A pressure sensor calibration device for intelligent stratified water injection

Abstract

The utility model provides a pressure sensor calibration device for intelligent stratified water injection, including: a pressure inlet joint assembly, a sensor calibration seat assembly, and a sensor assembly. The pressure sensor calibration device for intelligent stratified water injection transmits the liquid in the pressure calibration device to the sensor calibration seat assembly through the pressure inlet joint assembly. The sensor calibration seat assembly and the sensor assembly together form a closed cavity space; thus, multiple pressure sensors installed in the sensor assembly can be directly calibrated simultaneously, avoiding the problem of invalid calibration results after the individual calibration pressure sensors are disassembled. The problem of the prior art that the pressure sensor is disassembled and then installed after the calibration is completed, thereby changing the state of the pressure sensor and causing the calibration result to be invalid, is solved, and the effect of accurately calibrating multiple pressure sensors simultaneously without disassembling the pressure sensors is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor calibration tooling, in particular to a pressure sensor calibration device for intelligent stratified water injection. Background Art

[0002] In modern industry, pressure sensors are widely used in aerospace, automobile, machinery, chemical industry and underground stratified water injection and other fields. Pressure sensor is a very important pressure detection device commonly used in downhole tools. It is a device that senses the specified measured pressure and converts it into a useful electrical signal according to a certain rule to meet the requirements of information transmission, processing, storage, display, recording and control, and has the functions of automatic detection and automatic control.

[0003] However, the conventional pressure sensor calibration tool is to calibrate the pressure sensor separately, remove it from the tool after calibration, and then install it into the sensor assembly mounting seat of the water distributor. This calibration method has the following problems: after calibration, the pressure sensor is removed and then installed again, which will change its state and cause the calibration result to be invalid; calibration outside the water distributor does not take into account the influence of the use environment of the whole equipment, such as the temperature compensation of the water distributor causing deviation in the calibration data result; this single calibration of the pressure sensor is inefficient.

[0004] In summary, how to solve the problem that the calibration result becomes invalid because the pressure sensor state is changed due to the removal and reinstallation of the pressure sensor after the calibration of a single pressure sensor is completed is a problem that needs to be solved. Utility Model Content

[0005] The main purpose of the utility model is to provide a pressure sensor calibration device for intelligent stratified water injection, so as to solve the problem that the state of the pressure sensor is changed due to the removal and reinstallation of the pressure sensor after the calibration, thereby causing the calibration result to be invalid.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a pressure sensor calibration device for intelligent stratified water injection, including: a pressure inlet joint assembly, the pressure inlet joint assembly is a "U"-shaped cavity structure with an opening at the first end, and the second end of the pressure inlet joint assembly is connected to the pressure calibration device through a threaded structure; a sensor calibration seat assembly, the sensor calibration seat assembly is a "U"-shaped cavity structure with an opening at the first end, and the second end of the sensor calibration seat assembly is embeddedly connected to the opening of the first end of the pressure inlet joint assembly through a threaded structure; a sensor assembly, the first end of the sensor assembly is embeddedly connected to the opening of the first end of the sensor calibration seat assembly through a threaded structure; wherein the pressure inlet joint assembly is used to dock with the pressure calibration device to transfer liquid to the sensor calibration seat assembly and form a closed cavity space together with the sensor calibration seat assembly and the sensor assembly, and the sensor assembly is used to output the collected data to a circuit board.

[0007] Further, the pressure inlet joint assembly includes: a pressure inlet joint, a countersunk hole is arranged at the end of the second end of the pressure inlet joint, a first external thread is arranged on the outer circumference of the second end section, an external hexagon is arranged outside the left step shaft of the first external thread section retreat groove, and the first external thread is connected to the internal thread of the pressure calibration device; a first sealing ring, and the first sealing ring is installed at the countersunk hole; wherein, the pressure inlet joint

[0008] manual

[0009] The connector is used to be tightly connected to the pressure calibration device to deliver liquid to the sensor calibration seat assembly, and the first sealing ring is used to realize a sealing structure between the pressure inlet connector and the pressure calibration device.

[0010] Furthermore, the interior of the pressure inlet connector is a cavity, and the cavity is composed of three stepped holes arranged in sequence from the first end to the second end. The first stepped hole at the first end has two first annular sealing grooves near the end of the first end, and the second stepped hole is to the right of the middle between the first end and the second end. The inner wall of the third stepped hole is processed with a first internal threaded hole, and a small hole is provided at the bottom of the first internal threaded hole, which is connected with the countersunk hole; wherein, the cavity is used to dock with the sensor calibration seat assembly so as to transfer liquid into the cavity.

[0011] Furthermore, the pressure inlet connector assembly also includes: a third sealing ring, which is installed in the first annular sealing groove; wherein the third sealing ring is used to further seal the enclosed space formed by the pressure inlet connector and the sensor calibration seat assembly.

[0012] Furthermore, the sensor calibration seat assembly includes: a sensor calibration seat, the sensor calibration seat has three shaft sections arranged in order from the first end to the second end, an external hexagon is arranged in the middle of the outer side of the first shaft section, the outer surface of the second shaft section is a cylindrical surface, and the outer circumference of the end of the outer surface of the third shaft section is provided with a second external thread, the second external thread is connected to the first internal thread hole on the inner wall of the third step hole, and the second external thread section has a second annular sealing groove on the left side of the back cutter groove; a second sealing ring, the second sealing ring is installed in the second annular sealing groove; wherein, the sensor calibration seat is connected to the first internal thread hole through the second external thread, and the sensor calibration seat and the pressure inlet joint are connected, and the second sealing ring is used to realize the formation of a reliable sealing structure between the second end of the sensor calibration seat and the inner cavity of the second step hole of the pressure inlet joint.

[0013] Furthermore, the interior of the sensor calibration seat is a cavity structure, and the cavity structure has three sections of calibration seat step holes arranged in order from the first end to the second end. The first calibration seat step hole at the first end is a light hole, and the second calibration seat step hole is to the right of the middle between the first end and the second end. The inner wall of the second calibration seat step hole is processed with a second internal threaded hole, and the third calibration seat step hole is connected to the right end of the sensor calibration seat; wherein, the cavity structure is used to accommodate the sensor assembly and form an enclosed space with the sensor assembly so that liquid can flow into the cavity structure without overflowing.

[0014] Furthermore, a first group of four evenly distributed small holes are circumferentially arranged on the outer wall of the second shaft section near the third shaft section, and the first group of four evenly distributed small holes are connected with the second calibration seat step hole, and a second group of four evenly distributed small holes are circumferentially arranged on the outer wall of the first shaft section near the second shaft section, and the second group of four evenly distributed small holes are connected with the first calibration seat step hole; wherein, the first group of four evenly distributed small holes are used to divert the liquid delivered by the pressure inlet joint through the first group of four evenly distributed small holes, and then flow through the inner cavity formed by the first step hole and the third shaft section, and then flow through the second group of four evenly distributed small holes until the liquid fills the entire cavity structure.

[0015] Furthermore, the sensor assembly includes: a sensor mounting seat, a third external thread is provided at the outer diameter of the second end of the sensor mounting seat, and the third external thread is connected to the second internal thread hole. There are two third annular sealing grooves in the middle of the sensor mounting seat; a pressure sensor, the pressure sensor is installed on the sensor mounting seat, and the pressure sensor includes: a first sensor, which is installed at the second end section of the sensor mounting seat, and the second sensor and the third sensor are installed on the sensor mounting seat in sequence; a fourth sealing ring, which is installed at the third annular sealing groove; wherein the sensor mounting seat is used to install the pressure sensor, and the part where the pressure sensor is installed is placed in the sensor mounting seat and the sensor calibration seat to form a closed space, and the fourth sealing ring is used to realize the formation of a reliable sealing structure between the sensor assembly as a whole and the first calibration seat step hole of the sensor calibration seat assembly.

[0016] Furthermore, an outer hexagonal shape is arranged on the outside of the sensor mounting seat.

[0017] manual

[0018] A pressure sensor calibration device for intelligent stratified water injection using the technical solution of the utility model comprises: a pressure inlet joint assembly, a sensor calibration seat assembly, and a sensor assembly. The pressure inlet joint assembly is a "U"-shaped cavity structure with an opening at the first end, and the second end of the pressure inlet joint assembly is connected to the pressure calibration device through a threaded structure; the sensor calibration seat assembly is a "U"-shaped cavity structure with an opening at the first end, and the second end of the sensor calibration seat assembly is embeddedly connected to the first end opening of the pressure inlet joint assembly through a threaded structure; the first end of the sensor assembly is embeddedly connected to the first end opening of the sensor calibration seat assembly through a threaded structure; wherein the pressure inlet joint assembly is used to dock with the pressure calibration device to transfer liquid to the sensor calibration seat assembly and form a closed cavity space with the sensor calibration seat assembly and the sensor assembly, and the sensor assembly is used to output the collected data to the circuit board. Thus, multiple pressure sensors installed in the sensor assembly can be calibrated simultaneously directly, avoiding the problem of invalidation of the calibration result caused by the removal of the pressure sensor after the calibration is completed. The problem of invalidation of the calibration result caused by the removal and reinstallation of the pressure sensor after the calibration is completed in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of a pressure sensor calibration device for intelligent stratified water injection that can be selected according to an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of a pressure inlet joint of a pressure sensor calibration device for intelligent stratified water injection, which can be selected according to an embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of a sensor calibration seat of a pressure sensor calibration device for intelligent stratified water injection that can be selected according to an embodiment of the utility model.

[0023] The above drawings include the following reference numerals:

[0024] 10. Inlet pressure connector assembly; 11. Inlet pressure connector; 12. First sealing ring; 13. Third sealing ring; 20. Sensor calibration seat assembly; 21. Sensor calibration seat; 22. Second sealing ring; 30. Sensor assembly; 31. Sensor mounting seat; 32. Pressure sensor; 321. First sensor; 322. Second sensor; 323. Third sensor; 33. Fourth sealing ring. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] According to the utility model, a pressure sensor calibration device for intelligent stratified water injection is provided, such as Figure 1 As shown, it includes: a pressure inlet joint assembly 10, a sensor calibration seat assembly 20, and a sensor assembly 30. The pressure inlet joint assembly 10 is a "U"-shaped cavity structure with an opening at the first end, and the second end of the pressure inlet joint assembly 10 is connected to the pressure calibration device through a threaded structure; the sensor calibration seat assembly 20 is a "U"-shaped cavity structure with an opening at the first end, and the second end of the sensor calibration seat assembly 20 is embedded in the opening of the first end of the pressure inlet joint assembly 10 through a threaded structure; the first end of the sensor assembly 30 is embedded in the opening of the first end of the sensor calibration seat assembly 20 through a threaded structure; wherein the pressure inlet joint assembly 10 is used to connect to the pressure calibration device

[0027] manual

[0028] The device is docked to transfer the liquid to the sensor calibration seat assembly 20 and form a closed cavity space with the sensor calibration seat assembly 20 and the sensor assembly 30. The sensor assembly 30 is used to output the collected data to the circuit board. It can be understood that when using the intelligent stratified water injection pressure sensor calibration device for calibration, by installing the sensor assembly 30 into the cavity of the sensor calibration seat assembly 20, and at the same time installing the sensor calibration seat assembly 20 into the cavity of the inlet and pressure joint assembly 10, the sensor assembly 30 is installed in the closed space formed by the inlet and pressure joint assembly 10, the sensor calibration seat assembly 20 and the sensor assembly 30. The inlet and pressure joint assembly 10 is connected to the pressure calibration device through a threaded structure. After passing through the central liquid inlet hole at the second end of the inlet and pressure joint assembly 10, the liquid flows into the sensor calibration seat assembly 20 until the liquid fills the entire internal cavity of the sensor calibration seat assembly 20, thereby realizing the direct simultaneous calibration of multiple pressure sensors installed on the sensor assembly 30, avoiding the problem of invalid calibration results caused by disassembly of a single calibrated pressure sensor. The problem in the prior art that the pressure sensor is disassembled and then installed again after calibration is completed, thereby changing the state of the pressure sensor and causing the calibration result to be invalid, is solved.

[0029] Specifically, Figure 1 As shown, the pressure inlet connector assembly 10 includes: a pressure inlet connector 11, a countersunk hole is arranged at the end of the second end of the pressure inlet connector 11, a first external thread is arranged on the outer circumference of the end section of the second end, an external hexagon is arranged outside the left step shaft of the first external thread section backing groove, and the first external thread is connected with the internal thread of the pressure calibration device; a first sealing ring 12, and the first sealing ring 12 is installed at the countersunk hole; wherein, the pressure inlet connector 11 is used to be tightly connected with the pressure calibration device to transport the liquid to the sensor calibration seat assembly 20, and the first sealing ring 12 is used to realize the formation of a sealing structure between the pressure inlet connector 11 and the pressure calibration device. It can be understood that the pressure inlet connector 11 is tightly connected with the pressure calibration device through the first sealing ring 12 so as to transport the liquid to the inside of the cavity of the pressure inlet connector 11 without leakage.

[0030] Specifically, the interior of the pressure inlet connector 11 is a cavity, such as Figure 2 As shown, the cavity is composed of three stepped holes arranged in sequence from the first end to the second end. The first stepped hole at the first end has two first annular sealing grooves near the end of the first end. The second stepped hole is to the right of the middle between the first end and the second end. The inner wall of the third stepped hole is processed with a first internal threaded hole. A small hole is arranged at the bottom of the first internal threaded hole, and the small hole is connected with the countersunk hole. The cavity is used to dock with the sensor calibration seat assembly 20 so as to transfer the liquid into the cavity. It can be understood that the pressure inlet connector 11 can form a sealed space with a matching device through the first annular sealing groove and the first internal threaded hole in the internal cavity, so that the liquid flowing in from the second end of the pressure inlet connector 11 can pass through the sealed space.

[0031] Specifically, the pressure inlet connector assembly 10 also includes: a third sealing ring 13, which is installed in the first annular sealing groove; wherein the third sealing ring 13 is used to further seal the enclosed space formed by the pressure inlet connector 11 and the sensor calibration seat assembly 20. It can be understood that by installing the third sealing ring 13 in the first annular sealing groove, the enclosed space formed by the pressure inlet connector 11 and the sensor calibration seat assembly 20 can be further sealed.

[0032] Specifically, the sensor calibration seat assembly 20 includes a sensor calibration seat 21 and a second sealing ring 22. The sensor calibration seat 21 has three shaft sections arranged in order from the first end to the second end. An external hexagon is arranged in the middle of the outer side of the first shaft section. The outer surface of the second shaft section is a cylindrical surface. The outer circumference of the end of the outer surface of the third shaft section is provided with a second external thread. The second external thread is connected to the first internal thread hole on the inner wall of the third step hole. The second external thread section has a second annular sealing groove on the left side of the back cutter groove; the second sealing ring 22 is installed in the second annular sealing groove; wherein, the sensor calibration seat 21 is connected to the first internal thread hole through the second external thread, and the sensor calibration seat 21 is connected to the pressure-inlet joint 11. The second sealing ring 22 is used to realize a reliable sealing structure between the second end of the sensor calibration seat 21 and the inner cavity of the second step hole of the pressure-inlet joint 11. It can be understood that the external hexagon is arranged in the middle of the outer side of the first shaft section, which can be used to tightly connect the sensor calibration seat 21 and the pressure-inlet joint assembly 10 through external force. The instruction manual of the third shaft section

[0033] The second external thread is connected to the first internal thread hole on the inner wall of the third step hole, and the second sealing ring 22 is installed in the second annular sealing groove to achieve the effect of forming a reliable sealing structure between the second end of the sensor calibration seat 21 and the inner cavity of the second step hole of the pressure inlet connector 11.

[0034] Specifically, the interior of the sensor calibration seat 21 is a cavity structure, such as Figure 3 As shown, the cavity structure has three sections of calibration seat step holes arranged in order from the first end to the second end. The first calibration seat step hole at the first end is a light hole, and the second calibration seat step hole is on the right side of the middle between the first end and the second end. The inner wall of the second calibration seat step hole is processed with a second internal threaded hole, and the third calibration seat step hole is connected to the right end of the sensor calibration seat 21; wherein, the cavity structure is used to accommodate the sensor assembly 30 and form a closed space with the sensor assembly 30, so that the liquid flows into the cavity structure without overflowing; it can be understood that the sensor calibration seat 21 installs the sensor assembly 30 through the cavity structure and forms a closed space with the sensor assembly 30.

[0035] Specifically, a first group of four evenly distributed small holes are circumferentially arranged on the outer wall of the second shaft section near the third shaft section, and the first group of four evenly distributed small holes are connected with the second calibration seat step hole. A second group of four evenly distributed small holes are circumferentially arranged on the outer wall of the first shaft section near the second shaft section, and the second group of four evenly distributed small holes are connected with the first calibration seat step hole; wherein, the first group of four evenly distributed small holes are used to divert the liquid delivered by the pressure inlet connector 11 through the first group of four evenly distributed small holes, and then flow through the inner cavity formed by the first step hole and the third shaft section, and then flow through the second group of four evenly distributed small holes until the liquid fills the entire cavity structure. It can be understood that the liquid can fill the entire cavity space formed by the pressure inlet connector assembly 10, the sensor calibration seat assembly 20 and the sensor assembly 30 through the first group of four evenly distributed small holes and the second group of four evenly distributed small holes.

[0036] Specifically, the sensor assembly 30 includes: a sensor mounting seat 31, the outer diameter of the second end of the sensor mounting seat 31 is provided with a third external thread, and the third external thread is connected to the second internal thread hole. There are two third annular sealing grooves in the middle of the sensor mounting seat 31; a pressure sensor 32, the pressure sensor 32 is installed on the sensor mounting seat 31, and the pressure sensor 32 includes: a first sensor 321, which is installed at the second end section of the sensor mounting seat 31, a second sensor 322, and a third sensor 323 are installed on the sensor mounting seat 31 in sequence; a fourth sealing ring 33, and the fourth sealing ring 33 is installed in the third annular sealing groove; wherein the sensor mounting seat 31 is used to install the pressure sensor 32, and the part where the pressure sensor 32 is installed is placed in the sensor mounting seat 31 and the sensor calibration seat 21 to form a closed space, and the fourth sealing ring 33 is installed in the sensor calibration seat 21. The sealing ring 33 is used to realize that the sensor assembly 30 as a whole forms a reliable sealing structure with the first calibration seat step hole of the sensor calibration seat assembly 20. It can be understood that by installing the pressure sensor 32 on the sensor mounting seat 31, and placing one end of the pressure sensor 32 installed into the sensor mounting seat 31 and the sensor calibration seat 21 to form a closed space, the fourth sealing ring 33 is used to realize that the sensor assembly 30 as a whole forms a reliable sealing structure with the first calibration seat step hole of the sensor calibration seat assembly 20, thereby achieving the effect of placing the first sensor 321, the second sensor 322 and the third sensor 323 into the sensor calibration seat assembly 20 for calibration.

[0037] Specifically, the sensor mounting seat 31 is provided with an external hexagonal socket on the outside, which is convenient for clamping with a wrench to facilitate installation. It can be understood that the external hexagonal socket provided on the outside of the sensor mounting seat 31 can achieve the effect of convenient installation by clamping with a wrench.

[0038] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressure sensor calibration device for intelligent stratified water injection, characterized in that: include: A pressure inlet joint assembly (10), wherein the pressure inlet joint assembly (10) is a "U"-shaped cavity structure with an opening at a first end, and a second end of the pressure inlet joint assembly (10) is connected to a pressure calibration device via a threaded structure; A sensor calibration seat assembly (20), wherein the sensor calibration seat assembly (20) is a "U"-shaped cavity structure with an opening at the first end, and the second end of the sensor calibration seat assembly (20) is embeddedly connected to the opening at the first end of the pressure inlet joint assembly (10) through a threaded structure; A sensor assembly (30), wherein a first end of the sensor assembly (30) is embeddedly connected to an opening of a first end of the sensor calibration seat assembly (20) through a threaded structure; The pressure inlet connector assembly (10) is used to connect with the pressure calibration device to transfer liquid to the sensor calibration seat assembly (20) and to form a closed cavity space together with the sensor calibration seat assembly (20) and the sensor assembly (30); the sensor assembly (30) is used to output the collected data to a circuit board.

2. The pressure sensor calibration device for intelligent stratified water injection according to claim 1, characterized in that: The pressure inlet connector assembly (10) comprises: A pressure inlet connector (11), wherein a countersunk hole is arranged at the end of the second end of the pressure inlet connector (11), a first external thread is arranged on the outer circumference of the end section of the second end, an external hexagon is arranged outside the left step shaft at the back groove of the first external thread section, and the first external thread is connected to the internal thread of the pressure calibration device; A first sealing ring (12), the first sealing ring (12) being installed at the countersunk hole; The pressure inlet connector (11) is used to be tightly connected to the pressure calibration device to transport liquid to the sensor calibration seat assembly (20), and the first sealing ring (12) is used to realize the formation of a sealing structure between the pressure inlet connector (11) and the pressure calibration device.

3. The pressure sensor calibration device for intelligent stratified water injection according to claim 2, characterized in that: The interior of the pressure inlet joint (11) is a cavity, and the cavity is composed of three stepped holes arranged in order from the first end to the second end. The first stepped hole at the first end has two first annular sealing grooves near the end of the first end. The middle right between the first end and the second end is a second stepped hole. The inner wall of the third stepped hole is processed with a first internal threaded hole. The bottom of the first internal threaded hole is provided with a small hole, and the small hole is connected with the countersunk hole. The cavity is used to dock with the sensor calibration seat assembly (20) so as to transfer liquid into the cavity.

4. According to the pressure sensor calibration device for intelligent stratified water injection according to claim 3, the pressure inlet joint assembly (10) further comprises: A third sealing ring (13), the third sealing ring (13) being installed in the first annular sealing groove; The third sealing ring (13) is used to further seal the closed space formed by the pressure inlet connector (11) and the sensor calibration seat assembly (20).

5. The pressure sensor calibration device for intelligent stratified water injection according to claim 4, characterized in that: The sensor calibration seat assembly (20) comprises: A sensor calibration seat (21), wherein the sensor calibration seat (21) has three shaft sections arranged in order from the first end to the second end, wherein an external hexagon is provided in the middle of the outer portion of the first shaft section, the outer surface of the second shaft section is a cylindrical surface, and a second external thread is provided in the outer circumferential direction of the end of the outer surface of the third shaft section, wherein the second external thread is connected to the first internal thread hole on the inner wall of the third step hole, and a second annular sealing groove is provided on the left side of the backing groove of the second external thread section; A second sealing ring (22), the second sealing ring (22) being installed in the second annular sealing groove; The sensor calibration seat (21) is connected to the first internal thread hole via the second external thread, so as to connect the sensor calibration seat (21) and the pressure inlet connector (11), and the second sealing ring (22) is used to realize a reliable sealing structure between the second end of the sensor calibration seat (21) and the inner cavity of the second step hole of the pressure inlet connector (11).

6. The pressure sensor calibration device for intelligent stratified water injection according to claim 5, characterized in that: The interior of the sensor calibration seat (21) is a cavity structure, and the cavity structure has three sections of calibration seat step holes arranged in order from the first end to the second end, the first calibration seat step hole at the first end is a light hole, the middle right between the first end and the second end is a second calibration seat step hole, the inner wall of the second calibration seat step hole is processed with a second internal threaded hole, and the third calibration seat step hole is connected to the right end of the sensor calibration seat (21); The cavity structure is used to accommodate the sensor component (30) and form a closed space with the sensor component (30).

7. The pressure sensor calibration device for intelligent stratified water injection according to claim 6, characterized in that: A first group of four evenly distributed small holes are arranged on the outer wall of the second shaft section near the third shaft section, and the first group of four evenly distributed small holes are connected with the second calibration seat step hole; a second group of four evenly distributed small holes are arranged on the outer wall of the first shaft section near the second shaft section, and the second group of four evenly distributed small holes are connected with the first calibration seat step hole; The first group of four evenly distributed small holes is used to divert the liquid delivered from the pressure inlet connector (11) through the first group of four evenly distributed small holes, and the second group of four evenly distributed small holes is used to merge the liquid flowing through the first step hole and the third shaft section.

8. The pressure sensor calibration device for intelligent stratified water injection according to claim 7, characterized in that: The sensor assembly (30) comprises: A sensor mounting seat (31), wherein the outer diameter of the second end of the sensor mounting seat (31) is provided with a third external thread, the third external thread is connected to the second internal thread hole, and the middle of the sensor mounting seat (31) has two third annular sealing grooves; A pressure sensor (32), the pressure sensor (32) being mounted on a sensor mounting seat (31), the pressure sensor (32) comprising: a first sensor (321) mounted on a second end section of the sensor mounting seat (31), a second sensor (322) and a third sensor (323) being mounted on the sensor mounting seat (31) in sequence; A fourth sealing ring (33), the fourth sealing ring (33) being installed in the third annular sealing groove; The sensor mounting seat (31) is used to mount the pressure sensor (32), and the portion on which the pressure sensor (32) is mounted is placed into a closed space between the sensor mounting seat (31) and the sensor calibration seat (21), and the fourth sealing ring (33) is used to realize a reliable sealing structure between the sensor assembly (30) as a whole, the sensor calibration seat assembly (20) and the first calibration seat step hole.

9. The pressure sensor calibration device for intelligent stratified water injection according to claim 8, characterized in that: The sensor mounting seat (31) is provided with an outer hexagonal shape on the outside.

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