Liner tube press-in pressure head

Abstract

The invention belongs to the field of compressors, and particularly relates to a liner tube press-in pressure head which is used for pressing an air inlet connecting pipe of a compressor into a shell seat ring and comprises a head part, a tail part and a rubber sleeve, and the tail part is also connected with a conductive elastic piece, and the conductive elastic piece is arranged in a gap formed between the tail part and the rubber sleeve and is used for abutting against the housing seat ring to form a conductive path. Compared with the prior art, the problem that in the prior art, when the six-point welding technology is carried out, due to instant short-circuit large current generated by arcing, discharging and sparking are caused in the pump body is solved. A conductive path of the pressure head, the shell seat ring and the air inlet connecting pipe is established, so that current does not pass through a discharge part in the pump body, and the defect of the compressor caused by discharge sparking in the pump body can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the field of compressors, and in particular relates to a liner pressing head. Background Art

[0002] The connection between the air intake connecting pipe and the compressor body is an important step in the compressor assembly process. Usually, the air intake connecting pipe and the cylinder suction port (housing seat ring) are assembled by interference fit.

[0003] During the assembly process, a tooling pressure head is required to cooperate with the pressing of the intake connecting pipe to improve the pressing effect and the convenience of operation of the intake connecting pipe; however, due to the introduction and use of external auxiliary workpieces, some additional problems will be brought about, such as the introduction of impurities, uneven internal and external air pressure, etc. In the prior art, CN201659396U and CN106853573A respectively disclose an intake connecting pipe pressure head that prevents copper cuttings from entering the compressor cylinder and housing and an intake connecting pipe pressing process operation method, which avoids the introduction of impurities by setting a sealing ring and a rubber sleeve and cooperating with structural improvements; such as the tooling pressure head disclosed in CN114535977A, which opens a through hole inside the pressure head to connect the inside and outside to avoid uneven internal and external air pressure.

[0004] However, after the air intake connecting pipe is pressed in, it is necessary to weld and fix the air intake connecting pipe to the housing seat ring and to the external connecting pipeline (refer to the description in CN218563836U). However, in the six-point welding process, a large instantaneous short-circuit current will be generated when the arc is started. This current is easy to directly pass through the inside of the pump body movement to generate welding discharge, which will eventually cause discharge and sparking inside the pump body, thereby causing the off-site compressor to stall and affect product quality. Therefore, it is necessary to propose a further improvement plan to avoid compressor failure caused by discharge and sparking inside the pump body. Summary of the invention

[0005] The purpose of the present invention is to provide a liner pressing head to solve at least one of the above problems, so as to solve the problem of internal discharge and sparking of the pump body caused by the instantaneous short-circuit large current generated by arcing during the six-point welding process in the prior art. The present invention establishes a conductive path between the pressure head, the housing seat ring, and the air intake connecting pipe, so that the current does not pass through the discharge part inside the pump body, which can effectively improve the compressor failure caused by internal discharge and sparking of the pump body.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A liner pressing head is used to press the air intake connecting pipe of the compressor into the housing seat ring, comprising an integrated head and tail and a rubber sleeve sleeved outside the tail;

[0008] The tail portion is also connected with a conductive elastic member, which is arranged in a gap formed by the tail portion and the rubber sleeve and is used to abut against the housing seat ring to form a conductive path.

[0009] Preferably, a plurality of the conductive elastic members are arranged at intervals, and the conductive elastic members are arranged around the tail.

[0010] Preferably, the free end of the conductive elastic member is arranged no higher than the rubber sleeve.

[0011] Preferably, the conductive elastic member is a spring.

[0012] Preferably, the surfaces of the head and the tail are copper-plated, and the conductive elastic member is made of phosphor copper, so as to further enhance the conductivity of the entire pressure head.

[0013] Preferably, the tail portion is provided with a groove at the end, and the rubber sleeve is provided with a clamping strip at the end, and the clamping strip is engaged with the groove to enable the rubber sleeve to be engaged and connected with the tail portion.

[0014] Preferably, the tail portion is provided with an annular groove at the end, and the rubber sleeve is provided with an annular clamping strip at the end.

[0015] Preferably, the front end of the rubber sleeve is provided with an introduction slope.

[0016] Preferably, the pressure head is provided with a through hole along the axis which passes through the head and the tail.

[0017] Preferably, the through hole is a stepped structure, with the diameter increasing step by step from the head to the tail.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The improved liner pressing head adopted in the present invention can lead the instantaneous short-circuit large current generated when the arc is started in the six-point welding process to the outside by establishing a conductive path among the pressure head, the shell seat ring, and the air intake connecting pipe, and preferably selecting the materials of the pressure head and the conductive elastic part, so as to avoid the large current directly passing through the interior of the pump body movement to generate welding discharge and cause discharge sparks and ultimately cause compressor failure.

[0020] The improved liner pressing head adopted in the present invention can save the dotting process (dotting process: deforming the liner through physical extrusion to establish conduction between the shell and the air intake connecting pipe) after the air intake connecting pipe is pressed into the shell seat ring; and this structure can also merge the steps of pre-installing the rubber sleeve and the liner in the original assembly process, thereby reducing the process and saving workstations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional view of the structure of the liner pressing head according to an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a liner pressing head according to an embodiment of the present invention;

[0023] Figure 3 This is a real photo of the liner pressing head (without the rubber sleeve) of the embodiment of the present invention assembled on the housing seat ring (without the air intake connecting pipe);

[0024] In the figure: 1-head; 2-tail; 3-rubber sleeve; 4-conductive elastic member; 5-card strip; 6-introduction slope; 7-through hole. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example

[0027] A liner is pressed into a pressure head, such as Figure 1-3 As shown, it is used to press the air intake connecting pipe of the compressor into the housing seat ring, including an integrated head 1 and tail 2 and a rubber sleeve 3 sleeved outside the tail 2;

[0028] The tail portion 2 is also connected with a conductive elastic member 4, which is disposed in a gap formed by the tail portion 2 and the rubber sleeve 3, and is used to abut against the housing seat ring to form a conductive path.

[0029] More specifically, in this embodiment:

[0030] The liner pressing head is composed of a head 1 and a tail 2 of an integral structure and a rubber sleeve 3 sleeved outside the tail 2. A conductive elastic member 4 is further connected to the tail 2. The conductive elastic member 4 is arranged between the gap formed by the tail 2 and the rubber sleeve 3. Figure 1-3 As shown, the conductive elastic member 4 is a spring sheet, which is arranged in the form of surrounding the tail 2. More specifically, four spring sheets are arranged in this embodiment, which are arranged around the tail 2 at equal intervals. The head 1 and the tail 2 of the pressure head are all processed, and the conductive elastic member 4 is made of phosphor copper to enhance the conductivity of the pressure head. The bending point of the spring sheet is arranged toward the surface of the pressure head tail 2, so that after the pressure head presses the intake connecting pipe into the housing seat ring, the housing seat ring will extend into the gap between the conductive elastic member 4 and the pressure head, so that the front end of the conductive elastic member 4 can abut against the outer wall of the housing seat ring to form a conductive path.

[0031] A groove is provided near the end of the tail 2 of the pressure head, and a clamping strip 5 is provided at the end of the rubber sleeve 3. The clamping strip 5 is clamped into the groove to realize the clamping connection between the rubber sleeve 3 and the pressure head; the present embodiment adopts the cooperation between the annular groove and the annular clamping strip 5 to prevent the rubber sleeve 3 from falling off from the tail 2 of the pressure head. An introduction slope 6 is also provided at the head end of the rubber sleeve 3, which can facilitate the housing seat ring to enter the gap and contact the conductive elastic member 4 when the intake connecting pipe is pressed into the housing seat ring, thereby reducing the assembly accuracy requirements. The setting of the rubber sleeve 3 can also prevent external impurities from splashing into the compressor during welding, thereby preventing the impurities from affecting and damaging the compressor pump body. The setting height of the conductive elastic member 4, that is, the height of its free end, is usually not higher than the free end face of the rubber sleeve 3, so that in actual use, the contact between the conductive elastic member 4 and the housing seat ring is always maintained within the rubber sleeve 3, and the rubber sleeve 3 can better wrap the housing seat ring and protect the conductive elastic member 4.

[0032] A through hole 7 is provided inside the head 1 and the tail 2 along the axis of the pressure head. The through hole 7 provides a passage connecting the inside and the outside when the pressure head is pressed into the air intake connecting pipe, thereby avoiding the pressure head from bursting due to the pressure difference between the inside and the outside. In addition, the through hole 7 adopts a stepped structure design from the head 1 to the tail 2, and the diameter is gradually expanded from the head 1 to the tail 2; in this embodiment, as Figure 1 As shown, the first step is from the head 1 to the front of the tail 2 (near the bending point of the spring), the second step is from the front of the tail 2 to the rear of the tail 2 (the end position of the rubber sleeve 3), and the third step is from the rear of the tail 2 to the end of the tail 2, wherein the tail 2 (from the second step to the third step) can be directly designed as a countersunk hole to achieve the overall connection and fixation of the pressure head and keep the external structure flat. The stepped through hole 7 can reduce the weight of the tail 2, thereby avoiding the phenomenon that the center of gravity of the pressure head is biased toward the tail 2 and is easy to fall; and the stepped structure is also conducive to rapid airflow and segmented heat exchange.

[0033] By using the liner pressing head, compressor failure caused by internal discharge and sparking in the pump body can be improved, the spotting process can be replaced, and the existing process of plugging the rubber sleeve 3 can be eliminated.

[0034] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A liner pressing head, used to press the air intake connecting pipe of the compressor into the housing seat ring, characterized in that: It comprises an integrated head (1) and tail (2) and a rubber sleeve (3) sleeved outside the tail (2); The tail portion (2) is also connected to a conductive elastic member (4), which is arranged in a gap formed by the tail portion (2) and the rubber sleeve (3) and is used to abut against the housing seat ring to form a conductive path.

2. A liner pressing head according to claim 1, characterized in that: A plurality of the conductive elastic members (4) are arranged at intervals, and the conductive elastic members (4) are arranged around the tail portion (2).

3. A liner pressing head according to claim 1, characterized in that: The free end of the conductive elastic member (4) is arranged no higher than the rubber sleeve (3).

4. A liner pressing head according to claim 1, characterized in that: The conductive elastic member (4) is a spring sheet.

5. A liner pressing head according to claim 1, characterized in that: The surfaces of the head (1) and the tail (2) are copper-plated, and the conductive elastic member (4) is made of phosphor copper.

6. A liner pressing head according to claim 1, characterized in that: The tail portion (2) is provided with a groove at the end, and the rubber sleeve (3) is provided with a clamping strip (5) at the end. The clamping strip (5) is engaged with the groove so that the rubber sleeve (3) and the tail portion (2) are engaged and connected.

7. A liner pressing head according to claim 6, characterized in that: The tail portion (2) is provided with an annular groove at the end, and the rubber sleeve (3) is provided with an annular clamping strip at the end.

8. A liner pressing head according to claim 1, characterized in that: The front end of the rubber sleeve (3) is provided with an introduction slope (6).

9. A liner pressing head according to claim 1, characterized in that: The pressure head is provided with a through hole (7) along the axis which passes through the head (1) and the tail (2).

10. A liner pressing head according to claim 9, characterized in that: The through hole (7) is a stepped structure, with the diameter increasing step by step from the head (1) to the tail (2).

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