Intermittent coating valve

Abstract

The utility model discloses an intermittent coating valve which comprises a feeding valve body, a backflow valve body, a feeding valve cone, a backflow valve cone, a feeding valve cover, a backflow valve cover, a left push-pull rod, a right push-pull rod, a servo motor and a double-eccentric crankshaft driving mechanism. A feeding port communicated with the backflow cavity is formed in the right side of the backflow valve body, the feeding cavity is communicated with the backflow cavity, the feeding valve cover is fixed to the feeding valve body, and a discharging port communicated with the feeding cavity is formed in the top of the feeding valve cover. According to the intermittent coating valve disclosed by the utility model, the pressure of the feeding hole can be kept stable all the time, so that the coating starting quality during glue dispensing is ensured; and meanwhile, the single servo motor drives the double-eccentric crankshaft driving mechanism, so that a power input component can be saved, two output ends of the double-eccentric crankshaft driving mechanism can rotate at the same part, the synchronism of intermittent opening and closing of the feeding valve cone and the backflow valve cone is ensured, and the pressure of the feeding port is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of coating valves, in particular to an intermittent coating valve. Background Art

[0002] Most of the coating valves nowadays include a valve body, a cylinder, a connecting rod and a valve cone. The valve body is provided with a chamber, a feed port connected to the upper part of the chamber and a discharge port connected to the lower part of the chamber. A valve seat is provided in the chamber, a connecting rod is slidably arranged in the chamber, the valve cone is mounted on the connecting rod, and the cylinder is mounted on the valve body, and its output end is connected to the connecting rod. When the coating valve is disconnected, the cylinder drives the connecting rod to move downward so that the valve cone is pressed on the valve seat. Although this coating valve can meet the use needs to a certain extent, its disadvantage is that the expansion and contraction of a single cylinder drives the valve to open and close, causing the glue liquid at the feed port to flow out or disconnect from the discharge port, which is bound to cause the feed port pressure to be unstable when the valve is opened and closed, thereby affecting the coating quality during dispensing. Summary of the invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provide an intermittent coating valve.

[0004] The technical solution of the utility model is as follows:

[0005] An intermittent coating valve comprises a feed valve body, a reflux valve body, a feed valve cone, a reflux valve cone, a feed valve cover, a reflux valve cover, a left push-pull rod, a right push-pull rod, a servo motor and a double eccentric crankshaft drive mechanism, wherein a feed chamber is arranged in the feed valve body, a reflux chamber is arranged on the reflux valve body, a feed port connected to the reflux chamber is arranged on the right side of the reflux valve body, the feed chamber is connected to the reflux chamber, the feed valve cover is fixed on the feed valve body, a discharge port connected to the feed chamber is arranged on the top of the feed valve cover, the reflux valve cover is fixed on the reflux valve body, a reflux port connected to the reflux chamber is arranged on the top of the reflux valve cover, the left push-pull rod is vertically slidably arranged in the feed chamber, and the The feed valve cone is fixed on the left push-pull rod and covers the top of the feed chamber, the right push-pull rod is vertically slidably arranged in the reflux chamber, the reflux valve cone is fixed on the right push-pull rod and covers the top of the reflux chamber, the two output ends of the double eccentric crankshaft drive mechanism are staggered up and down, the double eccentric crankshaft drive mechanism is installed at the bottom of the feed valve body and the return valve body, the two output ends are respectively connected with the left push-pull rod and the right push-pull rod and drive the left push-pull rod and the right push-pull rod to move intermittently up and down, the servo motor is installed on the double eccentric crankshaft drive mechanism, and its output shaft is transmission connected with the input end of the double eccentric crankshaft drive mechanism.

[0006] Preferably, the double eccentric crankshaft drive mechanism comprises a shell and two eccentric crankshaft assemblies, the eccentric crankshaft assembly comprises a positioning block, a moving block and an eccentric crankshaft, the shell is installed at the bottom of the feed valve body and the reflux valve body, and the top of the shell is connected with the feed chamber and the reflux chamber respectively, the two positioning blocks are vertically installed in the shell and are respectively located below the feed chamber and the reflux chamber, the moving block is vertically slidably arranged in the positioning block, the moving block is provided with an elliptical guide hole that horizontally penetrates the moving block, the two eccentric crankshafts are coaxially and horizontally rotatably installed in the shell, the two eccentric crankshafts are fixedly connected, the eccentric parts of the two eccentric crankshafts respectively pass through the guide holes of the two moving blocks, and the eccentric parts of the two eccentric crankshafts are staggered up and down, the bottoms of the left push-pull rod and the right push-pull rod extend into the shell and are respectively connected with the two moving blocks, and the output shaft of the servo motor is transmission connected with the eccentric crankshaft.

[0007] Preferably, the eccentric crankshaft includes a left shaft, an eccentric shaft and a right shaft, the left shaft and the right shaft are relatively concentrically arranged, the eccentric shaft is eccentrically connected between the left shaft and the right shaft, the left shaft and the right shaft are rotatably arranged in the shell and are located on both sides of the moving block, the eccentric shaft is embedded in the guide hole and rolls along the inner side of the guide hole to drive the moving block to move up and down on the positioning block, the right shaft of the eccentric crankshaft located on the left side of the shell is fixedly connected to the left shaft of the eccentric crankshaft located on the right side of the shell, and the servo motor is transmission connected to the left shaft or the right shaft.

[0008] Preferably, the housing is provided with bearings at both ends of the eccentric crankshaft, and the two ends of the eccentric crankshaft are respectively mounted on the two bearings.

[0009] Preferably, the eccentric crankshaft and the output shaft of the servo motor are connected via a coupling.

[0010] Preferably, the positioning block is vertically provided with a slide groove, and the moving block is vertically slidably arranged in the slide groove.

[0011] Preferably, the feed valve body and the return valve body are integrally formed.

[0012] Preferably, the feed valve cover and the return valve cover are integrally formed.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model utilizes a servo motor to drive a double-eccentric crankshaft drive mechanism, so that the two output ends of the double-eccentric crankshaft drive mechanism, which are staggered up and down, respectively drive the left push-pull rod and the right push-pull rod to move up and down alternately, so that the corresponding feed valve cone and the return valve cone are alternately blocked on the feed chamber and the return chamber. When the discharge port of the coating valve is closed, the feed valve cone is pressed on the feed chamber and the return valve cone leaves the return chamber, and the glue liquid material coming in from the feed port flows into the return port. When the coating valve is closed, the feed valve cone is pressed on the feed chamber and the return valve cone leaves the return chamber. When the outlet of the valve is opened, the feed valve cone leaves the feed chamber and the reflux valve cone is pressed on the reflux chamber, so that the glue liquid entering the feed port flows into the outlet, so that the pressure at the feed port is kept stable, ensuring the coating quality during dispensing; at the same time, a single servo motor drives the double-eccentric crankshaft drive mechanism, which can not only save power input components, but also allow the two output ends of the double-eccentric crankshaft drive mechanism to rotate at the same time, ensuring the synchronization of the intermittent opening and closing of the feed valve cone and the reflux valve cone, making the pressure at the feed port more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the intermittent coating valve of the utility model;

[0016] Figure 2 Another overall structural schematic diagram of the intermittent coating valve of the utility model;

[0017] Figure 3 It is a cross-sectional view of the intermittent coating valve of the utility model;

[0018] Figure 4 It is a schematic diagram of the internal structure of the double eccentric crankshaft drive mechanism of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the eccentric crankshaft of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0022] Example 1

[0023] like Figures 1 to 5 As shown, the intermittent coating valve of this embodiment includes a feed valve body 1, a reflux valve body 2, a feed valve cone 3, a reflux valve cone 4, a feed valve cover 5, a reflux valve cover 6, a left push-pull rod 7, a right push-pull rod 8, a servo motor 9 and a double eccentric crankshaft drive mechanism 10, the feed valve body 1 is provided with a feed chamber 11, the reflux valve body 2 is provided with a reflux chamber 21, the right side of the reflux valve body 2 is provided with a feed port 22 connected to the reflux chamber 21, the feed chamber 11 is connected to the reflux chamber 21, the feed valve cover 5 is fixed on the feed valve body 1, and a discharge port 51 connected to the feed chamber 11 is provided on the top of the feed valve cover 6, the reflux valve body 2 is fixed on the reflux valve body 2, and a reflux port 61 connected to the reflux chamber 21 is provided on the top of the servo motor 9, and the left push-pull rod 7 is vertically slidably arranged on the In the feed chamber 11, the feed valve cone 3 is fixed on the left push-pull rod 7 and covers the top of the feed chamber 11, the right push-pull rod 8 is vertically slidably arranged in the reflux chamber 21, the reflux valve cone 4 is fixed on the right push-pull rod 8 and covers the top of the reflux chamber 21, the two output ends of the double eccentric crankshaft drive mechanism 10 are staggered up and down, the double eccentric crankshaft drive mechanism 10 is installed at the bottom of the feed valve body 1 and the return valve body 2, and its two output ends are respectively connected with the left push-pull rod 7 and the right push-pull rod 8 and drive the left push-pull rod 7 and the right push-pull rod 8 to move intermittently up and down, and the servo motor 9 is installed on the double eccentric crankshaft drive mechanism 10, and its output shaft is transmission-connected with the input end of the double eccentric crankshaft drive mechanism 10.

[0024] During operation, the servo motor 9 rotates to drive the double eccentric crankshaft drive mechanism 10 to operate, so that the two output ends of the double eccentric crankshaft drive mechanism 10, which are staggered up and down, respectively drive the left push-pull rod 7 and the right push-pull rod 8 to move up and down alternately, so that the corresponding feed valve cone 3 and the reflux valve cone 4 are alternately blocked in the feed chamber 11 and the reflux chamber 21. When the discharge port 51 of the coating valve is closed, the feed valve cone 3 is pressed on the feed chamber 11 and the reflux valve cone 4 leaves the reflux chamber 21, and the glue liquid material coming in from the feed port 22 flows into the reflux port 61. When the discharge port 51 of the coating valve is opened, the feed valve cone 3 leaves the feed chamber 11 and the reflux valve cone 4 is pressed on the reflux chamber 21, so that the glue liquid material coming in from the feed port 22 flows into the discharge port 51. The intermittent coating valve of this embodiment can keep the pressure at the feed port stable at all times, ensuring the coating quality during dispensing; at the same time, a single servo motor drives the double-eccentric crankshaft drive mechanism, which can not only save power input components, but also allow the two output ends of the double-eccentric crankshaft drive mechanism to rotate at the same time, ensuring the synchronization of the intermittent opening and closing of the feed valve cone and the return valve cone, making the pressure at the feed port more stable.

[0025] In this embodiment, the dual eccentric crankshaft drive mechanism 10 includes a housing 101 and two eccentric crankshaft assemblies 102, the eccentric crankshaft assembly 102 includes a positioning block 103, a moving block 104 and an eccentric crankshaft 105, the housing 101 is installed at the bottom of the feed valve body 1 and the return valve body 2, and its top is connected to the feed chamber 11 and the return chamber 21 respectively, the two positioning blocks 103 are vertically installed in the housing 101 and are respectively located below the feed chamber 11 and the return chamber 21, the moving block 104 is vertically slidably arranged in the positioning block 103, and the moving block 104 is vertically slidably arranged in the positioning block 103. The block 104 is provided with an elliptical guide hole 106 which passes through the moving block 104 transversely, the two eccentric crankshafts 105 are coaxially installed in the housing 1 for transverse rotation, the two eccentric crankshafts 105 are fixedly connected, the eccentric parts of the two eccentric crankshafts 105 pass through the guide holes 106 of the two moving blocks 104 respectively, and the eccentric parts of the two eccentric crankshafts 105 are staggered up and down, the bottoms of the left push-pull rod 7 and the right push-pull rod 8 extend into the housing 1 and are respectively connected to the two moving blocks 104, and the output shaft of the servo motor 9 is in transmission connection with the eccentric crankshaft 105. Among them, the moving block 104 can be spliced ​​by an upper block and a lower block, which are fixed by screws to facilitate the matching installation of the eccentric crankshaft. The servo motor 9 rotates, driving the two eccentric crankshafts 105 to rotate. Since the eccentric shaft of the eccentric crankshaft 105 rolls in the guide hole 106 of the moving block 104, and the moving block 104 can only move up and down in the positioning block 103, the rotation of the two eccentric crankshafts 105 drives the two moving blocks 104 to slide up and down along their respective corresponding positioning blocks 103, causing the left push-pull rod 7 and the right push-pull rod 8 connected to the corresponding moving blocks 103 to move up and down intermittently in an offset manner.

[0026] In this embodiment, the eccentric crankshaft 105 includes a left shaft 1051, an eccentric shaft 1052 and a right shaft 1053. The left shaft 1051 and the right shaft 1053 are relatively concentrically arranged. The eccentric shaft 1052 is eccentrically connected between the left shaft 1051 and the right shaft 1053. The left shaft 1051 and the right shaft 1053 are rotatably arranged in the shell 1 and are located on both sides of the moving block 104. The eccentric shaft 1052 is embedded in the guide hole 106 and rolls along the inner side of the guide hole 106 to drive the moving block 104 to move up and down on the positioning block 103. The right shaft 1053 of the eccentric crankshaft 105 located on the left side of the shell 1 is fixedly connected to the left shaft 1051 of the eccentric crankshaft 105 located on the right side of the shell 1, and the servo motor 9 is transmission connected to the left shaft 1051 or the right shaft 1053. The eccentric crankshaft 105 is composed of three sections, so that both ends of the middle eccentric shaft 105 are supported and the rotation is smoother.

[0027] In this embodiment, the housing 101 is provided with bearings 107 at both ends of the eccentric crankshaft 105, and the two ends of the eccentric crankshaft 105 are respectively mounted on the two bearings 107, so as to facilitate the rotation of the eccentric crankshaft 105. The eccentric crankshaft 105 is connected to the output shaft of the servo motor 9 through a coupling 108, so that the servo motor 9 can drive the eccentric crankshaft 105 to rotate. The positioning block 103 is vertically provided with a slide groove, and the moving block 104 is vertically slidably arranged in the slide groove, so as to facilitate the sliding of the moving block 104 on the positioning block 103. As needed, the feed valve body 1 and the return valve body 2 can be separated separately or integrally formed; the feed valve cover 5 and the return valve cover 6 can be separated separately or integrally formed.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intermittent coating valve, characterized in that: The utility model comprises a feed valve body, a reflux valve body, a feed valve cone, a reflux valve cone, a feed valve cover, a reflux valve cover, a left push-pull rod, a right push-pull rod, a servo motor and a double eccentric crankshaft drive mechanism, wherein a feed chamber is arranged in the feed valve body, a reflux chamber is arranged on the reflux valve body, a feed port connected with the reflux chamber is arranged on the right side of the reflux valve body, the feed chamber is connected with the reflux chamber, the feed valve cover is fixed on the feed valve body, a discharge port connected with the feed chamber is arranged on the top of the feed valve cover, the reflux valve cover is fixed on the reflux valve body, a reflux port connected with the reflux chamber is arranged on the top of the reflux valve cover, the left push-pull rod is vertically slidably arranged in the feed chamber, the feed valve cone The servo motor is installed on the double eccentric crankshaft drive mechanism, and its output shaft is connected with the input end of the double eccentric crankshaft drive mechanism, and its output shaft is connected with the input end of the double eccentric crankshaft drive mechanism.

2. The intermittent coating valve according to claim 1, characterized in that: The double eccentric crankshaft driving mechanism comprises a shell and two eccentric crankshaft assemblies, and the eccentric crankshaft assembly comprises a positioning block, a moving block and an eccentric crankshaft, and the shell is installed at the bottom of the feed valve body and the reflux valve body, and the top of the shell is respectively connected with the feed chamber and the reflux chamber, and the two positioning blocks are vertically installed in the shell and are respectively located below the feed chamber and the reflux chamber, and the moving block is vertically slidably arranged in the positioning block, and the moving block is provided with an elliptical guide hole that horizontally penetrates the moving block, and the two eccentric crankshafts are coaxially and horizontally rotatably installed in the shell, and the two eccentric crankshafts are fixedly connected, and the eccentric parts of the two eccentric crankshafts respectively pass through the guide holes of the two moving blocks, and the eccentric parts of the two eccentric crankshafts are staggered up and down, and the bottoms of the left push-pull rod and the right push-pull rod extend into the shell and are respectively connected with the two moving blocks, and the output shaft of the servo motor is transmission connected with the eccentric crankshaft.

3. The intermittent coating valve according to claim 2, characterized in that: The eccentric crankshaft includes a left shaft, an eccentric shaft and a right shaft, the left shaft and the right shaft are relatively concentrically arranged, the eccentric shaft is eccentrically connected between the left shaft and the right shaft, the left shaft and the right shaft are rotatably arranged in the shell and are located on both sides of the moving block, the eccentric shaft is embedded in the guide hole and rolls along the inner side of the guide hole to drive the moving block to move up and down on the positioning block, the right shaft of the eccentric crankshaft located on the left side of the shell is fixedly connected to the left shaft of the eccentric crankshaft located on the right side of the shell, and the servo motor is transmission connected to the left shaft or the right shaft.

4. The intermittent coating valve according to claim 2 or 3, characterized in that: The housing is provided with bearings at both ends of the eccentric crankshaft, and the two ends of the eccentric crankshaft are respectively mounted on the two bearings.

5. The intermittent coating valve according to claim 2 or 3, characterized in that: The eccentric crankshaft is connected to the output shaft of the servo motor via a coupling.

6. The intermittent coating valve according to claim 2 or 3, characterized in that: The positioning block is vertically provided with a slide groove, and the moving block is vertically slidably arranged in the slide groove.

7. The intermittent coating valve according to any one of claims 1 to 3, characterized in that: The feed valve body and the return valve body are integrally formed.

8. The intermittent coating valve according to any one of claims 1 to 3, characterized in that: The feed valve cover and the return valve cover are integrally formed.

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