Device for detecting symmetry degree of valve seat holes in two sides of flat gate valve

Abstract

The invention relates to the technical field of symmetry degree detection, and more specifically discloses a flat gate valve two-side valve seat hole symmetry degree detection device, which comprises a detection base, the detection base comprises a base main body, the top of the base main body is provided with a first moving groove and a second moving groove, and the first moving groove is internally provided with a clamping assembly. A detection moving seat is mounted in the second moving groove, and a positioning base is mounted at the top of the detection moving seat; by arranging the transverse displacement ruler groove, the movable ruler rod and the reflecting plate, the position of reflected light can be changed through deflection of the reflecting plate, and high-precision detection of the central symmetry degree of the plane where the valve seat hole is located is completed; a first information value formed by the difference value of the average values of the measuring rods on the two sides and a second information value formed by the difference value of the numerical variation of the transverse displacement ruler groove are used for calculating the aperture machining offset, and the straightness detection of the valve seat hole is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of symmetry detection, and more particularly to a device for detecting the symmetry of valve seat holes on both sides of a flat gate valve. Background Art

[0002] A flat gate valve is a sliding valve with parallel gates as the closing element. The closing element can be a single gate or a double gate with a spreading mechanism between them. The pressing force of the gate against the valve seat is controlled by the medium pressure acting on the floating gate or floating valve seat.

[0003] The Chinese invention patent with publication number CN116989701A discloses a device for detecting the symmetry of the valve seat holes on both sides of a flat gate valve, including a workbench, a top platform is provided at the top of the workbench, and slide grooves are provided in the middle and on both sides of the top platform. A positioning device and a detection device are provided on both sides of the top of the top platform. The detection device includes a receiving screen, an infrared transmitter and an infrared generator arranged outside the infrared transmitter. The receiving screen and the infrared transmitter are respectively fixed on both sides of the top platform. Through the set detection device, the user can electrically connect the detection device to the display screen at one end, and the infrared generator in the detection device is connected to the infrared transmitter, and the infrared reflector can emit infrared rays to the receiving screen. The light passes through the central positioning device and the gate hole of the flat gate valve. If the gate holes on both sides are deviated and asymmetrical, a regular image will not appear on the receiving screen, and it will be transmitted to the display screen for real-time display, achieving the effect of convenient use.

[0004] It can be seen that the symmetry of the valve seat holes on both sides of the flat gate valve is usually detected by irradiating with parallel light. In order to maintain the irradiation angle of the light, a supporting device is usually used to support the outer side of the shell of the aperture. From the basic principle of detection, it can be seen that the outer side of the shell as a non-machined surface does not have the conditions to be used as a reference surface, so the verticality of the aperture cannot be guaranteed. Referring to the basic machining principles during the boring process, it can be seen that if the clamping angle is deflected, the complete aperture left behind can still allow the light to present a standard circle. Therefore, the detection error is large, and the aperture parameters cannot be detected efficiently and accurately. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a device for detecting the symmetry of valve seat holes on both sides of a flat gate valve, so as to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a device for detecting the symmetry of valve seat holes on both sides of a flat gate valve, comprising a detection base, the detection base comprising a base body, a first movable groove and a second movable groove are provided on the top of the base body, a clamping assembly is installed inside the first movable groove, a detection movable seat is installed inside the second movable groove, and a positioning base is installed on the top of the detection movable seat, the base body is provided with a first gear groove and a second gear groove, the first gear groove is provided with a first reduction gear, the second gear groove is provided with a second reduction gear, the bottom of the first reduction gear is fixedly connected to a worm threaded rod, the worm threaded rod is meshed with the second reduction gear to form a worm structure, the bottom of the second gear groove is provided with a longitudinal movable groove and an optical detection groove, the longitudinal movable groove is provided with a lifting gear plate, the second reduction gear is meshed with the lifting gear plate, a reflector is installed on the top of the optical detection groove, a light source is installed at a 45-degree position on the arc surface of the bottom of the optical detection groove, a detection valve seat is placed in the middle of the top of the base body, and the clamping assembly is inside the detection valve seat; Furthermore, the positioning base includes a positioning body, which consists of a positioning part and a detection part. The diameter of the positioning part is smaller than that of the detection part. A detection positioning head is installed inside the positioning part, and a plane detection head is installed on the side of the detection part. The plane detection head is used to perform flatness detection on the plane where the aperture is located, calculate the plane inclination angle, and perform parallelism detection on the two planes. A rotating main rod is installed inside the positioning body, and a movable ring frame is sleeved on the outer side of the rotating main rod. The movable ring frame is hingedly connected to the detection positioning head through a connecting rod.

[0007] Furthermore, a movable ruler rod is hinged at the bottom of the side of the positioning body, and the movable ruler rod is composed of a hinged plate and a measuring rod. When the positioning body rises, it moves up and down so that the movable ruler rod drives the measuring rod to move inside the height ruler slot. The movement values ​​of the two measuring rods are averaged as the rising height value, and the difference between the two average values ​​is the height displacement difference on both sides of the aperture, which is called the first information value. After the positioning process is completed, the positioning body drives the support frame to move left and right, so that the lower gear plate drives the first main gear to rotate. After the amplification process of the amplifying gear set, the value is displayed through the lateral displacement ruler slot. The difference between the numerical changes of the lateral displacement ruler slots on both sides is taken to form the second information value. The first information value and the second information value are calculated and combined to calculate the aperture processing offset, thereby completing the straightness detection of the valve seat hole.

[0008] Furthermore, the bottom of the positioning body is mounted on a support frame, the bottom of the support frame is fixedly connected to a lower tooth plate, the bottom of the lower tooth plate is provided with a tooth groove, and the tooth groove is meshed with the first main gear.

[0009] Furthermore, the detection mobile base includes a mobile shell, and a first main gear is installed at the bottom of the positioning base inside the mobile shell. The bottom of the first main gear is meshed with the amplifying gear set, and the other end gear of the amplifying gear set is meshed with the synchronous gear. The outer side of the synchronous gear is located inside the lateral displacement scale slot and is fixedly connected with a pointer. The bottom of the mobile shell is fixedly connected to two guide rails, and the bottom of one of the guide rails is fixedly connected to a horizontal gear plate.

[0010] Furthermore, the clamping assembly includes a ball rack and a mirror threaded rod. A mirror threaded groove is provided on the surface of the mirror threaded rod, and two ball racks are sleeved on the outer side of the mirror threaded groove.

[0011] Furthermore, the detection and positioning head includes a detection sleeve rod, a placement groove is provided on the top of the detection sleeve rod, a positioning pressure head is installed inside the placement groove, the positioning pressure head is located inside the detection sleeve rod and is sleeved with a second spring, and the outside of the detection sleeve rod is sleeved with a first spring. When the mobile ring frame moves, the detection and positioning head extends outward until the positioning pressure head is completely retracted into the inside of the detection sleeve rod. The three points determine the center position of the circle, and the center of the circle is located at the center position of the positioning part to complete the positioning. The moving distance of the mobile ring frame and the size of the aperture are calculated by calculating the rotation angle information of the rotating main rod.

[0012] Furthermore, the lifting gear plate includes an upper gear plate and a lower connecting plate. The top of the lower connecting plate is fixedly connected to two straight rods. The lower connecting plate is installed inside the upper gear plate through the straight rods. The outer side of the straight rods is sleeved with a third spring. The lower connecting plate is hinged on both sides of the top of the reflector, and the upper gear plate is meshed with the second reduction gear.

[0013] Furthermore, a pressure sensor is installed at the bottom of the positioning pressure head. When the positioning pressure head is completely retracted into the interior of the detection sleeve, the pressure sensor is triggered to collect pressure information while controlling the rotating main rod to stop moving.

[0014] The technical effects and advantages of the present invention are as follows: 1. This invention utilizes a transverse displacement scale slot, a movable scale rod, and a reflector to facilitate high-precision testing of the central symmetry of the plane in which the valve seat hole is located by utilizing the deflection of the reflector to change the position of reflected light. Using a first information value formed by the difference in the average values ​​of the measuring rods on both sides and a second information value formed by the difference in the numerical change of the transverse displacement scale slot, the aperture machining offset is calculated to complete the straightness test of the valve seat hole.

[0015] 2. The present invention utilizes a plane detection head, which facilitates contact between the three contact points of the plane detection head and the hole plane of the detection valve seat. The information processing unit calculates the plane inclination angle, and then determines the inclination difference between the two planes, thereby achieving parallelism detection of the two planes.

[0016] 3. The present invention provides a clamping assembly, which facilitates the ball rack to move toward both ends of the mirror threaded rod when the mirror threaded rod rotates forward. The ball of the ball rack supports the test valve seat outward from the inside of the test valve seat, achieving positioning and clamping at the middle position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the detection base of the present invention.

[0020] Figure 4 This is a cross-sectional view of the detection base structure of the present invention.

[0021] Figure 5 It is a side sectional view of the overall structure of the present invention.

[0022] Figure 6 The appended Figure 5 Schematic diagram of the structure of A in the figure.

[0023] Figure 7 It is a structural schematic diagram of the detection movable seat of the present invention.

[0024] Figure 8 Schematic diagram of the support structure of the present invention.

[0025] Figure 9 It is a schematic diagram of the positioning base structure of the present invention.

[0026] Figure 10 This is a schematic structural diagram of the detection and positioning head of the present invention.

[0027] Figure 11 It is a schematic diagram of the lifting gear plate structure of the present invention.

[0028] The accompanying drawings are marked as follows: 1. Detection base; 101. Base body; 102. First moving groove; 103. Second moving groove; 104. First gear groove; 105. Second gear groove; 106. Longitudinal moving groove; 107. Optical detection groove; 108. Display screen; 2. Detection moving base; 201. Moving housing; 202. First main gear; 203. Transverse displacement ruler groove; 204. Amplification gear set; 205. Synchronous gear; 206. Horizontal tooth plate; 3. Positioning base; 301. Positioning body; 302. Rotating main rod; 303. Moving ring frame; 304. Detection positioning head; 3 041. Detection sleeve rod; 3042. Positioning pressure head; 3043. First spring; 3044. Second spring; 3045. Connecting block; 305. Plane detection head; 306. Support frame; 307. Moving ruler rod; 308. Height gauge slot; 309. Lower gear plate; 4. Clamping assembly; 401. Ball rack; 402. Mirror threaded rod; 5. First reduction gear; 6. Worm threaded rod; 7. Second reduction gear; 8. Lifting gear plate; 801. Upper gear plate; 802. Lower connecting plate; 803. Straight rod; 804. Third spring; 9. Reflector; 10. Light source; 11. Detection valve seat. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The device for detecting the symmetry of the valve seat holes on both sides of a flat gate valve involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Reference Figure 1-Figure 4The present invention provides a device for detecting the symmetry of valve seat holes on both sides of a flat gate valve, comprising a detection base 1, the detection base 1 comprising a base body 101, a first movable groove 102 and a second movable groove 103 are provided on the top of the base body 101, a clamping assembly 4 is installed inside the first movable groove 102, a detection movable seat 2 is installed inside the second movable groove 103, a positioning base 3 is installed on the top of the detection movable seat 2, a first gear groove 104 and a second gear groove 105 are provided inside the base body 101, a first reduction gear 5 is installed inside the first gear groove 104, and a second gear groove 105 is installed inside The second reduction gear 7 and the bottom of the first reduction gear 5 are fixedly connected with a worm threaded rod 6, which is meshed with the second reduction gear 7 to form a worm structure. A longitudinal moving groove 106 and an optical detection groove 107 are provided at the bottom of the second gear groove 105. A lifting gear plate 8 is installed inside the longitudinal moving groove 106. The second reduction gear 7 is meshed with the lifting gear plate 8. A reflector 9 is installed on the top of the optical detection groove 107. A light source 10 is installed at a 45-degree position on the arc surface at the bottom of the optical detection groove 107. A detection valve seat 11 is placed in the middle of the top of the base body 101, and the clamping assembly 4 is inside the detection valve seat 11; In this embodiment, it needs to be specifically explained that: the detection valve seat 11 is placed in reverse on the top plane of the base body 101, and when the ball rack 401 moves toward the two ends of the mirror threaded rod 402, the ball of the ball rack 401 supports the detection valve seat 11 outward from the inside of the detection valve seat 11, thereby realizing the positioning and clamping of the detection valve seat 11.

[0031] The main difference between this embodiment and the prior art is that in this embodiment, the left-right moving distance difference of the detection movable seat 2 is converted into the deflection angle of the reflector 9, and then the light of the light source 10 is used to achieve high-precision detection of the symmetry of the valve seat holes on both sides of the valve seat, specifically in the detection movable seat 2, the lifting gear plate 8, and the reflector 9; The above structure is the main structure of this embodiment, which solves the problem that the current optical detection method cannot detect symmetry information with high precision. The motor connection method of the mirror threaded rod 402 and the rotating main rod 302 is the existing structure. The specific structure of the connection between the mirror threaded rod 402 and the rotating main rod 302 is not described in detail in this embodiment.

[0032] Reference Figure 5-Figure 6 The clamping assembly 4 includes a ball rack 401 and a mirror threaded rod 402. A mirror threaded groove is provided on the surface of the mirror threaded rod 402. Two ball racks 401 are sleeved on the outer side of the mirror threaded groove. When the mirror threaded rod 402 rotates, the ball rack 401 moves toward the two ends of the mirror threaded rod 402. The ball of the ball rack 401 supports the detection valve seat 11 outward from the inside of the detection valve seat 11, thereby realizing positioning and clamping in the middle position.

[0033] In this embodiment, it should be specifically explained that: placing the detection valve seat 11 in reverse on the top plane of the base body 101 helps to use the upper processed surface of the detection valve seat 11 as a reference surface for detection, and at the same time, using the support of the ball rack 401 helps to use the internal center surface of the detection valve seat 11 as the second reference surface for symmetry detection, which provides a more accurate detection basis.

[0034] Reference Figure 7 The detection mobile base 2 includes a mobile shell 201. The interior of the mobile shell 201 is located at the bottom of the positioning base 3 and is equipped with a first main gear 202. The bottom of the first main gear 202 is meshed with the amplifying gear set 204. The other end gear of the amplifying gear set 204 is meshed with the synchronous gear 205. The outer side of the synchronous gear 205 is located inside the lateral displacement scale slot 203 and is fixedly connected to a pointer. The bottom of the mobile shell 201 is fixedly connected to two guide rails, and the bottom of one of the guide rails is fixedly connected to a horizontal tooth plate 206.

[0035] In this embodiment, it should be specifically explained that: this application does not limit the reduction ratio of the amplifying gear set 204, and an information processing unit is installed inside the detection base 1. The installation method of the information processing unit and the calculation formula based on the processing belong to the existing technology and will not be elaborated in detail in this application.

[0036] Reference Figure 8 A movable ruler rod 307 is hinged at the bottom of the side of the positioning body 301. The movable ruler rod 307 consists of a hinged plate and a measuring rod. When the positioning body 301 rises, it moves up and down, causing the movable ruler rod 307 to drive the measuring rod to move inside the height ruler slot 308. Since two measuring rods are installed on the single-sided positioning base 3, the average value of the movement values ​​of the two measuring rods is taken as the rising height value, and the four measuring rods form two average values. The difference between the two average values ​​is the height displacement difference on both sides of the aperture, which is called the first information value.

[0037] In this embodiment, it should be specifically explained that: the bottom of the positioning body 301 is mounted on the support frame 306, and the bottom of the support frame 306 is fixedly connected to the lower tooth plate 309. The bottom of the lower tooth plate 309 is provided with a tooth groove, which is meshed with the first main gear 202. After the positioning process is completed, the positioning body 301 drives the support frame 306 to move left and right. The left and right movement of the support frame 306 causes the lower tooth plate 309 to drive the first main gear 202 to rotate. The rotation of the first main gear 202 is amplified by the amplifying gear set 204 and then displayed through the lateral displacement scale groove 203. The difference between the numerical changes of the lateral displacement scale grooves 203 on both sides is taken to form a second information value. The first information value and the second information value are combined to calculate the aperture machining offset. At this time, the straightness detection of the valve seat hole is completed. It should be noted that the values ​​detected in this process are all changes, not displayed values. Therefore, in actual use, it is necessary to pay attention not only to the displayed values ​​after positioning, but also to the numerical information before positioning to facilitate the calculation of the change value.

[0038] Reference Figure 2 and Figure 9 The positioning base 3 includes a positioning body 301, which consists of a positioning part and a detection part. The diameter of the positioning part is smaller than that of the detection part. A detection positioning head 304 is installed inside the positioning part, and a plane detection head 305 is installed on the side of the detection part. The plane detection head 305 is used to perform flatness detection on the plane where the aperture is located, calculate the plane inclination angle, and perform parallelism detection on the two planes. A rotating main rod 302 is installed inside the positioning body 301, and a mobile ring frame 303 is sleeved on the outer side of the rotating main rod 302. The mobile ring frame 303 and the detection positioning head 304 are hingedly connected by a connecting rod. When the mobile ring frame 303 moves, the detection positioning head 304 extends outward until the positioning pressure head 3042 is completely retracted into the interior of the detection sleeve rod 3041. Since the three points determine the position of the center of the circle, the three are subjected to the same force at this time, and the center of the circle is located at the center of the positioning part.

[0039] In this embodiment, it should be specifically explained that: in the above process, as the positioning is completed, when the positioning pressure head 3042 is completely retracted into the interior of the detection sleeve rod 3041, the movement distance of the movable ring frame 303 is calculated by the rotation angle information of the rotating main rod 302, and then the size of the aperture is calculated.

[0040] Reference Figure 10The detection and positioning head 304 includes a detection sleeve rod 3041, a placement groove is opened on the top of the detection sleeve rod 3041, a positioning pressure head 3042 is installed inside the placement groove, the positioning pressure head 3042 is located inside the detection sleeve rod 3041 and is sleeved with a second spring 3044, and the outer side of the detection sleeve rod 3041 is sleeved with a first spring 3043. During the positioning process, when the positioning pressure head 3042 contacts the arc surface, the arc surface exerts the same reverse force on the three positioning pressure heads 3042. The positioning process ends when the positioning pressure head 3042 is completely retracted to the inside of the detection sleeve rod 3041.

[0041] In this embodiment, it should be specifically explained that a pressure sensor is installed at the bottom of the positioning pressure head 3042. When the positioning pressure head 3042 is fully retracted into the inside of the detection sleeve rod 3041, the pressure sensor is triggered to collect pressure information while controlling the rotating main rod 302 to stop moving.

[0042] Reference Figure 11 The lifting gear plate 8 includes an upper gear plate 801 and a lower connecting plate 802. The top of the lower connecting plate 802 is fixedly connected to two straight rods 803. The lower connecting plate 802 is installed inside the upper gear plate 801 through the straight rod 803. The outer side of the straight rod 803 is sleeved with a third spring 804. The lower connecting plate 802 is hinged on both sides of the top of the reflector 9. The upper gear plate 801 is meshed with the second reduction gear 7. When the detection moving base 2 moves, the horizontal gear plate 206 drives the first reduction gear 5 to start rotating, and the worm threaded rod 6 slows down the rotation of the first reduction gear 5 and transmits It is passed to the second reduction gear 7, and the second reduction gear 7 drives the upper tooth plate 801 to rise. At this time, the moving distance of the detection movable base 2 on both sides is converted into the rising height of the upper tooth plate 801. The rising pulling force of the upper tooth plate 801 causes the lower connecting plate 802 to apply pulling force to both sides of the reflector 9. The pulling force difference is the moving distance difference of the two detection movable bases 2. Since the middle part of the reflector 9 is hingedly installed inside the optical detection slot 107, the pulling force difference causes the reflector 9 to start rotating under the action of the lower connecting plate 802, and the rotation causes the light reflection position of the light source 10 to change.

[0043] In this embodiment, it should be specifically explained that: during the torque transmission process, the first reduction gear 5 and the worm threaded rod 6 reduce the moving distance of the detection movable seat 2 proportionally, which is then converted into pressure on the third spring 804 to avoid excessive stretching and compression of the third spring 804. The deflection of the reflector 9 is to amplify the detection accuracy. By expanding the radius of the optical detection slot 107, the deflection displacement of the light reflection position of the light source 10 within a unit angle is larger, which can achieve a more accurate detection effect.

[0044] Working principle of the present invention: The main problem solved by this embodiment is: using the difference in the left and right moving distance of the detection movable seat 2 to convert it into the deflection angle of the reflector 9, and then using the light from the light source 10 to achieve high-precision detection of the symmetry of the valve seat holes on both sides of the valve seat, while using the positioning function of the detection positioning head 304 to change the height of the positioning body 301 and the rotation angle of the synchronization gear 205, to achieve detection of the symmetry of the center points of the valve seat holes on both sides, and using the plane detection head 305 to achieve detection of the surface flatness of the valve seat holes.

[0045] The specific steps are as follows: First, place the detection valve seat 11 in reverse on the top plane of the base body 101, start the mirror threaded rod 402 to rotate forward, and the ball rack 401 moves toward the two ends of the mirror threaded rod 402. The ball of the ball rack 401 supports the detection valve seat 11 outward inside the detection valve seat 11 to achieve positioning and clamping at the middle position. Then, push the movable housing 201 from both sides to the middle position. Since the horizontal tooth plate 206 is engaged with the first reduction gear 5, the first reduction gear 5 starts to rotate under the drive of the horizontal tooth plate 206, and the worm threaded rod 6 slows down the rotation of the first reduction gear 5 and transmits it to the second reduction gear. At gear 7, the second reduction gear 7 drives the upper toothed plate 801 to rise. Since the moving distances of the detection movable seats 2 on both sides are converted into the rising heights of the upper toothed plate 801, when there is a difference in the moving distances of the detection movable seats 2 on both sides, the rising heights of the two upper toothed plates 801 are different. At this time, the reflector 9 is deflected under the action of the lower connecting plate 802, and the light from the light source 10 is irradiated on the reflector 9. The deflection of the reflector 9 causes the position of the reflected light to change. After the data is processed by the information processing unit, it is displayed to the observer through the display screen 108. At this time, the central symmetry detection of the plane where the valve seat hole is located is completed; During this process, the three contacts of the plane detection head 305 are in contact with the hole plane of the detection valve seat 11. Since pressure sensors are installed inside the three contacts, the relevant values ​​of the pressure sensors are calculated by the information processing unit to obtain the plane inclination angle, and then the inclination angle difference between the two planes is obtained to achieve the parallelism detection of the two planes. The main rotating rod 302 is started to rotate and control the moving ring frame 303 to move toward one side of the detection positioning head 304. Since the moving ring frame 303 is hinged to the side of the detection positioning head 304 through the connecting rod, when the moving ring frame 303 moves, the detection positioning head 304 extends outward until the positioning pressure head 3042 is completely retracted into the interior of the detection sleeve rod 3041. Since the three points determine the position of the center of the circle, the three are subjected to the same force at this time, and the center of the circle is located at the center of the positioning part. During this process, the thrust of the connecting block 3045 first overcomes the pressure of the first spring 3043, causing the part where the positioning pressure head 3042 is located to extend outward. When it contacts the arc surface, the arc surface exerts a reverse force on the positioning pressure head 3042, thereby realizing the center positioning process; In the above process, as the positioning is completed, the positioning body 301 will move up and down under the action of the positioning pressure. Its up and down movement causes the movable ruler rod 307 to drive the measuring rod to move inside the height ruler slot 308. The movement values ​​of the two measuring rods on the single-side positioning base 3 are averaged, and the height displacement difference is calculated by the difference between the two average values ​​on both sides to form a first information value. The positioning body 301 moves left and right to cause the lower gear plate 309 to drive the first main gear 202 to rotate. The rotation of the first main gear 202 is amplified by the amplification process of the amplifying gear set 204 and then displayed through the lateral displacement ruler slot 203. The numerical changes of the lateral displacement ruler slots 203 on both sides are taken as the difference to form a second information value. The first information value and the second information value are combined to calculate the aperture processing offset. At this time, the straightness detection of the valve seat hole is completed; During the positioning process, when the positioning pressure head 3042 contacts the arc surface, the arc surface exerts the same reverse force on the three positioning pressure heads 3042. The positioning process ends when the positioning pressure head 3042 is completely retracted into the inside of the detection sleeve rod 3041. At this time, the aperture size is calculated based on the rotation angle information of the rotating main rod 302.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for detecting the symmetry of valve seat holes on both sides of a flat gate valve, comprising a detection base (1), characterized in that: The detection base (1) comprises a base body (101), a first movable groove (102) and a second movable groove (103) are provided on the top of the base body (101), a clamping assembly (4) is installed inside the first movable groove (102), a detection movable seat (2) is installed inside the second movable groove (103), a positioning base (3) is installed on the top of the detection movable seat (2), a first gear groove (104) and a second gear groove (105) are provided inside the base body (101), a first reduction gear (5) is installed inside the first gear groove (104), a second reduction gear (7) is installed inside the second gear groove (105), the first reduction gear (5) The bottom of the base (101) is fixedly connected with a worm threaded rod (6), the worm threaded rod (6) is meshed with the second reduction gear (7) to form a worm structure, the bottom of the second gear groove (105) is provided with a longitudinal movement groove (106) and an optical detection groove (107), the interior of the longitudinal movement groove (106) is provided with a lifting tooth plate (8), the second reduction gear (7) is meshed with the lifting tooth plate (8), the top of the optical detection groove (107) is provided with a reflector (9), a light source (10) is provided at a 45-degree position on the arc surface of the bottom of the optical detection groove (107), a detection valve seat (11) is placed in the middle of the top of the base body (101), and the clamping assembly (4) is inside the detection valve seat (11); The positioning base (3) comprises a positioning body (301), the positioning body (301) being composed of a positioning portion and a detection portion, the positioning portion having a smaller diameter than the detection portion, a detection positioning head (304) being installed inside the positioning portion, and a plane detection head (305) being installed on the side of the detection portion, the plane detection head (305) being used to perform flatness detection on the plane where the aperture is located, calculate the plane inclination angle, and perform parallelism detection on two planes, a rotating main rod (302) being installed inside the positioning body (301), a movable ring frame (303) being sleeved on the outer side of the rotating main rod (302), and the movable ring frame (303) being hingedly connected to the detection positioning head (304) via a connecting rod.

2. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 1, characterized in that: The bottom of the side of the positioning body (301) is hinged with a movable ruler rod (307), and the movable ruler rod (307) is composed of a hinge plate and a measuring rod. When the positioning body (301) rises, it moves up and down so that the movable ruler rod (307) drives the measuring rod to move inside the height ruler slot (308). The movement values ​​of the two measuring rods are averaged as the rising height value. The difference between the two average values ​​is the height displacement difference on both sides of the aperture, which is called the first information value. After the positioning process is completed, the positioning body (301) drives the support frame (306) to move left and right, so that the lower gear plate (309) drives the first main gear (202) to rotate. After the amplification process of the amplifying gear set (204), the value is displayed through the lateral displacement ruler slot (203). The difference between the value changes of the lateral displacement ruler slots (203) on both sides is taken to form a second information value. The first information value and the second information value are combined to calculate the aperture processing offset, thereby completing the straightness detection of the valve seat hole.

3. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 1, characterized in that: The bottom of the positioning body (301) is mounted on a support frame (306), and a lower tooth plate (309) is fixedly connected to the bottom of the support frame (306). A tooth groove is provided at the bottom of the lower tooth plate (309), and the tooth groove is meshed with the first main gear (202).

4. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 1, characterized in that: The detection movable seat (2) comprises a movable housing (201), wherein a first main gear (202) is installed at the bottom of the positioning base (3) inside the movable housing (201), the bottom of the first main gear (202) is meshed with the amplifying gear set (204), the other end gear of the amplifying gear set (204) is meshed with the synchronous gear (205), the outer side of the synchronous gear (205) is located inside the lateral displacement ruler slot (203), and a pointer is fixedly connected thereto. Two guide rails are fixedly connected to the bottom of the movable housing (201), and a horizontal tooth plate (206) is fixedly connected to the bottom of one of the guide rails.

5. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 1, characterized in that: The clamping assembly (4) comprises a ball rack (401) and a mirror threaded rod (402). A mirror threaded groove is provided on the surface of the mirror threaded rod (402), and two ball racks (401) are sleeved on the outer sides of the mirror threaded groove.

6. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 1, characterized in that: The detection positioning head (304) comprises a detection sleeve rod (3041), a placement groove is provided on the top of the detection sleeve rod (3041), a positioning pressure head (3042) is installed inside the placement groove, the positioning pressure head (3042) is located inside the detection sleeve rod (3041) and is sleeved with a second spring (3044), and the outer side of the detection sleeve rod (3041) is sleeved with a first spring (3043), when the movable ring frame (303) moves, the detection positioning head (304) extends outward until the positioning pressure head (3042) is completely retracted into the interior of the detection sleeve rod (3041), the three points determine the center position of the circle, the center of the circle is located at the center position of the positioning part, and the positioning is completed, and the movement distance of the movable ring frame (303) is calculated by the rotation angle information of the rotating main rod (302), and the size of the aperture is calculated.

7. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 1, characterized in that: The lifting tooth plate (8) comprises an upper tooth plate (801) and a lower connecting plate (802). The top of the lower connecting plate (802) is fixedly connected to two straight rods (803). The lower connecting plate (802) is mounted inside the upper tooth plate (801) via the straight rods (803). A third spring (804) is sleeved on the outer side of the straight rods (803). The lower connecting plate (802) is hinged to both sides of the top of the reflector (9). The upper tooth plate (801) is meshedly connected to the second reduction gear (7).

8. The device for detecting the symmetry of valve seat holes on both sides of a flat gate valve according to claim 6, characterized in that: A pressure sensor is installed at the bottom of the positioning pressure head (3042). When the positioning pressure head (3042) is completely retracted into the interior of the detection sleeve rod (3041), the pressure sensor is triggered to collect pressure information while controlling the rotating main rod (302) to stop moving.

Images