CN219841037U - Drainage sealing structure of fire hydrant - Google Patents

Abstract

The utility model discloses a water draining sealing structure of a fire hydrant, which comprises a main body, a valve rod, a water draining rod, a main valve seat and a valve core, wherein the valve rod, the water draining rod, the main valve seat and the valve core are sequentially arranged in an inner cavity of the main body from top to bottom, a water draining ring is coaxially arranged outside the main valve seat, a first water draining through hole is arranged on the main valve seat, and a second water draining through hole communicated with the first water draining through hole is arranged on the water draining ring, and the water draining sealing structure is characterized in that: the upper orifice of the first drainage through hole is positioned on the upper end face of the main valve seat, and a blocking head is arranged at the position of the lower end face of the drainage rod corresponding to the upper orifice. The upper orifice of the first drainage through hole is sealed through the bottom of the blocking head, the blocking head is not in relative sliding contact with the main valve seat, the blocking head is not easy to wear, the sealing effect between the blocking head and the first drainage through hole is enhanced, and the service life of the fire hydrant is prolonged.

Description

Drainage sealing structure of fire hydrant

Technical Field

The utility model relates to a fire-fighting equipment technical field especially relates to a fire hydrant drainage seal structure.

Background

After the hydrant is used, a part of water remains in the inner cavity of the hydrant below the water outlet of the water outlet pipe. If the hydrant is used in winter or in cold areas, the residual water may freeze and crack the hydrant. The existing fire hydrant utilizes the relative sliding of the outer side wall of the sealing ring and the inner side wall of the main valve seat to realize the sealing and opening of the drainage through hole by arranging the drainage through hole on the main valve seat.

In the process of carrying out relative sliding between the sealing ring and the main valve seat for multiple times, the outer side wall of the sealing ring is easy to wear, so that the outer diameter of the outer side wall of the sealing ring is reduced, the outer side wall of the sealing ring cannot be tightly attached to the side wall of the main valve seat, namely, the sealing effect of the sealing ring on the drainage through hole is poor, and the service life of the sealing ring is short; when the fire hydrant is in a fully opened state, water leakage of the water drainage through hole possibly occurs, and normal use of the fire hydrant is affected, so that development of a fire hydrant water drainage sealing structure is very necessary.

Disclosure of Invention

The utility model aims to provide a drainage sealing structure of a fire hydrant, which solves the problems that in the prior art, in the process of sealing a drainage through hole, the side wall of the sealing ring is easy to wear, the sealing effect is poor, and when the fire hydrant is in a fully opened state, the drainage through hole leaks, so that the normal use of the fire hydrant is influenced.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a fire hydrant drainage seal structure, includes main part, top-down set gradually in valve rod, drainage pole, main disk seat and the case of main part inner chamber, the outside coaxial drainage ring that is provided with of main disk seat, be equipped with first drainage through-hole on the main disk seat, be equipped with on the drainage ring with the second drainage through-hole that first drainage through-hole is linked together, its characterized in that: the upper orifice of the first drainage through hole is positioned on the upper end face of the main valve seat, and a blocking head is arranged at the position of the lower end face of the drainage rod corresponding to the upper orifice.

As a further scheme of the utility model: the main body sequentially comprises an upper cylinder, a lower cylinder and a base from top to bottom; the valve rod comprises an upper valve rod, an anti-collision joint and a lower valve rod from top to bottom in sequence, wherein the upper end and the lower end of the anti-collision joint are respectively detachably connected with the upper valve rod and the lower valve rod, and an easily-folded groove is formed in the outer side wall of the middle of the anti-collision joint.

As a further scheme of the utility model: the valve core comprises an upper valve core, a main valve sealing ring and a lower valve core, and a spring, the drain rod, the upper valve core and the lower valve core are sleeved on the middle lower part of the lower valve rod from top to bottom in sequence; the top of the spring is arranged on the lower valve rod through a stop piece, and the bottom of the spring is abutted to the top of the drainage rod.

As a further scheme of the utility model: the main valve sealing ring is arranged at the top end of the lower valve core, the top of the main valve sealing ring is tightly pressed through the bottom of the upper valve core, and the side wall of the upper part is abutted with the conical sealing surface at the bottom end of the main valve seat to seal the bottom end of the main valve seat.

As a further scheme of the utility model: the upper cylinder body and the lower cylinder body are detachably connected through an anti-collision flange.

As a further scheme of the utility model: the first drainage through hole comprises a plurality of first water inlets vertically arranged at intervals at the top end of the main valve seat and a plurality of first water outlets horizontally arranged at the bottom ends of the first water inlets in a surrounding mode.

As a further scheme of the utility model: the sealing heads are arranged above the corresponding first water inlets, and the first water inlets are sealed through the corresponding sealing heads.

As a further scheme of the utility model: the second drainage through hole comprises a second water inlet horizontally arranged on the inner wall of the middle upper part of the drainage ring in a surrounding mode and a plurality of second water outlets horizontally arranged on the outer side of the second water inlet at intervals.

As a further scheme of the utility model: the main valve seat is connected with the drainage ring through threads.

The utility model has the beneficial effects that the bottom of the blocking head seals the upper orifice of the first drainage through hole, the blocking head does not make relative sliding contact with the main valve seat, the abrasion of the blocking head is reduced, the sealing effect is enhanced, and the service life of the fire hydrant is prolonged.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a partial cross-sectional structure of the present utility model in a closed state;

FIG. 2 is a schematic view of a partial cross-sectional structure of the present utility model in a fully open state;

FIG. 3 is a schematic illustration of the internal surplus water diversion path of the present utility model;

FIG. 4 is a top view of the primary valve seat of the present utility model;

FIG. 5 is a front view of the primary valve seat of the present utility model;

fig. 6 is a cross-sectional view of the drain ring of the present utility model.

Wherein the reference numerals are as follows:

1. a main body; 101. an upper cylinder; 102. a lower cylinder; 103. a base; 104. an anti-collision flange; 105. a drain ring gland; 2. a valve stem; 201. an upper valve rod; 202. an anti-collision joint; 203. a lower valve rod; 204. an easy-to-fold groove; 205. a spring; 206. a stopper; 3. a drain bar; 4. a main valve seat; 401. a first drainage through hole; 402. a first water inlet; 403. a first water outlet; 404. a guide protrusion; 5. a valve core; 501. an upper valve core; 502. a main valve seal ring; 503. a lower valve core; 6. a blocking head; 7. a drainage ring; 701. a second drainage through hole; 702. a second water inlet; 703. and a second water outlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, the drainage sealing structure of the hydrant of the present utility model includes a main body 1, a valve rod 2, a drainage rod 3, a main valve seat 4 and a valve core 5 sequentially disposed in an inner cavity of the main body 1 from top to bottom, a drainage ring 7 coaxially disposed outside the main valve seat 4, a first drainage through hole 401 disposed on the main valve seat 4, and a second drainage through hole 701 disposed on the drainage ring 7 and communicated with the first drainage through hole 401, wherein: the upper orifice of the first drainage through hole 401 is positioned on the upper end surface of the main valve seat 4, and a blocking head 6 is arranged on the lower end surface of the drainage rod 3 at a position corresponding to the upper orifice.

In the prior art, the plugging head 6 is coaxially arranged in the inner cavity of the main valve seat 4 and sleeved at the middle lower part of the valve rod 2, the first drainage through hole 401 is formed in the side wall of the main valve seat 4, and the sealing or opening of the first drainage through hole 401 is controlled by the relative sliding between the outer side wall of the plugging head 6 and the inner side of the main valve seat 4. After the above structure is repeatedly used for many times, the outer side wall of the plugging head 6 slides relatively with the inner side wall of the main valve seat 4 many times, and the outer side wall of the plugging head 6 is easy to wear, i.e. the outer diameter of the outer side wall of the plugging head 6 is small, and the first drainage through hole 401 cannot be tightly sealed.

The first drainage through hole 401 is arranged at the upper end of the main valve seat 4, the blocking head 6 is positioned above the main valve seat 4, and the bottom of the blocking head 6 can be abutted against the upper orifice of the first drainage through hole 401 so as to realize the sealing between the blocking head 6 and the first drainage through hole 401. When the plugging head 6 moves up and down, the plugging head is not in relative sliding contact with the outer wall of the main valve seat 4, and is only in contact with the upper end surface of the first drainage through hole 401, namely after repeated use, the plugging head 6 is not easy to wear, so that the service life of the plugging head 6 is prolonged, and the tightness is improved.

Referring to arrows in fig. 3, when the hydrant is in a closed state, the residual water in the inner cavity of the main body 1 flows through the first drainage through hole 401 and the second drainage through hole 701 in sequence, and then flows to the outside of the main body 1.

Further, the main body 1 sequentially comprises an upper cylinder 101, a lower cylinder 102 and a base 103 from top to bottom; the valve rod 2 sequentially comprises an upper valve rod 201, an anti-collision joint 202 and a lower valve rod 203 from top to bottom, wherein the upper end and the lower end of the anti-collision joint 202 are respectively detachably connected with the upper valve rod 201 and the lower valve rod 203, and an easily-folded groove 204 is formed in the outer side wall of the middle of the anti-collision joint 202.

When the hydrant is impacted by external force or an automobile with traffic accident, the easily-broken groove 204 is broken first, and the upper valve rod 201 is separated from the lower valve rod 203. The anti-collision joint 202 effectively separates the upper valve stem 201 and the lower valve stem 203 to protect components disposed within the lower cylinder 102 and components within the base 103. Only the damaged accessories are purchased for repair; and the replacement and maintenance are convenient.

Further, the valve core 5 comprises an upper valve core 501, a main valve sealing ring 502 and a lower valve core 503, and a spring 205, a drain rod 3, the upper valve core 501 and the lower valve core 503 are sleeved on the middle lower part of the lower valve rod 203 from top to bottom in sequence; the top end of the spring 205 is provided on the lower stem 203 via a stopper 206, and the bottom end thereof abuts against the top end of the drain rod 3.

When the hydrant is in a fully opened state, the lower valve rod 203 moves downwards, and the spring 205 drives the drain rod 3 to move downwards, so that the plugging head 6 seals the upper orifice of the first drain through hole 401 below the lower valve rod. The greater the opening of the hydrant, the more tightly the spring 205 presses the stopper 6, i.e. the upper orifice of the first drainage through hole 401 is sealed; when the bottom of the plugging head 6 is worn, namely the bottom end thickness is thinned, the bottom end of the plugging head 6 is pressed downwards by the spring 205 to be worn, so that the bottom of the plugging head 6 seals the upper orifice of the first drainage through hole 401 below the bottom; when the hydrant is in a closed state, the valve rod 2 moves upwards, the lower valve rod 203 moves downwards, the upper valve core 501 moves upwards, and when the top of the upper valve core 501 contacts with the bottom of the drain rod 3, the upper valve core 501 drives the drain rod 3 to move upwards, namely the plugging head 6 is separated from the upper orifice of the first drain through hole 401.

Further, the main valve sealing ring 502 is mounted on the top end of the lower valve core 503, and the top portion thereof is pressed by the bottom portion of the upper valve core 501, wherein the upper side wall is abutted against the tapered sealing surface of the bottom end of the main valve seat 4 to seal the bottom end of the main valve seat 4. Specifically, the main valve seat 4 is disposed above the lower valve core 503 and is located at a connection position between the lower valve core 503 and the drain ring gland 105, a side wall of the middle upper portion of the main valve seat 4 is attached to a side wall of the drain ring gland 105, and a side wall of the bottom end of an inner cavity of the main valve seat 4 is in a conical sealing surface structural design.

When the fire hydrant is in a fully-opened state, the valve rod 2 drives the upper valve core 501 and the lower valve core 503 to move downwards, the main valve sealing ring 502 moves downwards, the side wall of the main valve sealing ring 502 is separated from the conical sealing surface at the bottom end of the main valve seat 4, the plugging head 6 seals the first drainage through hole 401, namely the inner cavity of the base 103 is communicated with the inner cavity of the lower cylinder 102, and the fire hydrant is opened; when the hydrant is in a closed state, the valve rod 2 drives the upper valve core 501 and the lower valve core 503 to move upwards, so that the main valve sealing ring 502 moves upwards, the main valve sealing ring 502 is abutted against the conical sealing surface at the bottom end of the main valve seat 4, the plugging head 6 is separated from the first drainage through hole 401, that is, the inner cavity of the base 103 is not communicated with the inner cavity of the lower cylinder 102, and the inner cavity of the lower cylinder 102 is communicated with the second drainage through hole 701 through the first drainage through hole 401, so that the residual water in the upper cylinder 101 and the lower cylinder 102 is continuously drained.

Further, the upper cylinder 101 and the lower cylinder 102 are detachably connected through an anti-collision flange 104. Specifically, the anti-collision flange 104 is sleeved at the bottom end of the upper cylinder 101 in a relatively rotatable manner, and the anti-collision flange 104 is connected with the lower cylinder 102 through bolts, so that the upper cylinder 101 can rotate by 360 degrees, and the flexibility of the hydrant is improved.

Referring to fig. 4 and 5, the first drainage through hole 401 includes a plurality of first water inlets 402 vertically spaced apart from each other at the top end of the main valve seat 4, and a plurality of first water outlets 403 horizontally arranged around the bottom ends of the plurality of first water inlets 402.

Specifically, the first water inlet 402 is an upper orifice of the first drainage through hole 401.

In some embodiments, the first water outlets 403 are ring grooves, which are formed in the outer wall of the main valve seat 4 and are communicated with the first water outlets 403.

Further, the number of the plugging heads 6 is several, and the plugging heads are arranged right above the corresponding first water inlets 402, and the first water inlets 402 are sealed by the corresponding plugging heads 6.

In some embodiments, the number of the first water inlets 402 is 2, and the first water inlets are symmetrically arranged at the top end of the main valve seat 4; the bottom of the drainage rod 3 is embedded with 2 plugging heads 6, and the 2 plugging heads 6 are respectively used for sealing the corresponding first water inlets 402.

In some of these embodiments, the top end of the main valve seat 4 is further provided with a guide protrusion 404, and the guide protrusion 404 is slidably connected to two side walls of the drain rod 3, for guiding the up-and-down movement of the drain rod 3, so that the plugging head 6 is located directly above the corresponding first water inlet 402.

Referring to fig. 6, the second drainage through hole 701 includes a second water inlet 702 horizontally annularly disposed on the inner wall of the middle upper portion of the drainage ring 7 and a plurality of second water outlets 703 horizontally disposed at intervals outside the second water inlet 702.

In some embodiments, the second water inlet 702 is a ring groove, and is formed on the inner wall of the drain ring 7.

When the hydrant is in a closed state, residual water in the main body 1 sequentially flows through the first water inlet 402, the first water discharge through hole 401, the first water outlet 403, the second water inlet 702, the second water discharge through hole 701 and the second water outlet 703, and is discharged to the outside from the second water outlet 703.

In some embodiments, as shown in fig. 3, a notch is formed on the side wall of the drain ring gland 105, and the notch is aligned with the second water outlet 703, and the edge of the drain ring 7 is detachably embedded in the notch, that is, the residual water in the main body 1 flows from the notch to the outside through the drain ring 7.

Further, in order to facilitate replacement and maintenance of the main valve seat 4 and the valve spool 5, the main valve seat 4 is screwed with the drain ring 7. Specifically, the outer wall of the middle lower part of the main valve seat 4 is in threaded connection with the inner wall of the middle lower part of the drainage ring 7; the drain ring 7 is fixed on the base 103, and the upper and lower ends of the drain ring 7 are respectively fixed with the base 103 through drain ring covers 105; the drain rod 3 slides up and down only in the vertical direction of the lower valve rod 203, and the drain rod 3 does not rotate relative to the lower valve rod 203. When the replacement and maintenance are needed, the main valve seat 4 is indirectly driven to rotate by utilizing the dismounting tool to separate the main valve seat 4 from the water draining ring 7, the valve rod 2 is pulled, the valve rod 2 drives the valve core 5 to move upwards, the valve core 5 drives the water draining rod 3 and the main valve seat 4 to move upwards, namely, the main valve sealing ring 502 supports the main valve seat 4 to move upwards, the upper valve core 501 supports the water draining rod 3 to move upwards, so that the water draining rod 3, the main valve seat 4 and the valve core 5 are separated from the inner cavity of the base 103, and the replacement and the maintenance are convenient.

The foregoing describes one embodiment of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims (9)

1. The utility model provides a fire hydrant drainage seal structure, includes main part (1), top-down set gradually in valve rod (2), drainage rod (3), main disk seat (4) and case (5) of main part (1) inner chamber, the outside coaxial drainage ring (7) that are provided with of main disk seat (4), be equipped with first drainage through-hole (401) on main disk seat (4), be equipped with on drainage ring (7) with second drainage through-hole (701) that first drainage through-hole (401) are linked together, its characterized in that: the upper orifice of the first drainage through hole (401) is positioned on the upper end face of the main valve seat (4), and a blocking head (6) is arranged at the position of the lower end face of the drainage rod (3) corresponding to the upper orifice.

2. The hydrant drain seal structure according to claim 1, wherein: the main body (1) sequentially comprises an upper cylinder (101), a lower cylinder (102) and a base (103) from top to bottom; the valve rod (2) sequentially comprises an upper valve rod (201), an anti-collision joint (202) and a lower valve rod (203) from top to bottom, the upper end and the lower end of the anti-collision joint (202) are respectively detachably connected with the upper valve rod (201) and the lower valve rod (203), and an easily-folded groove (204) is formed in the outer side wall of the middle of the anti-collision joint (202).

3. The hydrant drain seal according to claim 2, wherein: the valve core (5) comprises an upper valve core (501), a main valve sealing ring (502) and a lower valve core (503), wherein a spring (205), the drain rod (3), the upper valve core (501) and the lower valve core (503) are sleeved on the middle lower part of the lower valve rod (203) from top to bottom in sequence; the top end of the spring (205) is arranged on the lower valve rod (203) through a stop piece (206), and the bottom end of the spring is abutted against the top end of the drain rod (3).

4. A hydrant drain seal according to claim 3, wherein: the main valve sealing ring (502) is mounted at the top end of the lower valve core (503), and the top of the main valve sealing ring is tightly pressed by the bottom of the upper valve core (501), wherein the side wall of the upper part is abutted with the conical sealing surface at the bottom end of the main valve seat (4) to seal the bottom end of the main valve seat (4).

5. The hydrant drain seal according to claim 2, wherein: the upper cylinder body (101) is detachably connected with the lower cylinder body (102) through an anti-collision flange (104).

6. The hydrant drain seal structure according to claim 1, wherein: the first drainage through hole (401) comprises a plurality of first water inlets (402) which are vertically arranged at the top end of the main valve seat (4) at intervals and a plurality of first water outlets (403) which are horizontally arranged at the bottom ends of the first water inlets (402) in a surrounding mode.

7. The hydrant drain seal according to claim 6, wherein: the number of the plugging heads (6) is several, the plugging heads are arranged right above the corresponding first water inlets (402), and the first water inlets (402) are sealed through the corresponding plugging heads (6).

8. The hydrant drain seal structure according to claim 1, wherein: the second drainage through hole (701) comprises a second water inlet (702) horizontally arranged on the inner wall of the middle upper part of the drainage ring (7) in a surrounding mode and a plurality of second water outlets (703) horizontally arranged on the outer side of the second water inlet (702) at intervals.

9. The hydrant drain seal structure according to claim 1, wherein: the main valve seat (4) is connected with the water draining ring (7) through threads.