CN210372021U

CN210372021U - Stop check valve with scales

Info

Publication number: CN210372021U
Application number: CN201921050492.XU
Authority: CN
Inventors: 徐伟峰
Original assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Current assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-04-21
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a stop check valve with scales, which comprises a valve body, a valve cover, a valve rod, a valve flap frame, a valve flap and the like, wherein a check spring is arranged between the upper end of the valve flap frame and the lower end of the valve rod, so that the valve flap frame can be pushed by the elasticity of the check spring to drive the valve flap to seal a water through hole, thereby the valve has the use functions of stopping and checking simultaneously, and the purpose of one valve for two purposes is achieved; meanwhile, the non-return thrust of the non-return spring borne by the valve clack can be adjusted by the lifting movement of the valve rod, the opening pressure scale is further arranged on the outer circumferential surface of the upper end of the valve rod and can correspond to the adjustable non-return thrust formed by the lifting movement of the identification valve rod, and a user can accurately identify and operate the non-return working state of the valve only by observing the opening pressure scale.

Description

Stop check valve with scales

Technical Field

The utility model relates to a stop valve structure in the valve specifically indicates a take scale stop check valve.

Background

The stop valve is a valve which is widely applied in a pipeline system and has the advantages of simple structure, convenient operation, reliable medium stop, long service life and the like; however, the conventional stop valves do not have a non-return function, and when the pipeline needs to prevent backflow and water return, the pipeline can only be externally connected with a non-return valve for matching use, so that not only is the pipeline installation troublesome, but also the use cost of the pipeline is increased; meanwhile, although other valves with a check function, such as ball valves, gate valves, butterfly valves, etc., are available in the market, the check working states of such valves cannot be accurately identified, and users can only roughly judge or perform fuzzy operation, which brings great inconvenience to the use.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art's defect and provide one kind have simultaneously by with the non return function to can accurately discern with accurate operation non return operating condition take the scale stop check valve.

The technical problem of the utility model is realized through following technical scheme:

a stop check valve with scales comprises a valve body, a water through hole in the valve body, a valve cover and a valve rod, wherein the valve cover is hermetically installed in an installation hole at the top of the valve body, the valve rod is vertically and rotatably installed in the valve cover in a sealing mode, a hand wheel which is installed in a transmission mode is arranged at the upper end of the valve rod and extends out of the valve cover, a valve flap frame and a valve flap which is installed at the lower end of the valve flap frame are arranged at the lower end of the valve rod, the hand wheel drives the valve rod to rotate and convert the valve rod into lifting movement of the valve rod, a check spring is arranged between the upper end of the valve flap frame and the lower end of the valve rod, the valve flap frame is pushed; the adjustable check thrust formed by the lifting movement of the valve rod is marked by the opening pressure scale correspondingly.

The valve rod rises, and the check thrust borne by the check spring on the valve clack is smaller; the valve rod descends, and the larger the non-return thrust borne by the non-return spring on the valve clack is.

The opening pressure scale means that a plurality of ring marks are arranged on the outer circumferential surface of the upper end of the valve rod at equal intervals in sequence from top to bottom, and each ring mark is provided with a scale numerical value.

The scale numerical values are increased from bottom to top in sequence.

The lower end of the valve rod is provided with a blind hole, the upper end of the valve clack frame is correspondingly provided with a short shaft which vertically extends upwards and extends into the blind hole, the check spring is arranged in the blind hole, and the lower end of the check spring is elastically pushed on the short shaft.

The free extension length of the check spring is larger than the blind hole depth of the valve rod at the maximum rising height, and the working compression length of the check spring is larger than the blind hole depth of the valve rod at the maximum falling height.

The length of the short shaft is smaller than the depth of the blind hole minus the working compression length of the check spring, and the length of the short shaft is larger than the maximum rising height of the valve rod.

The upper end of the short shaft is provided with a spring column for elastically pushing and mounting the lower end of the non-return spring.

And mutually meshed transmission threads are arranged between the outer circumferential surface of the valve rod and the inner circumferential surface of the valve cover, and the valve rod rotates and is converted into lifting movement through the transmission threads.

Compared with the prior art, the utility model is mainly characterized in that the non-return spring is arranged between the upper end of the valve flap frame and the lower end of the valve rod, so that the valve flap frame can be pushed by the elasticity of the non-return spring to drive the valve flap to seal the water through hole, thereby the valve has the use functions of stopping and non-return, and the purpose of one valve can be achieved; meanwhile, the valve clack bears the non-return thrust of the non-return spring to be adjustable by the lifting movement of the valve rod, the outer circumferential surface of the upper end of the valve rod is also provided with opening pressure scales which can correspond to the adjustable non-return thrust formed by the lifting movement of the identification valve rod, and a user can accurately identify and operate the non-return working state of the valve only by observing the opening pressure scales.

Drawings

Fig. 1 is a schematic sectional view of the present invention (the valve is in a stop state).

Fig. 2 is a schematic sectional view of the present invention (the valve is in a non-return state).

Fig. 3 is a schematic view of the valve stem.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1-3, the valve comprises a valve body 1, a nut 2, a valve clack 3, a valve clack 4, a valve clack frame 41, a short shaft 42, a spring column 5, a valve rod 51, a blind hole 52, an opening pressure scale 6, a check spring 7, a valve cover 8, a filler 9, a pressing ring 10, a compression nut 11, a hand wheel 12, a transmission thread 13 and a water through hole 13.

A stop check valve with scales, as shown in figures 1 and 2, has the using functions of stopping and stopping, namely, achieves the purpose of dual purposes of one valve, and mainly comprises a valve body 1, a water through hole 13 in the valve body, a valve cover 7 hermetically installed in an installation hole at the top of the valve body 1, a valve rod 5 vertically and rotatably installed in the valve cover 7, and the like.

The upper end of the valve rod 5 extends out of the valve cover 7 and is in transmission installation with the hand wheel 11 through a square shaft structure, and two connecting structures are arranged between the middle part and the valve cover 7, and the connecting structure specifically comprises: when the valve cover 7 is positioned at the top of the valve rod, a packing 8, a pressing ring 9 and a compression nut 10 are arranged between the middle part of the valve rod 5 and the top of the valve cover 7, and mainly play a role in sealing when the valve rod 5 rotates; when the valve rod 5 is positioned at the bottom of the valve cover 7, the transmission threads 12 which are meshed with each other are arranged between the middle part of the valve rod 5 and the bottom of the valve cover 7, namely between the outer circumferential surface of the valve rod 5 and the inner circumferential surface of the valve cover 7, so that the hand wheel 11 drives the valve rod 5 to rotate, and the rotation of the valve rod 5 can be converted into lifting movement through the matching of the transmission threads 12.

Valve rod 5 lower extreme be equipped with valve clack 3, this valve clack passes through 2 fixed mounting of nut at 4 lower extremes of valve clack frame, is equipped with the check spring 6 that adopts corrosion-resistant stainless steel material to make between valve clack frame upper end and the 5 lower extremes of valve rod, concrete structure as follows: the lower end of the valve rod 5 is provided with a blind hole 51, correspondingly, the upper end of the valve flap frame 4 is provided with a short shaft 41 which extends vertically upwards and extends into the blind hole 51, the check spring 6 is arranged in the blind hole 51, and the lower end of the check spring is just elastically pushed and arranged on the spring post 42 at the upper end of the short shaft 41.

Therefore, when the valve rod 5 is at the maximum descending height as shown in fig. 1, the lower end of the valve rod 5 compresses the check spring 6 and directly pushes the valve clack seat 4 and the valve clack 3 to seal the water through hole 13, thereby realizing the stop function of the valve; when the valve rod 5 is at the maximum lifting height as shown in fig. 2, the lower end of the valve rod 5 is separated from the valve flap seat 4, the check spring 6 is in a free extension state, the valve flap seat 4 is pushed by the elasticity of the check spring 6 and under the action of self-weight, the valve flap 3 is driven to seal the water through hole 13, and the valve is in a check working state at the moment.

Meanwhile, the valve clack 3 bears the non-return thrust of the non-return spring 6, and the non-return thrust is adjusted by the lifting movement of the valve rod 5. Namely the valve rod 5 rises, the smaller the check thrust borne by the check spring 6 on the valve clack 3 is, the smaller the opening pressure of the valve is; the valve rod 5 descends, and the larger the check thrust of the check spring 6 borne on the valve clack 3 is, the larger the starting pressure of the valve is.

The mutual relations among the above structures are as follows: the free extension length of the check spring 6 is greater than the depth of the blind hole 51 when the valve rod 5 is at the maximum rising height, and the working compression length of the check spring 6 is greater than the depth of the blind hole 51 when the valve rod 5 is at the maximum falling height, namely when the valve is closed; and the length of the short shaft 41 is less than the depth of the blind hole 51 minus the working compression length of the check spring 6, and the length of the short shaft 41 is greater than the maximum rising height of the valve rod 5.

In addition, the outer circumferential surface of the upper end of the valve rod 5 is also provided with opening pressure scales 52, and the opening pressure scales correspond to the adjustable non-return thrust formed by the lifting movement of the marking valve rod 5; the opening pressure scale 52 is a plurality of ring marks which are sequentially arranged on the outer circumferential surface of the upper end of the valve rod at equal intervals from top to bottom, each ring mark is provided with a scale numerical value, the scale numerical values are sequentially increased from bottom to top, the opening pressure scale 52 of the embodiment comprises three ring marks, and each ring mark is respectively provided with three scale numerical values of 0.01MPa, 0.02MPa and 0.03MPa from bottom to top, namely the opening pressure scales respectively correspond to the three numerical values, so that a user can accurately identify and operate the non-return working state of the valve by observing the opening pressure scale 52.

The check spring 6 is additionally arranged between the upper end of the valve flap frame 4 and the lower end of the valve rod 5 of the stop check valve, so that the common stop valve has double functions of stopping and stopping, and the valve flap 3 can be subjected to double functions of self gravity and the thrust of the check spring 6, thereby ensuring good check effect; opening pressure scales 52 are further arranged on the outer circumferential surface of the upper end of the valve rod 5, so that a user can accurately identify and accurately operate the non-return working state of the valve, and the circulation of a pipeline is conveniently controlled; meanwhile, the check spring 6 is arranged in the blind hole 51 at the lower end of the valve rod 5, so that direct scouring of pipeline media is avoided, and the service life of the check spring 6 is prolonged.

The utility model discloses an improve on the basis of original ordinary stop valve and form, most accessories are the general piece, have that the non return is effectual, open advantages such as pressure control is accurate, production is convenient, are the good selection of replacing ordinary stop valve.

Claims

1. A stop check valve with scales comprises a valve body (1), a water through hole (13) in the valve body, a valve cover (7) which is hermetically arranged in a mounting hole at the top of the valve body (1) and a valve rod (5) which is vertically and rotatably and hermetically arranged in the valve cover, a hand wheel (11) which is installed in a transmission way is arranged at the upper end of the valve rod and extends out of the valve cover (7), a valve flap frame (4) and a valve flap (3) which is installed at the lower end of the valve flap frame (4) are arranged at the lower end of the valve rod, the hand wheel (11) drives the valve rod (5) to rotate and converts the rotation into the lifting movement of the valve rod, it is characterized in that a check spring (6) is arranged between the upper end of the valve flap frame (4) and the lower end of the valve rod (5), the valve flap frame (4) is pushed by the elasticity of the check spring (6) to drive the valve flap (3) to seal the water through hole (13), the valve clack (3) bears the non-return thrust of the non-return spring (6) and is adjustable due to the lifting movement of the valve rod (5); an opening pressure scale (52) is arranged on the outer circumferential surface of the upper end of the valve rod (5), and the opening pressure scale correspondingly marks the adjustable non-return thrust formed by the lifting movement of the valve rod (5).

2. A graduated stop-check valve according to claim 1, characterized in that the valve stem (5) rises, the lower the check thrust of the check spring (6) on the flap (3); the valve rod (5) descends, and the larger the check thrust borne by the check spring (6) on the valve clack (3) is.

3. The stop check valve with the scale according to claim 1, wherein the opening pressure scale (52) is a plurality of ring marks which are sequentially arranged on the outer circumferential surface of the upper end of the valve rod (5) at equal intervals from top to bottom, and each ring mark is provided with a scale numerical value.

4. The stop check valve with scale according to claim 3, wherein the scale value increases from bottom to top.

5. The stop check valve with the scale according to claim 1, characterized in that the lower end of the valve rod (5) is provided with a blind hole (51), the upper end of the valve flap frame (4) is correspondingly provided with a short shaft (41) which extends vertically upwards and extends into the blind hole (51), the check spring (6) is arranged in the blind hole (51), and the lower end of the check spring (6) is elastically pushed against the short shaft (41).

6. A scaled stop-check valve according to claim 5, characterized in that the free extension length of the check spring (6) is greater than the depth of the blind hole (51) at the maximum height of the valve rod (5), and the working compression length of the check spring (6) is greater than the depth of the blind hole (51) at the maximum height of the valve rod (5).

7. A scaled stop check valve according to claim 5, characterized in that the length of the short shaft (41) is smaller than the depth of the blind hole (51) minus the working compression length of the check spring (6), the length of the short shaft (41) being greater than the maximum rise height of the valve stem (5).

8. The stop check valve with the scale according to claim 5, characterized in that the upper end of the short shaft (41) is provided with a spring post (42) for elastically pushing and installing the lower end of the check spring (6).

9. A graduated stop-check valve according to claim 1, wherein the valve stem (5) has an outer circumferential surface and an inner circumferential surface with a drive screw (12) engaged with each other, and the valve stem (5) is rotated and converted into an elevating movement by the drive screw (12).