in fig. 1, the purging type discharging plunger valve mainly comprises a valve body 1, a plunger 2, a cylinder 3, a piston 4, a piston rod 5, a wiping ring 9 and a guide piece 6; and all the parts are arranged in the axial direction, wherein,
a working through hole is formed in the valve body along the axial direction, for clearly describing the structure of the valve body, two axial ends of the valve body are respectively defined as an end A and an end B, the end A is used for being connected with a material outlet of a material container 33, meanwhile, a sweeping gas inlet 7 and a valve material outlet 8 are formed in the side wall of the working through hole, and in order to ensure the sweeping function, the position of the sweeping gas inlet in the axial direction is located in the area where the valve material outlet 8 is located in the axial direction;
the two axial ends of the cylinder 3 are provided with gas inlets and outlets 12, and one end of the cylinder is also provided with a first working hole;
the specific assembly mode of each part is that the plunger 2 is movably arranged in the working through hole, one end of the plunger extends out of the end B, the wiping ring 9 is arranged between the working through hole and the plunger and is used for wiping materials on the plunger when the plunger moves, and meanwhile, a sealing structure is arranged between the plunger and the inner wall of the working through hole, and the sealing structure is specifically arranged at two end parts;
the cylinder is arranged on the side B of the end of the valve body along the axial direction, a distance is reserved between the cylinder and the valve body, the piston is movably arranged in the cylinder to divide the cylinder into an axial cavity or a left cavity and a right cavity shown in the figure 1, the piston can move in the cylinder along the axial direction, the guide piece 6 is arranged in the cylinder along the axial direction, one end of the guide piece is arranged at the first working hole, the other end of the guide piece is provided with a second working hole, one end of the piston rod 5 is fixedly connected with the piston, the other end of the piston rod penetrates through the second working hole to extend in the guide piece along the axial direction, and the other end of the piston rod is connected with the end part of the B end of the plunger; during operation, under the drive of the air pressure on the two sides of the piston in the cylinder, the piston drives the piston rod and the plunger to move axially to open and close the valve, when the valve is in a closed state, the plunger is connected to the end A to seal the material container discharge port, when the valve is in an open state, the inner wall of the end A, far away from the end A, of the plunger is connected to the valve discharge port in one end to stride across the valve discharge port 8, and the other end of the plunger penetrates through the first working hole to extend into the guide piece, as shown in fig. 2.
In some embodiments, in order to ensure effective wiping of impurities on the surface of the plunger by the wiping ring 9, the two are in interference fit in terms of structure size.
In consideration of the structure of the material container, the material characteristics and the strength and reliability requirements of the plunger valve, in some embodiments, the outer diameter of the plunger is larger than the outer diameter of the piston rod. The valve outlet is provided with an outlet cylinder 18 which is arranged outwards and is inclined relative to the axial direction, and the outlet of the outlet cylinder faces to the end B.
In some schemes, the aperture of the purge gas inlet is smaller than that of the valve material outlet in consideration of the gas purge force and the purge work efficiency, the purge gas inlet is radially opposite to the valve outlet, and the purge gas inlet is positioned in the axial middle area of the valve outlet.
In the specific scheme, the sealing structure between the plunger 2 and the inner wall of the working through hole can adopt a sealing structure known in the field, and can also adopt the sealing structure provided by the invention, specifically, a valve body bush 17 is arranged at the end A of the valve body, and the end part of the plunger and the end part of the valve body bush are sealed by adopting a conical structure, so that the valve body bush can be replaced according to the abrasion condition in the using process, and the real-time effective sealing is realized. At the end B of the valve body, a stuffing box sealing assembly 14 can be adopted between the plunger and the inner wall of the working through hole, if the two ends of the axial stuffing box sealing assembly adopt a flexible graphite and metal wire winding composite structure for supporting, and 3 flexible graphite rings are adopted in the middle of the axial stuffing box sealing assembly for making a sealing structure, the sealing structure can work in a high-temperature environment.
In other schemes, considering the large stroke of the valve body, in order to ensure the accuracy of the moving direction of the plunger, a guide bush 13 can be further arranged between the plunger and the inner wall of the working through hole, and particularly between the wiping ring and the end sealing structure. Further, a gland sealing assembly can be arranged at the end B of the valve body, and the plunger penetrates through the gland sealing assembly to further perform the guiding function of the plunger or perform the guiding function together with the guiding bush 13.
In a specific embodiment, the invention can work in an environment with high temperature, such as above 400 degrees, by reasonably selecting materials, and particularly, all parts in contact with a high-temperature medium are made of high-temperature resistant materials.
On the basis of the scheme, the more specific plunger valve works about 330mm, the stroke can ensure that the plunger is completely separated from the valve outlet under the opening state of the valve, the discharging channel is ensured to be smooth, and no dead zone exists; and the tail end of the plunger piston is completely flush with the wall of the container in a closed state, so that no feed liquid crystal exists on the plunger piston.
In other solutions, the valve body 1 and the cylinder 3 may be connected by a support bolt 16. The valve body and the material container can be connected through a container connecting block 31.
On the basis of the scheme, a further product also comprises a gas supply device for supplying gas pressure to the purge gas inlet and the gas inlet and outlet on the cylinder or collecting gas in the cylinder.
In the concrete scheme, as shown in fig. 1, the gas supply device comprises a gas source 10 and a gas storage tank 11, the gas source is connected with a purging gas inlet through a valve 30 and a purging gas inlet flange 33, the gas source is connected with the gas storage tank 11 through a one-way valve 29, and the gas storage tank is respectively connected with two gas inlets and outlets through a filtering pressure reducing valve 28, a two-position five-way electromagnetic valve 27 and two speed regulating valves (25 and 26). The air supply system is internally provided with a one-way valve 29, an air storage tank 11, a filtering pressure reducing valve 28, a two-position five-way electromagnetic valve 27 and two speed regulating valves, and on one hand, the movement speed of the valves can be regulated according to the field use requirements; meanwhile, the plunger 2 and the valve seat bush 3 are kept in a sealing state under the condition of power failure and gas interruption of an application field during use;
in still other schemes, to facilitate monitoring of the position of the plunger, position sensing devices are mounted on the stroke of movement of the plunger, piston rod and piston. As shown in fig. 1, a first position switch bracket 19 is installed on one end wall of the cylinder, and a first position proximity switch 20 is installed on the bracket; a stroke indicating rod 22 is mounted on the other opposite end wall 21 of the cylinder, and a second position switch bracket 23 is mounted on the end wall 21 beside the stroke indicating rod and is provided with a second position proximity switch 24. The first position proximity switch and the second position proximity switch are connected to the control system. When the valve starts to move from the closed position, the plunger triggers the first position proximity switch 20, the first position proximity switch 18 outputs high voltage, when the piston moves to the initial position of the stroke indicating rod 22, the stroke indicating rod 22 triggers the first position proximity switch 24, and the second position proximity switch 16 outputs high voltage; the valve is closed from the maximum stroke, the piston is disengaged from the stroke indicating device, the stroke indicating device is restored to the initial position, the second position proximity switch 24 outputs a low voltage, the valve reaches the closed position, and the first position proximity switch 20 outputs a low voltage.
It should be noted that the protection scope of the present invention is not limited to the specific embodiments described in the above specific embodiments, but falls within the technical scope of the present invention as long as the combination of the technical features of the claims satisfies the present invention.

Claims (13)

1. The utility model provides a sweep type plunger valve of unloading for install at the material container discharge gate, control closing and opening of container discharge gate, its characterized in that includes:
the valve body (1), set up the work through hole axially in the valve body, the axial one end A of the valve body is used for connecting with said container discharge port of supplies, another end is end B, set up valve discharge port (7) and purge gas inlet (8) on the sidewall of the work through hole of the valve body, and the purge gas inlet locates at the area where the discharge port of the valve locates axially in the axial direction;
the gas inlet and outlet (12) are arranged at two axial ends of the cylinder, a first working hole is formed in one axial end of the cylinder, a guide piece (6) is arranged in the cylinder, one end of the guide piece is connected with the first working hole, the other end of the guide piece extends into the cylinder along the axial direction, and a second working hole is formed in the other end of the guide piece;
a plunger (2); a piston (4) and a piston rod (5);
the plunger (2) is movably arranged in the working through hole, one end of the plunger extends out of the end B, a wiping ring (9) is arranged between the plunger and the inner wall of the working through hole and is positioned between the purging gas inlet and the end B, and a sealing structure is arranged between the plunger and the working through hole;
the cylinder is arranged on the side of the end B of the valve body along the axial direction, a distance is reserved between the cylinder and the valve body, the piston is movably arranged in the cylinder to divide the cylinder into two axial cavities, one end of the piston rod is arranged on the piston, the other end of the piston rod penetrates through the second working hole, and the piston rod extends in the guide piece along the axial direction and is connected with the end part of the plunger extending end B;
the piston drives the piston rod and the piston to move axially under the driving of the air pressure difference of the cavities on the two sides, so that the plunger valve is closed and opened, in the closed state, the end A and the valve discharge port are closed by the plunger, in the process from closing to opening, one end of the plunger strides over the valve discharge port to open the valve discharge port, and the other end of the plunger penetrates through the first working hole and extends into the guide piece.
2. A purge-type discharge plug valve according to claim 1, wherein said wiper ring is transition fit with the plug.
3. A purge-type discharge plug valve according to claim 1, wherein the outer diameter of said plug is greater than the outer diameter of the piston rod.
4. A purge-type discharge plug valve according to claim 1, wherein a discharge barrel (18) is provided at the valve outlet, facing outwards, and is mounted obliquely with respect to the axial direction, with the outlet of the discharge barrel facing end B.
5. A purge-type discharge plug valve according to claim 1, wherein the purge gas inlet has a smaller bore than the valve material outlet, the purge gas inlet is diametrically opposed to the valve outlet, and the purge gas inlet is located in an axially central region of the valve outlet.
6. A sweeping type discharging plunger valve according to claim 1, characterized in that a valve body bush (17) is installed at the end a of the working through hole, and a conical surface sealing structure is arranged between the plunger and the valve seat bush.
7. A purge-type discharge plug valve according to claim 1, wherein a guide bush (13) is provided between the inner wall of the working through-hole and the plug, and the guide bush is located between the wiper ring and the B-end.
8. A purge-type discharge plug valve according to claim 1, wherein end B of the valve body is provided with a gland seal assembly (15) and the plug passes through the gland seal assembly.
9. A purge-type discharge plug valve according to claim 1, characterized in that the end B of the valve body is connected to the cylinder by means of a support bolt (16).
10. A purge-type discharge plug valve according to claim 1, further comprising a container connection block (31), through which the discharge valve is mounted at the discharge of the material container.
11. A purge-type discharge plug valve according to claim 1, further comprising a gas supply connected to the purge gas inlet and the gas inlet and outlet on the cylinder.
12. A purge-type discharge plug valve according to claim 11, wherein the gas supply means comprises a gas source (10) and a gas tank (11), the gas source being connected to the purge gas inlet through a valve, the gas source being connected to the gas tank through a one-way valve, the gas tank being connected to the two gas inlets and outlets through a valve set, respectively.
13. A purge-type discharge plug valve according to claim 1, wherein position sensing means are mounted on the plunger, piston rod and piston stroke.
CN202110702838.5A 2021-06-24 2021-06-24 Purging type discharging plunger valve Pending CN113374882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110702838.5A CN113374882A (en) 2021-06-24 2021-06-24 Purging type discharging plunger valve

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Application Number Priority Date Filing Date Title
CN202110702838.5A CN113374882A (en) 2021-06-24 2021-06-24 Purging type discharging plunger valve

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Publication Number Publication Date
CN113374882A true CN113374882A (en) 2021-09-10

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Application Number Title Priority Date Filing Date
CN202110702838.5A Pending CN113374882A (en) 2021-06-24 2021-06-24 Purging type discharging plunger valve

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JPS6059885U (en) * 1983-09-30 1985-04-25 アスカ工業株式会社 switching valve device
US20150136384A1 (en) * 2013-11-01 2015-05-21 Weatherford/Lamb, Inc. Wiper and seal assembly for a pump
CN105422968A (en) * 2015-12-21 2016-03-23 杭州江南控制阀有限公司 Pneumatic swing type open upward discharge valve
US9845801B1 (en) * 2012-01-03 2017-12-19 FAST Group-Houston, Inc. Header ring for reciprocating pump
CN111520489A (en) * 2020-04-29 2020-08-11 合肥通用机械研究院有限公司 Anti-eccentric pressure-bearing type solid discharge valve
CN212273090U (en) * 2020-04-24 2021-01-01 山东明化新材料有限公司 Discharging device for durene

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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