Dry type joint for liquefied hydrocarbon

Abstract

The liquefied hydrocarbon dry type connector comprises a connector body, a valve element assembly for achieving self-sealing of the connector body, a driving assembly for switching the opening and closing states of the valve element assembly and a clamping jaw for fixing a male head. The valve element assembly comprises a valve element installed in the connector body in a sliding mode, a valve element base matched with the valve element in an abutting mode to seal the connector pipeline and an elastic piece providing abutting sealing force for the valve element. The driving assembly controls the valve element to slide in the connector to achieve sealing. And bolts are arranged on the clamping jaws for self-locking, and the bolts can limit the movement of the clamping jaws, so that prevention is achieved. Before the connector and the male head are disconnected, the bolt is pulled to move towards one side far away from the clamping jaw, the locking mechanism is released, and the connector and the male head are disconnected. The limiting piece does not limit rotation of the handle any more so as to relieve limitation of the pressing rod on the valve element, the valve element abuts against the valve element base under the acting force of the elastic piece, the interior of the pipeline is sealed, and the self-sealing effect is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe joints, in particular to a liquefied hydrocarbon dry joint. BACKGROUND

[0002] The liquefied hydrocarbon dry joint is used for pipeline transportation of liquefied hydrocarbon medium, and is mainly used for connection between a pipeline and a tank car in a loading and unloading area of a tank farm. In order to prevent leakage caused by medium overflowing from inside and outside the pipeline after the pipeline and the tank car are disconnected, the liquefied hydrocarbon dry joint applied to the loading and unloading station of the tank farm should meet the requirement of 6.1.9 in the Safety Management Specification for Liquefied Hydrocarbon Tank Farm of Chemical Enterprises AQ3059-2023, and should have the functions of locking, anti-falling and falling self-sealing.

[0003] In the related art, the existing liquefied hydrocarbon dry joint adopts a KJB type quick joint on the market. After this type of joint is disconnected from a male joint, it does not have a self-sealing function, which causes part of the residual medium in the disconnected pipeline to flow out of the joint connection port and volatilize into the air, and does not meet the requirement of VOCS emission GB31571-2015. Therefore, there is an urgent need to design a liquefied hydrocarbon dry joint with a self-sealing function. SUMMARY

[0004] In order to solve the problem that the existing liquefied hydrocarbon dry joint does not have a self-sealing function, causing residual medium to flow out of the joint connection port and volatilize into the air, the present application provides a liquefied hydrocarbon dry joint with a self-sealing function.

[0005] The liquefied hydrocarbon dry joint provided by the present application adopts the following technical solution:

[0006] A liquefied hydrocarbon dry joint, comprising a joint body, a valve core assembly and a driving assembly are arranged inside the joint body; the valve core assembly comprises a valve core slidingly installed in the joint body and an elastic member providing sealing abutting force for the valve core, and a valve core seat for abutting and sealing the valve core is arranged on the inner side wall of the joint body; the driving assembly comprises an abutting portion, a rotating shaft, a pressing rod, a limiting member and a handle, the abutting portion is fixed on the valve core, the rotating shaft is rotatably installed on the joint body and penetrates into the joint body, and the rotating shaft is located on one side of the central axis of the joint body; the pressing rod is fixedly installed at one end of the rotating shaft located in the joint body, and the other end of the pressing rod away from the rotating shaft abuts against the abutting portion for driving the abutting portion and the valve core to compress the elastic member and open the valve; the handle is fixedly installed at one end of the rotating shaft located outside the joint body; and the limiting member is installed on the joint body for limiting rotation of the handle to prevent the valve from being mistakenly opened or closed.

[0007] By adopting the technical scheme, when the valve is closed, the valve core is abutted against the valve core seat by the elastic member force, and the pipeline inside the sealing joint body is sealed; when the valve is opened, the handle is rotated to drive the pressing rod to rotate, the pressing rod pushes the abutting portion and the valve core, and the elastic member is further compressed; after the valve is opened, the elastic member exerts force on the valve core to push the valve core, the limiting member blocks the handle to limit the rotation of the handle and thus limit the movement of the abutting portion, so that the valve is kept in the open state; if the valve needs to be closed, the limiting member no longer blocks the rotation of the handle, thereby releasing the limitation on the valve core, the valve core is abutted against the valve core seat by the elastic member force, and the valve is closed.

[0008] Preferably, the abutting portion is a rod body parallel to the rotating shaft, and a roller is coaxially and rotatably installed on the abutting portion.

[0009] By adopting the technical scheme, the roller replaces the abutting portion to abut against the pressing rod, and rolling friction is used to replace sliding friction, so that the valve is more easily and labor-savingly opened and closed.

[0010] Preferably, the pressing rod is an arc-shaped hook-shaped rod body, and an end of the pressing rod away from the rotating shaft is hooked on the roller.

[0011] By adopting the technical scheme, the pressing rod is designed as an arc-shaped hook-shaped rod body, thereby reducing the range covered by the rotation of the pressing rod, and thus reducing the space occupied by the rod body and making the structure more compact.

[0012] Preferably, an end of the handle close to the rotating shaft is provided with a waist-shaped hole, the waist-shaped hole is arranged along the length direction of the handle, the rotating shaft passes through the middle part of the waist-shaped hole, an end of the handle close to the rotating shaft is provided with a rotating connection shaft penetrating the handle and the rotating shaft, and the axis of the rotating connection shaft is perpendicular to the axis of the rotating shaft; when the handle is upturned around the rotating connection shaft, the handle is higher than the limiting member and is not blocked; when the handle is placed horizontally, the limiting member is located on the movement track of the handle to block the handle.

[0013] By adopting the technical scheme, when the handle is upturned, the handle is rotated upward around the rotating connection shaft, and since the rotating shaft passes through the middle part of the waist-shaped hole, enough space is left between the handle and the rotating shaft for the up-and-down movement of the handle; the upturned handle makes the height of the handle higher than the limiting member, so that the handle goes over the limiting member, and then the handle is placed horizontally, the handle is blocked by the limiting member and cannot be restored to the original state, thereby keeping the valve in the open state.

[0014] Preferably, a reset spring is sleeved on an end of the rotating shaft outside the joint body, one end of the reset spring abuts against the joint body, and an end of the reset spring away from the joint body abuts against the handle.

[0015] By adopting the technical scheme, under the action of no external force, the reset spring pushes the handle, so that the handle is in a flat state; when the handle is turned up, the reset spring applies a restoring force to the handle to restore the handle to the flat state.

[0016] Preferably, the valve core is provided with a connecting male head claw on the side wall of the joint body away from the elastic member.

[0017] By adopting the technical scheme, the joint body and the male head are connected by the claw, the male head is located at the end of the valve core away from the elastic member, and the medium pressure in the pipeline connected by the joint body is converted into the abutting force of the valve core against the valve core seat, thereby ensuring the reliability of the seal.

[0018] Preferably, the end of the valve core close to the valve core seat is in a circular truncated cone shape, and the valve core seat is provided with a contour corresponding to the shape of the valve core.

[0019] By adopting the technical scheme, the circular truncated cone structure facilitates the abutting of the valve core and the valve core seat, ensures the sealing of the joint, and enables the valve core to slide freely without excessive resistance between the valve core and the valve core seat.

[0020] Preferably, a sealing ring is provided on the valve core.

[0021] By adopting the technical scheme, the sealing ring further enhances the sealing between the valve core and the valve core seat.

[0022] Preferably, a support bracket for supporting the elastic member is fixed in the joint body, a through hole is provided on the support bracket for the medium in the pipeline to pass through, a guide sleeve is provided on the end of the support bracket close to the elastic member, a guide rod is slidably inserted into the guide sleeve, the guide rod is fixed to the side of the valve core away from the valve core seat, the elastic member is a spring, the elastic member is sleeved on the guide sleeve, one end of the elastic member abuts against the side of the valve core away from the valve core seat, and the other end of the elastic member abuts against the support bracket.

[0023] By adopting the technical scheme, the through hole provided on the support bracket enables the medium in the pipeline to pass through the joint; the support bracket can support the elastic member, so that the elastic member can be compressed to provide an abutting force to the valve core, so that the valve core abuts against the valve core seat; the elastic member is a spring, which is easy to purchase and saves cost; when the valve is opened, the valve core slides to compress the spring, the guide rod and the guide sleeve cooperate to compress the spring along the axial direction, and the spring is prevented from deviating.

[0024] Preferably, the joint body comprises a first joint and a second joint, the first joint is detachably installed on the second joint, the valve core seat and the rotating shaft are installed on the first joint, the support bracket is installed on the second joint, and the through hole profile of the end of the first joint close to the second joint is larger than the profile of the valve core.

[0025] By adopting the technical scheme, the first joint and the second joint are detachably installed, so as to facilitate installation of the valve core, the valve core seat, the support, the abutting portion, the pressing rod and the rotating shaft; meanwhile, the joint is facilitated in maintenance and replacement of internal parts.

[0026] To sum up, the present application has at least one of the following beneficial technical effects:

[0027] 1. The elastic member arranged on the joint body provides abutting force for the valve core, so that the valve core abuts against the valve core seat under no action of other external force to automatically close the valve, to realize self-sealing function and prevent medium leakage; the abutting portion, the rotating shaft, the limiting member, the pressing rod and the handle are arranged, so that the valve core sliding is controlled by rotating the handle to control opening and closing of the valve;

[0028] 2. The waist-shaped hole on the handle and the rotating connecting shaft for rotatingly installing the handle are arranged, so that the handle can be flipped up and down; the handle is flipped up to make the handle pass the limiting member and adjust the opening and closing state of the valve core; the handle is placed flat to make the handle be blocked by the limiting member, so that the valve core is stably kept in the closed or opened state; the reset spring arranged between the handle and the joint body is arranged to top the handle to make the handle be placed flat under no action of external force, to prevent the valve from being opened or closed by mistake;

[0029] 3. The roller arranged on the abutting portion replaces the abutting portion and the pressing rod to abut against each other, so that rolling friction is used to replace sliding friction, to make it more comfortable and labor-saving to open and close the valve;

[0030] 4. The joint body is composed of the detachable first joint and the second joint, so that installation of internal parts of the joint is facilitated, and the joint is facilitated in maintenance and replacement of internal parts. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0032] Figure 2 is a side view of the embodiment of the present application;

[0033] Figure 3 is a sectional view of A-A in Figure 2 is a sectional view of A-A in

[0034] Figure 4 is a sectional view of A-A in Figure 3 is a schematic diagram of the structure of the valve in the opened state from the perspective;

[0035] Figure 5 is a sectional view of B-B in Figure 2

[0036] is a sectional view of B-B in Figure 6 Figure 1 is an enlarged schematic diagram of the C region in

[0037] ​Label: 1, joint body; 11, first joint; 111, mounting plate; 112, limiting hook; 113, connecting shaft; 12, second joint; 2, bracket; 3, valve core assembly; 31, valve core seat; 32, valve core; 33, elastic piece; 34, guide sleeve; 35, guide rod; 41, abutting portion; 411, roller; 42, rotating shaft; 43, pressing rod; 44, handle; 441, waist-shaped hole; 45, rotating connecting shaft; 46, return spring; 47, limiting piece; 5, clamping jaw; 51, wrench; 52, bolt; 53, clamping column; 54, abutting spring; 55, handle; 56, sliding hole; 57, spring groove; 58, avoiding groove. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 6 The application is further described in detail.

[0039] The application discloses a liquefied hydrocarbon dry joint.

[0040] Reference Figure 1 and Figure 2 A liquefied hydrocarbon dry joint comprises a joint body 1, a valve core assembly 3 mounted in the joint body 1, a driving assembly for controlling the opening and closing of the valve core assembly 3, and a clamping jaw 5 connected with a male head on the side wall of the joint body 1.

[0041] Reference Figure 3 The joint body 1 is composed of a first joint 11 and a second joint 12, one end of the first joint 11 is screwed and mounted on the second joint 12 through a threaded connection structure, and a sealing ring is arranged between the first joint 11 and the second joint 12 for sealing.

[0042] The valve core assembly 3 comprises a valve core 32, a valve core seat 31, a guide sleeve 34, a guide rod 35 and an elastic member 33. The valve core seat 31 is integrally formed on the inner side wall of the first joint 11 away from the second joint 12; the valve core 32 is designed as a circular truncated cone and is coaxially arranged with the pipeline in the joint body 1; the valve core seat 31 is correspondingly arranged in the shape of the valve core 32 and the valve core 32 is located on the side of the valve core seat 31 close to the second joint 12, the valve core 32 is in abutment sealing with the valve core seat 31, and a sealing ring is installed on the abutment surface of the valve core 32 and the valve core seat 31; the guide rod 35 is fixed at the end of the valve core 32 away from the valve core seat 31 through a threaded rotating structure, and the guide rod 35 is coaxially arranged with the valve core 32; a disc-shaped bracket 2 is fixed in the second joint 12 through a threaded rotating structure, a through hole is formed in the bracket 2 for the pipeline medium to pass through, and a cylindrical sleeve structure is coaxially and integrally arranged on the side of the bracket 2 close to the first joint 11, and the center hole of the cylindrical sleeve structure penetrates through the entire bracket 2; the guide sleeve 34 is inserted and installed in the cylindrical sleeve of the bracket 2, one end of the guide sleeve 34 is in abutment with the inner protrusion of the cylindrical sleeve, the other end of the guide sleeve 34 is limited by the snap spring installed on the inner wall of the cylindrical sleeve, and the inner diameter of the guide sleeve 34 is smaller than the inner diameter of the cylindrical sleeve of the bracket 2; the guide rod 35 is slidingly inserted in the guide sleeve 34; the elastic member 33 is arranged along the central axis of the joint body 1, the elastic member 33 is a spring and is sleeved on the guide rod 35 and the aid sleeve of the bracket 2, one end of the elastic member 33 is in abutment with the side of the valve core 32 away from the valve core seat 31, and the other end of the elastic member 33 is in abutment with the bracket 2, the elastic member 33 provides abutment force for the valve core 32 to abut against the valve core seat 31.

[0043] With reference to Figure 1 and Figure 3 , the driving assembly comprises an abutting part 41, a rotating shaft 42, a pressing rod 43, a handle 44, a rotating connecting shaft 45, a reset spring 46 and a limiting member 47. The rotating shaft 42 is rotatably installed in the first joint 11 and penetrates into the first joint 11, the rotating shaft 42 is arranged on one side of the guide rod 35, and the axis of the rotating shaft 42 is perpendicular to the axis of the guide rod 35; the handle 44 is installed at the end of the rotating shaft 42 located outside the first joint 11, and the pressing rod 43 is coaxially inserted and fixed at the end of the rotating shaft 42 located inside the first joint 11; the abutting part 41 is a cylindrical rod parallel to the rotating shaft 42, the abutting part 41 is inserted and fixed at the end of the valve core 32 close to the spring, and a roller 411 is rotatably sleeved on the abutting part 41; the pressing rod 43 is an arc-shaped hook-shaped rod body, and the end of the pressing rod 43 away from the rotating shaft 42 hooks the roller 411 and abuts against the roller 411.

[0044] The handle 44 is provided with a waist-shaped hole 441 at one end, the rotating shaft 42 penetrates the waist-shaped hole 441 on the handle 44, and the end of the rotating shaft 42 close to the handle 44 is located in the middle of the waist-shaped hole 441; the end of the handle 44 close to the rotating shaft 42 is provided with a rotating connecting shaft 45, the axis of the rotating connecting shaft 45 is perpendicular to the axis of the rotating shaft 42, and the rotating connecting shaft 45 penetrates the handle 44 and the rotating shaft 42 to hingedly fix the handle 44 on the rotating shaft 42. Due to the design of the waist-shaped hole 441, a space is formed between the handle 44 and the rotating shaft 42 for the handle 44 to be flipped up and down, and the handle 44 is flipped up and down around the rotating connecting shaft 45.

[0045] The reset spring 46 is sleeved on the end of the rotating shaft 42 close to the handle 44; one end of the reset spring 46 abuts against the handle 44, and the other end of the reset spring 46 abuts against the first connector 11. When the handle 44 is not subjected to external force, the reset spring 46 pushes the handle 44 to be placed flat.

[0046] The limiting piece 47 is a cylindrical rod body, the limiting piece 47 is inserted and fixed on the outer side wall of the first connector 11 and has an axis parallel to the rotating shaft 42, and the limiting piece 47 is located on the rotating track of the handle 44; when the handle 44 is placed flat, the maximum height of the limiting piece 47 is higher than the height of the handle 44, and the limiting piece 47 limits the rotation of the handle 44; when the handle 44 is flipped up, the maximum height of the limiting piece 47 is lower than the height of the handle 44, and the handle 44 can be rotated smoothly.

[0047] When the valve is opened, the handle 44 is flipped up and rotated around the rotating shaft 42 to pass the limiting piece 47, the pressing rod 43 is rotated to press and abut against the valve core 32 to open the valve, then the reset spring 46 makes the handle 44 quickly return to the flat state, the limiting piece 47 blocks the handle 44 to limit the rotation of the handle 44, and the valve is kept in the open state; when it is needed to close the valve, the handle 44 is flipped up, the handle 44 is rotated to pass the limiting piece 47, the valve core 32 is automatically reset to abut against the valve core seat 31 under the action of the elastic piece 33 to seal, then the reset spring 46 makes the handle 44 automatically placed flat, the limiting piece blocks the rotation of the handle 44, and the erroneous opening of the pipeline in the connector is prevented.

[0048] Reference Figure 5 The side wall of the end of the first connector 11 away from the second connector 12 is integrally provided with mounting plates 111, the mounting plates 111 are two by two in a group and parallel to each other; the claws 5 are located between the two mounting plates 111 in the same group, a connecting shaft 113 penetrates the two mounting plates 111 and the claws 5, the connecting shaft 113 is inserted and fixed with the mounting plates 111, and the connecting shaft 113 is rotationally matched with the claws 5; the connecting position of the claws 5 and the connecting shaft 113 is a cam disc structure, a through groove is provided on the side wall of the first connector 11 to avoid the claws 5, with the rotation of the claws 5 around the connecting shaft 113, the end of the claws 5 can be deeply inserted into the first connector 11 to form a clamping protruding structure matched with the male head; the end of the claws 5 away from the first connector 11 is provided with a wrench 51, and the claws 5 and the wrench 51 are integrally formed.

[0049] When the wrench 51 is close to the first joint 11, the pawl 5 forms a protruding structure inside the first joint 11, which can be clamped with the groove on the outer wall of the male head, so that the joint body 1 and the male head are stably connected; when the wrench 51 is away from the first joint 11, the pawl 5 rotates to make the protruding structure no longer inside the first joint 11, facilitating the insertion and disengagement of the male head; in this embodiment, the pawl 5 is provided with two and is centrally symmetrical about the axis of the joint body 1, and the circumferential position of the pawl 5 is designed to avoid the installation part of the rotating shaft 42 and the handle 44 and other external structures, so as to avoid structural interference.

[0050] Reference Figure 5 and Figure 6 , the side of the wrench 51 close to the first joint 11 is provided with a sliding hole 56 along the length direction of the wrench 51, and a latch 52 is slidingly installed in the sliding hole 56; the latch 52 is sleeved with an abutting spring 54, and the side wall of the wrench 51 close to the first joint 11 is provided with a spring groove 57 for placing and accommodating the abutting spring 54; the end of the latch 52 close to the mounting plate 111 is fixedly connected with a clamping column 53, the clamping column 53 is perpendicular to the latch 52, the clamping column 53 is parallel to the connecting shaft 113, the both ends of the abutting spring 54 abut against the groove wall of the spring groove 57 and the clamping column 53 respectively, the side wall of the spring groove 57 is provided with an avoiding groove 58 corresponding to the clamping column 53, and the avoiding groove 58 is a waist-shaped groove arranged along the length direction of the latch 52; the end of the latch 52 away from the clamping column 53 is provided with a circular handle 55.

[0051] The mounting plate 111 is integrally provided with a limiting hook 112 away from the first joint 11, when the pawl 5 abuts against the first joint 11, i.e. in the state of locking the male head, the clamping column 53 is located on the side of the limiting hook 112 close to the first joint 11 and the limiting hook 112 abuts against the clamping column 53, the limiting hook 112 is used to limit the movement of the clamping column 53, thereby limiting the rotation of the wrench 51, preventing the pawl 5 from being opened. When it is necessary to disconnect the joint, the handle 55 is pulled to drive the latch 52 to move away from the limiting hook 112, and the clamping column 53 is out of the blocking range of the limiting hook 112, at this time, the wrench 51 can be rotated to drive the pawl 5 to rotate; when the wrench 51 abuts against the first joint 11, the abutting spring 54 pushes the clamping column 53 to move to the side of the limiting hook 112, and the clamping column 53 is automatically reset to form clamping, preventing the pawl 5 from being opened by mistake.

[0052] The implementation principle of the embodiment of the application is that: when the joint is used, the male head is inserted into the joint, and the pawl 5 fixes the joint and the male head; the handle 44 is turned up and rotated, the handle 44 drives the pressing rod 43 to move to push the abutting part 41, the valve core 32 is slid to open the valve; after the handle 44 passes the limiting part 47, the handle 44 is placed horizontally, at this time, the handle 44 is blocked by the limiting part 47, and the handle 44 cannot be restored, and the valve remains open.

[0053] Before the joint and the male head are disconnected, the upward turning handle 44 makes the handle 44 pass the limiting member 47, and the handle 44 is no longer blocked by the limiting member 47; the elastic member 33 applies a pressing force to the valve core 32, so that the valve core 32 is pressed against the valve core seat 31, the valve is closed, the pipeline inside the sealing joint body 1 is sealed, the internal medium of the pipeline is prevented from leaking, and the self-sealing function is realized.

[0054] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A dry connection for liquefied hydrocarbons comprising a connection body (1), characterized in that, The utility model also includes a valve core assembly (3) arranged in the joint body (1) and a driving assembly for driving the valve core assembly (3) to open and close; the valve core assembly (3) includes a valve core (32) slidingly arranged in the joint body (1) and an elastic member (33) for providing sealing abutting force for the valve core (32), and an inner side wall of the joint body (1) is provided with a valve core seat (31) for abutting and sealing with the valve core (32); the driving assembly includes an abutting part (41), a rotating shaft (42), a pressing rod (43), a limiting member (47) and a handle (44); the abutting part (41) is fixed on the valve core (32), the rotating shaft (42) is rotatably arranged on the joint body (1) and penetrates into the joint body (1), and the rotating shaft (42) is located on one side of the central axis of the joint body (1); the pressing rod (43) is fixedly arranged on one end of the rotating shaft (42) located in the joint body (1), and one end of the pressing rod (43) away from the rotating shaft (42) abuts against the abutting part (41) for driving the abutting part (41) and the valve core (32) to compress the elastic member (33) and open the valve; one end of the rotating shaft (42) outside the joint body (1) is fixedly provided with the handle (44); and the limiting member (47) is arranged on the joint body (1) for limiting the rotation of the handle (44).

2. A dry hydrocarbon liquefied gas connection according to claim 1, characterized in that The abutting part (41) is a rod body parallel to the rotating shaft (42), and a roller (411) is coaxially rotatably arranged on the abutting part (41), and the roller (411) is interposed between the pressing rod (43) and the abutting part (41) to replace the abutting part (41) abutting against the pressing rod (43).

3. A dry hydrocarbon liquefied gas connection according to claim 2, characterized in that The pressing rod (43) is an arc-shaped hook-shaped rod body, and one end of the pressing rod (43) away from the rotating shaft (42) is hooked on the roller (411).

4. A dry hydrocarbon liquefied gas connection according to claim 1, characterized in that One end of the handle (44) close to the rotating shaft (42) is provided with a waist-shaped hole (441) arranged along the length direction of the handle (44); the rotating shaft (42) penetrates through the middle part of the waist-shaped hole (441); one end of the handle (44) close to the rotating shaft (42) is provided with a rotating connection shaft (45) penetrating through the handle (44) and the rotating shaft (42), and the axis of the rotating connection shaft (45) is perpendicular to the axis of the rotating shaft (42); when the handle (44) is turned up around the rotating connection shaft (45), the handle (44) is higher than the height of the limiting member (47) and is not blocked; when the handle (44) is placed horizontally, the limiting member (47) is located on the movement track of the handle (44) to block the handle (44).

5. A dry hydrocarbon liquefied gas connection according to claim 4, characterized in that One end of the rotating shaft (42) outside the joint body (1) is sleeved with a reset spring (46), one end of the reset spring (46) abuts against the joint body (1), and the other end of the reset spring (46) away from the joint body (1) abuts against the handle (44).

6. A dry hydrocarbon liquefied gas connection according to claim 1, characterized in that One end of the valve core (32) away from the elastic member (33) is provided with a connecting male head claw (5) on the circumferential side wall of the joint body (1).

7. A dry hydrocarbon liquefied gas connection according to claim 1, characterized in that One end of the valve core (32) close to the valve core seat (31) is in the shape of a circular truncated cone, and the valve core seat (31) is correspondingly arranged in the shape of the valve core (32).

8. A dry hydrocarbon liquefied gas connection according to claim 7, characterized in that A sealing ring is arranged on the valve core (32).

9. A dry hydrocarbon liquefied gas connection according to claim 7, characterized in that The support bracket (2) of the support elastic member (33) is fixed in the joint body (1), a through hole is arranged on the support bracket (2) for the medium in the pipeline to pass through; a guide sleeve (34) is arranged on one end of the support bracket (2) close to the elastic member (33), a guide rod (35) is slidably inserted in the guide sleeve (34), the guide rod (35) is fixed on the side of the valve core (32) away from the valve core seat (31); the elastic member (33) is a spring, the elastic member (33) is sleeved on the guide sleeve (34); one end of the elastic member (33) abuts against the side of the valve core (32) away from the valve core seat (31), and the end of the elastic member (33) away from the valve core (32) abuts against the support bracket (2).

10. A dry hydrocarbon liquefied gas connection according to claim 9, characterized in that The joint body (1) comprises a first joint (11) and a second joint (12), the first joint (11) is detachably installed on the second joint (12); the valve core seat (31) and the rotating shaft (42) are installed on the first joint (11), the support bracket (2) is installed on the second joint (12), and the end hole contour of the first joint (11) close to the second joint (12) is larger than the contour of the valve core (32).

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