Connecting valve

Abstract

The utility model discloses a connecting valve which comprises a valve seat, a sealing piece, a valve body and a force application piece. Wherein the valve seat is provided with an inlet end and an outlet end, the two ends of the valve seat are used for being connected with a gas or liquid conveying pipeline respectively, and the two ends of the valve seat can adopt a quick connector mode. The sealing piece is arranged in the valve seat, a hole is formed in the middle of the sealing piece and serves as a medium circulation channel, and the section of the sealing piece is in a V shape. The valve body is connected with the valve seat, an ejector rod is connected in the valve body in a sleeved mode, the ejector rod is provided with a sealing head matched with the sealing piece in shape, the connecting valve can be applied to on-off control of high-pressure gas or hydraulic pressure, the ejector rod is driven by the force application piece to press the sealing piece at the bottom position of the valve body, and due to the fact that a hole is formed in the middle of the sealing piece, the sealing piece is not prone to falling off. The section of the sealing piece is V-shaped, irregular distortion caused by deformation of the sealing piece when the ejector rod is pressed downwards can be well avoided, closure of the connecting valve is achieved, the sealing reliability of the connecting valve is enhanced, and medium leakage is not prone to occurring.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a connecting valve. Background Art

[0002] The mold-specific nitrogen spring (referred to as die nitrogen spring or nitrogen spring or nitrogen cylinder or nitrogen cylinder) is a new type of elastic component using high-pressure nitrogen as the working medium. It is small in size, large in elasticity, long in stroke, stable in operation, precisely manufactured, long in service life (one million times), with a gentle elasticity curve, and no need for pre-tightening, etc. In the high-pressure nitrogen medium system, a connecting valve is required to control the on and off of the high-pressure gas.

[0003] A Chinese patent document with authorization announcement number CN212338275U discloses a connecting valve and piping system, including a hot valve body, the hot valve body including a first water inlet, a first water outlet and a first connecting port, a cold valve body, the cold valve body including a second water inlet, a second water outlet and a second connecting port, and a flow limiting valve core is provided on the cold water pipeline; a connecting pipe, the two ends of the connecting pipe are respectively connected to the first connecting port and the second connecting port, and the first connecting pipeline and the second connecting pipeline are connected by the connecting pipe; a one-way adjustment valve group, the one-way adjustment valve group includes a one-way valve core and an adjustment valve core, the one-way valve core is installed on the second connecting pipeline, and the adjustment valve core is used to adjust the opening force of the one-way valve core.

[0004] For another example, a Chinese patent document with application publication number CN114992353A discloses a ball valve for high-temperature and high-pressure gas transportation, including a first valve body; a second valve body, the second valve body is arranged at the side end of the first valve body, the side end of the first valve body is fixedly connected to a first rectangular frame, the side end of the second valve body is fixedly connected to a second rectangular frame, and the side ends of the second rectangular frame and the first rectangular frame are threadedly connected with threaded bolts.

[0005] As the applicant conducted further research, it was found that the connecting valve in the prior art solution is a block-shaped sealing part that can be sealed with the sphere. Since the sealing part is conventionally set, the sealing part undergoes irregular twisting and deformation during the contact between the sphere and the block-shaped sealing part, and its sealing reliability is not strong. Since this type of valve is mainly used to cut off the medium of high-pressure gas, the gas has strong permeability, and this type of connecting valve is prone to leakage. Utility Model Content

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A connecting valve comprises a valve seat, a sealing member, a valve body and a force applying member;

[0008] The valve seat has an inlet end and an outlet end, and the two ends are respectively used to connect with gas or liquid delivery pipelines, and the two ends can be in the form of quick connectors.

[0009] The sealing member is arranged in the valve seat, with a hole in the middle serving as a passage for the medium to flow, and the cross section of the sealing member is V-shaped;

[0010] A valve body connected to the valve seat, a push rod sleeved in the valve body, and the push rod has a sealing head conforming to the sealing element; and

[0011] A force-applying member, used for controlling the movement of the push rod in the valve body to make the sealing head approach or move away from the sealing member;

[0012] After the push rod is inserted into the sealing member for engagement, the connecting valve is in a cut-off state.

[0013] Furthermore, a sealing ring cooperating with the end face of the sealing member is provided at the tail of the sealing head.

[0014] Furthermore, a support ring sleeved on the outer circumference of the sealing head is arranged in the valve body, and the sealing member is in contact with the inner wall of the support ring, and a through hole is opened on the circumference of the support ring.

[0015] Furthermore, the valve seat is provided with a first channel and a second channel respectively connected to the inlet end and the outlet end.

[0016] Furthermore, the first channel is communicated with the bottom of the sealing member.

[0017] Furthermore, the plane where the second channel is located is higher than the plane where the first channel is located.

[0018] Furthermore, the force applying member includes a rotating portion threadedly connected to the valve body.

[0019] Furthermore, a sliding member sleeved on the outer periphery of the push rod is arranged on the top of the valve body, and the rotating part is connected to the sliding member through a threaded pin.

[0020] Furthermore, the sliding member is fixed to the tail of the push rod through a retaining spring.

[0021] Furthermore, the force applying member includes a lifting and pressing portion connected to the push rod.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The connecting valve can be used for on-off control of high-pressure gas or hydraulic pressure. Driven by the force-applying member, the push rod presses the seal to the bottom of the valve body. Since a hole is provided in the middle of the seal, the cross section of the seal is V-shaped, which can effectively avoid irregular distortion caused by deformation of the seal when the push rod is pressed down, thereby realizing the flow cutoff of the connecting valve, enhancing its sealing reliability, and preventing leakage of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of a connecting valve of the utility model;

[0025] Figure 2 This is a schematic diagram of the top view of a connecting valve embodiment of the utility model;

[0026] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0027] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0028] Figure 5 for Figure 2 Schematic diagram of the half-section structure of DD;

[0029] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0030] The reference numerals in the drawings of the specification include:

[0031] Valve seat 1, inlet end 10, first channel 100, outlet end 11, second channel 110, seal 2, valve body 3, push rod 4, sealing head 40, sealing ring 400, support ring 5, through hole 50, sliding part 6, threaded pin 60, retaining ring 61, force applying part 7, O-ring 8. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0033] Among them, the drawings are only used for exemplary explanations, and they only show schematic diagrams rather than actual drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted, and the same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar parts; in the description of the utility model, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like appear, the directions or positional relationships indicated are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, so the terms describing the positional relationship in the drawings are only used for exemplary explanations, and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] like Figure 1 - Figure 6 As shown, a connecting valve of the utility model comprises a valve seat 1, a sealing member 2, a valve body 3 and a force applying member 7;

[0035] The valve seat 1 has an inlet end 10 and an outlet end 11, and both ends are respectively used to be connected to gas or liquid delivery pipelines, and both ends can be in the form of quick connectors.

[0036] The sealing member 2 is arranged in the valve seat 1, and a hole is opened in the middle as a passage for the medium to flow, and the cross section of the sealing member 2 is V-shaped;

[0037] The valve body 3 is connected to the valve seat 1 by threads, and a push rod 4 is sleeved inside the valve body 3. The push rod 4 has a sealing head 40 that is conformable to the sealing member 2. The sealing head 40 is slightly larger than the hole of the sealing member 2. When the sealing head 40 extends into the middle of the sealing member 2, the sealing member 2 is subjected to an outward squeezing force from the sealing head 40, and the outer walls of the two members fit tightly together.

[0038] The force applying member 7 is used to control the movement of the push rod 4 in the valve body 3 so that the sealing head 40 is close to or away from the sealing member 2;

[0039] After the push rod 4 extends into the sealing member 2 to engage with the sealing member 2, the connecting valve is in a cut-off state.

[0040] The connecting valve can be used for on-off control of high-pressure gas or hydraulic pressure. Driven by the force-applying member 7, the push rod 4 presses the sealing member 2 against the bottom position of the valve body 3. Since a hole is provided in the middle of the sealing member 2, the cross section of the sealing member 2 is V-shaped, which can effectively avoid irregular distortion caused by deformation of the sealing member 2 when the push rod 4 is pressed down, thereby realizing the flow cutoff of the connecting valve, enhancing its airtight reliability, and preventing leakage of the medium.

[0041] In addition, a sealing ring 400 that cooperates with the end surface of the sealing member 2 is provided at the tail end of the sealing head 40. When the push rod 4 moves downward to the maximum stroke, the sealing ring 400 is tightly attached to the upper surface of the sealing member 2, further enhancing its airtightness.

[0042] A support ring 5 sleeved on the outer circumference of the sealing head 40 is arranged in the valve body 3, and the sealing member 2 is in contact with the inner wall of the support ring 5. A through hole 50 is opened on the circumference of the support ring 5.

[0043] The valve seat 1 is provided with a first channel 100 and a second channel 110 which are connected with the inlet end 10 and the outlet end 11 respectively.

[0044] When the push rod 4 moves upward and its sealing head 40 is separated from the sealing member 2, when the connecting valve is in a flow state, the external medium enters the support ring 5 from the bottom of the sealing member 2 through the hole through the first channel 100, and flows through the circumferential through hole 50 of the support ring 5, and finally flows out from the second channel 110, thereby realizing the medium circulation of the pipelines on both sides of the connecting valve.

[0045] Specifically, the first channel 100 is connected to the bottom of the sealing member 2 , and the plane where the second channel 110 is located is higher than the plane where the first channel 100 is located.

[0046] The connecting valve is designed with low inlet and high outlet, so as to reduce the flow resistance and save effort when opening the connecting valve.

[0047] It should be noted that the force-applying member 7 has various structural types, and can realize the function of moving the push rod 4, such as taking the form of a rotating part threadedly connected to the valve body 3, or taking the form of a pressure-lifting part directly connected to the push rod 4. The specific structural form is not limited.

[0048] Taking the rotating part as an example, a blind hole is provided in the middle for the rear end of the push rod 4 to be inserted, and a thread is provided on the inner wall of the blind hole to match the external thread of the valve body 3. When the force-applying member 7 is turned clockwise or counterclockwise by hand, the force-applying member 7 drives the push rod 4 to move upward or downward through the sliding member 6.

[0049] In addition, the sliding member 6 is arranged on the top of the valve body 3 and is sleeved on the outer periphery of the top rod 4. A threaded hole is opened on the side of the rotating part. The sliding member 6 is connected to the rotating part through the threaded pin 60. Specifically, the cross-section of the sliding member 6 is I-shaped, and the head of the threaded pin 60 extends into the groove on the side of the sliding member 6. This arrangement makes disassembly and assembly more convenient.

[0050] In addition, in order to prevent the sliding member 6 from detaching from the tail of the push rod 4 and driving the push rod to lift, a slot can be opened on the push rod 4. The sliding member 6 is fixed to the outer periphery of the tail of the push rod 4 through the cooperation of the retaining spring 61 and the slot. The retaining spring 61 is preferably an E-type retaining spring 61 (E-type retaining ring), which plays a role in preventing the sliding member 6 from axial movement.

[0051] An O-ring 8 is provided at the upper end of the support ring 5 and sleeved on the outer periphery of the push rod 4. The O-ring 8 can also be provided at the connection between the valve seat 1 and the valve body 3 to further prevent the medium from leaking out. Figure 3 , Figure 4 shown.

[0052] The above are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A connecting valve, characterized in that: include: A valve seat having an inlet end and an outlet end; A sealing member, which has a V-shaped cross section and is disposed in the valve seat; A valve body connected to the valve seat, a push rod sleeved in the valve body, and the push rod has a sealing head conforming to the sealing element; and A force-applying member, used for controlling the movement of the push rod in the valve body to make the sealing head approach or move away from the sealing member; After the push rod is inserted into the sealing member for engagement, the connecting valve is in a cut-off state.

2. A connecting valve according to claim 1, characterized in that: The tail of the sealing head is provided with a sealing ring matched with the end face of the sealing member.

3. A connecting valve according to claim 1 or 2, characterized in that: A support ring sleeved on the outer circumference of the sealing head is arranged in the valve body, and the sealing member is in contact with the inner wall of the support ring. A through hole is opened on the circumference of the support ring.

4. A connecting valve according to claim 3, characterized in that: The valve seat is provided with a first channel and a second channel which are connected with the inlet end and the outlet end respectively.

5. A connecting valve according to claim 4, characterized in that: The first channel is communicated with the bottom of the sealing member.

6. A connecting valve according to claim 4 or 5, characterized in that: The plane where the second channel is located is higher than the plane where the first channel is located.

7. A connecting valve as claimed in claim 1 or 2 or 4 or 5, characterized in that: The force applying member includes a rotating portion threadedly connected to the valve body.

8. A connecting valve according to claim 7, characterized in that: A sliding piece sleeved on the outer periphery of the push rod is arranged on the top of the valve body, and the rotating part is connected with the sliding piece through a threaded pin.

9. A connecting valve according to claim 8, characterized in that: The sliding piece is fixed to the tail of the push rod through a clamping spring.

10. A connecting valve as claimed in claim 1 or 2 or 4 or 5, characterized in that: The force applying member comprises a lifting and pressing portion connected to the ejector rod.

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