Pressure tapping pipe and gas water heating equipment

Abstract

The utility model relates to the technical field of heating, in particular to a pressure tapping pipe and gas water heating equipment, and the pressure tapping pipe comprises a pipe body provided with a containing cavity; a partition part is arranged in the containing cavity of the pipe body, a water outlet is formed in the partition part, and the partition part divides the containing cavity into a first cavity and a second cavity; the pipe body is provided with a drainage end, a first connecting end and a second connecting end, and the first connecting end and the second connecting end are respectively communicated with the first cavity; the switch valve mechanism comprises a reset piece and a sealing piece, and the reset piece is suitable for applying thrust towards the water outlet to the sealing piece so that the sealing piece can abut against the separation part and seal the water outlet. According to the embodiment of the utility model, through the arrangement of the switch valve mechanism, when the condensate water in the pressure tapping pipe is more, the water outlet can be automatically opened, so that the condensate water is discharged, the accurate detection of the wind pressure switch is ensured, and the normal operation of heating equipment is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water equipment, in particular to a pressure-taking pipe and gas hot water equipment. Background Art

[0002] At present, gas hot water equipment such as forced-draft wall-mounted boilers and forced-draft gas water heaters usually use a pressure pipe to connect the positive pressure end of the venturi tube of the fan and the wind pressure switch during use to detect whether the operation of the fan is normal. The high-temperature flue gas generated by combustion will enter the pressure pipe through the positive pressure end of the venturi tube. In a low-temperature environment, the high-temperature flue gas will cool down rapidly after passing through the pressure pipe and easily condense into condensed water in the pressure pipe. If the condensed water cannot be discharged or evaporated in time, it may block the pressure pipe when it accumulates to a certain extent, resulting in inaccurate wind pressure detection.

[0003] When the wind pressure switch cannot correctly sense the pressure changes of the fan, it may mistakenly judge that the wind pressure is insufficient and cut off the air supply or stop combustion, causing the equipment to stall or fail to operate normally. Utility Model Content

[0004] In view of this, the utility model provides a pressure pipe and a gas water heater to solve the problem that the gas water heater is shut down or cannot operate normally due to the pressure pipe being blocked because the pressure pipe cannot discharge condensed water.

[0005] In a first aspect, the utility model provides a pressure-taking pipe, which is applied to a gas water heater. The pressure-taking pipe comprises:

[0006] The tube body is provided with a receiving cavity; a partition is provided in the receiving cavity of the tube body, the partition is provided with a drainage port, and the partition divides the receiving cavity into a first cavity and a second cavity; the tube body is provided with a drainage end, a first connecting end for connecting to the positive pressure end of the venturi tube, and a second connecting end for connecting to the wind pressure switch, the first connecting end and the second connecting end are respectively communicated with the first cavity;

[0007] The switch valve mechanism includes a reset member and a sealing member, wherein the reset member is adapted to apply a thrust toward the drain port to the sealing member so that the sealing member abuts against the partition and seals the drain port.

[0008] Beneficial effect: When in use, the first connection end is connected to the positive pressure end of the Venturi tube, and the second connection end is connected to the wind pressure switch. The high-temperature flue gas passes through the positive pressure end of the Venturi tube and the first cavity in turn, and finally flows into the wind pressure switch. After the flue gas is cooled in the first cavity, it condenses into condensed water and gathers in the first cavity. As the condensed water gathers in the first cavity, when the overall gravity of the condensed water and the seal is greater than the thrust of the reset member, the drain port is converted to an open state, and the seal is separated from the drain port. At this time, the condensed water is discharged from the drain port; when the overall gravity of the remaining condensed water and the seal is less than the thrust of the reset member, the seal is re-contacted and sealed with the drain port on the partition under the thrust of the reset member, so that the drain port is closed again. The drain port and the seal are arranged at the bottom of the first cavity, and the state of the seal is automatically controlled by using the gravity of the condensed water and the thrust of the reset member. When there is a lot of condensed water inside the pressure taking pipe, the drain port can be automatically opened to discharge the condensed water, ensuring accurate detection of the wind pressure switch, and then ensuring the normal operation of the equipment.

[0009] In an optional embodiment, the switch valve mechanism includes:

[0010] A shell is fixed in the second cavity; the shell is sealed and connected to the tube body; the interior of the shell is a hollow structure, and the partition is provided at one end of the shell;

[0011] The reset member is a spring member, one end of which is connected to the sealing member, and the other end of which is fixed in the housing or in the tube body.

[0012] Beneficial effect: The embodiment of the utility model provides a spring member, and when the condensed water reaches a certain amount, the elastic force of the spring member cannot overcome the gravity of the condensed water, so that the sealing member moves from the first position to the second position under the action of gravity, so that the condensed water can be discharged, ensuring the accurate detection of the wind pressure switch, and further ensuring the normal operation of the heating device. Furthermore, after a certain amount of condensed water is discharged, or after it is completely discharged, the sealing member can move from the second position to the first position under the action of the elastic force of the spring member, so that the condensed water can be received again. In addition, no electrical control equipment is required to operate the operation of the switch valve mechanism, which can reduce production costs to a certain extent, and the pure mechanical structure can also ensure the normal operation of the switch valve mechanism.

[0013] In an optional embodiment, the outer side wall of the shell and the inner side wall of the drainage end are sealed by a threaded connection.

[0014] Beneficial effect: The embodiment of the utility model connects the shell and the tube body by threads, which does not require additional sealing equipment compared to other sealing methods, and the sealing performance of the threaded seal is also better, thereby ensuring the normal operation of the pressure taking tube.

[0015] In an optional embodiment, the shell is in a stepped shaft structure, the small end of the shell is smaller than the inner diameter of the tube body, and the large end of the shell is larger than the inner diameter of the tube body.

[0016] Beneficial effect: The embodiment of the utility model can prevent the shell from being screwed in too large during the screwing process by setting the shell as a stepped shaft structure, which is not conducive to later maintenance and replacement, thereby increasing the service life of the structural parts. At the same time, the technician can use the large end of the shell as the operating end to install the shell, which is convenient for the technician to install.

[0017] In an optional implementation, the switch valve mechanism further includes:

[0018] An adjusting component is fixed in the housing; a driving end of the adjusting component is connected to the other end of the sealing member so that the other end of the sealing member is fixed in the housing;

[0019] Under the action of external force, the driving end of the adjustment component has a first state close to the sealing member and a second state away from the sealing member.

[0020] Beneficial effect: The embodiment of the utility model can adjust the movement stroke of the spring member according to the actual flow rate of condensed water by setting an adjustment component, so as to adjust the elastic force of the spring member, thereby controlling the switching timing of the switching valve mechanism, which is convenient for technicians to operate flexibly.

[0021] In an optional embodiment, the adjustment component includes:

[0022] A distance adjusting plate, arranged in the housing;

[0023] A push rod is movably arranged on the distance adjusting plate; after one end of the push rod extends into the housing, it is fixed to the other end of the spring member.

[0024] Beneficial effect: By setting a push rod and a distance adjustment plate, the embodiment of the utility model allows technicians to directly adjust the elastic force of the spring member by adjusting the length of the push rod inserted into the shell, thereby controlling the switching timing of the switch valve mechanism, which is convenient for technicians to operate flexibly.

[0025] In an optional embodiment, a through hole is provided on the distance adjusting plate, and the push rod extends into the housing after being inserted into the through hole; and the outer wall of the push rod is connected to the thread.

[0026] Beneficial effect: By setting external threads on the outer wall of the push rod and internal threads in the through hole, the technician can adjust the elastic force of the spring member by screwing the length of the push rod inserted into the housing, thereby controlling the switching timing of the switch valve mechanism. Compared with directly plugging and unplugging the push rod, the setting of the threads can more accurately control the insertion length of the push rod, further improving the accuracy of the adjustment amount.

[0027] In an optional embodiment, a limit plate is provided at one end of the push rod away from the distance adjusting plate.

[0028] Beneficial effect: The embodiment of the utility model can adjust the position of the limit plate according to the actual elastic force of the spring part by setting a limit plate. The limit plate can limit the insertion stroke of the push rod, thereby limiting the deformation compression amount of the spring part, and further preventing the elastic force of the spring part from being too large due to the insertion stroke of the push rod being too long, thereby ensuring that the condensed water can be discharged normally.

[0029] In an optional embodiment, the outer peripheral edge of the distance adjusting plate is connected to the shell via a plurality of supporting ribs, and the push rod has a hollow structure.

[0030] Beneficial effect: The embodiment of the utility model is provided with a plurality of support ribs, and when the condensed water is discharged, the condensed water can fall from the gap between two adjacent support ribs, thereby ensuring that the condensed water can be discharged normally. In addition, the push rod is provided with a hollow structure, so that when the amount of condensed water is large, part of the condensed water can be directly discharged from the push rod, forming a double insurance with the normal drainage channel, further ensuring that the condensed water can be discharged normally.

[0031] In an optional embodiment, the inner diameter of the spring member gradually increases from one end close to the sealing member to the other end close to the adjustment assembly.

[0032] Beneficial effect: The embodiment of the utility model adjusts the inner diameter of the spring member to a gradual structure, which is beneficial to the stability of the spring member when moving. In addition, compared with the spring member with a cylindrical structure, when the spring member in this embodiment is compressed, the small end can be directly compressed into the large end, rather than directly stacked and abutted, so that a larger compression stroke can be achieved within the same installation space.

[0033] In an optional embodiment, the sealing member is provided with a boss structure on the end near the spring member, and the boss structure is suitable for being inserted into the small head end of the spring member; the push rod is provided with a fixing groove at the end near the spring member, and the large head end of the spring member is fixed in the fixing groove.

[0034] Beneficial effects: The embodiment of the utility model can ensure better cooperation between the seal and the spring by setting a boss mechanism, so that the spring cannot fall out of the boss mechanism. At the same time, no additional fixing parts are required to fix the spring, so that it is convenient for technicians to replace the spring. The embodiment of the utility model can stably fix the big end of the spring in the fixing groove by setting a fixing groove, preventing the relative position deviation of the spring when it moves under pressure, and ensuring the normal operation of the switch valve mechanism.

[0035] In a second aspect, the utility model further provides a gas water heater, which comprises: a pressure taking pipe as described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 This is a front view of a pressure-taking tube according to an embodiment of the utility model;

[0038] Figure 2 for Figure 1 A cross-sectional view of the pressure taking pipe shown;

[0039] Figure 3 for Figure 2 A partial enlarged schematic diagram of

[0040] Figure 4 for Figure 1 Bottom view shown.

[0041] Description of reference numerals:

[0042] 1. Pipe body; 11. Drain end; 12. First connection end; 13. Second connection end; 2. Switch valve mechanism; 21. Shell; 211. Drain port; 22. Sealing member; 23. Spring member; 24. Adjustment assembly; 241. Distance adjustment plate; 242. Push rod; 243. Limiting plate; 244. Support rib; 3. Partition; 4. First cavity; 5. Second cavity. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0045] According to an embodiment of the present utility model, on one hand, a pressure taking tube is provided, which includes a tube body 1 and a switch valve mechanism 2 .

[0046] Specifically, in this embodiment, the tube body 1 is provided with a receiving cavity, a partition 3 is provided in the receiving cavity of the tube body 1, the partition 3 is provided with a drain port 211, and the partition 3 divides the receiving cavity into a first cavity 4 and a second cavity 5. The tube body 1 is provided with a drain end 11, a first connecting end 12 and a second connecting end 13, the first connecting end 12 is used to connect to the positive pressure end of the venturi tube, the second connecting end 13 is used to connect to the wind pressure switch, and the first connecting end 12 and the second connecting end 13 are respectively connected to the first cavity 4.

[0047] Furthermore, in this embodiment, the switch valve mechanism 2 is arranged in the second cavity 5, and the switch valve mechanism 2 includes a reset member and a sealing member 22, one end of the reset member is fixed in the second cavity 5, and the other end of the reset member is connected to the sealing member 22, and the reset member is suitable for applying a thrust toward the drain port 211 to the sealing member 22 so that the sealing member 22 abuts against the partition portion 3 and seals the drain port 211.

[0048] In actual operation, when the switch valve mechanism 2 is in a closed state, that is, the seal 22 abuts against the partition 3, so that the first cavity 4 of the switch valve mechanism 2 is used to receive condensed water. When the switch valve mechanism 2 is in an open state, that is, when the overall gravity of the condensed water and the seal 22 is greater than the thrust of the reset member, the seal 22 is away from the partition 3, so that the interior of the tube body 1 is connected to the outside, and the condensed water is discharged to the outside.

[0049] The actual operation type of the switch valve mechanism 2 can be automatic operation or manual operation. When automatic operation is adopted, the amount of condensed water can be detected by a liquid level detector. When the amount of condensed water is greater than the predetermined liquid level of the liquid level detector, the switch valve mechanism 2 automatically opens. After the discharge, the switch valve mechanism 2 automatically closes. Of course, when manual operation is adopted, the technician can directly observe the amount of condensed water, and then operate the switch valve mechanism 2 to open and close according to the actual situation.

[0050] With such arrangement, when in use, the first connection end 12 is connected to the positive pressure end of the Venturi tube, and the second connection end 13 is connected to the wind pressure switch. The high-temperature flue gas passes through the positive pressure end of the Venturi tube and the first cavity 4 in sequence, and finally flows into the wind pressure switch. After cooling in the first cavity 4, the flue gas condenses into condensed water and gathers in the first cavity 4. As the condensed water gathers in the first cavity 4, when the overall gravity of the condensed water and the seal 22 is greater than the thrust of the reset member, the drain port 211 is converted to an open state, and the seal 22 is separated from the drain port 211. At this time, the condensed water is discharged from the drain port 211; when the overall gravity of the remaining condensed water and the seal 22 is less than the thrust of the reset member, the seal 22 is re-sealed against the drain port 211 on the partition 3 under the thrust of the reset member, so that the drain port 211 is closed again. The drain port 211 and the seal 22 are arranged at the bottom of the first cavity 4, and the state of the seal 22 is automatically controlled by utilizing the gravity of the condensed water and the thrust of the reset member. When there is a lot of condensed water inside the pressure taking pipe, the drain port 211 can be automatically opened to discharge the condensed water, thereby ensuring accurate detection of the wind pressure switch and further ensuring the normal operation of the equipment.

[0051] Further, in an optional embodiment, the switch valve mechanism 2 as a whole includes a housing 21, a sealing member 22 and a spring member 23. Specifically, in this embodiment, the housing 21 is fixed in the second cavity 5, and the housing 21 is sealed and connected to the tube body 1. The sealing method can be a sealing strip, and the sealing strip can be laid between the housing 21 and the tube body 1. The interior of the housing 21 is a hollow structure, and a drain port 211 is opened on the housing 21.

[0052] Furthermore, in this embodiment, one end of the spring member 23 is connected to the sealing member 22 , and the other end of the spring member 23 is fixed in the housing 21 or in the tube body 1 .

[0053] Under the combined force of the gravity of the condensed water and the elastic force of the spring member 23, the sealing member 22 moves from the first position to the second position, and from the second position to the first position. When the other end of the spring member 23 is fixed in the housing 21, the spring member 23 is compressed when there is more condensed water, and the spring member 23 rebounds when there is less condensed water. When the other end of the spring member 23 is fixed in the tube body 1, the spring member 23 is stretched when there is more condensed water, and the spring member 23 rebounds when there is less condensed water.

[0054] In this way, the embodiment of the utility model is provided with a spring member 23, and when the condensed water reaches a certain amount, the elastic force of the spring member 23 cannot overcome the gravity of the condensed water, so that the sealing member 22 moves from the first position to the second position under the action of gravity, so that the condensed water can be discharged, ensuring the accurate detection of the wind pressure switch, and further ensuring the normal operation of the heating device. Furthermore, after a certain amount of condensed water is discharged, or after it is completely discharged, the sealing member 22 can move from the second position to the first position under the elastic force of the spring member 23, so that the condensed water can be received again. In addition, no electrical control equipment is required to operate the operation of the switch valve mechanism 2, which can reduce the production cost to a certain extent, and the pure mechanical structure can also ensure the normal operation of the switch valve mechanism 2.

[0055] Furthermore, in an optional embodiment, the outer wall of the housing 21 and the inner wall of the drain end 11 are sealed by threaded connection. For example, an outer thread can be provided on the outer wall of the housing 21, and the drain end 11 can be provided with an inner thread on the inner wall corresponding to the housing 21, and the housing 21 and the drain end 11 are sealed by threaded connection. Of course, this embodiment is only an example of a specific way of threaded connection, but it is not limited to this. Those skilled in the art can make changes according to actual conditions, as long as the same technical effect can be achieved.

[0056] With such arrangement, the embodiment of the utility model connects the shell 21 with the drainage end 11 by threads, and compared with other sealing methods, no additional sealing equipment is required, and the sealing performance of the threaded seal is also better, thereby ensuring the normal operation of the pressure taking pipe.

[0057] Furthermore, in an optional embodiment, the shell 21 is a stepped shaft structure, the small end of the shell 21 is smaller than the inner diameter of the tube body 1, and the large end of the shell 21 is larger than the inner diameter of the tube body 1.

[0058] In this way, the embodiment of the utility model can prevent the shell 21 from being screwed into too large a size during the screwing process by setting the shell 21 as a stepped shaft structure, which is not conducive to later maintenance and replacement, thereby increasing the service life of the structural parts. At the same time, the technician can use the large end of the shell 21 as the operating end to install the shell 21, which is convenient for the technician to install.

[0059] Furthermore, in an optional embodiment, the switch valve mechanism 2 also includes an adjusting component 24, which is fixed in the housing 21, and a driving end of the adjusting component 24 is connected to the other end of the spring member 23, so that the other end of the spring member 23 is fixed in the housing 21.

[0060] The adjusting assembly 24 can be driven automatically or manually. Under the action of external force, the driving end of the adjusting assembly 24 has a first state close to the sealing member 22 and a second state away from the sealing member 22 .

[0061] In this way, the embodiment of the utility model can adjust the movement stroke of the spring member 23 according to the actual flow rate of the condensed water by setting the adjustment component 24, so as to adjust the elastic force of the spring member 23, thereby controlling the switching timing of the switch valve mechanism 2, which is convenient for technicians to operate flexibly.

[0062] Further, in an optional embodiment, the adjustment assembly 24 includes a distance adjusting plate 241 and a push rod 242. Specifically, in this embodiment, the distance adjusting plate 241 is disposed in the housing 21, and the push rod 242 is movably disposed on the distance adjusting plate 241. After one end of the push rod 242 extends into the housing 21, it is fixed to the other end of the spring member 23. The push rod 242 can be operated by a motor or manually.

[0063] In this way, by setting the push rod 242 and the distance adjustment plate 241, the technician can directly adjust the elastic force of the spring member 23 by adjusting the length of the push rod 242 inserted into the shell 21, thereby controlling the switching timing of the switch valve mechanism 2, which is convenient for the technician to operate flexibly.

[0064] Furthermore, in an optional embodiment, a through hole is provided on the pitch adjusting plate 241, and the push rod 242 extends into the housing 21 after being inserted into the through hole, and the outer wall of the push rod 242 is threadedly connected to the through hole. For example, an external thread may be provided on the outer wall of the push rod 242, and an internal thread may be provided in the through hole, so that the push rod 242 is threadedly connected to the pitch adjusting plate 241. Of course, this embodiment is only an example of a specific method of threaded connection, but it is not limited thereto, and those skilled in the art may make changes according to actual conditions, as long as the same technical effect can be achieved.

[0065] In this way, the embodiment of the utility model provides an external thread on the outer wall of the push rod 242 and an internal thread in the through hole, so that the technician can adjust the elastic force of the spring member 23 by screwing the length of the push rod 242 inserted into the housing 21, thereby controlling the switching timing of the switch valve mechanism 2. Compared with directly plugging and unplugging the push rod 242, the setting of the thread can more accurately control the insertion length of the push rod 242, further improving the accuracy of the adjustment amount.

[0066] Furthermore, in an optional implementation, a limiting plate 243 is provided at one end of the push rod 242 away from the distance adjusting plate 241 .

[0067] With such a configuration, the embodiment of the utility model can adjust the position of the limit plate 243 according to the actual elastic force of the spring member 23 by setting the limit plate 243. The limit plate 243 can limit the insertion stroke of the push rod 242, thereby limiting the deformation compression amount of the spring member 23, and further preventing the elastic force of the spring member 23 from being too large due to the insertion stroke of the push rod 242 being too long, thereby ensuring that the condensed water can be discharged normally.

[0068] Furthermore, in an optional embodiment, the outer peripheral edge of the distance adjusting plate 241 is connected to the shell 21 via a plurality of supporting ribs 244, and the push rod 242 is a hollow structure.

[0069] In this way, the embodiment of the utility model is provided with a plurality of support ribs 244, and when the condensed water is discharged, the condensed water can fall from the gap between two adjacent support ribs 244, thereby ensuring that the condensed water can be discharged normally. In addition, the push rod 242 is provided with a hollow structure, so that when the amount of condensed water is large, part of the condensed water can be directly discharged from the push rod 242, forming a double insurance with the normal drainage channel, further ensuring that the condensed water can be discharged normally.

[0070] Further, in an optional implementation, the inner diameter of the spring member 23 gradually increases from one end close to the sealing member 22 to the other end close to the adjustment assembly 24 .

[0071] In this way, the embodiment of the utility model adjusts the inner diameter of the spring member 23 to a gradual structure, which is beneficial to the stability of the spring member 23 when moving. In addition, compared with the spring member 23 with a cylindrical structure, when the spring member 23 in this embodiment is compressed, the small end can be directly compressed into the large end, rather than directly stacked and abutted, so that a larger compression stroke can be achieved within the same installation space.

[0072] Further, in an optional embodiment, the seal 22 is provided with a boss structure at the end close to the spring member 23, and the boss structure is suitable for inserting into the small end of the spring member 23. The boss structure and the small end of the spring member 23 may be interference fit or fixed by a fixing member.

[0073] In this way, the embodiment of the utility model can ensure that the seal 22 and the spring member 23 cooperate better by providing a boss mechanism, so that the spring member 23 cannot fall out of the boss mechanism. At the same time, no additional fixing member is required to fix the spring member 23, so that it is convenient for technicians to replace the spring member 23.

[0074] Further, in an optional embodiment, the push rod 242 is provided with a fixing groove at the end close to the spring member 23, and the large end of the spring member 23 is fixed in the fixing groove.

[0075] In this way, the embodiment of the utility model can stably fix the large end of the spring member 23 in the fixing groove by providing the fixing groove, thereby preventing the spring member 23 from being relatively shifted when moving under pressure, thereby ensuring the normal operation of the switch valve mechanism 2.

[0076] In a second aspect, the utility model further provides a gas water heater, which has a pressure-taking pipe as described in any one of the above embodiments, and the gas water heater can be a wall-mounted boiler.

[0077] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A pressure pipe, used in gas water heater, characterized in that: include: A tube body (1) is provided with a receiving cavity; a partition (3) is provided in the receiving cavity of the tube body (1), the partition (3) is provided with a drainage port (211), and the partition (3) divides the receiving cavity into a first cavity (4) and a second cavity (5); the tube body (1) is provided with a drainage end (11), a first connecting end (12) for connecting to a positive pressure end of a venturi tube, and a second connecting end (13) for connecting to a wind pressure switch, the first connecting end (12) and the second connecting end (13) are respectively connected to the first cavity (4); A switch valve mechanism (2), the switch valve mechanism (2) comprising a reset member and a sealing member (22), the reset member being adapted to apply a thrust force to the sealing member (22) towards the drain port (211) so that the sealing member (22) abuts against the partition (3) and seals the drain port (211).

2. The pressure taking pipe according to claim 1, characterized in that: The switch valve mechanism (2) further comprises: A shell (21) is fixed in the second cavity (5); the shell (21) is sealedly connected to the tube body (1); the interior of the shell (21) is a hollow structure, and one end of the shell (21) is provided with the partition (3); The reset member is a spring member (23), one end of the spring member (23) is connected to the sealing member (22), and the other end of the spring member (23) is fixed in the housing (21) or in the tube body (1).

3. The pressure taking pipe according to claim 2, characterized in that: The outer wall of the housing (21) and the inner wall of the drainage end (11) are sealed via threaded connection.

4. The pressure taking pipe according to claim 2, characterized in that: The shell (21) is in a stepped shaft structure; the small end of the shell (21) is smaller than the inner diameter of the tube body (1), and the large end of the shell (21) is larger than the inner diameter of the tube body (1).

5. The pressure taking pipe according to any one of claims 2 to 4, characterized in that: The switch valve mechanism (2) further comprises: An adjusting component (24) is fixed in the housing (21); a driving end of the adjusting component (24) is connected to the other end of the spring component (23), so that the other end of the spring component (23) is fixed in the housing (21); Under the action of external force, the driving end of the adjustment component (24) has a first state close to the sealing member (22) and a second state away from the sealing member (22).

6. The pressure taking pipe according to claim 5, characterized in that: The adjustment component (24) comprises: A distance adjusting plate (241) is arranged in the housing (21); A push rod (242) is movably arranged on the distance adjusting plate (241); after one end of the push rod (242) extends into the housing (21), it is fixed to the other end of the spring member (23).

7. The pressure taking pipe according to claim 6, characterized in that: The distance adjusting plate (241) is provided with a through hole, and the push rod (242) extends into the housing (21) after being inserted into the through hole; the outer wall of the push rod (242) is threadedly connected to the through hole.

8. The pressure taking pipe according to claim 7, characterized in that: The push rod (242) is provided with a limiting plate (243) at one end away from the distance adjusting plate (241).

9. The pressure taking tube according to claim 6, characterized in that: The outer peripheral edge of the distance adjusting plate (241) is connected to the housing (21) via a plurality of supporting ribs (244), and the push rod (242) is a hollow structure.

10. The pressure taking tube according to claim 6, characterized in that: The inner diameter of the spring component (23) gradually increases from one end close to the sealing component (22) to the other end close to the adjustment assembly (24).

11. The pressure taking tube according to claim 10, characterized in that: The sealing member (22) is provided with a boss structure at an end close to the spring member (23), and the boss structure is suitable for being inserted into the small end of the spring member (23); the push rod (242) is provided with a fixing groove at an end close to the spring member (23), and the large end of the spring member (23) is fixed in the fixing groove.

12. A gas water heater, characterized in that: A pressure taking tube according to any one of claims 1 to 11.

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