A vacuum mechanism for a transformer shell forming raw material tank

Abstract

The utility model belongs to raw material tank vacuumizing mechanism field, concretely relates to a mutual -inductor shell forming raw material tank vacuumizing mechanism, including vacuum pump and primary filter, the primary filter includes the filter core of shell and setting in the shell, the shell is provided with first air inlet and first air outlet respectively, first air inlet is connected with raw material tank through the air pipe, first air outlet is communicated with vacuum pump through the exhaust pipe, the key lies in, first air inlet is located in the shell lower extreme, the shell lower extreme still is provided with the storage warehouse of being located below the filter core, the storage warehouse is provided with the switchable discharge gate, the storage warehouse and first air inlet are located the same side of the filter core, this vacuumizing mechanism can delay the blockage of filter core, and effectively filter air, reduce the replacement frequency of filter core and the cleaning frequency of vacuum pump, reduce production cost.

Description

Technical Field

[0001] This utility model belongs to the field of raw material tank vacuuming mechanism, specifically relating to a vacuuming mechanism for a material tank forming a current transformer shell. Background Technology

[0002] During the casting process of the current transformer housing, the raw material tank needs to be evacuated to eliminate air bubbles and obtain a uniform and defect-free product.

[0003] In actual production, it was found that the resin in the raw material tank would atomize during the vacuuming process, forming tiny droplets in the air that would flow into the filter. Alternatively, insufficient airflow in the filter element or a large negative pressure in the raw material tank could draw the resin out, causing further blockage of the filter element. More importantly, the filters on existing instrument transformer production lines typically use a "top-in, bottom-out" airflow path. Under the influence of gravity and inertia, resin droplets easily deposit at the bottom of the filter and quickly adhere to the surface of the filter element, reducing the filtration efficiency of the filter element. Impurities can easily enter the vacuum pump, resulting in a high frequency of filter element replacement and frequent cleaning of the vacuum pump. Furthermore, the hardened resin increases the difficulty of cleaning, which is detrimental to production cost control. Utility Model Content

[0004] In order to solve the problems existing in the prior art, this utility model provides a vacuuming mechanism for the raw material tank of transformer shell forming, which can delay the clogging of the filter element, effectively filter the air, reduce the replacement frequency of the filter element and the cleaning frequency of the vacuum pump, and reduce production costs.

[0005] The specific technical solution adopted in this utility model is as follows:

[0006] A vacuuming mechanism for a raw material tank for forming a transformer housing includes a vacuum pump and a primary filter. The primary filter includes a housing and a filter element disposed within the housing. The housing is provided with a first air inlet and a first air outlet. The first air inlet is connected to the raw material tank via an air inlet pipe, and the first air outlet is connected to the vacuum pump via an air outlet pipe. Crucially, the first air inlet is located at the lower end of the housing, and a storage compartment is also provided at the lower end of the housing below the filter element. The storage compartment is provided with an openable discharge port, and the storage compartment and the first air inlet are located on the same side of the filter element.

[0007] The first air intake end is connected to the air intake pipe via a connector, and the storage compartment is connected to the lower end of the connector. The first air intake end, the air intake pipe, and the storage compartment are arranged sequentially from high to low along the connector.

[0008] The storage compartment is equipped with a valve, and the discharge port has the freedom to be opened and closed thanks to the valve.

[0009] The filter element has a tubular structure, the first air inlet end is corresponding to the inner hole of the filter element, and the storage compartment is located below the inner hole of the filter element.

[0010] The first air outlet is located at the upper end of the housing.

[0011] A secondary filter is also installed between the exhaust pipe and the vacuum pump.

[0012] The second air inlet is located at the upper end of the secondary filter, and the second air outlet is located at the lower end of the secondary filter.

[0013] The beneficial effects of this utility model are:

[0014] This utility model places the first air inlet end at the lower end of the housing and adds a storage compartment at the lower end of the housing. The storage compartment and the first air inlet end are located on the same side of the filter element. Impurities carried in the air are intercepted by the filter element. Due to the influence of gravity, some of the intercepted impurities will fall downward into the storage compartment and be collected, thereby separating some impurities from the filter element, reducing the amount of impurities accumulated at the bottom of the filter element, avoiding large-area blockage of the filter element, and facilitating the cleaning of impurities. Opening the discharge port can quickly discharge the impurities collected in the storage compartment.

[0015] The first air outlet is located at the top of the housing, realizing the "bottom in, top out" path of air in the primary filter, allowing the air to have a large contact area with the filter element, avoiding direct impact of resin droplets on the surface of the filter element, and achieving effective filtration.

[0016] The second air inlet is located at the top of the secondary filter, and the second air outlet is located at the bottom of the secondary filter. The top of the secondary filter directly receives the upward airflow from the primary filter, reducing pressure changes caused by airflow reversal, making the airflow of the entire vacuum mechanism smoother, and reducing the load on the vacuum pump. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the assembly of the primary and secondary filters;

[0019] Figure 3 This is a schematic diagram of the structure of a primary filter;

[0020] In the attached diagram, 1 is a vacuum pump, 2 is an air inlet pipe, 3 is a primary filter, 4 is a housing, 5 is a filter element, 6 is a first air inlet, 7 is a first air outlet, 8 is a storage compartment, 9 is a valve, 10 is a resin A tank, 11 is a resin B tank, 12 is a second air inlet, 13 is a second air outlet, 14 is a secondary filter, 15 is a connector, and 16 is an exhaust pipe. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0022] Specific implementation examples Figure 1 , Figure 2 As shown, this utility model relates to a vacuum pumping mechanism for a raw material tank used in the molding of a current transformer housing, comprising a vacuum pump 1 and a primary filter 3; as shown Figure 3 As shown, the primary filter 3 includes a housing 4 and a filter element 5 disposed within the housing 4. The housing 4 is provided with a first air inlet 6 and a first air outlet 7. The first air inlet 6 is connected to the raw material tank via an air inlet pipe 2, and the first air outlet 7 is connected to the vacuum pump 1 via an exhaust pipe 16. Crucially, the first air inlet 6 is located at the lower end of the housing 4. The lower end of the housing 4 is also provided with a storage compartment 8 located below the filter element 5. The storage compartment 8 is provided with an openable discharge port. The storage compartment 8 and the first air inlet 6 are located on the same side of the filter element 5.

[0023] The first air inlet 6 is located at the lower end of the housing 4, and a storage chamber 8 is added at the lower end of the housing 4. The storage chamber 8 and the first air inlet 6 are located on the same side of the filter element 5. When vacuuming is performed, the vacuum pump 1 is turned on. The air in the raw material tank passes through the first-stage filter 3 along the air inlet pipe 2. The air enters one side of the filter element 5 inside the housing 4 along the first air inlet 6 and diffuses to the other side of the filter element 5. During the process of passing through the filter element 5, the impurities carried in the air are intercepted by the filter element 5. Due to the influence of gravity, some of the intercepted impurities will fall down to the bottom of the housing 4 and fall into the storage chamber 8 for collection. This achieves the separation of some impurities from the filter element 5, reduces the amount of impurities accumulated at the bottom of the filter element 5, avoids large-area blockage of the filter element 5, and facilitates the cleaning of impurities. The impurities collected in the storage chamber 8 can be quickly discharged by opening the discharge port.

[0024] Gravity settling also helps to separate some of the larger resin liquids in the impurities in advance, preventing the resin liquid from directly impacting the surface of filter element 5 and reducing the risk of filter element 5 adhesion.

[0025] Since the storage compartment 8 and the first air inlet 6 are located on the same side of the filter element 5, the impurities filtered by the filter element 5 do not need to pass through the filter element 5 when entering the storage compartment 8. This achieves effective collection of impurities while avoiding the clogging of the filter element 5 caused by impurities being forced to pass through it.

[0026] This embodiment can effectively reduce the frequency of filter element 5 clogging, improve the service life of filter element 5, ensure the filtration effect of filter element 5 during operation, reduce the replacement frequency of filter element 5, prevent impurities from entering vacuum pump 1 and affecting the normal operation of vacuum pump 1, prevent the formation of resin film in vacuum pump 1, and reduce the maintenance difficulty of vacuum pump 1.

[0027] Preferably, the first air inlet 6 is connected to the air inlet pipe 2 via connector 15, and the storage compartment 8 is connected to the lower end of connector 15. The storage compartment 8 is installed at the lower end of the housing 4 via connector 15. The first air inlet 6, air inlet pipe 2, and storage compartment 8 are arranged sequentially from high to low along connector 15. The storage compartment 8 can be a separate accessory, or connector 15 can be a T-shaped three-way connector. The upper opening of the three-way connector is connected to the first air inlet 6, and the middle opening is connected to the air inlet pipe 2. The cavity below the middle opening is used as the storage compartment 8, and the bottom of the cavity is sealed. The air entering the primary filter 3 and the impurities falling both enter and exit only along the first air inlet 6, and the height of the storage compartment 8 is lower than that of the air inlet pipe 2. Impurities settle at the lower end of the housing 4 and fall into the storage compartment 8 along connector 15 for effective collection, preventing impurities from sliding into the air inlet pipe 201 after vacuuming is completed and the machine is stopped.

[0028] The storage bin 8 is equipped with a valve 9, which enables the quick opening and closing of the discharge port. The storage bin 8 is sealed by the valve 9, and the discharge port is located at the bottom of the storage bin 8. After the vacuuming process is completed, the valve 9 is opened, and the impurities in the storage bin 8 are discharged along the discharge port under the action of gravity, thus achieving convenient material discharge.

[0029] In this embodiment, the filter element 5 is a tubular structure, the first air inlet end 6 is correspondingly set with the inner hole of the filter element 5, and the storage compartment 8 is located below the inner hole of the filter element 5.

[0030] The first air outlet 7 is located at the upper end of the housing 4. The first air outlet 7 is located at the upper end of the side wall of the housing 4 and communicates with the outer side of the filter element 5, realizing the "bottom in and top out" path of air in the primary filter 3, so that the air can have a large area of ​​contact with the filter element 5, avoiding the direct impact of resin droplets on the surface of the filter element 5, and achieving effective filtration.

[0031] like Figure 1 As shown, the raw material tanks include resin tank A 10 and resin tank B 11. Resin tank A 10 and resin tank B 11 are each connected to a primary filter 3 via an air inlet pipe 2. A secondary filter 14 is also installed between the exhaust pipe 16 and the vacuum pump 1. The exhaust pipe 16 is a T-junction pipe, with the second air inlet 12 connected to the first air outlet 6 on the two primary filters 3 via the T-junction pipe. The second air outlet 13 of the secondary filter 14 is connected to the vacuum pump 1. Resin tank A 10 and resin tank B 11 share a single secondary filter 14, reducing the number of secondary filters 14 required.

[0032] Air passes through primary filter 3 and secondary filter 14 sequentially before entering vacuum pump 1 and being discharged, effectively improving the cleanliness of the air and further preventing impurities from entering vacuum pump 1. Since primary filter 3 can filter out most of the impurities in the air, secondary filter 14 performs uniform and fine filtration on the air after removing most of the impurities, reducing cost while ensuring filtration effectiveness.

[0033] The secondary filter 14 includes a second housing and a tubular second filter element disposed within the second housing. The second inlet 12 is disposed at the upper end of the side wall of the second housing of the secondary filter 14, and the second outlet 13 is disposed at the lower end of the secondary filter 14, corresponding to the inner hole of the second filter element. Air moves from the upper end of the primary filter 3 to the upper end of the secondary filter 14. The secondary filter 14 directly receives the upward airflow in the primary filter 3, reducing the pressure change caused by the airflow turning, making the airflow of the entire vacuum mechanism smoother and reducing the load on the vacuum pump 1. On the other hand, the air inlet of the vacuum pump 1 is usually located at the bottom, and the second outlet 13 being located at the lower end of the secondary filter 14 can shorten the length of the pipeline between the second outlet 13 and the vacuum pump 1.

Claims

1. A vacuum pumping mechanism for a raw material tank for forming a transformer housing, comprising a vacuum pump (1) and a primary filter (3), wherein the primary filter (3) comprises a housing (4) and a filter element (5) disposed within the housing (4), wherein the housing (4) is provided with a first air inlet (6) and a first air outlet (7), the first air inlet (6) being connected to the raw material tank via an air inlet pipe (2), and the first air outlet (7) being connected to the vacuum pump (1) via an exhaust pipe (16), characterized in that: The first air inlet (6) is located at the lower end of the housing (4). The lower end of the housing (4) is also provided with a storage compartment (8) located below the filter element (5). The storage compartment (8) is provided with an openable discharge port. The storage compartment (8) and the first air inlet (6) are located on the same side of the filter element (5).

2. The vacuum mechanism for a transformer housing forming raw material tank according to claim 1, characterized in that: The first air inlet (6) is connected to the air inlet pipe (2) via a connector (15), and the storage compartment (8) is connected to the lower end of the connector (15). The first air inlet (6), the air inlet pipe (2), and the storage compartment (8) are arranged sequentially from high to low along the connector (15).

3. The mechanism for vacuumizing a raw material tank for forming a transformer case according to claim 1, characterized in that: The storage compartment (8) is equipped with a valve (9), and the discharge port has the freedom to be opened and closed by means of the valve (9).

4. The mechanism for vacuumizing a raw material tank for forming a transformer case according to claim 1, characterized in that: The filter element (5) is a tubular structure, the first air inlet (6) is correspondingly arranged with the inner hole of the filter element (5), and the storage compartment (8) is located below the inner hole of the filter element (5).

5. The mechanism for evacuating a raw material tank for forming a transformer case according to claim 1, characterized in that: The first air outlet (7) is located at the upper end of the housing (4).

6. The mechanism for vacuumizing a raw material tank for forming a transformer case according to claim 1, characterized in that: A secondary filter (14) is also provided between the exhaust pipe (16) and the vacuum pump (1). The secondary filter (14) is provided with a second air inlet (12) and a second air outlet (13). The second air inlet (12) is connected to the first air outlet (7) via the exhaust pipe (16), and the second air outlet (13) is connected to the vacuum pump (1).

7. The transformer shell forming raw material tank vacuumizing mechanism according to claim 6, characterized in that: The second air inlet (12) is located at the upper end of the secondary filter (14), and the second air outlet (13) is located at the lower end of the secondary filter (14).

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