A pump body anti-sparking device that can be pressed into a coupling pipe

Abstract

A pump body anti-arcing device capable of being pressed into a coupling pipe relates to the technical field of compressor manufacturing, and aims to solve the problems of single function of traditional anti-arcing pin, additional dismounting of the anti-arcing pin and special pressing tool required for pressing the coupling pipe. The device comprises a suction pipe inserted into the suction port of the cylinder of the pump body, a coupling pipe sleeved in the suction pipe, and an anti-arcing pin assembled in the sleeve of the shell assembly; the anti-arcing pin comprises a silica gel protective sleeve, a fixing seat, a spring contact piece fixed by a bolt, and an axially sliding pressing pin; the device does not need to dismount the anti-arcing pin, can build a low-resistance loop anti-arcing during three-point welding, and the pressing pin can push the coupling pipe to the standard depth in the pressing process; the utility model simplifies the operation steps, reduces the labor intensity, and improves the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of compressor manufacturing technology, specifically to an integrated device that has the dual functions of "preventing arcing during pump body assembly" and "pressing in connecting pipes" during the assembly process of compressor pump bodies. It is applicable to the assembly process of pump bodies and outer casing components of various types of compressors, such as rotary and scroll compressors. Background Technology

[0002] During the compressor manufacturing process, the three-point welding process between the pump body and the outer casing assembly must avoid internal sparking in the pump body (sparking can damage key components such as the pump body cylinder and upper bearing, reducing the product qualification rate). At the same time, the connecting pipe must be pressed into the standard depth of the pump body cylinder suction port (to ensure smooth refrigerant flow).

[0003] In existing technologies, the anti-sparking function and the connecting pipe press-in function need to be achieved through two separate sets of components: Anti-sparking pin structure limitations: Traditional anti-sparking pins are "integral fixed base + spring contact plate" structure, which can only build a low resistance circuit for welding current through reliable contact between the spring contact plate and the outer casing sleeve (to avoid current breakdown of internal pump components), and has no moving parts, so it cannot participate in the pressing of the connecting pipe; Traditional assembly processes are cumbersome. Step 1 (Pre-installation of connecting pipe): Pre-install the suction pipe and connecting pipe to the suction port of the pump body cylinder, and then install the traditional anti-sparking pin to ensure good contact between the spring contact plate and the outer casing sleeve. Step 2 (three-point welding): The welding torch ignites an arc on the bearing on the pump body, and the current flows through the circuit of "welding power positive terminal - welding torch - bearing on pump body - pump body cylinder - suction pipe - connecting pipe - anti-sparking pin - outer shell assembly - grounding pressure head - welding power negative terminal" to achieve anti-sparking. Step 3 (Connecting pipe pressing): The anti-sparking pin needs to be removed manually, and then the connecting pipe needs to be pressed in to the standard depth using a special pressing tool. Consequences of existing technology: Traditional solutions have problems such as "cumbersome procedures and the need for special pressing tools", which cannot meet the needs of large-scale compressor production. Utility Model Content

[0004] In view of the shortcomings of existing technologies, such as "traditional anti-sparking pins having a single function and the need for additional removal and special pressing tools for pressing in connecting pipes", the purpose of this utility model is to provide an integrated device that can simultaneously achieve "three-point welding anti-sparking" and "connecting pipe pressing in" without removing the anti-sparking pins, thus simplifying the process and reducing labor intensity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pump body anti-sparking device with a press-fit connecting pipe, comprising an intake pipe for inserting into the intake port of the pump body cylinder, a connecting pipe fitted inside the intake pipe, and an anti-sparking pin clamped in the outer casing assembly sleeve. The key technical points are: the anti-sparking pin includes an external silicone protective sleeve, a fixing seat inside the silicone protective sleeve, a spring contact piece fixed to the fixing seat, and a pressure pin axially movable inside the fixing seat; the spring contact piece is fixedly connected to the fixing seat by bolts on both sides; the pressure pin has elongated through holes for inserting bolts on both sides; the diameter of the pressure pin is the same as the diameter of the connecting pipe.

[0006] Furthermore, the fixed base is provided with a threaded through hole that mates with the bolt; the spring contact plate is provided with a through hole for the bolt to pass through.

[0007] The beneficial effects and features of this utility model are as follows: This utility model integrates the functions of "anti-sparking" and "connecting pipe press-in", eliminating the need to remove the anti-sparking pin and saving the step of "removing the anti-sparking pin" in the traditional process; at the same time, the connecting pipe can be pressed in without special pressing tools; it simplifies the operation steps, reduces labor intensity, and improves production efficiency. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the usage state of this utility model; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 This is a schematic diagram of the anti-sparking pin part in this utility model.

[0009] The main components in the diagram are numbered as follows: 1. Anti-sparking pin; 101. Silicone protective sleeve; 102. Fixing base; 103. Spring contact plate; 104. Bolt; 105. Pressure pin; 106. Elongated through hole; 2. Suction pipe; 3. Connecting pipe; 4. Outer shell assembly sleeve; 5. Outer shell assembly; 6. Pump body cylinder suction port; 7. Pump body upper bearing; 8. Welding torch; 9. Grounding pressure head.

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and the other drawings obtained are all within the protection scope claimed by this utility model. Detailed Implementation

[0011] The following combination Figure 1-3The contents of this utility model will be described in detail through specific embodiments. Example

[0012] A pump body anti-sparking device with a press-fit connecting pipe includes an intake pipe 2 for insertion into the pump body cylinder intake port 6, a connecting pipe 3 fitted inside the intake pipe 2, and an anti-sparking pin 1 clamped in the outer casing assembly sleeve 4. The anti-sparking pin 1 includes an outer silicone protective sleeve 101, a fixing seat 102 disposed inside the silicone protective sleeve 101, a spring contact 103 fixed to the fixing seat 102, and a pressure pin 105 axially movable inside the fixing seat 102. The spring contact 103 is fixedly connected to the fixing seat 102 by bolts 104 on both sides. The pressure pin 105 has elongated through holes 106 for insertion of the bolts 104 on both sides, preventing interference between the pressure pin 105 and the bolts 104 during sliding. The pressure pin 105 is attached to the inside of the intake pipe 2, and the diameter of the pressure pin 105 is the same as the diameter of the connecting pipe 3, facilitating the pressure pin 105 to push the connecting pipe 3 into the pump body cylinder. The fixed base 102 is provided with a threaded through hole that mates with the bolt 104; the spring contact plate 103 is provided with a through hole for the bolt 104 to pass through.

[0013] How to use this utility model: Step 1 (Pre-insertion of connecting pipe and assembly of anti-spark pin): Fit the connecting pipe 3 inside the suction pipe 2; insert the suction pipe 2 with the connecting pipe 3 into the suction port 6 of the pump body cylinder (insertion depth 1cm); assemble the anti-spark pin 1 onto the sleeve of the outer casing assembly 5 through its internal spring contact 103, while the suction pipe 2 is inserted into the anti-spark pin 1. Step 2 (Three-point welding anti-arc): Start the welding power supply, and the welding torch 8 starts an arc at the welding point of the bearing 7 on the pump body; the current flows through the loop of "welding power supply positive terminal - welding torch 8 - bearing 7 on the pump body - pump body cylinder - suction pipe 2 - connecting pipe 3 - anti-arc pin 1 - outer shell assembly 5 - grounding pressure head 9 - welding power supply negative terminal" (confirm that the loop resistance is stable and there is no abnormal arc by using a current detector to achieve anti-arc); after completing the three-point welding, turn off the welding power supply.

[0014] Step 3 (Connecting pipe pressing): Align the pressing head of the pressing device with the upper end face of the pressing pin 105 of the anti-sparking pin 1; start the pressing device, and the pressing head pushes the pressing pin 105 to slide axially inward along the sliding hole of the fixed seat 102 with a pressure of 10-15N. The pressing pin 105 pushes the connecting pipe 3 into the pump body cylinder; until the pressing surface of the pressing pin 105 is parallel to the fixed seat 102, and the connecting pipe 3 is pressed in to the standard depth.

Claims

1. A pump body anti-sparking device with a press-fit connecting pipe, comprising an intake pipe (2) for inserting into the intake port (6) of the pump body cylinder, a connecting pipe (3) fitted inside the intake pipe (2), and an anti-sparking pin (1) clamped in the outer casing assembly sleeve (4), characterized in that: The anti-sparking pin (1) includes an outer silicone protective sleeve (101), a fixing seat (102) disposed inside the silicone protective sleeve (101), a spring contact (103) fixed on the fixing seat (102), and a pressure pin (105) axially movable inside the fixing seat (102); the spring contact (103) is fixedly connected to the fixing seat (102) by bolts (104) on both sides; the pressure pin (105) is provided with an elongated through hole (106) for the bolts (104) on both sides to be inserted; the diameter of the pressure pin (105) is the same as the diameter of the connecting pipe (3).

2. The pump body anti-sparking device with a press-fit connecting pipe according to claim 1, characterized in that: The fixed base (102) is provided with a threaded through hole that mates with the bolt (104); the spring contact plate (103) is provided with a through hole for the bolt (104) to pass through.

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