Universal pressure leakage test device for thermostat housing

Abstract

The present invention relates to the technical field of thermostat processing, and particularly relates to a universal pressure leakage testing device for a thermostat housing, which includes a bottom plate, a top plate, a replaceable support seat, a plurality of ejector rods, a lifting seat, a replaceable pressing block, and a plurality of plugs. The replaceable support seat includes a support block for supporting the bottom surface of the lower housing, an integral sealing bottom plate for sealing the bottom surface of the housing, and an upper housing sealing bottom plate for sealing the bottom surface of the upper housing. The integral sealing bottom plate is provided with a first air inlet for inflating the workpiece. The replaceable pressing block includes a replaceable arc-shaped pressing block for pressing above the housing or above the upper housing, and a sealing cover plate for sealing the upper surface of the lower housing. One of the plugs is provided with a second air inlet. The present invention can respectively perform sealing detection on the existing thermostat housing and the improved thermostat housing. During use, each hole of the housing is blocked, gas is filled, and it is placed in water to detect bubbles. It is convenient to use and has strong versatility.

Description

Technical Field

[0001] The present invention relates to the technical field of thermostat processing, and particularly to a universal pressure leakage testing device for a thermostat housing. Background Art

[0002] An automotive thermostat is a valve that controls the flow path of the engine coolant. It automatically adjusts the amount of water entering the radiator according to the coolant temperature to ensure that the engine operates within an appropriate temperature range, and can play roles such as energy conservation. The structure of the thermostat housing is very complex. As Figure 1 shown in a conventional thermostat housing, it has two independent cavities inside, an irregular outer surface shape, and multiple holes communicating with the internal cavities. A relatively large hole is opened at its bottom surface for assembling other accessories of the thermostat inside the housing. Figure 2 Another thermostat housing developed by our company is a split type, including an upper housing and a lower housing. The two are connected by a flange in the middle and other parts are assembled from the middle joint. Therefore, the bottom of the lower housing of this thermostat housing is closed. For Figure 1 and Figure 2 the two types of thermostat housings, our company currently produces them simultaneously, which makes it more complicated to detect them, and the testing device cannot be universal. Summary of the Invention

[0003] The purpose of the present invention is to provide a universal pressure leakage testing device for a thermostat housing aiming at the deficiencies of the prior art. It can be used for the airtightness detection of the integral and split types of two kinds of thermostat housings, has strong universality and is convenient to use.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a universal pressure leakage testing device for a thermostat housing, including a bottom plate and a top plate. The top plate is fixedly arranged above the bottom plate through columns. The bottom plate is provided with a replaceable support seat and several ejector rods. An elevating seat is arranged above the replaceable support seat. The elevating seat is connected to the top plate through a cylinder. A replaceable pressing block is connected below the elevating seat. Several plugs for blocking the surface of the thermostat housing are arranged on the side of the replaceable support seat;

[0005] The replaceable support seat includes a support block for supporting the bottom surface of the lower housing, an integral sealing bottom plate for blocking the bottom surface of the housing, and an upper housing sealing bottom plate for blocking the bottom surface of the upper housing. The integral sealing bottom plate and the upper housing sealing bottom plate are slidably sleeved outside the support block in a replaceable manner. The integral sealing bottom plate is provided with a first air inlet for inflating air into the workpiece;

[0006] The replaceable pressing block includes a replaceable arc-shaped pressing block for pressing above the housing or above the upper housing, and a sealing cover plate for blocking the upper surface of the lower housing;

[0007] The plug includes a plurality of upper plugs and a plurality of lower plugs. The upper plugs are connected to the top plate by cylinders, and the lower plugs are connected to the bottom plate by cylinders. One of the upper plugs is provided with a second air inlet hole.

[0008] Preferably, the plug includes a plurality of upper plugs and five lower plugs.

[0009] Preferably, a plurality of pressing devices for pressing the workpiece against the replaceable support seat are arranged on the side surface of the replaceable support seat.

[0010] Preferably, the upper surface of the support block is a plane and its side surface is an arc surface.

[0011] Preferably, a circular boss is arranged in the middle of the upper surface of the integral sealing bottom plate, and a sealing ring is arranged at the root of the boss.

[0012] The beneficial effect of the present invention is: A universal pressure leakage testing device for a thermostat housing, which uses replaceable replaceable support seats and replaceable pressing blocks, can perform four detections, namely the sealing detection of the overall thermostat housing in the prior art, the sealing detection of the upper housing of the newly developed split thermostat housing, the sealing detection of the lower housing of the newly developed split thermostat housing, and the sealing detection after the assembly of the newly developed split thermostat housing. It is convenient to use and has strong versatility. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of a thermostat housing for testing in the present invention.

[0014] Figure 2 is a schematic structural diagram of the upper housing and the lower housing of another thermostat housing for testing in the present invention.

[0015] Figure 3 is a schematic structural diagram of an embodiment of the universal pressure leakage testing device for a thermostat housing in the present invention.

[0016] Figure 4 is Figure 3 a schematic structural diagram of the working state of the universal pressure leakage testing device for a thermostat housing in

[0017] Figure 5 is Figure 3 a disassembled schematic diagram of the replaceable support seat in

[0018] Figure 6 is Figure 5 a schematic structural diagram of replacing the integral sealing bottom plate with the upper shell sealing bottom plate in

[0019] Figure 7 It is a schematic structural diagram of a plug with a second air inlet hole.

[0020] Figure 8 is Figure 3 a schematic structural diagram of the arc-shaped pressing block in

[0021] Figure 9 a schematic structural diagram of a sealing cover plate.

[0022] Explanation of reference numerals in the drawings:

[0023] 1 - bottom plate 2 - top plate

[0024] 3 - column 4 - replaceable support seat

[0025] 41 - support block 42 - integral sealing bottom plate

[0026] 421 - first air inlet hole 43 - upper shell sealing bottom plate

[0027] 5 - ejector rod 6 - lifting seat

[0028] 61 - arc-shaped pressing block 62 - sealing cover plate

[0029] 7 - plug 711 - second air inlet hole

[0030] 71 - upper plug 72 - lower plug

[0031] 8 - pressing device. Detailed implementation manners

[0032] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments, and the implementation scope of the present invention is not limited thereto.

[0033] As Figures 1 to 8 shown, the universal pressure leakage test device for a thermostat housing in this embodiment includes a bottom plate 1 and a top plate 2. The top plate 2 is fixedly arranged above the bottom plate 1 through columns 3. The bottom plate 1 is provided with a replaceable support seat 4 and a plurality of ejector rods 5. An upper lifting seat 6 is arranged above the replaceable support seat 4. The lifting seat 6 is connected to the top plate 2 through a cylinder. A replaceable pressing block is connected below the lifting seat 6. A plurality of plugs 7 for plugging the surface of the thermostat housing are arranged on the side of the replaceable support seat 4. Among them, the replaceable support seat 4 is used to support (seal) the workpiece from below. As Figure 4 in, for Figure 1 workpieces, the replaceable support seat 4 is used Figure 5The structure supports the workpiece from the bottom while sealing it. The lifting seat 6 drives the replaceable pressure block to press the workpiece from above, and each plug 7 closes the other holes. Then it is placed in water, and air is filled into the two cavities of the workpiece through the following first air inlet hole 421 and second air inlet hole 711, and then bubbles are observed above. Thus, the sealing performance of the thermostat housing in the prior art can be detected.

[0034] The ejector rod 5 corresponds to the blind hole at the bottom of the workpiece, which is used to support the workpiece and position the workpiece.

[0035] For Figure 2 workpieces, it needs to be detected three times. The upper housing and the lower housing are detected respectively, and then they are assembled and detected again. The difference from the existing thermostat housing above is that the height of the workpiece is different and the holes to be sealed are different. Therefore, in this embodiment, the replaceable support seat 4 and the replaceable pressure block are replaced to make the positions of the lower housing and the upper housing basically the same as those in 4 respectively, and then each hole is blocked, and air is filled into the cavity for detection. This device has strong versatility and is convenient and fast for detection.

[0036] Specifically, the replaceable support seat 4 includes a support block 41 for supporting the bottom surface of the lower housing, an integral sealing bottom plate 42 for blocking the bottom surface of the housing ( Figure 5 ), an upper housing sealing bottom plate 43 for blocking the bottom surface of the upper housing ( Figure 6 ). The integral sealing bottom plate 42 and the upper housing sealing bottom plate 43 are slidably sleeved on the outside of the support block 41 in a replaceable manner, and the integral sealing bottom plate 42 is provided with a first air inlet hole 421 for inflating air into the workpiece.

[0037] The replaceable pressure block includes a replaceable arc-shaped pressure block 61 for pressing the upper part of the housing or the upper part of the upper housing ( Figure 8 ), and a sealing cover plate 62 for blocking the upper surface of the lower housing ( Figure 9 ).

[0038] The plug 7 includes a plurality of upper plugs 71 and a plurality of lower plugs 72. The upper plugs 71 are connected to the top plate 2 through cylinders, and the lower plugs 72 are connected to the bottom plate 1 through cylinders. One of the upper plugs 71 is provided with a second air inlet hole 711 ( Figure 7 ).

[0039] The plug 7 includes a plurality of upper plugs 71 and five lower plugs 72.

[0040] A plurality of pressing devices 8 for pressing the workpiece against the replaceable support seat 4 are arranged on the side of the replaceable support seat 4.

[0041] Such as Figure 5 、 Figure 6As shown, the upper surface of the support block 41 is a plane, and its side surface is an arc surface. It is preferably U-shaped, and the middle is empty for placing the air pipe to inflate the workpiece cavity. The arc surface of the support block 41 can position the integral sealing bottom plate 42 and the upper shell sealing bottom plate 43.

[0042] In this embodiment, the surfaces of the plug 7 for sealing each hole of the workpiece, the integral sealing bottom plate 42, the sealing cover plate 62, etc. are all provided with sealing members, such as sealing rings or rubber gaskets. If the shape of the hole of the workpiece is flat, such as the plug 7 and the integral sealing bottom plate 42 are provided with circular bosses in the middle and extend into the hole. If there is a boss on the end face of the hole of the workpiece, such as the lower end face of the upper shell, then as Figure 6 As shown, the upper shell sealing bottom plate 43 is provided with a circular groove.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. Universal pressure leakage test device for thermostat housing, characterized in that: It includes a bottom plate (1) and a top plate (2). The top plate (2) is fixedly arranged above the bottom plate (1) through columns (3). The bottom plate (1) is provided with a replaceable support seat (4) and a plurality of ejector rods (5). Above the replaceable support seat (4), there is a lifting seat (6). The lifting seat (6) is connected to the top plate (2) through a cylinder. Below the lifting seat (6), there is a replaceable pressing block connected. On the side of the replaceable support seat (4), there are a plurality of plugs (7) for plugging the surface of the thermostat housing. The replaceable support seat (4) includes a support block (41) for supporting the bottom surface of the lower housing, an integral sealing bottom plate (42) for plugging the bottom surface of the housing, and an upper housing sealing bottom plate (43) for plugging the bottom surface of the upper housing. The integral sealing bottom plate (42) and the upper housing sealing bottom plate (43) are slidably sleeved on the outside of the support block (41) in a replaceable manner. The integral sealing bottom plate (42) is provided with a first air inlet hole (421) for inflating the workpiece. The replaceable pressing block includes a replaceable arc-shaped pressing block (61) for pressing above the housing or above the upper housing, and a sealing cover plate (62) for plugging the upper surface of the lower housing. The plug (7) includes a plurality of upper plugs (71) and a plurality of lower plugs (72). The upper plugs (71) are connected to the top plate (2) through a cylinder, and the lower plugs (72) are connected to the bottom plate (1) through a cylinder. One of the upper plugs (71) is provided with a second air inlet hole (711).

2. The universal pressure leakage test device for a thermostat housing according to claim 1, characterized in that: The plug (7) includes a plurality of upper plugs (71) and five lower plugs (72).

3. The general pressure leakage test device for a thermostat housing according to claim 1, characterized in that: On the side of the replaceable support seat (4), there are a plurality of pressing devices (8) for pressing the workpiece on the replaceable support seat (4).

4. The general pressure leakage test device for a thermostat housing according to claim 1, characterized in that: The upper surface of the support block (41) is a plane, and its side surface is an arc surface.

5. The universal pressure leakage test device for a thermostat housing according to claim 1, characterized in that: In the middle of the upper surface of the integral sealing bottom plate (42), there is a circular boss, and a sealing ring is arranged at the root of the boss.

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