阅读说明：本技术 一种具有指示功能的气体切换阀 (Gas switching valve with indicating function ) 是由 俞建国 于 2020-07-14 设计创作，主要内容包括：本发明公开了一种具有指示功能的气体切换阀,包括：阀壳,内部构成有阀腔,并于阀壳外部构成有连通至阀腔的两个进气口和一个出气口；阀芯,容置于阀腔内,并能够在两个进气口通入的气流作用下左右活动,用以切换两个进气口与阀腔之间的封堵或连通状态；指示构件,一端固连阀芯并能够随着阀芯左右活动,另一端至少一部分能够穿出阀壳外部,用以指示阀芯的工作状态。其技术方案使得操作人员能够通过目测指示构件而方便快捷的判定气体切换阀的实时工作状态,以直接确定系统的供气侧及备用侧,避免因判断出错而做出的误操作,安全性更高。(The invention discloses a gas switching valve with an indicating function, which comprises: the valve shell is internally provided with a valve cavity, and two air inlets and one air outlet communicated with the valve cavity are formed outside the valve shell; the valve core is accommodated in the valve cavity and can move left and right under the action of air flows introduced from the two air inlets so as to switch the plugging or communication state between the two air inlets and the valve cavity; and one end of the indicating component is fixedly connected with the valve core and can move left and right along with the valve core, and at least one part of the other end of the indicating component can penetrate out of the valve shell to indicate the working state of the valve core. The technical scheme enables an operator to conveniently and quickly judge the real-time working state of the gas switching valve through visual inspection of the indicating component so as to directly determine the gas supply side and the standby side of the system, avoid misoperation caused by judgment errors and achieve higher safety.)

1. A gas switching valve having an indicating function, comprising:

the valve comprises a valve shell (1), wherein a valve cavity is formed inside the valve shell (1), and two air inlets (13) and an air outlet (14) which are communicated with the valve cavity are formed outside the valve shell (1);

the valve core (2) is accommodated in the valve cavity and can move left and right under the action of air flow introduced from the two air inlets (13) so as to switch the plugging or communication state between the two air inlets (13) and the valve cavity;

and one end of the indicating component (5) is fixedly connected with the valve core (2) and can move left and right along with the valve core (2), and at least one part of the other end of the indicating component can penetrate out of the valve shell (1) to indicate the working state of the valve core (2).

2. The gas switching valve with indicating function according to claim 1, further comprising a limiting structure (7) disposed in the valve chamber for limiting the position of the valve core (2).

3. The gas switching valve with the indication function according to claim 2, wherein the valve core sleeve (3) is fixedly installed in the valve cavity, the valve core (2) is inserted into an inner hole of the valve core sleeve (3), at least one limit groove (32) is formed on an inner hole wall of the valve core sleeve (3) in a recessed manner, the valve core (2) is radially provided with an installation hole (21) at least one end of which penetrates through to the outside, an elastic member (71) is installed in the installation hole (21), at least one end of the elastic member (71) is provided with a limit piece (72), the limit piece (72) can be pushed into the limit groove (32) under the action of the elastic member (71), and the limit structure (7) is formed by the limit groove (32), the limit piece (72) and the elastic member (71).

4. The gas switching valve with indicating function according to claim 3, wherein both ends of the mounting hole (21) radially penetrate the spool (2), and both ends of the elastic member (71) are provided with the stoppers (72).

5. The gas switching valve with indicating function according to claim 3, wherein the number of the retaining grooves (32) is two sets arranged along the length direction of the spool case (3), and each set includes two retaining grooves (32) arranged in a mirror image.

6. The gas switching valve with indicating function according to claim 4, wherein the elastic member (71) is a spring, the stopper (72) is a steel ball, and a washer (73) is provided at each end of the spring, and one side of the steel ball abuts against the washer (73).

7. The gas switching valve with the indicating function according to claim 1 or 3, wherein the indicating member (5) is in an L shape as a whole, and comprises a positioning pin (51) and a sliding indicating rod (52), and one end of the positioning pin (51) is radially inserted into the valve core (2); one end of the sliding indicating rod (52) is connected with one end, deviating from the valve core (2), of the positioning pin (51), and the other end of the sliding indicating rod penetrates through a hole groove axially formed in the valve shell (1) and can penetrate out of the valve shell (1).

8. The gas switching valve with indicating function according to claim 7, wherein the indicating member (5) further comprises an O-ring (54) and a sliding rod screw (53) which are sleeved on the outer circumference of the sliding indicating rod (52), and the O-ring (54) and the sliding rod screw (53) are sequentially fixed in the hole groove.

9. The gas switching valve with indication function according to claim 3, wherein the valve core sleeve (3) is generally cylindrical, the outer peripheral wall of the valve core sleeve (3) is annularly recessed inwards, and forms an annular space with the inner wall of the valve cavity, and a plurality of vent holes (21) communicating the annular space with the inner hole are radially formed on the valve core sleeve (3) for allowing the gas flow in the valve cavity to pass through and flow towards the gas outlet (14).

10. The gas switching valve with indicating function according to claim 1, wherein the valve housing (1) comprises a left valve body (11) and a right valve body (12) which are screwed into one body from left to right, and the two gas inlets (13) are respectively formed at a left end of the left valve body (11) and a right end of the right valve body (12), the gas outlet (14) is formed at a side portion of the left valve body (11), and a gas outlet joint (6) is screwed into the gas outlet (14).

Technical Field

The invention relates to the technical field of gas supply system equipment, in particular to a gas switching valve with an indicating function.

Background

Gas supply systems in various fields such as industry and medical treatment need uninterrupted gas supply, and the types and pressure grades of the supplied gas are different; for example, common gas species are oxygen, hydrogen, nitrogen, argon, helium, carbon dioxide gas, acetylene, propane, and the like; the pressure grades are high, medium and low, such as 15MPa, 10MPa, 6MPa, 2.5MPa and 1.5 MPa; in order to realize uninterrupted gas supply, two gas sources are adopted, wherein one gas source is a working gas source, and the other gas source is a standby gas source; when the pressure of the working air source is reduced to a preset value, switching the air supply source, namely starting to supply air by using a standby air source to become a working air source, and using the original working air source as the standby air source; repeating the above steps, and realizing uninterrupted gas supply to the output end.

Referring to the chinese patent CN106594317B, "a dual air supply source switching valve", discloses a dual air supply source switching valve, which comprises a valve body and a valve core slidably accommodated in the valve body; the valve comprises a valve body, a valve core, a first control cavity, a second control cavity and a valve core, wherein the valve core is arranged in the valve body, the end face of the large-section of the valve core is arranged in the valve body, the first control cavity is arranged in the valve core, the second control cavity is arranged between the first air inlet and the output port, the second control cavity is arranged between the second air inlet and the output port, the pressure of the control cavities on two sides is controlled by introducing conveyed gas or drainage gas into the first control cavity or the second control cavity, the second control cavity is closed when the first air.

Obviously, the above patent can realize the purpose of uninterrupted gas supply, but for the operator, the gas supply side and the standby side of the system cannot be seen in the use process of the gas supply of the system, so that the operation and judgment of the user are easily affected, and potential safety hazards exist.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide a gas switching valve with indication function, which can conveniently and quickly determine the real-time working status of the gas switching valve to directly determine the gas supply side and the standby side of the system, so as to overcome the above technical drawbacks.

The specific technical scheme is as follows:

a gas switching valve with an indicating function, comprising:

the valve shell is internally provided with a valve cavity, and two air inlets and one air outlet communicated with the valve cavity are formed outside the valve shell;

the valve core is accommodated in the valve cavity and can move left and right under the action of air flows introduced from the two air inlets so as to switch the plugging or communication state between the two air inlets and the valve cavity;

and one end of the indicating component is fixedly connected with the valve core and can move left and right along with the valve core, and at least one part of the other end of the indicating component can penetrate out of the valve shell to indicate the working state of the valve core.

Preferably, the valve further comprises a limiting structure arranged in the valve cavity and used for limiting the position of the valve core.

Preferably, a valve core sleeve is fixedly installed in the valve cavity, the valve core penetrates through an inner hole of the valve core sleeve, at least one limiting groove is formed in the inner hole wall of the valve core sleeve in a recessed mode, at least one mounting hole with one end penetrating to the outside is radially formed in the valve core, an elastic member is accommodated in the mounting hole, a limiting part is arranged at least one end of the elastic member, the limiting part can be pushed into the limiting groove under the action of the elastic member, and a limiting structure is formed by the limiting groove, the limiting part and the elastic member together.

Preferably, both ends of the mounting hole radially penetrate through the valve core, and both ends of the elastic member are provided with limiting parts.

Preferably, the number of the limiting grooves is two groups arranged along the length direction of the valve core sleeve, and each group comprises two limiting grooves arranged in a mirror image mode.

Preferably, the elastic member is a spring, the limiting member is a steel ball, and two ends of the spring are respectively provided with a washer, and one side of the steel ball abuts against the washer.

Preferably, the whole indicating component is L-shaped and comprises a positioning pin and a sliding indicating rod, and one end of the positioning pin is radially inserted on the valve core; one end of the sliding indication rod is connected with one end of the positioning pin, which deviates from the valve core, and the other end of the sliding indication rod is arranged in a hole groove axially formed in the valve shell in a penetrating manner and can penetrate out to the outside of the valve shell.

Preferably, the indication member further comprises an O-ring and a sliding rod screw, which are sleeved on the periphery of the sliding indication rod, and the O-ring and the sliding rod screw are sequentially and fixedly arranged in the hole groove.

Preferably, the valve core sleeve is cylindrical, the peripheral wall of the valve core sleeve is annularly and inwards sunken, an annular space is formed between the peripheral wall of the valve core sleeve and the inner wall of the valve cavity, and a plurality of air holes communicated with the annular space and the inner hole are radially formed in the valve core sleeve and used for allowing the air flow in the valve cavity to pass through and flow towards the air outlet.

Preferably, the valve casing includes that the left valve body and the right valve body that connect soon about as an organic whole, and two air inlets constitute respectively in the left end of left valve body and the right-hand member of right valve body, and the gas outlet constitutes in the lateral part of left valve body, and has connect the joint of giving vent to anger in the gas outlet in the spiral shell.

The beneficial effects of the above technical scheme are that:

the gas switching valve with the indicating function comprises a valve casing, a valve core and an indicating component, so that an operator can conveniently and quickly judge the real-time working state of the gas switching valve through visual indication of the indicating component, the gas supply side and the standby side of a system are directly determined, misoperation caused by judgment error is avoided, and the safety is higher.

Drawings

Fig. 1 is an exploded view of a gas switching valve having an indicating function according to the present invention;

FIG. 2 is a cross-sectional view of a gas switching valve having an indicating function according to the present invention;

FIG. 3 is an exploded view of the valve core and indicating member of the gas switching valve with indicating function according to the present invention;

fig. 4 is a schematic diagram of a specific application of the gas switching valve with indication function of the present invention.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described with reference to the attached drawings. And defines the up-down and left-right directions as viewed on the paper surface in fig. 2 as the up-down and left-right directions in this embodiment.

Referring to fig. 1 to 4, the gas switching valve with an indication function according to the present embodiment includes:

the valve comprises a valve casing 1, a valve cavity is formed inside the valve casing 1, and two air inlets 13 and an air outlet 14 communicated with the valve cavity are formed outside the valve casing 1;

the valve core 2 is accommodated in the valve cavity and can move left and right under the action of air flow introduced from the two air inlets 13 so as to switch the plugging or communication state between the two air inlets 13 and the valve cavity;

and one end of the indicating component 5 is fixedly connected with the valve core 2, at least one part of the other end of the indicating component can penetrate out of the valve shell 1, and the indicating component 5 can move left and right along with the valve core 2 and is used for indicating the working state of the valve core 2.

In a specific application, when one of the two air inlets 13 is filled with air flow, the valve core 2 is moved towards the other air inlet 13 under the action of air pressure until the other air inlet 13 is blocked by the valve core 2, and at the moment, the air flow is filled into the air inlet 13 in a conducting state and flows out from the air outlet 14 through the valve cavity. When the air inlets 13 need to be switched and used, the ventilation states of the two air inlets 13 are changed, and the valve core 2 is reversely pushed to block the air inlet 13 which is not communicated with the air flow under the action of the air pressure, so that the function of the switching valve is realized. And the indicating component 5 moves along with the valve core 2, at least one part of the indicating component 5 can extend out of the valve casing 1, and the position of the valve core 2 can be judged by two states that the indicating component 5 extends out of the valve casing 1 and retracts into the valve casing 1, so that an operator can conveniently and directly judge the working state of the gas switching valve by visual observation.

Based on above-mentioned technical scheme, gas switching valve with instruction function includes valve casing 1, case 2 and indicating member 5 for operating personnel can be through visual observation indicating member 5 and convenient and fast's the real-time operating condition of judging gas switching valve, with the gas supply side and the reserve side of direct definite system, avoid because of judging the maloperation of making mistakes and make, the security is higher.

In a preferred embodiment, the gas switching valve with indication function further comprises a limiting structure 7 arranged in the valve cavity for limiting the position of the valve core 2. Further, a valve core sleeve 3 is fixedly installed in the valve cavity, the valve core 2 is arranged in an inner hole of the valve core sleeve 3 in a penetrating mode, at least one limiting groove 32 is formed in the inner hole wall of the valve core sleeve 3 in a recessed mode, an installation hole 21 is radially formed in the valve core 2, at least one end of the installation hole 21 penetrates through the outside, an elastic member 71 is arranged in the installation hole 21, a limiting part 72 is arranged at least one end of the elastic member 71, the limiting part 72 can be pushed into the limiting groove 32 under the action of the elastic member 71, and the limiting structure 7 is formed by the limiting groove 32, the limiting part 72 and the elastic member 71 together and used for limiting the position of the valve core 2. Further, both ends of the mounting hole 21 radially penetrate through the valve element 2, and both ends of the elastic member 71 are provided with stoppers 72. Further, the number of the limiting grooves 32 is two, which are arranged along the length direction of the valve core sleeve 3, and each group includes two limiting grooves 32 arranged in a mirror image manner. Specifically, the positions of the two sets of limiting grooves 32 correspond to the positions of the limiting pieces 72 in the state that the valve core 2 blocks the two air inlets 13. Further, the elastic member 71 is a spring, the stopper 72 is a steel ball, and two ends of the spring are respectively provided with a washer 73, and one side of the steel ball abuts against the washer 73. Further, the limiting groove 32 is conical. However, it is obvious that the elastic member 71 may be a series of materials with elastic characteristics, such as a rubber elastic column, the limiting member 72 may be various block-shaped objects, the limiting groove 32 may be an arc-shaped groove or other groove that can achieve the limiting function and can achieve the limitation releasing state under pushing, and the limiting structure 7 may be a pin-shaped structure, for example, and the limitation is achieved manually, but is not limited thereto.

As a further preferred embodiment, as shown in fig. 2 and 3 in particular, the indicating member 5 is in an "L" shape as a whole, and includes a positioning pin 51 and a sliding indicating rod 52, wherein one end of the positioning pin 51 is radially inserted into the valve core 2; one end of the sliding indication rod 52 is connected with one end of the positioning pin 51 departing from the valve core 2, and the other end is inserted into an axial hole groove formed on the valve housing 1 and can penetrate out of the valve housing 1. Further, the indication member 5 further includes an O-ring 54 and a sliding rod screw 53 sleeved on the outer periphery of the sliding indication rod 52, and the O-ring 54 and the sliding rod screw 53 are sequentially and fixedly installed in the hole groove to perform a sealing function. The positioning pin 51 and the slide indication rod 52 are connected to each other by a screw, but may be connected by a bayonet coupling or the like, or may be welded integrally.

In a preferred embodiment, the valve core sleeve 3 is cylindrical, the outer peripheral wall of the valve core sleeve 3 is annularly and inwardly recessed, and forms an annular space with the inner wall of the valve cavity, and a plurality of air holes 21 communicating the annular space with the inner hole are radially formed on the valve core sleeve 3 to allow the air flow in the valve cavity to pass through and flow towards the air outlet 14. Further, the valve casing 1 includes a left valve body 11 and a right valve body 12 which are screwed into a whole, and two air inlets 13 are respectively formed at the left end of the left valve body 11 and the right end of the right valve body 12, an air outlet 14 is formed at the side of the left valve body 11, and an air outlet joint 6 is screwed into the air outlet 14. Furthermore, the two air inlets 13 are both channel-type structures, one side of the air inlet close to the valve core 2 is a circular groove structure matched with the shapes of the two ends of the valve core 2, and the peripheries of the two ends of the valve core 2 are respectively embedded with a sealing ring 22 for plugging the air inlets 13.

In a specific application, as shown in fig. 4, two air inlets 13 of the gas switching valve 100 are respectively connected to one air bottle group 300 through a pressure reducing valve 200, and the connection purpose is achieved through a pipeline, the air outlet 14 is connected to an external device through a pipeline, when the left air bottle group 300 supplies air, the valve core 2 is pushed rightwards to block the right air inlet 13, at this position, the steel ball is clamped into the limiting groove 32 on the right side, so that the left air bottle group 300 is communicated with the air outlet 14, and the sliding indicating rod 52 is in a state of retracting into the valve housing 1. On the contrary, when the right gas cylinder group 300 supplies gas, the sliding indication rod 52 extends out of the valve housing 1 along with the movement of the valve core 2, so that an operator can directly and intuitively observe and judge the working state of the gas switching valve, the gas cylinder group 300 can be conveniently replaced, and the purpose of uninterrupted continuous gas supply is achieved.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.