Detection tool suitable for spinning manifold pressure cover

Abstract

The invention discloses a detection tool suitable for a spinning manifold pressure cover, the pressure cover comprises a to-be-detected external thread, the detection tool comprises a support member capable of generating linear displacement, a displacement measurement mechanism used for measuring the displacement value of the support member and arranged on the support member, an operation sleeve and an elastic member, the operation sleeve is provided with an internal thread matched with an external thread to be detected, and the operation sleeve can be rotationally arranged relative to the supporting piece and can be arranged on the supporting piece in a sleeving manner; the upper end of the elastic piece is arranged on the supporting piece, and the extending direction of the elastic piece is parallel to the linear displacement direction of the supporting piece. According to the detection tool, the thread gap of the external thread to be detected can be detected only by screwing the pressure cover to be detected on the operation sleeve and then pressing the operation sleeve, a high-precision thread detector with high price does not need to be used, the cost is greatly saved, the detection process is simplified, and the detection tool is convenient, rapid, high in efficiency, small in overall size and convenient to use. And taking or carrying and storing are convenient.

Description

Technical Field

[0001] The invention relates to the field of chemical fiber technology, and in particular to a detection tool suitable for a spinning box pressure cover. Background Art

[0002] In the chemical fiber spinning process, the spinneret assembly is a very important spinning component. Usually, a pressure cover is used to connect the spinneret to the spinning box. At the same time, a melt filter device such as a filter screen is set between the pressure cover and the spinneret. The melt passes through the pressure cover and is filtered by the melt filter device such as the filter screen before entering the spinneret connected to the pressure cover and being ejected. Therefore, the pressure cover plays an important role in connection and communication, and its precision will greatly affect the stability and quality of the spinneret.

[0003] Generally, first, the pressure cap is connected to other parts by screwing, so the number of screwing turns of its external thread is one of the important indicators. Since the pressure cap and the spinneret are often disassembled and the spinneret is cleaned, if the threads of the pressure cap are damaged after long-term use, the unreasonable number of screwing turns will have a negative impact on the connection effect and may even cause leakage;

[0004] Second, since the spinneret assembly or the spinning box is in a high temperature state during the spinning process, which will reach about 200-300°C, the thread gap of the pressure cover is easily deformed when working at high temperature. If the external thread on the pressure cover matches the internal thread with which it is connected, it will be difficult to remove it after high temperature deformation. Therefore, it is usually necessary to reserve some deformation in the design, but the deformation should not be too large, which will easily cause loose connection, nor too small, which will easily make it difficult to remove after high temperature deformation;

[0005] Third, the pressure cover is also provided with melt flow channels, usually multiple channels are provided, and the relative positions between these melt flow channels must be precise, otherwise it is easy to cause a large change in pressure when the melt flows, thereby affecting the continuous and stable supply of the melt.

[0006] At present, the above three aspects are usually measured separately. The number of thread turns and thread gap are generally detected by high-precision thread detectors, and the relative positions between melt flow channels are generally detected by high-precision measuring rulers or other high-precision measuring equipment. However, the above equipment is not only time-consuming and labor-intensive, but also inefficient. At the same time, high-precision thread detectors are not only expensive, but also usually require a driving mechanism to be driven, with high precision requirements. Once damaged, the replacement cost is also high, and the structure is complex and the volume is large. Summary of the invention

[0007] The object of the present invention is to overcome one or more deficiencies in the prior art and to provide a novel detection tool suitable for a spinning manifold pressure cover, which can at least solve one problem existing in the prior art.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A detection tool suitable for a spinning manifold pressure cover, the spinning manifold pressure cover comprising an external thread to be detected, the detection tool comprising:

[0010] a support member capable of linear displacement;

[0011] A displacement measuring mechanism, which is used to measure the displacement value of the support member and is arranged on the support member;

[0012] An operating sleeve, the operating sleeve is formed with an internal thread that matches the external thread to be measured, and the operating sleeve is rotatably arranged relative to the support member and can be sleeved on the support member;

[0013] an elastic member, the upper end of which is arranged on the support member, and the extension direction of the elastic member is parallel to the linear displacement direction of the support member;

[0014] The detection tool includes a detection state and a non-detection state. When the detection tool is in the non-detection state, a thread gap is formed after the internal thread and the external thread to be detected are screwed together, the elastic member is in a first compression state, and the support member is in a first position; when the detection tool is in the detection state, the elastic member is in a second compression state, and the support member is in a second position; wherein the thread gap is the distance between the second position and the first position, and the degree of compression of the second compression state is greater than or equal to the degree of compression of the first compression state.

[0015] According to some preferred aspects of the present invention, when the detection tool is in the non-detection state, the thread gap is formed between the lower end face of one of the threads in the internal thread and the upper end face of the corresponding thread in the external thread to be detected; when the detection tool is in the detection state, the lower end face is in contact with the upper end face.

[0016] According to some preferred aspects of the present invention, a limiting step is formed at the upper end of the support member, and when the detection tool is in the non-detection state or the detection state, the operating sleeve can be pressed onto the limiting step.

[0017] In some embodiments of the present invention, when the thread gap is 0, the first compression state is the same as the second compression state, and the first position is the same as the second position; when the thread gap is greater than 0, the second position is below the first position, and the degree of compression of the second compression state is greater than that of the first compression state.

[0018] According to some preferred aspects of the present invention, the detection tool further comprises a substrate;

[0019] The support member comprises a support body, and a limiting member arranged on the support body and used to limit the position of the substrate, and the substrate is sleeved on the support body and can perform linear movement relative to the support body;

[0020] The upper end of the elastic member is connected to the supporting body, and the lower end of the elastic member is connected to the base plate.

[0021] According to some preferred aspects of the present invention, the limiting member is arranged below the substrate, and when the detection tool is in the non-detection state, the distance between the substrate and the limiting member is a first distance; when the detection tool is in the detection state, the distance between the substrate and the limiting member is a second distance, and the second distance is greater than the first distance.

[0022] According to some preferred aspects of the present invention, a plurality of holes are formed on the support body, the elastic members have a number corresponding to the number of the holes, and the elastic members have a portion located in the holes.

[0023] According to some preferred aspects of the present invention, the orthographic projection of the limiting member is located within the orthographic projection range of the substrate.

[0024] In some embodiments of the present invention, the spinning manifold pressure cover further comprises at least two melt flow channels to be tested;

[0025] The lower end of the support member is formed with support positioning columns of a number corresponding to the melt flow channels to be tested, and each of the support positioning columns can be inserted into the corresponding melt flow channel to be tested.

[0026] According to some preferred aspects of the present invention, when the detection tool is in the detection state, the supporting positioning column extends downward from the lower end surface of the operating sleeve.

[0027] According to some preferred aspects of the present invention, when the detection tool is in the non-detection state, there is a gap between the lower end surface of the support positioning column and the melt flow channel to be detected, and the distance of the gap is greater than the thread gap.

[0028] According to some preferred aspects of the present invention, a limiting protrusion is provided in the operating sleeve, and the limiting protrusion is provided at a starting position of an upper portion of the internal thread.

[0029] According to some preferred aspects of the present invention, the upper end surface of the support member is provided with a first detection line, and the upper end surface of the operating sleeve is provided with a second detection line, a third detection line and a fourth detection line which can be colinear with the first detection line, and the third detection line and the fourth detection line are arranged on both sides of the second detection line.

[0030] According to some preferred aspects of the present invention, the displacement measuring mechanism is a dial indicator, which includes a measuring rod and a probe arranged at the lower end of the measuring rod, and a through hole for the measuring rod and the probe to pass through is formed in the middle of the support.

[0031] In the present invention, the dial indicator is an existing commercial product, which is a table-type universal length measuring tool made by a precision rack and pinion mechanism. It is usually composed of a probe, a measuring rod, a shockproof spring, a rack, a gear, a hairspring, a round dial and a pointer. The working principle of the dial indicator is to amplify the tiny linear movement of the measuring rod caused by the measured size through gear transmission and convert it into the rotation of the pointer on the dial, so as to read the size of the measured size. The dial indicator is a measuring instrument that uses a rack and pinion or a lever gear transmission to convert the linear displacement of the measuring rod into the angular displacement of the pointer.

[0032] In some embodiments of the present invention, the detection tool further includes a locking assembly, which includes a locking hole formed on the support member, a locking pin that can be inserted into the locking hole, and the locking pin can be abutted against the displacement measuring mechanism.

[0033] In some embodiments of the present invention, the elastic member is a spring.

[0034] According to some preferred aspects of the present invention, the detection tool also includes a calibration part, which includes at least a calibration external thread, and the calibration external thread is a preset standard thread of the external thread to be tested, and the calibration external thread and the internal thread can be screwed together to realize the calibration of the detection tool.

[0035] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0036] Based on the defects of the prior art in detecting important parameters of the pressure cover, such as high price, large size, and cumbersome detection process, the present invention innovatively provides a new detection tool suitable for the pressure cover of a spinning box body. The detection tool only needs to screw the pressure cover to be detected on the operating sleeve, and then press the operating sleeve to detect the thread gap of the external thread to be detected. There is no need to use an expensive high-precision thread detector, which greatly saves costs and simplifies the detection process. It is convenient, fast, and efficient. At the same time, the overall volume is small, which is easy to take or carry and store.

[0037] Furthermore, the inventors of the present invention have achieved the conversion of the thread gap into the displacement of the support member through the coordination of the support member, the displacement measuring mechanism, the operating sleeve, the elastic member, etc., and then the thread gap value can be obtained by synchronously measuring the displacement of the support member, wherein, by switching between different states of different components, the synchronous detection of multiple functions can be achieved with fewer components and a simpler structure; in the present invention, by arranging a plurality of support positioning columns at the bottom of the support member so that they respectively correspond to a melt flow channel to be measured, the plurality of support positioning columns are respectively inserted in the corresponding melt flow channel to be measured, that is, the distance between the plurality of support positioning columns is pre-set according to the standard melt flow channel spacing in the pressure cover, and through their insertion and coordination, it is possible to directly know whether the relative position of the melt flow channel to be measured in the pressure cover is accurate, and whether unexpected changes have occurred. shape, etc., in particular, the arrangement of the multiple supporting positioning columns further ensures the stability when the operating sleeve is threadedly screwed relative to the spinning manifold pressure cover (or calibration part). Due to the presence of the multiple supporting positioning columns, after they are inserted into the melt flow channel, the ability of the support to rotate relative to the spinning manifold pressure cover (or calibration part) is restricted in disguise, so that the operating sleeve can be stably, quickly and accurately screwed onto the spinning manifold pressure cover (or calibration part) without interfering with the support, and the stable arrangement of the support further ensures that the displacement measuring mechanism will not undergo unexpected displacement, thereby ensuring the measurement progress; in addition, when the operating sleeve is screwed onto the spinning manifold pressure cover, the number of turns of the screwing can be used to confirm whether the number of turns of the external thread on the spinning manifold pressure cover is still qualified, thereby ensuring the tightness of the subsequent screwing and avoiding melt leakage.

[0038] Furthermore, the present invention can realize the simultaneous detection of the number of screw-on turns of the pressure cover thread, the pressure cover thread gap, and the relative position between the pressure cover melt flow channels, and has a simple structure, is easy to operate, and has a small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 It is a schematic diagram of the structure of a detection tool applicable to a spinning manifold pressure cover in an embodiment of the present invention;

[0041] Figure 2 Schematic diagram of the structure of a detection tool applicable to a spinning manifold pressure cover in an embodiment of the present invention (some components are hidden);

[0042] Figure 3 It is a schematic diagram of the parts of the detection tool for the pressure cover of the spinning manifold according to the embodiment of the present invention after being separated;

[0043] Figure 4 It is an exploded schematic diagram of a detection tool suitable for a spinning manifold pressure cover in an embodiment of the present invention;

[0044] Figure 5 It is a top view schematic diagram of a pressure cover applicable to a spinning manifold in an embodiment of the present invention;

[0045] Figure 6 for Figure 5 Schematic diagram of the cross section in the AA direction;

[0046] Figure 7 It is a partial schematic diagram of a cutaway portion of a pressure cover for a spinning manifold in an embodiment of the present invention;

[0047] Figure 8 It is a simplified structural schematic diagram of the detection tool in a non-detection state according to an embodiment of the present invention;

[0048] Fig. 9 It is a simplified structural schematic diagram of a detection tool in a detection state according to an embodiment of the present invention;

[0049] Fig.10 This is a schematic diagram of the structure of a detection tool suitable for a spinning manifold pressure cover in an embodiment of the present invention (components such as an operating sleeve, a calibration part, and an elastic part are hidden);

[0050] Fig.11 It is a structural schematic diagram of a support member in an embodiment of the present invention;

[0051] Fig.12 Schematic diagram of the structure of a detection tool applicable to a spinning manifold pressure cover in an embodiment of the present invention (the calibration part is hidden);

[0052] Fig.13 It is a schematic diagram of the coordination of the displacement measuring mechanism, the base plate, the stopper and other structures in the embodiment of the present invention;

[0053] Fig.14 It is a structural schematic diagram of an operating sleeve in an embodiment of the present invention;

[0054] Fig.15 It is a schematic diagram of the structure of the calibration component in an embodiment of the present invention;

[0055] Fig.16 is a schematic top view of a calibration component in an embodiment of the present invention;

[0056] In the accompanying drawings: 1. support member; 11. limit step; 12. support body; 121. hole groove; 122. snap-fit ​​groove; 13. limit member; 14. support positioning column; 15. first detection line; 16. through hole; 2. dial indicator; 21. measuring rod; 22. probe; 3. operating sleeve; 31. internal thread; 32. limit protrusion; 33. second detection line; 34. third detection line; 35. fourth detection line; 36. clearance hole; 37. snap-fit ​​step; 4. elastic member; 5. substrate; 61. locking hole; 62. locking pin; 7. calibration member; 71. calibration external thread; 72. calibration melt flow channel; 8. cover plate; H. thread gap. DETAILED DESCRIPTION

[0057] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0058] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] In the invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0062] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0063] like Figures 1 to 16 As shown, this example provides a detection tool suitable for a spinning manifold pressure cover, the spinning manifold pressure cover includes an external thread to be tested, the detection tool includes a support member 1 capable of linear displacement, a displacement measuring mechanism for measuring the displacement value of the support member 1 and arranged on the support member 1, an operating sleeve 3 and an elastic member 4.

[0064] The operating sleeve 3 is formed with an internal thread 31 that cooperates with the external thread to be measured. The operating sleeve 3 can be rotatably arranged relative to the support member 1 and can be sleeved on the support member 1; the upper end of the elastic member 4 is arranged on the support member 1, and the extension direction of the elastic member 4 is parallel to the linear displacement direction of the support member 1.

[0065] The detection tool includes a detection state and a non-detection state. When the detection tool is in the non-detection state, a thread gap H is formed after the internal thread 31 is screwed together with the external thread to be detected, the elastic member 4 is in a first compression state, and the support member 1 is in a first position; when the detection tool is in the detection state, the elastic member 4 is in a second compression state, and the support member 1 is in a second position; wherein the thread gap H is the distance between the second position and the first position, and the degree of compression in the second compression state is greater than or equal to the degree of compression in the first compression state.

[0066] In this example, when the detection tool is in a non-detection state, a thread gap H is formed between the lower end face of one of the threads in the internal thread 31 and the upper end face of the corresponding thread in the external thread to be detected; when the detection tool is in a detection state, the lower end face fits with the upper end face. Further, a limiting step 11 is formed at the upper end of the support member 1, and when the detection tool is in a non-detection state or a detection state, the operating sleeve 3 can be pressed on the limiting step 11. Further, when the thread gap H is 0, the first compression state is the same as the second compression state, and the first position is the same as the second position; when the thread gap H is greater than 0, the second position is located below the first position, and the degree of compression in the second compression state is greater than that in the first compression state.

[0067] In this example, the detection tool also includes a substrate 5, the support member 1 includes a support body 12, a stopper 13 arranged on the support body 12 and used to limit the substrate 5, the substrate 5 is sleeved on the support body 12 and can move linearly relative to the support body 12; the upper end of the elastic member 4 is connected to the support body 12, the lower end of the elastic member 4 is connected to the substrate 5, and the orthographic projection of the stopper 13 is located within the orthographic projection range of the substrate 5. Further, the stopper 13 is arranged below the substrate 5, when the detection tool is in a non-detection state, the distance between the substrate 5 and the stopper 13 is a first distance; when the detection tool is in a detection state, the distance between the substrate 5 and the stopper 13 is a second distance, and the second distance is greater than the first distance. In order to facilitate the stability of the setting of the elastic member and the need to protect it, a plurality of holes 121 are formed on the support body 12, the elastic member 4 has a number corresponding to the hole 121, and the elastic member 4 has a part located in the hole 121.

[0068] In this example, the spinning manifold pressure cover also includes at least two melt flow channels to be tested; the lower end of the support member 1 is formed with support positioning columns 14 corresponding to the melt flow channels to be tested, and each support positioning column 14 can be inserted into the corresponding melt flow channel to be tested. Further, when the detection tool is in the detection state, the support positioning column 14 extends downward from the lower end surface of the operating sleeve 3; when the detection tool is in the non-detection state, there is a gap between the lower end surface of the support positioning column 14 and the melt flow channel to be tested, and the distance of the gap is greater than the thread gap.

[0069] In this example, a limit protrusion 32 is provided in the operating sleeve 3, and the limit protrusion 32 is provided at the starting position of the upper part of the internal thread 31. Further, a first detection line 15 is provided on the upper end surface of the support member 1, and a second detection line 33, a third detection line 34 and a fourth detection line 35 which can be colinear with the first detection line 15 are provided on the upper end surface of the operating sleeve 3, and the third detection line 34 and the fourth detection line 35 are arranged on both sides of the second detection line 33.

[0070] In this example, the displacement measuring mechanism is a dial gauge 2, which includes a measuring rod 21 and a probe 22 disposed at the lower end of the measuring rod 21. A through hole is formed in the middle of the support member 1 for the measuring rod 21 and the probe 22 to pass through.

[0071] The dial indicator is a commercially available product. It is a universal length measuring tool made of a precision rack and pinion mechanism. It is usually composed of a probe, a measuring rod, a shockproof spring, a rack, a gear, a hairspring, a round dial and a pointer. The working principle of the dial indicator is to amplify the tiny linear movement of the measuring rod caused by the measured size through gear transmission and convert it into the rotation of the pointer on the dial, so as to read the size of the measured size. The dial indicator is a measuring instrument that uses a rack and pinion or a lever gear transmission to convert the linear displacement of the measuring rod into the angular displacement of the pointer. Its structure will not be described in detail here.

[0072] In this example, the detection tool further includes a locking assembly, which includes a locking hole 61 formed on the support member 1, a locking pin 62 that can be inserted into the locking hole 61, and the locking pin 62 can be abutted against the displacement measuring mechanism.

[0073] In this example, the elastic member 4 is a spring, which has a simple structure, can achieve accurate resetting, has a long service life, and is easy to install and disassemble.

[0074] In this example, the detection tool also includes a calibration part 7, which at least includes a calibration external thread 71 and a plurality of calibration melt flow channels 72. The calibration external thread 71 is a preset standard thread of the external thread to be tested. The calibration external thread 71 and the internal thread 31 can be screwed together to realize the calibration of the detection tool. By respectively inserting a plurality of supporting positioning columns 14 into corresponding melt flow channels (or calibration melt flow channels) and according to the insertion and matching conditions, the accuracy of the relative position between the melt flow channels (or calibration melt flow channels) can be judged, thereby realizing the calibration and verification of the relative position of the melt flow channels (or calibration melt flow channels).

[0075] See also Figures 1 to 4As shown, in the detection tool of this example, the operating sleeve 3 is a hollow structure, and the lower part is an open full-open structure, and the upper part has an upper opening that allows the dial gauge 2 to be exposed. The upper part of the dial gauge 2 protrudes from the operating sleeve 3 and the support member 1, and there is a clamping step 37 above the internal thread 31 formed inside the operating sleeve 3. The clamping step 37 will cooperate with the limiting step 11 of the support member 1 for positioning and clamping. At the same time, a clearance hole 36 is formed on the operating sleeve 3, which is convenient for the locking pin 62 to be inserted into the locking hole 6 through the clearance hole 36. 1, the locking hole 61 is aligned with the corresponding position of the dial indicator, so that the dial indicator 2 can be easily fixed on the support 1, so that when the support 1 is linearly displaced, the dial indicator 2 can also be linearly displaced. When the measuring rod 21 of the dial indicator 2 is displaced, it can represent the displacement of the thread gap. Multiple conversions can be used to measure the thread gap. The measurement principle of the dial indicator is a prior art, and the dial indicator can also be purchased commercially, so it will not be described in detail here; further, the locking pin 62 can be a bolt, and the locking hole 61 can be a bolt hole. Among them, Figure 2 Relative to Figure 1 A cover plate is hidden, and the cover plate 8 can block the risk of exposure and prevent debris from falling into it.

[0076] Also, see Figure 5 As shown, a first detection line 15 is also set on the upper end surface of the support member 1, and a second detection line 33, a third detection line 34, and a fourth detection line 35 are set on the upper end surface of the operating sleeve 3, and the third detection line 34 and the fourth detection line 35 are respectively arranged on the left and right sides of the second detection line 33. When the operating sleeve 3 is screwed relative to the calibration member 7 (or the pressure cover to be tested), if the first detection line 15 is aligned with the second detection line 33, it means that the number of external thread turns on the calibration member 7 (or the pressure cover to be tested) is reasonable and accurate. If the first detection line 15 deviates from the second detection line 33 but is located between the third detection line 34 and the fourth detection line 35, it means that although it is not the most ideal state, the fluctuation range is acceptable. If the first detection line 15 is completely outside the area defined between the third detection line 34 and the fourth detection line 35, it means that the number of external thread turns is seriously inaccurate (of course, this only applies to the pressure cover to be tested. The calibration member is a high-precision standard member set at the beginning, and its various parameters are in the best state).

[0077] See also Figures 1 to 9As shown, during the inspection, the detection tool of this example manually presses the operating sleeve 3. Since the operating sleeve 3 is pressed on the support member 1, and the dial indicator 2 is set on the support member 1, when the operating sleeve 3 is pressed, the support member 1 and the dial indicator 2 are synchronously driven to move downward. When moving downward, since the base plate 5 is overlapped and supported on the internal step of the calibration member 7 (or the pressure cover to be tested), the spring is compressed, and the support body 12 and the limit member 13 of the support member 1 are not affected and can move downward, so that the probe 22 and the measuring rod 21 of the dial indicator 2 play a measuring role; as shown in FIG. Figure 8 and Fig. 9 As shown in FIG. 1 , the relative position relationship between the internal thread 31 on the operating sleeve 3 and the external thread (or calibration external thread 71) on the calibration piece 7 (or the pressure cap to be measured) in different states is simply illustrated. Figure 8 In the embodiment, when no external force is applied, that is, the operating sleeve 3 is not manually pressed, the spring will also be compressed and deformed to a certain extent due to the gravity of the support member 1 and the operating sleeve 3. At this time, a thread gap H is formed between the lower end face of a thread on the operating sleeve 3 and the upper end face of a thread on the calibration member 7 (or the pressure cover to be measured). Fig. 9 As shown, when an external force is applied, i.e., the operating sleeve 3 is manually pressed to reach the preset position, i.e., the lower end face of a thread on the operating sleeve 3 is fitted with the upper end face of a thread on the calibration member 7 (or the pressure cover to be measured), it can no longer move downward, which is equivalent to reaching the preset position (i.e., the end position). At this time, the thread gap H is eliminated by the linear displacement of the operating sleeve 3 and converted into the linear displacement of the support member 1, and the linear displacement of the support member 1 is measured by the dial indicator 2, thereby realizing the measurement of the thread gap with the above-mentioned simple structure, without the need for expensive detection equipment such as sensors; wherein, the size of the thread gap is what needs to be detected and And the indicator being paid attention to is, if the value of the thread clearance obtained by measurement is within the set range, it means that the pressure cap to be tested is qualified, if the value of the thread clearance obtained by measurement is outside the set range, it means that the pressure cap to be tested is unqualified and needs to be repaired or replaced with a new one; of course, the various parameters of the calibration component 7 are optimal, and they are all ideal values ​​during detection. They are mainly used for calibration of the support 1, the operating sleeve 3 and the dial indicator 2. If the value of the thread clearance measured by the calibration component 7 is not the preset value, it means that at least one of the support 1, the operating sleeve 3 and the dial indicator 2 has a defect or problem and needs to be recalibrated.

[0078] See also Figures 10 to 14As shown, the schematic structure of the support member 1, the operating sleeve 3, the base plate 5, the dial indicator 2 and other components are given as an example. The base plate 5 is roughly annular and is sleeved on the outer periphery of the support body 12. The limiter 13 is detachably clamped in the clamping groove 122 on the support body 12. In the normal non-detection state, the base plate 5 and the limiter 13 are generally not in contact and are separated by a certain distance. The overall radial dimension of the limiter 13 is small and hidden within the positive projection range of the base plate 5. Two support positioning columns 14 are set at the lower end of the support body 12. The distance between them is set according to the standard distance between the melt flow channels in the standard pressure cover. In this way, when they are inserted into the test body, After the melt flow channel of the pressure cover is inserted, it can be directly learned whether the distance between the melt flow channels of the pressure cover to be tested meets the requirements, and after insertion, the support member 1 is limited in the horizontal direction at the same time, which limits the rotation movement of the support member 1, thereby better ensuring the stability of the support member 1 when the operating sleeve 3 rotates, and further ensuring the stability of the dial indicator 2; as can be seen from the figure, the support member 1 is roughly wide at the top and narrow at the bottom, and its lower end is exposed from the lower opening of the operating sleeve and extends outward, so that when it is screwed with the calibration member 7 (or the pressure cover to be tested), the dial indicator 2 and the support positioning column 14 can be docked or matched with the corresponding position of the calibration member 7 (or the pressure cover to be tested).

[0079] See also Figure 15 to Figure 16 As shown, the calibration part 7 integrates all the structural features that need to be tested of the pressure cover to be tested, such as external threads (corresponding to the calibration external threads 71), such as melt flow channels (corresponding to the calibration melt flow channels 72). Therefore, the design of the standard part completely replicates all the structural features of the standard pressure cover. Of course, the structural features that do not need to be tested can be omitted, and the relevant parts of the structural features that need to be tested are completely replicated. In this way, calibration of other components can be achieved through the standard calibration part 7, avoiding inaccurate test results caused by the detection tool itself.

[0080] In summary, the present invention is based on the defects of the prior art in detecting the important parameters of the pressure cover, such as high price, large size, and cumbersome detection process, and innovatively provides a new detection tool suitable for the pressure cover of the spinning box body. The detection tool only needs to screw the pressure cover to be detected on the operating sleeve, and then press the operating sleeve to detect the thread gap of the external thread to be detected. There is no need to use an expensive high-precision thread detector, which greatly saves costs and simplifies the detection process. It is convenient, fast, and efficient. At the same time, the overall volume is small, which is easy to take or carry and store.

[0081] Furthermore, the inventors of the present invention have achieved the conversion of the thread gap into the displacement of the support member through the coordination of the support member, the displacement measuring mechanism, the operating sleeve, the elastic member, etc., and then the thread gap value can be obtained by synchronously measuring the displacement of the support member, wherein, by switching between different states of different components, the synchronous detection of multiple functions can be achieved with fewer components and a simpler structure; in the present invention, by arranging a plurality of support positioning columns at the bottom of the support member so that they respectively correspond to a melt flow channel to be measured, the plurality of support positioning columns are respectively inserted in the corresponding melt flow channel to be measured, that is, the distance between the plurality of support positioning columns is pre-set according to the standard melt flow channel spacing in the pressure cover, and through their insertion and coordination, it can be directly known whether the position of the melt flow channel to be measured in the pressure cover is accurate and whether unexpected deformation occurs. Etc., in particular, the provision of the plurality of support positioning columns further ensures the stability when the operating sleeve is threadedly screwed relative to the spinning manifold pressure cover (or calibration part). Due to the presence of the plurality of support positioning columns, after they are inserted into the melt flow channel, the ability of the support to rotate relative to the spinning manifold pressure cover (or calibration part) is limited in disguise, thereby enabling the operating sleeve to be stably, quickly and accurately screwed onto the spinning manifold pressure cover (or calibration part) without interfering with the support. The stable provision of the support further ensures that the displacement measuring mechanism will not undergo unexpected displacement, thereby ensuring the measurement progress. In addition, when the operating sleeve is screwed onto the spinning manifold pressure cover, the number of turns of the screwing can be used to confirm whether the number of turns of the external thread on the spinning manifold pressure cover is still qualified, thereby ensuring the tightness of the subsequent screwing and avoiding melt leakage.

[0082] Furthermore, the present invention can realize the simultaneous detection of the number of screw-on turns of the pressure cover thread, the pressure cover thread gap, and the relative position between the pressure cover melt flow channels, and has a simple structure, is easy to operate, and has a small size.

[0083] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

[0084] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

Claims

1. A detection tool suitable for a spinning manifold pressure cover, the spinning manifold pressure cover comprising an external thread to be tested, characterized in that: The detection tool comprises: a support member capable of linear displacement; A displacement measuring mechanism, which is used to measure the displacement value of the support member and is arranged on the support member; An operating sleeve, the operating sleeve is formed with an internal thread that matches the external thread to be measured, and the operating sleeve is rotatably arranged relative to the support member and can be sleeved on the support member; an elastic member, the upper end of which is arranged on the support member, and the extension direction of the elastic member is parallel to the linear displacement direction of the support member; The detection tool includes a detection state and a non-detection state. When the detection tool is in the non-detection state, a thread gap is formed after the internal thread and the external thread to be detected are screwed together, the elastic member is in a first compression state, and the support member is in a first position; when the detection tool is in the detection state, the elastic member is in a second compression state, and the support member is in a second position; wherein the thread gap is the distance between the second position and the first position, and the degree of compression of the second compression state is greater than or equal to the degree of compression of the first compression state.

2. The detection tool suitable for the spinning manifold pressure cover according to claim 1, characterized in that: When the detection tool is in the non-detection state, the thread gap is formed between the lower end face of one thread in the internal thread and the upper end face of the corresponding thread in the external thread to be detected; when the detection tool is in the detection state, the lower end face is in contact with the upper end face.

3. The detection tool suitable for the spinning manifold pressure cover according to claim 1, characterized in that: A limiting step is formed at the upper end of the support member, and when the detection tool is in the non-detection state or the detection state, the operating sleeve can be pressed onto the limiting step; and / or, when the thread gap is 0, the first compression state is the same as the second compression state, and the first position is the same as the second position; when the thread gap is greater than 0, the second position is located below the first position, and the degree of compression of the second compression state is greater than that of the first compression state.

4. The detection tool for the spinning manifold pressure cover according to claim 1, characterized in that: The detection tool also includes a substrate; The support member comprises a support body, and a limiting member arranged on the support body and used to limit the position of the substrate, and the substrate is sleeved on the support body and can perform linear movement relative to the support body; The upper end of the elastic member is connected to the supporting body, and the lower end of the elastic member is connected to the base plate.

5. The detection tool suitable for the spinning manifold pressure cover according to claim 4, characterized in that: The limiting member is arranged below the substrate, and when the detection tool is in the non-detection state, the distance between the substrate and the limiting member is a first distance; when the detection tool is in the detection state, the distance between the substrate and the limiting member is a second distance, and the second distance is greater than the first distance; and / or, a plurality of holes and grooves are formed on the support body, the elastic member has a number corresponding to the holes and grooves, and a part of the elastic member is located in the holes and grooves; and / or, the orthographic projection of the limiting member is located within the orthographic projection range of the substrate.

6. The detection tool for the spinning manifold pressure cover according to claim 1, characterized in that: The spinning manifold pressure cover also includes at least two melt flow channels to be tested; The lower end of the support member is formed with support positioning columns of a number corresponding to the melt flow channels to be tested, and each of the support positioning columns can be inserted into the corresponding melt flow channel to be tested.

7. The detection tool for the spinning manifold pressure cover according to claim 6, characterized in that: When the detection tool is in the detection state, the support positioning column extends downward from the lower end surface of the operating sleeve; and / or, When the detection tool is in the non-detection state, there is a gap between the lower end surface of the support and positioning column and the melt flow channel to be detected, and the distance of the gap is greater than the thread gap.

8. The detection tool for the spinning manifold pressure cover according to claim 1, characterized in that: A limiting protrusion is arranged in the operating sleeve, and the limiting protrusion is arranged at a starting position of the upper part of the internal thread; and / or, The upper end surface of the support member is provided with a first detection line, and the upper end surface of the operating sleeve is provided with a second detection line, a third detection line and a fourth detection line which can be colinear with the first detection line, and the third detection line and the fourth detection line are arranged on both sides of the second detection line.

9. The detection tool for the spinning manifold pressure cover according to claim 1, characterized in that: The displacement measuring mechanism is a dial indicator, which includes a measuring rod and a probe arranged at the lower end of the measuring rod, and a through hole for the measuring rod and the probe to pass through is formed in the middle of the support member; and / or, The detection tool further comprises a locking assembly, wherein the locking assembly comprises a locking hole formed on the support member, a locking pin which can be inserted into the locking hole, and the locking pin can be abutted against the displacement measuring mechanism.

10. The detection tool for the spinning manifold pressure cover according to claim 1, characterized in that: The elastic member is a spring; and / or, The detection tool also includes a calibration piece, which at least includes a calibration external thread, and the calibration external thread is a preset standard thread of the external thread to be tested. The calibration external thread and the internal thread can be screwed together to realize the calibration of the detection tool.

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