CN216382705U - Check valve of water meter - Google Patents

Abstract

The utility model provides a check valve of a water meter, and belongs to the technical field of valves. It has solved the poor problem of current check valve installation stability. This water gauge check valve includes upper end open-ended valve body and connects in the valve gap of valve body opening part, is provided with the buckle on the valve gap, is provided with the case in the valve body, and the cover is equipped with on the case and lets the case support to lean on to the valve gap on form sealed spring, radially runs through on the valve body and is provided with the draw-in groove, and the buckle is detained on the roof of draw-in groove, and the both sides wall counterbalance of buckle and the both sides cell wall of draw-in groove leans on, be provided with on the valve body inner peripheral surface with the draw-in groove just to spout and the spout that communicates through a valve body open-ended terminal surface. This water gauge check valve passes through the buckle and supports with the draw-in groove interior relative both sides face homoenergetic along the both sides face homoenergetic that valve gap circumference set up to realized that circumference between valve gap and the valve body is fixed, prevented that the condition of taking place valve gap and valve body oneself separation at the check valve during operation has improved this water gauge check valve's installation stability.

Description

Check valve of water meter

Technical Field

The utility model belongs to the technical field of valves, relates to a check valve, and particularly relates to a check valve of a water meter.

Background

A water meter is a meter for measuring the flow of water and is used for measuring the total flow of water. The water meter is installed on the water pipe, when the user discharges water, the pointer or character wheel on the meter rotates to indicate the passing water quantity, the water meter starts to count as long as water passes through the water meter, but in fact, only water which flows through the water meter from the outdoor to enter the indoor is water used by the customer, and the water should be counted. And the part of water returning indoors to outdoors should not be counted in the cumulative flow of water. Especially when water is cut off, because the position of the indoor water pipe is relatively high, water in the indoor water pipe can easily flow back to the outdoor by virtue of potential energy, so that the counting of the water meter is inaccurate, and dirt in the water pipe can easily enter the water meter, so that the water meter is damaged.

In order to solve the problem that water flows back to the water meter, most of the existing check valves are installed in the water meter to prevent backflow, for example, the chinese patent with the application number of CN201420436924, the check valve comprises a valve body, a valve core, a valve rod, a spring and a guide end cover, wherein a plurality of guide strips are fixedly connected to the circumferential outer side wall of the guide end cover, the guide strips are arranged along the axial direction of the valve body, the front ends of the guide strips are fixedly connected with the valve body, the valve core and the valve rod are positioned in a space surrounded by the plurality of guide strips, the valve core is abutted against the valve body, a first sealing ring is arranged between the valve core and the valve body, the circumferential outer side wall of the valve core is contacted with the inner side wall of the guide strips, one end of the valve rod is fixedly connected with the valve core, the other end of the valve rod is arranged in the guide end cover in a penetrating manner, the spring is sleeved outside the valve rod, one end of the spring is abutted against the valve core, and the other end of the guide end of the spring is abutted against the guide end cover.

Meanwhile, the check valve is also arranged on the market, the valve cover and the valve body are fixed by arranging a blocking edge on the valve cover, a clamping groove matched with the blocking edge is arranged on the valve body, and after the valve cover is inserted into the valve body, the blocking edge is clamped into the clamping groove through rotation to fix the valve cover and the valve body.

Although the two fixing methods can fix the cover and the housing in the valve, the fixing method has the following disadvantages: the fixed mode that adopts among the above-mentioned check valve, its valve gap or valve body can receive the produced rotational force of fluid under hydraulic effect in the course of the work of check valve, receive the rotational force after valve gap or valve body, can make valve gap or valve body rotate along circumference, can lead to producing to become flexible and wearing and tearing between valve gap and the valve body after too big or long-time rotation of valve gap or valve body rotation angle very probably, make the lid break away from the valve body, lead to the unable "non return" of check valve, it is poor to see the installation stability between above-mentioned lid and the casing.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, provides a check valve of a water meter, and solves the problem that the existing check valve is poor in installation stability.

The purpose of the utility model can be realized by the following technical scheme:

a check valve of a water meter comprises a valve body with an opening at the upper end and a valve cover connected to the opening of the valve body, wherein a buckle is arranged on the valve cover, a valve core is arranged in the valve body, and a spring which can enable the valve core to abut against the valve cover to form a seal is sleeved on the valve core.

When in installation, the spring is firstly placed in the valve body, one end of the spring is propped against the valve body, then the valve core is penetrated into the spring, the other end of the spring is propped against the valve core, in the process of installing the valve cover on the valve body, the valve cover is firstly placed right above the opening end of the valve body, and the buckle on the valve cover is opposite to the chute, then the valve cover is inserted into the valve body, the buckle is extruded into the chute, after the valve cover is continuously inserted, because the chute is opposite to and communicated with the clamping groove, so the slide groove can guide the buckle to be clamped into the clamping groove, thereby fixing the valve cover and the valve body, and when the valve cover is fixed on the valve body, the valve cover can extrude the valve core to compress the spring, the valve core can abut against the valve cover due to the spring force of the spring to form a pre-tightening force, so that the valve core and the valve cover form sealing, and the check valve is installed in the joint of the water meter and the water pipe after the installation is finished. When the water meter check valve is used, water flows in from one end of the valve cover and acts on the valve core, when the acting force of the water flow is larger than the spring force of the spring acting on the valve core, the water flow can jack the valve core to extrude the spring to enable the water flow to flow into the valve body through the valve cover, and then flows into the water pipe through the valve body, when the water pressure in the water pipe is larger than the water pressure in the water meter, the spring pushes the valve core again to enable the valve core to lean against the valve cover again and form sealing, so that the check function of the water meter check valve is realized.

Because the buckle card goes into the draw-in groove in the back, the left and right sides wall of buckle and the left and right sides cell wall of corresponding draw-in groove are supported and lean on, so at the during operation, even valve gap and valve body receive the produced rotatory effort of fluid under hydraulic effect, thereby the buckle on the valve gap also can receive the resistance of both sides cell wall in above-mentioned draw-in groove and can not produce relative deflection with the valve body to realized the circumference between valve gap and the valve body and fixed, prevented the condition that takes place valve gap and valve body self-separation when the check valve during operation, improved this water gauge check valve's installation stability. Simultaneously because spout setting and valve body inner peripheral surface are gone up and are run through a valve body open-ended terminal surface, still just to the intercommunication with the draw-in groove, so the user can directly aim at the spout earlier when not inserting the valve gap, can directly go into the draw-in groove with the buckle card after inserting the valve gap through the spout in, prevent that the user from taking place the buckle when valve gap and valve body assembly and to inaccurate the condition of draw-in groove, further improvement the installation stability of this water gauge check valve.

In the check valve of the water meter, the end, facing the opening of the valve body, of the valve cover is connected with the deformation part which is annular and has elasticity, and the buckle is arranged on the outer peripheral surface of the deformation part.

Because deformation portion has elasticity, so when the installation, buckle on the deformation portion outer peripheral face can make deformation portion inwards deform after receiving the extrusion of spout inner wall, make the periphery diameter of deformation portion reduce, continue to exert oneself and insert the back with the valve gap, make the buckle break away from in the spout card goes into the draw-in groove, deformation portion rebounds to initial position simultaneously, thereby realize the fixed between valve gap and the valve body, and thereby the setting up of above-mentioned spout can let deformation portion can not excessively deform when deformation and lead to buckle or deformation portion cracked condition to appear, stability in the installation has been strengthened.

In the check valve of the water meter, the buckle is provided with the abutting surface and the guide surface, an acute angle is formed between the abutting surface and the guide surface, and the abutting surface abuts against the inner wall of one side, close to the valve cover, of the clamping groove.

Through leaning on the inner wall that leans on face and draw-in groove to be close to valve gap one side to offset and lean on, realized the axial fixity between valve gap and the valve body, through leaning on the setting that is the acute angle between face and the spigot surface for when the spigot surface card is gone into and is equipped with the guide effect when possessing the spout, also make in the installation make deformation portion slowly inwards dwindle, avoided appearing exerting oneself suddenly and lead to the condition appearance of deformation portion rupture, thereby promoted the stability in the installation between valve gap and the valve body. Meanwhile, under the action of spring force, the valve core can also push the valve cover to enable the abutting surface on the buckle to abut against the inner wall of one side, close to the valve cover, of the clamping groove, so that the valve cover and the valve body are more stably and firmly installed.

In the check valve of the water meter, the inner peripheral surface of the deformation part is provided with a conical surface, and the conical surface abuts against one end, close to the valve cover, of the valve core to form a seal.

Through the buckle that sets up on the deformation portion outer peripheral face and the conical surface that the inner peripheral surface set up for when installing the valve gap, pass through the in-process that the spout card goes into the draw-in groove at the buckle, the conical surface that deformation portion inner peripheral surface set up also supports and promote the case, makes case extrusion spring, under the effect of spring force, and the case forms a pretightning force on the conical surface, thereby makes the conical surface and the one end that the case is close to the valve gap form sealedly.

In the check valve of the water meter, the end of the valve core close to the valve cover is provided with a sealing part which is abutted against the conical surface, and the spring is abutted between the sealing part and the valve body.

In the valve cover installation process, the conical surface on the inner peripheral surface of the deformation part is abutted against the sealing part, the valve cover can gradually push the sealing part to extrude the spring along with the insertion of the valve cover into the valve core until the buckle is clamped into the clamping groove, and after the valve cover is installed, the sealing part is always tightly attached to the conical surface under the spring force of the spring, so that the sealing state is kept.

In the check valve of the water meter, the sealing part is provided with the sealing groove, the sealing groove is internally provided with the sealing ring, and the sealing ring is abutted against the conical surface.

Through the sealing ring arranged in the sealing groove, the sealing part enables the sealing ring to abut against the valve cover under the action of the spring force, so that sealing is realized.

In the check valve of the water meter, the valve body is uniformly provided with the plurality of ribs along the circumferential direction, the sealing part is provided with the convex block, the convex block is positioned between every two adjacent ribs, and the convex block extends out of the valve body.

Because its circumference does not form fixedly when the case is installed in the valve body, so when the case takes place the circumference rotation in operating condition, thereby the lug that sets up on the case sealing part can support and lean on the rib of both sides to realize circumference spacing, thereby prevent that the case from leading to the installation stability of case to reduce owing to excessive circumference rotation.

In the check valve of the water meter, the valve body is internally provided with a positioning hole which is matched with one end of the valve core far away from the valve cover in a penetrating manner, the valve body is internally provided with an annular groove which circumferentially surrounds along the positioning hole, the annular groove and the positioning hole are in the same circle center, one end of the spring is abutted against the annular groove, and the other end of the spring is abutted against the sealing part.

Because the valve core is far away from the one end setting and the locating hole of valve gap, so when the during operation, the valve core is close to the pressure that the one end of valve gap received rivers to overcome the spring force and realize the endwise slip, the setting of locating hole can improve the stability when the valve core endwise slip, produces the skew when preventing the valve core endwise slip.

Compared with the prior art, this water gauge check valve possesses following advantage:

1. this water gauge check valve passes through the buckle and supports with the draw-in groove interior relative both sides face homoenergetic along the both sides face homoenergetic that valve gap circumference set up to realized that circumference between valve gap and the valve body is fixed, prevented that the condition of taking place valve gap and valve body oneself separation at the check valve during operation has improved this water gauge check valve's installation stability.

2. Spout and draw-in groove are just to the intercommunication in this water gauge check valve, prevent that the user from taking place the buckle when valve gap and valve body assembly and to the condition of inaccurate draw-in groove, further improvement this water gauge check valve's installation stability.

3. The setting of spout can let deformation portion can not excessively deform when deformation thereby lead to buckle or the cracked condition to appear in deformation portion simultaneously in this water gauge check valve, has strengthened the stability in the installation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

fig. 4 is an exploded view of the present invention.

In the figure, 1, a valve body; 1a, a clamping groove; 1b, a chute; 1c, ribs; 1d, positioning holes; 1e, an annular groove; 2. a valve cover; 2a, a deformation part; 2a1, snap; 2a11, abutment face; 2a12, guide surface; 2a2, a tapered surface; 3. a valve core; 3a, a sealing part; 3a1, seal groove; 3a2, sealing ring; 3a3, bumps; 4. a spring; 5. and (4) fixing the ring.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-4, a check valve for a water meter comprises a cylindrical valve body 1 with an open upper end and a valve core 3 arranged in the valve body 1, specifically, one end of the valve core 3, which is far away from a valve cover 2, penetrates through a positioning hole 1d in the valve body 1, an annular groove 1e circumferentially surrounding the positioning hole 1d is further arranged in the valve body 1, a spring 4 is sleeved on the valve core 3, specifically, one end of the spring 4 abuts against the annular groove 1e, the other end of the spring abuts against a sealing part 3a, one end of the valve core 3, which is far away from the positioning hole 1d, is pressed, so that the valve core 3 overcomes the acting force of the spring 4 to slide in the positioning hole 1d, and the valve core 3 can be reset after being loosened.

As shown in fig. 1-4, a check valve for a water meter further includes a valve cap 2, the valve cap 2 can be inserted into an opening of a valve body 1, and can be fastened to a slot 1a by a clip 2a1, specifically, the valve body 1 is provided with a slot 1a along a radial direction, a clip 2a1 is fastened to a top wall of the slot 1a, and at the same time, a sliding slot 1b opposite to and communicated with the slot 1a is provided on an inner circumferential surface of the valve body 1, and the sliding slot 1b penetrates an end surface of the opening of the valve body 1, when the valve cap 2 is installed, the valve cap 2 is first placed right above the opening end of the valve body 1, and a clip 2a1 on the valve cap 2 is opposite to the sliding slot 1b, then the valve cap 2 is inserted into the valve body 1, so that the clip 2a1 is extruded into the sliding slot 1b, and after the valve cap 2 is inserted, the clip 2a1 on an outer circumferential surface of a deformation portion 2a is extruded into the sliding slot 1b, because the deformation portion 2a has elasticity, so buckle 2a1 on deformation portion 2a outer peripheral face receives the extrusion of valve body 1 inner peripheral face and makes deformation portion 2a inwards deform for deformation portion 2 a's periphery diameter reduces, continues to insert the back with valve gap 2 hard, makes buckle 2a1 break away from in 1b inner wall card income draw-in groove 1a of spout, and deformation portion 2a rebounds to initial position simultaneously, thereby realizes the fixed between valve gap 2 and the valve body 1.

In addition, after the buckle 2a1 is clamped into the clamping groove 1a, two side walls of the buckle 2a1 abut against two side groove walls of the clamping groove 1a, so that when the water meter check valve works, even if the valve cover 2 and the valve body 1 receive the rotating acting force generated by fluid under the action of water pressure, the buckle 2a1 on the valve cover 2 can also receive the resistance of the two side walls in the clamping groove 1a, and cannot deflect relative to the valve body 1, so that the circumferential fixation between the valve cover 2 and the valve body 1 is realized, the self-separation of the valve cover 2 and the valve body 1 when the check valve works is prevented, and the installation stability of the water meter check valve is improved.

Simultaneously, because spout 1b is just to the intercommunication with draw-in groove 1a, so the user can directly aim at spout 1b earlier when not inserting valve gap 2, can directly go into draw-in groove 1a with buckle 2a1 card after inserting valve gap 2 through spout 1b, prevent that the user from taking place the condition that buckle 2a1 is to inaccurate draw-in groove 1a when valve gap 2 and valve body 1 assemble, further improvement this water gauge check valve's installation stability.

As shown in fig. 1-4, after the valve cap 2 is mounted on the valve body 1, the valve cap 2 may extrude the valve element 3 to compress the spring 4, the valve element 3 may abut against the conical surface 2a2 in the deformation portion 2a due to the acting force of the spring 4 to form a pre-tightening force, so that a seal is formed between the valve element 3 and the valve cap 2, the fixing ring 5 is sleeved on the valve body 1, and one side of the fixing ring 5 abuts against the valve cap 2 first, thereby further enhancing the sealing performance between the valve cap 2 and the valve body 1. And after the installation is finished, the check valve is installed in the joint of the water meter and the water pipe.

As shown in fig. 3 and 4, the clip 2a1 is provided with an abutting surface 2a11 and a guiding surface 2a12, when the valve cap 2 is inserted into the valve body 1, the guiding surface 2a12 abuts against the sliding groove 1b in the port of the valve body 1 first, after the valve cap is inserted continuously, the guiding surface 2a12 is pressed to make the deformation portion 2a contract inwards to reduce the outer diameter, the guiding surface 2a12 loses the pressing force from the valve body 1 after passing through the sliding groove 1b, so that the deformation portion 2a rebounds to the initial position, the clip 2a1 is clipped into the slot 1a, the abutting surface 2a11 abuts against the inner wall of the slot 1a near the valve cap 2 side, the fixation between the valve cap 2 and the valve body 1 is realized, the acute angle between the abutting surface 2a11 and the guiding surface 2a12 is arranged, so that the guiding function is provided when the guiding surface 2a12 is clipped into the sliding groove 1b, and the deformation portion 2a12 is gradually reduced inwards in the installation process, avoided appearing exerting oneself suddenly and leading to the condition of deformation portion 2a rupture to appear to promoted the stability of installation in-process between valve gap 2 and the valve body 1, and case 3 still can promote valve gap 2 and make the inner wall that supports face 2a11 on buckle 2a1 and draw-in groove 1a is close to valve gap 2 one side to paste mutually under the 4 power of spring, thereby made the installation between valve gap 2 and the valve body 1 more stable firm.

As shown in fig. 3, a sealing portion 3a is disposed at one end of the valve core 3 close to the bonnet 2, the spring 4 abuts between the sealing portion 3a and the valve body 1, a sealing groove 3a1 is disposed on the sealing portion 3a, a sealing ring 3a2 is disposed in the sealing groove 3a1, and the sealing portion 3a makes the sealing ring 3a2 abut against the conical surface 2a2 of the deformation portion 2a under the action of the spring 4 to complete sealing.

As shown in fig. 1-4, a plurality of ribs 1c are uniformly distributed on the valve body 1 along the circumferential direction, a convex block 3a3 is arranged on the sealing portion 3a, the convex block 3a3 is located between two adjacent ribs 1c, and the convex block 3a3 extends out of the valve body 1. as the valve core 3 is installed in the valve body 1, the circumferential direction is not fixed, when the valve core 3 rotates circumferentially in the working state, the convex block 3a3 arranged on the sealing portion 3a of the valve core 3 can abut against the ribs 1c on two sides to realize circumferential spacing, thereby preventing the reduction of the installation stability of the valve core 3 due to excessive circumferential rotation of the valve core 3.

As shown in fig. 1-4, the working principle of the check valve of the water meter is as follows: this water gauge check valve installs the junction to water gauge and water pipe, when using, rivers flow into and are used in case 3 from valve gap 2 one end, the effort of rivers is greater than spring 4 and is used in 4 power backs of the spring on case 3, rivers can back down case 3 and extrude spring 4 once more and make and no longer form sealedly between case 3 and the valve gap 2, thereby make rivers flow into in the valve body 1 through valve gap 2, the rethread valve body 1 flows into in the water pipe, after the water pressure in the water pipe appears is greater than the water pressure in the water gauge, spring 4 pushes away case 3 once more and makes case 3 support again and form sealedly on leaning on the conical surface 2a2 in deformation portion 2a, thereby realized the non return function of this water gauge check valve.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims (8)

1. The utility model provides a water gauge check valve, includes upper end open-ended valve body (1) and connects in valve gap (2) of valve body (1) opening part, is provided with buckle (2a1) on valve gap (2), is provided with case (3) in valve body (1), and the cover is equipped with on case (3) can let case (3) support and lean on to valve gap (2) and form sealed spring (4), its characterized in that, valve body (1) go up and radially run through and be provided with draw-in groove (1a), buckle (2a1) are detained on the roof of draw-in groove (1a), and the both sides wall of buckle (2a1) offsets with the both sides cell wall of draw-in groove (1a) and lean on, be provided with on the inner peripheral surface of valve body (1) just to spout (1b) and spout (1b) that communicate with draw-in groove (1a) and run through an open-ended terminal surface of valve body (1).

2. A check valve of a water meter as claimed in claim 1, wherein an end of the valve cover (2) facing the opening of the valve body (1) is connected to a deformation portion (2a) having a ring shape and elasticity, and the latch (2a1) is disposed on an outer peripheral surface of the deformation portion (2 a).

3. A check valve for water meter as claimed in claim 2, wherein said clip (2a1) has an abutting surface (2a11) and a guiding surface (2a12), the abutting surface (2a11) and the guiding surface (2a12) form an acute angle, and the abutting surface (2a11) abuts against the inner wall of the side of the slot (1a) close to the valve cover (2).

4. A check valve for water meter as claimed in claim 2 or 3, wherein the deformation part (2a) is provided with a conical surface (2a2) on its inner periphery, and the conical surface (2a2) abuts against the end of the valve core (3) close to the valve cover (2) to form a seal.

5. A water meter check valve according to claim 4, characterized in that one end of the valve core (3) close to the valve cover (2) is provided with a sealing part (3a) abutting against the conical surface (2a2), and the spring (4) abuts against between the sealing part (3a) and the valve body (1).

6. A water meter check valve as claimed in claim 5, wherein said sealing portion (3a) is provided with a sealing groove (3a1), and a sealing ring (3a2) is provided in said sealing groove (3a1), and said sealing ring (3a2) abuts against said conical surface (2a 2).

7. A water meter check valve as claimed in claim 5 or 6, wherein a plurality of ribs (1c) are uniformly distributed on the valve body (1) along the circumferential direction, the sealing part (3a) is provided with a projection (3a3), the projection (3a3) is located between two adjacent ribs (1c), and the projection (3a3) extends out of the valve body (1).

8. A water meter check valve according to claim 5 or 6, characterized in that a positioning hole (1d) matched with one end of the valve core (3) far away from the valve cover (2) is arranged in the valve body (1) in a penetrating manner, an annular groove (1e) circumferentially surrounding along the positioning hole (1d) is further arranged in the valve body (1), the annular groove (1e) and the positioning hole (1d) are in the same circle center, one end of the spring (4) abuts against the annular groove (1e), and the other end of the spring abuts against the sealing part (3 a).

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