Pressure-resistant coil framework structure of displacement sensor

Abstract

The utility model discloses a pressure-resistant coil framework structure of a displacement sensor, which comprises a pressure-resistant pipe, a first sealing head and a second sealing head, and the first sealing head and the second sealing head are respectively arranged on the outer sides of the two end parts of the pressure-resistant pipe. The two ends of the pressure-resistant pipe coaxially penetrate into the first sealing head and the second sealing head respectively; outer threads are arranged on the outer sides of the two ends of the pressure-resistant pipe, the two ends of the pressure-resistant pipe are in threaded connection with the first sealing head and the second sealing head through the two sets of outer threads, and two sets of annular mounting grooves are coaxially formed in the outer side of the second sealing head. The utility model has the beneficial effects that the functions of the pressure-resistant pipe and the framework are integrated, the pressure-resistant pipe and the framework are not independently arranged for splicing, and the pressure-resistant pipe is of a through hole structure and is processed by using a pipe material, so that the processing amount of parts is reduced, and the processing difficulty and the processing cost are reduced; and a sealing ring is arranged in the mounting groove to serve as a sealing structure, an original welding sealing structure is replaced, and the mounting difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of displacement sensor equipment, in particular to a pressure-resistant coil skeleton structure of a displacement sensor. Background Art

[0002] Displacement sensors are used to detect the displacement of various devices. For specific high-pressure oil environments, the coil skeleton needs to be able to withstand a certain oil pressure. The displacement sensor works in high-pressure oil, and the external actuator drives the core connecting rod assembly in the displacement sensor to move in the pressure tube. The pressure tube is required to withstand a pressure of up to 35MPa and needs to be completely sealed to protect the internal coil assembly of the displacement sensor. Typical displacement sensors have a split pressure tube and coil skeleton structure, which requires the pressure tube and coil skeleton to have high cylindricity and coaxiality, or the pressure tube and coil skeleton are integrally processed as a pressure-resistant support structure, but both solutions have the problems of difficult processing and high cost. Utility Model Content

[0003] The purpose of the utility model is to provide a pressure-resistant coil skeleton structure for a displacement sensor in order to solve the above-mentioned problem. The pressure-resistant tube also serves as a support frame for the winding, and has the functions of pressure resistance and winding support, thereby simplifying the processing method and reducing the production cost. Details are described below.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides a pressure-resistant coil skeleton structure of a displacement sensor, comprising a pressure-resistant tube and a first sealing head and a second sealing head, wherein the first sealing head and the second sealing head are respectively arranged outside the two ends of the pressure-resistant tube, and the two ends of the pressure-resistant tube are respectively coaxially inserted into the first sealing head and the second sealing head;

[0006] External threads are arranged on the outer sides of both ends of the pressure-resistant tube, and the two ends of the pressure-resistant tube are threadedly connected to the first sealing head and the second sealing head through two groups of external threads, and two groups of annular mounting grooves are coaxially arranged on the outer side of the second sealing head.

[0007] The pressure-resistant coil skeleton structure of the above-mentioned displacement sensor is adopted, and the pressure-resistant tube is used as a supporting frame for the winding at the same time, so as to realize the pressure-resistant and winding supporting functions at the same time, and external threads are arranged on the outer sides of both ends of the pressure-resistant tube to connect the first sealing head and the second sealing head, and potting holes connected to the sealant filling groove are arranged on the outer ends of the two groups of sealing heads, and high-temperature resistant sealant is injected into the sealant filling groove along the potting holes, and two groups of potting parts are formed after the high-temperature resistant sealant is cooled and solidified, and the two groups of sealing heads are respectively bonded and fixed to the outer sides of the ends of the pressure-resistant tube by using the two groups of potting parts, and the positions of the two ends of the pressure-resistant tube are fixed by the external threads and the high-temperature resistant sealant; and an installation groove for accommodating a sealing ring is arranged on the outer side of the second sealing head, so that the sealing ring is conveniently installed in the installation groove after the core connecting rod of the displacement sensor is extended into the pressure-resistant tube, thereby improving the sealing effect of the matching position between the second sealing head and the displacement sensor housing.

[0008] Preferably, a first potting portion for bonding and fixing the outer circumferential side of the pressure-resistant tube is provided inside the first sealing head, and a first annular filling groove for accommodating the first potting portion is provided inside the first sealing head.

[0009] Preferably, two groups of first potting holes are symmetrically arranged at the upper and lower outer end of the first sealing head, the first potting holes extend laterally and are connected to the first filling groove to inject glue into the first filling groove to form the first potting part, the first sealing head is a cover-like structure with one end open and the other end closed, and the first sealing head is tightly and sealed against one end of the pressure-resistant tube.

[0010] Preferably, the second sealing head is a transversely penetrating cylindrical structure, and a second potting portion is provided inside the second sealing head for bonding and fixing the outer circumferential side of the pressure-resistant tube.

[0011] Preferably, two groups of second filling grooves for accommodating high-temperature sealant that solidifies to form a second potting portion are provided inside the second sealing head.

[0012] Preferably, second potting holes are transversely penetrated through the inner walls of the second sealing heads on the inner sides of the two groups of the second filling grooves, and the outer end openings of the second potting holes are flush with the end faces of the second sealing heads.

[0013] Preferably, the number of the second potting holes is two groups, and the two groups of the second potting holes are symmetrically arranged on the inner wall of the second sealing head on the upper and lower sides of the pressure-resistant tube.

[0014] The beneficial effects are as follows: the utility model integrates the functions of the pressure-resistant tube and the frame, and no longer separately sets the pressure-resistant tube and the frame for assembly. The pressure-resistant tube is a through-hole structure and is processed using pipe materials, which reduces the amount of parts processing, and reduces the processing difficulty and cost;

[0015] The sealing ring is installed in the installation groove as the sealing structure, replacing the original welding sealing structure, which reduces the difficulty of installation;

[0016] In addition, the use of a tubular pressure-resistant tube as a pressure-resistant skeleton structure can meet the requirements of a high-pressure working environment, has good sealing performance, and is easy to process, thereby improving manufacturing efficiency and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is the main structural diagram of the utility model;

[0019] Figure 2 It is a front cross-sectional view of the utility model;

[0020] Figure 3 It is a partial structural cross-sectional view of the utility model;

[0021] Figure 4 It is a left-side structural diagram of the utility model;

[0022] Figure 5 It is a right view structural diagram of the utility model.

[0023] The following are the descriptions of the reference numerals:

[0024] 1. Pressure-resistant tube; 101. External thread; 2. First sealing head; 201. First potting hole; 202. First filling groove; 3. Second sealing head; 301. Installation groove; 302. Second potting hole; 303. Second filling groove; 4. First potting part; 5. Second potting part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0026] See also Figure 1-Figure 5As shown, the utility model provides a pressure-resistant coil skeleton structure of a displacement sensor, comprising a pressure-resistant tube 1 and a first sealing head 2 and a second sealing head 3. The first sealing head 2 and the second sealing head 3 are respectively arranged outside the two ends of the pressure-resistant tube 1 as sealing connectors at the ends of the pressure-resistant tube 1, and the two ends of the pressure-resistant tube 1 are respectively coaxially inserted into the first sealing head 2 and the second sealing head 3;

[0027] External threads 101 are provided on the outer sides of both ends of the pressure-resistant tube 1, and the two ends of the pressure-resistant tube 1 are threadedly connected to the first sealing head 2 and the second sealing head 3 through two groups of external threads 101. Two groups of annular mounting grooves 301 are coaxially provided on the outer side of the second sealing head 3. The mounting grooves 301 are used to sleeve sealing rings to improve the sealing performance of the sleeve connection position between the second sealing head 3 and the displacement sensor housing during subsequent use.

[0028] As an optional embodiment, a first potting portion 4 for bonding and fixing the outer circumferential side of the pressure-resistant tube 1 is provided inside the first sealing head 2, and an annular first filling groove 202 for accommodating the first potting portion 4 is provided inside the first sealing head 2. Two groups of first potting holes 201 are symmetrically provided at the upper and lower ends of the outer end of the first sealing head 2. The first potting holes 201 extend laterally and are connected to the first filling groove 202, so as to pour high-temperature sealant into the first filling groove 202, and the first potting portion 4 is formed after the high-temperature sealant is cured. The first sealing head 2 is a cap-like structure with one end open and the other end closed, and the first sealing head 2 is tightly and sealedly arranged on one end of the pressure-resistant tube 1, ensuring that the first sealing head 2 can seal the opening at one end of the pressure-resistant tube 1;

[0029] The second sealing head 3 is a cylindrical structure that is transversely connected. A second potting portion 5 is provided inside the second sealing head 3 to bond and fix the outer circumference of the pressure-resistant tube 1. Two sets of second filling grooves 303 are provided inside the second sealing head 3 to accommodate high-temperature sealant that is cured to form the second potting portion 5.

[0030] The inner wall of the second sealing head 3 inside the two sets of second filling grooves 303 is laterally penetrated with a second potting hole 302, and the outer end opening of the second potting hole 302 is flush with the end surface of the second sealing head 3, so as to facilitate pouring high-temperature sealant into the second potting hole 302 to solidify in the second filling groove 303 to form a second potting part 5, thereby bonding and fixing the pressure-resistant tube 1 and the second sealing head 3;

[0031] There are two groups of second potting holes 302, and the two groups of second potting holes 302 are symmetrically arranged on the inner walls of the second sealing head 3 on the upper and lower sides of the pressure-resistant tube 1. The two groups of second potting holes 302 on the upper and lower sides are connected by two groups of second filling grooves 303 to facilitate the injection of glue from the lower potting holes. When glue comes out of the upper potting holes, it means that the potting holes and the filling grooves are filled with high-temperature sealant.

[0032] By adopting the above structure, the pressure-resistant tube 1 is used as a support frame for the winding at the same time, and the pressure-resistant and winding-supporting functions are realized at the same time. External threads 101 are arranged on the outer sides of both ends of the pressure-resistant tube 1 to connect the first sealing head 2 and the second sealing head 3, and potting holes connected to the sealant filling groove are arranged at the outer ends of the two groups of sealing heads. High-temperature resistant sealant is injected into the sealant filling groove along the potting holes. After the high-temperature resistant sealant is cooled and solidified, two groups of potting parts are formed. The two groups of sealing heads are respectively bonded and fixed to the outer sides of the ends of the pressure-resistant tube 1 by using the two groups of potting parts, and the positions of the two ends of the pressure-resistant tube 1 are fixed by the external threads 101 and the high-temperature resistant sealant; and an installation groove 301 for accommodating a sealing ring is arranged on the outer side of the second sealing head 3, so that the sealing ring is conveniently sleeved into the installation groove 301 after the core connecting rod of the displacement sensor is extended into the pressure-resistant tube 1, thereby improving the sealing effect of the matching position between the second sealing head 3 and the displacement sensor housing;

[0033] By integrating the functions of the pressure-resistant tube 1 and the frame, the pressure-resistant tube 1 and the frame are no longer separately provided for assembly. The pressure-resistant tube 1 is a through-hole structure and is processed using pipe materials, which reduces the amount of parts processing, and reduces the processing difficulty and cost;

[0034] The sealing ring is installed in the installation groove 301 as a sealing structure to replace the original welding sealing structure, thereby reducing the difficulty of installation;

[0035] In addition, the tubular pressure-resistant tube 1 is used as a pressure-resistant skeleton structure to meet the high-pressure working environment, has good sealing performance, and is easy to process, thereby improving manufacturing efficiency and reducing manufacturing costs.

[0036] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A pressure-resistant coil skeleton structure of a displacement sensor, characterized in that: It comprises a pressure-resistant tube (1), a first sealing head (2) and a second sealing head (3), wherein the first sealing head (2) and the second sealing head (3) are respectively arranged on the outside of the two ends of the pressure-resistant tube (1), and the two ends of the pressure-resistant tube (1) are respectively coaxially inserted into the first sealing head (2) and the second sealing head (3); External threads (101) are provided on the outer sides of both ends of the pressure-resistant tube (1), and the two ends of the pressure-resistant tube (1) are threadedly connected to the first sealing head (2) and the second sealing head (3) via two groups of external threads (101), and the outer side of the second sealing head (3) is coaxially provided with two groups of annular mounting grooves (301).

2. The pressure-resistant coil skeleton structure of a displacement sensor according to claim 1, characterized in that: A first potting portion (4) for bonding and fixing the outer circumferential side of the pressure-resistant tube (1) is arranged inside the first sealing head (2), and a first annular filling groove (202) for accommodating the first potting portion (4) is arranged inside the first sealing head (2).

3. The pressure-resistant coil skeleton structure of a displacement sensor according to claim 2, characterized in that: Two groups of first potting holes (201) are symmetrically arranged at the upper and lower ends of the outer end of the first sealing head (2); the first potting holes (201) extend laterally and are connected to the first filling groove (202) so as to inject glue into the first filling groove (202) to form the first potting part (4); the first sealing head (2) is a cover-like structure with one end open and the other end closed, and the first sealing head (2) is tightly and sealedly arranged on one end of the pressure-resistant tube (1).

4. The pressure-resistant coil skeleton structure of a displacement sensor according to claim 3, characterized in that: The second sealing head (3) is a transversely penetrating cylindrical structure, and a second potting portion (5) is provided inside the second sealing head (3) for bonding and fixing the outer circumferential side of the pressure-resistant tube (1).

5. The pressure-resistant coil skeleton structure of a displacement sensor according to claim 4, characterized in that: The second sealing head (3) is provided with two sets of second filling grooves (303) for accommodating high-temperature sealant that solidifies to form a second potting portion (5).

6. The pressure-resistant coil skeleton structure of a displacement sensor according to claim 5, characterized in that: A second potting hole (302) is laterally penetrated through the inner wall of the second sealing head (3) inside the two groups of the second filling grooves (303), and the outer end opening of the second potting hole (302) is flush with the end surface of the second sealing head (3).

7. The pressure-resistant coil skeleton structure of a displacement sensor according to claim 6, characterized in that: The number of the second potting holes (302) is two groups, and the two groups of the second potting holes (302) are symmetrically arranged on the inner wall of the second sealing head (3) at the upper and lower sides of the pressure-resistant tube (1).

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