Single screw pump pressure detection structure

Abstract

The utility model discloses a single screw pump pressure detection structure, including single screw and bush, still include sensor component, the sensor component includes flexible spiral pastes the band, a plurality of pressure sensor and signal ring, a plurality of pressure sensor integration in flexible spiral pastes the inside, and flexible spiral pastes and signal ring inside all distribution has signal transmission circuit, and flexible spiral pastes the signal transmission circuit is electric connection with pressure sensor, and signal ring's signal transmission circuit is electric connection with flexible spiral pastes the signal transmission circuit, the inner wall of bush is opened and contains the spiral groove of flexible spiral pastes, and flexible spiral pastes one part embeds in spiral groove, and another part is connected with signal ring, and signal ring installs in the outer wall of bush, is used for transmitting the signal detected to the outside of bush. The utility model can detect the pressure distribution in spiral cavity comprehensively, not only avoids the complexity of the separate installation and wiring of multiple sensors, but also improves the detection range and sensitivity.

Description

Technical Field

[0001] This utility model relates to the field of pump internal pressure detection technology, and specifically to a pressure detection structure for a single screw pump. Background Technology

[0002] Single screw pumps are widely used in petrochemical, shipbuilding, and energy industries. The stability of the output pressure of a single screw pump directly affects the safety of system operation. Accurate real-time detection of the dynamic pressure field within multiple sealed cavities is the key data foundation for single screw pumps to achieve fault early warning, predictive maintenance, and intelligent operation. Currently, pressure detection of single screw pumps is difficult. Due to limitations in their structure and operating conditions, pressure measurements are usually only performed at the inlet and outlet pipes, making it difficult to accurately reflect the true pressure changes and dynamic distribution characteristics of the medium during its transport within the pump. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to address the problems of difficulty in detecting the internal pressure of a single screw pump and poor signal reliability in the existing technology, and to provide a pressure detection structure for a single screw pump.

[0004] Technical Solution: This utility model discloses a pressure detection structure for a single screw pump, comprising a single screw and a bushing, and a sensor assembly. The sensor assembly includes a flexible spiral tape, multiple pressure sensors, and a signal ring. The multiple pressure sensors are integrated inside the flexible spiral tape. Signal transmission lines are distributed inside both the flexible spiral tape and the signal ring. The signal transmission lines of the flexible spiral tape are electrically connected to the pressure sensors, and the signal transmission lines of the signal ring are electrically connected to the signal transmission lines of the flexible spiral tape. The inner wall of the bushing has a spiral groove to accommodate the flexible spiral tape. A portion of the flexible spiral tape is embedded in the spiral groove, and another portion is connected to the signal ring. The signal ring is installed on the outer wall of the bushing to transmit the detected signal to the outside of the bushing.

[0005] Furthermore, an annular groove is formed at one end of the outer wall of the bushing, and a connecting groove is formed on the end face of the bushing. The connecting groove provides a communication path for the flexible spiral tape to connect from the inner spiral groove to the outer annular groove, and the signal ring is installed in the annular groove.

[0006] Furthermore, multiple pressure sensors are evenly arranged on the flexible spiral tape at intervals of 1 / 8 of the pitch.

[0007] Furthermore, the flexible spiral tape has several mounting holes for mounting the pressure sensor.

[0008] Furthermore, the spiral groove is located at the following positions: on the raised surface of the spiral crest on the inner wall of the bushing and along the spiral direction; and / or on the recessed surface of the spiral trough on the inner wall of the bushing and along the spiral direction.

[0009] Furthermore, the inner wall of the bushing is provided with four spiral grooves, two of which are formed on the raised surface of two continuous spiral peaks on the inner wall of the bushing; the other two spiral grooves are formed on the recessed surface of two continuous spiral valleys on the inner wall of the bushing.

[0010] Furthermore, corresponding to the four spiral grooves, four sets of the sensor assembly bushings are respectively provided with four annular grooves and connecting grooves on their outer walls. Each flexible spiral tape is placed in the corresponding spiral groove and connecting groove and is connected to the corresponding signal ring.

[0011] Furthermore, the pressure sensor is a MEMS piezoresistive pressure sensor.

[0012] Beneficial Effects: The single-screw pump pressure detection structure proposed in this utility model adopts a flexible tape structure, allowing the tape and pressure sensor to fit tightly against the inner wall of the bushing. The spiral portion of the flexible spiral tape 4 adopts a spiral design consistent with the direction of the crests and troughs. This flexible spiral tape structure design matches the movement mode of the sealed chamber, ensuring the stability and reliability of pressure detection during operation. Each tape integrates signal transmission lines and multiple sensors, enabling comprehensive detection of the pressure distribution within the spiral cavity. By embedding the pressure sensor within the flexible spiral tape, the sensor and tape are integrated into a single unit, avoiding the complexity of separate installation and wiring of multiple sensors, and improving the detection range and sensitivity. Attached Figure Description

[0013] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the internal structure of the bushing of this utility model; Figure 4 This is a schematic diagram of the outer annular groove of the bushing; Figure 5 This is an enlarged structural diagram of the bushing end connecting groove; Figure 6 This is a schematic diagram of the overall structure of the flexible spiral tape. Figure 7 This is an enlarged view of the flexible spiral tape structure. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0015] like Figures 1-5 As shown, this utility model proposes a single-screw pump pressure detection structure, including a single screw 1, a bushing 2, and a sensor assembly 3. The sensor assembly 3 includes a flexible spiral tape 4, multiple pressure sensors 5, and a signal ring 6. The multiple pressure sensors 5 are integrated inside the flexible spiral tape 4. Signal transmission lines are distributed inside both the flexible spiral tape 4 and the signal ring 6. The signal transmission lines of the flexible spiral tape 4 are electrically connected to the pressure sensors 5, and the signal transmission lines of the signal ring 6 are electrically connected to the signal transmission lines of the flexible spiral tape 4. The inner wall of the bushing 2 has a spiral groove to accommodate the flexible spiral tape 4. Part of the flexible spiral tape 4 is embedded in the spiral groove, and the other part is connected to the signal ring 6. One end of the outer wall of the bushing 2 has an annular groove 9, and the end face of the bushing 2 has a connecting groove 8. The connecting groove 8 provides a communication path for the flexible spiral tape 4 to connect from the inner spiral groove to the outer annular groove 9. The signal ring 6 is installed in the annular groove 9 on the outer wall of the bushing 2 and is used to transmit the detected signal to the outside of the bushing.

[0016] In one embodiment, the spiral groove is located on the raised surface of the spiral crest on the inner wall of the bushing 2 and along the spiral direction; and / or on the recessed surface of the spiral trough on the inner wall of the bushing 2 and along the spiral direction. In a specific embodiment, such as Figure 3 As shown, the inner wall of the bushing 2 has four spiral grooves. On the raised surface of the two continuous spiral peaks of the inner wall of the bushing 2, the first spiral groove 2.1 and the second spiral groove 2.2 are respectively formed along the spiral direction. On the recessed surface of the two continuous spiral troughs of the inner wall of the bushing 2, the third spiral groove 2.3 and the fourth spiral groove 2.4 are respectively formed along the spiral direction. Four flexible spiral tapes 4 are correspondingly arranged on the four spiral grooves. The spiral part adopts a spiral design consistent with the spiral direction of the peaks and troughs, enabling the flexible spiral tapes 4 to match the movement mode of the sealed chamber, ensuring the stability and reliability of pressure detection during operation.

[0017] In specific implementation methods, such as Figure 4-5 As shown, the annular groove 9 includes a first annular groove 9.1, a second annular groove 9.2, a third annular groove 9.3, and a fourth annular groove 9.4. The flexible spiral tape 4 includes a first flexible spiral tape 4.1, a second flexible spiral tape 4.2, a third flexible spiral tape 4.3, and a fourth flexible spiral tape 4.4. Each flexible spiral tape 4 corresponds to a connecting groove 8, which is formed on the end face of the bushing 2 and extends to the corresponding annular groove, providing a communication path for each flexible spiral tape 4 to connect from the inner spiral groove to the outer annular groove 9.

[0018] Combination Figure 6-7As shown, each flexible spiral tape 4 is divided into two parts: one part is embedded in the spiral groove, and the other part is connected to the signal ring. The structure of the flexible spiral tape 4 embedded in the spiral groove is consistent with the corresponding spiral groove. Each flexible spiral tape 4 has multiple mounting holes 7 evenly spaced at 1 / 8 pitch for mounting the pressure sensor 5. Moreover, the flexible spiral tape 4 has a signal transmission line inside for connecting to the pressure sensor 5. The outer wall of the bushing 2 is provided with a signal ring 6, which includes a first signal ring 6.1, a second signal ring 6.2, a third signal ring 6.3, and a fourth signal ring 6.4. Each signal ring 6 has a transmission line inside for connecting to the flexible spiral tape 4. Each signal ring 6 is placed into the corresponding ring groove 9 according to its position relationship, such as placing ring 6.1 into ring groove 9.1. The flexible spiral tape 4 is also placed in its respective spiral groove and connecting groove and connected to the signal ring 6. For example, the flexible tape 4.1 is placed in the first spiral groove and connecting groove and connected to the ring 6.1. The signal is transmitted to the outside of the bushing for processing through the signal ring 6.

[0019] In a specific implementation, the pressure sensor 5 is a MEMS piezoresistive pressure sensor. Each MEMS piezoresistive pressure sensor is placed into the mounting hole 7 of the flexible spiral tape 4. The signal transmission line in each flexible spiral tape 4 is connected to the MEMS piezoresistive pressure sensor to form an integrated structure of flexible tape and pressure sensor.

Claims

1. A pressure detection structure for a single screw pump, comprising a single screw (1) and a bushing (2), characterized in that, It also includes a sensor assembly (3), which includes a flexible spiral tape (4), multiple pressure sensors (5) and a signal ring (6). The multiple pressure sensors (5) are integrated inside the flexible spiral tape (4). Signal transmission lines are distributed inside both the flexible spiral tape (4) and the signal ring (6). The signal transmission lines of the flexible spiral tape (4) are electrically connected to the pressure sensors (5), and the signal transmission lines of the signal ring (6) are electrically connected to the signal transmission lines of the flexible spiral tape (4). The inner wall of the bushing (2) has a spiral groove to accommodate the flexible spiral tape (4). A part of the flexible spiral tape (4) is embedded in the spiral groove, and the other part is connected to the signal ring (6). The signal ring (6) is installed on the outer wall of the bushing (2) to transmit the detected signal to the outside of the bushing (2).

2. The single-screw pump pressure detection structure according to claim 1, characterized in that, The bushing (2) has an annular groove (9) at one end of its outer wall and a connecting groove (8) at the end face of the bushing (2). The connecting groove (8) provides a connecting path for the flexible spiral tape (4) to connect from the inner spiral groove to the outer annular groove (9). The signal ring (6) is installed in the annular groove (9).

3. The single-screw pump pressure detection structure according to claim 1, characterized in that, Multiple pressure sensors (5) are evenly arranged on the flexible spiral tape (4) at intervals of 1 / 8 pitch.

4. The single-screw pump pressure detection structure according to any one of claims 1-3, characterized in that, The flexible spiral tape (4) has several mounting holes (7) for mounting the pressure sensor (5).

5. The single-screw pump pressure detection structure according to any one of claims 1-3, characterized in that, The spiral grooves are located on the raised surface of the spiral crest on the inner wall of the bushing (2) and along the spiral direction; and / or on the recessed surface of the spiral trough on the inner wall of the bushing (2) and along the spiral direction.

6. The single-screw pump pressure detection structure according to claim 5, characterized in that, The inner wall of the bushing (2) is provided with 4 spiral grooves. Two of the spiral grooves are opened on the raised surface of the two continuous spiral peaks of the inner wall of the bushing (2); the other two spiral grooves are opened on the recessed surface of the two continuous spiral valleys of the inner wall of the bushing (2).

7. The single-screw pump pressure detection structure according to claim 6, characterized in that, The outer wall of the bushing (2) of the sensor assembly (3) is provided with four sets of four spiral grooves respectively. Each flexible spiral tape (4) is placed in the corresponding spiral groove and connecting groove and connected to the corresponding signal ring (6).

8. The single-screw pump pressure detection structure according to any one of claims 1-3, characterized in that, The pressure sensor (5) is a MEMS piezoresistive pressure sensor.

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