CN210600231U

CN210600231U - Non-rising stem flat valve without flange and bolted connection valve cover structure

Info

Publication number: CN210600231U
Application number: CN201920390313.0U
Authority: CN
Inventors: 潘成桃; 潘成涨; 曲德湖; 张崇海; 刘文修; 曹甲亮; 杨雄飞; 张维光; 张鹏
Original assignee: Lianggong Valve Group Co ltd
Current assignee: Lianggong Valve Group Co ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-05-22
Anticipated expiration: 2029-03-26

Abstract

The utility model discloses a no dark pole wafer valve of flange and bolted connection valve gap structure, including valve body, flashboard and drive arrangement, be equipped with inflow channel and outflow passageway on the valve body, be equipped with the valve pocket between inflow channel and the outflow passageway, be equipped with the flashboard in the valve pocket, the flashboard is close to inflow channel end and outflow passageway end and all is equipped with valve seat assembly, a serial communication port, the valve body constitutes complete airtight valve pocket by lower valve body and the valve gap that matches rather than the lower valve body, from compact form sealing device (4) be the lip, and its section shape is the structure of falling the U-shaped, forms by sealed outer lane (41) and sealed inner circle (42) stack combination, flashboard (9) up-and-down motion position department both sides are equipped with deflector (8) respectively, be equipped with strengthening rib (105) of a plurality of horizontal distribution designs in valve body (111) down, have advantages such as.

Description

Non-rising stem flat valve without flange and bolted connection valve cover structure

Technical Field

The utility model relates to the valve field, belonging to the fluid control general mechanical product, which is widely applied to pipeline fluid transportation and control in the industries of petroleum, chemical industry, natural gas and the like; in particular to a non-rising stem flat valve without a flange and a bolt connection valve cover structure.

Background

The classification of gate valve is categorised with the structure type of flashboard, mainly divide into wedge gate board and parallel flashboard two major types at present and be wedge gate valve and parallel flashboard valve (for short for flat valve), with the utility model discloses similar scheme bright pole or dark pole parallel gate valve have mainly valve body, valve gap, disk seat subassembly, parallel flashboard (take the water conservancy diversion hole or do not have the water conservancy diversion hole), valve rod and flashboard connecting piece (bright pole), sealed packing subassembly, valve gap support (bright pole), valve rod nut, switch hand wheel or valve operator and valve body valve gap connecting bolt etc. constitute between valve rod and valve gap. The valve body and the valve cover are formed by casting, the valve body is cylindrical or oblate cylindrical and is provided with a valve drift diameter connecting pipe and a connecting flange, the upper part of the valve body is provided with the connecting flange and the valve cover flange which are connected through bolts to form a closed valve cavity for containing internal parts such as a flashboard, a valve seat assembly and the like, the valve seat assembly is arranged at the inner end parts of the two connecting pipes in the valve cavity, the flashboard is arranged between the two valve seat assemblies, guide rails are cast at two sides of the cavity in the valve cavity to control the deviation of the opening and closing movement process of the flashboard, an open rod valve rod is connected with the flashboard through a connecting piece, a hidden rod is connected with the flashboard through a valve rod nut, the valve rod penetrates through the valve cover, sealing filler is arranged between the valve cover and the valve rod to ensure the sealing of the valve rod, a pair of valve seat, a hand wheel or a valve driver is sleeved in the valve rod nut to drive the valve rod nut to rotate anticlockwise or clockwise so that the valve rod is screwed in to drive the flashboard to move upwards (left-handed threads) to open the valve or move downwards to close the valve; the open-rod flat valve switching motion is that a valve rod nut rotates to drive a valve rod to be connected with a gate plate to do lifting motion, the valve rod does not rotate, the switching position of the valve can be displayed through the outer leaked valve rod lifting position, the blind-rod flat valve switching motion is that the valve rod rotates to drive the valve rod nut in a valve cavity to be connected with the gate plate to do lifting motion, the valve rod nut does not rotate, and the gate plate switching position of the valve cannot be displayed outside the valve.

① is complex in structure, a flange is arranged at the upper portion of a middle cavity of a valve body, a valve cover is also of a semi-cavity structure with the flange, a flange on the middle cavity of the valve body is in butt-press connection with a flange of the valve cover through a plurality of sets of bolts and nuts, sealing between the flanges is achieved through the forcing force of the bolts, leakage may occur between the flanges when bolts are not uniformly pre-tightened or loosened one by one, ② the upper flange of the middle cavity of the valve body and the flange of the valve cover are in plane butt-clamp connection, a matching positioning stop is not formed between the two flanges, alignment of upper and lower bolt hole positions is achieved during assembly, size deviation is large, intersection of a valve rod axis and a valve body pipeline, namely a through-diameter axis of a valve seat assembly cannot be guaranteed after assembly, deviation can affect centering performance of a flashboard and leakage of the valve rod due to eccentric wear, ③ limit guide slideways on two sides of the flashboard in the process of up-and down switching movement of the valve body are cast together with the valve body, and inaccurate casting guide rails cannot control down tolerance of a flashboard clearance, the flashboard clearance is large, size of the flashboard and the flashboard cannot be controlled by an external circle of a flashboard, the flashboard cannot be controlled by a blind-closed flashboard sealing component, and a blind-closed flashboard sealing component, the flashboard sealing gap of a flashboard is generally, the flashboard is generally, the flashboard is caused by the size of a blind-closed by the flashboard, the leak of a blind-.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a non-rising stem wafer valve of no flange and bolted connection valve gap structure to solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a non-rising stem flat valve without flange and bolt connection valve cover structure comprises a valve body, a gate plate and a driving device, wherein an inflow channel and an outflow channel are arranged on the valve body, a valve cavity is arranged between the inflow channel and the outflow channel, the gate plate is arranged in the valve cavity, the gate plate is provided with a valve seat component close to the inflow channel end and the outflow channel end, one end of a valve rod and a threaded port on the gate plate form a threaded connection structure, and the other end of the valve rod penetrates out of the valve body to be connected with the driving device through a screw rod indicating device, and the non-rising stem flat valve is characterized in that the valve body comprises a lower valve body and a valve cover matched with the lower valve body to form a complete closed valve cavity, wherein an upper port of the lower valve body connected with the valve cover is of a horizontal U-shaped lip structure, the lower valve body is of a long oblate cylinder shape, the top of, the boss positioning spigot is positioned in the center of the top surface of the gland contact table; the valve cover is arranged in the lip-shaped opening, the size of the outer edge of the valve cover is larger than that of the inner opening of the lip-shaped opening, the upper end surface of the outer edge of the valve cover is in contact with the inner bottom plane of the lip-shaped opening, a sealing ring is arranged at the contact position of the upper end surface and the inner bottom plane of the lip-shaped opening, and a concentric counter bore formed by a positioning disc positioning groove and; the positioning disc is arranged on the gland contact table through a set screw, the bottom of the positioning disc is provided with an end face positioning boss, the upper part of the positioning disc is provided with an indicator sleeve positioning boss, the center of the positioning disc is provided with a positioning disc valve rod hole and a bearing groove to form a concentric counter bore structure, the end face positioning boss is matched and positioned with the boss positioning spigot at the upper part of the lip shape of the lower valve body, the end face positioning boss is arranged in the positioning groove at the center of the valve cover, an outer sealing ring is arranged on the matched side surface of the end face positioning boss and the positioning groove, a self-tightening sealing device is arranged at the position of the end face, and simultaneously, the positioning disc and the valve cover are tightened and fixed through a set screw, so that the positioning boss on the bottom end surface of the positioning disc is inserted into the positioning groove in the center of the valve cover to be concentrically matched with the positioning groove, and the set screw is screwed tightly, so that the upper end surface of the outer edge of the valve cover is completely contacted with the inner bottom plane of the lip-shaped opening, and the valve body and the valve cover form a complete closed valve cavity.

By adopting the technical proposal, the upper opening of the valve body and the valve cover connection of the utility model is a horizontal U-shaped lip-shaped structure, the valve cover is both in a long and flat shape, the oblique side of the valve cover is required to shorten the projection dimension of the valve cover and narrow the projection dimension to be smaller than the dimension of the long and short axes of the lip-shaped inner opening of the valve body so as to be conveniently arranged at the lip-shaped opening of the valve body, the valve cover is arranged when the valve cover is wholly put into the inner cavity of the lip-shaped opening of the valve body, at the moment, the valve cover sealing ring and the lip-shaped self-tightening sealing ring are arranged in the outer edge sealing groove of the valve cover and the valve rod mounting hole part, the positioning disc is arranged in the inner hole positioning spigot of the upper part convex circle of the lip-shaped valve body and matched with the positioning boss of the end surface of the positioning disc, the O-shaped ring is arranged in the concentric inner hole and the, the upper end plane of the outer edge of the valve cover is in complete contact with the inner plane of the lip opening of the valve body, the valve cover sealing ring in the valve cover sealing groove is completely in a pre-tightening compression state, and the valve body and the valve cover form a complete closed valve cavity; because the utility model relates to a long oblate no flange and bolted connection valve gap structure's technical scheme is through as before the U word lip of crouching of the no flange in valve body upper end that matches is accomplished through the mode assemblage into a complete airtight valve pocket, the laminating sealing force between valve gap and valve body is not accomplished by bolt external force in the past, upwards pull up during the assembly valve gap and make its valve gap outer fringe up end plane and valve body lip mouth inner plane complete contact for the pretension screw, it is in pretension compression state to make the sealing washer in the valve gap seal groove, make it have initial sealing ability, and the required sealing force of during operation is realized by the medium pressure in the valve pocket, the sealing force strengthens along with the improvement of medium pressure.

As a further preferred aspect of the present invention, the self-tightening sealing device is a lip shape, and the cross-sectional shape thereof is an inverted U-shaped structure, and is formed by the combination of a sealing outer ring and a sealing inner ring, and the sealing outer ring is made of a non-metallic material, and is made of rubber or PTFE, and the sealing inner ring is a U-shaped metal sheet spring, so that the inner and outer lips of the self-tightening sealing device are always adhered to the valve rod and the outer hole wall.

Technical scheme more than adopting, the utility model relates to a its section shape of lip self-tightening sealing washer technical scheme for valve rod sealing is the shape of falling the U, lip outside material can be rubber or PTFE etc, the lip inboard is equipped with the U-shaped foil spring, spring action makes its inside and outside lip paste tight valve rod and outer hole wall all the time and guarantee the two sealed initial sealing power of side, medium pressure is higher from sealing force stronger more, the O shape circle of adorning is that dual fail-safe's prevention is sealed, this technical scheme is sealed reliable, the valve rod moment of torsion is little, it is sealed to replace the filler type.

As the utility model discloses further preferred scheme, the disk seat subassembly includes disk seat ring, first disk seat O type circle, second disk seat O type circle, sealing ring and elastomer, wherein, first disk seat O type circle, second disk seat O type circle set up on the lateral surface of disk seat ring, and the disk seat ring is close to the flashboard end and is equipped with the sealing ring, and the inflow passageway end and the outflow passageway end that are close to the valve body are equipped with a plurality of elastomer, elastomer one end is established in the disk seat inslot on the disk seat ring, and the other end contacts with the interior cavity wall of valve body, makes the sealing ring terminal surface paste all the time to the flashboard.

Technical scheme more than adopting, the utility model discloses between two disk seat subassemblies are put into to the disk seat subassembly at the flashboard, two disk seat subassemblies make the sealed terminal surface of disk seat paste all the time to the flashboard under the effect of a set of spring force of each afterbody, and the disk seat can remove along the passageway direction in the deformation range of spring, has the piston effect, promptly: along with the increase of the pressure of the pipeline medium, the specific sealing pressure between the valve seat and the gate plate is increased.

As a further preferred scheme of the utility model, flashboard up-and-down motion position department both sides are equipped with the deflector respectively, two the deflector body is installed respectively on lower valve body inner chamber upper and lower low reaches inflow channel and inflow channel flange location tang, and flashboard both sides limit and the fit clearance of deflector steerable within 0.5 mm.

Technical scheme more than adopting, the utility model relates to a flashboard deflector technical scheme replaces the casting guide rail that can not process in the past with the machined part guide rail, utilize modern panel beating technique to cut through laser cutting machine and numerical control bender to the steel sheet promptly and bend and take shape, the deflector of will bending is packed into on the valve body inner chamber of processing downstream side takeover flange location tang, flashboard both sides limit and the cooperation size precision of the deflector of bending are steerable within 0.5mm, can make the accurate up-and-down motion of flashboard, in addition, the horizontal edge of deflector also is the end off-position when the flashboard is closed down, when dextrorotation hand wheel closed the valve promptly, the flashboard is down, the bottom plane that the valve stem nut exceeds flashboard thickness part touches the deflector horizontal edge promptly the flashboard and closes and targets in place.

As a further preferred scheme of the present invention, the screw indicating device includes an indicating needle and an indicating needle sleeve, the upper section of the valve rod is further provided with an indicating thread, the indicating needle sleeve is sleeved on the upper section of the valve rod, an indicating groove is formed in the side surface of the indicating needle sleeve, the indicating groove is parallel to the valve rod, one end of the indicating needle is located in the indicating groove, the other end of the indicating needle is provided with an internal thread sleeve screwed on the indicating thread, and the indicating needle sleeve is fixed on the positioning plate through a fastening member; the lower section of the valve rod is provided with a working thread which is a trapezoidal thread, the indicating thread is a fine thread, and the thread pitch of the indicating thread is smaller than that of the working thread; and a lower bearing is arranged in a positioning boss hole of an indicator sleeve on the positioning disc and is fixed by a bearing gland, and a valve rod is driven by a rotary driving device to realize the movement of the flashboard to cut off the channel.

Technical scheme more than adopting, the utility model relates to an its principle of dark pole valve switch position indicator technical scheme is with the conversion of valve stroke distance and valve rod pitch, valve rod rotation number of turns multiplies the fine thread pitch that reduces in proportion when deriving to close or open the valve, with being greater than gained and shortening distance length at valve rod upper portion processing fine thread, and the nut of a band pointer of screw in, the switch proportional position with the flashboard apposition has been transferred, the slotted sleeve suit is done to valve rod proportion screw thread section to the reuse band pointer shows and prevents changeing, switch position groove mark, the fixed sleeve, with the very short distance accurate actual stroke distance and the switch position that the valve located of showing in proportion like this, the outer dimension height of valve increases limitedly.

As a further preferred scheme of the utility model, be equipped with the strengthening rib of a plurality of horizontal distribution designs in the lower valve body.

Technical scheme more than adopting, the utility model relates to a strengthening rib design technical scheme is from casting process and the smooth pleasing to the eye, the light and handy consideration of outward appearance set up the valve intracavity with the strengthening rib under the prerequisite that satisfies the intensity requirement, and overall dimension is compact on using, saves space.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

Fig. 1 is a first cross-sectional view of the present invention;

FIG. 2 is a second cross-sectional view of the present invention;

FIG. 3 is view A-A of FIG. 2;

FIG. 4 is a schematic view of a valve body;

FIG. 5 is a detail view of the gland;

FIG. 6 is a schematic view of a lip-type self-tightening seal;

FIG. 7 is a schematic view of a switch indicating device;

FIG. 8 is a front view of the valve seat assembly of the present invention;

FIG. 9 is a left side cross-sectional view of the valve seat assembly of the present invention;

FIG. 10 is a valve cover construction;

FIG. 11 is a schematic view of the structure of the guide plate;

in the figure: 1-valve body, 111-lower valve body, 102-boss positioning spigot, 103-lip mouth, 104-gland contact platform, 105-reinforcing rib, 2-valve cover, 201-positioning groove, 202-valve rod hole, 3-positioning disk, 301-end face positioning boss, 302-indicator sleeve positioning boss, 303-positioning disk valve rod hole and 304-bearing groove;

4-self-tightening sealing device, 5-outer sealing ring, 6-bearing, 7-sealing ring, 8-guide plate, 9-flashboard, 10-valve seat component, 1001-valve seat ring, 1002-first valve seat O-ring, 1003-second valve seat O-ring, 1004-sealing ring, 1005-elastomer, 11-valve rod, 1101-indicating thread, 1102-working thread, 12-screw rod indicating device, 121-indicating needle, 122-indicator sleeve, 13-driving device and 14-set screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Combine shown in fig. 1, 2, 4, 9, a dark pole plate valve of no flange and bolted connection valve gap structure, including valve body (1), flashboard (9) and drive arrangement (13), be equipped with inflow passageway and outflow passageway on valve body (1), be equipped with the valve pocket between inflow passageway and the outflow passageway, be equipped with flashboard (9) in the valve pocket, flashboard (9) are close to inflow passageway end and outflow passageway end and all are equipped with valve seat subassembly (10), and the screw thread mouth on valve rod (11) one end and the flashboard constitutes threaded connection structure, and the other end is worn out valve body (1) and is connected with drive arrangement (13) through screw rod indicating device (12), its characterized in that: the valve body (1) is a complete closed valve cavity formed by a lower valve body (111) and a valve cover (2) matched with the lower valve body, wherein an upper opening, connected with the valve cover (2), of the lower valve body (111) is of a horizontal U-shaped lip structure, the lower valve body (111) is of a long and flat cylindrical shape, a lip opening (103), a gland contact platform (104) and a boss positioning spigot (102) are arranged at the top of the lower valve body (111), the gland contact platform (104) is located in the center of the lip opening (103), and the boss positioning spigot (102) is located in the center of the top surface of the gland contact platform (104); the valve cover (2) is installed in the lip-shaped opening (103), the size of the outer edge of the valve cover (2) is larger than that of the inner opening of the lip-shaped opening (103), the upper end face of the outer edge of the valve cover (2) is in contact with the inner bottom plane of the lip-shaped opening (103), a sealing ring (7) is arranged at the contact position of the outer edge of the valve cover and the inner bottom plane of the lip-shaped opening (103), and a concentric counter bore formed by a positioning disc positioning groove (201) and a valve rod hole (; the positioning disc (3) is installed on a gland contact table (104) through a set screw (14), an end face positioning boss (301) is arranged at the bottom of the positioning disc (3), an indicator sleeve positioning boss (302) is arranged at the upper part of the positioning disc (3), a positioning disc valve rod hole (303) and a bearing groove (304) are arranged at the center of the positioning disc (3) to form a concentric counter bore structure, the end face positioning boss (301) is matched and matched with a boss positioning spigot (102) at the lip-shaped upper part of a lower valve body (111) to be positioned, the end face positioning boss (301) is installed in a positioning groove (201) at the center of the valve cover (2), an outer sealing ring (5) is arranged on the matched side face of the end face positioning boss (301) and the positioning groove (201), a self-tightening type sealing device (4) is arranged at the end face position, and the positioning disc (3) and the valve cover (2), the positioning boss (301) on the bottom end face of the positioning disc (3) is inserted into the positioning groove (201) in the center of the valve cover (2) to be concentrically matched with the positioning groove, and the fastening screw (14) is screwed to ensure that the upper end face of the outer edge of the valve cover (2) is completely contacted with the inner bottom plane of the lip-shaped opening (103), so that the valve body and the valve cover form a complete closed valve cavity.

In the embodiment, the upper opening of the valve body (1) connected with the valve cover (2) of the utility model is a horizontal U-shaped lip-shaped structure, the valve cover (2) is a long oblate-shaped structure, the valve cover (2) needs to be inclined to shorten the projection dimension of the valve cover (2) to be smaller than the dimension of the long and short axes in the lip-shaped opening (103) of the lower valve body (111) during assembly so as to be installed in the lip-shaped opening (103) of the lower valve body (111), the valve cover (2) is placed in the inner cavity of the lip-shaped opening (103) of the lower valve body (111) to be flat after being integrally arranged, a sealing ring (7) and a self-tightening sealing device (4) are installed in the outer edge sealing groove and the valve rod hole of the valve cover (2), a positioning disc (3) is installed in an inner hole positioning spigot (102) of the upper convex circle of the lip-shaped upper part of the lower valve body (111) to be matched with an upper end positioning boss (301) of the positioning disc (3), and an O-shaped ring is installed in a, screwing in a hexagon socket head cap fastening screw to fasten the positioning disc (3), horizontally pulling up the valve cover (2) to enable a positioning disc valve rod hole (303) at the bottom of the positioning disc (3) to be inserted into a valve rod hole (202) at the center of the valve cover (2) to be concentrically matched with the valve rod hole, screwing in the hexagon socket head cap fastening screw to enable the upper end plane of the outer edge of the valve cover (2) to be completely contacted with the inner plane of a lip-shaped opening (103) of the lower valve body (111), and enabling a sealing ring (7) in a sealing groove of the valve cover (2) to be completely in a pre-tightening compression state, wherein the valve body and the; because the utility model relates to a long oblate's no flange and bolted connection valve gap structure's technical scheme is through assembling into a complete airtight valve pocket with the valve body upper end that matches with it and realizes through as before the mode U word lip, the laminating sealing force between valve gap (2) and valve body (1) is not accomplished by bolt external force in the past, upwards lift valve gap (2) and make its valve gap (2) outer fringe upper end plane and lower valve body (111) lip (103) interior plane full contact with pretension screw during the assembly, it is in pretension compression state to make sealing washer (7) in valve gap (2) seal groove, make it have initial sealing ability, and required sealing force is realized by the medium pressure in the valve pocket when the during operation, the sealing force strengthens along with the improvement of medium pressure.

As shown in fig. 2 and fig. 6, in order to realize the replacement seal, the self-tightening seal device (4) is lip-shaped, the cross-sectional shape thereof is an inverted U-shaped structure, and the self-tightening seal device is formed by overlapping and combining a seal outer ring (41) and a seal inner ring (42), wherein the seal outer ring (41) is made of a non-metal material and is made of any one of rubber or PTFE, and the seal inner ring (42) is a U-shaped metal sheet spring, so that the inner lip and the outer lip of the self-tightening seal device are always attached to the valve rod and the outer hole wall; the technical scheme is that the section of the lip-shaped self-tightening sealing ring for sealing the valve rod is inverted U-shaped, the outer material of the lip-shaped sealing outer ring (41) can be rubber or PTFE (polytetrafluoroethylene) and the like, a U-shaped metal sheet spring is arranged on the inner side of the lip-shaped sealing inner ring (42), the inner lip and the outer lip of the lip-shaped self-tightening sealing ring are always tightly attached to the valve rod (11) and the outer hole wall under the action of the spring to ensure the initial sealing force of double-side sealing, the higher the medium pressure is, the stronger the self-sealing force is, the sealing reliability of the.

As shown in fig. 1 and 8, in order to achieve a zero-leakage sealing effect, the valve seat assembly (10) includes a valve seat ring (1001), a first valve seat O-ring (1002), a second valve seat O-ring (1003), a sealing ring (1004), and an elastic body (1005), wherein the first valve seat O-ring (1002) and the second valve seat O-ring (1003) are disposed on an outer side surface of the valve seat ring (1001), the sealing ring (1004) is disposed at an end of the valve seat ring (1001) close to the gate plate (9), a plurality of elastic bodies (1005) are disposed at an inflow channel end and an outflow channel end of the valve body (1), one end of each elastic body (1005) is disposed in a valve seat groove of the valve seat ring (1001), and the other end of each elastic body is in contact with an inner cavity wall of the valve body (1), so that an end surface; in this embodiment, between two valve seat components (10) are put into to flashboard (9), two valve seat components (10) make the valve seat sealing end face paste flashboard (9) all the time to clamping flashboard (9) under the spring force effect of a set of elastomer (1005) of each afterbody, and valve seat component (10) can move along the passageway direction in the deformation range of spring, has the piston effect, promptly: the specific sealing pressure between the valve seat assembly (10) and the gate plate (9) is increased along with the increase of the pressure of the pipeline medium.

Referring to fig. 2, 3 and 10, two sides of the up-and-down movement position of the gate plate (9) are respectively provided with a guide plate (8), two guide plates (8) are respectively arranged on an inflow channel and an inflow channel flange positioning spigot on the upper and lower stream of the inner cavity of the lower valve body (111), and the fit clearance between two side edges of the gate plate (9) and the guide plates (8) can be controlled within 0.5 mm. In the embodiment, a machined part guide rail replaces a traditional cast guide rail which cannot be machined, a steel plate is cut, bent and formed by utilizing a modern sheet metal technology through a laser cutting machine and a numerical control bending machine, a bent guide plate (8) is arranged on a flange positioning spigot of a connecting pipe on the upstream side and the downstream side of an inner cavity of a machined valve body (1), the precision of the matching size of two side edges of a flashboard (9) and the bent guide plate (8) can be controlled within 0.5mm, the flashboard (9) can accurately move up and down, in addition, the horizontal upper edge of the guide plate (8) is also a stopping position when the flashboard (9) is closed downwards, namely when a right-handed driving device (13) closes a valve, the flashboard (9) moves downwards, and simultaneously, the bottom plane of a part, growing out of the thickness of the flashboard, of a nut in the valve cavity touches the horizontal upper edge of the guide.

With reference to fig. 2 and 7, the screw indicating device (12) includes an indicating needle (121) and an indicating needle sleeve (122), an indicating thread (1101) is further disposed on an upper section of the valve rod (11), the indicating needle sleeve (122) is sleeved on the upper section of the valve rod (11), an indicating groove (1221) is disposed on a side surface of the indicating needle sleeve (122), the indicating groove (1221) is parallel to the valve rod (11), one end of the indicating needle (121) is located in the indicating groove (1221), an internal thread is disposed at the other end of the indicating needle (121) and is screwed on the indicating thread (1101), and the indicating needle sleeve (122) is fixed on the positioning plate (3) through a fastener; the lower section of the valve rod (11) is provided with a working thread (1102), the working thread (1102) is a trapezoidal thread, the indicating thread (1101) is a fine thread, and the thread pitch of the indicating thread (1101) is smaller than that of the working thread (1102); a lower bearing (6) is arranged in a hole of an indicator sleeve positioning boss (302) on the positioning disc (3) and is fixed by a bearing gland, and a valve rod (11) is driven by a rotary driving device (13) to realize that the flashboard (9) moves to cut off a channel; the principle of the embodiment is that the conversion of the valve stroke distance and the thread pitch of the valve rod (11) is used for obtaining the rotation number of the valve rod (11) multiplied by the thread pitch of the fine thread reduced in proportion when the valve is closed or opened, the fine thread is processed on the upper part of the valve rod by the length which is longer than the obtained shortened distance, the nut with the indicating needle (121) is screwed in, the switch proportion position which is in the same position with the flashboard (9) is adjusted, the indicating groove (1221) with the indicating needle (121) for displaying and preventing the open groove is sleeved on the proportion thread section of the valve rod (11), the mark of the switch position is marked, and the sleeve is fixed, so that the actual stroke distance of the valve and the switch position where the valve is located are accurately displayed in proportion by a short distance, and the increase of the external dimension.

As shown in FIG. 2, in order to meet the strength requirement, the lower valve body (111) is internally provided with a plurality of reinforcing ribs (105) which are horizontally distributed and designed, so that the outer dimension is compact and the space is saved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a no dark pole wafer valve of flange and bolted connection valve gap structure, includes valve body (1), flashboard (9) and drive arrangement (13), be equipped with inflow channel and outflow passageway on valve body (1), be equipped with the valve pocket between inflow channel and the outflow passageway, be equipped with flashboard (9) in the valve pocket, flashboard (9) are close to inflow passageway end and outflow passageway end and all are equipped with valve seat subassembly (10), and the screw thread mouth on valve rod (11) one end and the flashboard constitutes threaded connection structure, and the other end is worn out valve body (1) and is connected its characterized in that through screw rod indicating device (12) and drive arrangement (13): the valve body (1) is a complete closed valve cavity formed by a lower valve body (111) and a valve cover (2) matched with the lower valve body, wherein an upper opening, connected with the valve cover (2), of the lower valve body (111) is of a horizontal U-shaped lip structure, the lower valve body (111) is of a long and flat cylindrical shape, a lip opening (103), a gland contact platform (104) and a boss positioning spigot (102) are arranged at the top of the lower valve body (111), the gland contact platform (104) is located in the center of the lip opening (103), and the boss positioning spigot (102) is located in the center of the top surface of the gland contact platform (104);

the valve cover (2) is installed in the lip-shaped opening (103), the size of the outer edge of the valve cover (2) is larger than that of the inner opening of the lip-shaped opening (103), the upper end face of the outer edge of the valve cover (2) is in contact with the inner bottom plane of the lip-shaped opening (103), a sealing ring (7) is arranged at the contact position of the outer edge of the valve cover and the inner bottom plane of the lip-shaped opening (103), and a concentric counter bore formed by a positioning disc positioning groove (201) and a valve rod hole (;

the positioning disc (3) is installed on a gland contact table (104) through a set screw (14), an end face positioning boss (301) is arranged at the bottom of the positioning disc (3), an indicator sleeve positioning boss (302) is arranged at the upper part of the positioning disc (3), a positioning disc valve rod hole (303) and a bearing groove (304) are arranged at the center of the positioning disc (3) to form a concentric counter bore structure, the end face positioning boss (301) is matched and matched with a boss positioning spigot (102) at the lip-shaped upper part of a lower valve body (111) to be positioned, the end face positioning boss (301) is installed in a positioning groove (201) at the center of the valve cover (2), an outer sealing ring (5) is arranged on the matched side face of the end face positioning boss (301) and the positioning groove (201), a self-tightening type sealing device (4) is arranged at the end face position, and the positioning disc (3) and the valve cover (2), the positioning boss (301) on the bottom end face of the positioning disc (3) is inserted into the positioning groove (201) in the center of the valve cover (2) to be concentrically matched with the positioning groove, and the fastening screw (14) is screwed to ensure that the upper end face of the outer edge of the valve cover (2) is completely contacted with the inner bottom plane of the lip-shaped opening (103), so that the valve body and the valve cover form a complete closed valve cavity.

2. The dark rod flat valve without the flange and the bolt connection valve cover structure as claimed in claim 1, wherein the self-tightening type sealing device (4) is lip-shaped, the cross section shape thereof is an inverted U-shaped structure, the dark rod flat valve is formed by overlapping and combining a sealing outer ring (41) and a sealing inner ring (42), the sealing outer ring (41) is made of non-metal materials and is any one of rubber or PTFE, and the sealing inner ring (42) is a U-shaped metal sheet spring, so that the inner lip and the outer lip of the self-tightening type sealing device are always attached to the valve rod and the outer hole wall.

3. The dark rod flat valve without the flange and the bolt connection bonnet structure as claimed in claim 1, wherein the valve seat assembly (10) comprises a valve seat ring (1001), a first valve seat O-ring (1002), a second valve seat O-ring (1003), a sealing ring (1004) and an elastic body (1005), wherein the first valve seat O-ring (1002) and the second valve seat O-ring (1003) are arranged on the outer side surface of the valve seat ring (1001), the sealing ring (1004) is arranged at the end, close to the flashboard (9), of the valve seat ring (1001), a plurality of elastic bodies (1005) are arranged at the inflow channel end and the outflow channel end, close to the valve body (1), one end of each elastic body (1005) is arranged in a valve seat groove on the valve seat ring (1001), and the other end of each elastic body is in contact with the inner cavity wall of the valve body (1), so that the end surface of the sealing ring (1004.

4. The dark-rod flat valve without the flange and the bolted valve cover structure according to claim 1, characterized in that two sides of the up-and-down motion position of the gate plate (9) are respectively provided with a guide plate (8), two guide plates (8) are respectively arranged on the flange positioning rabbets of the inflow channel and the inflow channel on the upstream and downstream of the inner cavity of the lower valve body (111), and the fit clearance between two sides of the gate plate (9) and the guide plates (8) can be controlled within 0.5 mm.

5. The dark rod flat valve without the flange and the bolted valve cover structure according to claim 1, characterized in that, the screw rod indicating device (12) comprises an indicating needle (121) and an indicating needle sleeve (122), the upper section of the valve rod (11) is further provided with an indicating thread (1101), the indicating needle sleeve (122) is sleeved on the upper section of the valve rod (11), the side surface of the indicating needle sleeve (122) is provided with an indicating groove (1221), the indicating groove (1221) is parallel to the valve rod (11), one end of the indicating needle (121) is positioned in the indicating groove (1221), the other end of the indicating needle (121) is provided with an internal thread which is sleeved on the indicating thread (1101), and the indicating needle sleeve (122) is fixed on the positioning plate (3) through a fastener; the lower section of the valve rod (11) is provided with a working thread (1102), the working thread (1102) is a trapezoidal thread, the indicating thread (1101) is a fine thread, and the thread pitch of the indicating thread (1101) is smaller than that of the working thread (1102); and a lower bearing (6) is arranged in a hole of an indicator sleeve positioning boss (302) on the positioning disc (3) and is fixed by a bearing gland, and a valve rod (11) is driven by a rotary driving device (13), so that the shutter (9) moves to cut off the channel.

6. The non-rising stem flat valve without a flange and a bolt connection valve cover structure as claimed in claim 3, wherein: a plurality of reinforcing ribs (105) which are horizontally distributed are arranged in the lower valve body (111).