An ultrasonic gas meter outlet anti-scalding damage device

Abstract

The present invention discloses an anti-scalding damage device for the gas outlet of an ultrasonic gas meter, which relates to the technical field of ultrasonic gas meters, including a gas meter housing and a gas flow channel. An anti-scalding damage structure is provided at the corner of the gas meter flow channel, wherein the anti-scalding damage structure includes a rotating seal seat, the rotating seal seat is rotatably connected in the gas flow channel, so that the rotating seal seat can rotate around its center, a groove is provided at the center of the top of the rotating seal seat, a heat expansion air bag is provided on the inner bottom surface of the groove, the top surface of the rotating seal seat from the groove to the two ends is set as an inclined surface, the two ends of the rotating seal seat are sealed and abutted against the inner side surface of the flow channel, and the two end top surfaces of the rotating seal seat are connected to the gas flow channel through a return spring. The present invention has the effect of arranging an anti-scalding damage structure on the gas flow channel, when a hot iron ball enters the gas flow channel, the anti-scalding damage structure guides the hot iron ball out of the gas flow channel, and ensures the normal metering work of the gas flow channel, thereby preventing the occurrence of illegal elements stealing gas.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic gas meters, and more particularly to a device for preventing scalding and damage of a gas outlet of an ultrasonic gas meter. Background Art

[0002] Ultrasonic gas meter is a new type of flow measurement technology developed in recent decades. It uses the time difference method to measure the gas flow rate. It is a gas meter that uses the fluid flow rate information carried by ultrasonic waves when they propagate in the fluid to measure the fluid flow rate. Because the error caused by the change of sound velocity with the fluid temperature in the time difference method is small and the accuracy is high, it is currently widely used. Due to its all-electronic structure, ultrasonic gas meter has no mechanical transmission part, no mechanical noise during operation, is not affected by mechanical wear and failure, and has no deterioration in measurement accuracy after long-term use. It has good durability and longer service life. There is no magnetic sensing element, and the measurement is not easily affected by the magnetic field. Compared with the previous diaphragm gas meter, it has incomparable advantages in volume, accuracy, repeatability, life, maintenance, and intelligent expansion.

[0003] However, there are currently cases of gas theft from ultrasonic gas meters. Some lawless elements will throw a hot iron ball into the gas outlet of the ultrasonic gas meter, causing the hot iron ball to roll along the flow channel to the innermost end of the flow channel. Due to the high temperature of the iron ball, the inner end of the flow channel will be burned. Once the flow channel is burned, the gas will flow out of the flow channel, and the gas meter will be stolen. In addition, the measurement accuracy of the ultrasonic gas meter will also be inaccurate, which has a great impact on the normal gas use of users.

[0004] Based on the above problems, the present invention proposes a device for preventing the outlet of an ultrasonic gas meter from being scalded and damaged, which can prevent gas theft. Summary of the invention

[0005] In view of this problem in practical application, the present invention aims to provide an ultrasonic gas meter outlet anti-scalding damage device, and the specific scheme is as follows:

[0006] An ultrasonic gas meter outlet anti-scalding damage device comprises a gas meter housing, an air inlet, an air outlet and a gas flow channel installed in the gas meter housing, wherein the two ends of the gas meter flow channel are respectively connected to the air inlet and the air outlet, and an anti-scalding damage structure is provided at the corner of the gas meter flow channel, wherein:

[0007] The anti-scalding damage structure includes a rotating sealing seat, which is rotatably connected to the gas flow channel so that the rotating sealing seat can rotate around its center. A groove is provided at the center of the top of the rotating sealing seat, and a heat expansion airbag is provided on the inner bottom surface of the groove. The top surface of the rotating sealing seat from the groove to the two ends is set as an inclined surface, and the height of the inclined surface gradually decreases from the groove to the two ends. The two ends of the rotating sealing seat are sealed and abutted against the inner side surface of the flow channel, and the top surfaces of the two ends of the rotating sealing seat are connected to the gas flow channel through a return spring.

[0008] Furthermore, a variable diameter channel is provided in the gas flow channel, the top of the variable diameter channel is connected to the gas flow channel, and the bottom end is a guide groove. The diameter of the variable diameter channel gradually decreases from top to bottom, and the bottom end diameter of the variable diameter channel is not greater than the diameter of the groove.

[0009] Furthermore, abutment blocks are provided on the inner side of the gas flow channel at both ends of the rotary seal seat, and a sealing ring is provided on the abutment block. The sealing ring is installed between the gas flow channel and the rotary seal seat.

[0010] Furthermore, the outer end surfaces at both ends of the rotary seal seat are configured as outwardly convex arc surface structures, and the inner side surface of the sealing ring is configured as an inwardly concave arc surface structure matching the outer end surfaces of the rotary seal seat.

[0011] Furthermore, chamfers are provided at the corners between the outer end surfaces at both ends of the rotary seal seat and the outer top surface.

[0012] Furthermore, a chamfer is provided at the connection between the outer top surface of the groove and the inclined surface.

[0013] Furthermore, a rotating shaft is provided at the center of the rotating seal seat, and the rotating seal seat is rotatably connected to the gas flow channel via the rotating shaft.

[0014] Furthermore, the thermal expansion airbag is filled with thermal expansion particles, and the thermal expansion airbag is made of high temperature resistant material.

[0015] Furthermore, the rotary seal seat is made of high temperature resistant, lightweight and hard material.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, an anti-scalding damage structure is arranged on the gas flow channel. When a hot iron ball enters the gas flow channel, the anti-scalding damage structure guides the hot iron ball out of the gas flow channel and ensures the normal metering work of the gas flow channel. This can prevent the hot iron ball from scalding the gas flow channel, avoid the occurrence of illegal elements stealing gas, ensure the normal operation of the ultrasonic gas meter, and have a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is an overall schematic diagram of an embodiment of the present invention;

[0018] Figure 2 The figure is a schematic diagram of the overall structure of the anti-scalding damage structure in the present invention (installed in the gas flow channel);

[0019] Figure 3 This is a schematic diagram of the initial state of the anti-scalding damage structure of the present invention after encountering an iron ball (after the thermal expansion airbag is expanded);

[0020] Figure 4 It is a schematic diagram of the process state of the anti-scalding damage structure in the present invention after encountering an iron ball (the iron ball is rolling outward).

[0021] Figure numerals: 1. gas meter housing; 2. air inlet; 3. air outlet; 4. gas flow channel; 5. anti-scalding damage structure; 51. rotating sealing seat; 52. groove; 53. thermal expansion airbag; 54. return spring; 55. rotating shaft; 6. abutment block; 7. sealing ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] like Figure 1-2 As shown, an ultrasonic gas meter outlet anti-scalding damage device comprises a gas meter housing 1, an air inlet 2, an air outlet 3, and a gas flow channel 4 installed in the gas meter housing 1. The two ends of the gas meter flow channel are respectively connected to the air inlet 2 and the air outlet 3. As can be seen from the figure, the gas flow channel 4 is an L-shaped structure as a whole. The top of the L-shaped structure is connected to the air outlet 3.

[0025] When the ultrasonic gas meter works normally, it measures the gas by detecting the gas flowing through the gas flow channel 4. However, some criminals currently put a hot iron ball into the gas outlet 3, and the hot iron ball enters the gas flow channel 4 through the L gas outlet 3. The hot iron ball rolls from one end of the L-shaped structure to the other end. Due to the high temperature on the hot iron ball, the hot iron ball rolling to the other end of the gas flow channel 4 will burn the gas flow channel 4, so that the gas flow channel 4 will leak. The criminals use the leaking gas meter to steal gas. In order to avoid the occurrence of such gas theft, the present application invents an ultrasonic gas meter anti-scalding damage device.

[0026] Specifically, a through groove is opened at the corner of the gas flow channel 4, and an anti-scalding damage structure 5 is provided at the corner of the gas meter flow channel, that is, the anti-scalding damage structure 5 is installed in the through groove, wherein the anti-scalding damage structure 5 includes a rotating sealing seat 51, and the rotating sealing seat 51 is rotatably connected in the gas flow channel 4 so that the rotating sealing seat 51 can rotate around its center, and a groove 52 is provided at the center of the top of the rotating sealing seat 51, and the groove 52 is provided with an arc groove structure, and a heat expansion airbag 53 is provided on the inner bottom surface of the groove 52. The top surface of the rotating sealing seat 51 from the groove 52 to its two ends is set as an inclined surface, and the height of the inclined surface gradually decreases from the groove 52 to the two ends. The two ends of the rotating sealing seat 51 are sealed and abutted against the inner side surface of the flow channel, and the top surfaces of both ends of the rotating sealing seat 51 are connected to the gas flow channel 4 through return springs 54.

[0027] A rotating shaft 55 is provided at the center of the rotating seal seat 51, and the rotating seal seat 51 is rotatably connected to the gas flow channel 4 via the rotating shaft 55. The rotation of the rotating seal seat 51 is achieved via the rotating shaft 55. The rotating shaft 55 is located at the exact center of the rotating seal seat 51, and the rotating seal seat 51 is in a completely balanced state under normal conditions.

[0028] When the ultrasonic gas meter is measuring normally, both ends of the rotating seal seat 51 are sealed and abut against the inner wall of the through groove of the gas flow channel 4, and the entire gas flow channel 4 is in a normal measuring state; when the criminals throw the hot iron ball into the gas flow channel 4, Figure 3 As shown, when the hot iron ball passes through the through groove, it falls into the groove 52 on the rotary seal seat 51. Due to the high surface temperature of the hot iron ball, the heat expansion airbag 53 expands when heated, that is, the heat expansion airbag 53 bulges upward in the groove 52, and at the same time pushes the hot iron ball upward. Then, as shown in FIG. Figure 4 As shown, the hot iron ball rolls toward either end and rolls downward along the inclined surface. At this time, since the weight of the hot iron ball is biased toward either end of the rotating seal seat 51, the rotating seal seat 51 loses balance, and the rotating seal seat 51 tilts and rotates toward the end where the hot iron ball rolls. The rotating seal seat 51 is separated from the gas flow channel 4, and a gap is generated. The hot iron ball rolls out through the gap. At the same time, the return spring 54 at the end where the hot iron ball rolls is stretched, and the return spring 54 accumulates elastic potential energy. When the iron ball completely rolls out of the rotating seal seat 51, the return spring 54 releases the elastic potential energy and pulls back the rotating seal seat 51, so that the rotating seal seat 51 is sealed and abutted against the inner side surface of the gas flow channel 4 again, and the gas flow channel 4 returns to the normal metering state.

[0029] In order to allow the hot iron ball rolling out of the gas flow channel 4 to be taken out of the gas meter as soon as possible, in a possible embodiment, a guide channel can be set directly below the anti-scalding structure 5, and the rolled hot iron ball can be guided out of the gas meter through the diameter of the guide channel, making it convenient for staff to inspect and repair.

[0030] In another possible embodiment, a temperature sensor is arranged directly below the anti-scalding damage structure 5, and an alarm is also arranged outside the ultrasonic gas meter. When the hot iron ball passes through the temperature sensor, the temperature sensor senses the abnormality and transmits the signal to the alarm. The alarm sounds an alarm to remind the staff to carry out maintenance.

[0031] The rotary seal seat 51 is made of high temperature resistant, light and hard material. Thus, the high temperature resistant property: when the hot iron ball contacts the rotary seal seat 51, the rotary seal seat 51 will not be damaged, and the rotary seal seat 51 can be reused; the light and hard material: the weight of the rotary seal seat 51 can be reduced as much as possible, and when the iron ball rolls on it, the rotary seal seat 51 can be easily rotated, thereby ensuring the normal extraction of the hot iron ball.

[0032] The heat expansion airbag 53 is filled with heat expansion particles, preferably, the heat expansion particles are made of high temperature resistant material. The setting of high temperature resistant material helps to prevent the heat expansion airbag 53 from being scalded, ensuring the normal operation of the heat expansion airbag 53.

[0033] In addition, in order to ensure that the hot iron ball entering the gas flow channel 4 from the gas outlet 3 can enter the groove 52 with 100% accuracy, a variable diameter channel is also provided in the gas flow channel 4. The top of the variable diameter channel is connected to the gas flow channel 4, and the bottom end guides the groove 52. The diameter of the variable diameter channel gradually decreases from top to bottom, and the bottom diameter of the variable diameter channel is not greater than the diameter of the groove 52. Preferably, the variable diameter channel is arranged along the vertical direction of the gas flow channel 4. In this way, when the hot iron ball enters the gas flow channel 4, due to the arrangement of the variable diameter channel, the hot iron ball enters the variable diameter channel, and the bottom end of the variable diameter channel is aligned with the groove 52 and has a diameter smaller than the groove 52. In this way, the hot iron ball entering the variable diameter channel will surely fall into the groove 52, thereby ensuring the normal operation of the anti-scalding damage structure 5.

[0034] Moreover, the top diameter of the variable diameter channel is not larger than the inner diameter of the gas flow channel 4, so as to avoid the variable diameter channel blocking the gas flow channel 4 and affecting the normal metering of the gas flow channel 4, thereby ensuring the normal metering of the gas flow channel 4.

[0035] Furthermore, in order to ensure that the anti-scalding device does not affect the normal metering of the gas flow channel 4, it is necessary to ensure the sealing between the anti-scalding structure 5 and the gas flow channel 4. Therefore, in the present application, the inner side of the gas flow channel 4 is provided with abutment blocks 6 at both ends of the rotary seal seat 51, and a sealing ring 7 is provided on the abutment block 6. The sealing ring 7 is installed between the gas flow channel 4 and the rotary seal seat 51. The provision of the sealing ring 7 can help to preliminarily improve the sealing between the rotary seal seat 51 and the gas flow channel 4. Preferably, the sealing ring 7 is made of heat-resistant material to prevent the sealing ring 7 from being damaged by the hot iron ball when passing through, thereby ensuring the normal sealing performance of the sealing ring 7.

[0036] In order to further improve the sealing performance between the gas flow channel 4 and the rotary seal seat 51, in the present application, the outer end surfaces of both ends of the rotary seal seat 51 are set as an outwardly convex arc surface structure, and the inner side surface of the sealing ring 7 is set as an inwardly concave arc surface structure matching the outer end surface of the rotary seal seat 51. The setting of the arc surface structure helps to increase the contact area between the gas flow channel 4, the sealing ring 7 and the abutment block 6, improve the sealing performance, and the inward concave structure on the sealing ring 7 and the outward convex structure on the rotary seal seat 51 help to further improve the sealing performance between the two compared with the plane contact.

[0037] In addition, in order to improve the smoothness of the rolling of the hot iron ball, a number of chamfers are provided at the connection between the structures in the present application.

[0038] First, a chamfer is provided at the connection between the outer top surface of the groove 52 and the inclined surface. The setting of the chamfer can avoid the situation of jamming when the hot iron ball rolls from the groove 52 to the inclined surface due to the protrusion at the turning point between the two, thereby ensuring the smoothness of the rolling of the hot iron ball.

[0039] Secondly, chamfers are provided at the corners between the outer end surfaces and the outer top surface at both ends of the rotary seal seat 51. Preferably, the chamfers are rounded. The setting of the chamfers can not only improve the rolling smoothness of the hot iron ball passing through the corners; but also improve the smoothness of the rotary seal seat 51 when it is separated from the abutment block 6 and returned to the abutment block 6, thereby improving the work efficiency.

[0040] The specific implementation principle of the present invention is: when the anti-scalding damage structure 5 is working, first, the hot iron ball enters through the air inlet 2, the gas flow channel 4, and the reducing channel and falls into the groove 52 on the rotating sealing seat 51, and the hot iron ball is in thermal contact with the thermal expansion airbag 53. The thermal expansion airbag 53 expands when heated and lifts the hot iron ball. The hot iron ball rolls toward one end through the inclined surface. Under the gravity of the hot iron ball, the rotating sealing seat 51 is unbalanced, so that it is separated from the gas flow channel 4, and the hot iron ball rolls out of the gas flow channel 4. At the same time, the return spring 54 pulls the rotating sealing seat 51 back to the initial state, so that it is in a normal sealing state with the gas flow channel 4, and the gas flow channel 4 returns to a normal working state. In this way, the hot iron ball can be prevented from scalding the gas flow channel 4, and the situation of lawless elements stealing gas can be avoided, thereby ensuring the normal operation of the ultrasonic gas meter.

[0041] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An ultrasonic gas meter outlet anti-scalding damage device, comprising a gas meter housing (1), an air inlet (2), an air outlet (3), and a gas flow channel (4) installed in the gas meter housing (1), wherein two ends of the gas flow channel (4) are respectively connected to the air inlet (2) and the air outlet (3), and characterized in that: The gas meter flow channel corner is provided with an anti-scalding damage structure (5), wherein: The anti-scalding damage structure (5) comprises a rotary sealing seat (51), the rotary sealing seat (51) is rotatably connected to the gas flow channel (4) so ​​that the rotary sealing seat (51) can rotate around its center, a groove (52) is provided at the center of the top of the rotary sealing seat (51), a heat expansion airbag (53) is provided on the inner bottom surface of the groove (52), the top surface of the rotary sealing seat (51) from the groove (52) to the two ends is set as an inclined surface, the height of the inclined surface gradually decreases from the groove (52) to the two ends, the two ends of the rotary sealing seat (51) are sealed and abutted against the inner side surface of the flow channel, and the top surfaces of the two ends of the rotary sealing seat (51) are connected to the gas flow channel (4) through return springs (54); A variable diameter channel is also provided in the gas flow channel (4), the top end of the variable diameter channel is connected to the gas flow channel (4), and the bottom end is a guide groove (52), the diameter of the variable diameter channel gradually decreases from top to bottom, and the bottom end diameter of the variable diameter channel is not greater than the diameter of the groove (52); Abutment blocks (6) are provided on the inner side surface of the gas flow channel (4) at both ends of the rotary seal seat (51), and a sealing ring (7) is provided on the abutment block (6). The sealing ring (7) is installed between the gas flow channel (4) and the rotary seal seat (51).

2. The ultrasonic gas meter outlet anti-scalding damage device according to claim 1, characterized in that: The outer end surfaces at both ends of the rotary seal seat (51) are configured as outwardly convex arc surface structures, and the inner side surface of the sealing ring (7) is configured as an inwardly concave arc surface structure matching the outer end surfaces of the rotary seal seat (51).

3. The ultrasonic gas meter outlet anti-scalding damage device according to claim 1, characterized in that: Chamfers are provided at the corners between the outer end surfaces at both ends and the outer top surface of the rotary seal seat (51).

4. The ultrasonic gas meter outlet anti-scalding damage device according to claim 1, characterized in that: A chamfer is provided at the connection between the outer top surface of the groove (52) and the inclined surface.

5. The ultrasonic gas meter outlet anti-scalding damage device according to claim 1, characterized in that: A rotating shaft (55) is provided at the center of the rotating seal seat (51), and the rotating seal seat (51) is rotatably connected to the gas flow channel (4) via the rotating shaft (55).

6. The ultrasonic gas meter outlet anti-scalding damage device according to claim 1, characterized in that: The heat expansion airbag (53) is filled with heat expansion particles, and the heat expansion airbag (53) is made of a high temperature resistant material.

7. The ultrasonic gas meter outlet anti-scalding damage device according to claim 1, characterized in that: The rotary seal seat (51) is made of a high temperature resistant, lightweight and hard material.

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