Sensor cable protection device for fire chemical industry

Abstract

The utility model discloses a sensor cable protection device for the fire chemical industry. The sensor cable protection device comprises a front-section protection tube and a rear-section protection tube which are sleeved on the outer side of a sensor cable, and a tube connecting body connected between the front-section protection tube and the rear-section protection tube, a rear connector with an external thread is arranged at the front end of the rear-section protective tube; the pipe connecting body comprises a front connecting sleeve, a middle connecting sleeve and an expansion sleeve, wherein the front connecting sleeve and the middle connecting sleeve are connected end to end, and the expansion sleeve is arranged in an inner cavity of the connecting position of the middle connecting sleeve and the front connecting sleeve. The rear end of the front section protection tube penetrates through the inner cavity of the front connecting sleeve and is connected to the outer wall of the annular clamping part of the expansion sleeve in a sleeving mode, the outer wall of the expansion sleeve clamps the rear end of the front section protection tube, and meanwhile the inner wall of the annular clamping part of the expansion sleeve clamps a sensor cable. The protection device provided by the utility model ensures the firm installation of the sensor and the completeness of the cable.

Description

Technical Field

[0001] The utility model relates to a sensor cable protection device for the pyrochemical industry, belonging to the technical field of instrument detection. Background Art

[0002] In the field of cremation chemical industry, sensors are one of the key technologies to control product quality and ensure safe production. With the continuous expansion of the scale of my country's cremation chemical industry, the continuous improvement of refinement rate and the continuous improvement of intelligence level, my country's cremation chemical sensor market has shown a sustained growth trend.

[0003] In the installation process of existing wired sensors, the common installation method of the sensor is to drill a hole at a suitable position on the device body and fix the sensor to the device through a stud; or grind a suitable groove on the device body and fix the sensor to the device through magnetic adsorption. Then connect the sensor line to the cabinet. In explosion-proof scenarios, intrinsically safe sensor cables often need to be equipped with explosion-proof flexible tubes. The bending performance of the explosion-proof flexible tube itself is poor. Due to the limitations of the device's appearance size, sensor installation direction and installation space, it is impossible to ensure that the explosion-proof flexible tube is in a natural state without pulling the sensor, which in turn causes the sensor to loosen or the cable to be damaged, resulting in inaccurate sensor signal acquisition. Utility Model Content

[0004] The utility model aims to solve the problem of sensor line damage or inaccurate sensor signal acquisition caused by pulling the sensor due to the installation of explosion-proof flexible tubes in a sensor installation method commonly used in explosion-proof scenes.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model discloses a sensor cable protection device for the cremation chemical industry, comprising a front section protection tube and a rear section protection tube sleeved on the outside of the sensor cable, and a pipe connection body connected between the front section protection tube and the rear section protection tube;

[0007] The front protection tube is a metal bellows;

[0008] The rear protection tube adopts an explosion-proof flexible tube, and the front end of the rear protection tube is provided with a rear connector with external threads;

[0009] The pipe connection body comprises a front connection sleeve and an intermediate connection sleeve connected end to end, and an expansion sleeve arranged in the inner cavity at the connection between the intermediate connection sleeve and the front connection sleeve;

[0010] The inner wall of the rear end of the front connecting sleeve is processed with a connecting thread;

[0011] The front end outer wall of the intermediate connecting sleeve is processed with a connecting thread that matches the rear end inner wall of the front connecting sleeve, and the rear end inner wall of the intermediate connecting sleeve is processed with an internal thread that matches the rear connecting head;

[0012] The rear section of the expansion sleeve is a connecting section whose outer diameter matches the inner diameter of the intermediate connecting sleeve, and the front section of the expansion sleeve is an annular clamping portion with notches evenly distributed around the circumference, and the outer wall of the annular clamping portion is a truncated cone;

[0013] The rear end of the intermediate connecting sleeve is threadedly fixed to the front end of the rear connecting head, and the rear section of the expansion sleeve is inserted into the front port of the intermediate connecting sleeve; the rear end of the front section protective tube passes through the inner cavity of the front connecting sleeve and is sleeved on the outer wall of the annular clamping part of the expansion sleeve, and the rear end of the front connecting sleeve is threadedly connected to the front end of the intermediate connecting sleeve, so that the outer wall of the annular clamping part of the expansion sleeve clamps the rear end of the front section protective tube, and at the same time, the inner wall of the annular clamping part of the expansion sleeve clamps the sensor cable.

[0014] An elastic ring is arranged between the inner wall of the annular clamping part of the expansion sleeve and the sensor cable to prevent the annular clamping part of the expansion sleeve from damaging the sensor cable.

[0015] Beneficial effects:

[0016] The protective device of the utility model replaces the traditional explosion-proof flexible tube with a new sensor cable protection device composed of a metal bellows, a tube connector and an explosion-proof flexible tube, so that the weight of the cable protection device is reduced and the bending performance is better, so that the sensor cable is in a natural state, the sensor will not be pulled and become loose, and the sensor is ensured to be securely installed and the cable is intact. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural overview diagram of the protection device of the utility model;

[0018] Figure 2 This is a structural split diagram of the protection device of the utility model;

[0019] In the figure, 1-front section protection tube, 2-tube connector, 3-rear section protection tube, 4-front connecting sleeve, 5-elastic ring, 6-expansion sleeve, 7-middle connecting sleeve, 8-rear connecting head. DETAILED DESCRIPTION

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0021] Example

[0022] The utility model discloses a sensor cable protection device for the cremation chemical industry, such as Figure 1 , 2As shown, it includes a front section protection tube 1 and a rear section protection tube 3 which are sleeved on the outside of the sensor cable, and a pipe connection body 2 connected between the front section protection tube 1 and the rear section protection tube 3;

[0023] The front protection tube 1 is a metal bellows;

[0024] The rear protection tube 3 is an explosion-proof flexible tube, and a rear connector 8 with external threads is provided at the front end of the rear protection tube 3;

[0025] The pipe connection body 2 comprises a front connection sleeve 4 and an intermediate connection sleeve 7 connected end to end, and an expansion sleeve 6 arranged in the inner cavity where the intermediate connection sleeve 7 and the front connection sleeve 4 are connected;

[0026] The rear end inner wall of the front connecting sleeve 4 is processed with connecting threads;

[0027] The front end outer wall of the intermediate connecting sleeve 7 is processed with a connecting thread that matches the rear end inner wall of the front connecting sleeve 4, and the rear end inner wall of the intermediate connecting sleeve 7 is processed with an internal thread that matches the rear connector 8;

[0028] The rear section of the expansion sleeve 6 is a connecting section whose outer diameter matches the inner diameter of the intermediate connecting sleeve 7, and the front section of the expansion sleeve 6 is an annular clamping portion with notches evenly distributed around the circumference, and the outer wall of the annular clamping portion is a truncated cone;

[0029] The rear end of the intermediate connecting sleeve 7 is threadedly fixed to the front end of the rear connecting head 8, and the rear section of the expansion sleeve 6 is inserted into the front port of the intermediate connecting sleeve 7; the rear end of the front section protection tube 1 passes through the inner cavity of the front connecting sleeve 4 and is sleeved on the outer wall of the annular clamping part of the expansion sleeve 6, and the rear end of the front connecting sleeve 4 is threadedly connected to the front end of the intermediate connecting sleeve 7, so that the outer wall of the annular clamping part of the expansion sleeve 6 clamps the rear end of the front section protection tube 1, and at the same time, the inner wall of the annular clamping part of the expansion sleeve 6 clamps the sensor cable.

[0030] An elastic ring 5 is arranged between the inner wall of the annular clamping part of the expansion sleeve 6 and the sensor cable to prevent the annular clamping part of the expansion sleeve 6 from causing damage to the sensor cable.

Claims

1. A sensor cable protection device for the cremation chemical industry, characterized by: It includes a front section protection tube and a rear section protection tube which are sleeved on the outside of the sensor cable, and a pipe connection body connected between the front section protection tube and the rear section protection tube; The front end of the rear protection tube is provided with a rear connector with external threads; The pipe connection body comprises a front connection sleeve and an intermediate connection sleeve connected end to end, and an expansion sleeve arranged in the inner cavity at the connection between the intermediate connection sleeve and the front connection sleeve; The inner wall of the rear end of the front connecting sleeve is processed with a connecting thread; The front end outer wall of the intermediate connecting sleeve is processed with a connecting thread that matches the rear end inner wall of the front connecting sleeve, and the rear end inner wall of the intermediate connecting sleeve is processed with an internal thread that matches the rear connecting head; The rear section of the expansion sleeve is a connecting section whose outer diameter matches the inner diameter of the intermediate connecting sleeve, and the front section of the expansion sleeve is an annular clamping portion with notches evenly distributed around the circumference, and the outer wall of the annular clamping portion is a truncated cone; The rear end of the intermediate connecting sleeve is threadedly fixed to the front end of the rear connecting head, and the rear section of the expansion sleeve is inserted into the front port of the intermediate connecting sleeve; the rear end of the front section protective tube passes through the inner cavity of the front connecting sleeve and is sleeved on the outer wall of the annular clamping part of the expansion sleeve, and the rear end of the front connecting sleeve is threadedly connected to the front end of the intermediate connecting sleeve, so that the outer wall of the annular clamping part of the expansion sleeve clamps the rear end of the front section protective tube, and at the same time, the inner wall of the annular clamping part of the expansion sleeve clamps the sensor cable.

2. The sensor cable protection device according to claim 1, characterized in that: The front section protection tube adopts a metal corrugated tube, and the rear section protection tube adopts an explosion-proof flexible tube.

3. The sensor cable protection device according to claim 1 or 2, characterized in that: An elastic ring is arranged between the inner wall of the annular clamping part of the expansion sleeve and the sensor cable.

Images