A preliminary alignment device for a conical sealing surface of an import or export nozzle of a fuel oil radiator

Abstract

The utility model discloses a kind of initial calibration type devices of import and export nozzle inner cone sealing surface of fuel oil radiator, including pull rod, expansion block, press block and sleeve nut.Pull rod contains an outer taper surface Y, expansion block contains coaxial outer taper surface M, inner taper surface H, outer cylindrical surface A and inner taper surface N, press block contains outer taper surface J, and sleeve nut contains the stepped through-hole with partial internal thread.Pull rod is assembled after press block thread and is installed in expansion block and is placed in the stepped through-hole of sleeve nut.When calibration, the inner hole surface ΦA of import and export nozzle is installed corresponding to the outer cylindrical surface A of expansion block, the inner taper sealing surface of import and export nozzle is installed corresponding to the outer taper surface M of expansion block, the outer thread of import and export nozzle is installed corresponding to the internal thread of sleeve nut, centering is realized by outer cylindrical surface A, calibration is carried out by rotating press block on pull rod and pushing the outer taper surface M of expansion block, whole calibration process is without chip, ensure that the maximum point and minimum point size difference on the same section of conical surface meet the requirements, ensure that grinding is carried out smoothly.

Description

Technical Field

[0001] This utility model belongs to the field of fluid mechanical sealing technology, specifically relating to a preliminary calibration device for machining the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator assembly for a hydraulic system. Background Technology

[0002] The newly developed stainless steel fuel-oil radiator is an engine oil cooling accessory that primarily uses fuel as a cooling medium to cool the high-temperature oil flowing back from the engine. Its inlet and outlet nozzles connect to the external piping using a conical seal. The stainless steel fuel-oil radiator is a fully welded product, such as... Figure 1 and Figure 2 As shown, it includes a heat dissipation core 101 and several oil inlet and outlet nozzles 102. Because the outer interface conical surface is an inner conical surface, the opening is relatively thin, and the outer circle is a connecting thread, the conical surface deforms into a non-circular conical surface due to heat during welding. The difference in size between the maximum and minimum points on the same cross-section exceeds 0.1 mm. Currently, the inlet and outlet of stainless steel oil radiators are traditionally processed by hand grinding or mechanical cutting followed by lapping. This method has the following problems: 1. Low processing efficiency: Manual grinding or machining requires multiple adjustments or tool changes, and each nozzle takes more than 10 minutes to process. 2. Excess material easily accumulates inside the product cavity: During manual grinding or machining, metal shavings fly around and can easily enter the product cavity through the nozzle's inner hole, and are difficult to remove. 3. Product nozzle sealing cone surface scrap: Large welding deformation, thin sealing cone surface at the nozzle opening, and material removal processing can easily cause the sealing cone surface at the nozzle opening to be missing material, resulting in nozzle scrap.

[0003] Compared with traditional or similar stainless steel oil-fired radiators, the newly developed stainless steel oil-fired radiator has the following characteristics: 1. The newly developed stainless steel radiator inlet and outlet nozzles have an inner conical surface, requiring a 100% colored area; 2. The newly developed stainless steel lubricating oil radiator must meet the cleanliness requirements; 3. The newly developed stainless steel lubricating oil radiator has a short development cycle and must be delivered within one month. Summary of the Invention

[0004] To address the problems existing in the background technology, this utility model aims to provide a preliminary calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator. This device performs preliminary calibration on the sealing conical surface of the product that has been deformed by welding, reduces the number of machining processes involving chipping, ensures that the difference in size between the maximum and minimum points of the conical surface on the same cross section is no more than 0.05mm, ensures that grinding can be carried out smoothly, and also reduces the contamination of the inner cavity of the stainless steel fuel oil radiator by iron filings and avoids the phenomenon of missing material at the opening of the sealing conical surface.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A preliminary calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a fuel oil radiator includes: A pull rod, which is a rotating body, includes a lower end, a middle part and an upper end connected coaxially in sequence. The outer surface of the lower end is an outer conical surface Y, the outer surface of the middle part has an external thread, and the upper end has a flat part formed by a pair of parallel planes, and the pair of parallel planes are parallel to the axis of the pull rod. The expansion block is a rotating body, comprising a coaxial upper part and a lower part, wherein the upper part includes a coaxial outer conical surface M and an inner conical surface H, and the lower part includes a coaxial outer cylindrical surface A and an inner conical surface N; The pressure block is a frustum of a cone with an outer conical surface J on its side. A regular polyprism coaxial with the frustum is connected to its bottom surface. The bottom surface of the regular polyprism has a threaded through hole that passes through the regular polyprism and the frustum and is coaxial with the regular polyprism and the frustum. The outer nut is a rotating body with a stepped through hole on its axial end face. The hole wall at the first axial end face of the stepped through hole is a smooth surface, and the hole wall at the second axial end face of the stepped through hole is threaded. The pull rod is connected to the threaded through hole of the pressure block via an external thread on its outer surface in the middle. The pull rod and the pressure block are simultaneously assembled inside the expansion block, wherein the outer conical surface Y of the lower end of the pull rod matches the inner conical surface N of the expansion block, the outer conical surface J of the pressure block matches the inner conical surface H of the expansion block, and the regular polygonal prism of the pressure block is located outside the axial first end hole corresponding to the stepped through hole of the outer nut. The outer conical surface M of the expansion block is placed in the stepped through hole of the outer sleeve nut, and at least a portion of the outer cylindrical surface A is located outside the corresponding axial second end hole of the stepped through hole of the outer sleeve nut.

[0006] As one embodiment, the upper part of the expansion block includes a left part and a right part that are symmetrical about the center of the expansion block axis. The left part includes an outer conical surface M and an inner conical surface H with a width of Q. The right part also includes an outer conical surface M and an inner conical surface H with a width of Q. The width Q is smaller than the maximum inner diameter of the inner conical surface H.

[0007] As one option, a weight-reducing groove R is provided on the lower outer cylindrical surface A of the expansion block and at one end of the outer conical surface M near the upper part. The weight-reducing groove R is an annular groove coaxial with the outer cylindrical surface A.

[0008] As one embodiment, the upper part of the expansion block and the axial end face of the inner conical surface H near the inner conical surface N have multiple expansion slots C. The multiple expansion slots C are distributed at equal angles along a circumference coaxial with the inner conical surface H, and the expansion slots C extend along the axial direction of the inner conical surface H.

[0009] As one embodiment, the lower part of the expansion block and located on the outer cylindrical surface A have multiple expansion slits D. The multiple expansion slits D are distributed at equal angles along the circumferential direction of the outer cylindrical surface A, and the expansion slits D extend along the generatrix direction of the outer cylindrical surface A.

[0010] Compared with the prior art, this utility model provides a preliminary calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator. Through the working principle of the interaction of five conical surfaces (outer conical surface Y, outer conical surface J, inner conical surface H, outer conical surface M, and inner conical surface N), the device realizes the alignment of the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator, and calibrates the high points of the post-weld deformation of the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator. This ensures that the difference in size between the maximum and minimum points of the conical surface on the same cross section is no more than 0.05mm, thereby ensuring that grinding can be carried out smoothly.

[0011] Because the expansion block of the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel radiator has expansion gaps C and D at the top and bottom, and the wall thickness of the weight reduction groove R in the middle is very small, the material is high-quality spring steel, and after appropriate heat treatment, its elasticity is optimal, and it can be pried open with two fingers. This makes the operation light and labor-saving. Since the calibration is only performed on the high point of the sealing cone surface, a symmetrical part with a width of Q at the top of the expansion block is designed, so there is no need to calibrate the entire sealing cone surface. This makes the operation even more convenient and labor-saving, reduces assembly and force application time, and improves production efficiency.

[0012] This utility model also has the following advantages: 1. This utility model has a simple and lightweight structure, is easy to install and disassemble, and uses the principle of expansion due to the interaction of conical surfaces to achieve processing without iron filings, thus ensuring the cleanliness requirements of the inside of the stainless steel fuel oil radiator and solving the problem of missing material at the sealing conical opening of the inlet and outlet nozzles of the stainless steel fuel oil radiator.

[0013] 2. This utility model is easy to operate, and operators can master the key points after simple training, which can effectively improve production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the welding structure of a stainless steel radiator and its various inlet and outlet nozzles. Figure 2 yes Figure 1 AA section view; Figure 3 This is a schematic diagram of the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator. Figure 4 This is a schematic diagram of the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator. Figure 5This is a schematic view of the structure of the bulge; Figure 6 yes Figure 5 Top view; Figure 7 This is a schematic diagram of the tie rod structure; Figure 8 This is a schematic diagram of the compaction block structure; Figure 9 yes Figure 8 Top view; Figure 10 This is a schematic diagram of the outer nut structure; In the diagram: 101 heat sink, 102 lubricating oil inlet / outlet nozzle, 1 tie rod, 2 expansion block, 3 pressure block, and 4 outer nut. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0016] like Figures 3-10 As shown, this utility model designs a preliminary calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator, including a pull rod 1, an expansion block 2, a pressure block 3, and an outer nut 4. The outer cylindrical surface A of the expansion block 2 corresponds to the inner bore surface ΦA of the inlet and outlet nozzles of the stainless steel fuel oil radiator (see...). Figure 2 The outer conical surface M corresponds to the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator, and the inner thread of the outer nut 4 corresponds to the outer thread of the inlet and outlet nozzles of the stainless steel fuel oil radiator.

[0017] like Figure 7 The pull rod 1 is a rotating body, including a lower end, a middle part and an upper end connected coaxially in sequence. The outer surface of the lower end is an outer conical surface Y, the outer surface of the middle part has an external thread, and the upper end has a flat part formed by a pair of parallel planes, and the pair of parallel planes are parallel to the axis of the pull rod 1. like Figure 5 and Figure 6 The expansion block 2 is a rotating body, comprising a coaxial upper part and a lower part, wherein the upper part includes a coaxial outer conical surface M and an inner conical surface H, and the lower part includes a coaxial outer cylindrical surface A and an inner conical surface N; further, the upper part of the expansion block 2 includes a left part and a right part that are symmetrical about the axis of the expansion block 2, the left part includes an outer conical surface M and an inner conical surface H with a width of Q, and the right part also includes an outer conical surface M and an inner conical surface H with a width of Q, wherein the width Q is smaller than the maximum inner diameter of the inner conical surface H; like Figure 8 and Figure 9The pressure block 3 is a frustum of a cone, and its side surface forms an outer conical surface J. A regular hexagonal prism coaxial with the frustum is connected to its bottom surface. The bottom surface of the regular hexagonal prism has a threaded through hole that penetrates the regular polygonal prism and the frustum of a cone and is coaxial with the regular hexagonal prism and the frustum of a cone. like Figure 10 The outer nut 4 is a rotating body with a cylindrical surface T on its outer surface. A stepped through hole is opened on its axial end face. The stepped through hole contains a stepped end face L. The hole wall at the hole opening of the first axial end face K corresponding to the stepped through hole is a smooth surface. The hole wall at the hole opening of the second axial end face corresponding to the stepped through hole has internal threads. The pull rod 1 is connected to the threaded through hole of the pressure block 3 via the external thread on the outer surface of its middle part; The pull rod 1 and the pressure block 3 are simultaneously assembled inside the expansion block 2. The outer conical surface Y at the lower end of the pull rod 1 matches the inner conical surface N of the expansion block 2, and the outer conical surface J of the pressure block 3 matches the inner conical surface H of the expansion block 2. The regular polygonal prism of the pressure block 3 is located outside the axial first end hole corresponding to the stepped through hole of the outer nut 4. The outer conical surface M of the expansion block 2 is placed in the stepped through hole of the outer sleeve nut 4, and at least part of the outer cylindrical surface A is located outside the corresponding axial second end hole of the stepped through hole of the outer sleeve nut 4. Expansion slots C and D are opened on the upper and lower parts of the expansion block 2. The wall thickness of the annular weight reduction groove R in the middle is very small. The material is high-quality spring steel, which is subjected to appropriate heat treatment to make its elasticity optimal, so that it can be easily pried open, making the operation light and labor-saving.

[0018] To save time and effort during expansion, the outer conical surface M of expansion block 2 only retains the portion with a width of Q (e.g., ...). Figure 6 The calibration is only applied to the high point of the inner conical sealing surface of the inlet and outlet nozzles of stainless steel fuel oil radiators.

[0019] The outer conical surface M of the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator is accurately aligned with the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator. The hole K at the upper end of the outer nut 4 is larger than the maximum diameter of the pressure block 3 (but smaller than the maximum outer diameter of the outer conical surface M, i.e., the outer diameter of the end face O). Then, the outer nut 4 is installed on the inlet and outlet nozzles of the stainless steel fuel oil radiator.

[0020] To ensure that the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator can work normally after being installed in the inlet and outlet nozzles of the stainless steel fuel oil radiator, the upper end of the pull rod 1 has a flat X to prevent rotation, and the middle section has a threaded block that rotates up and down. The middle of the pressure block 3 has a threaded hole, and rotating the thread makes it easy for the pressure block 3 to move up and down on the pull rod 1.

[0021] The principle and characteristics of the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel lubricating oil radiator: 1. Automatic centering: After installing the initial alignment device for the inner conical sealing surface of the stainless steel fuel oil radiator inlet and outlet nozzles into the stainless steel fuel oil radiator inlet and outlet nozzles, rotate the pressure block 3. The outer cylindrical surface A is pressed against the inner hole surface ΦA of the stainless steel fuel oil radiator inlet and outlet nozzles, automatically ensuring that the center of the initial alignment device for the inner conical sealing surface of the stainless steel fuel oil radiator inlet and outlet nozzles coincides with the center of the inner hole surface ΦA of the stainless steel fuel oil radiator inlet and outlet nozzles.

[0022] 2. No iron filings processing: No iron filings were generated in block 2 throughout the entire process.

[0023] refer to Figure 4 The initial calibration method for the inner conical sealing surface of the inlet and outlet nozzles of a stainless steel fuel oil radiator is as follows: 1. Based on the coloring of the inner conical sealing surfaces of the inlet and outlet nozzles of the stainless steel fuel oil radiator, identify the highest point of the inner conical sealing surfaces of the inlet and outlet nozzles of the stainless steel fuel oil radiator (i.e., the location that needs to be calibrated).

[0024] 2. Install the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel oil radiator into the inlet and outlet nozzles of the stainless steel oil radiator. Figure 4 Align the outer conical surface M of the expansion block 2 with the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator, ensuring that the initial alignment device of the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator remains stationary. Install the outer nut 4 onto the connecting thread on the outer diameter of the inlet and outlet nozzles of the stainless steel fuel oil radiator, ensuring that the outer nut 4 presses the expansion block 2 tightly (i.e., Figure 5 end face O and Figure 10 The stepped end face L is pressed tightly together.

[0025] 3. Use a special tool (such as a vise) to fix the flat X at the upper end of the pull rod 1 to prevent rotation. Then use a wrench to turn the outer hexagonal surface of the pressure block 3, causing the pressure block 3 to move along the axial direction of the pull rod 1. This allows the outer conical surface Y to press against the inner conical surface N, which in turn pushes the outer cylindrical surface A. This causes the outer cylindrical surface A at the lower end of the expansion block 2 to be in close contact with the inner hole surface ΦA of the inlet and outlet nozzles of the stainless steel fuel oil radiator, ensuring the centering and positioning of the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator. At the same time, the outer conical surface M at the upper end of the expansion block 2 expands under the action of the outer conical surface J at the lower end of the pressure block 3 pressing against the inner conical surface H, thus calibrating the inner conical sealing surface of the inlet and outlet nozzles of the stainless steel fuel oil radiator.

[0026] 4. Disassembly: Remove the outer nut 4, loosen the pressure block 3, and remove the initial calibration device for the inner conical sealing surface of the stainless steel fuel oil radiator inlet and outlet nozzles from the stainless steel fuel oil radiator inlet and outlet nozzles.

[0027] After the stainless steel radiator inlet and outlet nozzle inner conical sealing surface of the stainless steel radiator with welding deformation is corrected by the initial calibration device of this utility model, the size difference between the maximum point and the minimum point on the same cross section of the conical surface is guaranteed to be no more than 0.05mm, thereby ensuring the requirements before grinding.

[0028] In terms of applicability, the initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of this stainless steel radiator is simple in structure and easy to operate. After a brief introduction, the operator can master its operating techniques and operate it with ease.

[0029] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A preliminary calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a fuel oil radiator, characterized in that, include: The pull rod (1) is a rotating body, including a lower end, a middle part and an upper end connected coaxially in sequence. The outer surface of the lower end is an outer conical surface Y, the outer surface of the middle part has an external thread, and the upper end has a flat part formed by a pair of parallel planes, and the pair of parallel planes are parallel to the axis of the pull rod (1). The expansion block (2) is a rotating body, comprising a coaxial upper part and a lower part, wherein the upper part comprises a coaxial outer conical surface M and an inner conical surface H, and the lower part comprises a coaxial outer cylindrical surface A and an inner conical surface N; The pressure block (3) is a frustum, with an outer conical surface J formed on its side. A regular polyhedron coaxial with the frustum is connected to its bottom surface. A threaded through hole coaxial with the regular polyhedron and the frustum is opened on the bottom surface of the regular polyhedron. Outer nut (4), the outer nut (4) is a rotating body, with a stepped through hole on its axial end face, and the hole wall at the first axial end face of the stepped through hole is a smooth surface, and the hole wall at the second axial end face of the stepped through hole has an internal thread. The pull rod (1) is connected to the threaded through hole of the pressure block (3) by the external thread on the outer surface of the middle part; The pull rod (1) and the pressure block (3) are simultaneously assembled inside the expansion block (2), wherein the outer conical surface Y of the lower end of the pull rod (1) matches the inner conical surface N of the expansion block (2), the outer conical surface J of the pressure block (3) matches the inner conical surface H of the expansion block (2), and the regular polygonal prism of the pressure block (3) is located outside the axial first end hole corresponding to the stepped through hole of the outer nut (4); The outer conical surface M of the expansion block (2) is placed in the stepped through hole of the outer sleeve nut (4), and at least a portion of the outer cylindrical surface A is located outside the axial second end hole corresponding to the stepped through hole of the outer sleeve nut (4).

2. The initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a lubricating oil radiator according to claim 1, characterized in that: The upper part of the expansion block (2) includes a left part and a right part that are symmetrical about the axis of the expansion block (2). The left part includes an outer conical surface M and an inner conical surface H with a width of Q. The right part also includes an outer conical surface M and an inner conical surface H with a width of Q. The width Q is smaller than the maximum inner diameter of the inner conical surface H.

3. The initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a fuel oil radiator according to claim 1, characterized in that: The expansion block (2) has a weight reduction groove R on the lower outer cylindrical surface A and near the upper outer conical surface M. The weight reduction groove R is an annular groove coaxial with the outer cylindrical surface A.

4. The initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a fuel oil radiator according to claim 2, characterized in that: Multiple expansion slots C are opened on the upper part of the expansion block (2) and on the axial end face of the inner conical surface H near the inner conical surface N. The multiple expansion slots C are distributed at intervals along a circumference coaxial with the inner conical surface H with equal center angles. The expansion slots C extend along the axial direction of the inner conical surface H.

5. The initial calibration device for the inner conical sealing surface of the inlet and outlet nozzles of a lubricating oil radiator according to claim 1, characterized in that: The lower part of the expansion block (2) and located on the outer cylindrical surface A have multiple expansion gaps D. The multiple expansion gaps D are distributed at equal angles along the circumferential direction of the outer cylindrical surface A, and the expansion gaps D extend along the generatrix direction of the outer cylindrical surface A.

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