Safety protection device for CNG loading and unloading arm

Abstract

The utility model relates to the technical field of loading and unloading arm protection devices, and discloses a CNG loading and unloading arm safety protection device which comprises an installation bottom plate, a supporting stand column is arranged at the top end of the installation bottom plate, a supporting transverse plate is arranged on the side edge of the top end of the supporting stand column, and a loading and unloading arm is arranged on the supporting transverse plate. The loading and unloading device comprises a loading and unloading arm, the input end of the loading and unloading arm is communicated with an air inlet pipe, the end portion of the air inlet pipe is provided with an air inlet connector, the output end of the loading and unloading arm is communicated with a conveying pipe, and an air conveying backflow prevention assembly is arranged between the loading and unloading arm and the conveying pipe. An anti-backflow inner bin is arranged in an anti-backflow outer bin in the gas transmission anti-backflow assembly, so that the whole natural gas conveying process is safer, the risk that residual gas in a transfer tank flows back can be effectively prevented, the purity of the natural gas stored in a mother station is guaranteed, and use by a user is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to a loading and unloading arm protection device technical field, specifically is a CNG loading and unloading arm safety device. BACKGROUND

[0002] The CNG loading and unloading arm is also called CNG crane arm, and it is an ideal equipment for loading and unloading compressed natural gas in parent stations, sub-stations, gas filling stations and gas unloading stations.

[0003] After searching, the authorized Chinese patent announcement No. CN 221017918 U provides a CNG loading and unloading arm safety device. It relates to the technical field of safety protection. The CNG loading and unloading arm safety device includes a protective platform, a protective shell fixedly installed on the top of the protective platform, a loading and unloading arm arranged in the protective shell, a shuttle opening formed in one side of the protective shell, the shuttle opening being matched with the loading and unloading arm, a box body one fixedly installed at the bottom of the protective platform, a transmission screw one rotatably installed in the box body one, a push plate threadedly installed on the transmission screw one, the push plate extending to the inside of the protective shell at the top, the push plate being movably connected with the protective platform, and a blocking plate fixedly installed on one side of the push plate close to the loading and unloading arm. The CNG loading and unloading arm safety device provided by the utility model has the advantages of forming all-round protection, greatly reducing the entry of dust and impurities into each port of the loading and unloading arm, and improving safety performance.

[0004] The above-mentioned CNG loading and unloading arm still has some deficiencies. In actual use, the existing CNG loading and unloading arm is used for loading and unloading natural gas, but lacks a corresponding anti-airflow backflow mechanism. When the valve is gradually opened, the residual air or other natural gas of different qualities in the tank will enter the parent station through the valve, which will affect the purity of the natural gas stored in the parent station, and there are some defects in use. Utility model content

[0005] In view of the deficiencies of the prior art, the utility model provides a CNG loading and unloading arm safety device, which solves the problem that the existing CNG loading and unloading arm lacks a corresponding anti-airflow backflow mechanism in actual use, and when the valve is gradually opened, the residual air or other natural gas of different qualities in the tank will enter the parent station through the valve, which will affect the purity of the natural gas stored in the parent station, and there are some defects in use.

[0006] The utility model provides following technical scheme: a kind of CNG loading and unloading arm safety protection device, including installation base plate, the top of the installation base plate is provided with support column, the side of the top of support column is provided with support horizontal plate, loading and unloading arm is provided on the support horizontal plate, the input end of the loading and unloading arm is communicated with inlet pipe, the end of the inlet pipe is provided with inlet joint, the output end of the loading and unloading arm is communicated with conveying pipe, gas delivery backflow prevention component is arranged between the loading and unloading arm and the conveying pipe, the end of the conveying pipe is provided with gas delivery joint;

[0007] The gas delivery backflow prevention component includes a backflow prevention outer compartment arranged on the side of the top of the support column, a backflow prevention inner compartment arranged in the backflow prevention outer compartment, an air inlet cavity arranged in the backflow prevention inner compartment, an output end of the loading and unloading arm extending into the air inlet cavity through the backflow prevention outer compartment and the backflow prevention inner compartment, a gas delivery cavity arranged on the side of the air inlet cavity, an end of the conveying pipe extending into the gas delivery cavity through the backflow prevention outer compartment and the backflow prevention inner compartment, the air inlet cavity and the gas delivery cavity being connected through two gas delivery channels arranged therebetween, a closure plug arranged on the side of the air inlet cavity in a sliding manner, an end of the closure plug being inserted into an end of the loading and unloading arm, two limiting insertion grooves being symmetrically formed in the side wall of the air inlet cavity, and a support insertion rod being inserted into the limiting insertion grooves in a sliding manner.

[0008] Preferred technical solution one: an end of the support insertion rod is connected to the side of the closure plug perpendicularly, and a contact spring is sleeved on the support insertion rod.

[0009] Preferred technical solution two: one end of the contact spring is connected to the inner wall of the air inlet cavity, and the other end of the contact spring is in contact with the side wall of the closure plug.

[0010] Preferred technical solution three: the backflow prevention inner compartment is connected to the backflow prevention outer compartment through the fixing connection blocks arranged on the two sides of the backflow prevention inner compartment.

[0011] This solution enables the backflow prevention inner compartment to be arranged in the backflow prevention outer compartment more stably.

[0012] Preferred technical solution four: the side of the inlet pipe is fixedly connected to the support column through the fixing clamps arranged thereon.

[0013] This solution enables the inlet pipe to be fixed on the support column stably.

[0014] Preferred technical solution five: the end of the conveying pipe is connected to the top of the support column through the connecting plate arranged thereon.

[0015] This solution enables the gas delivery backflow prevention component arranged on the conveying pipe to be arranged at the top of the support column stably.

[0016] Compared with the prior art, the CNG loading and unloading arm safety protection device has the following beneficial effects:

[0017] (1) The utility model discloses a gas conveying backflow prevention assembly is arranged between the loading and unloading arm and the conveying pipe, wherein the backflow prevention outer bin in the gas conveying backflow prevention assembly is internally provided with a backflow prevention inner bin, the backflow prevention inner bin is internally provided with a gas inlet cavity and a gas conveying cavity, a closing plug is slidably arranged in the gas inlet cavity, and the side of the closing plug elastically abuts against the abutting spring, so that the end of the closing plug can close the end of the loading and unloading arm, the residual gas in the transfer tank can be effectively prevented from entering the mother station through the loading and unloading arm, the conveying process of the natural gas is more safe, the risk of backflow of the residual gas in the transfer tank can be effectively prevented, the purity of the natural gas stored in the mother station is ensured, and the use of users is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure perspective view of the utility model;

[0019] Figure 2 It is a structure perspective view of the utility model; Figure 1 It is a structure internal view of the gas conveying backflow prevention assembly of the utility model;

[0020] Figure 3 It is a structure perspective view of the utility model; Figure 2 It is an enlarged view of the structure of the limiting slot.

[0021] In the drawing: 1, mounting bottom plate; 2, supporting vertical column; 3, supporting horizontal plate; 4, loading and unloading arm; 5, gas inlet pipe; 6, gas inlet connector; 7, conveying pipe; 8, gas conveying backflow prevention assembly; 9, gas conveying connector;

[0022] 801, backflow prevention outer bin; 802, backflow prevention inner bin; 803, gas inlet cavity; 804, gas conveying cavity; 805, gas conveying channel; 806, closing plug; 807, limiting slot; 808, supporting plug rod; 809, abutting spring; 810, fixed connecting block. DETAILED DESCRIPTION

[0023] Please refer to Figures 1-3 ,

[0024] Embodiment one: a CNG loading and unloading arm safety protection device, comprising a mounting bottom plate 1, the top end of the mounting bottom plate 1 is provided with a supporting vertical column 2, the side of the top end of the supporting vertical column 2 is provided with a supporting horizontal plate 3, the supporting horizontal plate 3 is provided with a loading and unloading arm 4, the input end of the loading and unloading arm 4 is communicated with a gas inlet pipe 5, the end of the gas inlet pipe 5 is provided with a gas inlet connector 6, the output end of the loading and unloading arm 4 is communicated with a conveying pipe 7, the loading and unloading arm 4 and the conveying pipe 7 are provided with a gas conveying backflow prevention assembly 8, and the end of the conveying pipe 7 is provided with a gas conveying connector 9.

[0025] The gas flow prevention backflow assembly 8 comprises a backflow prevention outer bin 801 arranged on the side edge of the top end of the support column 2, a backflow prevention inner bin 802 arranged in the backflow prevention outer bin 801, an air inlet cavity 803 arranged in the backflow prevention inner bin 802, the output end of the loading and unloading arm 4 extending through the backflow prevention outer bin 801 and the backflow prevention inner bin 802 into the air inlet cavity 803, and a gas conveying cavity 804 arranged on the side edge of the air inlet cavity 803, and the end of the conveying pipe 7 extending through the backflow prevention outer bin 801 and the backflow prevention inner bin 802 into the gas conveying cavity 804.

[0026] The air inlet cavity 803 and the gas conveying cavity 804 are connected through two gas conveying channels 805 arranged therebetween, a closing plug 806 is slidingly arranged on the side edge of the air inlet cavity 803, the end of the closing plug 806 is inserted into the end of the loading and unloading arm 4, two limiting insertion grooves 807 are symmetrically arranged on the side wall of the air inlet cavity 803, a support insertion rod 808 is slidingly inserted into the limiting insertion groove 807, the end of the support insertion rod 808 is connected to the side edge of the closing plug 806 perpendicularly, a resisting spring 809 is sleeved on the support insertion rod 808, one end of the resisting spring 809 is connected to the inner wall of the air inlet cavity 803, and the other end of the resisting spring 809 is in contact with the side wall of the closing plug 806.

[0027] In the embodiment, the two sides of the backflow prevention inner bin 802 are connected to the backflow prevention outer bin 801 through the fixed connecting blocks 810 arranged therebetween.

[0028] The backflow prevention inner bin 802 is more stably arranged in the backflow prevention outer bin 801.

[0029] In the embodiment, the side edge of the air inlet pipe 5 is fixedly connected to the support column 2 through the fixed clamps arranged therebetween.

[0030] The air inlet pipe 5 can be stably fixed on the support column 2.

[0031] In the embodiment, the end of the conveying pipe 7 is connected to the top end of the support column 2 through the connecting plate arranged therebetween.

[0032] The gas flow prevention backflow assembly 8 arranged on the conveying pipe 7 can be stably arranged on the top end of the support column 2.

[0033] In the embodiment, the existing CNG loading and unloading arm is used for loading and unloading natural gas in actual use, but lacks a corresponding gas flow backflow prevention mechanism, and when the gas pressure in the tank body is higher than the gas pressure in the mother station, the residual air or other natural gas of different qualities in the tank body will enter the mother station through the valve when the valve is gradually opened, thereby affecting the purity of the natural gas stored in the mother station, and there is a certain defect in use.

[0034] In summary, when the user needs to use the loading and unloading arm 4 to load and unload natural gas, the gas flow prevention assembly 8 is arranged between the loading and unloading arm 4 and the conveying pipe 7. The closing plug 806 in the gas flow prevention assembly 8 can slide in the gas inlet cavity 803, and the side of the closing plug 806 is connected with two supporting rods 808, the end of the supporting rod 808 is slidingly inserted into the limiting slot 807, the supporting rod 808 is sleeved with a resisting spring 809, and the end of the closing plug 806 can be elastically resisted by the resisting spring 809 and inserted into the end of the loading and unloading arm 4. When the natural gas is conveyed through the loading and unloading arm 4, the high-pressure natural gas can push the closing plug 806 resisting the end of the loading and unloading arm 4, so that the natural gas can enter the gas inlet cavity 803. The natural gas in the gas inlet cavity 803 enters the gas conveying cavity 804 through the gas conveying channel 805, and is conveyed into the transfer tank through the conveying pipe 7.

[0035] When the user opens the valve on the loading and unloading arm 4, the residual high-pressure gas in the transfer tank enters the gas conveying cavity 804 through the conveying pipe 7. Since the closing plug 806 resists the opening of the gas conveying channel 805 and the gas inlet cavity 803, the gas in the tank can be blocked, thereby effectively preventing the residual gas in the tank from entering the mother station through the loading and unloading arm 4, making the natural gas conveying process safer, effectively preventing the risk of backflow of residual gas in the transfer tank, ensuring the purity of the natural gas stored in the mother station, and making the use more convenient for the user.

Claims

1. A safety protection device for CNG loading and unloading arm, comprising a mounting base plate (1), characterized in that: The top end of the mounting base plate (1) is provided with a support column (2), the side of the top end of the support column (2) is provided with a support horizontal plate (3), the support horizontal plate (3) is provided with a loading and unloading arm (4), the input end of the loading and unloading arm (4) is communicated with an air inlet pipe (5), the end of the air inlet pipe (5) is provided with an air inlet joint (6), the output end of the loading and unloading arm (4) is communicated with a conveying pipe (7), an air conveying anti-backflow assembly (8) is arranged between the loading and unloading arm (4) and the conveying pipe (7), and the end of the conveying pipe (7) is provided with an air conveying joint (9). The air conveying anti-backflow assembly (8) comprises an anti-backflow outer warehouse (801) arranged at the side of the top end of the support column (2), an anti-backflow inner warehouse (802) arranged in the anti-backflow outer warehouse (801), an air inlet cavity (803) arranged in the anti-backflow inner warehouse (802), wherein the output end of the loading and unloading arm (4) extends through the anti-backflow outer warehouse (801) and the anti-backflow inner warehouse (802) and into the air inlet cavity (803), the side of the air inlet cavity (803) is provided with an air conveying cavity (804), the end of the conveying pipe (7) extends through the anti-backflow outer warehouse (801) and the anti-backflow inner warehouse (802) and into the air conveying cavity (804), the air inlet cavity (803) and the air conveying cavity (804) are communicated through two air conveying channels (805) arranged therebetween, the side of the air inlet cavity (803) is slidably provided with a closing plug head (806), the end of the closing plug head (806) is inserted into the end of the loading and unloading arm (4), and the side wall of the air inlet cavity (803) is symmetrically provided with two limiting insertion grooves (807), and the limiting insertion grooves (807) are slidably provided with a support insertion rod (808).

2. The safety protection device for CNG loading and unloading arm according to claim 1, characterized in that: The end of the support insertion rod (808) is connected with the side of the closing plug head (806) perpendicularly, and a resisting spring (809) is arranged on the support insertion rod (808).

3. The safety protection device for CNG loading and unloading arm according to claim 2, characterized in that: One end of the resisting spring (809) is connected with the inner wall of the air inlet cavity (803), and the other end of the resisting spring (809) abuts against the side wall of the closing plug head (806).

4. The safety protection device for CNG loading and unloading arm according to claim 3, characterized in that: The two sides of the anti-backflow inner warehouse (802) are connected with the anti-backflow outer warehouse (801) through the fixing connecting blocks (810).

5. A safety protection device for a CNG loading and unloading arm according to claim 4, characterized in that: The side of the air inlet pipe (5) is fixedly connected with the support column (2) through the fixing clamps.

6. A safety protection device for a CNG loading and unloading arm according to claim 5, characterized in that: The end of the conveying pipe (7) is connected with the top end of the support column (2) through the connecting plate.

Images