Heat insulation valve seat of oxygen sensor

Abstract

The utility model relates to the technical field of automobile exhaust systems, in particular to a heat insulation valve seat of an oxygen sensor, which comprises a through pipe, the left side of the outer wall of the through pipe is fixedly connected with a fixing plate, the left side of the through pipe is fixedly connected with a monitoring head, and the right side of the monitoring head is fixedly connected with a signal line pipe. And the right end of the signal line pipe penetrates through the through pipe and is fixedly connected with an inductor, an adjusting mechanism is arranged on the right side of the outer wall of the through pipe, and an assembling mechanism is arranged on the right side of the fixing plate. Self-adaptive adjustment of the valve seat is achieved through the adjusting mechanism, the limiting seat valve seat can be conveniently fixed to a mounting hole of the exhaust pipe, meanwhile, limiting assembly of the heat insulation ring is achieved through the assembling mechanism, a heat insulation assembly of the valve seat can be replaced for part of devices, and the stability and durability of the devices are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile exhaust systems, and specifically relates to a heat insulation valve seat for an oxygen sensor. Background Technique

[0002] On engines that use a three-way catalytic converter to reduce exhaust pollution, an oxygen sensor is an essential component. The oxygen sensor is an important part of the engine exhaust system, installed on the automobile exhaust pipe, used to sense the oxygen concentration in the exhaust pipe, so as to achieve closed-loop control. Its working principle is: under certain conditions, using the oxygen concentration difference inside and outside the zirconia, a potential difference is generated to detect the oxygen concentration, generally used to control automobile exhaust emissions, reduce the environmental pollution of automobiles, and improve the fuel combustion quality of automobile engines.

[0003] The existing device mainly fixes the valve seat on the installation hole of the exhaust pipe through components such as bolts. The existing technology is mostly similar to the oxygen sensor valve seat. The structure of the patent number CN219388002U includes a valve seat body. A through hole extending along the axial direction of the valve seat body and penetrating through its two end faces is provided on the valve seat body. A radial boss is provided at the lower end of the inner peripheral wall of the through hole; an annular heat insulation gasket is provided in the through hole, and the lower end of the annular heat insulation gasket abuts against the top of the radial boss; a heat insulation sleeve is provided in the through hole, and the bottom of the heat insulation sleeve abuts against the upper end of the annular heat insulation gasket. By arranging the annular heat insulation gasket and the heat insulation sleeve in the through hole of the valve seat body, the oxygen sensor can be separated from the valve seat body, reducing the heat transfer between the oxygen sensor and the valve seat, and avoiding the loosening of the connection between the valve seat and the oxygen sensor or the exhaust pipe installation hole due to the thermal deformation of the valve seat, thereby ensuring the detection accuracy of the oxygen sensor.

[0004] The existing device mainly limits and fixes the valve seat through structures such as bolts, so that gaps are likely to be generated between some valve seats and the installation holes after thermal deformation, resulting in a large amount of tail gas escaping. At the same time, some devices mainly fix the heat insulation material on the valve seat, making it difficult to replace the heat insulation components of some valve seats, resulting in a lower service life of some valve seats, reducing the working efficiency and practicability of the device. Therefore, in order to solve the above problems, a heat insulation valve seat for an oxygen sensor is proposed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a heat insulation valve seat for an oxygen sensor to solve the problems in the existing technology mentioned in the above background technology, that is, the existing device mainly limits and fixes the valve seat through structures such as bolts, so that gaps are likely to be generated between some valve seats and the installation holes after thermal deformation, resulting in a large amount of tail gas escaping. At the same time, some devices mainly fix the heat insulation material on the valve seat, making it difficult to replace the heat insulation components of some valve seats, resulting in a lower service life of some valve seats.

[0006] To achieve the above object, the present utility model provides the following technical solution: A heat insulation valve seat for an oxygen sensor, comprising a through pipe, a fixing plate is fixedly connected to the left side of the outer wall of the through pipe, a monitoring head is fixedly connected to the left side of the through pipe, a signal wire pipe is fixedly connected to the right side of the monitoring head, and the right end of the signal wire pipe penetrates through the through pipe and is fixedly connected to a sensor;

[0007] An adjusting mechanism is provided on the right side of the outer wall of the through pipe. The adjusting mechanism includes an adjusting thread, which is provided on the right side of the outer wall of the through pipe. An assembling mechanism is provided on the right side of the fixing plate. The assembling mechanism includes a heat insulation ring, and the left side of the heat insulation ring fits against the outer ring on the right side of the fixing plate.

[0008] Preferably, an adjusting screw cylinder is threadedly connected to the outer wall of the adjusting thread. A sliding ring is attached to the left side of the adjusting screw cylinder, and the inner wall of the sliding ring is sleeved on the outer wall of the through pipe.

[0009] Preferably, a spring is fixedly connected to the outer ring of the through pipe on the left side of the sliding ring, and the left end of the spring is fixedly connected to a limiting seat.

[0010] Preferably, the inner wall of the limiting seat is sleeved on the outer wall of the through pipe, and the overall shape of the limiting seat is frustum-shaped.

[0011] Preferably, three limiting pins are evenly and fixedly connected to the outer ring on the right side of the fixing plate.

[0012] Preferably, a card slot corresponding to the limiting pin is provided on the outer wall of the heat insulation ring.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. Through the structures such as the adjusting thread, adjusting screw cylinder, sliding ring, spring and limiting seat in the adjusting mechanism of the present utility model, by clockwise rotating the adjusting screw cylinder, the adjusting screw cylinder can push the sliding ring to slide leftward. The sliding ring compresses the spring and applies a leftward pressure to the limiting seat. The limiting seat is inserted outside the installation hole of the exhaust pipe in cooperation. When the valve seat and the installation hole of the exhaust pipe are deformed by heat, the spring can drive the limiting seat to slide adaptively through the expansion and contraction of the spring, so that the outer wall of the limiting seat can always be closely attached to the installation hole of the exhaust pipe, realizing the adaptive adjustment of the valve seat, enabling part of the device to drive the limiting seat to be clamped in the installation hole of the exhaust pipe adaptively, facilitating the stable fixing of the valve seat on the installation hole of the exhaust pipe, and improving the stability and practicability of the device.

[0015] 2. The utility model realizes the limit assembly of the heat insulation ring through structures such as the heat insulation ring, limit pin and clamping groove in the assembly mechanism. By arranging the heat insulation ring on the right side of the fixed plate, the clamping groove of the heat insulation ring is clamped on the outer wall of the limit pin, so that the heat insulation component of the valve seat can be replaced for some devices, effectively improving the service life of the valve seat and enhancing the durability and practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front-side perspective view of the structure of the utility model;

[0017] Figure 2 is the front-view sectional perspective view of the structure of the utility model;

[0018] Figure 3 is the front-view sectional perspective view of the partial structure of the intubation and adjustment mechanism of the utility model;

[0019] Figure 4 is the front-view sectional perspective view of the partial structure of the base and assembly mechanism of the utility model.

[0020] In the figure: 11, through pipe; 12, fixed plate; 13, monitoring head; 14, signal wire pipe; 15, inductor; 2, adjustment mechanism; 21, adjustment thread; 22, adjustment barrel; 23, sliding ring; 24, spring; 25, limit seat; 3, assembly mechanism; 31, heat insulation ring; 32, limit pin; 33, clamping groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present utility model:

[0023] A heat insulation valve seat of an oxygen sensor includes a through pipe 11. The left side of the outer wall of the through pipe 11 is fixedly connected with a fixed plate 12. The left side of the through pipe 11 is fixedly connected with a monitoring head 13. The right side of the monitoring head 13 is fixedly connected with a signal wire pipe 14. The right end of the signal wire pipe 14 penetrates through the through pipe 11 and is fixedly connected with an inductor 15;

[0024] On the right side of the outer wall of the through pipe 11, there is an adjusting mechanism 2. The adjusting mechanism 2 includes an adjusting thread 21 which is provided on the right side of the outer wall of the through pipe 11. A threaded connection is provided between the outer wall of the adjusting thread 21 and an adjusting screw cylinder 22. A sliding ring 23 is attached to the left side of the adjusting screw cylinder 22. The inner wall of the sliding ring 23 is sleeved on the outer wall of the through pipe 11. Through this design, it is realized that the adjusting screw cylinder 22 can push the sliding ring 23 to slide leftward. On the left side of the sliding ring 23, a spring 24 is fixedly connected to the outer ring of the through pipe 11. The left end of the spring 24 is fixedly connected to a limiting seat 25. Through this design, it is realized that the sliding ring 23 can apply a leftward pressure to the limiting seat 25 by compressing the spring 24. The inner wall of the limiting seat 25 is sleeved on the outer wall of the through pipe 11. The overall shape of the limiting seat 25 is frustum-shaped. Through this design, it is realized that the limiting seat 25 can be inserted into the mounting hole of the exhaust pipe.

[0025] On the right side of the fixing plate 12, there is an assembling mechanism 3. The assembling mechanism 3 includes a heat insulation ring 31. The left side of the heat insulation ring 31 is attached to the outer ring on the right side of the fixing plate 12. Three limiting pins 32 are evenly and fixedly connected to the outer ring on the right side of the fixing plate 12. Through this design, it is realized that the heat insulation ring 31 can be placed between the limiting pins 32. On the outer wall of the heat insulation ring 31, there are card slots 33 corresponding to the limiting pins 32. Through this design, the limiting and fixing of the heat insulation ring 31 are realized.

[0026] Working principle: During use, the heat insulation ring 31 can be placed on the right side of the fixing plate 12, so that the card slot 33 of the heat insulation ring 31 is sleeved on the outer wall of the limiting pin 32, realizing the limiting and assembling of the heat insulation ring 31. Then, the through pipe 11 is inserted into the mounting hole of the exhaust pipe, so that the monitoring head 13 and the fixing plate 12 are placed inside the exhaust pipe. Then, the limiting seat 25, the spring 24, the sliding ring 23 and the adjusting screw cylinder 22 are sequentially sleeved on the right side of the outer wall of the through pipe 11. Then, the adjusting screw cylinder 22 is rotated clockwise. Restricted by the adjusting thread 21, the adjusting screw cylinder 22 can push the sliding ring 23 to slide leftward. The sliding ring 23 compresses the spring 24 and applies a leftward pressure to the limiting seat 25. The limiting seat 25 is inserted outside the mounting hole of the exhaust pipe under the action of force. The limiting seat 25 and the fixing plate 12 cooperate to fix the through pipe 11 in the mounting hole of the exhaust pipe. When the valve seat and the mounting hole of the exhaust pipe are deformed by heat, the limiting seat 25 can be driven by the telescopic spring 24 to adaptively slide and adjust, so that the outer wall of the limiting seat 25 can always be closely attached to the mounting hole of the exhaust pipe.

[0027] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model; any ordinary technician in the industry can smoothly implement the present utility model according to what is shown in the attached drawings of the specification and the above; however, any slight changes, modifications, and equivalent variations made by those skilled in the art within the scope of the technical solution of the present utility model by using the technical content disclosed above are equivalent embodiments of the present utility model; at the same time, any changes, modifications, and equivalent variations made to the above embodiments based on the essential technology of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A heat insulation valve seat of an oxygen sensor, comprising a through pipe (11), characterized in that: On the left side of the outer wall of the through pipe (11), a fixing plate (12) is fixedly connected. On the left side of the through pipe (11), a monitoring head (13) is fixedly connected. On the right side of the monitoring head (13), a signal wire pipe (14) is fixedly connected. The right end of the signal wire pipe (14) penetrates through the through pipe (11) and is fixedly connected to a sensor (15). On the right side of the outer wall of the through pipe (11), an adjusting mechanism (2) is provided. The adjusting mechanism (2) includes an adjusting thread (21) which is opened on the right side of the outer wall of the through pipe (11). On the right side of the fixing plate (12), an assembling mechanism (3) is provided. The assembling mechanism (3) includes a heat insulation ring (31), and the left side of the heat insulation ring (31) is attached to the outer ring on the right side of the fixing plate (12).

2. The heat insulation valve seat of an oxygen sensor according to claim 1, characterized in that: An adjusting screw cylinder (22) is threadedly connected to the outer wall of the adjusting thread (21). A sliding ring (23) is attached to the left side of the adjusting screw cylinder (22), and the inner wall of the sliding ring (23) is sleeved on the outer wall of the through pipe (11).

3. The heat insulation valve seat of an oxygen sensor according to claim 2, characterized in that: On the outer ring of the through pipe (11) on the left side of the sliding ring (23), a spring (24) is fixedly connected. The left end of the spring (24) is fixedly connected to a limiting seat (25).

4. The heat insulation valve seat of an oxygen sensor according to claim 3, characterized in that: The inner wall of the limiting seat (25) is sleeved on the outer wall of the through pipe (11), and the overall shape of the limiting seat (25) is frustum-shaped.

5. The heat insulation valve seat of an oxygen sensor according to claim 1, characterized in that: Three limiting pins (32) are evenly and fixedly connected to the outer ring on the right side of the fixing plate (12).

6. The heat-insulating valve seat of an oxygen sensor according to claim 1, characterized in that: Corresponding slots (33) for the limiting pins (32) are opened on the outer wall of the heat insulation ring (31).

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