Liquid injection clamp and pressure resistance detection device

Abstract

The invention belongs to the technical field of positioning clamps, and discloses a liquid injection clamp and a pressure resistance detection device. The liquid injection clamp comprises a clamping unit, the clamping unit comprises a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged in a spaced mode, and a workpiece to be subjected to liquid injection is clamped between the first clamping piece and the second clamping piece. The second clamping piece is provided with a liquid injection hole, the liquid injection hole is communicated with the inner flow channel of the workpiece, and liquid flows in or out of the inner flow channel through the liquid injection hole. The liquid injection clamp comprises at least two clamping units, the liquid injection hole of one clamping unit is communicated with the liquid inlet of the inner flow channel, and the liquid injection hole of the other clamping unit is communicated with the liquid outlet of the inner flow channel. The liquid injection clamp can ensure the stability of a workpiece when liquid is injected into the workpiece, improves the liquid injection effect, and is simple in structure and easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of positioning fixtures, and in particular to a liquid injection fixture and a pressure resistance detection device. Background Art

[0002] With the development of aerospace, automobile, navigation and other fields, the requirements for high-performance equipment such as aircraft engines, automobile engines, gas turbines, etc. are increasing. Therefore, more and more workpieces with more extreme working conditions and more complex structures containing inner cavities and inner flow channels have been developed. The production process of these workpieces is often more sophisticated and demanding, and at the same time, the added value of the workpieces is also higher. Among these workpieces, many need to work for a long time under high temperature and high pressure. Therefore, the pressure resistance test of the inner flow channel of the workpiece is a key step in checking whether the workpiece is qualified or not.

[0003] However, in the prior art, due to the different shapes of the workpieces and the lack of corresponding matching fixtures for fixing, the stability of the workpiece cannot be guaranteed when injecting liquid into the flow channel inside the workpiece, and the injection often leads to liquid leakage, making it difficult to perform stable testing of the pressure resistance of the workpiece, and thus there is a lack of effective means to determine the applicability of the workpiece during the development and use and maintenance of the workpiece.

[0004] Therefore, there is an urgent need for a liquid injection fixture and a pressure resistance detection device to solve the above problems. Summary of the invention

[0005] An object of the present invention is to provide a liquid injection fixture which can stably clamp a workpiece when injecting liquid into an inner flow channel of the workpiece, has a simple structure and is easy to operate.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A liquid injection fixture is provided, comprising:

[0008] A clamping unit, the clamping unit comprising a first clamping member and a second clamping member, the first clamping member and the second clamping member are arranged at an interval, and the workpiece to be injected with liquid is clamped between the first clamping member and the second clamping member;

[0009] The second clamping member is provided with a liquid injection hole, the liquid injection hole is communicated with the inner flow channel of the workpiece, and the liquid injection hole is used for liquid to flow into or out of the inner flow channel;

[0010] The liquid injection fixture comprises at least two clamping units, wherein the liquid injection hole of one of the clamping units is connected to the liquid inlet of the inner flow channel, and wherein the liquid injection hole of another clamping unit is connected to the liquid outlet of the inner flow channel.

[0011] As an optional solution of the liquid injection fixture, the liquid injection fixture further includes a sealing ring, and the sealing ring is connected to a side of the second clamping member facing the workpiece.

[0012] As an optional solution of the liquid injection fixture, the second clamping member is further provided with a sealing groove, the sealing groove is provided on a side of the second clamping member facing the workpiece, and the sealing ring is provided in the sealing groove.

[0013] As an optional solution of the liquid injection fixture, the second clamping member further includes a buffer cavity, the buffer cavity is connected to one end of the liquid injection hole facing the workpiece, and the cross-sectional area of ​​the buffer cavity is larger than the cross-sectional area of ​​the liquid injection hole.

[0014] As an optional solution of the liquid injection fixture, the liquid injection fixture further includes a positioning piece, and the positioning piece can be penetrated through the liquid injection hole and extend into the inner flow channel.

[0015] As an optional solution of the liquid injection fixture, the first clamping member includes a first contact surface, the first contact surface abuts against the workpiece, and the shape of the first contact surface matches a surface of the workpiece facing the first clamping member.

[0016] As an optional solution of the liquid injection fixture, the second clamping member includes a second contact surface, the second contact surface abuts against the workpiece, and the shape of the second contact surface matches a surface of the workpiece facing the second clamping member.

[0017] As an optional solution of the liquid injection clamp, the liquid injection clamp further includes a connecting member, wherein the connecting member is connected to the first clamping member and the second clamping member, and the connecting member is used to drive the first clamping member and the second clamping member to move closer to or away from each other.

[0018] Another object of the present invention is to provide a pressure resistance detection device that can stably clamp the workpiece when injecting liquid into the inner flow channel of the workpiece, thereby improving the pressure resistance detection accuracy of the workpiece.

[0019] To achieve this object, the present invention adopts the following technical solutions:

[0020] A pressure resistance detection device is provided, comprising a liquid injection mechanism, a detection element and the above-mentioned liquid injection fixture, wherein the liquid injection fixture clamps a workpiece to be detected, the liquid injection mechanism injects liquid into the inner flow channel, and the detection element is used to detect the pressure maintenance condition of the inner flow channel.

[0021] As an optional solution of the pressure resistance detection device, the pressure resistance detection device further includes a connecting pipe, and the connecting pipe is connected to an end of the injection hole away from the workpiece.

[0022] Beneficial effects of the present invention:

[0023] The present invention provides a liquid injection fixture, which clamps a workpiece through a clamping unit to ensure the stability of the workpiece when liquid is injected into a flow channel in the workpiece. The clamping unit includes a first clamping member and a second clamping member, which are spaced apart from each other and can clamp the workpiece to be injected with liquid, thereby ensuring the stability of the workpiece during the injection process. The second clamping member is provided with an injection hole connected to the inner flow channel of the workpiece, through which liquid flows in or out of the inner flow channel. The liquid injection fixture includes at least two clamping units, wherein the injection hole of one clamping unit corresponds to the liquid inlet connected to the inner flow channel of the workpiece, and the injection hole of the other clamping unit corresponds to the liquid outlet connected to the inner flow channel of the workpiece, thereby achieving stable liquid injection into the workpiece. The liquid injection fixture can ensure the stability of the workpiece when liquid is injected into the workpiece, improve the effect of liquid injection, and has a simple structure and is easy to operate.

[0024] The present invention also provides a pressure resistance detection device, including a liquid injection mechanism, a detection element and the above-mentioned liquid injection fixture. The liquid injection fixture is used to clamp the workpiece. The liquid injection mechanism can inject liquid into the liquid inlet of the inner flow channel through the liquid injection hole and maintain the pressure. The detection element is used to detect the pressure maintenance condition of the inner flow channel to ensure the stability of the workpiece during the detection process and improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the second clamping member of the liquid injection clamp provided by the present invention;

[0026] Figure 2 is a cross-sectional view of the second clamping member of the liquid injection clamp provided by the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the first clamping piece of the liquid injection clamp provided by the present invention.

[0028] In the figure:

[0029] 1. a first clamping member; 11. a first contact surface;

[0030] 2. second clamping member; 21. liquid injection hole; 22. sealing groove; 23. buffer cavity; 24. second contact surface;

[0031] 3. Sealing ring. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] like Figures 1 to 3 As shown, the liquid injection fixture of this embodiment includes a clamping unit, and the clamping unit includes a first clamping member 1 and a second clamping member 2. The first clamping member 1 and the second clamping member 2 are arranged at intervals, and the workpiece to be injected is clamped between the first clamping member 1 and the second clamping member 2. The second clamping member 2 is provided with a liquid injection hole 21, and the liquid injection hole 21 is connected to the inner flow channel of the workpiece, and the liquid injection hole 21 is for liquid to flow in or out of the inner flow channel. The liquid injection fixture includes at least two clamping units, wherein the liquid injection hole 21 of one clamping unit is connected to the liquid inlet of the inner flow channel, and the liquid injection hole 21 of the other clamping unit is connected to the liquid outlet of the inner flow channel.

[0037] Based on the above design, the workpiece is clamped by a clamping unit, which can ensure the stability of the workpiece when liquid is injected into the flow channel in the workpiece. The clamping unit includes a first clamping member 1 and a second clamping member 2, which are spaced apart from each other and used to clamp the workpiece to be injected with liquid, so as to ensure the stability of the workpiece during the injection process. The second clamping member 2 is provided with an injection hole 21 connected to the inner flow channel of the workpiece, and the liquid flows in or out of the inner flow channel through the injection hole 21. The injection fixture includes at least two clamping units, wherein the injection hole 21 of one clamping unit corresponds to the liquid inlet connected to the inner flow channel of the workpiece, and the injection hole 21 of the other clamping unit corresponds to the liquid outlet connected to the inner flow channel of the workpiece, which can avoid the clamping unit covering the liquid inlet and the liquid outlet, and facilitate the stable injection of the workpiece. The injection fixture can ensure the stability of the workpiece when injecting liquid into the workpiece, improve the injection effect, and has a simple structure and is easy to operate.

[0038] Optionally, the first clamping member 1 includes a first contact surface 11, the first contact surface 11 abuts against the workpiece, and the shape of the first contact surface 11 matches the side of the workpiece facing the first clamping member 1, so as to facilitate the positioning and fixing of the first clamping member 1 and the workpiece, and can increase the contact area between the first clamping member 1 and the workpiece, reduce the pressure on the workpiece when clamping the workpiece, and avoid damage to the surface of the workpiece. In this embodiment, the first clamping surface of the workpiece is an arc surface, and the first contact surface 11 is correspondingly set to an arc surface. By adjusting the shape of the first contact surface 11, the liquid injection fixture can be applied to workpieces of different shapes, thereby improving the scope of application of the liquid injection fixture.

[0039] Optionally, the second clamping member 2 includes a second contact surface 24, the second contact surface 24 abuts against the workpiece, and the shape of the second contact surface 24 matches the side of the workpiece facing the second clamping member 2, so as to facilitate the positioning and fixing of the second clamping member 2 and the workpiece, and can increase the contact area between the second clamping member 2 and the workpiece, reduce the pressure on the workpiece when clamping the workpiece, and avoid damage to the surface of the workpiece. In this embodiment, the second clamping surface of the workpiece is an arc surface, and the second contact surface 24 is correspondingly set to an arc surface. By adjusting the shape of the second contact surface 24, the liquid injection fixture can be applied to workpieces of different shapes, thereby improving the scope of application of the liquid injection fixture.

[0040] Furthermore, the liquid injection fixture also includes a sealing ring 3, which is connected to the side of the second clamping member 2 facing the workpiece to achieve a sealed connection between the second clamping member 2 and the workpiece to prevent leakage when the liquid injection hole 21 is connected to the inner flow channel.

[0041] Optionally, the second clamping member 2 is also provided with a sealing groove 22, which is provided on the side of the second clamping member 2 facing the workpiece, and the sealing ring 3 is provided in the sealing groove 22 to prevent the sealing ring 3 from falling off from between the second clamping member 2 and the workpiece, thereby reducing the compression amount of the sealing ring 3 while ensuring the compression seal of the sealing ring 3, thereby ensuring the service life of the sealing ring 3.

[0042] Furthermore, the second clamping member 2 further includes a buffer cavity 23, which is connected to one end of the injection hole 21 facing the workpiece, and the cross-sectional area of ​​the buffer cavity 23 is larger than the cross-sectional area of ​​the injection hole 21. When the injection mechanism injects liquid of a certain pressure into the liquid inlet of the inner flow channel, the buffer cavity 23 can buffer the liquid flowing into and out of the inner flow channel, reduce the impact of the liquid pressure on the workpiece and the second clamping member 2, and further ensure the stability of the connection between the second clamping member 2 and the workpiece.

[0043] Furthermore, the liquid injection fixture also includes a positioning member (not shown in the figure), which can be inserted into the liquid injection hole 21 and extend into the inner flow channel, and is used to detect whether the liquid injection hole 21 and the inner flow channel are unobstructed, so as to ensure that liquid can be smoothly injected into the inner flow channel. Exemplarily, the positioning member can be a round rod, a square rod, etc. The positioning member can be made of metal materials, such as stainless steel, aluminum alloy, etc., or non-metallic materials such as silicon oxide, plastic, etc., and the shape of the end of the positioning member extending into the inner flow channel can be adjusted according to the shape of the inner flow channel.

[0044] Furthermore, the injection fixture also includes a connecting piece (not shown in the figure), which is connected to the first clamping piece 1 and the second clamping piece 2, and is used to drive the first clamping piece 1 and the second clamping piece 2 to move closer to or farther from each other, so as to achieve the clamping and loosening of the workpiece. Optionally, the connecting piece can be a bolt and a nut, and the bolt is passed through the first clamping piece 1 and the second clamping piece 2 and is threadedly connected to the nut, and the first clamping piece 1 and the second clamping piece 2 are moved closer to or farther from each other by the rotation of the nut. In some other embodiments, the first clamping piece 1 and the second clamping piece 2 can also be driven by pneumatic, electric or other means, which will not be described in detail here.

[0045] This embodiment also provides a pressure resistance testing device, including a liquid injection mechanism, a detection element and the above-mentioned liquid injection fixture, the liquid injection fixture clamps the workpiece to be tested, the liquid injection mechanism injects liquid into the inner flow channel, and the detection element is used to detect the pressure maintenance condition of the inner flow channel to ensure the stability of the workpiece during the testing process and improve the detection accuracy.

[0046] Optionally, the pressure resistance detection device also includes a connecting tube, which is connected to the end of the injection hole 21 away from the workpiece, and the detection element is connected to the connecting tube. The injection mechanism injects liquid of a certain pressure into the injection hole 21 and the liquid inlet in turn through the connecting tube. After maintaining the pressure in the inner flow channel for a certain period of time, the liquid pressure in the inner flow channel is detected by the detection element and compared with the injection pressure of the injection mechanism to realize the pressure resistance monitoring of the workpiece.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A liquid injection fixture, characterized in that: include: A clamping unit, the clamping unit comprising a first clamping member (1) and a second clamping member (2), the first clamping member (1) and the second clamping member (2) being arranged at an interval, and the workpiece to be injected with liquid is clamped between the first clamping member (1) and the second clamping member (2); The second clamping member (2) is provided with a liquid injection hole (21), the liquid injection hole (21) is communicated with the inner flow channel of the workpiece, and the liquid injection hole (21) is used for liquid to flow into or out of the inner flow channel; The liquid injection fixture comprises at least two clamping units, wherein the liquid injection hole (21) of one of the clamping units is connected to the liquid inlet of the inner flow channel, and wherein the liquid injection hole (21) of the other clamping unit is connected to the liquid outlet of the inner flow channel.

2. The liquid injection fixture according to claim 1, characterized in that: The liquid injection fixture further comprises a sealing ring (3), wherein the sealing ring (3) is connected to a side of the second clamping member (2) facing the workpiece.

3. The liquid injection fixture according to claim 2, characterized in that: The second clamping member (2) is also provided with a sealing groove (22), the sealing groove (22) being provided on a side of the second clamping member (2) facing the workpiece, and the sealing ring (3) being provided in the sealing groove (22).

4. The liquid injection fixture according to claim 1, characterized in that: The second clamping member (2) further comprises a buffer cavity (23), the buffer cavity (23) being connected to one end of the injection hole (21) facing the workpiece, and the cross-sectional area of ​​the buffer cavity (23) being larger than the cross-sectional area of ​​the injection hole (21).

5. The liquid injection fixture according to claim 1, characterized in that: The liquid injection fixture also includes a positioning piece, which can be inserted into the liquid injection hole (21) and extend into the inner flow channel.

6. The liquid injection fixture according to claim 1, characterized in that: The first clamping member (1) comprises a first contact surface (11), the first contact surface (11) abuts against the workpiece, and the shape of the first contact surface (11) matches a surface of the workpiece facing the first clamping member (1).

7. The liquid injection fixture according to claim 1, characterized in that: The second clamping member (2) comprises a second contact surface (24), the second contact surface (24) abuts against the workpiece, and the shape of the second contact surface (24) matches a surface of the workpiece facing the second clamping member (2).

8. The liquid injection fixture according to claim 1, characterized in that: The liquid injection clamp further comprises a connecting member, wherein the connecting member is connected to the first clamping member (1) and the second clamping member (2), and the connecting member is used to drive the first clamping member (1) and the second clamping member (2) to move closer to or farther from each other.

9. A withstand voltage detection device, characterized in that: It comprises a liquid injection mechanism, a detection element and the liquid injection fixture according to any one of claims 1 to 8, wherein the liquid injection fixture clamps the workpiece to be detected, the liquid injection mechanism injects liquid into the inner flow channel, and the detection element is used to detect the pressure maintaining condition of the inner flow channel.

10. The withstand voltage detection device according to claim 9, characterized in that: The pressure resistance detection device also includes a connecting pipe, which is connected to an end of the liquid injection hole (21) away from the workpiece.

Images