Explosion-proof welding double pipe

Abstract

The utility model relates to the technical field of welding double pipes, and discloses an explosion-proof welding double pipe which comprises an explosion-proof valve, the explosion-proof valve comprises an air inlet valve body and an air outlet valve body, the air inlet valve body is connected with an oxygen inlet pipe and an acetylene inlet pipe, and the air outlet valve body is connected with an oxygen outlet pipe and an acetylene outlet pipe. An air outlet through hole, an oxygen outlet hole and an acetylene outlet hole are formed in the air outlet valve body, and an exhaust hole is formed in the position, between the oxygen outlet hole and the acetylene outlet hole, of the inner wall of the air outlet through hole; the gas inlet valve body is provided with the exhaust ring groove, and the gas outlet valve body is provided with the exhaust hole, so that leaked gas is guided by the exhaust ring groove to be smoothly exhausted from the exhaust hole, and the risk that mixed gas explodes in a closed space is avoided.

Description

Technical Field

[0001] This utility model relates to the field of welded double-pipe technology, specifically to an explosion-proof welded double-pipe. Background Technology

[0002] The gases used in the welding process are mainly oxygen and acetylene. Oxygen, as an oxidizing gas, is mainly mixed with combustible gases such as acetylene for gas welding. Acetylene, as a combustible gas, is often mixed with oxygen for gas welding.

[0003] The transportation of oxygen and acetylene requires two separate pipelines: an oxygen pipeline and an acetylene pipeline. To facilitate the installation and use of the oxygen and acetylene pipelines, they are usually wound around a hose reel.

[0004] The valve body used on ordinary hose reels does not take explosion-proof measures into account, so it is difficult to detect when there is a leak in the valve body. In addition, oxygen and acetylene can easily explode in a confined space. Therefore, this utility model proposes an explosion-proof welded double pipe. Utility Model Content

[0005] In order to solve the problems existing in the prior art, this utility model provides an explosion-proof welded double pipe with a simple and reasonable structural design and explosion-proof effect.

[0006] The technical solution of this utility model is as follows:

[0007] An explosion-proof welded double pipe includes an explosion-proof valve, which comprises an inlet valve body and an outlet valve body. The inlet valve body is connected to an oxygen inlet pipe and an acetylene inlet pipe, and the outlet valve body is connected to an oxygen outlet pipe and an acetylene outlet pipe. The outlet valve body has an outlet through hole, an oxygen outlet hole, and an acetylene outlet hole. An exhaust hole is provided on the inner wall of the outlet through hole at a position between the oxygen outlet hole and the acetylene outlet hole.

[0008] Furthermore, the intake valve body adopts a T-shaped structure, including an intake seat and an intake column connected to the intake seat.

[0009] Furthermore, the air intake seat has an oxygen intake port and an acetylene intake port radially provided, and the air intake column has an oxygen intake channel and an acetylene intake channel axially provided inside. The oxygen intake port is connected to the oxygen intake channel, and the acetylene intake port is connected to the acetylene intake channel.

[0010] Furthermore, the outer wall of the air intake column is provided with an oxygen venting ring groove and an acetylene venting ring groove. The oxygen venting ring groove is provided with an oxygen vent hole, and the acetylene venting ring groove is provided with an acetylene vent hole. The oxygen vent hole is connected to the oxygen intake channel, and the acetylene vent hole is connected to the acetylene intake channel.

[0011] Furthermore, the oxygen ventilation ring groove is provided with sealing ring mounting grooves on both sides, and the acetylene ventilation ring groove is also provided with sealing ring mounting grooves on both sides. An exhaust ring groove is provided between the sealing ring mounting grooves on the opposite side of the oxygen ventilation ring groove and the acetylene ventilation ring groove, and the exhaust ring groove corresponds to the position of the exhaust hole.

[0012] Furthermore, the intake seat of the intake valve body is provided with process holes at positions corresponding to the oxygen intake channel and the acetylene intake channel, which facilitates the processing of the oxygen intake channel and the acetylene intake channel.

[0013] Furthermore, the exhaust port is located on the thin-walled side of the exhaust valve body, while the oxygen exhaust port and acetylene exhaust port are located on the thick-walled side of the exhaust valve body.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1) This utility model provides an exhaust ring groove on the intake valve body and an exhaust hole on the exhaust valve body, thereby guiding the leaked gas through the exhaust ring groove and smoothly discharging it through the exhaust hole, thus avoiding the risk of explosion of the mixed gas in a confined space.

[0016] 2) This utility model allows for manual detection of whether the valve body is leaking by setting an exhaust hole on the exhaust valve body, thus ensuring the safe use of the dual pipes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the intake valve body of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the intake valve body of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the air outlet valve body of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the air outlet valve body of this utility model;

[0022] In the diagram: 1. Intake valve body; 11. Intake seat; 12. Intake column; 101. Oxygen inlet port; 102. Oxygen vent port; 103. Acetylene vent ring groove; 104. Oxygen vent ring groove; 105. Sealing ring mounting groove; 106. Acetylene inlet port; 107. Acetylene vent port; 108. Oxygen inlet channel; 109. Acetylene inlet channel; 110. Exhaust ring groove; 2. Outlet valve body; 201. Outlet port; 202. Oxygen outlet port; 203. Acetylene outlet port; 204. Exhaust port; 3. Oxygen inlet pipe; 4. Acetylene inlet pipe; 5. Oxygen outlet pipe; 6. Acetylene outlet pipe. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, an explosion-proof welded double pipe includes an inlet valve body 1, an outlet valve body 2, an oxygen inlet pipe 3, an acetylene inlet pipe 4, an oxygen outlet pipe 5, and an acetylene outlet pipe 6; wherein the inlet valve body 1 and the outlet valve body 2 are connected in cooperation, the oxygen inlet pipe 3 and the acetylene inlet pipe 4 are connected to the inlet valve body 1, and the oxygen outlet pipe 5 and the acetylene outlet pipe 6 are connected to the outlet valve body 2.

[0025] like Figure 2 , 3 As shown, the intake valve body 1 adopts a T-shaped structure, including an intake seat 11 and an intake column 12; an oxygen intake port 101 and an acetylene intake port 106 are radially provided on the intake seat 11, and the oxygen intake port 101 and the acetylene intake port 106 are located at different positions in the circumferential direction of the intake seat 11; the oxygen intake port 101 and the acetylene intake port 106 are respectively connected to the oxygen intake pipe 3 and the acetylene intake pipe 4.

[0026] The intake column 12 has an oxygen intake channel 108 and an acetylene intake channel 109 axially arranged inside, with the oxygen intake channel 108 and the acetylene intake channel 109 located at different positions in the circumferential direction inside the intake column 12.

[0027] The oxygen inlet 101 is connected to the oxygen inlet channel 108, and the acetylene inlet 106 is connected to the acetylene inlet channel 109.

[0028] The intake seat 11 of the intake valve body 1 has process holes at positions corresponding to the oxygen intake channel 108 and the acetylene intake channel 109 for machining the oxygen intake channel 108 and the acetylene intake channel 109. The process holes need to be sealed to prevent air leakage.

[0029] Two ventilation ring grooves are provided at intervals on the outer wall of the air intake column 12, namely oxygen ventilation ring groove 104 and acetylene ventilation ring groove 103. Oxygen ventilation ring groove 104 is provided with oxygen ventilation hole 102, and acetylene ventilation ring groove 103 is provided with acetylene ventilation hole 107. Oxygen ventilation hole 102 is connected to oxygen intake channel 108, and acetylene ventilation hole 107 is connected to acetylene intake channel 109.

[0030] To ensure gas isolation and sealing inside the valve body, sealing ring mounting grooves 105 are provided on both sides of the oxygen venting ring groove 104, and sealing ring mounting grooves 105 are also provided on both sides of the acetylene venting ring groove 103. Sealing rings are installed in the sealing ring mounting grooves 105.

[0031] Prolonged use or quality issues can cause the sealing rings to fail, leading to gas mixing in the oxygen vent ring groove 104 and the acetylene vent ring groove 103. Therefore, an exhaust ring groove 110 is provided between the sealing ring mounting grooves 105 on opposite sides of the oxygen vent ring groove 104 and the acetylene vent ring groove 103, with the exhaust ring groove 110 corresponding to the exhaust port 204. Leaked gas can be discharged through the exhaust ring groove 110 and the exhaust port 204.

[0032] like Figure 4 , 5 As shown, the exhaust valve body 2 is provided with an exhaust through hole 201, an oxygen exhaust hole 202, and an acetylene exhaust hole 203. The exhaust through hole 201 cooperates with the intake column 12 of the intake valve body 1 to realize the installation between the intake valve body 1 and the exhaust valve body 2. The oxygen exhaust hole 202 and the acetylene exhaust hole 203 are respectively connected to the oxygen exhaust pipe 5 and the acetylene exhaust pipe 6.

[0033] An exhaust port 204 is provided on the inner wall of the exhaust port 201 at a position between the oxygen exhaust port 202 and the acetylene exhaust port 203.

[0034] In this embodiment, for ease of processing, the exhaust port 204 is located on the thin-walled side of the exhaust valve body 2, avoiding the increased manufacturing difficulty caused by machining the hole on the thick-walled side.

[0035] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. An explosion-proof welded double pipe, characterized in that, The device includes an explosion-proof valve, which includes an inlet valve body (1) and an outlet valve body (2). The inlet valve body (1) is connected to an oxygen inlet pipe (3) and an acetylene inlet pipe (4). The outlet valve body (2) is connected to an oxygen outlet pipe (5) and an acetylene outlet pipe (6). The outlet valve body (2) is provided with an outlet through hole (201), an oxygen outlet hole (202) and an acetylene outlet hole (203). The inner wall of the outlet through hole (201) is provided with an exhaust hole (204) located between the oxygen outlet hole (202) and the acetylene outlet hole (203).

2. The explosion-proof welded double pipe according to claim 1, characterized in that, The intake valve body (1) adopts a T-shaped structure, including an intake seat (11) and an intake column (12) connected to the intake seat (11).

3. The explosion-proof welded double pipe according to claim 2, characterized in that, The air intake seat (11) is provided with an oxygen intake hole (101) and an acetylene intake hole (106) along the radial direction. The air intake column (12) is provided with an oxygen intake channel (108) and an acetylene intake channel (109) along the axial direction. The oxygen intake hole (101) is connected to the oxygen intake channel (108), and the acetylene intake hole (106) is connected to the acetylene intake channel (109).

4. The explosion-proof welded double pipe according to claim 3, characterized in that, The outer wall of the air intake column (12) is provided with an oxygen ventilation ring groove (104) and an acetylene ventilation ring groove (103). The oxygen ventilation ring groove (104) is provided with an oxygen ventilation hole (102), and the acetylene ventilation ring groove (103) is provided with an acetylene ventilation hole (107). The oxygen ventilation hole (102) is connected to the oxygen intake channel (108), and the acetylene ventilation hole (107) is connected to the acetylene intake channel (109).

5. The explosion-proof welded double pipe according to claim 4, characterized in that, The oxygen ventilation ring groove (104) is provided with sealing ring mounting grooves (105) on both sides, and the acetylene ventilation ring groove (103) is also provided with sealing ring mounting grooves (105) on both sides. An exhaust ring groove (110) is provided between the sealing ring mounting grooves (105) on the opposite side of the oxygen ventilation ring groove (104) and the acetylene ventilation ring groove (103). The exhaust ring groove (110) corresponds to the position of the exhaust hole (204).

6. The explosion-proof welded double pipe according to claim 3, characterized in that, The exhaust port (204) is located on the thin wall side of the exhaust valve body (2), while the oxygen exhaust port (202) and the acetylene exhaust port (203) are located on the thick wall side of the exhaust valve body (2).

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