Valve casting pickling device for water supply pipeline

Abstract

This utility model relates to an acid pickling device for castings of water pipe valves, comprising: an acid pickling tank with a concave pickling groove at the top, the pickling groove having several sets of steps along its length to form a support surface for the casting, and a gap between adjacent steps to form a retrieval gap; and a rotating part rotatably disposed within the acid pickling tank, the rotation center of the rotating part being coaxial with the acid pickling tank, the rotating part including a rotating base plate, the edge of the rotating base plate matching the shape of the inner wall of the acid pickling tank, and a retrieval arm extending along the rotation direction provided on the side end of the rotating base plate. This utility model achieves the placement and retrieval of castings through the rotation of the rotating part, eliminating the need for workers to directly contact the acid pickling solution throughout the process; when the rotating base plate is horizontal, the acid pickling solution level is lower than its lower end surface, and combined with the hollow structure, residual acid in the casting can be effectively drained, preventing workers from contacting corrosive liquids when handling castings, significantly improving operational safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of pickling equipment, and specifically relates to a pickling equipment for casting valves of tap water pipelines. Background Technology

[0002] In tap water delivery systems, pipeline valves are critical control components, and the quality of their castings directly affects the system's sealing performance, corrosion resistance, and long-term operational stability. During the casting process, valve castings often develop surface and internal oxide layers, impurities, and residues due to high-temperature oxidation. If these are not thoroughly removed, they can not only reduce the valve's mechanical properties but also become sources of corrosion, affecting water quality safety. Therefore, pickling, as a crucial pretreatment step for valve castings, must effectively remove oxides and impurities through chemical methods while ensuring the formation of a stable passivation film on the metal surface to extend service life and meet stringent water quality requirements.

[0003] In the existing technology, pickling equipment relies on manual loading and unloading, and operators need to directly contact the highly corrosive pickling solution, which can easily lead to safety accidents due to acid splashing or residual liquid on the surface of the casting. At the same time, the existing device lacks an effective draining structure, and the acid carried by the casting is easy to drip or splash when it is taken out, which increases the operational risk. Utility Model Content

[0004] This utility model addresses the problems in the prior art by providing an acid pickling device for castings of water supply pipeline valves. The specific technical solution is as follows:

[0005] A pickling device for castings of water pipe valves, including:

[0006] The pickling tank has a concave pickling groove at the top, and several sets of steps along its length to form a support surface for the casting. There is a gap between two adjacent steps to form a retrieval gap.

[0007] The rotating part is rotatably disposed in the pickling tank, and the rotation center of the rotating part is coaxial with the pickling tank. The rotating part includes a rotating base plate, the edge of the rotating base plate is matched with the shape of the inner wall of the pickling tank, and the side end of the rotating base plate is provided with a scooping arm extending along the rotation direction. Several sets of scooping arms are arranged at intervals along the longitudinal direction of the rotating base plate to form scooping claws. The scooping claws extend into the scooping gap as the rotating base plate rotates and scoop up the casting.

[0008] As a further technical solution of this utility model, the retrieval claw is provided in two sets, which are respectively connected to the two sides of the rotating base plate, and the two are symmetrical about the center of rotation.

[0009] As a further technical solution of this utility model, when the rotating substrate is in a horizontal state, the rotating substrate and the pickling tank can form a complete plane.

[0010] As a further technical solution of this utility model, when the rotating substrate is in a horizontal state, the level of the pickling solution in the pickling tank is lower than the lower end surface of the rotating substrate.

[0011] As a further technical solution of this utility model, the rotating substrate has a hollow structure.

[0012] As a further technical solution of this utility model, the inner diameter of the salvage gap is smaller than the outer diameter of the casting.

[0013] As a further technical solution of this utility model, the arm is coaxial with its rotation center, and its central angle is greater than 45° and less than 90°.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) In this application, the casting is put into and retrieved by rotating the rotating part, and the workers do not need to directly contact the pickling liquid throughout the process. When the rotating base plate is in a horizontal state, the pickling liquid level is lower than its lower end surface. Combined with the hollow structure, the residual acid liquid in the casting can be effectively drained, avoiding workers from contacting corrosive liquid when picking up and putting down the casting, and significantly improving the safety of operation.

[0016] (2) In this application, the rotating part is equipped with two sets of symmetrical retrieval claws, which can realize continuous processing of batch castings and greatly shorten the waiting time; the retrieval arm drives the casting to tumble in the pickling tank, increasing the contact area of ​​the pickling liquid and ensuring comprehensive pickling. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the pickling device for water supply pipeline valve castings is shown.

[0018] Figure 2 A schematic diagram of the pickling tank structure is shown;

[0019] Figure 3 A schematic diagram of the rotating part is shown;

[0020] Figure 4 A schematic diagram of the internal structure of the acid pickling device for water pipe valve castings is shown.

[0021] Legend:

[0022] 100, pickling tank; 110, pickling trough; 120, step; 130, retrieval gap; 200, rotating part; 210, rotating base plate; 220, drive motor; 230, retrieval arm. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0024] Figure 1 A schematic diagram of the overall structure of the pickling device for water supply pipeline valve castings is shown. Figure 1 The pickling device for water pipe valve castings includes a pickling tank 100 and a rotating part 200 rotatably disposed in the pickling tank 100. The pickling tank 100 contains pickling solution. The worker places the casting to be pickled on the surface of the rotating part 200. As the rotating part 200 rotates, the casting falls into the pickling tank 100 and is immersed in the pickling solution. The casting remains on the surface of the rotating part 200 after the rotating part 200 has rotated one full turn. The worker can then remove the pickled parts from the surface of the rotating part 200. The entire process does not require the worker to come into contact with the pickling solution, and the workpiece is smoothly entered into the pickling solution for cleaning and then smoothly removed, effectively preventing the pickling solution from splashing out.

[0025] Figure 2 A schematic diagram of the pickling tank 100 is shown; Figure 3 A schematic diagram of the rotating part 200 is shown; Figure 4 A schematic diagram of the internal structure of the pickling device for water pipe valve castings is shown. Figures 2-4 In the pickling tank 100, the top of the pickling tank 100 has a concave pickling groove 110. The rotating part 200 includes a rotating base plate 210 rotatably disposed in the pickling groove 110, and the rotation center of the rotating base plate 210 is coaxial with the pickling groove 110. This is to enable the rotating base plate 210 to rotate at the center position of the pickling groove 110, avoiding interference between the edge of the rotating base plate 210 and the inner wall of the pickling groove 110 during the rotation process. Furthermore, driven by the rotation of the rotating base plate 210, the parts can tumble in the pickling groove 110 to increase the contact area and achieve comprehensive pickling of the casting.

[0026] It should be noted that the rotating substrate 210 has a hollow structure, allowing the pickling solution to flow through the rotating substrate 210 and preventing the rotating substrate 210 from draining water during rotation. When the rotating substrate 210 is in a horizontal state, the level of the pickling solution in the pickling tank 110 is lower than the lower end surface of the rotating substrate 210, so that the rotating substrate 210 does not come into contact with the pickling solution when in a horizontal state. Combined with the hollow structure mentioned above, on the one hand, the pickling solution remaining on the parts can be drained, and on the other hand, it can effectively prevent workers from coming into contact with the pickling solution when placing / removing castings.

[0027] In this embodiment, a drive motor 220 is installed on the pickling tank 100. The output end of the drive motor 220 is connected to the rotating base plate 210. Starting the drive motor 220 can drive the rotating base plate 210 to rotate. However, in some other embodiments, a cylinder and a gear rack structure can also be used to achieve this. That is, the drive motor 220 is not a limitation of this application.

[0028] The pickling tank 110 has several sets of steps 120 along its length to form a support surface for the casting. There is a gap between two adjacent steps 120 to form a retrieval gap 130. The side end of the rotating base plate 210 is provided with a retrieval arm 230 extending in the rotation direction. Several sets of retrieval claws are arranged at intervals along the length of the rotating base plate 210. The retrieval claws extend into the retrieval gap 130 as the rotating base plate 210 rotates and retrieve the casting. Since the retrieval claws extend into the retrieval gap 130, the free end of the retrieval arm 230 will not interfere with the casting when it passes through the bottom of the casting until the casting is wrapped at the connection between the retrieval arm 230 and the rotating base plate 210. As the rotating base plate 210 rotates, the casting is picked up by the retrieval arm 230, which prevents the casting from being thrown out by the rotational force of the rotating base plate 210 at the moment of exiting the water, and ensures that the casting remains on the surface of the rotating base plate 210 after exiting the water.

[0029] It should be noted that the inner diameter of the retrieval gap 130 is smaller than the outer diameter of the casting; the outer diameter of the casting here refers to the shortest outer diameter, in order to prevent the casting from falling into or getting stuck in the retrieval gap 130 and blocking the retrieval by the retrieval arm 230.

[0030] It should also be noted that the retrieval arm 230 is coaxial with its rotation center, and its central angle is greater than 45° and less than 90°; the angle greater than 45° allows the retrieval claw to hold the casting during retrieval, while the angle less than 90° ensures that the retrieval claw will not affect the worker's placement / retrieval of the casting.

[0031] Preferably, the retrieval claws are provided in two sets, respectively connected to the two sides of the rotating base plate 210, and the two are symmetrical about the center of rotation. That is, when a batch of castings is pickled in the pickling tank 110, the rotating base plate 210 can hold the second batch of castings. After the first batch of castings is pickled, the rotating base plate 210 only needs to rotate 180° to reverse the positions of the two batches of castings. That is, the first batch of pickled castings is placed on the rotating base plate 210, and the second batch of castings that have not yet been pickled is immersed in the pickling tank 110 for pickling, which doubles the efficiency of batch pickling of castings.

[0032] It should be noted that the rotating part 200 is configured to perform intermittent flipping motion to achieve continuous pickling of the casting.

[0033] When the rotating base plate 210 is in a horizontal state, it can form a complete plane with the pickling tank 100; when the worker puts / removes the casting, the casting can slide between the rotating base plate 210 and the pickling tank 100.

[0034] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A pickling device for castings of water pipe valves, characterized in that, include: Pickling tank (100), the top of the pickling tank (100) has a concave pickling tank (110), the pickling tank (110) has several sets of steps (120) along its length to form a support surface for the casting, and there is a gap between two adjacent steps (120) to form a salvage gap (130). A rotating part (200) is rotatably disposed in the pickling tank (110), and the rotation center of the rotating part (200) is coaxial with the pickling tank (110). The rotating part (200) includes a rotating base plate (210). The edge of the rotating base plate (210) matches the shape of the inner wall of the pickling tank (110). A scooping arm (230) extending along the rotation direction is provided on the side end of the rotating base plate (210). Several sets of scooping arms (230) are arranged at intervals along the longitudinal direction of the rotating base plate (210) to form scooping claws. The scooping claws extend into the scooping gap (130) and scoop up the casting as the rotating base plate (210) rotates.

2. The pickling device for castings of water pipe valves according to claim 1, characterized in that: The retrieval claws are provided in two sets, which are respectively connected to the two sides of the rotating base plate (210), and the two are symmetrical about the center of rotation.

3. The pickling device for water pipe valve castings according to claim 2, characterized in that, When the rotating substrate (210) is in a horizontal state, the rotating substrate (210) and the pickling tank (100) can form a complete plane.

4. The pickling device for castings of water pipe valves according to claim 2, characterized in that: When the rotating substrate (210) is in a horizontal state, the level of the pickling solution in the pickling tank (110) is lower than the lower end face of the rotating substrate (210).

5. The pickling device for castings of water supply pipeline valves according to claim 4, characterized in that: The rotating substrate (210) has a hollow structure.

6. The pickling device for castings of water pipe valves according to claim 1, characterized in that: The inner diameter of the salvage gap (130) is smaller than the outer diameter of the casting.

7. The pickling device for castings of water pipe valves according to claim 1, characterized in that: The arm (230) is coaxial with its rotation center, and its central angle is greater than 45° and less than 90°.

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