CN216666527U - Drainage valve at tail end of pipeline - Google Patents

Abstract

The utility model provides a drain valve at the tail end of a pipeline, which comprises a valve body, wherein two ends of the valve body are respectively provided with an opening, one end of the valve body is connected with a connecting flange, one side of the connecting flange is connected with a pipeline anti-falling connecting assembly, the end surface of one end of the valve body, which is far away from the connecting flange, is an inclined surface, the upper part of one end of the valve body, which is far away from the connecting flange, is fixedly connected or integrally connected with a support, a gravity cover which is propped against the inclined surface is rotatably connected onto the support, and an air spring which is rotatably connected onto the support is rotatably connected onto the gravity cover. Through set up the inclined plane on the valve body and rotate and connect the gravity lid, usable gravity realizes the closure, utilizes water pressure to realize the drainage, and the cost is lower relatively and it is comparatively convenient to use, simultaneously through setting up the air spring, can avoid accomplishing the gravity lid in the twinkling of an eye of drainage patting fast under the action of gravity on the valve body, and difficult damage gravity lid, sound are less relatively and life is higher relatively.

Description

Drainage valve at tail end of pipeline

Technical Field

The utility model relates to a drain valve, in particular to a drain valve at the tail end of a pipeline.

Background

The tail end of the sewage pipe is usually provided with a drain valve to avoid sewage backflow, and the conventional drain valve is usually controlled electrically or manually, so that the cost of the conventional drain valve is relatively high, and the use of the conventional drain valve is inconvenient.

Chinese patent application publication No. CN1171509A discloses a drainage check valve, which utilizes gravity to close and utilizes water pressure to drain, and has relatively low cost and convenient use. However, when the sewage drained, the valve plate of the sewage draining device can flap on the valve seat under the action of gravity, so that large noise can be generated, the valve plate and the sealing structure are easy to damage, and the service life is influenced.

In view of the above, the applicant has made intensive studies to solve the above problems and has made the present invention.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the drain valve which is relatively low in cost, relatively convenient to use, relatively low in noise and relatively long in service life.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a terminal drain valve of pipeline, including the valve body that has the hole, the both ends of valve body seted up respectively with the opening of hole intercommunication, the one end of valve body is connected with flange, flange keeps away from one side of valve body is connected with pipeline anticreep coupling assembling, flange with be provided with seal structure between the valve body, the valve body is kept away from the terminal surface of flange's one end is from last down toward keeping away from gradually flange's direction slope arranges the inclined plane, just the valve body is kept away from the upper portion fixed connection or the body coupling of flange's one end have a support, it is in to rotate to be connected with to support on the support gravity lid on the inclined plane, gravity is covered to rotate to be connected with simultaneously and rotates to be connected air spring on the support.

As an improvement of the present invention, a sealing groove disposed around the corresponding opening is disposed on the inclined surface, a sealing ring is disposed in the sealing groove, and the gravity cover abuts against the sealing ring.

As an improvement of the utility model, one end of the valve body facing the connecting flange is provided with a counter bore which is coaxially arranged with the inner bore, a sealing ring which is propped against the connecting flange is arranged in the counter bore, the bottom surface of the counter bore is an inclined guide surface of which the diameter or the outline diameter is gradually reduced from one end which is relatively close to the connecting flange to the other end, and the valve body and the connecting flange and the pipeline anti-falling connecting assembly are fixedly connected through bolt connecting structures respectively.

As an improvement of the utility model, the pipeline anti-drop connecting assembly comprises a gland, the gland is provided with a through hole, the inner side wall of the through hole is provided with an inclined guide surface, the diameter or the outline diameter of the inclined guide surface is gradually reduced from one end of the through hole to the other end, an anti-drop ring is arranged in the through hole, and a plurality of adjusting blocks which are wound by taking the axis of the gland as the center are arranged between the anti-drop ring and the gland;

the anti-drop ring is an annular ring body, and the outer side wall of the ring body is provided with an inclined pushing surface of which the diameter or the profile diameter is gradually reduced from one axial end of the anti-drop ring to the other axial end;

or the anti-drop ring comprises a plurality of anti-drop blocks which are arranged in one-to-one correspondence with the adjusting blocks, and one side of each anti-drop block, which is far away from the gland, is provided with an inclined pushing surface which is arranged in an inclined manner from one axial end of the anti-drop ring to the other axial end of the anti-drop ring in a direction of gradually far away from the gland;

the inclined direction of the inclined guide surface and the inclined pushing surface relative to the axis of the gland is the same, one side of the adjusting block, facing the gland, is provided with an outer inclined surface abutting against the inclined guide surface, and one side of the adjusting block, facing the anti-falling ring, is provided with an inner inclined surface abutting against the inclined pushing surface.

As an improvement of the utility model, a positioning block is further arranged on one side of the adjusting block facing the anti-drop ring, and a plurality of positioning grooves which are matched with the positioning holes in a one-to-one manner are formed on one side of the ring body or one side of each anti-drop block facing the gland.

As an improvement of the utility model, a connecting unit is arranged between two adjacent adjusting blocks and/or between two adjacent anti-dropping blocks.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. through set up the inclined plane on the valve body and rotate and connect the gravity lid, usable gravity realizes the closure, utilizes water pressure to realize the drainage, and the cost is lower relatively and it is comparatively convenient to use, simultaneously through setting up the air spring, can avoid accomplishing the gravity lid in the twinkling of an eye of drainage patting fast under the action of gravity on the valve body, and difficult damage gravity lid, sound are less relatively and life is higher relatively.

2. Through set up the regulating block between anticreep circle and gland, only need to change anticreep circle and regulating block and can be applicable to the pipe connection of different diameters, and the gland can be with the pipeline looks adaptation of multiple different diameters, and required fund and warehouse space are all less relatively when backup pipeline anticreep coupling assembling, help reducing the pipeline maintenance cost.

3. Through setting up the linkage unit, help improving the coupling speed of pipeline anticreep coupling assembling on the pipeline.

Drawings

Fig. 1 is a schematic structural view of a pipeline anti-drop connection assembly according to an embodiment;

fig. 2 is an exploded schematic view of a pipeline anti-drop connection assembly according to an embodiment;

fig. 3 is a schematic structural view of the pipe anti-drop connection assembly according to the second embodiment;

fig. 4 is a schematic structural view of the pipe anti-drop connection assembly in the third embodiment;

fig. 5 is a schematic structural view of a pipeline anti-drop connection assembly in the fourth embodiment;

fig. 6 is a partial schematic structural view of an anti-drop ring of the pipeline anti-drop connection assembly according to the fourth embodiment;

fig. 7 is a schematic view of a partial cutaway structure of the pipe anti-drop connection assembly in the fourth embodiment;

fig. 8 is a schematic structural view of a fifth embodiment of the pipe anti-drop connection assembly;

fig. 9 is a schematic structural view of a pipeline anti-drop connection assembly in the sixth embodiment;

fig. 10 is a schematic partial sectional structure view of the pipe anti-drop connection assembly in the sixth embodiment.

FIG. 11 is a schematic view showing a configuration of a drain valve at the end of a pipe in the seventh embodiment, partially exploded;

fig. 12 is a schematic view of a partial cut-away structure of a drain valve at the end of a pipeline at the position of the pipeline anti-drop connection assembly in the seventh embodiment.

Bolts and/or nuts are omitted from part of the schematic drawings, and the marks in the drawings correspond to the following:

10-pressing cover; 11-perforating;

12-inclined guide surfaces; 13-a lug;

14-a limit chute; 15-a second connection hole;

20-anti-drop ring; 21-inclined pushing surface;

22-thread drop prevention; 23-a positioning groove;

24-pre-tightening the threaded hole; 25-an anti-drop block;

30-an adjusting block; 31-outer bevel;

32-inner slope; 33-positioning blocks;

34-a first connection aperture; 40-pre-tightening the bolt;

50-a linking unit; 51-strip shaped holes;

60-a valve body; 61-a first nut;

62-a second nut; 63-a third nut;

70-a connecting flange; 71-sealing ring;

72-a first male ring; 73-a second bulge loop;

80-a pipeline anti-drop connecting assembly; 90-gravity lid;

91-a support; 92-gas spring.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

The first embodiment.

As shown in fig. 1-2, the present embodiment provides a pipe drop-preventing connection assembly, which includes a gland 10, the gland 10 has a through hole 11, an inner side wall of the through hole 11 has a tapered surface 12, the diameter (when the cross section of the through hole is circular) or the profile diameter (when the cross section of the through hole is non-circular) of which gradually decreases from one end of the through hole 11 to the other end, in the present embodiment, the cross section of the through hole 11 is circular. A slip-off preventing ring 20 is arranged in the through hole 11, and a plurality of adjusting blocks 30 which are wound around the axis of the gland 10 are arranged between the slip-off preventing ring 20 and the gland 10. In use, the tubing is inserted through the anti-slip ring 20.

The outer periphery of the gland 10 is provided with a plurality of lugs 13 uniformly distributed around the axis of the gland 10, and the lugs 13 are provided with threaded holes or through holes so that the gland 10 can be fixedly connected to a pipe joint or a pipe flange by bolts arranged in parallel with the gland 10. The structure of the lug 13 and the specific connection structure between the lug and the pipe joint or the pipe flange are the same as the corresponding structure of the conventional pipe anti-drop connection assembly, and are not the focus of the embodiment, and are not described in detail herein.

Preferably, the inner side wall of the through hole 11 of the gland 10 is provided with a limiting sliding groove 14 which is matched with each adjusting block 30 one to one, and each adjusting block 30 is slidably connected in the corresponding limiting sliding groove 14 one to one, so that the adjusting block 30 is prevented from generating position deviation in the circumferential direction relative to the gland 10 during use. Of course, the bottom surface of the position-limiting sliding groove 14 is also provided with an inclined guide surface 12 so as to press the retainer ring 20 having an outer diameter matching the inner diameter of the gland 10 even when the adjusting block 30 is not used.

The anti-slip ring 20 may be a conventional anti-slip ring, for example, a resilient metal pressing ring used in a flange double-layer anti-slip joint is disclosed in the chinese utility model with the publication number CN 206831008U. In this embodiment, the anti-slip ring 20 is an annular ring body, an outer side wall of the ring body has an inclined pushing surface 21 whose diameter or contour diameter gradually decreases from one end of the anti-slip ring in the axial direction to the other end, an anti-slip pattern 22 is disposed on an inner side wall of the anti-slip ring 20 (i.e., the anti-slip pattern 22 is disposed on a side of the ring body away from the gland 10), and if necessary, at least one notch may be opened on the anti-slip ring 20 to increase its elastic deformation capability. When the anti-loose ring 20 is compressed, its inner diameter will be slightly smaller than when it is not compressed, i.e. it is reduced by the width of the slot. Further, the inclined guide surface 12 and the inclined push surface 21 are inclined in the same direction with respect to the axis of the gland 10.

The adjusting blocks 30 have the same structure, and taking one of the adjusting blocks 30 as an example, one side of the adjusting block 30 facing the gland 10 is provided with an outer inclined surface 31 abutting against the inclined guide surface 12, and one side of the adjusting block 30 facing the anti-drop ring 20 is provided with an inner inclined surface 32 abutting against the inclined push surface 21. Like this, when gland 30 is locked on the pipeline by the bolt, it can move towards the locking direction under the drive of bolt, promotes regulating block 30 and pushes tightly on anticreep circle 20 when promoting regulating block 30 to remove along the axis direction of gland 30 for anticreep circle 20 hugs closely on the pipeline, realizes the anticreep.

Preferably, a positioning block 33 is further disposed on a side of the adjusting block 30 facing the anti-slip ring 20, and a plurality of positioning grooves 23 are formed on a side of the ring body facing the gland 10, the positioning grooves being in one-to-one fit with the positioning blocks 33 on the adjusting block 30, so as to avoid a position deviation of the adjusting block 30 relative to the anti-slip ring 20 in a circumferential direction or an axial direction during use, and to better transmit a pressure of the gland 30 to the anti-slip ring 20.

In order to improve the installation efficiency in use and avoid placing the adjusting blocks 30 at corresponding positions one by one in use, the following structure can be adopted: the adjusting block 30 is provided with a pre-tightening threaded hole, the gland 10 is provided with a plurality of connecting holes which are coaxially arranged with the fastening threaded holes, and pre-tightening bolts which are spirally connected to the corresponding fastening threaded holes are respectively inserted into the connecting holes, so that the adjusting block 30 can be fastened on the gland 10 by the pre-tightening bolts before use, and then the whole body is sleeved on the pipeline, of course, before the gland 10 is locked on the pipeline, the pre-tightening bolts need to be taken out firstly, so that the problem that the anti-falling effect cannot be influenced by the fact that the adjusting block 30 slides axially relative to the gland 10 is avoided. Preferably, in this embodiment, the adjusting block 30 is provided with a first connecting hole 34, the gland 10 is provided with a plurality of second connecting holes 15 coaxially arranged with a pair of the first connecting holes 34, the ring body is provided with a pre-tightening threaded hole 24 coaxially arranged with a pair of the first connecting holes 34, a pre-tightening bolt 40 spirally connected to the corresponding fastening threaded hole 23 is inserted into each first connecting hole, and each pre-tightening bolt 40 is inserted into the corresponding second connecting hole 15 at the same time, so that the anti-loosening ring 20 and each adjusting block 30 can be fastened on the gland 10 by the pre-tightening bolt 40 before use, and then the whole gland 10 is sleeved on the pipeline, and similarly, the pre-tightening bolt 40 needs to be taken out before the gland 10 is locked on the pipeline. Further, if the pre-tightening bolt 40 is designed as a breakable bolt, i.e. the pre-tightening bolt 40 is broken when subjected to a radial force, the pre-tightening bolt 40 may not be removed, such breakable bolt may be a wood bolt or a plastic bolt, or a steel breakable bolt may be commercially available.

Adopt the pipeline anticreep coupling assembling that this embodiment provided, the pipeline anticreep coupling assembling that corresponds with different pipeline diameters can share same gland 10, assembles on the pipeline of different diameters promptly, only needs to change anticreep circle 20 and regulating block 30, can share the mould during manufacturing, explains manufacturing cost, and pipeline maintainer also can reduce the quantity of gland 10 when backing up the stock, and then less stock occupies fund and warehouse space.

The second embodiment.

As shown in fig. 3 and fig. 1 and 2, the pipe drop-preventing connection assembly according to the present embodiment is different from the first embodiment in that a connection unit 50 is disposed between two adjacent adjusting blocks 30. The connecting unit 50 may be the connecting unit used in embodiment four, embodiment five or embodiment six, which will be mentioned below, and of course, it may be necessary to provide a corresponding fitting structure on the adjusting block 30.

By arranging the connecting unit, the adjusting blocks 30 can be connected in series to form a ring in advance, so that the loss in use is avoided.

Example three.

As shown in fig. 4 and referring to fig. 1 and 2, the pipe anti-separation connection assembly provided in this embodiment is different from the first or second embodiment in the structure of the anti-separation ring 20, specifically, in this embodiment, the anti-separation ring 20 includes a plurality of anti-separation blocks 25 arranged in one-to-one correspondence with the adjusting blocks 30, one side of the anti-separation block, which is far away from the gland 10, has a slanted pushing surface 21 arranged to be inclined gradually from one end of the anti-separation ring 20 in the axial direction to the other end in the direction away from the gland 10, and the matching structure of the slanted pushing surface 21 and the adjusting block 30 is the same as that of the first embodiment, and will not be repeated here.

In this embodiment, the annular ring body in the first embodiment or the second embodiment is replaced by the plurality of anti-drop blocks 25, so that when the pipeline anti-drop connection assembly provided by this embodiment needs to be installed on pipelines with different diameters, only the adjusting block 30 needs to be replaced, and the gland 10 and the anti-drop ring 20 do not need to be replaced, which is helpful to further reduce the manufacturing cost, the capital occupied by the stock and the warehouse space. Naturally, the structure originally provided on the ring body needs to be correspondingly provided on each anti-falling block 25, specifically, one side of each anti-falling block 25 facing the gland is provided with a plurality of positioning grooves 23 which are matched with each positioning block 33 one to one, one side of each anti-falling block 25 far away from the gland 10 is provided with an anti-falling thread 22, each anti-falling block 25 is provided with a pre-tightening threaded hole 24 which is coaxially arranged with each first connecting hole 34 one to one, the first embodiment of the connection structure between the positioning groove 23, the anti-falling thread 22 and the pre-tightening threaded hole 24 and the corresponding component or pipeline is the same, and details are not described here.

Example four.

As shown in fig. 5 to 7 and in other figures, the pipe drop-off prevention connection assembly provided in this embodiment is different from the third embodiment in that a connection unit 50 is disposed between two adjacent drop-off prevention blocks 25 in this embodiment.

The connection unit 50 may adopt the following structure: the connection unit 50 includes a flexible rope, a chain or a spring, both ends of which are respectively fixedly connected to the corresponding anti-drop blocks 25, so that each anti-drop block 25 can be connected in series to form a ring, thereby preventing loss and facilitating installation, and simultaneously not influencing the relative position change caused by the reduction of the diameter of the circle surrounded by each anti-drop block 25 during installation. However, because the holding power of flexible rope or chain is relatively poor, in this embodiment, the trough has been seted up on each anticreep piece 25, the trough both ends are penetrating, the notch is towards the direction of gland 10, linkage unit 50 includes the elasticity ribbon, the both ends of elasticity ribbon 50 alternate respectively in the corresponding trough, and the bar hole 51 has been seted up at the position that the elasticity ribbon penetrated the trough, then every trough can alternate the elasticity ribbon that has two different linkage unit 50, the elasticity ribbon is the billet best, the bar hole 51 that alternates on two elasticity ribbons in same trough communicates each other and alternates and has same stop bolt, this stop bolt fixed connection is on corresponding regulating block 30 or anticreep piece 25, in order to avoid the preceding elasticity ribbon of assembly to break away from on anticreep piece 25. It should be noted that the pre-tightening bolt 40 may also be directly used as a limit bolt, that is, the limit bolt and the pre-tightening bolt 40 may be two different bolts or the same bolt.

Because elasticity ribbon is less relatively, has certain elasticity, can be applicable to the pipeline of different diameters, and the width of elasticity ribbon is usually far greater than thickness simultaneously, has certain bending resistance for the axial effort that receives between two adjacent anticreep pieces 25 can transmit each other, and then makes its synchronous axial motion. During the use, along with anticreep circle 20 holds the pipeline tightly gradually, anticreep circle 20's internal diameter can reduce, and the interval between two adjacent anticreep blocks 25 also can reduce thereupon, and the flat strip of elasticity can slide for anticreep block 25 this moment.

Example five.

As shown in fig. 8 and referring to other drawings, the pipeline anti-drop connection assembly provided in this embodiment is different from the fourth embodiment in that each anti-drop block 25 is not provided with a through groove, but is provided with an insertion hole with two through ends, and an elastic flat bar is inserted into the insertion hole.

Example six.

As shown in fig. 9 and 10 and in other figures, the pipe drop-preventing connection assembly according to the present embodiment is different from the fourth or fifth embodiment in that the structure of the connection unit 50 and the fitting structure of the through groove or the insertion hole and the connection unit 50 are different. Specifically, in this embodiment, each anti-separation block 25 is provided with a through slot or a through jack at two ends, and when the anti-separation block 25 is provided with the through slot, the slot faces one side of the gland 10, so that the adjusting block 30 can be used to cover the slot to prevent the connecting unit 50 from being separated from the slot. The connection unit 50 includes an elastic rack, preferably a hard rubber strip, and two ends of the elastic rack are respectively inserted into and in interference fit with the corresponding through slots or insertion holes. The teeth on the elastic rack can be helical teeth or ratchets, and when the teeth penetrate into the through grooves or the insertion holes, the teeth on the elastic rack are extruded and deformed to realize interference fit.

Preferably, in this embodiment, two elastic racks inserted into the same through slot or insertion hole are arranged in a staggered manner.

In addition, in order to avoid the need to prepare a plurality of elastic racks with different lengths for pipes with different diameters, the elastic rack may also comprise at least two rack segments which are connected in sequence and detachably connected, that is, the elastic racks at two ends are detachably connected with each other, and the specific detachable connection structure may be a conventional structure, such as riveting connection through a metal pressing ring, connecting connection of racks with connectors, or stitching connection, and the like, and will not be described in detail herein. Of course, it is not necessary that the resilient rack of each attachment unit 50 on the anti-slip ring 20 comprises at least two rack segments that are detachably connected in series.

The pipe anti-drop connection assembly provided in this embodiment can prevent the anti-drop ring 20 from being released by the mutual engagement between the ratchet teeth or the helical teeth.

Example seven.

As shown in fig. 11 and 12 and referring to other drawings, the present embodiment provides a drain valve at a terminal of a pipeline, including a valve body 60 having an inner hole, two ends of the valve body 60 are respectively provided with an opening communicated with the inner hole, one end of the valve body 60 is connected with a connecting flange 70, one side of the connecting flange 70 away from the valve body 60 is connected with a pipeline anti-dropping connection assembly 80, wherein the pipeline anti-dropping connection assembly 80 may adopt a conventional assembly, or may adopt the pipeline anti-dropping connection assembly provided in any one of the first to sixth embodiments, and in this embodiment, the description is given by taking the pipeline anti-dropping connection assembly in the fourth embodiment as an example. It should be noted that, when the drain valve at the end of the pipeline is not installed on the pipeline, the valve body 60, the connecting flange 70 and the pipeline anti-drop connecting assembly 80 may be independent from each other, and the pipeline does not belong to a part of the anti-drop pipeline joint in the embodiment, but is a target of use.

A sealing structure is arranged between the connecting flange 70 and the valve body 60, in the embodiment, a counter bore which is coaxially arranged with an inner hole of the valve body 60 is arranged at one end of the valve body 60 facing the connecting flange 70, the bottom surface of the counter bore or the side wall surface of the counter bore is a conical surface, when the side wall surface of the counter bore is a conical surface, the counter bore is substantially a conical hole, in the embodiment, the bottom surface of the counter bore is a conical surface, that is, the bottom surface of the counter bore is an inclined guide surface with the diameter or contour diameter gradually reduced from one end relatively close to the connecting flange to the other end; the sealing ring 71 abutting against the connecting flange 70 is arranged in the counter bore, one end, far away from the connecting flange 70, of the sealing ring 71 is provided with a first conical guide surface matched with the inclined guide surface of the counter bore, so that when the valve body 60 and the connecting flange 70 are fastened to each other, the valve body 60 and the connecting flange 70 can move in opposite directions, the sealing ring 71 is extruded towards the inclined guide surface through the connecting flange 70, the conical surface can apply a radial reaction force to the sealing ring 71, the sealing ring 71 is tightly held on a pipeline, and the sealing effect is relatively high. The valve body 60 and the connecting flange 70 and the gland 10 of the pipeline anti-drop connecting assembly 80 are respectively and fixedly connected through bolt connecting structures, the connecting flange 70 is pressed on the sealing ring 71 through the pulling force of a bolt, so that the sealing ring 71 is pressed on the inclined guide surface to realize sealing, and the sealing structure is formed. It should be noted that the bolt connection structure between the valve body 60 and the connecting flange 70 and the bolt connection structure between the connecting flange 70 and the gland 30 may be the same bolt connection structure, or may be different bolt connection structures, and in this embodiment, the same bolt connection structure. Specifically, the bolt connection structure includes studs inserted in the valve body 60, the connection flange 70 and the gland 10 at the same time, and a first nut 61, a second nut 62 and a third nut 63 respectively screwed on the studs, where the first nut 61 abuts against one end of the valve body 60 far away from the connection flange 70, the second nut 62 abuts against one end face of the connection flange 70, the example that the second nut 62 abuts against one end of the connection flange 70 far away from the valve body 60 is described here, and the third nut 63 abuts against one end of the gland 10 far away from the connection flange 70. When the valve is used, the valve body 60 and the connecting flange 70 are fixedly connected together by the first nut 61 and the second nut 62, and the connecting flange 70 compresses the sealing ring 71 to realize sealing in the process; after the gland 10 and the connecting flange 70 are fixedly connected to each other by the third nut 63, the connecting flange 70 compresses the anti-slip ring 71 to fasten the anti-slip ring to the pipe.

The connecting flange 70 has a first collar 72 abutting against the sealing ring 71 and a second collar 73 abutting against the anti-slip ring 20, the first collar 72 having an outer diameter smaller than the diameter of the counterbore so as to penetrate into the counterbore to compress the sealing ring 71.

The terminal surface of the one end of valve body 60 far away from flange 70 is the inclined plane of arranging for from the top down gradually toward the direction slope of keeping away from flange 70, and the upper portion fixed connection or the body coupling of the one end of valve body 60 far away from flange 70 have a support 91, rotate on the support 91 and be connected with the gravity lid 90 that supports on the inclined plane, rotate on the gravity lid 90 and be connected with the air spring 92 (also known as the gas pole, can directly purchase the acquisition from the market) of rotating simultaneously and connecting on support 91. Preferably, a sealing groove arranged around the corresponding opening is formed in the inclined surface, a sealing ring is arranged in the sealing groove, and the gravity cover 90 abuts against the sealing ring to form sealing, so that water leakage when the gravity cover 90 abuts against the inclined surface is avoided. During the use, when the water pressure in the valve body 60 reaches the certain degree, can promote gravity lid 90 and rotate, make it leave the inclined plane, so that water discharges, when water pressure was too little, gravity lid 90 can support under the action of gravity on the inclined plane, make water unable discharge, at this in-process, because the existence of air spring 92, gravity lid 90 can not pat suddenly on valve body 60, but slow lid closes, and the noise is less relatively, and is favorable to little water pressure drainage.

The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.

Claims (6)

1. The utility model provides a terminal drain valve of pipeline, a serial communication port, including the valve body that has the hole, the both ends of valve body seted up respectively with the opening of hole intercommunication, the one end of valve body is connected with flange, flange keeps away from one side of valve body is connected with pipeline anticreep coupling assembling, flange with be provided with seal structure between the valve body, the valve body is kept away from the terminal surface of flange's one end is from last down toward keeping away from gradually the inclined plane that flange's direction slope was arranged, just the valve body is kept away from upper portion fixed connection or the an organic whole of flange's one end have the support, it is in to rotate on the support to be connected with to support the top gravity lid on the inclined plane, gravity is covered to rotate to be connected with simultaneously and is connected air spring on the support.

2. The pipe end drain valve according to claim 1, wherein the inclined surface is provided with a sealing groove disposed around the corresponding opening, a sealing ring is disposed in the sealing groove, and the gravity cover abuts against the sealing ring.

3. The drain valve at the tail end of the pipeline according to claim 1, wherein a counter bore which is coaxially arranged with the inner bore is formed in one end of the valve body facing the connecting flange, a sealing ring which abuts against the connecting flange is arranged in the counter bore, the bottom surface of the counter bore is an inclined guide surface of which the diameter or the profile diameter is gradually reduced from one end which is relatively close to the connecting flange to the other end, and the valve body and the connecting flange and the pipeline anti-drop connecting assembly are fixedly connected through bolt connecting structures respectively.

4. The drain valve at the tail end of the pipeline as claimed in any one of claims 1 to 3, wherein the pipeline anti-drop connecting assembly comprises a gland, the gland is provided with a through hole, the inner side wall of the through hole is provided with an inclined guide surface, the diameter or the outline diameter of the inclined guide surface is gradually reduced from one end of the through hole to the other end of the through hole, an anti-drop ring is arranged in the through hole, and a plurality of adjusting blocks which are wound around the axis of the gland are arranged between the anti-drop ring and the gland;

the anti-drop ring is an annular ring body, and the outer side wall of the ring body is provided with an inclined pushing surface of which the diameter or the profile diameter is gradually reduced from one axial end of the anti-drop ring to the other axial end;

or the anti-drop ring comprises a plurality of anti-drop blocks which are arranged in one-to-one correspondence with the adjusting blocks, and one side, away from the gland, of each anti-drop block is provided with an inclined pushing surface which is arranged in an inclined manner from one axial end of the anti-drop ring to the other axial end of the anti-drop ring to the direction away from the gland;

the inclined direction of the inclined guide surface and the inclined pushing surface relative to the axis of the gland is the same, one side of the adjusting block, facing the gland, is provided with an outer inclined surface abutting against the inclined guide surface, and one side of the adjusting block, facing the anti-falling ring, is provided with an inner inclined surface abutting against the inclined pushing surface.

5. The drain valve at the tail end of the pipeline as claimed in claim 4, wherein a positioning block is further arranged on one side of the adjusting block facing the anti-dropping ring, and a plurality of positioning grooves matched with the positioning blocks in a one-to-one mode are formed on one side of the ring body or one side of each anti-dropping block facing the gland.

6. The pipe end drain valve according to claim 4, wherein a connection unit is provided between two adjacent regulating blocks and/or between two adjacent anti-drop blocks.

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