Device for protecting key groove during chromium plating of shaft of centrifugal pump

Abstract

The utility model discloses a device for protecting a key slot during chromium plating of a shaft of a centrifugal pump, which comprises a glue storage main body and a glue injection main body, the glue storage main body is respectively provided with a first chamber and a second chamber, the glue injection main body is respectively provided with a third chamber, a fourth chamber, a glue injection port and a plurality of exhaust ports, and the exhaust ports are communicated with the first chamber and the second chamber. A first piston is connected in the first cavity in a sliding mode in the axial direction and filled with silicone sealant, a second piston is connected in the second cavity in a sliding mode in the axial direction, and a heating piece is further arranged in the fourth cavity. According to the scheme, silicone sealant is injected into the key groove through the device, the key groove is filled and protected through the silicone sealant, in this way, a shaft cannot be damaged, meanwhile, operation is very convenient, the working efficiency is improved, after chromium plating is completed, the whole filled silicone sealant can be completely taken out only by slightly pulling outwards, and the service life of the key groove is prolonged. Therefore, taking out is very convenient, and efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a device for protecting a keyway when chrome plating a shaft of a centrifugal pump. Background Art

[0002] A centrifugal pump is a common type of pump that uses the centrifugal force generated by the rotation of an impeller to transport fluid. As the impeller rotates, the fluid is drawn into the pump, accelerated, and thrown along the outer edge of the impeller, generating pressure.

[0003] The shaft of a centrifugal pump is a crucial component. To improve its performance and service life, the shaft is often chrome-plated during production. This chrome plating significantly improves the shaft's hardness, wear resistance, and corrosion resistance. Furthermore, the shaft is often equipped with multiple keyways, which connect the shaft to other components. During chrome plating, these keyways need to be protected. Existing methods typically involve striking lead blocks to fill and protect the keyways. However, this method is inefficient and often causes the keyway skin to collapse, damaging the shaft. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a device for protecting the keyway during chrome plating of the shaft of a centrifugal pump, which will not cause damage to the shaft and is convenient to fill and remove after chrome plating is completed.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A device for protecting a keyway when chrome-plating the shaft of a centrifugal pump, the device comprising a glue storage body and a glue injection body, the glue storage body being an overall cylindrical structure, the glue injection body being an overall conical structure, and the large end of the conical structure of the glue injection body transitioning to a smooth connection with the glue storage body, a first chamber and a second chamber being respectively provided on the glue storage body, a third chamber, a fourth chamber, a glue injection port and a plurality of exhaust ports being respectively provided on the glue injection body, the two ends of the third chamber being respectively communicated with the first chamber and the glue injection port, the two ends of the fourth chamber being respectively communicated with the second chamber and the plurality of exhaust ports, a first piston being slidably connected in an axial direction in the first chamber, a first chamber between the first piston and the third chamber being filled with silicone sealant so that the silicone sealant is injected into the third chamber by the sliding of the first piston in the first chamber, a second piston being slidably connected in an axial direction in the second chamber, and a heating element being further provided in the fourth chamber.

[0007] The working principle of this solution is as follows: when protecting the keyway, the first chamber is filled with silicone sealant, and then the injection body is extended into the keyway that needs to be protected by injection, and the first piston is pushed to move in the direction close to the injection body in the first chamber. At this time, the first piston will push the silicone sealant in the first chamber into the third chamber. As the first piston keeps moving in the direction of the injection body in the first chamber, the silicone sealant continues to enter the third chamber and finally flows out of the injection port and is injected into the keyway. Since the silicone sealant will collapse due to water loss after drying, it is easy to cause the silicone sealant to fail to completely fill the keyway after drying. The hot air discharged from the multiple exhaust ports will act on the silicone sealant in the keyway, and the hot air will accelerate the evaporation of water in the silicone sealant. In this way, the silicone sealant in the keyway is in a relatively dry state after the injection is completed, so the collapse after the injection is completed can be effectively reduced.

[0008] When the device of this solution is used to protect the keyway, silicone sealant is injected into the keyway through the device, and the keyway is filled and protected with silicone sealant, which will not cause damage to the shaft. At the same time, the device of this solution is used to inject silicone sealant into the keyway, which is very convenient to operate and improves work efficiency. At the same time, after the chrome plating is completed, the entire filled silicone sealant can be completely removed by gently pulling it outwards, which is also very convenient to remove and improves efficiency.

[0009] Preferably, the plurality of exhaust ports are evenly distributed along the circumference of the glue injection port.

[0010] In this way, the multiple exhaust ports are evenly distributed along the circumference of the injection port, thereby evenly acting on the silicone sealant from all sides, thereby ensuring the overall drying effect of the silicone sealant.

[0011] Preferably, the first piston includes a first piston head and a first piston tail, the first piston head is slidably connected in the first chamber, and the first piston tail extends out of the first chamber, and the second piston includes a second piston head and a second piston tail, the second piston head is slidably connected in the second chamber, and the second piston tail extends out of the second chamber.

[0012] In this way, the tail of the first piston extends out of the first chamber, and the tail of the second piston extends out of the second chamber, so that the first piston and the second piston can be moved conveniently.

[0013] Preferably, the device further comprises an operating rod, wherein the operating rod is connected to the first piston tail portion and the second piston tail portion respectively.

[0014] In this way, by connecting the operating rod to the tail of the first piston and the tail of the second piston respectively, the first piston and the second piston can be moved simultaneously by using the operating rod, which makes the operation more convenient and more efficient.

[0015] Preferably, the heating element is an electric heating wire or a heating resistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of a device for protecting a keyway when chrome plating a shaft of a centrifugal pump according to the present invention;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0018] Figure 3 The utility model is a schematic diagram of the state of the device for protecting the keyway when chrome plating the shaft of a centrifugal pump during glue injection.

[0019] Explanation of the accompanying drawings: glue storage body 1, first chamber 101, second chamber 102, glue injection body 2, third chamber 201, fourth chamber 202, glue injection port 203, exhaust port 204, operating rod 3, first piston 4, first piston tail 401, first piston head 402, second piston 5, second piston tail 501, second piston head 502, heating element 6, silicone sealant 7. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the utility model belongs.

[0021] The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "a", "an" or "the" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] As attached Figure 1 and attached Figure 2 As shown, a device for protecting the keyway when chrome-plating the shaft of a centrifugal pump is used. The device is mainly used to inject silicone sealant 7 into the keyway. The device includes a glue storage body 1 and a glue injection body 2. The glue storage body 1 is an overall cylindrical structure, and the glue injection body 2 is an overall conical structure. The large end of the conical structure of the glue injection body 2 transitions to a smooth connection with the glue storage body 1.

[0023] The glue storage body 1 is provided with a first chamber 101 and a second chamber 102, respectively. The glue injection body 2 is provided with a third chamber 201, a fourth chamber 202, a glue injection port 203, and a plurality of exhaust ports 204. The plurality of exhaust ports 204 are evenly distributed along the circumference of the glue injection port 203, thereby uniformly applying the silicone sealant 7 to the surrounding area and ensuring the overall drying effect of the silicone sealant 7. The two ends of the third chamber 201 are respectively connected to the first chamber 101 and the glue injection port 203, and the two ends of the fourth chamber 202 are respectively connected to the second chamber 102 and the plurality of exhaust ports 204.

[0024] A first piston 4 is slidably connected in the axial direction in the first chamber 101. The first piston 4 includes a first piston head 402 and a first piston tail 401. The first piston head 402 is slidably connected in the first chamber 101, and the first piston tail 401 extends out of the first chamber 101. The first chamber 101 between the first piston 4 and the third chamber 201 is filled with silicone sealant 7. The silicone sealant 7 is injected into the third chamber 201 by the sliding of the first piston 4 in the first chamber 101, as shown in the attached figure. Figure 3 shown.

[0025] The second piston 5 is slidably connected to the second chamber 102 along the axial direction. The second piston head 502 is slidably connected to the second chamber 102, and the second piston tail 501 extends out of the second chamber 102. When the second piston 5 moves, it can cause the air in the fourth chamber 202 to be discharged from the exhaust port 204.

[0026] A heating element 6 is further provided in the fourth chamber 202. The heating element 6 is an electric heating wire or a heating resistor. The heating element 6 heats the air in the fourth chamber 202, thereby making the air discharged from the exhaust port 204 hot air, which can better dry the silicone sealant 7.

[0027] The device of this scheme also comprises an operating rod 3, and the operating rod 3 is respectively connected with the first piston tail 401 and the second piston tail 501. In this way, by operating the operating rod 3, the movement of the first piston 4 and the second piston 5 can be realized simultaneously.

[0028] The working principle of this solution is as follows: when protecting the keyway, the first chamber 101 is filled with silicone sealant 7, and then the injection body 2 is extended into the keyway that needs to be protected by injection, and the first piston 4 is pushed to move in the first chamber 101 toward the injection body 2. At this time, the first piston 4 will push the silicone sealant 7 in the first chamber 101 into the third chamber 201. As the first piston 4 keeps moving in the first chamber 101 toward the injection body 2, the silicone sealant 7 keeps entering the third chamber 201 and finally flows out of the injection port 203 and is injected into the keyway. Since the silicone sealant 7 will collapse due to water loss after drying, it is easy to cause the silicone sealant 7 to fail to be completely filled after drying. The keyway is in a state of being filled with chrome, and chrome burrs appear at the keyway edge. In order to reduce the collapse, this solution moves the second piston 5 in a direction close to the injection body 2 while injecting glue into the keyway, and uses the heating element 6 in the fourth chamber 202 to heat the air in the fourth chamber 202. As the second piston 5 continues to move in a direction close to the injection body 2, the hot air in the fourth chamber 202 will be discharged from the multiple exhaust ports 204. The hot air discharged from the multiple exhaust ports 204 will act on the silicone sealant 7 in the keyway, and the hot air will be used to accelerate the evaporation of moisture in the silicone sealant 7. In this way, the silicone sealant 7 in the keyway is in a relatively dry state after the injection is completed, so the collapse after the injection is completed can be effectively reduced.

[0029] When the device of this solution is used to protect the keyway, silicone sealant 7 is injected into the keyway through the device, and the keyway is filled and protected with the silicone sealant 7, which will not cause damage to the shaft. At the same time, the device of this solution is used to inject silicone sealant 7 into the keyway, which is very convenient to operate and improves work efficiency. At the same time, after the chrome plating is completed, the entire filled silicone sealant 7 can be completely removed by gently pulling it outwards, which is also very convenient to remove and improves efficiency.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A device for protecting the keyway of a centrifugal pump shaft during chrome plating, the device being used to inject silicone sealant into the keyway, characterized in that: The device includes a glue storage body and a glue injection body, the glue storage body is a cylindrical structure as a whole, the glue injection body is a conical structure as a whole, and the large end of the conical structure of the glue injection body transitions to a smooth connection with the glue storage body, a first chamber and a second chamber are respectively provided on the glue storage body, and a third chamber, a fourth chamber, a glue injection port and multiple exhaust ports are respectively provided on the glue injection body, the two ends of the third chamber are respectively connected to the first chamber and the glue injection port, the two ends of the fourth chamber are respectively connected to the second chamber and the multiple exhaust ports, a first piston is connected to the first chamber in an axial direction for sliding, and silicone sealant is filled in the first chamber between the first piston and the third chamber so that the silicone sealant is injected into the third chamber by the sliding of the first piston in the first chamber, a second piston is connected to the second chamber in an axial direction for sliding, and a heating element is also provided in the fourth chamber.

2. The device for protecting the keyway during chrome plating of a centrifugal pump shaft according to claim 1, characterized in that: The plurality of exhaust ports are evenly distributed along the circumference of the glue injection port.

3. The device for protecting the keyway during chrome plating of a centrifugal pump shaft according to claim 1, characterized in that: The first piston includes a first piston head and a first piston tail, the first piston head is slidably connected in the first chamber, and the first piston tail extends out of the first chamber, and the second piston includes a second piston head and a second piston tail, the second piston head is slidably connected in the second chamber, and the second piston tail extends out of the second chamber.

4. The device for protecting the keyway during chrome plating of a centrifugal pump shaft according to claim 3, characterized in that: The device further comprises an operating rod, wherein the operating rod is connected to the first piston tail and the second piston tail respectively.

5. The device for protecting the keyway during chrome plating of a centrifugal pump shaft according to claim 1, characterized in that: The heating element is an electric heating wire or a heating resistor.

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