A reciprocating compressor stuffing box

Abstract

This application discloses a stuffing box for a reciprocating compressor, belonging to the field of compressor technology. A stuffing box for a reciprocating compressor includes a flange, a protrusion on one side of the flange, an end cover on the protruding side of the flange, and multiple stuffing boxes stacked sequentially between the flange and the end cover. The flange has an injection chamber and a discharge chamber inside, and an injection groove and a discharge groove are formed on the protrusion. The injection chamber and the injection groove are connected, and the discharge chamber and the discharge groove are also connected. Multiple vertically penetrating connecting holes are formed on the stuffing box. A cooling groove is formed on the side of the stuffing box away from the flange, located at one end of the connecting hole. Adjacent stuffing boxes or a stuffing box and the flange are connected by a first threaded rod. The first threaded rod has a cavity in the middle and is threaded only at the lower part. The first threaded rod passes through two adjacent connecting holes. By using the first threaded rod, adjacent stuffing boxes can be installed, allowing the user to adjust the number of stuffing boxes as needed.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more specifically, to a stuffing box for a reciprocating compressor. Background Technology

[0002] Reciprocating compressors, as widely used gas compression equipment, play a vital role in many industrial fields such as chemical, petroleum, natural gas, and refrigeration. One of their core components is the stuffing box, whose main function is to seal the gap between the cylinder and the piston rod, preventing gas leakage, while allowing the piston rod to reciprocate within the cylinder, ensuring the normal operation and high efficiency of the compressor.

[0003] A search revealed that Chinese patent CN208221029U discloses a compressor stuffing box with easy heat dissipation. This device, by having a connecting screw pass sequentially through the flange, each of the stuffing boxes, and the end of the stuffing box sleeve, serves two purposes: firstly, it connects the flange, the stuffing boxes, and the stuffing box sleeve, ensuring the sealing effect of the stuffing box; secondly, because the connecting screw is made of copper-aluminum alloy and has an internal water injection hole that acts as a cooling water channel, and because the connecting screw has a first heat dissipation hole communicating with the inner cavity and a second heat dissipation hole communicating with the outside on both sides, and both the first and second heat dissipation holes are filled with heat-dissipating silicone, the heat generated by the friction between the piston rod and the stuffing box can be quickly discharged to the outside through the heat-dissipating silicone, the connecting screw, or the cooling water in the water injection hole.

[0004] Because the aforementioned device uses a single screw to connect multiple stuffing boxes, the number of stuffing boxes must correspond to the length of the screw, which negatively impacts the flexible arrangement of the stuffing boxes. Therefore, we propose a reciprocating compressor stuffing box design. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this application is to provide a stuffing box for a reciprocating compressor to solve the problems mentioned in the background art.

[0007] 2. Technical Solution

[0008] This application is achieved through the following technical solution:

[0009] A reciprocating compressor stuffing box includes a flange, a protrusion on one side of the flange, an end cover on the protrusion side of the flange, a plurality of stuffing boxes between the flange and the end cover, the plurality of stuffing boxes being stacked sequentially, an injection chamber and a discharge chamber inside the flange, an injection groove and a discharge groove being formed on the protrusion, the injection chamber and the injection groove being connected, and the discharge chamber and the discharge groove being connected.

[0010] The packing box has multiple through-holes. A cooling groove is provided on the side of the packing box away from the flange. The cooling groove is located at one end of the through-hole. Two adjacent packing boxes or the packing box and the flange are connected by a first threaded rod. The first threaded rod has a cavity in the middle. The first threaded rod is only threaded at the lower part. The first threaded rod passes through two adjacent through-holes. The lower part of the first threaded rod is threaded to the inner wall of the through-hole or the flange. The upper part of the first threaded rod is rotatably connected to the inner wall of the through-hole. Two adjacent cooling grooves are connected through the cavity. The injection chamber, drainage chamber, injection groove, and drainage groove are all connected to the cooling groove through the cavity. Multiple second threaded rods are rotatably connected to the end cap. The second threaded rods extend into the through-hole and are threaded to the packing box.

[0011] As an optional solution to the technical solution of this application, a first threaded rod rotatably connected to the stuffing box and a first threaded rod threadedly connected to the stuffing box are alternately arranged.

[0012] As an optional solution to the technical solution in this application, the cavity is arranged in a prismatic shape.

[0013] As an optional solution to the technical solution in this application, the packing box is provided with a boss on the side away from the cooling tank. The boss is inserted into and engaged with both the injection tank and the drainage tank, and the boss is inserted into and engaged with the cooling tank.

[0014] As an optional solution to the technical solution of this application, a rotating groove is provided on the upper part of the second threaded rod, and the rotating groove is arranged in a prism shape.

[0015] As an optional solution to the technical solution in this application, the stuffing box is provided with a sealing ring assembly, which includes a locking ring, a sealing ring, and a flow-blocking ring.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] 1) This application uses a first threaded rod to install adjacent stuffing boxes, which makes it convenient for users to adjust the number of stuffing boxes as needed. Since the pressure between the stuffing boxes depends only on the first threaded rod used to connect them, even if some of the first threaded rods become loose, the sealing performance of this device can be guaranteed due to the redundant design.

[0019] 2) This application provides a cavity in the middle of the first threaded rod, allowing the coolant in the injection chamber to flow through the cavity into the cooling tank and then through the cavity into the drainage chamber, thereby achieving the cooling effect of the device. This eliminates the need to open additional channels on the packing box and ensures the strength of the structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a reciprocating compressor stuffing box;

[0021] Figure 2 This is a schematic diagram of the flange structure of a reciprocating compressor stuffing box;

[0022] Figure 3 This is a schematic diagram of the stuffing box structure of a reciprocating compressor stuffing box;

[0023] Figure 4 This is a schematic diagram of the end cover structure of a stuffing box for a reciprocating compressor;

[0024] In the diagram: 1. Flange; 101. Protrusion; 102. Injection chamber; 103. Drainage chamber; 104. Injection groove; 105. Drainage groove; 2. Packing box; 201. Connecting hole; 202. Cooling groove; 203. Boss; 3. First threaded rod; 301. Cavity; 4. End cap; 5. Second threaded rod; 501. Rotating groove. Detailed Implementation

[0025] The technical solution of this application will now be clearly and completely described in conjunction with the accompanying drawings.

[0026] Please see Figures 1 to 4 This application provides a technical solution:

[0027] A reciprocating compressor stuffing box includes a flange 1, a protrusion 101 on one side of the flange 1, an end cover 4 on the side of the protrusion 101 of the flange 1, a plurality of stuffing boxes 2 between the flange 1 and the end cover 4, the plurality of stuffing boxes 2 being stacked sequentially, an injection chamber 102 and a discharge chamber 103 inside the flange 1, an injection groove 104 and a discharge groove 105 on the protrusion 101, the injection chamber 102 communicating with the injection groove 104, and the discharge chamber 103 communicating with the discharge groove 105;

[0028] The packing box 2 has multiple through-holes 201. A cooling groove 202 is provided on the side of the packing box 2 away from the flange 1. The cooling groove 202 is located at one end of the through-hole 201. Two adjacent packing boxes 2 or the packing box 2 and the flange 1 are connected by a first threaded rod 3. The first threaded rod 3 has a cavity 301 in the middle. The first threaded rod 3 is only threaded at the lower part. The first threaded rod 3 passes through two adjacent through-holes 201. The lower part of the first threaded rod 3 is threaded to the inner wall of the through-hole 201 or the flange 1. The upper part of the first threaded rod 3 is rotatably connected to the inner wall of the through-hole 201. Two adjacent cooling grooves 202 are connected through the cavity 301. The liquid injection chamber 102, the liquid discharge chamber 103, the liquid injection groove 104, and the liquid discharge groove 105 are all connected to the cooling groove 202 through the cavity 301. Multiple second threaded rods 5 are rotatably connected to the end cap 4. The second threaded rods 5 extend into the through-hole 201 and are threaded to the packing box 2.

[0029] In this application, a first threaded rod 3 is placed in part of the connection holes 201 of the packing box 2, and the first threaded rod 3 is threaded to the flange 1, so that both the injection chamber 102 and the drainage chamber 103 can be connected to the cooling tank 202 through the cavity 301. The coolant injected into the injection chamber 102 can flow back to the drainage chamber 103 through the cavity 301, the cooling tank 202, and the cavity 301. Similarly, another packing box 2 is stacked, and a first threaded rod 3 is placed in part of the connection holes 201. The lower part of the first threaded rod 3 is threaded to the remaining connection holes 201 of the lower packing box 2, so that both the injection tank 104 and the drainage tank 105 can be connected to the cooling tank 202 through the cavity 301. The coolant injected into the injection chamber 102 can flow back to the drainage chamber 103 through the injection tank 104, the cavity 301, the cooling tank 202, the cavity 301, and the drainage tank 105. Users can freely adjust the number of packing boxes 2 as needed, and install end caps 4 on the end packing boxes 2 to seal the cooling tank 202.

[0030] like Figure 3 As shown, the first threaded rod 3 rotatably connected to the stuffing box 2 and the first threaded rod 3 threadedly connected to the stuffing box 2 are alternately arranged. The first threaded rod 3 is arranged in a ring at equal intervals on the stuffing box 2, which increases the uniformity of the force on the stuffing box 2 and helps to increase the sealing effect of the device.

[0031] Preferably, the cavity 301 is prismatic in shape, and the upper part of the second threaded rod 5 is provided with a rotating groove 501. The rotating groove 501 is prismatic in shape, and the user can use a prismatic tool to insert into the cavity 301 or the rotating groove 501 to rotate the first threaded rod 3 or the second threaded rod 5 to realize the installation of the stuffing box 2 and the end cover 4.

[0032] Preferably, the packing box 2 has a boss 203 on the side away from the cooling tank 202. The boss 203 is inserted into the injection tank 104 and the drainage tank 105. The boss 203 is inserted into the cooling tank 202. By increasing the path at the joint, the sealing performance of the device is increased, and the coolant leakage is prevented.

[0033] Preferably, the stuffing box 2 is provided with a sealing ring assembly, which includes a locking ring, a sealing ring, and a flow-blocking ring, thereby reducing the leakage rate through graded sealing.

Claims

1. A stuffing box for a reciprocating compressor, characterized in that: Includes a flange (1), a protrusion (101) on one side of the flange (1), an end cap (4) on the side of the protrusion (101) of the flange (1), a plurality of packing boxes (2) between the flange (1) and the end cap (4), the plurality of packing boxes (2) being stacked one on top of the other, an injection chamber (102) and a drainage chamber (103) inside the flange (1), an injection groove (104) and a drainage groove (105) on the protrusion (101), the injection chamber (102) and the injection groove (104) being connected, and the drainage chamber (103) and the drainage groove (105) being connected; The packing box (2) has multiple through-holes (201) on its upper and lower sides. A cooling groove (202) is provided on the side of the packing box (2) away from the flange (1). The cooling groove (202) is located at one end of the through-hole (201). Two adjacent packing boxes (2) or the packing box (2) and the flange (1) are connected by a first threaded rod (3). The first threaded rod (3) has a cavity (301) in its middle. The first threaded rod (3) has threads only at its lower part. The first threaded rod (3) passes through two adjacent through-holes (201). 3) The lower part is threaded to the inner wall of the connecting hole (201) or the flange (1). The upper part of the first threaded rod (3) is rotatably connected to the inner wall of the connecting hole (201). The two adjacent cooling tanks (202) are connected through the cavity (301). The liquid injection chamber (102), the liquid discharge chamber (103), the liquid injection groove (104), and the liquid discharge groove (105) are all connected to the cooling tank (202) through the cavity (301). A plurality of second threaded rods (5) are rotatably connected to the end cap (4). The second threaded rods (5) extend into the connecting hole (201) and are threaded to the packing box (2).

2. The stuffing box for a reciprocating compressor according to claim 1, characterized in that: The first threaded rod (3) rotatably connected to the stuffing box (2) and the first threaded rod (3) threadedly connected to the stuffing box (2) are alternately arranged.

3. The stuffing box for a reciprocating compressor according to claim 1, characterized in that: The cavity (301) is arranged in a prismatic shape.

4. The stuffing box for a reciprocating compressor according to claim 1, characterized in that: The packing box (2) has a boss (203) on the side away from the cooling tank (202). The boss (203) is inserted into the injection tank (104) and the drainage tank (105). The boss (203) is also inserted into the cooling tank (202).

5. A reciprocating compressor stuffing box according to claim 1, characterized in that: The second threaded rod (5) has a rotating groove (501) on its upper part, and the rotating groove (501) is prismatic.

6. A reciprocating compressor stuffing box according to claim 1, characterized in that: The packing box (2) is provided with a sealing ring assembly, which includes a locking ring, a sealing ring, and a flow-blocking ring.

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