Hydrogen line with integrated relief channel

Abstract

The application relates to the field of valves. A pull-off body of a hydrogenation pipeline integrated with a blow-off channel comprises a pull-off valve body and a gas pipe for connecting a hydrogenation gun, the pull-off valve body is provided with a gas flow channel, a thimble for plugging the gas flow channel is slidably connected in the pull-off valve body, and a reset spring is arranged between the thimble and the pull-off valve body; the pull-off valve body is provided with a blow-off channel, the blow-off channel is used for connecting the atmosphere and the gas flow channel, and the blow-off channel is located between the thimble and the gas pipe; and the pull-off valve body is detachably connected with a valve clack for plugging the blow-off channel. The blow-off channel and the valve clack have the function of actively releasing the internal pressure of the pull-off body. When the pull-off valve body is closed and cannot be discharged, the valve clack is opened, the internal medium gas is discharged through the blow-off channel, the air pressure in the pipeline is restored, and subsequent operation and fault treatment are facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of valves, in particular, a pull-off valve. BACKGROUND

[0002] In the structure of the pull-off valve, the pull-off body assembly is usually connected with the rear end hydrogenation gun and other components through a connecting pipe, and the pull-off body end and the rear end components form a pipe together. However, the existing 70MPa pull-off valve and hydrogenation gun do not have a positive release structure, that is, the pipe formed by the pull-off body and the hydrogenation gun cannot independently and positively release the pressure between them. Under such conditions, the hydrogenation system can normally discharge the pressure in the pipe through the hydrogenation machine in the normal working state. However, when the pull-off valve is pulled off by external force during operation, the ports of the hydrogenation gun and the pull-off body are designed for one-way flow to ensure no leakage to the outside. Therefore, the pipe formed by the pull-off body and the hydrogenation gun will be in a closed state instantaneously, so that a certain high-pressure medium is stored in the pipe. If the pressure in this section cannot be released, the pull-off body and the main valve body cannot be quickly reconnected, and the hydrogenation system cannot quickly return to the normal working state, which is contrary to the requirement of quick fault handling when designing the pull-off valve.

[0003] The traditional pull-off valve has the following defects because the pull-off body does not have an independent and positive release component:

[0004] 1) After the pull-off action, high-pressure gas is closed between the pull-off body and the hydrogenation gun, which is not convenient for fault handling, that is, the hydrogenation system cannot quickly return to work.

[0005] 2) After the pull-off action, the gas closed between the pull-off body and the hydrogenation gun must be released by half-damage, which has a damage risk. SUMMARY

[0006] In view of the problems in the prior art, the present application provides a pull-off body of a hydrogenation pipe integrated with a release channel to solve at least one of the above technical problems.

[0007] In order to achieve the above purpose, the present application provides a pull-off body of a hydrogenation pipe integrated with a release channel, which comprises a pull-off valve body and a gas pipe for connecting a hydrogenation gun connected in sequence. A gas flow channel is formed in the pull-off valve body. The pull-off valve body is slidably connected with a plunger for blocking the gas flow channel. A return spring is installed between the plunger and the pull-off valve body.

[0008] A release channel is formed in the pull-off valve body. The release channel is used to connect the atmosphere and the gas flow channel. The release channel is located between the plunger and the gas pipe.

[0009] A valve disc for blocking the release channel is detachably connected to the pull-off valve body.

[0010] The application has the function of actively releasing the internal pressure of the pull-off body by adding a release channel and a valve disc.

[0011] The valve disc and the pull-off valve body are in a screwed state in the normal state, and achieve a sealing effect between each other to ensure no leakage in the normal state. When the pull-off valve body is closed and cannot be discharged, the valve disc is opened, the internal medium gas is discharged through the release channel, and the air pressure in the pipeline is restored to facilitate subsequent operation and fault handling.

[0012] Further preferably, the valve disc comprises a blocking part, a sliding part and a spiral part connected in sequence along the axial direction;

[0013] The spiral part is provided with an outer thread connected to the pull-off valve body;

[0014] The outer diameter of the blocking part is smaller than the outer diameter of the sliding part, and the outer diameter of the sliding part is smaller than the outer diameter of the spiral part.

[0015] Convenient to install.

[0016] Further preferably, the top of the blocking part is a conical shape with a gradually changing outer diameter.

[0017] Further preferably, the spiral part is provided with a hexagonal groove.

[0018] Convenient to rotate and operate.

[0019] Further preferably, the release channel comprises an inverted T-shaped channel and a release port;

[0020] The inverted T-shaped channel comprises a radial flow channel arranged radially outward and an axial flow channel with an axial flow direction;

[0021] One end of the radial flow channel is connected to the gas flow channel, the other end of the radial flow channel is connected to the center of the axial flow channel, and one end of the axial flow channel adjacent to the gas pipe is connected to the release port;

[0022] The flow direction of the release port is parallel to the flow direction of the axial flow channel.

[0023] Further preferably, the pull-off valve body is provided with a mounting hole for mounting the valve disc, and the mounting hole is in communication with the release channel;

[0024] The mounting hole comprises a sliding groove for sliding connection with the sliding part and a threaded hole for threaded connection with the spiral part;

[0025] A sealing ring is mounted on the inner wall of the sliding groove.

[0026] Convenient to ensure the sealing effect of the installation of the valve disc.

[0027] Further preferably, the top needle comprises, from the side adjacent to the trachea to the side away from the trachea, a spring supporting portion, a flow guiding portion, a sealing portion and a sliding portion connected in sequence;

[0028] The reset spring is sleeved on the periphery of the spring supporting portion;

[0029] The spring supporting portion is a hollow columnar structure;

[0030] The flow guiding portion is provided with a through hole, which communicates the hollow columnar structure and the outer wall of the top needle;

[0031] The sealing portion is used to abut against the inner wall of the pull-off valve body under the action of the reset spring;

[0032] The sliding portion is a cylindrical surface provided with a flow guiding section.

[0033] The sealing portion is used to abut against the inner wall of the pull-off valve body under the action of the reset spring;

[0034] Further preferably, the pull-off valve body is detachably connected with the pull-off main valve;

[0035] The pull-off main valve comprises, from the side adjacent to the pull-off valve body to the side away from the pull-off valve body, a claw sheath, a connecting shell, a connecting valve body and an air inlet valve body connected in sequence;

[0036] The left end of the connecting valve body is detachably connected with a valve core assembly, and the valve core assembly, the connecting valve body and the air inlet valve body are provided with an air inlet flow channel penetrating from left to right;

[0037] The pull-off main valve further comprises a sliding valve body in sliding connection with the valve core assembly and a claw for clamping the pull-off valve body;

[0038] The connecting valve body is rotatably connected with a rotating member, the rotating member is provided with a cam portion, the connecting valve body is provided with a top rod abutting against the sliding valve body, the top rod abuts against the cam portion, and the rotating member is provided with a limiting portion embedded in the top rod on both upper and lower sides of the cam portion;

[0039] The claw sheath and the connecting shell are both in threaded connection with a screw sleeve, and a first reset spring is installed between the screw sleeve and the sliding valve body.

[0040] The screw position of the screw sleeve is used to adjust the elastic force of the first reset spring, and further adjust the pull-off force.

[0041] Further preferably, the left end of the sliding valve body is connected with a main valve needle through a second reset spring, the main valve needle is used to abut against the air outlet end of the sliding valve body, the sliding valve body is provided with a second sealing surface at the position abutted by the main valve needle, and the end of the main valve needle extends out of the left end of the sliding valve body when the main valve needle abuts against the second sealing surface of the sliding valve body.

[0042] The one-way locking is facilitated to be realized.

[0043] Further preferably, the valve core assembly is provided with an air hole extending radially outwardly;

[0044] The outer wall of the valve core assembly is provided with a first limiting surface for limiting the transmission valve body;

[0045] The sliding valve body is provided with a second limiting surface for limiting the valve core assembly, and the air hole is located right to the first limiting surface;

[0046] When the main valve needle abuts against the second sealing surface of the sliding valve body, the air hole is communicated with the region between the first limiting surface and the second limiting surface.

[0047] The air tightness is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a structural schematic view of embodiment 1 of the present application;

[0049] Figure 2 It is a structural schematic view of the needle of embodiment 1 of the present application;

[0050] Figure 3 It is a structural schematic view of embodiment 2 of the present application.

[0051] Wherein, 1 is an air pipe, 2 is a pull-off valve body, 3 is a reset spring, 4 is a needle, 5 is a first sealing element, 6 is an interface valve body, 7 is a second sealing element, 8 is a valve flap, 9 is a hydrogenation gun interface, and A is a blow-off port.

[0052] 41 is a sliding part, 42 is a flow guiding section, 43 is a flow guiding part, and 44 is a spring supporting part.

[0053] 11 is a limiting claw, 12 is a guide claw, 13 is a sliding valve body, 14 is a main valve needle, 15 is a second reset spring, 16 is a clamping claw sheath, 17 is a connecting shell, 18 is a first reset spring, 19 is a spring abutting element, 20 is a valve core assembly, 21 is a top rod, 22 is a rotating element, 23 is a connecting valve body, 24 is a filter element, and 25 is an air inlet valve body. DETAILED DESCRIPTION

[0054] The present application will be further described below in combination with the drawings.

[0055] Referring to Figure 1 and Figure 2 , the specific embodiment 1, the hydrogenation pipeline integrated with the relief channel, including the pull-off valve body 2 and the gas pipe 1 for connecting the hydrogenation gun connected in sequence, the gas flow channel is opened on the pull-off valve body 2, the pull-off valve body 2 is slidably connected with the needle 4 for plugging the gas flow channel, the reset spring 3 is installed between the needle 4 and the pull-off valve body 2; the relief channel is opened on the pull-off valve body 2, the relief channel is used for connecting the atmosphere and the gas flow channel, the relief channel is located between the needle 4 and the gas pipe 1; the pull-off valve body 2 is detachably connected with the valve 8 for plugging the relief channel. The present application has the function of actively relieving the internal pressure of the pull-off body by adding the relief channel and the valve 8. The valve 8 and the pull-off valve body 2 are usually in the state of being screwed, and the sealing effect is achieved between each other, so that no leakage is ensured under normal conditions. When the pull-off valve body 2 is closed and cannot be discharged, the valve 8 is opened, so that the internal medium gas is discharged through the relief channel, so that the air pressure in the pipeline is restored, so as to facilitate subsequent operation and fault handling. The end of the gas pipe 1 is connected with the hydrogenation gun interface 9.

[0056] The valve 8 includes a plugging part, a sliding part and a spiral part connected in sequence along the axial direction; the spiral part is provided with an external thread connected with the pull-off valve body 2, the inside of the threaded part is provided with a hexagonal groove, so as to facilitate the opening and closing action of the valve; the outer diameter of the plugging part is smaller than that of the sliding part, and the outer diameter of the sliding part is smaller than that of the spiral part. It is convenient to install. The top of the plugging part is conical.

[0057] The relief channel includes a reverse T-shaped channel and a relief port A; the reverse T-shaped channel includes a radial flow channel arranged radially outward and an axial flow channel with an axial flow direction; one end of the radial flow channel is connected with the gas flow channel, the other end of the radial flow channel is connected with the center of the axial flow channel, and the end of the axial flow channel adjacent to the gas pipe 1 is connected with the relief port. The flow direction of the relief port is parallel to the flow direction of the axial flow channel.

[0058] The pull-off valve body 2 is provided with a mounting hole for mounting the valve 8, and the mounting hole is in communication with the relief channel; the mounting hole includes a sliding groove for slidably connecting the sliding part and a threaded hole for threadedly connecting the spiral part; the inner wall of the sliding groove is provided with a sealing ring. It is convenient to ensure the sealing effect of the installation of the valve 8.

[0059] The pull-off valve body 2 and the interface valve body 6 are detachably connected to form a cavity for slidably connecting the needle 4. The first sealing member 5 is installed between the pull-off valve body 2 and the interface valve body 6. The second sealing member 7 for connecting the gas cylinder is installed on the interface valve body 6. The end of the needle 4 extends out of the interface valve body 6.

[0060] The top pin 4 comprises, from the side adjacent to the air pipe 1 to the side away from the air pipe 1, a spring supporting part 44, a flow guiding part 43, a sealing part and a sliding part 41 connected in sequence; the reset spring 3 is sleeved on the periphery of the spring supporting part 44; the spring supporting part 44 is a hollow columnar structure; the flow guiding part 43 is provided with a through hole, which leads the hollow columnar structure and the outer wall of the top pin 4; the sealing part is used to abut against the inner wall of the pull-off valve body 2 under the action of the reset spring 3; and the sliding part 41 is a cylindrical surface provided with a flow guiding section 42. The sealing part is convenient for realizing the plugging of the air flow passage, and when the top pin 4 moves to the side of the air pipe 1, the through hole realizes the conduction of the air flow. The air flow passes through the flow guiding section, the flow guiding hole and the hollow columnar structure in sequence and is delivered to the air pipe 1.

[0061] Referring to Figure 3 , in specific embodiment 2, on the basis of specific embodiment 1, the pull-off valve body and the pull-off main valve are detachably connected; the pull-off main valve comprises, from the side adjacent to the pull-off valve body to the side away from the pull-off valve body, a claw sleeve 16, a connecting shell 17, a connecting valve body 23 and an air inlet valve body 25 connected in sequence; the left end of the connecting valve body 23 is detachably connected with a valve core assembly 20, and the valve core assembly 20, the connecting valve body 23 and the air inlet valve body 25 are provided with an air inlet flow channel leading from left to right; the pull-off main valve further comprises a sliding valve body 13 slidably connected with the valve core assembly 20 and a claw for clamping the pull-off valve body; the connecting valve body 23 is rotatably connected with a rotating piece 22, the rotating piece 22 is provided with a cam part, the connecting valve body 23 is provided with a top rod 21 abutting against the sliding valve body 13, the top rod 21 abuts against the cam part, and the rotating piece 22 is provided with a limiting part embedded in the top rod 21 on both sides of the cam part; the claw sleeve 16 and the connecting shell 17 are threadedly connected with a screw sleeve, and the first reset spring 18 is installed between the screw sleeve and the sliding valve body 13. The screw position of the screw sleeve is convenient for realizing the adjustment of the elastic force of the first reset spring 18, and further adjusting the pull-off force.

[0062] A filter element is clamped between the connecting valve body and the air inlet valve body. The filter element comprises a cylinder body and filter steel wires, a partition plate is arranged in the cylinder body, the cylinder body is provided with a through hole arranged in a circumferential direction on both sides of the partition plate, and the filter wire is covered on the periphery of the through hole. The filter element is convenient for realizing the detour of the air flow. A thread cutting groove is arranged on the outer circumference of the cylinder body. The steel wire is wound in the thread cutting groove on the outer circumference of the cylinder body, a very narrow gap is formed between adjacent steel wire coils, and the particles are blocked. The right side of the cylinder body abuts against the inner wall of the air inlet valve body through a spring.

[0063] The claw comprises a guide claw 12 slidably connected with the inner wall of the claw sleeve and a limiting claw 11 for imprisoning the pull-off valve body, and an annular spring is sleeved on the right end of the guide claw and the limiting claw. A clamping part for clamping the pull-off valve body is arranged on the left end of the limiting claw. The clamping part is provided with a tapered surface. The inner diameter of the tapered surface increases from left to right.

[0064] A hexagonal groove is arranged on the top of the rotating piece 22.

[0065] The left end of the valve core assembly 20 is connected with the main valve needle 14 through the second reset spring 15, and the main valve needle 14 is used to abut against the air outlet end of the sliding valve body 13. When the main valve needle 14 abuts against the air outlet end of the sliding valve body 13, the end of the main valve needle 14 extends out of the left end of the sliding valve body 13, so as to facilitate the realization of one-way locking.

[0066] The right end of the pull-apart valve body is provided with a socket for inserting the left end of the sliding valve body. The distance from the left end face of the socket to the end face of the pull-apart valve body abutting against the third reset spring is h1. The distance from the left end face of the sliding valve body to the end face of the sliding valve body abutting against the second reset spring is h2. The axial length of the main valve needle and the needle is H. 2H is less than h1+h2. It is ensured that the connection state is connected without action interference.

[0067] The valve core assembly 20 is provided with a gas hole extending radially outward. The outer wall of the valve core assembly 20 is provided with a first limiting surface for limiting the sliding valve body. The sliding valve body 13 is provided with a second limiting surface for limiting the valve core assembly 20. The gas hole is located to the right of the first limiting surface. When the main valve needle 14 abuts against the sealing surface of the sliding valve body 13, the gas hole is in communication with the area between the first limiting surface and the second limiting surface. It is ensured that the air tightness is guaranteed. The first sealing ring, the second sealing ring and the third sealing ring arranged from left to right are installed between the valve core assembly and the sliding valve body. The first sealing ring is located on the sliding valve body. The second sealing ring is installed on the valve core assembly and located to the left of the first limiting surface. The third sealing ring is installed on the sliding valve body and located to the right of the second limiting surface. The sum of the stress area at the first sealing ring and the stress area at the third sealing ring is equal to the stress area at the second sealing ring.

[0068] The sliding valve body includes a base body and a spring abutting piece 19 arranged left and right. The base body and the spring abutting piece are threadedly connected. The right end of the spring abutting piece is provided with an outwardly extending boss. The left end of the first reset spring abuts against the screw sleeve, and the right end of the first reset spring abuts against the boss.

[0069] Working principle:

[0070] Connection mode: using hexagonal wrench inserted into the rotating part and rotate, the needle on the rotating part cam structure under the action of the left move, and act on the slide valve body, the slide valve body relative to the pull-off main valve left relative movement, and then drive the pawl to the left, rotating part rotation 180° after the pawl pull-out main valve to open state and reach the big displacement position; pull-off valve body into the pawl, push the pull valve body make it with pull-off main valve contact, and push to limit position, the push process said pull-off valve body needle and main valve needle contact each other, and in the push action make the second reset spring and the third reset spring compression, the pull-off valve body needle and main valve needle respectively from the pull-off valve body sealing surface and the sealing surface of the slide valve body, so that the main valve body and pull-off valve body realize flow passage communication; rotating rotating part back to the original position, the process of needle, pawl, slide valve body all reset action, in the process of pawl tightly in the pull-off body assembly, so that the main valve body and pull-off body assembly complete connection.

[0071] Pull-off state: pull-off valve body and pull-off main valve normal connection state, pull-off valve body and pull-off main valve in the axial direction of opposite pull effect, pull-off valve body will drive the pawl to move to the left, this stage the first reset spring elastic force will play the role of preventing pull-off movement, when the moving distance to the connection limit position, pull-off valve body and pull-off main valve disengaged, main valve needle under the action of the second reset spring reset, main valve needle and slide valve body restore mutual contact state, and in the second reset spring elastic force and the gas pressure in the valve under the action of sealing, prevent gas leakage, avoid gas leakage caused by accident and danger.

[0072] The above is only the preferred embodiment of the present application, it should be noted that, for those skilled in the ordinary technical personnel in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A break body of a hydrogen pipeline integrated with a relief channel, comprising a break valve body and a gas pipe for connecting a hydrogen lance, a gas flow channel is arranged on the break valve body, characterized in that, A top pin for blocking the airflow channel is slidably connected in the pull-off valve body, and a return spring is installed between the top pin and the pull-off valve body; A discharge channel is formed in the pull-off valve body, and the discharge channel is used for connecting the atmosphere and the airflow channel, and is located between the top pin and the air pipe; A valve flap for blocking the discharge channel is detachably connected to the pull-off valve body; The pull-off valve body and the interface valve body are detachably connected to form a cavity for slidably connecting the top pin; The pull-off valve body is detachably connected with a pull-off main valve; The pull-off main valve comprises, in sequence from the side adjacent to the pull-off valve body to the side away from the pull-off valve body, a claw sheath, a connecting shell, a connecting valve body, and an air inlet valve body; A valve core assembly is detachably connected to the left end of the connecting valve body, and the valve core assembly, the connecting valve body, and the air inlet valve body are provided with an air inlet flow channel penetrating from left to right; The pull-off main valve further comprises a sliding valve body slidably connected with the valve core assembly, and a claw for clamping the pull-off valve body; The left end of the sliding valve body is connected with a main valve top pin through a second return spring, the main valve top pin is used for abutting against the air outlet end of the sliding valve body, the sliding valve body is provided with a second sealing surface at the position abutted by the main valve top pin, and when the main valve top pin abuts against the second sealing surface of the sliding valve body, the end of the main valve top pin extends out of the left end of the sliding valve body; The valve core assembly is provided with an air hole extending radially outward; The outer wall of the valve core assembly is provided with a first limiting surface for limiting the transmission valve body; The sliding valve body is provided with a second limiting surface for limiting the valve core assembly, and the air hole is located to the right of the first limiting surface; When the main valve top pin abuts against the second sealing surface of the sliding valve body, the air hole is in communication with the area between the first limiting surface and the second limiting surface.

2. The puller body of claim 1, wherein: The valve flap comprises, in sequence along the axial direction, a blocking part, a sliding part, and a spiral part; The spiral part is provided with an external thread for connecting the pull-off valve body; The outer diameter of the blocking part is smaller than the outer diameter of the sliding part, and the outer diameter of the sliding part is smaller than the outer diameter of the spiral part.

3. The puller body of claim 2, wherein: The top of the blocking part is conical with a gradually changing outer diameter.

4. The puller body of claim 1, wherein: The discharge channel comprises an inverted T-shaped channel and a discharge port; The inverted T-shaped channel comprises a radial flow channel arranged radially outward and an axial flow channel with an axial flow direction; One end of the radial flow channel is connected to the airflow channel, the other end of the radial flow channel is connected to the center of the axial flow channel, and one end of the axial flow channel adjacent to the air pipe is connected to the discharge port; The flow direction of the discharge port is parallel to the flow direction of the axial flow channel.

5. The puller body of claim 2, wherein: An installation hole for installing the valve flap is formed in the pull-off valve body, and the installation hole is in communication with the discharge channel; The installation hole comprises a sliding groove for slidably connecting the sliding part and a threaded hole for threadedly connecting the spiral part; A sealing ring is installed on the inner wall of the sliding groove.

6. The hydroline with bleed channel integrated puller of claim 2, wherein: The spiral part is provided with a prismatic groove.

7. The hydroline with bleed channel integrated puller of claim 1, wherein: The top pin comprises, in sequence from the side adjacent to the air pipe to the side away from the air pipe, a spring supporting part, a flow guiding part, a sealing part, and a sliding part; The return spring is sleeved on the periphery of the spring supporting part; The spring supporting part is a hollow columnar structure; The flow guiding part is provided with a through hole, which leads to the hollow columnar structure and the outer wall of the thimble; The sealing part is used to abut against the inner wall of the pull-apart valve body under the action of the return spring; The sliding part is a cylindrical surface provided with a flow guiding section.

8. The hydroline with bleed channel integrated puller of claim 1, wherein: The connecting valve body is rotatably connected with a rotating part, the rotating part is provided with a cam part, the connecting valve body is provided with a top rod abutting against the sliding valve body, the top rod abuts against the cam part, and the rotating part is provided with a limiting part embedded in the top rod on both sides of the cam part. The claw sheath and the connecting shell are threadedly connected with a screw sleeve, and a first return spring is arranged between the screw sleeve and the sliding valve body.

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