Gas reflux device for propane filling

Abstract

The utility model relates to the technical field of reflux devices, and discloses a gas reflux device for propane filling, which comprises a propane steel cylinder, one side of the propane steel cylinder is fixedly communicated with a gas inlet pipe, and the front side of the propane steel cylinder is fixedly communicated with an exhaust pipe. An air pressure monitor for detecting the internal air pressure of the propane steel cylinder is mounted on the propane steel cylinder; the first return pipe is fixedly communicated with the other side of the propane steel cylinder; the filter box is fixedly installed on the outer side of the propane steel cylinder, the top of the filter box is fixedly communicated with one end of the first backflow pipe, and the filter box is designed to be of an open structure. According to the gas backflow device for propane filling, when propane gas passes through the filter box, a filter screen can filter the gas, impurities such as solid particles, oil stains and dust in the gas are effectively removed, and the gas backflow effect is improved; the filtering function ensures that the gas flowing back to the return tank is kept highly pure, so that the internal cleanness of the equipment is maintained, and abrasion and pollution caused by impurities are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a backflow device technical field, specifically is a kind of propane filling gas backflow device. BACKGROUND

[0002] Propane is widely used in domestic heating, cooking and industrial production as a common liquefied petroleum gas, and a gas backflow device is usually used to ensure the safety and efficiency of the filling process during propane filling.

[0003] The existing gas backflow device cannot clean the impurities in the gas, which may affect the internal cleanliness of the filling equipment and filter box. UTILITY MODEL CONTENT

[0004] To overcome the shortcomings of the prior art, the utility model provides a gas backflow device for propane filling, which solves the problem that the existing gas backflow device cannot clean the impurities in the gas, which may affect the internal cleanliness of the filling equipment and filter box.

[0005] To achieve the above purpose, the utility model is implemented by the following technical solutions: a gas backflow device for propane filling, comprising a propane cylinder, a gas inlet pipe fixedly connected to one side of the propane cylinder, an exhaust pipe fixedly connected to the front side of the propane cylinder, and a gas pressure monitor installed on the propane cylinder to detect the internal gas pressure.

[0006] A first backflow pipe is fixedly connected to the other side of the propane cylinder.

[0007] A filter box is fixedly installed on the outside of the propane cylinder, and the top of the filter box is fixedly connected to one end of the first backflow pipe.

[0008] A second backflow pipe is fixedly connected to the bottom of the filter box, and the other end is connected to a backflow tank.

[0009] A cover plate is provided at the opening of the filter box.

[0010] Two groups of filter screens are provided inside the filter box to filter the backflow gas.

[0011] An electromagnetic control valve is installed on the first backflow pipe.

[0012] Preferably, a plurality of elastic buckles are installed between the filter box and the cover plate.

[0013] Preferably, the filter box is provided with a frame near the position of the filter screen, the filter screen is fixed to the inner side wall of the frame, the inner side wall of the filter box is fixed with a horizontally arranged beam plate near the position of the frame, the beam plate is fixedly connected with the filter box, one end of the lower surface of the frame is fixed with a symmetrically arranged buckle, and the lower surface of the beam plate is provided with a clamping groove matched with the buckle.

[0014] Preferably, the outer frame surface of the frame is fixed with a first rubber pad, one side of the cover plate is fixed with a second rubber pad, one side of the first rubber pad extends to the outside of the filter box, and the remaining side surfaces are tightly fitted with the side walls of the filter box.

[0015] Preferably, the front and rear sides of the cover plate are both fixed with symmetrically arranged positioning lock pins, and the side surface of the filter box is fixed with a socket for limiting insertion of the positioning lock pins.

[0016] Preferably, the other side of the cover plate is fixed with a handle.

[0017] Beneficial effects

[0018] The propane filling gas reflux device has the following beneficial effects compared with the prior art:

[0019] The propane filling gas reflux device, when propane gas passes through the filter box, the filter screen filters the gas, effectively removing solid particles, oil stains, dust and other impurities in the gas, and this filtering function ensures that the gas refluxing to the reflux tank remains highly pure, thereby maintaining the internal cleanliness of the equipment and avoiding wear and pollution caused by impurities. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Fig. 2 It is a schematic diagram of the structure of the filter box and the cover plate disassembly;

[0022] Fig. 3 It is a structure disassembly diagram of the filter screen and the frame and the like connecting pieces.

[0023] In the drawings: 101, propane cylinder; 102, gas inlet pipe; 103, gas outlet pipe; 104, first reflux pipe; 105, filter box; 106, cover plate; 107, second reflux pipe; 108, electromagnetic control valve; 109, filter screen; 110, frame; 111, first rubber pad; 112, beam plate; 113, buckle; 114, second rubber pad; 115, positioning lock pin; 116, socket; 117, elastic buckle; 118, handle; 119, gas pressure monitor. DETAILED DESCRIPTION

[0024] Clearly, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present utility model.

[0025] As shown in the drawings: Figs. 1-3

[0026] A gas backflow device for propane filling, comprising a propane cylinder 101, a gas inlet pipe 102 fixedly communicated with one side of the propane cylinder 101, an exhaust pipe 103 fixedly communicated with the front side of the propane cylinder 101, and a gas pressure monitor 119 installed on the propane cylinder 101 for detecting the internal gas pressure thereof;

[0027] A first backflow pipe 104 fixedly communicated with the other side of the propane cylinder 101;

[0028] A filter box 105 fixedly installed on the outer side of the propane cylinder 101, with the top of the filter box 105 fixedly communicated with one end of the first backflow pipe 104, and the filter box 105 designed in an open structure;

[0029] A second backflow pipe 107 fixedly communicated with the bottom of the filter box 105 and connected with a backflow tank at the other end;

[0030] A cover plate 106 arranged at the opening of the filter box 105, with a handle 118 fixedly arranged on the other side of the cover plate 106;

[0031] Two groups of filter screens 109 arranged inside the filter box 105 for filtering the backflow gas, a frame 110 arranged inside the filter box 105 close to the filter screens 109, the filter screens 109 fixedly arranged on the inner side wall of the frame 110, a horizontally arranged beam plate 112 fixedly arranged on the inner side wall of the filter box 105 close to the frame 110, the beam plate 112 fixedly connected with the filter box 105, a plurality of symmetrically arranged buckling blocks 113 fixedly arranged on the lower surface of the frame 110, and a plurality of symmetrically arranged clamping grooves arranged on the lower surface of the beam plate 112 corresponding to the buckling blocks 113;

[0032] An electromagnetic control valve 108 installed on the first backflow pipe 104;

[0033] A plurality of elastic buckles 117 installed between the filter box 105 and the cover plate 106, the elastic buckles 117 composed of elastic female buckles and male buckles, the elastic female buckles fixedly arranged on the side surface of the filter box 105, and the male buckles fixedly arranged on the edge surface of the cover plate 106 corresponding to the elastic female buckles.

[0034] ​In this embodiment: the propane filling gas reflux device, in use, during use, propane is filled into the propane cylinder 101 through the gas inlet pipe 102, as the propane in the propane cylinder 101 increases, the internal pressure will also rise, the gas pressure monitor 119 is used to monitor the pressure inside the propane cylinder 101 in real time, when the pressure in the cylinder approaches the pressure in the reflux tank (not shown in the figure), the control unit will automatically open the electromagnetic control valve 108 on the first reflux pipe 104, at this time, part of the propane gas in the propane cylinder 101 will flow to the reflux tank through the first reflux pipe 104, the filter box 105 and the second reflux pipe 107, thereby realizing the gas reflux operation;

[0035] When the propane gas passes through the filter box 105, the filter screen 109 filters the gas, effectively removing solid particles, oil stains, dust and other impurities in the gas, this filtering function ensures that the gas refluxed to the reflux tank remains highly pure, thereby maintaining the internal cleanliness of the equipment and avoiding wear and pollution caused by impurities;

[0036] After long-term use, when it is necessary to clean or replace the impurities on the filter screen 109, the operator can conveniently take and place the cover plate 106 by holding the handle 118;

[0037] The elastic buckle 117 is composed of an elastic female buckle and a male buckle, the elastic female buckle is fixed on the side of the filter box 105, and the male buckle is fixed on the edge of the cover plate 106 at a position corresponding to the elastic female buckle; by buckling the elastic female buckle on the male buckle, the connection and locking of the filter box 105 and the cover plate 106 are realized, and the open end of the filter box 105 is blocked; reversing the operation can easily unlock and facilitate disassembly;

[0038] The frame 110 carries the filter screen 109 and is placed on the cross beam plate 112, and the buckle block 113 is inserted into the clamping groove provided on the cross beam plate 112, so that the frame 110 and the filter screen 109 are limited in the upward and downward directions, thereby ensuring the stability of the placement of the frame 110 and the filter screen 109 and other components;

[0039] The frame 110 can be removed, and the filter screen 109 can be carried out, thereby facilitating the replacement of the filter screen 109 and ensuring the filtering effect.

[0040] It should be noted that the exhaust pipe 103 is used to discharge the gas inside the propane cylinder 101, and a control valve is installed on the exhaust pipe 103, which can block the exhaust pipe 103, and the gas inlet pipe 102 on one side of the propane cylinder 101 can be connected to the reflux tank.

[0041] It should be noted that the power equipment involved in the product is powered by an external power source, and the contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0042] Furthermore;

[0043] In an optional embodiment, a first rubber pad 111 is fixed to the outer frame surface of the frame 110, and a second rubber pad 114 is fixed to one side of the cover plate 106. One side of the first rubber pad 111 extends to the outside of the filter box 105, and the other side is tightly fitted to the side wall of the filter box 105.

[0044] In this embodiment: a second rubber pad 114 is installed on one side of the cover plate 106. When the elastic buckle 117 connects and locks the filter box 105 and the cover plate 106, the second rubber pad 114 is in a compressed state, which enhances the sealing between the cover plate 106 and the filter box 105. At the same time, one side of the first rubber pad 111 extends to the outside of the filter box 105 and is squeezed when the cover plate 106 is installed, which increases the sealing between the cover plate 106 and the frame 110. The other side of the first rubber pad 111 is tightly fitted to the side wall of the filter box 105. When the frame 110 is installed inside the filter box 105, the sealing between the frame 110 and the inner side wall of the filter box 105 is further enhanced, thereby improving the gas filtration effect.

[0045] Furthermore;

[0046] In an optional embodiment, symmetrically arranged positioning locking pins 115 are fixed on both the front and rear sides of the cover plate 106, and a socket 116 that is inserted into and limited by the positioning locking pins 115 is fixed on the side of the filter box 105.

[0047] In this embodiment: a positioning locking pin 115 is installed on the cover plate 106, and a socket 116 is installed on the filter box 105; when installing the cover plate 106, the positioning locking pin 115 is inserted into the slot opened in the socket 116 to further ensure the installation stability of the cover plate 106.

[0048] The working principle and usage process of this utility model are as follows: During use, propane is injected into the propane cylinder 101 through the inlet pipe 102. As the amount of propane in the cylinder increases, the internal pressure also rises. The pressure monitor 119 monitors the internal pressure of the propane cylinder 101 in real time. When the pressure inside the cylinder approaches the pressure in the return tank (not shown in the figure), the control unit automatically opens the electromagnetic control valve 108 on the first return pipe 104. At this time, some of the propane gas in the propane cylinder 101 flows to the return tank through the first return pipe 104, the filter box 105, and the second return pipe 107, thus realizing the gas return operation. When the propane gas passes through the filter box 105, the filter screen 109 filters the gas, effectively removing solid particles, oil, dust, and other impurities. This filtration function ensures that the gas returned to the return tank remains highly pure, thereby maintaining the internal cleanliness of the equipment and avoiding wear and contamination caused by impurities.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gas reflux device for propane filling, comprising a propane cylinder (101), one side of the propane cylinder (101) is fixedly communicated with a gas inlet pipe (102), the front side of the propane cylinder (101) is fixedly communicated with a gas outlet pipe (103), characterized in that: Also include: Propane cylinder (101), the propane cylinder (101) is installed on the inside of the gas pressure detection gas pressure monitor (119); First reflux tube (104), fixed communication in the other side of propane cylinder (101); Filter box (105), fixedly installed on the outer side of propane cylinder (101), and the top of the filter box (105) is fixedly communicated with one end of the first reflux tube (104), and the filter box (105) is designed as an open structure; Second reflux tube (107), fixedly communicated at the bottom of filter box (105), and the other end is connected with reflux tank; Cover plate (106), provided at the opening of filter box (105); Filter screen (109), provided with two groups and located inside filter box (105), used for filtering reflux gas; Electromagnetic control valve (108), installed on the first reflux tube (104).

2. The propane filling gas return device according to claim 1, characterized in that: A plurality of elastic buckles (117) are installed between the filter box (105) and the cover plate (106).

3. The propane gas refill device for filling propane cylinders as claimed in claim 1 wherein: Frame (110) is arranged inside the filter box (105) close to the filter screen (109), the filter screen (109) is fixed on the inner side wall of the frame (110), the horizontal beam plate (112) is fixed on the inner side wall of the filter box (105) close to the frame (110), the horizontal beam plate (112) and the filter box (105) are fixedly connected, the symmetrically arranged buckle blocks (113) are fixed on one end of the lower surface of the frame (110), and the clamping grooves matched with the buckle blocks (113) are formed in the lower surface of the horizontal beam plate (112).

4. The propane gaseous refueling system of claim 3, wherein: The first rubber pad (111) is fixed on the outer frame surface of the frame (110), the second rubber pad (114) is fixed on one side of the cover plate (106), one side of the first rubber pad (111) extends to the outside of the filter box (105), and the remaining side surfaces are tightly attached to the side walls of the filter box (105).

5. The propane gas refill device of claim 1, wherein: The positioning lock pin (115) is fixed on the front and rear sides of the cover plate (106), and the socket (116) is fixed on the side surface of the filter box (105) and is inserted into the positioning lock pin (115) for limiting.

6. The propane gas refill device of claim 1, wherein: The other side of the cover plate (106) is fixed with a handle (118).

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