CN213711928U - Gate valve - Google Patents

Abstract

The utility model relates to a gate valve, which comprises a valve body, a flashboard, valve seats and a wear-resistant sleeve, wherein the valve body is internally provided with two medium runners, the two valve seats are arranged in the valve body at intervals in the axial direction of the medium runners and are provided with overflowing holes extending along the axial direction of the medium runners, and the flashboard is arranged on the valve body and can move between the two valve seats to shield and leave the overflowing holes; the wear-resisting cover is arranged in the medium flow channel, at the downstream of the flashboard and close to the flashboard, and is fixedly installed on the valve body or the valve seat, and the inner hole of the wear-resisting cover axially corresponds to the overflowing hole to allow the medium to flow through. The utility model discloses a gate valve, when the pressure differential of flashboard both sides is great in the valve body, the medium passes through and strikes disk seat and wear-resisting cover behind the flashboard, avoids the higher medium of velocity of flow directly to strike the valve body, and wear-resisting cover and disk seat have certain guard action to the valve body, and the valve body is not fragile, has prolonged the life of valve body, reduces the maintenance cost, and the economic nature of gate valve is better.

Description

Gate valve

Technical Field

The utility model relates to a gate valve.

Background

In the process of thick oil thermal recovery, steam is required to be injected into a well under certain conditions to reduce the viscosity of thick oil, steam is generally injected into a plurality of thick oil wells through a boiler, the steam is required to be injected into a single thick oil well, gate valves are required to be installed on pipelines to adjust the steam flow, each gate valve comprises a gate plate, a valve body and a valve seat, the gate plates radially extend into the valve body along the valve body, the valve seats are installed on the valve body and are used for being matched with the gate plates in a sealing mode, the valve body is provided with inflow ends and outflow ends on two sides of the gate plates respectively, throttling is achieved by adjusting the opening degree of the gate plates relative to the valve body, when the opening degree of the gate plates is small, a large pressure difference can be formed on two sides of the gate plates in the valve body, the steam enters the outflow ends at a large flow rate and impacts the valve body, the valve body is.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gate valve can solve the gate valve body among the prior art and damage easily, use the relatively poor problem of economic nature.

The utility model discloses a gate valve adopts following technical scheme:

a gate valve, comprising:

the valve body is internally provided with a medium flow passage;

the two valve seats are arranged in the valve body at intervals in the axial direction of the medium flow passage and are provided with overflowing holes extending along the axial direction of the medium flow passage;

the flashboard is arranged on the valve body and can move between the two valve seats to shield and leave the overflowing hole;

the wear-resisting sleeve is arranged in the medium flow channel, at the downstream of the flashboard and close to the flashboard, is fixedly installed on the valve body or the valve seat, and an inner hole of the wear-resisting sleeve axially corresponds to the overflowing hole and is used for allowing a medium to flow through.

Has the advantages that: the utility model discloses a gate valve, in the medium runner, be equipped with wear-resisting cover in the low reaches department of flashboard, when the aperture of the relative medium runner of flashboard is less, the medium passes through directly assault behind the flashboard to disk seat and wear-resisting sheathe in, avoids the valve body to receive the direct impact of medium rapidly, plays the effect of protection valve body, can prolong the life of valve body, reduces the maintenance cost of gate valve then, can solve the gate valve body among the prior art and damage easily, use the relatively poor problem of economic nature.

Furthermore, the wear-resistant sleeve is provided with a slow flow transition surface which gradually draws close to the inner wall of the medium flow channel in the medium flowing direction.

Has the advantages that: the slow flow transition surface has the functions of guiding and slowing flow relative to the medium, and can slow down the impact of the medium flowing from the inner hole of the wear-resistant sleeve to the inner wall of the medium flow channel on the valve body; the arrangement of the slow flow transition surface can also prevent the connection transition position of the wear-resistant sleeve and the inner wall of the medium flow channel from generating vortex or accumulating solid impurities.

Furthermore, the slow flow transition surface is a conical surface.

Has the advantages that: the conical surface is convenient to process, and the guiding effect is good.

Further, the valve body is provided with a mounting opening in the radial direction of the medium flow passage, the two valve seats are arranged in the valve body in a back-to-back mode after entering the medium flow passage through the mounting opening, and the flashboard is arranged between the two valve seats through the mounting opening.

Has the advantages that: the valve seat is installed in the valve body in the installation mode, so that the two valve seats and the flashboard are conveniently guaranteed to form a pressing fit, and the sealing fit of the valve seats and the flashboard is more reliable.

Furthermore, the medium flow channel is internally provided with mounting grooves for the valve seat to be axially mounted in at two axial sides of the mounting opening respectively.

Has the advantages that: the installation groove is arranged, so that the sealing matching area of the valve seat and the flashboard is increased as much as possible on the basis of ensuring the flow area of the overflowing hole in the valve seat.

Furthermore, the inner hole of the valve seat is a stepped hole, the small-diameter section forms an overflowing hole, and the large-diameter section is fixedly connected with the wear-resistant sleeve.

Has the advantages that: the sealing matching area of the valve seat and the flashboard is large, the wear-resistant sleeve is fixedly connected with the valve seat, and the connection matching structure of the wear-resistant sleeve and the valve seat is more convenient to process on the valve seat.

Furthermore, the annular step surface of the stepped hole is matched with the wear-resistant sleeve in a stop manner, and the diameter of one end, close to the overflowing hole, of the inner hole of the wear-resistant sleeve is equal to that of the overflowing hole.

Has the advantages that: the valve seat is connected with the wear-resistant sleeve compactly, and the overflowing hole is connected with the inner hole of the wear-resistant sleeve in a smooth transition mode, so that vortex or solid impurity deposition can be prevented from occurring when the medium flows through the overflowing hole.

Furthermore, wear-resisting cover is equipped with two, and two wear-resisting covers are located the both sides of medium runner internal flashboard respectively.

Has the advantages that: at the moment, the gate valve does not need to distinguish the inflow end and the outflow end of the valve body when in use, and the use is more convenient.

Further, the gate plate moves directly between the two valve seats.

Has the advantages that: when the flashboard is in direct-acting sealing fit with the two valve seats, the whole volume of the gate valve is smaller.

Further, the wear-resistant sleeve is installed on the valve seat in a threaded mode.

Has the advantages that: the threaded connection relation is reliable, and the wear-resistant sleeve is convenient to disassemble and assemble.

Drawings

Fig. 1 is a schematic structural view of a gate valve according to an embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

fig. 3 is a schematic structural view of a gate valve according to an embodiment 3 of the present invention;

in the figure: 1-a valve body; 2-valve seat; 3-a gate plate; 4-wear-resistant sleeve; 5-valve stem; 6-valve cover; 7-a valve stem seat; 8-pressing a cap on the valve rod; 9-valve stem nut; 91-positioning the convex ring; 10-a thrust bearing; 11-a hand wheel; 12-bearing press cap; 13-a rotation stop key; 14-a protective cap; 15-mounting port; 16-a cylindrical connection seat; 21-valve seat; 41-wear-resistant sleeve; 101-valve body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses a specific embodiment 1 of gate valve:

the utility model discloses a gate valve is shown as figure 1, explains at first the overall structure and the application method of this gate valve, and this gate valve mainly comprises valve body 1, disk seat 2, flashboard 3, wear-resisting cover 4, valve rod 5, valve gap 6, valve rod seat 7, valve rod pressure cap 8, valve rod nut 9, thrust bearing 10, hand wheel 11, bearing pressure cap 12, splines key 13 and helmet 14. The valve body 1 has a medium flow passage inside for the medium to flow through. The valve body 1 has openings at both axial ends of the medium flow passage for connecting the medium pipes, respectively. The valve seat 2 is provided with two, is installed in the valve body, and is distributed at intervals in the axial direction of the medium flow channel, and the valve seat 2 is provided with a flow passing hole for the medium to pass through and axially extend along the medium flow channel. The valve body 1 is provided with an installation opening 15 along the radial direction of the medium flow passage, and the flashboard 3 extends into the valve body 1 through the installation opening 15 and can move between the two valve seats 2 along the radial direction of the medium flow passage. The radial gate plate hole that is equipped with along the medium runner on the flashboard 3, in the straight-moving stroke of flashboard 3, flashboard 3 shelters from or lets out the discharge orifice, plays the effect of medium flow in the regulation gate valve then.

The valve body 1 is provided with a cylindrical connecting seat 16 which extends along the radial direction of the medium flow channel on the outer side of the mounting opening 15, the cylindrical connecting seat 16 is connected with a valve cover 6 through threads, a valve cover hole for the valve rod 5 to penetrate through the valve cover 6 and the cylindrical connecting seat 16 is arranged on the valve cover 6, and the valve rod 5 extends along the radial direction of the medium flow channel and is fixedly connected with the flashboard 3 extending into the mounting opening 15. As shown in fig. 2, the valve stem 5 and the shutter 3 are fixedly connected by being embedded. The upper end of the valve cover 6 is in threaded connection with a valve rod seat 7, the valve rod seat 7 is of a cylindrical structure, and the valve rod 5 sequentially penetrates through the valve rod seat 7 and the valve cover 6 and then extends into a cylindrical connecting seat 16 to be connected with the flashboard 3.

The upper end of the valve rod seat 7 is provided with a force application mechanism which is used for applying force to the valve rod 5 to enable the valve rod 5 to move along the radial direction of the medium flow channel, and the force application mechanism comprises a hand wheel 11, a valve rod nut 9, a rotation stop key 13 and a thrust bearing 10. The upper end of the valve rod 5 is provided with a trapezoidal thread, and the valve rod nut 9 is sleeved outside the valve rod 5 and is in transmission fit with the valve rod 5 through the trapezoidal thread. The stem nut 9 is provided with a positioning convex ring 91 which protrudes outwards in the radial direction, and the stem nut 9 is positioned between the valve stem 5 and the valve stem seat 7 in the radial direction of the valve stem 5. A limiting step which protrudes inwards along the radial direction of the valve rod seat is arranged below the valve rod nut 9 in the valve rod seat 7, a bearing pressing cap 12 is connected above the valve rod nut 9 in a threaded manner, and the position of the positioning convex ring 91 on the valve rod nut 9 in the axial direction of the valve rod 5 is limited by the limiting step and the bearing pressing cap 12, so that the position of the valve rod nut 9 in the axial direction of the valve rod 5 is relatively fixed. The upper end of the valve rod nut 9 is in rotation stopping fit with the hand wheel 11 through a rotation stopping key 13 and can rotate together with the hand wheel 11. In order to make the valve rod nut 9 rotate smoothly and the hand wheel 11 operate with less labor, the valve rod seat 7 is provided with thrust bearings 10 which are sleeved outside the valve rod nut 9 and are respectively positioned at the upper side and the lower side of the positioning convex ring 91.

When the gate valve is used, the valve rod nut 9 can be rotated together by rotating the hand wheel 11, and the valve rod nut 9 is relatively fixed at the axial position of the valve rod 5, so that the valve rod 5 is axially and directly moved under the transmission action of the trapezoidal threads, and then the gate plate 3 is driven to radially and directly move along a medium flow channel, thereby playing the role of adjusting the medium flow in the gate valve.

In addition, in order to prevent the leakage at the connection position of each element on the gate valve, a plurality of connection positions are provided with sealing rings for making the connection positions fit more closely and preventing the leakage of the medium from the connection positions, wherein a bonnet sealing ring is provided above the threaded connection position between the cylindrical connection seat 16 and the bonnet 6, and the bonnet sealing ring is located at the upstream of the threaded connection position between the bonnet 6 and the valve body 1 along the path extending outwards from the contact fit position between the bonnet 6 and the valve body 1. Besides, at the penetrating and assembling matching positions of the valve cover 6 and the valve rod 5, a plurality of valve rod sealing rings which are radially positioned between the valve cover 6 and the valve rod 5 are arranged in the valve cover hole, a valve rod pressing cap 8 is arranged above the valve rod sealing rings to prevent the valve rod sealing rings from moving upwards to be separated from the valve cover hole, and the valve rod pressing cap 8 is fixed in the valve cover hole through threaded connection. In addition, a protective cap 14 for limiting the linear movement distance of the valve rod 5 is arranged above the hand wheel, and the protective cap 14 is fixed on the valve rod nut 9 through threads.

For solving the gate valve among the prior art the valve body that the gate valve aperture produced easily punctures, the serious problem of wearing and tearing, the utility model discloses make optimization improvement on prior art's gate valve basis, set up the wear-resisting cover 4 that is used for playing the guard action to valve body 1 among the valve body 1, wear-resisting cover 4 is equipped with two, installs on the disk seat 2 of 3 both sides of flashboard and is close to 3 settings of flashboard, and the hole on the wear-resisting cover 4 corresponds the setting with the discharge orifice axial on the disk seat 4 for the confession medium passes through. After the wear-resistant sleeve is arranged, the rapid medium at the flashboard 3 can directly impact the valve seat 2 and the wear-resistant sleeve 4, so that the impact on the valve body 1 is reduced. In addition, the wear-resistant sleeve 4 is provided with a slow flow transition surface which is used for guiding flow and reducing the flowing speed of a medium on the side far away from the flashboard 4, the slow flow transition surface is a conical surface, when the wear-resistant sleeve is positioned on the downstream side of the flashboard, the conical surface on the wear-resistant sleeve extends to the inner wall of the medium flow channel along the flowing direction of the medium, the inner diameter of the inner hole of the wear-resistant sleeve is increased along the flowing direction of the medium, the speed of the medium flowing to the valve body through the inner hole of the wear-resistant sleeve can be reduced, the guiding and slow flow effects are achieved, and the impact effect of the. In addition, the setting of slow flow transition face can also prevent that wear-resisting cover and medium runner inner wall from being connected transition department and producing vortex or solid impurity and piling up.

In this embodiment, for making things convenient for the gate valve to use, all be equipped with wear-resisting cover 4 in the both sides of flashboard 3 in valve body 1. The gate valve is very convenient to use, and the inflow direction and the outflow direction of the valve body do not need to be distinguished. Of course, in other embodiments, the wear-resistant sleeve may be only disposed on one side of the cover plate in the valve body, and at this time, only the mark indicating the medium flow direction in the valve body needs to be disposed on the outer side of the valve body.

The utility model discloses a wear-resisting cover 4 of gate valve and the concrete structure and the installation as follows of disk seat 2: the two valve seats are oppositely arranged in the mounting grooves, after the valve seats 2 and the flashboards 3 are mounted, the axial annular groove walls of the mounting grooves have a stopping function on the valve seats 2 in the axial direction of the medium flow passage, so that the two valve seats 2 are tightly pressed and matched with the flashboards 3 clamped between the two valve seats.

The overflowing hole in the valve seat 2 is a step hole which is divided into a large-diameter section and a small-diameter section, one end of the small-diameter section is close to the flashboard 3, and the end face of the small-diameter section is used for being matched with two side faces of the flashboard 3 in a sealing mode. The inner wall of the large-diameter section is provided with internal threads, the outer side of the wear-resistant sleeve 4 is provided with corresponding external threads, the wear-resistant sleeve 4 is inserted into the large-diameter section in a threaded manner, the end face of one end, close to the valve seat 2, of the wear-resistant sleeve 4 is in stop fit with the annular step face of the step hole, and the small-diameter section forms an overflowing hole for a medium to pass through. When wear-resisting cover 4 installation targets in place, for preventing that wear-resisting cover hole and path section internal diameter from not matching, leading to the medium to form the vortex and produce impurity and pile up in the connection cooperation department of wear-resisting cover and disk seat, wear-resisting cover internal hole is close to the isodiametric such as discharge orifice one end and path section to realize smooth transition in the connection cooperation department of wear-resisting cover and disk seat, be favorable to the medium circulation. When the wear-resistant sleeve 4 is installed, the wear-resistant sleeve 4 enters the medium flow channel from openings at two ends, which are used for being connected with the medium pipeline, on the valve body 1, the wear-resistant sleeve 4 is in threaded connection with the valve seat 2, and when the wear-resistant sleeve 4 is in stop fit with the annular step surface of the step hole and the wear-resistant sleeve 4 cannot be screwed in along the axial direction of the medium flow channel, the wear-resistant sleeve 4 is installed in place.

The utility model provides a wear-resisting cover 4, disk seat 2 and flashboard 3 all comprise corrosion-resistant carbide steel material, and corrosion resistance and impact resistance are better when using, and are comparatively durable.

The utility model discloses a gate valve, in order to solve the impaling problem of valve body, set up the wear-resisting cover with protective action in the valve body inside, and further set up the special construction of wear-resisting cover namely slow flow transition face, make the medium speed of circulating to the valve body through the inner hole of wear-resisting cover slow down, reduce the impact action of medium to the valve body; furthermore, the installation and matching relation of the wear-resistant sleeve and the valve seat is ingenious, the wear-resistant sleeve is inserted into the valve seat through threads, the wear-resistant sleeve is convenient to assemble and disassemble, and the inner hole and the overflowing hole of the wear-resistant sleeve form smooth transition, so that the medium circulation is facilitated.

The utility model discloses a specific embodiment 2 of gate valve:

unlike embodiment 1, the transition surface of the slow flow is a curved surface.

The utility model discloses a specific embodiment 3 of gate valve:

different from embodiment 1, as shown in fig. 3, a mounting groove is not provided in the medium flow passage of the valve body 101, the valve seat 21 is welded and fixed to the inner wall surface of the medium flow passage, the valve seat 21 is a stepped ring structure, the overflowing hole in the stepped ring is arranged in an equal diameter manner along the axial direction, the stepped ring includes a large outer diameter section and a small outer diameter section, the end surface of one end of the large outer diameter section is used for being in sealing fit with the gate plate, and an external thread is provided on the outer circumferential surface of the small outer diameter section. Correspondingly, a step hole is formed in the wear-resistant sleeve 41, the step hole comprises a large inner diameter section and a small inner diameter section, an external thread matched with the small outer diameter section is arranged on the inner wall of the large inner diameter section, the wear-resistant sleeve 41 is sleeved on the valve seat 21 through a thread, after the wear-resistant sleeve is installed in place, the step ring is in stop fit with the step surface of the step hole, the overflowing hole in the step ring is equal in diameter to the small diameter section of the step hole, and the connecting and matching position between the wear-resistant sleeve 41 and the valve seat 21 forms smooth transition after the wear-resistant sleeve 41 is installed on the. When the valve seat 21 in this embodiment is installed, the medium flow path can be entered through the openings at both ends of the valve body 101 for connection with the medium pipe.

In other embodiments, on the basis of the technical solution of specific embodiment 3, a slow flow transition surface extending to the inner wall of the medium flow passage along a direction away from the gate plate 3 is disposed at one end of the small inner diameter section of the wear-resistant sleeve, and the slow flow transition surface is a conical surface.

The utility model discloses a specific embodiment 4 of gate valve:

the difference with embodiment 1 is that, be equipped with the through-hole of radial setting on the major diameter section of valve body and disk seat, be equipped with corresponding screw hole on the wear-resisting cover, wear-resisting cover fixed mounting can be on the disk seat through wearing the screw in proper order in the screw hole of valve body, disk seat and wear-resisting cover, and the screw is sealed with the valve body and is cooperated in order to prevent that the medium in the valve body from leaking from the screw hole.

The utility model discloses a specific embodiment 5 of gate valve:

the difference with embodiment 1 is that wear-resisting cover and disk seat all are the ring structure, and wear-resisting cover screw thread is installed on medium runner inner wall, and the disk seat is installed in the mounting groove, keeps away from the terminal surface of flashboard one end and stops the cooperation with wear-resisting cover on the disk seat, and wear-resisting cover hole is the taper hole, and the less one end of hole internal diameter docks the discharge orifice, and the less one end of wear-resisting cover internal diameter equals the diameter with the discharge orifice, and the pore wall of wear-resisting cover internal diameter constitutes the unhurried.

The utility model discloses a specific embodiment 6 of gate valve:

different from the embodiment 1, the outer peripheral surface of the wear-resistant sleeve is provided with external threads, and the wear-resistant sleeve is in threaded connection with the inner wall of the medium flow channel.

The utility model discloses a specific embodiment 7 of gate valve:

different from embodiment 1, the gate plate of the gate valve in this embodiment swings in a plane perpendicular to the axial direction of the medium flow channel, for example, in the swing gate valve disclosed in the chinese utility model patent document with the publication number CN202040356U, the gate valve in this embodiment is based on the above swing gate valve, a valve seat hermetically fitted with the gate plate is provided at the sealing end of both sides of the gate plate, and a wear-resistant sleeve is installed in the medium outflow channel on one side of the gate plate, and the wear-resistant sleeve is installed on the inner wall of the medium outflow channel through a thread.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A gate valve, comprising:

the valve body is internally provided with a medium flow passage;

the two valve seats are arranged in the valve body at intervals in the axial direction of the medium flow passage and are provided with overflowing holes extending along the axial direction of the medium flow passage;

the flashboard is arranged on the valve body and can move between the two valve seats to shield and leave the overflowing hole;

characterized by, the gate valve still includes:

the wear-resisting sleeve is arranged in the medium flow channel, at the downstream of the flashboard and close to the flashboard, is fixedly installed on the valve body or the valve seat, and an inner hole of the wear-resisting sleeve axially corresponds to the overflowing hole and is used for allowing a medium to flow through.

2. The gate valve of claim 1, wherein the wear sleeve has a transition surface gradually approaching the inner wall of the medium flow passage in the direction of medium flow.

3. The gate valve of claim 2 wherein the slow flow transition surface is a tapered surface.

4. A gate valve according to any one of claims 1-3, characterized in that the valve body is provided with a mounting opening in the radial direction of the medium flow channel, that the two valve seats are mounted in the valve body opposite to each other after entering the medium flow channel through the mounting opening, and that the gate plate is mounted between the two valve seats through the mounting opening.

5. The gate valve according to claim 4, wherein the medium flow passage is provided with mounting grooves for axially mounting the valve seat therein at both axial sides of the mounting opening, respectively.

6. The gate valve of any one of claims 1 to 3, wherein the inner bore of the valve seat is a stepped bore, the smaller diameter section forms an overflow bore, and the larger diameter section is fixedly connected to the wear sleeve.

7. The gate valve of claim 6 wherein the annular step surface of the stepped bore is in retaining engagement with the wear sleeve, the bore of the wear sleeve being of equal diameter to the flow bore adjacent the flow bore.

8. A gate valve according to any one of claims 1 to 3 wherein there are two wear sleeves, one on each side of the gate plate in the media flow path.

9. A gate valve according to any one of claims 1 to 3 wherein the gate plate is linearly movable between the valve seats.

10. A gate valve according to any of claims 1 to 3, characterised in that the wear sleeve is threadedly mounted on the valve seat.

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