Tool and method for disassembling auxiliary stuffing box of ammonia pump

Abstract

The invention discloses a tool and a method for disassembling an auxiliary stuffing box of an ammonia pump, which mainly utilize the original internal thread structures of the auxiliary stuffing box and a crosshead, connect the auxiliary stuffing box with the crosshead through the disassembling tool, and then drive the crosshead to move through a jigger, so that the auxiliary stuffing box can be pulled out, and the auxiliary stuffing box is easy to disassemble. According to the main technical scheme, the ammonia pump auxiliary stuffing box disassembling tool comprises a first flange connecting piece, a second flange connecting piece and a third flange connecting piece, and the first flange connecting piece is provided with a first external thread matched with a first internal thread; the second flange connecting piece is provided with a second external thread matched with the second internal thread; and the at least one middle connecting piece is used for being connected with the second flange connecting piece and the second flange connecting piece. The disassembling device is mainly used for disassembling the auxiliary stuffing box.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine machinery, and in particular to a tool and method for disassembling an auxiliary stuffing box of an ammonia pump. Background Art

[0002] The ammonia pump is used to transport and pressurize liquid ammonia from the synthetic ammonia section. In the high-pressure ammonia pump including the auxiliary stuffing box and the main stuffing box, the auxiliary stuffing box is inserted into the main stuffing box. When replacing the stuffing, the auxiliary stuffing box needs to be pulled out from the main stuffing box. However, the auxiliary stuffing box is tightly connected with the main stuffing box, which makes it extremely difficult to disassemble the auxiliary stuffing box. It is necessary to use a copper rod to knock through the auxiliary stuffing box from the combination valve cavity. The operation is difficult and the process is time-consuming and labor-intensive. In addition, the oil ring in the stuffing box is easily deformed by knocking, resulting in burrs on the oil ring. The burrs scratch the plunger, which is easy to cause the plunger to be pulled, resulting in a high frequency of plunger replacement, a large consumption of spare parts, and increased production costs. Summary of the invention

[0003] In view of this, in order to solve at least one of the aforementioned technical problems, an embodiment of the present invention provides a tool and method for disassembling an auxiliary stuffing box of an ammonia pump.

[0004] In order to achieve the above object, the present invention mainly provides the following technical solutions:

[0005] On the one hand, the present invention provides an ammonia pump auxiliary stuffing box disassembly tool for an ammonia pump, the ammonia pump comprising an auxiliary stuffing box and a crosshead, the auxiliary stuffing box being provided with a first internal thread, the crosshead being provided with a second internal thread, the ammonia pump auxiliary stuffing box disassembly tool comprising:

[0006] A first flange connection piece (100), the first flange connection piece (100) being provided with a first external thread matching the first internal thread;

[0007] A second flange connection piece (200), the second flange connection piece (200) being provided with a second external thread matching the second internal thread;

[0008] At least one intermediate connection piece (300), the intermediate connection piece (300) is used to connect with the second flange connection piece (200) and the second flange connection piece (200).

[0009] The first flange connection member (100) comprises a first flange plate (110) and a first connection column (120), and the first connection column (120) is provided with a first external thread;

[0010] The second flange connection member (200) comprises a second flange plate (210) and a second connection column (220), and the second connection column (220) is provided with a second external thread.

[0011] Wherein, the first connecting column (120) and the second connecting column (220) are both hollow columns.

[0012] The first flange (110) is provided with at least one first connection through hole (111), the second flange (210) is provided with at least one second connection through hole (211), and the first connection through hole (111) and the second connection through hole (211) are located opposite to each other;

[0013] The intermediate connection piece (300) is used to fix the relative position of the second flange connection piece (200) and the second flange connection piece (200) through the first connection through hole (111) and the second connection through hole (211).

[0014] The intermediate connecting member (300) comprises a bolt and a nut, wherein the bolt is used to be inserted into the first connecting through hole (111) and the second connecting through hole (211), and the nut is used to be screwed onto the bolt.

[0015] At least one of the first connecting through hole (111) and the second connecting through hole (211) is a screw hole, and the intermediate connecting member (300) comprises a bolt, which is used to be screwed into the screw hole.

[0016] The number of the first connecting through holes (111) is at least two, and the at least two first connecting through holes (111) are evenly distributed in the circumferential direction around the first connecting column (120).

[0017] On the other hand, the present invention further provides a method for disassembling an auxiliary stuffing box of an ammonia pump, which is implemented by using any of the above-mentioned tools for disassembling the auxiliary stuffing box of an ammonia pump, and the method comprises:

[0018] Remove the crosshead pressure cap, auxiliary stuffing box pressure cap and plunger;

[0019] Threading the first flange connector to the auxiliary stuffing box;

[0020] Threading the second flange connector to the crosshead;

[0021] Driving the crosshead to move until the second flange connection piece abuts against the first flange connection piece;

[0022] Install the intermediate connector and fix the second flange connector and the first flange connector;

[0023] The driving crosshead moves the auxiliary stuffing box.

[0024] The embodiment of the present invention proposes a disassembly tool for the auxiliary stuffing box of an ammonia pump, which mainly utilizes the original internal thread structure of the auxiliary stuffing box and the crosshead. The auxiliary stuffing box is connected to the crosshead through the disassembly tool, and then the crosshead is driven to move by the turning gear, so that the auxiliary stuffing box can be pulled out, making the disassembly of the auxiliary stuffing box simple. In the prior art, it is necessary to knock the auxiliary stuffing box from the combined valve cavity with a copper rod, which is difficult to operate, time-consuming and labor-intensive, and the oil ring in the stuffing box is easily deformed by knocking, resulting in burrs on the oil ring, which scratch the plunger and easily cause the plunger to be roughened, resulting in high frequency of plunger replacement, large consumption of spare parts, and increased production costs. Compared with the prior art, in the present application document, when disassembling the auxiliary stuffing box of the ammonia pump, the first flange connector is threadedly connected to the auxiliary stuffing box, the second flange connector is threadedly connected to the crosshead, and the relative positions of the first flange connector and the second flange connector are fixed by the intermediate connector, and then the ammonia pump turntable can be opened to drive the crosshead to move, and the pull of the turntable is used to drive the auxiliary stuffing box to be pulled out of the main stuffing box, and then the auxiliary stuffing box is disassembled without knocking, which greatly shortens the time and difficulty of disassembling the auxiliary stuffing box, and is not easy to damage the auxiliary stuffing box. In addition, the original structure of the auxiliary stuffing box and the crosshead is used, and no additional improvement of the existing structure is required, and the versatility is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of a first flange connector and a second flange connector in a tool for disassembling an auxiliary stuffing box of an ammonia pump provided by an embodiment of the present invention;

[0026] Figure 2 A partial structural schematic diagram of an intermediate connecting piece in a tool for disassembling an auxiliary stuffing box of an ammonia pump provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation method, structure, characteristics and effects of the ammonia pump auxiliary stuffing box disassembly tool proposed in the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] On the one hand, if Figure 1-2 As shown, the present invention provides an ammonia pump auxiliary stuffing box disassembly tool for an ammonia pump, the ammonia pump comprising an auxiliary stuffing box and a crosshead, the auxiliary stuffing box being provided with a first internal thread, the crosshead being provided with a second internal thread, the ammonia pump auxiliary stuffing box disassembly tool comprising:

[0029] A first flange connection piece (100), the first flange connection piece (100) being provided with a first external thread matching the first internal thread;

[0030] A second flange connection piece (200), the second flange connection piece (200) being provided with a second external thread matching the second internal thread;

[0031] At least one intermediate connection piece (300), the intermediate connection piece (300) is used to connect with the second flange connection piece (200) and the second flange connection piece (200).

[0032] The ammonia pump can be a variety of existing ammonia pumps with main and auxiliary fillers, such as a P101A / B high-pressure ammonia pump. The main stuffing box and the auxiliary stuffing box are both similar cylindrical and hollow structures. The auxiliary stuffing box is partially inserted into the main stuffing box and is tightly abutted against the main stuffing box. The plunger is also called a piston rod. According to the normal production process of the ammonia pump, the crosshead is connected to one end of the plunger and is pressed by the crosshead pressure cap so that the crosshead and the plunger are linked. The pressure cap of the crosshead is connected to the crosshead through the internal thread of the inner wall of the crosshead, that is, the second internal thread. The plunger is connected to the auxiliary stuffing box and the main stuffing box from the other end, and there are gaps between the auxiliary stuffing box, the main stuffing box and the plunger. The gap between the auxiliary stuffing box and the plunger is filled with elastic auxiliary stuffing, and the gap between the main stuffing box and the plunger is filled with elastic main stuffing. The pressure cap of the auxiliary stuffing box is connected to the auxiliary stuffing box through the internal thread of the inner wall of the auxiliary stuffing box, that is, the first thread, and acts on the auxiliary stuffing. The main stuffing is located at the rear side of the auxiliary stuffing box, or at the side of the auxiliary stuffing box opposite to the crosshead. After a period of use, the main stuffing and the auxiliary stuffing need to be replaced. Since the main stuffing is located inside, the auxiliary stuffing box needs to be removed from the main stuffing box before the main stuffing can be removed. The ammonia pump auxiliary stuffing box disassembly tool of the present application is used for disassembly of the auxiliary stuffing box. During disassembly, the pressure cap of the auxiliary stuffing box is unscrewed, the pressure cap is separated from the auxiliary stuffing box, the pressure cap of the crosshead is unscrewed, the pressure cap is separated from the crosshead, and the plunger is pulled out of the auxiliary stuffing box. At this time, the auxiliary stuffing box and the crosshead will be directly opposite and coaxially arranged, and the internal threads of the auxiliary stuffing box and the crosshead are leaking out. Then the first flange connector (100) can be threadedly connected to the auxiliary stuffing box and tightened. The second flange connector (200) is threadedly connected to the crosshead and tightened. Finally, at least the axial position of the first flange connector (100) and the second flange connector (200) is fixed by the intermediate connector (300). The auxiliary stuffing box and the crosshead are fixedly connected via the first flange connection piece (100) and the second flange connection piece (200), and then the ammonia pump is turned to drive the crosshead and the main stuffing box to move relative to each other, and then the auxiliary stuffing box is drawn out of the main stuffing box.

[0033] The first external thread matched with the first internal thread means that the first flange connection (100) can be screwed onto the auxiliary stuffing box by means of a thread, the second external thread matched with the second internal thread means that the second flange connection (200) can be screwed onto the crosshead by means of a thread, and the intermediate connection (300) is used to connect with the second flange connection (200) and the second flange connection (200) to fix the second flange connection (200) and the second flange connection (200), which can be fixed only in the axial direction of the plunger, or can be fixed in both the axial and circumferential directions of the plunger.

[0034] The embodiment of the present invention proposes a disassembly tool for the auxiliary stuffing box of an ammonia pump, which mainly utilizes the original internal thread structure of the auxiliary stuffing box and the crosshead. The auxiliary stuffing box is connected to the crosshead through the disassembly tool, and then the crosshead is driven to move by the turning gear, so that the auxiliary stuffing box can be pulled out, making the disassembly of the auxiliary stuffing box simple. In the prior art, it is necessary to knock the auxiliary stuffing box from the combined valve cavity with a copper rod, which is difficult to operate, time-consuming and labor-intensive, and the oil ring in the stuffing box is easily deformed by knocking, resulting in burrs on the oil ring, which scratch the plunger and easily cause the plunger to be roughened, resulting in high frequency of plunger replacement, large consumption of spare parts, and increased production costs. Compared with the prior art, in the present application document, when disassembling the auxiliary stuffing box of the ammonia pump, the first flange connector is threadedly connected to the auxiliary stuffing box, the second flange connector is threadedly connected to the crosshead, and the relative positions of the first flange connector and the second flange connector are fixed by the intermediate connector, and then the ammonia pump turntable can be opened to drive the crosshead to move, and the pull of the turntable is used to drive the auxiliary stuffing box to be pulled out of the main stuffing box, and then the auxiliary stuffing box is disassembled without knocking, which greatly shortens the time and difficulty of disassembling the auxiliary stuffing box, and is not easy to damage the auxiliary stuffing box. In addition, the original structure of the auxiliary stuffing box and the crosshead is used, and no additional improvement of the existing structure is required, and the versatility is strong.

[0035] In one embodiment, the first flange connection member (100) includes a first flange plate (110) and a first connection column (120), and the first connection column (120) is provided with a first external thread. The second flange connection member (200) includes a second flange plate (210) and a second connection column (220), and the second connection column (220) is provided with a second external thread.

[0036] The first flange (110) and the second flange (210) have similar structures, both of which are approximately annular plate structures. The outer diameters of the first flange (110) and the second flange (210) can be consistent. The first connecting column (120) and the second connecting column (220) can both be hollow columns, which play a role in reducing the weight of the first flange connector (100) and the second flange connector (200). When in use, the first connecting column (120) is screwed to the auxiliary stuffing box, and the first flange (110) is exposed and faces the second flange connector (200). The second connecting column (220) is screwed to the crosshead, and the second flange (210) is exposed and faces the first flange (110).

[0037] In one embodiment, at least one first connection through-hole (111) is provided on the first flange (110), and at least one second connection through-hole (211) is provided on the second flange (210), and the first connection through-hole (111) and the second connection through-hole (211) are located relative to each other. The intermediate connection member (300) is used to fix the relative position of the second flange connection member (200) and the second flange connection member (200) through the first connection through-hole (111) and the second connection through-hole (211).

[0038] Depending on the different fixing methods of the intermediate connecting member (300), the specific forms of the first connecting through hole (111) and the second connecting through hole (211) are also different. For example, in one embodiment, Figure 2 As shown, the intermediate connecting member (300) includes bolts and nuts, wherein the bolts are used to be inserted into the first connecting through-hole (111) and the second connecting through-hole (211), and the nuts are used to be screwed onto the bolts, and the first flange (110) and the second flange (210) are locked by the cooperation of the bolts and the nuts.

[0039] In another embodiment, at least one of the first connection through hole (111) and the second connection through hole (211) is a screw hole, and the intermediate connection member (300) includes a bolt, which is used to be screwed into the screw hole. If the first connection through hole (111) is a through hole and the second connection through hole (211) is a screw hole, the bolt is inserted from one side of the first connection through hole (111), then moved to the second connection through hole (211), and threadedly connected to the second connection through hole (211), thereby locking the first flange (110) and the second flange (210). When locking the first flange (110) and the second flange (210), it is preferred that the first flange (110) and the second flange (210) are in abutment with each other.

[0040] In one embodiment, the number of the first connecting through holes (111) is at least two, and the at least two first connecting through holes (111) are evenly distributed in the circumferential direction around the first connecting column (120).

[0041] The first connecting through hole (111) and the second connecting through hole (211) are arranged opposite to each other in the axial direction, and the first connecting through hole (111) is evenly distributed in the circumferential direction around the first connecting column (120), so that when the auxiliary stuffing box is pulled, the auxiliary stuffing box can be pulled out evenly in the circumferential direction without tilting relative to the main stuffing box, thereby avoiding extraction failure.

[0042] In a more specific embodiment, the number of the first connection through-hole (111) and the number of the second connection through-hole (211) are both four. The following provides the dimensions of the first flange connection member (100) and the second flange connection member (200) in a specific embodiment:

[0043] The outer diameter a of the first flange (110) is 160 mm, the hole distance b of the radially opposite first connecting through holes (111) is 123 mm, the major diameter c of the external thread on the first connecting column (120) is 68 mm, and the inner diameter d of the first connecting column (120) is 50 mm.

[0044] The outer diameter of the second flange (210) is 160 mm, the hole spacing of the radially opposite first connecting through holes (211) is 123 mm, the major diameter e of the external thread on the second connecting column (220) is 90 mm, the inner diameter f of the second connecting column (220) is 66 mm, the axial height g of the second connecting column (220) is 36 mm, and the overall axial height h of the second flange connecting piece (200) is 56 mm.

[0045] The inner diameters of the first connection through hole (111) and the second connection through hole (211) are 14 mm. When the intermediate connection member (300) is a combination of a bolt and a nut, the bolt may be an M12X50 bolt.

[0046] On the other hand, the present invention further provides a method for disassembling an auxiliary stuffing box of an ammonia pump, which is implemented by using any of the above-mentioned tools for disassembling the auxiliary stuffing box of an ammonia pump, and the method comprises:

[0047] Step 1: Remove the crosshead pressure cap, auxiliary stuffing box pressure cap and plunger;

[0048] Step 2: Thread the first flange connector to the auxiliary stuffing box;

[0049] Step 3: Connect the second flange connector to the crosshead thread;

[0050] Step 4: driving the crosshead to move until the second flange connection piece abuts against the first flange connection piece;

[0051] Step 5: Install the intermediate connector and fix the second flange connector and the first flange connector;

[0052] Step 6: Drive the crosshead to move the auxiliary stuffing box.

[0053] The above steps can be specifically referred to the description of the ammonia pump auxiliary stuffing box disassembly tool. Starting the crosshead to drive the auxiliary stuffing box to move is specifically: the operator manually turns the high-pressure ammonia pump coupling, so that the crankshaft drives the connecting rod and the crosshead, and then pulls out the auxiliary stuffing box.

[0054] It is worth mentioning that in step 4, the second flange connection is moved to abut against the first flange connection, specifically, the second flange (210) is abutted against the first flange (110) on opposite sides, so that the second flange (210) and the first flange (110) are tightly fitted, and then the intermediate connection is installed in step 5. For example, when the intermediate connection (300) is a combination of bolts and nuts, the bolts and nuts cooperate to tightly lock the tightly arranged second flange (210) and the first flange (110), so that the connection strength between the crosshead and the auxiliary stuffing box is greater. Then, when the crosshead moves, it is not easy to shake or the second flange (210) and the first flange (110) are not easy to loosen, so that the auxiliary stuffing box can be pulled out smoothly.

[0055] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An ammonia pump auxiliary stuffing box disassembly tool, used for an ammonia pump, the ammonia pump comprising an auxiliary stuffing box and a crosshead, the auxiliary stuffing box being provided with a first internal thread, the crosshead being provided with a second internal thread, characterized in that: The ammonia pump auxiliary stuffing box disassembly tool comprises: A first flange connection piece (100), wherein the first flange connection piece (100) is provided with a first external thread matching the first internal thread; A second flange connection piece (200), wherein the second flange connection piece (200) is provided with a second external thread matching the second internal thread; At least one intermediate connection piece (300), the intermediate connection piece (300) being used to connect with the second flange connection piece (200) and the second flange connection piece (200).

2. The ammonia pump auxiliary stuffing box disassembly tool according to claim 1, characterized in that: The first flange connection member (100) comprises a first flange plate (110) and a first connection column (120), and the first connection column (120) is provided with the first external thread; The second flange connection member (200) comprises a second flange plate (210) and a second connection column (220), and the second connection column (220) is provided with the second external thread.

3. The ammonia pump auxiliary stuffing box disassembly tool according to claim 2, characterized in that: The first connecting column (120) and the second connecting column (220) are both hollow columns.

4. The ammonia pump auxiliary stuffing box disassembly tool according to claim 2, characterized in that: The first flange (110) is provided with at least one first connecting through hole (111), and the second flange (210) is provided with at least one second connecting through hole (211), and the first connecting through hole (111) and the second connecting through hole (211) are located opposite to each other; The intermediate connection piece (300) is used to fix the relative position of the second flange connection piece (200) and the second flange connection piece (200) through the first connection through hole (111) and the second connection through hole (211).

5. The ammonia pump auxiliary stuffing box disassembly tool according to claim 3, characterized in that: The intermediate connecting member (300) comprises a bolt and a nut, wherein the bolt is used to be inserted into the first connecting through hole (111) and the second connecting through hole (211), and the nut is used to be screwed onto the bolt.

6. The ammonia pump auxiliary stuffing box disassembly tool according to claim 3, characterized in that: At least one of the first connecting through hole (111) and the second connecting through hole (211) is a screw hole, and the intermediate connecting member (300) comprises a bolt, and the bolt is used to be screwed into the screw hole.

7. The ammonia pump auxiliary stuffing box disassembly tool according to claim 3, characterized in that: The number of the first connecting through holes (111) is at least two, and the at least two first connecting through holes (111) are evenly distributed in a circumferential direction around the first connecting column (120).

8. A method for disassembling an auxiliary stuffing box of an ammonia pump, characterized in that: The method is implemented by using the ammonia pump auxiliary stuffing box disassembly tool described in any one of claims 1 to 7, and the method comprises: Remove the crosshead pressure cap, auxiliary stuffing box pressure cap and plunger; Threading the first flange connector to the auxiliary stuffing box; Threading the second flange connector to the crosshead; Driving the crosshead to move until the second flange connection piece abuts against the first flange connection piece; Install the intermediate connection piece to fix the second flange connection piece and the first flange connection piece; The driving crosshead moves the auxiliary stuffing box.

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